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git/compat/mingw.c
Johannes Schindelin ff3bc65b0a mingw: really handle SIGINT 
Previously, we did not install any handler for Ctrl+C, but now we really
want to because the MSYS2 runtime learned the trick to call the
ConsoleCtrlHandler when Ctrl+C was pressed.

With this, hitting Ctrl+C while `git log` is running will only terminate
the Git process, but not the pager. This finally matches the behavior on
Linux and on macOS.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
2018-09-05 09:25:57 -04:00

3596 lines
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#include "../git-compat-util.h"
#include "win32.h"
#include <conio.h>
#include <wchar.h>
#include <winioctl.h>
#include "../strbuf.h"
#include "../run-command.h"
#include "../cache.h"
#include "win32/lazyload.h"
#include "win32/exit-process.h"
#include "../config.h"
#include "../string-list.h"
#define HCAST(type, handle) ((type)(intptr_t)handle)
int err_win_to_posix(DWORD winerr)
{
int error = ENOSYS;
switch(winerr) {
case ERROR_ACCESS_DENIED: error = EACCES; break;
case ERROR_ACCOUNT_DISABLED: error = EACCES; break;
case ERROR_ACCOUNT_RESTRICTION: error = EACCES; break;
case ERROR_ALREADY_ASSIGNED: error = EBUSY; break;
case ERROR_ALREADY_EXISTS: error = EEXIST; break;
case ERROR_ARITHMETIC_OVERFLOW: error = ERANGE; break;
case ERROR_BAD_COMMAND: error = EIO; break;
case ERROR_BAD_DEVICE: error = ENODEV; break;
case ERROR_BAD_DRIVER_LEVEL: error = ENXIO; break;
case ERROR_BAD_EXE_FORMAT: error = ENOEXEC; break;
case ERROR_BAD_FORMAT: error = ENOEXEC; break;
case ERROR_BAD_LENGTH: error = EINVAL; break;
case ERROR_BAD_PATHNAME: error = ENOENT; break;
case ERROR_BAD_PIPE: error = EPIPE; break;
case ERROR_BAD_UNIT: error = ENODEV; break;
case ERROR_BAD_USERNAME: error = EINVAL; break;
case ERROR_BROKEN_PIPE: error = EPIPE; break;
case ERROR_BUFFER_OVERFLOW: error = ENAMETOOLONG; break;
case ERROR_BUSY: error = EBUSY; break;
case ERROR_BUSY_DRIVE: error = EBUSY; break;
case ERROR_CALL_NOT_IMPLEMENTED: error = ENOSYS; break;
case ERROR_CANNOT_MAKE: error = EACCES; break;
case ERROR_CANTOPEN: error = EIO; break;
case ERROR_CANTREAD: error = EIO; break;
case ERROR_CANTWRITE: error = EIO; break;
case ERROR_CRC: error = EIO; break;
case ERROR_CURRENT_DIRECTORY: error = EACCES; break;
case ERROR_DEVICE_IN_USE: error = EBUSY; break;
case ERROR_DEV_NOT_EXIST: error = ENODEV; break;
case ERROR_DIRECTORY: error = EINVAL; break;
case ERROR_DIR_NOT_EMPTY: error = ENOTEMPTY; break;
case ERROR_DISK_CHANGE: error = EIO; break;
case ERROR_DISK_FULL: error = ENOSPC; break;
case ERROR_DRIVE_LOCKED: error = EBUSY; break;
case ERROR_ENVVAR_NOT_FOUND: error = EINVAL; break;
case ERROR_EXE_MARKED_INVALID: error = ENOEXEC; break;
case ERROR_FILENAME_EXCED_RANGE: error = ENAMETOOLONG; break;
case ERROR_FILE_EXISTS: error = EEXIST; break;
case ERROR_FILE_INVALID: error = ENODEV; break;
case ERROR_FILE_NOT_FOUND: error = ENOENT; break;
case ERROR_GEN_FAILURE: error = EIO; break;
case ERROR_HANDLE_DISK_FULL: error = ENOSPC; break;
case ERROR_INSUFFICIENT_BUFFER: error = ENOMEM; break;
case ERROR_INVALID_ACCESS: error = EACCES; break;
case ERROR_INVALID_ADDRESS: error = EFAULT; break;
case ERROR_INVALID_BLOCK: error = EFAULT; break;
case ERROR_INVALID_DATA: error = EINVAL; break;
case ERROR_INVALID_DRIVE: error = ENODEV; break;
case ERROR_INVALID_EXE_SIGNATURE: error = ENOEXEC; break;
case ERROR_INVALID_FLAGS: error = EINVAL; break;
case ERROR_INVALID_FUNCTION: error = ENOSYS; break;
case ERROR_INVALID_HANDLE: error = EBADF; break;
case ERROR_INVALID_LOGON_HOURS: error = EACCES; break;
case ERROR_INVALID_NAME: error = EINVAL; break;
case ERROR_INVALID_OWNER: error = EINVAL; break;
case ERROR_INVALID_PARAMETER: error = EINVAL; break;
case ERROR_INVALID_PASSWORD: error = EPERM; break;
case ERROR_INVALID_PRIMARY_GROUP: error = EINVAL; break;
case ERROR_INVALID_REPARSE_DATA: error = EINVAL; break;
case ERROR_INVALID_SIGNAL_NUMBER: error = EINVAL; break;
case ERROR_INVALID_TARGET_HANDLE: error = EIO; break;
case ERROR_INVALID_WORKSTATION: error = EACCES; break;
case ERROR_IO_DEVICE: error = EIO; break;
case ERROR_IO_INCOMPLETE: error = EINTR; break;
case ERROR_LOCKED: error = EBUSY; break;
case ERROR_LOCK_VIOLATION: error = EACCES; break;
case ERROR_LOGON_FAILURE: error = EACCES; break;
case ERROR_MAPPED_ALIGNMENT: error = EINVAL; break;
case ERROR_META_EXPANSION_TOO_LONG: error = E2BIG; break;
case ERROR_MORE_DATA: error = EPIPE; break;
case ERROR_NEGATIVE_SEEK: error = ESPIPE; break;
case ERROR_NOACCESS: error = EFAULT; break;
case ERROR_NONE_MAPPED: error = EINVAL; break;
case ERROR_NOT_A_REPARSE_POINT: error = EINVAL; break;
case ERROR_NOT_ENOUGH_MEMORY: error = ENOMEM; break;
case ERROR_NOT_READY: error = EAGAIN; break;
case ERROR_NOT_SAME_DEVICE: error = EXDEV; break;
case ERROR_NO_DATA: error = EPIPE; break;
case ERROR_NO_MORE_SEARCH_HANDLES: error = EIO; break;
case ERROR_NO_PROC_SLOTS: error = EAGAIN; break;
case ERROR_NO_SUCH_PRIVILEGE: error = EACCES; break;
case ERROR_OPEN_FAILED: error = EIO; break;
case ERROR_OPEN_FILES: error = EBUSY; break;
case ERROR_OPERATION_ABORTED: error = EINTR; break;
case ERROR_OUTOFMEMORY: error = ENOMEM; break;
case ERROR_PASSWORD_EXPIRED: error = EACCES; break;
case ERROR_PATH_BUSY: error = EBUSY; break;
case ERROR_PATH_NOT_FOUND: error = ENOENT; break;
case ERROR_PIPE_BUSY: error = EBUSY; break;
case ERROR_PIPE_CONNECTED: error = EPIPE; break;
case ERROR_PIPE_LISTENING: error = EPIPE; break;
case ERROR_PIPE_NOT_CONNECTED: error = EPIPE; break;
case ERROR_PRIVILEGE_NOT_HELD: error = EACCES; break;
case ERROR_READ_FAULT: error = EIO; break;
case ERROR_REPARSE_ATTRIBUTE_CONFLICT: error = EINVAL; break;
case ERROR_REPARSE_TAG_INVALID: error = EINVAL; break;
case ERROR_REPARSE_TAG_MISMATCH: error = EINVAL; break;
case ERROR_SEEK: error = EIO; break;
case ERROR_SEEK_ON_DEVICE: error = ESPIPE; break;
case ERROR_SHARING_BUFFER_EXCEEDED: error = ENFILE; break;
case ERROR_SHARING_VIOLATION: error = EACCES; break;
case ERROR_STACK_OVERFLOW: error = ENOMEM; break;
case ERROR_SWAPERROR: error = ENOENT; break;
case ERROR_TOO_MANY_MODULES: error = EMFILE; break;
case ERROR_TOO_MANY_OPEN_FILES: error = EMFILE; break;
case ERROR_UNRECOGNIZED_MEDIA: error = ENXIO; break;
case ERROR_UNRECOGNIZED_VOLUME: error = ENODEV; break;
case ERROR_WAIT_NO_CHILDREN: error = ECHILD; break;
case ERROR_WRITE_FAULT: error = EIO; break;
case ERROR_WRITE_PROTECT: error = EROFS; break;
}
return error;
}
static inline int is_file_in_use_error(DWORD errcode)
{
switch (errcode) {
case ERROR_SHARING_VIOLATION:
case ERROR_ACCESS_DENIED:
return 1;
}
return 0;
}
static int read_yes_no_answer(void)
{
char answer[1024];
if (fgets(answer, sizeof(answer), stdin)) {
size_t answer_len = strlen(answer);
int got_full_line = 0, c;
/* remove the newline */
if (answer_len >= 2 && answer[answer_len-2] == '\r') {
answer[answer_len-2] = '\0';
got_full_line = 1;
} else if (answer_len >= 1 && answer[answer_len-1] == '\n') {
answer[answer_len-1] = '\0';
got_full_line = 1;
}
/* flush the buffer in case we did not get the full line */
if (!got_full_line)
while ((c = getchar()) != EOF && c != '\n')
;
} else
/* we could not read, return the
* default answer which is no */
return 0;
if (tolower(answer[0]) == 'y' && !answer[1])
return 1;
if (!strncasecmp(answer, "yes", sizeof(answer)))
return 1;
if (tolower(answer[0]) == 'n' && !answer[1])
return 0;
if (!strncasecmp(answer, "no", sizeof(answer)))
return 0;
/* did not find an answer we understand */
return -1;
}
static int ask_yes_no_if_possible(const char *format, va_list args)
{
char question[4096];
const char *retry_hook[] = { NULL, NULL, NULL };
vsnprintf(question, sizeof(question), format, args);
if ((retry_hook[0] = mingw_getenv("GIT_ASK_YESNO"))) {
retry_hook[1] = question;
return !run_command_v_opt(retry_hook, 0);
}
if (!isatty(_fileno(stdin)) || !isatty(_fileno(stderr)))
return 0;
while (1) {
int answer;
fprintf(stderr, "%s (y/n) ", question);
if ((answer = read_yes_no_answer()) >= 0)
return answer;
fprintf(stderr, "Sorry, I did not understand your answer. "
"Please type 'y' or 'n'\n");
}
}
static int retry_ask_yes_no(int *tries, const char *format, ...)
{
static const int delay[] = { 0, 1, 10, 20, 40 };
va_list args;
int result, saved_errno = errno;
if ((*tries) < ARRAY_SIZE(delay)) {
/*
* We assume that some other process had the file open at the wrong
* moment and retry. In order to give the other process a higher
* chance to complete its operation, we give up our time slice now.
* If we have to retry again, we do sleep a bit.
*/
Sleep(delay[*tries]);
(*tries)++;
return 1;
}
va_start(args, format);
result = ask_yes_no_if_possible(format, args);
va_end(args);
errno = saved_errno;
return result;
}
/* Windows only */
enum hide_dotfiles_type {
HIDE_DOTFILES_FALSE = 0,
HIDE_DOTFILES_TRUE,
HIDE_DOTFILES_DOTGITONLY
};
static enum hide_dotfiles_type hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
static char *unset_environment_variables;
int core_fscache;
int core_long_paths;
int mingw_core_config(const char *var, const char *value, void *cb)
{
if (!strcmp(var, "core.hidedotfiles")) {
if (value && !strcasecmp(value, "dotgitonly"))
hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
else
hide_dotfiles = git_config_bool(var, value);
return 0;
}
if (!strcmp(var, "core.fscache")) {
core_fscache = git_config_bool(var, value);
return 0;
}
if (!strcmp(var, "core.longpaths")) {
core_long_paths = git_config_bool(var, value);
return 0;
}
if (!strcmp(var, "core.unsetenvvars")) {
free(unset_environment_variables);
unset_environment_variables = xstrdup(value);
return 0;
}
return 0;
}
static DWORD symlink_file_flags = 0, symlink_directory_flags = 1;
enum phantom_symlink_result {
PHANTOM_SYMLINK_RETRY,
PHANTOM_SYMLINK_DONE,
PHANTOM_SYMLINK_DIRECTORY
};
static inline int is_wdir_sep(wchar_t wchar)
{
return wchar == L'/' || wchar == L'\\';
}
static const wchar_t *make_relative_to(const wchar_t *path,
const wchar_t *relative_to, wchar_t *out,
size_t size)
{
size_t i = wcslen(relative_to), len;
/* Is `path` already absolute? */
if (is_wdir_sep(path[0]) ||
(iswalpha(path[0]) && path[1] == L':' && is_wdir_sep(path[2])))
return path;
while (i > 0 && !is_wdir_sep(relative_to[i - 1]))
i--;
/* Is `relative_to` in the current directory? */
if (!i)
return path;
len = wcslen(path);
if (i + len + 1 > size) {
error("Could not make '%S' relative to '%S' (too large)",
path, relative_to);
return NULL;
}
memcpy(out, relative_to, i * sizeof(wchar_t));
wcscpy(out + i, path);
return out;
}
/*
* Changes a file symlink to a directory symlink if the target exists and is a
* directory.
