diff --git a/compat/mingw.c b/compat/mingw.c index 6b5b5b2c70..4b1073d49a 100644 --- a/compat/mingw.c +++ b/compat/mingw.c @@ -1,6 +1,7 @@ #include "../git-compat-util.h" #include "win32.h" #include +#include #include "../strbuf.h" #include @@ -170,6 +171,21 @@ static int do_lstat(const char *file_name, struct stat *buf) buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime)); buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime)); buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime)); + if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) { + WIN32_FIND_DATAA findbuf; + HANDLE handle = FindFirstFileA(file_name, &findbuf); + if (handle != INVALID_HANDLE_VALUE) { + if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) && + (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) { + char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE]; + buf->st_mode = S_IREAD | S_IFLNK; + if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY)) + buf->st_mode |= S_IWRITE; + buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE); + } + FindClose(handle); + } + } return 0; } return -1; @@ -1175,6 +1191,58 @@ int link(const char *oldpath, const char *newpath) return 0; } +int symlink(const char *oldpath, const char *newpath) +{ + typedef BOOL WINAPI (*symlink_fn)(const char*, const char*, DWORD); + static symlink_fn create_symbolic_link = NULL; + if (!create_symbolic_link) { + create_symbolic_link = (symlink_fn) GetProcAddress( + GetModuleHandle("kernel32.dll"), "CreateSymbolicLinkA"); + if (!create_symbolic_link) + create_symbolic_link = (symlink_fn)-1; + } + if (create_symbolic_link == (symlink_fn)-1) { + errno = ENOSYS; + return -1; + } + + if (!create_symbolic_link(newpath, oldpath, 0)) { + errno = err_win_to_posix(GetLastError()); + return -1; + } + return 0; +} + +int readlink(const char *path, char *buf, size_t bufsiz) +{ + HANDLE handle = CreateFile(path, GENERIC_READ, + 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) { + unsigned char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE]; + DWORD dummy = 0; + if (DeviceIoControl(handle, FSCTL_GET_REPARSE_POINT, NULL, 0, buffer, + MAXIMUM_REPARSE_DATA_BUFFER_SIZE, &dummy, NULL)) { + REPARSE_DATA_BUFFER *b = (REPARSE_DATA_BUFFER *) buffer; + if (b->ReparseTag == IO_REPARSE_TAG_SYMLINK) { + int len = b->SymbolicLinkReparseBuffer.SubstituteNameLength / sizeof(wchar_t); + int offset = b->SymbolicLinkReparseBuffer.SubstituteNameOffset / sizeof(wchar_t); + snprintf(buf, bufsiz, "%*ls", len, & b->SymbolicLinkReparseBuffer.PathBuffer[offset]); + CloseHandle(handle); + return len; + } + } + + CloseHandle(handle); + } + + errno = EINVAL; + return -1; +} + char *getpass(const char *prompt) { struct strbuf buf = STRBUF_INIT; @@ -1241,7 +1309,10 @@ struct dirent *mingw_readdir(DIR *dir) /* Set file type, based on WIN32_FIND_DATA */ mdir->dd_dir.d_type = 0; - if (buf.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) + if ((buf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) && + (buf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) + mdir->dd_dir.d_type |= DT_LNK; + else if (buf.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) mdir->dd_dir.d_type |= DT_DIR; else mdir->dd_dir.d_type |= DT_REG; diff --git a/compat/mingw.h b/compat/mingw.h index 5b5258bceb..2779bbb1a7 100644 --- a/compat/mingw.h +++ b/compat/mingw.h @@ -68,10 +68,6 @@ struct itimerval { * trivial stubs */ -static inline int readlink(const char *path, char *buf, size_t bufsiz) -{ errno = ENOSYS; return -1; } -static inline int symlink(const char *oldpath, const char *newpath) -{ errno = ENOSYS; return -1; } static inline int fchmod(int fildes, mode_t mode) { errno = ENOSYS; return -1; } static inline int fork(void) @@ -140,6 +136,8 @@ struct passwd *getpwuid(int uid); int setitimer(int type, struct itimerval *in, struct itimerval *out); int sigaction(int sig, struct sigaction *in, struct sigaction *out); int link(const char *oldpath, const char *newpath); +int symlink(const char *oldpath, const char *newpath); +int readlink(const char *path, char *buf, size_t bufsiz); /* * replacements of existing functions