*/
static enum phantom_symlink_result
process_phantom_symlink(const wchar_t *wtarget, const wchar_t *wlink)
{
HANDLE hnd;
BY_HANDLE_FILE_INFORMATION fdata;
wchar_t relative[MAX_LONG_PATH];
const wchar_t *rel;
/* check that wlink is still a file symlink */
if ((GetFileAttributesW(wlink)
& (FILE_ATTRIBUTE_REPARSE_POINT | FILE_ATTRIBUTE_DIRECTORY))
!= FILE_ATTRIBUTE_REPARSE_POINT)
return PHANTOM_SYMLINK_DONE;
/* make it relative, if necessary */
rel = make_relative_to(wtarget, wlink, relative, ARRAY_SIZE(relative));
if (!rel)
return PHANTOM_SYMLINK_DONE;
/* let Windows resolve the link by opening it */
hnd = CreateFileW(rel, 0,
FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL,
OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
if (hnd == INVALID_HANDLE_VALUE) {
errno = err_win_to_posix(GetLastError());
return PHANTOM_SYMLINK_RETRY;
}
if (!GetFileInformationByHandle(hnd, &fdata)) {
errno = err_win_to_posix(GetLastError());
CloseHandle(hnd);
return PHANTOM_SYMLINK_RETRY;
}
CloseHandle(hnd);
/* if target exists and is a file, we're done */
if (!(fdata.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY))
return PHANTOM_SYMLINK_DONE;
/* otherwise recreate the symlink with directory flag */
if (DeleteFileW(wlink) &&
CreateSymbolicLinkW(wlink, wtarget, symlink_directory_flags))
return PHANTOM_SYMLINK_DIRECTORY;
errno = err_win_to_posix(GetLastError());
return PHANTOM_SYMLINK_RETRY;
}
/* keep track of newly created symlinks to non-existing targets */
struct phantom_symlink_info {
struct phantom_symlink_info *next;
wchar_t *wlink;
wchar_t *wtarget;
};
static struct phantom_symlink_info *phantom_symlinks = NULL;
static CRITICAL_SECTION phantom_symlinks_cs;
static void process_phantom_symlinks(void)
{
struct phantom_symlink_info *current, **psi;
EnterCriticalSection(&phantom_symlinks_cs);
/* process phantom symlinks list */
psi = &phantom_symlinks;
while ((current = *psi)) {
enum phantom_symlink_result result = process_phantom_symlink(
current->wtarget, current->wlink);
if (result == PHANTOM_SYMLINK_RETRY) {
psi = &current->next;
} else {
/* symlink was processed, remove from list */
*psi = current->next;
free(current);
/* if symlink was a directory, start over */
if (result == PHANTOM_SYMLINK_DIRECTORY)
psi = &phantom_symlinks;
}
}
LeaveCriticalSection(&phantom_symlinks_cs);
}
/* Normalizes NT paths as returned by some low-level APIs. */
static wchar_t *normalize_ntpath(wchar_t *wbuf)
{
int i;
/* fix absolute path prefixes */
if (wbuf[0] == '\\') {
/* strip NT namespace prefixes */
if (!wcsncmp(wbuf, L"\\??\\", 4) ||
!wcsncmp(wbuf, L"\\\\?\\", 4))
wbuf += 4;
else if (!wcsnicmp(wbuf, L"\\DosDevices\\", 12))
wbuf += 12;
/* replace remaining '...UNC\' with '\\' */
if (!wcsnicmp(wbuf, L"UNC\\", 4)) {
wbuf += 2;
*wbuf = '\\';
}
}
/* convert backslashes to slashes */
for (i = 0; wbuf[i]; i++)
if (wbuf[i] == '\\')
wbuf[i] = '/';
return wbuf;
}
int mingw_unlink(const char *pathname)
{
int tries = 0;
wchar_t wpathname[MAX_LONG_PATH];
if (xutftowcs_long_path(wpathname, pathname) < 0)
return -1;
do {
/* read-only files cannot be removed */
_wchmod(wpathname, 0666);
if (!_wunlink(wpathname))
return 0;
if (!is_file_in_use_error(GetLastError()))
break;
/*
* _wunlink() / DeleteFileW() for directory symlinks fails with
* ERROR_ACCESS_DENIED (EACCES), so try _wrmdir() as well. This is the
* same error we get if a file is in use (already checked above).
*/
if (!_wrmdir(wpathname))
return 0;
} while (retry_ask_yes_no(&tries, "Unlink of file '%s' failed. "
"Should I try again?", pathname));
return -1;
}
static int is_dir_empty(const wchar_t *wpath)
{
WIN32_FIND_DATAW findbuf;
HANDLE handle;
wchar_t wbuf[MAX_LONG_PATH + 2];
wcscpy(wbuf, wpath);
wcscat(wbuf, L"\\*");
handle = FindFirstFileW(wbuf, &findbuf);
if (handle == INVALID_HANDLE_VALUE)
return GetLastError() == ERROR_NO_MORE_FILES;
while (!wcscmp(findbuf.cFileName, L".") ||
!wcscmp(findbuf.cFileName, L".."))
if (!FindNextFileW(handle, &findbuf)) {
DWORD err = GetLastError();
FindClose(handle);
return err == ERROR_NO_MORE_FILES;
}
FindClose(handle);
return 0;
}
int mingw_rmdir(const char *pathname)
{
int tries = 0;
wchar_t wpathname[MAX_LONG_PATH];
if (xutftowcs_long_path(wpathname, pathname) < 0)
return -1;
do {
if (!_wrmdir(wpathname))
return 0;
if (!is_file_in_use_error(GetLastError()))
errno = err_win_to_posix(GetLastError());
if (errno != EACCES)
break;
if (!is_dir_empty(wpathname)) {
errno = ENOTEMPTY;
break;
}
} while (retry_ask_yes_no(&tries, "Deletion of directory '%s' failed. "
"Should I try again?", pathname));
return -1;
}
static inline int needs_hiding(const char *path)
{
const char *basename;
if (hide_dotfiles == HIDE_DOTFILES_FALSE)
return 0;
/* We cannot use basename(), as it would remove trailing slashes */
mingw_skip_dos_drive_prefix((char **)&path);
if (!*path)
return 0;
for (basename = path; *path; path++)
if (is_dir_sep(*path)) {
do {
path++;
} while (is_dir_sep(*path));
/* ignore trailing slashes */
if (*path)
basename = path;
}
if (hide_dotfiles == HIDE_DOTFILES_TRUE)
return *basename == '.';
assert(hide_dotfiles == HIDE_DOTFILES_DOTGITONLY);
return !strncasecmp(".git", basename, 4) &&
(!basename[4] || is_dir_sep(basename[4]));
}
static int set_hidden_flag(const wchar_t *path, int set)
{
DWORD original = GetFileAttributesW(path), modified;
if (set)
modified = original | FILE_ATTRIBUTE_HIDDEN;
else
modified = original & ~FILE_ATTRIBUTE_HIDDEN;
if (original == modified || SetFileAttributesW(path, modified))
return 0;
errno = err_win_to_posix(GetLastError());
return -1;
}
int mingw_mkdir(const char *path, int mode)
{
int ret;
wchar_t wpath[MAX_LONG_PATH];
/* CreateDirectoryW path limit is 248 (MAX_PATH - 8.3 file name) */
if (xutftowcs_path_ex(wpath, path, MAX_LONG_PATH, -1, 248,
core_long_paths) < 0)
return -1;
ret = _wmkdir(wpath);
if (!ret)
process_phantom_symlinks();
if (!ret && needs_hiding(path))
return set_hidden_flag(wpath, 1);
return ret;
}
static int mingw_open_append(wchar_t const *wfilename, int oflags, ...)
{
HANDLE handle;
int fd;
DWORD create = (oflags & O_CREAT) ? OPEN_ALWAYS : OPEN_EXISTING;
/* only these flags are supported */
if ((oflags & ~O_CREAT) != (O_WRONLY | O_APPEND))
return errno = ENOSYS, -1;
/*
* FILE_SHARE_WRITE is required to permit child processes
* to append to the file.
*/
handle = CreateFileW(wfilename, FILE_APPEND_DATA,
FILE_SHARE_WRITE | FILE_SHARE_READ,
NULL, create, FILE_ATTRIBUTE_NORMAL, NULL);
if (handle == INVALID_HANDLE_VALUE)
return errno = err_win_to_posix(GetLastError()), -1;
/*
* No O_APPEND here, because the CRT uses it only to reset the
* file pointer to EOF on write(); but that is not necessary
* for a file created with FILE_APPEND_DATA.
*/
fd = _open_osfhandle((intptr_t)handle, O_BINARY);
if (fd < 0)
CloseHandle(handle);
return fd;
}
int mingw_open (const char *filename, int oflags, ...)
{
typedef int (*open_fn_t)(wchar_t const *wfilename, int oflags, ...);
va_list args;
unsigned mode;
int fd;
wchar_t wfilename[MAX_LONG_PATH];
open_fn_t open_fn;
va_start(args, oflags);
mode = va_arg(args, int);
va_end(args);
if (filename && !strcmp(filename, "/dev/null"))
filename = "nul";
if (oflags & O_APPEND)
open_fn = mingw_open_append;
else
open_fn = _wopen;
if (xutftowcs_long_path(wfilename, filename) < 0)
return -1;
fd = open_fn(wfilename, oflags, mode);
if (fd < 0 && (oflags & O_ACCMODE) != O_RDONLY && errno == EACCES) {
DWORD attrs = GetFileAttributesW(wfilename);
if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
errno = EISDIR;
}
if ((oflags & O_CREAT) && needs_hiding(filename)) {
/*
* Internally, _wopen() uses the CreateFile() API which errors
* out with an ERROR_ACCESS_DENIED if CREATE_ALWAYS was
* specified and an already existing file's attributes do not
* match *exactly*. As there is no mode or flag we can set that
* would correspond to FILE_ATTRIBUTE_HIDDEN, let's just try
* again *without* the O_CREAT flag (that corresponds to the
* CREATE_ALWAYS flag of CreateFile()).
*/
if (fd < 0 && errno == EACCES)
fd = open_fn(wfilename, oflags & ~O_CREAT, mode);
if (fd >= 0 && set_hidden_flag(wfilename, 1))
warning("could not mark '%s' as hidden.", filename);
}
return fd;
}
static BOOL WINAPI ctrl_ignore(DWORD type)
{
return TRUE;
}
#undef fgetc
int mingw_fgetc(FILE *stream)
{
int ch;
if (!isatty(_fileno(stream)))
return fgetc(stream);
SetConsoleCtrlHandler(ctrl_ignore, TRUE);
while (1) {
ch = fgetc(stream);
if (ch != EOF || GetLastError() != ERROR_OPERATION_ABORTED)
break;
/* Ctrl+C was pressed, simulate SIGINT and retry */
mingw_raise(SIGINT);
}
SetConsoleCtrlHandler(ctrl_ignore, FALSE);
return ch;
}
#undef fopen
FILE *mingw_fopen (const char *filename, const char *otype)
{
int hide = needs_hiding(filename);
FILE *file;
wchar_t wfilename[MAX_LONG_PATH], wotype[4];
if (filename && !strcmp(filename, "/dev/null"))
filename = "nul";
if (xutftowcs_long_path(wfilename, filename) < 0 ||
xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
return NULL;
if (hide && !access(filename, F_OK) && set_hidden_flag(wfilename, 0)) {
error("could not unhide %s", filename);
return NULL;
}
file = _wfopen(wfilename, wotype);
if (!file && GetLastError() == ERROR_INVALID_NAME)
errno = ENOENT;
if (file && hide && set_hidden_flag(wfilename, 1))
warning("could not mark '%s' as hidden.", filename);
return file;
}
FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
{
int hide = needs_hiding(filename);
FILE *file;
wchar_t wfilename[MAX_LONG_PATH], wotype[4];
if (filename && !strcmp(filename, "/dev/null"))
filename = "nul";
if (xutftowcs_long_path(wfilename, filename) < 0 ||
xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
return NULL;
if (hide && !access(filename, F_OK) && set_hidden_flag(wfilename, 0)) {
error("could not unhide %s", filename);
return NULL;
}
file = _wfreopen(wfilename, wotype, stream);
if (file && hide && set_hidden_flag(wfilename, 1))
warning("could not mark '%s' as hidden.", filename);
return file;
}
#undef fflush
int mingw_fflush(FILE *stream)
{
int ret = fflush(stream);
/*
* write() is used behind the scenes of stdio output functions.
* Since git code does not check for errors after each stdio write
* operation, it can happen that write() is called by a later
* stdio function even if an earlier write() call failed. In the
* case of a pipe whose readable end was closed, only the first
* call to write() reports EPIPE on Windows. Subsequent write()
* calls report EINVAL. It is impossible to notice whether this
* fflush invocation triggered such a case, therefore, we have to
* catch all EINVAL errors whole-sale.
*/
if (ret && errno == EINVAL)
errno = EPIPE;
return ret;
}
#undef write
ssize_t mingw_write(int fd, const void *buf, size_t len)
{
ssize_t result = write(fd, buf, len);
if (result < 0 && errno == EINVAL && buf) {
/* check if fd is a pipe */
HANDLE h = (HANDLE) _get_osfhandle(fd);
if (GetFileType(h) == FILE_TYPE_PIPE)
errno = EPIPE;
else
errno = EINVAL;
}
return result;
}
int mingw_access(const char *filename, int mode)
{
wchar_t wfilename[MAX_LONG_PATH];
if (xutftowcs_long_path(wfilename, filename) < 0)
return -1;
/* X_OK is not supported by the MSVCRT version */
return _waccess(wfilename, mode & ~X_OK);
}
/* cached length of current directory for handle_long_path */
static int current_directory_len = 0;
int mingw_chdir(const char *dirname)
{
int result;
DECLARE_PROC_ADDR(kernel32.dll, DWORD, GetFinalPathNameByHandleW,
HANDLE, LPWSTR, DWORD, DWORD);
wchar_t wdirname[MAX_LONG_PATH];
if (xutftowcs_long_path(wdirname, dirname) < 0)
return -1;
if (has_symlinks && INIT_PROC_ADDR(GetFinalPathNameByHandleW)) {
HANDLE hnd = CreateFileW(wdirname, 0,
FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL,
OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
if (hnd == INVALID_HANDLE_VALUE) {
errno = err_win_to_posix(GetLastError());
return -1;
}
if (!GetFinalPathNameByHandleW(hnd, wdirname, ARRAY_SIZE(wdirname), 0)) {
errno = err_win_to_posix(GetLastError());
CloseHandle(hnd);
return -1;
}
CloseHandle(hnd);
}
result = _wchdir(normalize_ntpath(wdirname));
current_directory_len = GetCurrentDirectoryW(0, NULL);
return result;
}
int mingw_chmod(const char *filename, int mode)
{
wchar_t wfilename[MAX_LONG_PATH];
if (xutftowcs_long_path(wfilename, filename) < 0)
return -1;
return _wchmod(wfilename, mode);
}
/**
* Verifies that safe_create_leading_directories() would succeed.
*/
static int has_valid_directory_prefix(wchar_t *wfilename)
{
int n = wcslen(wfilename);
while (n > 0) {
wchar_t c = wfilename[--n];
DWORD attributes;
if (!is_dir_sep(c))
continue;
wfilename[n] = L'\0';
attributes = GetFileAttributesW(wfilename);
wfilename[n] = c;
if (attributes == FILE_ATTRIBUTE_DIRECTORY ||
attributes == FILE_ATTRIBUTE_DEVICE)
return 1;
if (attributes == INVALID_FILE_ATTRIBUTES)
switch (GetLastError()) {
case ERROR_PATH_NOT_FOUND:
continue;
case ERROR_FILE_NOT_FOUND:
/* This implies parent directory exists. */
return 1;
}
return 0;
}
return 1;
}
int mingw_lstat(const char *file_name, struct stat *buf)
{
WIN32_FILE_ATTRIBUTE_DATA fdata;
WIN32_FIND_DATAW findbuf;
wchar_t wfilename[MAX_LONG_PATH];
int wlen = xutftowcs_long_path(wfilename, file_name);
if (wlen < 0)
return -1;
/* strip trailing '/', or GetFileAttributes will fail */
while (wlen && is_dir_sep(wfilename[wlen - 1]))
wfilename[--wlen] = 0;
if (!wlen) {
errno = ENOENT;
return -1;
}
if (GetFileAttributesExW(wfilename, GetFileExInfoStandard, &fdata)) {
/* for reparse points, use FindFirstFile to get the reparse tag */
if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
HANDLE handle = FindFirstFileW(wfilename, &findbuf);
if (handle == INVALID_HANDLE_VALUE)
goto error;
FindClose(handle);
}
buf->st_ino = 0;
buf->st_gid = 0;
buf->st_uid = 0;
buf->st_nlink = 1;
buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes,
findbuf.dwReserved0);
buf->st_size = S_ISLNK(buf->st_mode) ? MAX_LONG_PATH :
fdata.nFileSizeLow | (((off_t) fdata.nFileSizeHigh) << 32);
buf->st_dev = buf->st_rdev = 0; /* not used by Git */
filetime_to_timespec(&(fdata.ftLastAccessTime), &(buf->st_atim));
filetime_to_timespec(&(fdata.ftLastWriteTime), &(buf->st_mtim));
filetime_to_timespec(&(fdata.ftCreationTime), &(buf->st_ctim));
return 0;
}
error:
switch (GetLastError()) {
case ERROR_ACCESS_DENIED:
case ERROR_SHARING_VIOLATION:
case ERROR_LOCK_VIOLATION:
case ERROR_SHARING_BUFFER_EXCEEDED:
errno = EACCES;
break;
case ERROR_BUFFER_OVERFLOW:
errno = ENAMETOOLONG;
break;
case ERROR_NOT_ENOUGH_MEMORY:
errno = ENOMEM;
break;
case ERROR_PATH_NOT_FOUND:
if (!has_valid_directory_prefix(wfilename)) {
errno = ENOTDIR;
break;
}
/* fallthru */
default:
errno = ENOENT;
break;
}
return -1;
}
int (*lstat)(const char *file_name, struct stat *buf) = mingw_lstat;
static int get_file_info_by_handle(HANDLE hnd, struct stat *buf)
{
BY_HANDLE_FILE_INFORMATION fdata;
if (!GetFileInformationByHandle(hnd, &fdata)) {
errno = err_win_to_posix(GetLastError());
return -1;
}
buf->st_ino = 0;
buf->st_dev = buf->st_rdev = 0; /* not used by Git */
buf->st_gid = buf->st_uid = 0;
buf->st_nlink = 1;
buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes, 0);
buf->st_size = fdata.nFileSizeLow | (((off_t) fdata.nFileSizeHigh) << 32);
filetime_to_timespec(&(fdata.ftLastAccessTime), &(buf->st_atim));
filetime_to_timespec(&(fdata.ftLastWriteTime), &(buf->st_mtim));
filetime_to_timespec(&(fdata.ftCreationTime), &(buf->st_ctim));
return 0;
}
int mingw_stat(const char *file_name, struct stat *buf)
{
wchar_t wfile_name[MAX_LONG_PATH];
HANDLE hnd;
int result;
/* open the file and let Windows resolve the links */
if (xutftowcs_long_path(wfile_name, file_name) < 0)
return -1;
hnd = CreateFileW(wfile_name, 0,
FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL,
OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
if (hnd == INVALID_HANDLE_VALUE) {
errno = err_win_to_posix(GetLastError());
return -1;
}
result = get_file_info_by_handle(hnd, buf);
CloseHandle(hnd);
return result;
}
int mingw_fstat(int fd, struct stat *buf)
{
HANDLE fh = (HANDLE)_get_osfhandle(fd);
DWORD avail, type = GetFileType(fh) & ~FILE_TYPE_REMOTE;
switch (type) {
case FILE_TYPE_DISK:
return get_file_info_by_handle(fh, buf);
case FILE_TYPE_CHAR:
case FILE_TYPE_PIPE:
/* initialize stat fields */
memset(buf, 0, sizeof(*buf));
buf->st_nlink = 1;
if (type == FILE_TYPE_CHAR) {
buf->st_mode = _S_IFCHR;
} else {
buf->st_mode = _S_IFIFO;
if (PeekNamedPipe(fh, NULL, 0, NULL, &avail, NULL))
buf->st_size = avail;
}
return 0;
default:
errno = EBADF;
return -1;
}
}
static inline void time_t_to_filetime(time_t t, FILETIME *ft)
{
long long winTime = t * 10000000LL + 116444736000000000LL;
ft->dwLowDateTime = winTime;
ft->dwHighDateTime = winTime >> 32;
}
int mingw_utime (const char *file_name, const struct utimbuf *times)
{
FILETIME mft, aft;
int fh, rc;
DWORD attrs;
wchar_t wfilename[MAX_LONG_PATH];
if (xutftowcs_long_path(wfilename, file_name) < 0)
return -1;
/* must have write permission */
attrs = GetFileAttributesW(wfilename);
if (attrs != INVALID_FILE_ATTRIBUTES &&
(attrs & FILE_ATTRIBUTE_READONLY)) {
/* ignore errors here; open() will report them */
SetFileAttributesW(wfilename, attrs & ~FILE_ATTRIBUTE_READONLY);
}
if ((fh = _wopen(wfilename, O_RDWR | O_BINARY)) < 0) {
rc = -1;
goto revert_attrs;
}
if (times) {
time_t_to_filetime(times->modtime, &mft);
time_t_to_filetime(times->actime, &aft);
} else {
GetSystemTimeAsFileTime(&mft);
aft = mft;
}
if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
errno = EINVAL;
rc = -1;
} else
rc = 0;
close(fh);
revert_attrs:
if (attrs != INVALID_FILE_ATTRIBUTES &&
(attrs & FILE_ATTRIBUTE_READONLY)) {
/* ignore errors again */
SetFileAttributesW(wfilename, attrs);
}
return rc;
}
#undef strftime
size_t mingw_strftime(char *s, size_t max,
const char *format, const struct tm *tm)
{
size_t ret = strftime(s, max, format, tm);
if (!ret && errno == EINVAL)
die("invalid strftime format: '%s'", format);
return ret;
}
unsigned int sleep (unsigned int seconds)
{
Sleep(seconds*1000);
return 0;
}
char *mingw_mktemp(char *template)
{
wchar_t wtemplate[MAX_PATH];
int offset = 0;
/* we need to return the path, thus no long paths here! */
if (xutftowcs_path(wtemplate, template) < 0)
return NULL;
if (is_dir_sep(template[0]) && !is_dir_sep(template[1]) &&
iswalpha(wtemplate[0]) && wtemplate[1] == L':') {
/* We have an absolute path missing the drive prefix */
offset = 2;
}
if (!_wmktemp(wtemplate))
return NULL;
if (xwcstoutf(template, wtemplate + offset, strlen(template) + 1) < 0)
return NULL;
return template;
}
int mkstemp(char *template)
{
char *filename = mktemp(template);
if (filename == NULL)
return -1;
return open(filename, O_RDWR | O_CREAT, 0600);
}
int gettimeofday(struct timeval *tv, void *tz)
{
FILETIME ft;
long long hnsec;
GetSystemTimeAsFileTime(&ft);
hnsec = filetime_to_hnsec(&ft);
tv->tv_sec = hnsec / 10000000;
tv->tv_usec = (hnsec % 10000000) / 10;
return 0;
}
int pipe(int filedes[2])
{
HANDLE h[2];
/* this creates non-inheritable handles */
if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
errno = err_win_to_posix(GetLastError());
return -1;
}
filedes[0] = _open_osfhandle(HCAST(int, h[0]), O_NOINHERIT);
if (filedes[0] < 0) {
CloseHandle(h[0]);
CloseHandle(h[1]);
return -1;
}
filedes[1] = _open_osfhandle(HCAST(int, h[1]), O_NOINHERIT);
if (filedes[1] < 0) {
close(filedes[0]);
CloseHandle(h[1]);
return -1;
}
return 0;
}
struct tm *gmtime_r(const time_t *timep, struct tm *result)
{
/* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
memcpy(result, gmtime(timep), sizeof(struct tm));
return result;
}
struct tm *localtime_r(const time_t *timep, struct tm *result)
{
/* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
memcpy(result, localtime(timep), sizeof(struct tm));
return result;
}
char *mingw_getcwd(char *pointer, int len)
{
wchar_t cwd[MAX_PATH], wpointer[MAX_PATH];
DECLARE_PROC_ADDR(kernel32.dll, DWORD, GetFinalPathNameByHandleW,
HANDLE, LPWSTR, DWORD, DWORD);
DWORD ret = GetCurrentDirectoryW(ARRAY_SIZE(cwd), cwd);
if (!ret || ret >= ARRAY_SIZE(cwd)) {
errno = ret ? ENAMETOOLONG : err_win_to_posix(GetLastError());
return NULL;
}
ret = GetLongPathNameW(cwd, wpointer, ARRAY_SIZE(wpointer));
if (!ret && GetLastError() == ERROR_ACCESS_DENIED &&
INIT_PROC_ADDR(GetFinalPathNameByHandleW)) {
HANDLE hnd = CreateFileW(cwd, 0,
FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL,
OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
if (hnd == INVALID_HANDLE_VALUE)
return NULL;
ret = GetFinalPathNameByHandleW(hnd, wpointer, ARRAY_SIZE(wpointer), 0);
CloseHandle(hnd);
if (!ret || ret >= ARRAY_SIZE(wpointer))
return NULL;
if (xwcstoutf(pointer, normalize_ntpath(wpointer), len) < 0)
return NULL;
return pointer;
}
if (!ret || ret >= ARRAY_SIZE(wpointer))
return NULL;
if (xwcstoutf(pointer, wpointer, len) < 0)
return NULL;
convert_slashes(pointer);
return pointer;
}
/*
* See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
* (Parsing C++ Command-Line Arguments)
*/
static const char *quote_arg_msvc(const char *arg)
{
/* count chars to quote */
int len = 0, n = 0;
int force_quotes = 0;
char *q, *d;
const char *p = arg;
if (!*p) force_quotes = 1;
while (*p) {
if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
force_quotes = 1;
else if (*p == '"')
n++;
else if (*p == '\\') {
int count = 0;
while (*p == '\\') {
count++;
p++;
len++;
}
if (*p == '"')
n += count*2 + 1;
continue;
}
len++;
p++;
}
if (!force_quotes && n == 0)
return arg;
/* insert \ where necessary */
d = q = xmalloc(st_add3(len, n, 3));
*d++ = '"';
while (*arg) {
if (*arg == '"')
*d++ = '\\';
else if (*arg == '\\') {
int count = 0;
while (*arg == '\\') {
count++;
*d++ = *arg++;
}
if (*arg == '"') {
while (count-- > 0)
*d++ = '\\';
*d++ = '\\';
}
}
*d++ = *arg++;
}
*d++ = '"';
*d++ = 0;
return q;
}
#include "quote.h"
static const char *quote_arg_msys2(const char *arg)
{
struct strbuf buf = STRBUF_INIT;
const char *p2 = arg, *p;
for (p = arg; *p; p++) {
int ws = isspace(*p);
if (!ws && *p != '\\' && *p != '"' && *p != '{')
continue;
if (!buf.len)
strbuf_addch(&buf, '"');
if (p != p2)
strbuf_add(&buf, p2, p - p2);
if (!ws && *p != '{')
strbuf_addch(&buf, '\\');
p2 = p;
}
if (p == arg)
strbuf_addch(&buf, '"');
else if (!buf.len)
return arg;
else
strbuf_add(&buf, p2, p - p2),
strbuf_addch(&buf, '"');
return strbuf_detach(&buf, 0);
}
static const char *parse_interpreter(const char *cmd)
{
static char buf[100];
char *p, *opt;
int n, fd;
/* don't even try a .exe */
n = strlen(cmd);
if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
return NULL;
fd = open(cmd, O_RDONLY);
if (fd < 0)
return NULL;
n = read(fd, buf, sizeof(buf)-1);
close(fd);
if (n < 4) /* at least '#!/x' and not error */
return NULL;
if (buf[0] != '#' || buf[1] != '!')
return NULL;
buf[n] = '\0';
p = buf + strcspn(buf, "\r\n");
if (!*p)
return NULL;
*p = '\0';
if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
return NULL;
/* strip options */
if ((opt = strchr(p+1, ' ')))
*opt = '\0';
return p+1;
}
/*
* exe_only means that we only want to detect .exe files, but not scripts
* (which do not have an extension)
*/
static char *lookup_prog(const char *dir, int dirlen, const char *cmd,
int isexe, int exe_only)
{
char path[MAX_PATH];
wchar_t wpath[MAX_PATH];
snprintf(path, sizeof(path), "%.*s\\%s.exe", dirlen, dir, cmd);
if (xutftowcs_path(wpath, path) < 0)
return NULL;
if (!isexe && _waccess(wpath, F_OK) == 0)
return xstrdup(path);
wpath[wcslen(wpath)-4] = '\0';
if ((!exe_only || isexe) && _waccess(wpath, F_OK) == 0) {
if (!(GetFileAttributesW(wpath) & FILE_ATTRIBUTE_DIRECTORY)) {
path[strlen(path)-4] = '\0';
return xstrdup(path);
}
}
return NULL;
}
static char *path_lookup(const char *cmd, int exe_only);
static char *is_busybox_applet(const char *cmd)
{
static struct string_list applets = STRING_LIST_INIT_DUP;
static char *busybox_path;
static int busybox_path_initialized;
/* Avoid infinite loop */
if (!strncasecmp(cmd, "busybox", 7) &&
(!cmd[7] || !strcasecmp(cmd + 7, ".exe")))
return NULL;
if (!busybox_path_initialized) {
busybox_path = path_lookup("busybox.exe", 1);
busybox_path_initialized = 1;
}
/* Assume that sh is compiled in... */
if (!busybox_path || !strcasecmp(cmd, "sh"))
return xstrdup_or_null(busybox_path);
if (!applets.nr) {
struct child_process cp = CHILD_PROCESS_INIT;
struct strbuf buf = STRBUF_INIT;
char *p;
argv_array_pushl(&cp.args, busybox_path, "--help", NULL);
if (capture_command(&cp, &buf, 2048)) {
string_list_append(&applets, "");
return NULL;
}
/* parse output */
p = strstr(buf.buf, "Currently defined functions:\n");
if (!p) {
warning("Could not parse output of busybox --help");
string_list_append(&applets, "");
return NULL;
}
p = strchrnul(p, '\n');
for (;;) {
size_t len;
p += strspn(p, "\n\t ,");
len = strcspn(p, "\n\t ,");
if (!len)
break;
p[len] = '\0';
string_list_insert(&applets, p);
p = p + len + 1;
}
}
return string_list_has_string(&applets, cmd) ?
xstrdup(busybox_path) : NULL;
}
/*
* Determines the absolute path of cmd using the split path in path.
* If cmd contains a slash or backslash, no lookup is performed.
*/
static char *path_lookup(const char *cmd, int exe_only)
{
const char *path;
char *prog = NULL;
int len = strlen(cmd);
int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
if (strchr(cmd, '/') || strchr(cmd, '\\'))
return xstrdup(cmd);
path = mingw_getenv("PATH");
if (!path)
return NULL;
while (!prog) {
const char *sep = strchrnul(path, ';');
int dirlen = sep - path;
if (dirlen)
prog = lookup_prog(path, dirlen, cmd, isexe, exe_only);
if (!*sep)
break;
path = sep + 1;
}
if (!prog && !isexe)
prog = is_busybox_applet(cmd);
return prog;
}
#if defined(_MSC_VER)
/* We need a stable sort */
#ifndef INTERNAL_QSORT
#include "qsort.c"
#endif
/* Compare only keys */
static int wenvcmp(const void *a, const void *b)
{
wchar_t *p = *(wchar_t **)a, *q = *(wchar_t **)b;
size_t p_len, q_len;
int ret;
/* Find end of keys */
for (p_len = 0; p[p_len] && p[p_len] != L'='; p_len++)
; /* do nothing */
for (q_len = 0; q[q_len] && q[q_len] != L'='; q_len++)
; /* do nothing */
/* Are keys identical (modulo case)? */
if (p_len == q_len && !_wcsnicmp(p, q, p_len))
return 0;
ret = _wcsnicmp(p, q, p_len < q_len ? p_len : q_len);
return ret ? ret : (p_len < q_len ? -1 : +1);
}
/*
* Build an environment block combining the inherited environment
* merged with the given list of settings.
*
* Values of the form "KEY=VALUE" in deltaenv override inherited values.
* Values of the form "KEY" in deltaenv delete inherited values.
*
* Multiple entries in deltaenv for the same key are explicitly allowed.
*
* We return a contiguous block of UNICODE strings with a final trailing
* zero word.
*/
static wchar_t *make_environment_block(char **deltaenv)
{
/*
* The CRT (at least as of UCRT) secretly declares "_wenviron"
* as a function that returns a pointer to a mostly static table.
* Grab the pointer and cache it for the duration of our loop.
*/
const wchar_t *wenv = GetEnvironmentStringsW(), *p;
size_t delta_size = 0, size = 1; /* for extra NUL at the end */
wchar_t **array = NULL;
size_t alloc = 0, nr = 0, i;
const char *p2;
wchar_t *wdeltaenv;
wchar_t *result, *p3;
/*
* If there is no deltaenv to apply, simply return a copy
*/
if (!deltaenv || !*deltaenv) {
for (p = wenv; p && *p; ) {
size_t s = wcslen(p) + 1;
size += s;
p += s;
}
ALLOC_ARRAY(result, size);
memcpy(result, wenv, size * sizeof(*wenv));
FreeEnvironmentStringsW(wenv);
return result;
}
/*
* If there is a deltaenv, let's accumulate all keys into `array`,
* sort them using the stable git_qsort() and then copy, skipping
* duplicate keys
*/
for (p = wenv; p && *p; ) {
size_t s = wcslen(p) + 1;
size += s;
ALLOC_GROW(array, nr + 1, alloc);
array[nr++] = p;
p += s;
}
/* (over-)assess size needed for wchar version of deltaenv */
for (i = 0; deltaenv[i]; i++) {
size_t s = strlen(deltaenv[i]) + 1;
delta_size += s;
}
ALLOC_ARRAY(wdeltaenv, delta_size);
/* convert the deltaenv, appending to array */
for (i = 0, p3 = wdeltaenv; deltaenv[i]; i++) {
size_t s = strlen(deltaenv[i]) + 1, wlen;
wlen = xutftowcs(p3, deltaenv[i], s * 2);
ALLOC_GROW(array, nr + 1, alloc);
array[nr++] = p3;
p3 += wlen + 1;
}
git_qsort(array, nr, sizeof(*array), wenvcmp);
ALLOC_ARRAY(result, size + delta_size);
for (p3 = result, i = 0; i < nr; i++) {
wchar_t *equal = wcschr(array[i], L'=');;
/* Skip "to delete" entry */
if (!equal)
continue;
p = array[i];
/* Skip any duplicate */
if (i + 1 < nr) {
wchar_t *next = array[i + 1];
size_t n = equal - p;
if (!_wcsnicmp(p, next, n) && (!next[n] || next[n] == L'='))
continue;
}
size = wcslen(p) + 1;
memcpy(p3, p, size * sizeof(*p));
p3 += size;
}
*p3 = L'\0';
free(array);
FreeEnvironmentStringsW(wenv);
return result;
}
#else
static int do_putenv(char **env, const char *name, int size, int free_old);
/* used number of elements of environ array, including terminating NULL */
static int environ_size = 0;
/* allocated size of environ array, in bytes */
static int environ_alloc = 0;
/* used as a indicator when the environment has been changed outside mingw.c */
static char **saved_environ;
static void maybe_reinitialize_environ(void);
/*
* Create environment block suitable for CreateProcess. Merges current
* process environment and the supplied environment changes.
*/
static wchar_t *make_environment_block(char **deltaenv)
{
wchar_t *wenvblk = NULL;
char **tmpenv;
int i = 0, size, wenvsz = 0, wenvpos = 0;
maybe_reinitialize_environ();
size = environ_size;
while (deltaenv && deltaenv[i] && *deltaenv[i])
i++;
/* copy the environment, leaving space for changes */
ALLOC_ARRAY(tmpenv, size + i);
memcpy(tmpenv, environ, size * sizeof(char*));
/* merge supplied environment changes into the temporary environment */
for (i = 0; deltaenv && deltaenv[i] && *deltaenv[i]; i++)
size = do_putenv(tmpenv, deltaenv[i], size, 0);
/* create environment block from temporary environment */
for (i = 0; tmpenv[i] && *tmpenv[i]; i++) {
size = 2 * strlen(tmpenv[i]) + 2; /* +2 for final \0 */
ALLOC_GROW(wenvblk, (wenvpos + size) * sizeof(wchar_t), wenvsz);
wenvpos += xutftowcs(&wenvblk[wenvpos], tmpenv[i], size) + 1;
}
/* add final \0 terminator */
wenvblk[wenvpos] = 0;
free(tmpenv);
return wenvblk;
}
#endif
static void do_unset_environment_variables(void)
{
static int done;
char *p = unset_environment_variables;
if (done || !p)
return;
done = 1;
for (;;) {
char *comma = strchr(p, ',');
if (comma)
*comma = '\0';
unsetenv(p);
if (!comma)
break;
p = comma + 1;
}
}
struct pinfo_t {
struct pinfo_t *next;
pid_t pid;
HANDLE proc;
};
static struct pinfo_t *pinfo = NULL;
CRITICAL_SECTION pinfo_cs;
static int is_msys2_sh(const char *cmd)
{
if (cmd && !strcmp(cmd, "sh")) {
static int ret = -1;
char *p;
if (ret >= 0)
return ret;
p = path_lookup(cmd, 0);
if (!p)
ret = 0;
else {
size_t len = strlen(p);
ret = len > 15 &&
is_dir_sep(p[len - 15]) &&
!strncasecmp(p + len - 14, "usr", 3) &&
is_dir_sep(p[len - 11]) &&
!strncasecmp(p + len - 10, "bin", 3) &&
is_dir_sep(p[len - 7]) &&
!strcasecmp(p + len - 6, "sh.exe");
free(p);
}
return ret;
}
return 0;
}
static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **deltaenv,
const char *dir, const char *prepend_cmd,
int fhin, int fhout, int fherr)
{
static int restrict_handle_inheritance = 1;
STARTUPINFOEXW si;
PROCESS_INFORMATION pi;
LPPROC_THREAD_ATTRIBUTE_LIST attr_list = NULL;
HANDLE stdhandles[3];
DWORD stdhandles_count = 0;
SIZE_T size;
struct strbuf args;
wchar_t wcmd[MAX_PATH], wdir[MAX_PATH], *wargs, *wenvblk = NULL;
unsigned flags = CREATE_UNICODE_ENVIRONMENT;
BOOL ret;
HANDLE cons;
const char *strace_env;
const char *(*quote_arg)(const char *arg) =
is_msys2_sh(*argv) ? quote_arg_msys2 : quote_arg_msvc;
do_unset_environment_variables();
/* Determine whether or not we are associated to a console */
cons = CreateFile("CONOUT$", GENERIC_WRITE,
FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL, NULL);
if (cons == INVALID_HANDLE_VALUE) {
/* There is no console associated with this process.
* Since the child is a console process, Windows
* would normally create a console window. But
* since we'll be redirecting std streams, we do
* not need the console.
* It is necessary to use DETACHED_PROCESS
* instead of CREATE_NO_WINDOW to make ssh
* recognize that it has no console.
*/
flags |= DETACHED_PROCESS;
} else {
/* There is already a console. If we specified
* DETACHED_PROCESS here, too, Windows would
* disassociate the child from the console.
* The same is true for CREATE_NO_WINDOW.
* Go figure!
*/
CloseHandle(cons);
}
memset(&si, 0, sizeof(si));
si.StartupInfo.cb = sizeof(si);
si.StartupInfo.hStdInput = winansi_get_osfhandle(fhin);
si.StartupInfo.hStdOutput = winansi_get_osfhandle(fhout);
si.StartupInfo.hStdError = winansi_get_osfhandle(fherr);
/* The list of handles cannot contain duplicates */
if (si.StartupInfo.hStdInput != INVALID_HANDLE_VALUE)
stdhandles[stdhandles_count++] = si.StartupInfo.hStdInput;
if (si.StartupInfo.hStdOutput != INVALID_HANDLE_VALUE &&
si.StartupInfo.hStdOutput != si.StartupInfo.hStdInput)
stdhandles[stdhandles_count++] = si.StartupInfo.hStdOutput;
if (si.StartupInfo.hStdError != INVALID_HANDLE_VALUE &&
si.StartupInfo.hStdError != si.StartupInfo.hStdInput &&
si.StartupInfo.hStdError != si.StartupInfo.hStdOutput)
stdhandles[stdhandles_count++] = si.StartupInfo.hStdError;
if (stdhandles_count)
si.StartupInfo.dwFlags |= STARTF_USESTDHANDLES;
/* executables and the current directory don't support long paths */
if (*argv && !strcmp(cmd, *argv))
wcmd[0] = L'\0';
else if (xutftowcs_path(wcmd, cmd) < 0)
return -1;
if (dir && xutftowcs_path(wdir, dir) < 0)
return -1;
/* concatenate argv, quoting args as we go */
strbuf_init(&args, 0);
if (prepend_cmd) {
char *quoted = (char *)quote_arg(prepend_cmd);
strbuf_addstr(&args, quoted);
if (quoted != prepend_cmd)
free(quoted);
}
for (; *argv; argv++) {
char *quoted = (char *)quote_arg(*argv);
if (*args.buf)
strbuf_addch(&args, ' ');
strbuf_addstr(&args, quoted);
if (quoted != *argv)
free(quoted);
}
strace_env = getenv("GIT_STRACE_COMMANDS");
if (strace_env) {
char *p = path_lookup("strace.exe", 1);
if (!p)
return error("strace not found!");
if (xutftowcs_path(wcmd, p) < 0) {
free(p);
return -1;
}
free(p);
if (!strcmp("1", strace_env) ||
!strcasecmp("yes", strace_env) ||
!strcasecmp("true", strace_env))
strbuf_insert(&args, 0, "strace ", 7);
else {
const char *quoted = quote_arg(strace_env);
struct strbuf buf = STRBUF_INIT;
strbuf_addf(&buf, "strace -o %s ", quoted);
if (quoted != strace_env)
free((char *)quoted);
strbuf_insert(&args, 0, buf.buf, buf.len);
strbuf_release(&buf);
}
}
ALLOC_ARRAY(wargs, st_add(st_mult(2, args.len), 1));
xutftowcs(wargs, args.buf, 2 * args.len + 1);
strbuf_release(&args);
wenvblk = make_environment_block(deltaenv);
memset(&pi, 0, sizeof(pi));
if (restrict_handle_inheritance && stdhandles_count &&
(InitializeProcThreadAttributeList(NULL, 1, 0, &size) ||
GetLastError() == ERROR_INSUFFICIENT_BUFFER) &&
(attr_list = (LPPROC_THREAD_ATTRIBUTE_LIST)
(HeapAlloc(GetProcessHeap(), 0, size))) &&
InitializeProcThreadAttributeList(attr_list, 1, 0, &size) &&
UpdateProcThreadAttribute(attr_list, 0,
PROC_THREAD_ATTRIBUTE_HANDLE_LIST,
stdhandles,
stdhandles_count * sizeof(HANDLE),
NULL, NULL)) {
si.lpAttributeList = attr_list;
flags |= EXTENDED_STARTUPINFO_PRESENT;
}
ret = CreateProcessW(*wcmd ? wcmd : NULL, wargs, NULL, NULL,
stdhandles_count ? TRUE : FALSE,
flags, wenvblk, dir ? wdir : NULL,
&si.StartupInfo, &pi);
/*
* On Windows 2008 R2, it seems that specifying certain types of handles
* (such as FILE_TYPE_CHAR or FILE_TYPE_PIPE) will always produce an
* error. Rather than playing finicky and fragile games, let's just try
* to detect this situation and simply try again without restricting any
* handle inheritance. This is still better than failing to create
* processes.
*/
if (!ret && restrict_handle_inheritance && stdhandles_count) {
DWORD err = GetLastError();
struct strbuf buf = STRBUF_INIT;
if (err != ERROR_NO_SYSTEM_RESOURCES &&
/*
* On Windows 7 and earlier, handles on pipes and character
* devices are inherited automatically, and cannot be
* specified in the thread handle list. Rather than trying
* to catch each and every corner case (and running the
* chance of *still* forgetting a few), let's just fall
* back to creating the process without trying to limit the
* handle inheritance.
*/
!(err == ERROR_INVALID_PARAMETER &&
GetVersion() >> 16 < 9200) &&
!getenv("SUPPRESS_HANDLE_INHERITANCE_WARNING")) {
DWORD fl = 0;
int i;
setenv("SUPPRESS_HANDLE_INHERITANCE_WARNING", "1", 1);
for (i = 0; i < stdhandles_count; i++) {
HANDLE h = stdhandles[i];
strbuf_addf(&buf, "handle #%d: %p (type %lx, "
"handle info (%d) %lx\n", i, h,
GetFileType(h),
GetHandleInformation(h, &fl),
fl);
}
strbuf_addstr(&buf, "\nThis is a bug; please report it "
"at\nhttps://github.com/git-for-windows/"
"git/issues/new\n\n"
"To suppress this warning, please set "
"the environment variable\n\n"
"\tSUPPRESS_HANDLE_INHERITANCE_WARNING=1"
"\n");
}
restrict_handle_inheritance = 0;
flags &= ~EXTENDED_STARTUPINFO_PRESENT;
ret = CreateProcessW(*wcmd ? wcmd : NULL, wargs, NULL, NULL,
TRUE, flags, wenvblk, dir ? wdir : NULL,
&si.StartupInfo, &pi);
if (ret && buf.len) {
errno = err_win_to_posix(GetLastError());
warning("failed to restrict file handles (%ld)\n\n%s",
err, buf.buf);
}
strbuf_release(&buf);
} else if (!ret)
errno = err_win_to_posix(GetLastError());
if (si.lpAttributeList)
DeleteProcThreadAttributeList(si.lpAttributeList);
if (attr_list)
HeapFree(GetProcessHeap(), 0, attr_list);
free(wenvblk);
free(wargs);
if (!ret)
return -1;
CloseHandle(pi.hThread);
/*
* The process ID is the human-readable identifier of the process
* that we want to present in log and error messages. The handle
* is not useful for this purpose. But we cannot close it, either,
* because it is not possible to turn a process ID into a process
* handle after the process terminated.
* Keep the handle in a list for waitpid.
*/
EnterCriticalSection(&pinfo_cs);
{
struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
info->pid = pi.dwProcessId;
info->proc = pi.hProcess;
info->next = pinfo;
pinfo = info;
}
LeaveCriticalSection(&pinfo_cs);
return (pid_t)pi.dwProcessId;
}
static pid_t mingw_spawnv(const char *cmd, const char **argv,
const char *prepend_cmd)
{
return mingw_spawnve_fd(cmd, argv, NULL, NULL, prepend_cmd, 0, 1, 2);
}
pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **deltaenv,
const char *dir,
int fhin, int fhout, int fherr)
{
pid_t pid;
char *prog = path_lookup(cmd, 0);
if (!prog) {
errno = ENOENT;
pid = -1;
}
else {
const char *interpr = parse_interpreter(prog);
if (interpr) {
const char *argv0 = argv[0];
char *iprog = path_lookup(interpr, 1);
argv[0] = prog;
if (!iprog) {
errno = ENOENT;
pid = -1;
}
else {
pid = mingw_spawnve_fd(iprog, argv, deltaenv, dir, interpr,
fhin, fhout, fherr);
free(iprog);
}
argv[0] = argv0;
}
else
pid = mingw_spawnve_fd(prog, argv, deltaenv, dir, NULL,
fhin, fhout, fherr);
free(prog);
}
return pid;
}
static int try_shell_exec(const char *cmd, char *const *argv)
{
const char *interpr = parse_interpreter(cmd);
char *prog;
int pid = 0;
if (!interpr)
return 0;
prog = path_lookup(interpr, 1);
if (prog) {
int argc = 0;
#ifndef _MSC_VER
const
#endif
char **argv2;
while (argv[argc]) argc++;
ALLOC_ARRAY(argv2, argc + 1);
argv2[0] = (char *)cmd; /* full path to the script file */
memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
pid = mingw_spawnv(prog, argv2, interpr);
if (pid >= 0) {
int status;
if (waitpid(pid, &status, 0) < 0)
status = 255;
exit(status);
}
pid = 1; /* indicate that we tried but failed */
free(prog);
free(argv2);
}
return pid;
}
int mingw_execv(const char *cmd, char *const *argv)
{
/* check if git_command is a shell script */
if (!try_shell_exec(cmd, argv)) {
int pid, status;
pid = mingw_spawnv(cmd, (const char **)argv, NULL);
if (pid < 0)
return -1;
if (waitpid(pid, &status, 0) < 0)
status = 255;
exit(status);
}
return -1;
}
int mingw_execvp(const char *cmd, char *const *argv)
{
char *prog = path_lookup(cmd, 0);
if (prog) {
mingw_execv(prog, argv);
free(prog);
} else
errno = ENOENT;
return -1;
}
int mingw_kill(pid_t pid, int sig)
{
if (pid > 0 && sig == SIGTERM) {
HANDLE h = OpenProcess(PROCESS_CREATE_THREAD |
PROCESS_QUERY_INFORMATION |
PROCESS_VM_OPERATION | PROCESS_VM_WRITE |
PROCESS_VM_READ | PROCESS_TERMINATE,
FALSE, pid);
int ret;
if (h)
ret = exit_process(h, 128 + sig);
else {
h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
if (!h) {
errno = err_win_to_posix(GetLastError());
return -1;
}
ret = terminate_process_tree(h, 128 + sig);
}
if (ret) {
errno = err_win_to_posix(GetLastError());
CloseHandle(h);
}
return ret;
} else if (pid > 0 && sig == 0) {
HANDLE h = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, pid);
if (h) {
CloseHandle(h);
return 0;
}
}
errno = EINVAL;
return -1;
}
#if defined(_MSC_VER)
/* UTF8 versions of getenv and putenv (and unsetenv).
* Internally, they use the CRT's stock UNICODE routines
* to avoid data loss.
*
* Unlike the mingw version, we DO NOT directly write to
* the CRT variables. We also DO NOT try to manage/replace
* the CRT storage.
*/
char *msc_getenv(const char *name)
{
int len_key, len_value;
wchar_t *w_key;
char *value;
const wchar_t *w_value;
if (!name || !*name)
return NULL;
len_key = strlen(name) + 1;
w_key = calloc(len_key, sizeof(wchar_t));
xutftowcs(w_key, name, len_key);
w_value = _wgetenv(w_key);
free(w_key);
if (!w_value)
return NULL;
len_value = wcslen(w_value) * 3 + 1;
value = calloc(len_value, sizeof(char));
xwcstoutf(value, w_value, len_value);
/* TODO Warning: We return "value" which is an allocated
* value and the caller is NOT expecting to have to free
* it, so we leak memory.
*/
return value;
}
int msc_putenv(const char *name)
{
int len, result;
char *equal;
wchar_t *wide;
if (!name || !*name)
return 0;
len = strlen(name);
equal = strchr(name, '=');
wide = calloc(len+1+!equal, sizeof(wchar_t));
xutftowcs(wide, name, len+1);
if (!equal)
wcscat(wide, L"=");
result = _wputenv(wide);
free(wide);
return result;
}
#else
/*
* Compare environment entries by key (i.e. stopping at '=' or '\0').
*/
static int compareenv(const void *v1, const void *v2)
{
const char *e1 = *(const char**)v1;
const char *e2 = *(const char**)v2;
for (;;) {
int c1 = *e1++;
int c2 = *e2++;
c1 = (c1 == '=') ? 0 : tolower(c1);
c2 = (c2 == '=') ? 0 : tolower(c2);
if (c1 > c2)
return 1;
if (c1 < c2)
return -1;
if (c1 == 0)
return 0;
}
}
/*
* Functions implemented outside Git are able to modify the environment,
* too. For example, cURL's curl_global_init() function sets the CHARSET
* environment variable (at least in certain circumstances).
*
* Therefore we need to be *really* careful *not* to assume that we have
* sole control over the environment and reinitialize it when necessary.
*/
static void maybe_reinitialize_environ(void)
{
int i;
if (!saved_environ) {
warning("MinGW environment not initialized yet");
return;
}
if (environ_size <= 0)
return;
if (saved_environ != environ)
/* We have *no* idea how much space was allocated outside */
environ_alloc = 0;
else if (!environ[environ_size - 1])
return; /* still consistent */
for (i = 0; environ[i] && *environ[i]; i++)
; /* continue counting */
environ[i] = NULL;
environ_size = i + 1;
/* sort environment for O(log n) getenv / putenv */
qsort(environ, i, sizeof(char*), compareenv);
}
static int bsearchenv(char **env, const char *name, size_t size)
{
unsigned low = 0, high = size;
while (low < high) {
unsigned mid = low + ((high - low) >> 1);
int cmp = compareenv(&env[mid], &name);
if (cmp < 0)
low = mid + 1;
else if (cmp > 0)
high = mid;
else
return mid;
}
return ~low; /* not found, return 1's complement of insert position */
}
/*
* If name contains '=', then sets the variable, otherwise it unsets it
* Size includes the terminating NULL. Env must have room for size + 1 entries
* (in case of insert). Returns the new size. Optionally frees removed entries.
*/
static int do_putenv(char **env, const char *name, int size, int free_old)
{
int i = size <= 0 ? -1 : bsearchenv(env, name, size - 1);
/* optionally free removed / replaced entry */
if (i >= 0 && free_old)
free(env[i]);
if (strchr(name, '=')) {
/* if new value ('key=value') is specified, insert or replace entry */
if (i < 0) {
i = ~i;
memmove(&env[i + 1], &env[i], (size - i) * sizeof(char*));
size++;
}
env[i] = (char*) name;
} else if (i >= 0) {
/* otherwise ('key') remove existing entry */
size--;
memmove(&env[i], &env[i + 1], (size - i) * sizeof(char*));
}
return size;
}
char *mingw_getenv(const char *name)
{
char *value;
int pos;
if (environ_size <= 0)
return NULL;
maybe_reinitialize_environ();
pos = bsearchenv(environ, name, environ_size - 1);
if (pos < 0)
return NULL;
value = strchr(environ[pos], '=');
return value ? &value[1] : NULL;
}
int mingw_putenv(const char *namevalue)
{
maybe_reinitialize_environ();
ALLOC_GROW(environ, (environ_size + 1) * sizeof(char*), environ_alloc);
saved_environ = environ;
environ_size = do_putenv(environ, namevalue, environ_size, 1);
return 0;
}
#endif
/*
* Note, this isn't a complete replacement for getaddrinfo. It assumes
* that service contains a numerical port, or that it is null. It
* does a simple search using gethostbyname, and returns one IPv4 host
* if one was found.
*/
static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
const struct addrinfo *hints,
struct addrinfo **res)
{
struct hostent *h = NULL;
struct addrinfo *ai;
struct sockaddr_in *sin;
if (node) {
h = gethostbyname(node);
if (!h)
return WSAGetLastError();
}
ai = xmalloc(sizeof(struct addrinfo));
*res = ai;
ai->ai_flags = 0;
ai->ai_family = AF_INET;
ai->ai_socktype = hints ? hints->ai_socktype : 0;
switch (ai->ai_socktype) {
case SOCK_STREAM:
ai->ai_protocol = IPPROTO_TCP;
break;
case SOCK_DGRAM:
ai->ai_protocol = IPPROTO_UDP;
break;
default:
ai->ai_protocol = 0;
break;
}
ai->ai_addrlen = sizeof(struct sockaddr_in);
if (hints && (hints->ai_flags & AI_CANONNAME))
ai->ai_canonname = h ? xstrdup(h->h_name) : NULL;
else
ai->ai_canonname = NULL;
sin = xcalloc(1, ai->ai_addrlen);
sin->sin_family = AF_INET;
/* Note: getaddrinfo is supposed to allow service to be a string,
* which should be looked up using getservbyname. This is
* currently not implemented */
if (service)
sin->sin_port = htons(atoi(service));
if (h)
sin->sin_addr = *(struct in_addr *)h->h_addr;
else if (hints && (hints->ai_flags & AI_PASSIVE))
sin->sin_addr.s_addr = INADDR_ANY;
else
sin->sin_addr.s_addr = INADDR_LOOPBACK;
ai->ai_addr = (struct sockaddr *)sin;
ai->ai_next = NULL;
return 0;
}
static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
{
free(res->ai_canonname);
free(res->ai_addr);
free(res);
}
static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
char *host, DWORD hostlen,
char *serv, DWORD servlen, int flags)
{
const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
if (sa->sa_family != AF_INET)
return EAI_FAMILY;
if (!host && !serv)
return EAI_NONAME;
if (host && hostlen > 0) {
struct hostent *ent = NULL;
if (!(flags & NI_NUMERICHOST))
ent = gethostbyaddr((const char *)&sin->sin_addr,
sizeof(sin->sin_addr), AF_INET);
if (ent)
snprintf(host, hostlen, "%s", ent->h_name);
else if (flags & NI_NAMEREQD)
return EAI_NONAME;
else
snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
}
if (serv && servlen > 0) {
struct servent *ent = NULL;
if (!(flags & NI_NUMERICSERV))
ent = getservbyport(sin->sin_port,
flags & NI_DGRAM ? "udp" : "tcp");
if (ent)
snprintf(serv, servlen, "%s", ent->s_name);
else
snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
}
return 0;
}
static HMODULE ipv6_dll = NULL;
static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
const struct addrinfo *hints,
struct addrinfo **res);
static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
char *host, DWORD hostlen,
char *serv, DWORD servlen, int flags);
/*
* gai_strerror is an inline function in the ws2tcpip.h header, so we
* don't need to try to load that one dynamically.
*/
static void socket_cleanup(void)
{
WSACleanup();
if (ipv6_dll)
FreeLibrary(ipv6_dll);
ipv6_dll = NULL;
ipv6_freeaddrinfo = freeaddrinfo_stub;
ipv6_getaddrinfo = getaddrinfo_stub;
ipv6_getnameinfo = getnameinfo_stub;
}
static void ensure_socket_initialization(void)
{
WSADATA wsa;
static int initialized = 0;
const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
const char **name;
if (initialized)
return;
if (WSAStartup(MAKEWORD(2,2), &wsa))
die("unable to initialize winsock subsystem, error %d",
WSAGetLastError());
for (name = libraries; *name; name++) {
ipv6_dll = LoadLibraryExA(*name, NULL,
LOAD_LIBRARY_SEARCH_SYSTEM32);
if (!ipv6_dll)
continue;
ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
GetProcAddress(ipv6_dll, "freeaddrinfo");
ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
const struct addrinfo *,
struct addrinfo **))
GetProcAddress(ipv6_dll, "getaddrinfo");
ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
socklen_t, char *, DWORD,
char *, DWORD, int))
GetProcAddress(ipv6_dll, "getnameinfo");
if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
FreeLibrary(ipv6_dll);
ipv6_dll = NULL;
} else
break;
}
if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
ipv6_freeaddrinfo = freeaddrinfo_stub;
ipv6_getaddrinfo = getaddrinfo_stub;
ipv6_getnameinfo = getnameinfo_stub;
}
atexit(socket_cleanup);
initialized = 1;
}
#undef gethostname
int mingw_gethostname(char *name, int namelen)
{
ensure_socket_initialization();
return gethostname(name, namelen);
}
#undef gethostbyname
struct hostent *mingw_gethostbyname(const char *host)
{
ensure_socket_initialization();
return gethostbyname(host);
}
void mingw_freeaddrinfo(struct addrinfo *res)
{
ipv6_freeaddrinfo(res);
}
int mingw_getaddrinfo(const char *node, const char *service,
const struct addrinfo *hints, struct addrinfo **res)
{
ensure_socket_initialization();
return ipv6_getaddrinfo(node, service, hints, res);
}
int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
char *host, DWORD hostlen, char *serv, DWORD servlen,
int flags)
{
ensure_socket_initialization();
return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
}
int mingw_socket(int domain, int type, int protocol)
{
int sockfd;
SOCKET s;
ensure_socket_initialization();
s = WSASocket(domain, type, protocol, NULL, 0, 0);
if (s == INVALID_SOCKET) {
/*
* WSAGetLastError() values are regular BSD error codes
* biased by WSABASEERR.
* However, strerror() does not know about networking
* specific errors, which are values beginning at 38 or so.
* Therefore, we choose to leave the biased error code
* in errno so that _if_ someone looks up the code somewhere,
* then it is at least the number that are usually listed.
*/
errno = WSAGetLastError();
return -1;
}
/* convert into a file descriptor */
if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
closesocket(s);
return error("unable to make a socket file descriptor: %s",
strerror(errno));
}
return sockfd;
}
#undef connect
int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
{
SOCKET s = (SOCKET)_get_osfhandle(sockfd);
return connect(s, sa, sz);
}
#undef bind
int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
{
SOCKET s = (SOCKET)_get_osfhandle(sockfd);
return bind(s, sa, sz);
}
#undef setsockopt
int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
{
SOCKET s = (SOCKET)_get_osfhandle(sockfd);
return setsockopt(s, lvl, optname, (const char*)optval, optlen);
}
#undef shutdown
int mingw_shutdown(int sockfd, int how)
{
SOCKET s = (SOCKET)_get_osfhandle(sockfd);
return shutdown(s, how);
}
#undef listen
int mingw_listen(int sockfd, int backlog)
{
SOCKET s = (SOCKET)_get_osfhandle(sockfd);
return listen(s, backlog);
}
#undef accept
int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
{
int sockfd2;
SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
SOCKET s2 = accept(s1, sa, sz);
/* convert into a file descriptor */
if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
int err = errno;
closesocket(s2);
return error("unable to make a socket file descriptor: %s",
strerror(err));
}
return sockfd2;
}
#undef rename
int mingw_rename(const char *pold, const char *pnew)
{
DWORD attrs = INVALID_FILE_ATTRIBUTES, gle;
int tries = 0;
wchar_t wpold[MAX_LONG_PATH], wpnew[MAX_LONG_PATH];
if (xutftowcs_long_path(wpold, pold) < 0 ||
xutftowcs_long_path(wpnew, pnew) < 0)
return -1;
repeat:
if (MoveFileExW(wpold, wpnew,
MOVEFILE_REPLACE_EXISTING | MOVEFILE_COPY_ALLOWED))
return 0;
gle = GetLastError();
/* revert file attributes on failure */
if (attrs != INVALID_FILE_ATTRIBUTES)
SetFileAttributesW(wpnew, attrs);
if (!is_file_in_use_error(gle)) {
errno = err_win_to_posix(gle);
return -1;
}
if (attrs == INVALID_FILE_ATTRIBUTES &&
(attrs = GetFileAttributesW(wpnew)) != INVALID_FILE_ATTRIBUTES) {
if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
DWORD attrsold = GetFileAttributesW(wpold);
if (attrsold == INVALID_FILE_ATTRIBUTES ||
!(attrsold & FILE_ATTRIBUTE_DIRECTORY))
errno = EISDIR;
else if (!_wrmdir(wpnew))
goto repeat;
return -1;
}
if ((attrs & FILE_ATTRIBUTE_READONLY) &&
SetFileAttributesW(wpnew, attrs & ~FILE_ATTRIBUTE_READONLY))
goto repeat;
}
if (retry_ask_yes_no(&tries, "Rename from '%s' to '%s' failed. "
"Should I try again?", pold, pnew))
goto repeat;
errno = EACCES;
return -1;
}
/*
* Note that this doesn't return the actual pagesize, but
* the allocation granularity. If future Windows specific git code
* needs the real getpagesize function, we need to find another solution.
*/
int mingw_getpagesize(void)
{
SYSTEM_INFO si;
GetSystemInfo(&si);
return si.dwAllocationGranularity;
}
/* See https://msdn.microsoft.com/en-us/library/windows/desktop/ms724435.aspx */
enum EXTENDED_NAME_FORMAT {
NameDisplay = 3,
NameUserPrincipal = 8
};
static char *get_extended_user_info(enum EXTENDED_NAME_FORMAT type)
{
DECLARE_PROC_ADDR(secur32.dll, BOOL, GetUserNameExW,
enum EXTENDED_NAME_FORMAT, LPCWSTR, PULONG);
static wchar_t wbuffer[1024];
DWORD len;
if (!INIT_PROC_ADDR(GetUserNameExW))
return NULL;
len = ARRAY_SIZE(wbuffer);
if (GetUserNameExW(type, wbuffer, &len)) {
char *converted = xmalloc((len *= 3));
if (xwcstoutf(converted, wbuffer, len) >= 0)
return converted;
free(converted);
}
return NULL;
}
char *mingw_query_user_email(void)
{
return get_extended_user_info(NameUserPrincipal);
}
struct passwd *getpwuid(int uid)
{
static unsigned initialized;
static char user_name[100];
static struct passwd *p;
DWORD len;
if (initialized)
return p;
len = sizeof(user_name);
if (!GetUserName(user_name, &len)) {
initialized = 1;
return NULL;
}
p = xmalloc(sizeof(*p));
p->pw_name = user_name;
p->pw_gecos = get_extended_user_info(NameDisplay);
if (!p->pw_gecos)
p->pw_gecos = "unknown";
p->pw_dir = NULL;
initialized = 1;
return p;
}
static HANDLE timer_event;
static HANDLE timer_thread;
static int timer_interval;
static int one_shot;
static sig_handler_t timer_fn = SIG_DFL, sigint_fn = SIG_DFL;
/* The timer works like this:
* The thread, ticktack(), is a trivial routine that most of the time
* only waits to receive the signal to terminate. The main thread tells
* the thread to terminate by setting the timer_event to the signalled
* state.
* But ticktack() interrupts the wait state after the timer's interval
* length to call the signal handler.
*/
static unsigned __stdcall ticktack(void *dummy)
{
while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
mingw_raise(SIGALRM);
if (one_shot)
break;
}
return 0;
}
static int start_timer_thread(void)
{
timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
if (timer_event) {
timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
if (!timer_thread )
return errno = ENOMEM,
error("cannot start timer thread");
} else
return errno = ENOMEM,
error("cannot allocate resources for timer");
return 0;
}
static void stop_timer_thread(void)
{
if (timer_event)
SetEvent(timer_event); /* tell thread to terminate */
if (timer_thread) {
int rc = WaitForSingleObject(timer_thread, 1000);
if (rc == WAIT_TIMEOUT)
error("timer thread did not terminate timely");
else if (rc != WAIT_OBJECT_0)
error("waiting for timer thread failed: %lu",
GetLastError());
CloseHandle(timer_thread);
}
if (timer_event)
CloseHandle(timer_event);
timer_event = NULL;
timer_thread = NULL;
}
static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
{
return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
}
int setitimer(int type, struct itimerval *in, struct itimerval *out)
{
static const struct timeval zero;
static int atexit_done;
if (out != NULL)
return errno = EINVAL,
error("setitimer param 3 != NULL not implemented");
if (!is_timeval_eq(&in->it_interval, &zero) &&
!is_timeval_eq(&in->it_interval, &in->it_value))
return errno = EINVAL,
error("setitimer: it_interval must be zero or eq it_value");
if (timer_thread)
stop_timer_thread();
if (is_timeval_eq(&in->it_value, &zero) &&
is_timeval_eq(&in->it_interval, &zero))
return 0;
timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
one_shot = is_timeval_eq(&in->it_interval, &zero);
if (!atexit_done) {
atexit(stop_timer_thread);
atexit_done = 1;
}
return start_timer_thread();
}
int sigaction(int sig, struct sigaction *in, struct sigaction *out)
{
if (sig != SIGALRM)
return errno = EINVAL,
error("sigaction only implemented for SIGALRM");
if (out != NULL)
return errno = EINVAL,
error("sigaction: param 3 != NULL not implemented");
timer_fn = in->sa_handler;
return 0;
}
#undef signal
sig_handler_t mingw_signal(int sig, sig_handler_t handler)
{
sig_handler_t old;
switch (sig) {
case SIGALRM:
old = timer_fn;
timer_fn = handler;
break;
case SIGINT:
old = sigint_fn;
sigint_fn = handler;
break;
default:
return signal(sig, handler);
}
return old;
}
#undef raise
int mingw_raise(int sig)
{
switch (sig) {
case SIGALRM:
if (timer_fn == SIG_DFL) {
if (isatty(STDERR_FILENO))
fputs("Alarm clock\n", stderr);
exit(128 + SIGALRM);
} else if (timer_fn != SIG_IGN)
timer_fn(SIGALRM);
return 0;
case SIGINT:
if (sigint_fn == SIG_DFL)
exit(128 + SIGINT);
else if (sigint_fn != SIG_IGN)
sigint_fn(SIGINT);
return 0;
#if defined(_MSC_VER)
/*
* <signal.h> in the CRT defines 8 signals as being
* supported on the platform. Anything else causes
* an "Invalid signal or error" (which in DEBUG builds
* causes the Abort/Retry/Ignore dialog). We by-pass
* the CRT for things we already know will fail.
*/
/*case SIGINT:*/
case SIGILL:
case SIGFPE:
case SIGSEGV:
case SIGTERM:
case SIGBREAK:
case SIGABRT:
case SIGABRT_COMPAT:
return raise(sig);
default:
errno = EINVAL;
return -1;
#else
default:
return raise(sig);
#endif
}
}
int link(const char *oldpath, const char *newpath)
{
wchar_t woldpath[MAX_LONG_PATH], wnewpath[MAX_LONG_PATH];
if (xutftowcs_long_path(woldpath, oldpath) < 0 ||
xutftowcs_long_path(wnewpath, newpath) < 0)
return -1;
if (!CreateHardLinkW(wnewpath, woldpath, NULL)) {
errno = err_win_to_posix(GetLastError());
return -1;
}
return 0;
}
int symlink(const char *target, const char *link)
{
wchar_t wtarget[MAX_LONG_PATH], wlink[MAX_LONG_PATH];
int len;
/* fail if symlinks are disabled or API is not supported (WinXP) */
if (!has_symlinks) {
errno = ENOSYS;
return -1;
}
if ((len = xutftowcs_long_path(wtarget, target)) < 0
|| xutftowcs_long_path(wlink, link) < 0)
return -1;
/* convert target dir separators to backslashes */
while (len--)
if (wtarget[len] == '/')
wtarget[len] = '\\';
/* create file symlink */
if (!CreateSymbolicLinkW(wlink, wtarget, symlink_file_flags)) {
errno = err_win_to_posix(GetLastError());
return -1;
}
/* convert to directory symlink if target exists */
switch (process_phantom_symlink(wtarget, wlink)) {
case PHANTOM_SYMLINK_RETRY: {
/* if target doesn't exist, add to phantom symlinks list */
wchar_t wfullpath[MAX_LONG_PATH];
struct phantom_symlink_info *psi;
/* convert to absolute path to be independent of cwd */
len = GetFullPathNameW(wlink, MAX_LONG_PATH, wfullpath, NULL);
if (!len || len >= MAX_LONG_PATH) {
errno = err_win_to_posix(GetLastError());
return -1;
}
/* over-allocate and fill phantom_symlink_info structure */
psi = xmalloc(sizeof(struct phantom_symlink_info)
+ sizeof(wchar_t) * (len + wcslen(wtarget) + 2));
psi->wlink = (wchar_t *)(psi + 1);
wcscpy(psi->wlink, wfullpath);
psi->wtarget = psi->wlink + len + 1;
wcscpy(psi->wtarget, wtarget);
EnterCriticalSection(&phantom_symlinks_cs);
psi->next = phantom_symlinks;
phantom_symlinks = psi;
LeaveCriticalSection(&phantom_symlinks_cs);
break;
}
case PHANTOM_SYMLINK_DIRECTORY:
/* if we created a dir symlink, process other phantom symlinks */
process_phantom_symlinks();
break;
default:
break;
}
return 0;
}
#ifndef _WINNT_H
/*
* The REPARSE_DATA_BUFFER structure is defined in the Windows DDK (in
* ntifs.h) and in MSYS1's winnt.h (which defines _WINNT_H). So define
* it ourselves if we are on MSYS2 (whose winnt.h defines _WINNT_).
*/
typedef struct _REPARSE_DATA_BUFFER {
DWORD ReparseTag;
WORD ReparseDataLength;
WORD Reserved;
#ifndef _MSC_VER
_ANONYMOUS_UNION
#endif
union {
struct {
WORD SubstituteNameOffset;
WORD SubstituteNameLength;
WORD PrintNameOffset;
WORD PrintNameLength;
ULONG Flags;
WCHAR PathBuffer[1];
} SymbolicLinkReparseBuffer;
struct {
WORD SubstituteNameOffset;
WORD SubstituteNameLength;
WORD PrintNameOffset;
WORD PrintNameLength;
WCHAR PathBuffer[1];
} MountPointReparseBuffer;
struct {
BYTE DataBuffer[1];
} GenericReparseBuffer;
} DUMMYUNIONNAME;
} REPARSE_DATA_BUFFER, *PREPARSE_DATA_BUFFER;
#endif
int readlink(const char *path, char *buf, size_t bufsiz)
{
HANDLE handle;
WCHAR wpath[MAX_LONG_PATH], *wbuf;
REPARSE_DATA_BUFFER *b = alloca(MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
DWORD dummy;
char tmpbuf[MAX_LONG_PATH];
int len;
if (xutftowcs_long_path(wpath, path) < 0)
return -1;
/* read reparse point data */
handle = CreateFileW(wpath, 0,
FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL,
OPEN_EXISTING,
FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OPEN_REPARSE_POINT, NULL);
if (handle == INVALID_HANDLE_VALUE) {
errno = err_win_to_posix(GetLastError());
return -1;
}
if (!DeviceIoControl(handle, FSCTL_GET_REPARSE_POINT, NULL, 0, b,
MAXIMUM_REPARSE_DATA_BUFFER_SIZE, &dummy, NULL)) {
errno = err_win_to_posix(GetLastError());
CloseHandle(handle);
return -1;
}
CloseHandle(handle);
/* get target path for symlinks or mount points (aka 'junctions') */
switch (b->ReparseTag) {
case IO_REPARSE_TAG_SYMLINK:
wbuf = (WCHAR*) (((char*) b->SymbolicLinkReparseBuffer.PathBuffer)
+ b->SymbolicLinkReparseBuffer.SubstituteNameOffset);
*(WCHAR*) (((char*) wbuf)
+ b->SymbolicLinkReparseBuffer.SubstituteNameLength) = 0;
break;
case IO_REPARSE_TAG_MOUNT_POINT:
wbuf = (WCHAR*) (((char*) b->MountPointReparseBuffer.PathBuffer)
+ b->MountPointReparseBuffer.SubstituteNameOffset);
*(WCHAR*) (((char*) wbuf)
+ b->MountPointReparseBuffer.SubstituteNameLength) = 0;
break;
default:
errno = EINVAL;
return -1;
}
/*
* Adapt to strange readlink() API: Copy up to bufsiz *bytes*, potentially
* cutting off a UTF-8 sequence. Insufficient bufsize is *not* a failure
* condition. There is no conversion function that produces invalid UTF-8,
* so convert to a (hopefully large enough) temporary buffer, then memcpy
* the requested number of bytes (including '\0' for robustness).
*/
if ((len = xwcstoutf(tmpbuf, normalize_ntpath(wbuf), MAX_LONG_PATH)) < 0)
return -1;
memcpy(buf, tmpbuf, min(bufsiz, len + 1));
return min(bufsiz, len);
}
pid_t waitpid(pid_t pid, int *status, int options)
{
HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
FALSE, pid);
if (!h) {
errno = ECHILD;
return -1;
}
if (pid > 0 && options & WNOHANG) {
if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
CloseHandle(h);
return 0;
}
options &= ~WNOHANG;
}
if (options == 0) {
struct pinfo_t **ppinfo;
if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
CloseHandle(h);
return 0;
}
if (status)
GetExitCodeProcess(h, (LPDWORD)status);
EnterCriticalSection(&pinfo_cs);
ppinfo = &pinfo;
while (*ppinfo) {
struct pinfo_t *info = *ppinfo;
if (info->pid == pid) {
CloseHandle(info->proc);
*ppinfo = info->next;
free(info);
break;
}
ppinfo = &info->next;
}
LeaveCriticalSection(&pinfo_cs);
CloseHandle(h);
return pid;
}
CloseHandle(h);
errno = EINVAL;
return -1;
}
int mingw_skip_dos_drive_prefix(char **path)
{
int ret = has_dos_drive_prefix(*path);
*path += ret;
return ret;
}
int mingw_offset_1st_component(const char *path)
{
char *pos = (char *)path;
/* unc paths */
if (!skip_dos_drive_prefix(&pos) &&
is_dir_sep(pos[0]) && is_dir_sep(pos[1])) {
/* skip server name */
pos = strpbrk(pos + 2, "\\/");
if (!pos)
return 0; /* Error: malformed unc path */
do {
pos++;
} while (*pos && !is_dir_sep(*pos));
}
return pos + is_dir_sep(*pos) - path;
}
int xutftowcsn(wchar_t *wcs, const char *utfs, size_t wcslen, int utflen)
{
int upos = 0, wpos = 0;
const unsigned char *utf = (const unsigned char*) utfs;
if (!utf || !wcs || wcslen < 1) {
errno = EINVAL;
return -1;
}
/* reserve space for \0 */
wcslen--;
if (utflen < 0)
utflen = INT_MAX;
while (upos < utflen) {
int c = utf[upos++] & 0xff;
if (utflen == INT_MAX && c == 0)
break;
if (wpos >= wcslen) {
wcs[wpos] = 0;
errno = ERANGE;
return -1;
}
if (c < 0x80) {
/* ASCII */
wcs[wpos++] = c;
} else if (c >= 0xc2 && c < 0xe0 && upos < utflen &&
(utf[upos] & 0xc0) == 0x80) {
/* 2-byte utf-8 */
c = ((c & 0x1f) << 6);
c |= (utf[upos++] & 0x3f);
wcs[wpos++] = c;
} else if (c >= 0xe0 && c < 0xf0 && upos + 1 < utflen &&
!(c == 0xe0 && utf[upos] < 0xa0) && /* over-long encoding */
(utf[upos] & 0xc0) == 0x80 &&
(utf[upos + 1] & 0xc0) == 0x80) {
/* 3-byte utf-8 */
c = ((c & 0x0f) << 12);
c |= ((utf[upos++] & 0x3f) << 6);
c |= (utf[upos++] & 0x3f);
wcs[wpos++] = c;
} else if (c >= 0xf0 && c < 0xf5 && upos + 2 < utflen &&
wpos + 1 < wcslen &&
!(c == 0xf0 && utf[upos] < 0x90) && /* over-long encoding */
!(c == 0xf4 && utf[upos] >= 0x90) && /* > \u10ffff */
(utf[upos] & 0xc0) == 0x80 &&
(utf[upos + 1] & 0xc0) == 0x80 &&
(utf[upos + 2] & 0xc0) == 0x80) {
/* 4-byte utf-8: convert to \ud8xx \udcxx surrogate pair */
c = ((c & 0x07) << 18);
c |= ((utf[upos++] & 0x3f) << 12);
c |= ((utf[upos++] & 0x3f) << 6);
c |= (utf[upos++] & 0x3f);
c -= 0x10000;
wcs[wpos++] = 0xd800 | (c >> 10);
wcs[wpos++] = 0xdc00 | (c & 0x3ff);
} else if (c >= 0xa0) {
/* invalid utf-8 byte, printable unicode char: convert 1:1 */
wcs[wpos++] = c;
} else {
/* invalid utf-8 byte, non-printable unicode: convert to hex */
static const char *hex = "0123456789abcdef";
wcs[wpos++] = hex[c >> 4];
if (wpos < wcslen)
wcs[wpos++] = hex[c & 0x0f];
}
}
wcs[wpos] = 0;
return wpos;
}
int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen)
{
if (!wcs || !utf || utflen < 1) {
errno = EINVAL;
return -1;
}
utflen = WideCharToMultiByte(CP_UTF8, 0, wcs, -1, utf, utflen, NULL, NULL);
if (utflen)
return utflen - 1;
errno = ERANGE;
return -1;
}
static void setup_windows_environment(void)
{
char *tmp = getenv("TMPDIR");
/* on Windows it is TMP and TEMP */
if (!tmp) {
if (!(tmp = getenv("TMP")))
tmp = getenv("TEMP");
if (tmp) {
setenv("TMPDIR", tmp, 1);
tmp = getenv("TMPDIR");
}
}
if (tmp) {
/*
* Convert all dir separators to forward slashes,
* to help shell commands called from the Git
* executable (by not mistaking the dir separators
* for escape characters).
*/
convert_slashes(tmp);
}
/* simulate TERM to enable auto-color (see color.c) */
if (!getenv("TERM"))
setenv("TERM", "cygwin", 1);
/* calculate HOME if not set */
if (!getenv("HOME")) {
/*
* try $HOMEDRIVE$HOMEPATH - the home share may be a network
* location, thus also check if the path exists (i.e. is not
* disconnected)
*/
if ((tmp = getenv("HOMEDRIVE"))) {
struct strbuf buf = STRBUF_INIT;
strbuf_addstr(&buf, tmp);
if ((tmp = getenv("HOMEPATH"))) {
strbuf_addstr(&buf, tmp);
if (is_directory(buf.buf))
setenv("HOME", buf.buf, 1);
else
tmp = NULL; /* use $USERPROFILE */
}
strbuf_release(&buf);
}
/* use $USERPROFILE if the home share is not available */
if (!tmp && (tmp = getenv("USERPROFILE")))
setenv("HOME", tmp, 1);
}
/*
* Change 'core.symlinks' default to false, unless native symlinks are
* enabled in MSys2 (via 'MSYS=winsymlinks:nativestrict'). Thus we can
* run the test suite (which doesn't obey config files) with or without
* symlink support.
*/
if (!(tmp = getenv("MSYS")) || !strstr(tmp, "winsymlinks:nativestrict"))
has_symlinks = 0;
if (!getenv("LC_ALL") && !getenv("LC_CTYPE") && !getenv("LANG"))
setenv("LC_CTYPE", "C", 1);
}
int handle_long_path(wchar_t *path, int len, int max_path, int expand)
{
int result;
wchar_t buf[MAX_LONG_PATH];
/*
* we don't need special handling if path is relative to the current
* directory, and current directory + path don't exceed the desired
* max_path limit. This should cover > 99 % of cases with minimal
* performance impact (git almost always uses relative paths).
*/
if ((len < 2 || (!is_dir_sep(path[0]) && path[1] != ':')) &&
(current_directory_len + len < max_path))
return len;
/*
* handle everything else:
* - absolute paths: "C:\dir\file"
* - absolute UNC paths: "\\server\share\dir\file"
* - absolute paths on current drive: "\dir\file"
* - relative paths on other drive: "X:file"
* - prefixed paths: "\\?\...", "\\.\..."
*/
/* convert to absolute path using GetFullPathNameW */
result = GetFullPathNameW(path, MAX_LONG_PATH, buf, NULL);
if (!result) {
errno = err_win_to_posix(GetLastError());
return -1;
}
/*
* return absolute path if it fits within max_path (even if
* "cwd + path" doesn't due to '..' components)
*/
if (result < max_path) {
wcscpy(path, buf);
return result;
}
/* error out if we shouldn't expand the path or buf is too small */
if (!expand || result >= MAX_LONG_PATH - 6) {
errno = ENAMETOOLONG;
return -1;
}
/* prefix full path with "\\?\" or "\\?\UNC\" */
if (buf[0] == '\\') {
/* ...unless already prefixed */
if (buf[1] == '\\' && (buf[2] == '?' || buf[2] == '.'))
return len;
wcscpy(path, L"\\\\?\\UNC\\");
wcscpy(path + 8, buf + 2);
return result + 6;
} else {
wcscpy(path, L"\\\\?\\");
wcscpy(path + 4, buf);
return result + 4;
}
}
#if !defined(_MSC_VER)
/*
* Disable MSVCRT command line wildcard expansion (__getmainargs called from
* mingw startup code, see init.c in mingw runtime).
*/
int _CRT_glob = 0;
typedef struct {
int newmode;
} _startupinfo;
extern int __wgetmainargs(int *argc, wchar_t ***argv, wchar_t ***env, int glob,
_startupinfo *si);
#endif
static NORETURN void die_startup(void)
{
fputs("fatal: not enough memory for initialization", stderr);
exit(128);
}
static void *malloc_startup(size_t size)
{
void *result = malloc(size);
if (!result)
die_startup();
return result;
}
static char *wcstoutfdup_startup(char *buffer, const wchar_t *wcs, size_t len)
{
len = xwcstoutf(buffer, wcs, len) + 1;
return memcpy(malloc_startup(len), buffer, len);
}
static void maybe_redirect_std_handle(const wchar_t *key, DWORD std_id, int fd,
DWORD desired_access, DWORD flags)
{
DWORD create_flag = fd ? OPEN_ALWAYS : OPEN_EXISTING;
wchar_t buf[MAX_PATH];
DWORD max = ARRAY_SIZE(buf);
HANDLE handle;
DWORD ret = GetEnvironmentVariableW(key, buf, max);
if (!ret || ret >= max)
return;
/* make sure this does not leak into child processes */
SetEnvironmentVariableW(key, NULL);
if (!wcscmp(buf, L"off")) {
close(fd);
handle = GetStdHandle(std_id);
if (handle != INVALID_HANDLE_VALUE)
CloseHandle(handle);
return;
}
if (std_id == STD_ERROR_HANDLE && !wcscmp(buf, L"2>&1")) {
handle = GetStdHandle(STD_OUTPUT_HANDLE);
if (handle == INVALID_HANDLE_VALUE) {
close(fd);
handle = GetStdHandle(std_id);
if (handle != INVALID_HANDLE_VALUE)
CloseHandle(handle);
} else {
int new_fd = _open_osfhandle((intptr_t)handle, O_BINARY);
SetStdHandle(std_id, handle);
dup2(new_fd, fd);
/* do *not* close the new_fd: that would close stdout */
}
return;
}
handle = CreateFileW(buf, desired_access, 0, NULL, create_flag,
flags, NULL);
if (handle != INVALID_HANDLE_VALUE) {
int new_fd = _open_osfhandle((intptr_t)handle, O_BINARY);
SetStdHandle(std_id, handle);
dup2(new_fd, fd);
close(new_fd);
}
}
static void maybe_redirect_std_handles(void)
{
maybe_redirect_std_handle(L"GIT_REDIRECT_STDIN", STD_INPUT_HANDLE, 0,
GENERIC_READ, FILE_ATTRIBUTE_NORMAL);
maybe_redirect_std_handle(L"GIT_REDIRECT_STDOUT", STD_OUTPUT_HANDLE, 1,
GENERIC_WRITE, FILE_ATTRIBUTE_NORMAL);
maybe_redirect_std_handle(L"GIT_REDIRECT_STDERR", STD_ERROR_HANDLE, 2,
GENERIC_WRITE, FILE_FLAG_NO_BUFFERING);
}
static void adjust_symlink_flags(void)
{
/*
* Starting with Windows 10 Build 14972, symbolic links can be created
* using CreateSymbolicLink() without elevation by passing the flag
* SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE (0x02) as last
* parameter, provided the Developer Mode has been enabled. Some
* earlier Windows versions complain about this flag with an
* ERROR_INVALID_PARAMETER, hence we have to test the build number
* specifically.
*/
if (GetVersion() >= 14972 << 16) {
symlink_file_flags |= 2;
symlink_directory_flags |= 2;
}
}
static BOOL WINAPI handle_ctrl_c(DWORD ctrl_type)
{
if (ctrl_type != CTRL_C_EVENT)
return FALSE; /* we did not handle this */
mingw_raise(SIGINT);
return TRUE; /* we did handle this */
}
#if defined(_MSC_VER)
#ifdef _DEBUG
#include <crtdbg.h>
#endif
/*
* This routine sits between wmain() and "main" in git.exe.
* We receive UNICODE (wchar_t) values for argv and env.
*
* To be more compatible with the core git code, we convert
* argv into UTF8 and pass them directly to the "main" routine.
*
* We don't bother converting the given UNICODE env vector,
* but rather leave them in the CRT. We replaced the various
* getenv/putenv routines to pull them directly from the CRT.
*
* This is unlike the MINGW version:
* [] It does the UNICODE-2-UTF8 conversion on both sets and
* stuffs the values back into the CRT using exported symbols.
* [] It also maintains a private copy of the environment and
* tries to track external changes to it.
*/
int msc_startup(int argc, wchar_t **w_argv, wchar_t **w_env)
{
char **my_utf8_argv = NULL, **save = NULL;
char *buffer = NULL;
int maxlen;
int k, exit_status;
#ifdef _DEBUG
_CrtSetReportMode(_CRT_ASSERT, _CRTDBG_MODE_DEBUG);
#endif
#ifdef USE_MSVC_CRTDBG
_CrtSetDbgFlag(_CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF);
#endif
SetConsoleCtrlHandler(handle_ctrl_c, TRUE);
fsync_object_files = 1;
maybe_redirect_std_handles();
adjust_symlink_flags();
/* determine size of argv conversion buffer */
maxlen = wcslen(_wpgmptr);
for (k = 1; k < argc; k++)
maxlen = max(maxlen, wcslen(w_argv[k]));
/* allocate buffer (wchar_t encodes to max 3 UTF-8 bytes) */
maxlen = 3 * maxlen + 1;
buffer = malloc_startup(maxlen);
/*
* Create a UTF-8 version of w_argv. Also create a "save" copy
* to remember all the string pointers because parse_options()
* will remove claimed items from the argv that we pass down.
*/
ALLOC_ARRAY(my_utf8_argv, argc + 1);
ALLOC_ARRAY(save, argc + 1);
save[0] = my_utf8_argv[0] = wcstoutfdup_startup(buffer, _wpgmptr, maxlen);
for (k = 1; k < argc; k++)
save[k] = my_utf8_argv[k] = wcstoutfdup_startup(buffer, w_argv[k], maxlen);
save[k] = my_utf8_argv[k] = NULL;
free(buffer);
/* fix Windows specific environment settings */
setup_windows_environment();
unset_environment_variables = xstrdup("PERL5LIB");
/* initialize critical section for waitpid pinfo_t list */
InitializeCriticalSection(&pinfo_cs);
InitializeCriticalSection(&phantom_symlinks_cs);
/* set up default file mode and file modes for stdin/out/err */
_fmode = _O_BINARY;
_setmode(_fileno(stdin), _O_BINARY);
_setmode(_fileno(stdout), _O_BINARY);
_setmode(_fileno(stderr), _O_BINARY);
/* initialize Unicode console */
winansi_init();
/* init length of current directory for handle_long_path */
current_directory_len = GetCurrentDirectoryW(0, NULL);
/* invoke the real main() using our utf8 version of argv. */
exit_status = msc_main(argc, my_utf8_argv);
for (k = 0; k < argc; k++)
free(save[k]);
free(save);
free(my_utf8_argv);
return exit_status;
}
#else
void mingw_startup(void)
{
int i, maxlen, argc;
char *buffer;
wchar_t **wenv, **wargv;
_startupinfo si;
SetConsoleCtrlHandler(handle_ctrl_c, TRUE);
fsync_object_files = 1;
maybe_redirect_std_handles();
adjust_symlink_flags();
/* get wide char arguments and environment */
si.newmode = 0;
if (__wgetmainargs(&argc, &wargv, &wenv, _CRT_glob, &si) < 0)
die_startup();
/* determine size of argv and environ conversion buffer */
maxlen = wcslen(wargv[0]);
for (i = 1; i < argc; i++)
maxlen = max(maxlen, wcslen(wargv[i]));
for (i = 0; wenv[i]; i++)
maxlen = max(maxlen, wcslen(wenv[i]));
/*
* nedmalloc can't free CRT memory, allocate resizable environment
* list. Note that xmalloc / xmemdupz etc. call getenv, so we cannot
* use it while initializing the environment itself.
*/
environ_size = i + 1;
environ_alloc = alloc_nr(environ_size * sizeof(char*));
saved_environ = environ = malloc_startup(environ_alloc);
/* allocate buffer (wchar_t encodes to max 3 UTF-8 bytes) */
maxlen = 3 * maxlen + 1;
buffer = malloc_startup(maxlen);
/* convert command line arguments and environment to UTF-8 */
for (i = 0; i < argc; i++)
__argv[i] = wcstoutfdup_startup(buffer, wargv[i], maxlen);
for (i = 0; wenv[i]; i++)
environ[i] = wcstoutfdup_startup(buffer, wenv[i], maxlen);
environ[i] = NULL;
free(buffer);
/* sort environment for O(log n) getenv / putenv */
qsort(environ, i, sizeof(char*), compareenv);
/* fix Windows specific environment settings */
setup_windows_environment();
unset_environment_variables = xstrdup("PERL5LIB");
/*
* Avoid a segmentation fault when cURL tries to set the CHARSET
* variable and putenv() barfs at our nedmalloc'ed environment.
*/
if (!getenv("CHARSET")) {
struct strbuf buf = STRBUF_INIT;
strbuf_addf(&buf, "cp%u", GetACP());
setenv("CHARSET", buf.buf, 1);
strbuf_release(&buf);
}
/* initialize critical section for waitpid pinfo_t list */
InitializeCriticalSection(&pinfo_cs);
InitializeCriticalSection(&phantom_symlinks_cs);
/* set up default file mode and file modes for stdin/out/err */
_fmode = _O_BINARY;
_setmode(_fileno(stdin), _O_BINARY);
_setmode(_fileno(stdout), _O_BINARY);
_setmode(_fileno(stderr), _O_BINARY);
/* initialize Unicode console */
winansi_init();
/* init length of current directory for handle_long_path */
current_directory_len = GetCurrentDirectoryW(0, NULL);
}
#endif
int uname(struct utsname *buf)
{
unsigned v = (unsigned)GetVersion();
memset(buf, 0, sizeof(*buf));
xsnprintf(buf->sysname, sizeof(buf->sysname), "Windows");
xsnprintf(buf->release, sizeof(buf->release),
"%u.%u", v & 0xff, (v >> 8) & 0xff);
/* assuming NT variants only.. */
xsnprintf(buf->version, sizeof(buf->version),
"%u", (v >> 16) & 0x7fff);
return 0;
}
const char *program_data_config(void)
{
static struct strbuf path = STRBUF_INIT;
static unsigned initialized;
if (!initialized) {
const char *env = mingw_getenv("PROGRAMDATA");
if (env)
strbuf_addf(&path, "%s/Git/config", env);
initialized = 1;
}
return *path.buf ? path.buf : NULL;
}
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