mirror of
https://github.com/git/git.git
synced 2026-03-13 18:33:25 +01:00
3f6ad348ef
Even though the file systems on Windows do not support symbolic links, repositories can still contain information about symbolic links, which is interrogated at many occasions. Without the correct definitions S_ISLNK and S_IFLNK, symbolic link information in the repository is not recognized and treated as corruption.
409 lines
9.7 KiB
C
409 lines
9.7 KiB
C
#ifndef GIT_COMPAT_UTIL_H
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#define GIT_COMPAT_UTIL_H
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#define _FILE_OFFSET_BITS 64
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#ifndef FLEX_ARRAY
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#if defined(__GNUC__) && (__GNUC__ < 3)
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#define FLEX_ARRAY 0
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#else
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#define FLEX_ARRAY /* empty */
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#endif
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#endif
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#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
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#if !defined(__APPLE__) && !defined(__FreeBSD__)
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#define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
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#define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
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#endif
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#define _ALL_SOURCE 1
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#define _GNU_SOURCE 1
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#define _BSD_SOURCE 1
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#include <unistd.h>
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#include <stdio.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <string.h>
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#include <errno.h>
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#include <limits.h>
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#include <sys/param.h>
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#include <sys/types.h>
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#include <dirent.h>
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#include <sys/time.h>
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#include <time.h>
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#include <signal.h>
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//#include <sys/wait.h>
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#include <fnmatch.h>
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//#include <sys/poll.h>
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//#include <sys/socket.h>
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//#include <sys/select.h>
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#include <assert.h>
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#include <regex.h>
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//#include <netinet/in.h>
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//#include <netinet/tcp.h>
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//#include <arpa/inet.h>
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#ifndef NO_ETC_PASSWD
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#include <netdb.h>
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#include <pwd.h>
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#include <inttypes.h>
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#if defined(__CYGWIN__)
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#undef _XOPEN_SOURCE
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#include <grp.h>
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#define _XOPEN_SOURCE 600
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#else
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#undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
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#include <grp.h>
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#define _ALL_SOURCE 1
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#endif
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#endif
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#ifndef NO_ICONV
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#include <iconv.h>
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#endif
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/* On most systems <limits.h> would have given us this, but
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* not on some systems (e.g. GNU/Hurd).
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*/
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#ifndef PATH_MAX
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#define PATH_MAX 4096
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#endif
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#ifdef __GNUC__
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#define NORETURN __attribute__((__noreturn__))
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#else
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#define NORETURN
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#ifndef __attribute__
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#define __attribute__(x)
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#endif
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#endif
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/* General helper functions */
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extern void usage(const char *err) NORETURN;
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extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
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extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
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extern void warn(const char *err, ...) __attribute__((format (printf, 1, 2)));
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extern void set_usage_routine(void (*routine)(const char *err) NORETURN);
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extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
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extern void set_error_routine(void (*routine)(const char *err, va_list params));
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extern void set_warn_routine(void (*routine)(const char *warn, va_list params));
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#ifdef NO_MMAP
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#ifndef PROT_READ
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#define PROT_READ 1
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#define PROT_WRITE 2
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#define MAP_PRIVATE 1
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#define MAP_FAILED ((void*)-1)
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#endif
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#define mmap git_mmap
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#define munmap git_munmap
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extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
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extern int git_munmap(void *start, size_t length);
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/* This value must be multiple of (pagesize * 2) */
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#define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
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#else /* NO_MMAP */
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#include <sys/mman.h>
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/* This value must be multiple of (pagesize * 2) */
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#define DEFAULT_PACKED_GIT_WINDOW_SIZE \
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(sizeof(void*) >= 8 \
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? 1 * 1024 * 1024 * 1024 \
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: 32 * 1024 * 1024)
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#endif /* NO_MMAP */
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#define DEFAULT_PACKED_GIT_LIMIT \
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((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
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#ifdef NO_PREAD
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#define pread git_pread
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extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
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#endif
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#ifdef NO_SETENV
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#define setenv gitsetenv
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extern int gitsetenv(const char *, const char *, int);
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#endif
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#ifdef NO_UNSETENV
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#define unsetenv gitunsetenv
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extern void gitunsetenv(const char *);
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#endif
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#ifdef NO_STRCASESTR
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#define strcasestr gitstrcasestr
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extern char *gitstrcasestr(const char *haystack, const char *needle);
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#endif
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#ifdef NO_STRLCPY
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#define strlcpy gitstrlcpy
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extern size_t gitstrlcpy(char *, const char *, size_t);
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#endif
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#ifdef NO_STRTOUMAX
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#define strtoumax gitstrtoumax
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extern uintmax_t gitstrtoumax(const char *, char **, int);
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#endif
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extern void release_pack_memory(size_t);
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static inline char* xstrdup(const char *str)
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{
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char *ret = strdup(str);
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if (!ret) {
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release_pack_memory(strlen(str) + 1);
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ret = strdup(str);
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if (!ret)
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die("Out of memory, strdup failed");
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}
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return ret;
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}
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static inline void *xmalloc(size_t size)
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{
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void *ret = malloc(size);
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if (!ret && !size)
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ret = malloc(1);
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if (!ret) {
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release_pack_memory(size);
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ret = malloc(size);
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if (!ret && !size)
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ret = malloc(1);
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if (!ret)
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die("Out of memory, malloc failed");
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}
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#ifdef XMALLOC_POISON
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memset(ret, 0xA5, size);
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#endif
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return ret;
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}
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static inline void *xrealloc(void *ptr, size_t size)
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{
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void *ret = realloc(ptr, size);
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if (!ret && !size)
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ret = realloc(ptr, 1);
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if (!ret) {
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release_pack_memory(size);
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ret = realloc(ptr, size);
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if (!ret && !size)
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ret = realloc(ptr, 1);
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if (!ret)
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die("Out of memory, realloc failed");
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}
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return ret;
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}
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static inline void *xcalloc(size_t nmemb, size_t size)
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{
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void *ret = calloc(nmemb, size);
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if (!ret && (!nmemb || !size))
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ret = calloc(1, 1);
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if (!ret) {
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release_pack_memory(nmemb * size);
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ret = calloc(nmemb, size);
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if (!ret && (!nmemb || !size))
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ret = calloc(1, 1);
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if (!ret)
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die("Out of memory, calloc failed");
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}
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return ret;
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}
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static inline void *xmmap(void *start, size_t length,
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int prot, int flags, int fd, off_t offset)
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{
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void *ret = mmap(start, length, prot, flags, fd, offset);
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if (ret == MAP_FAILED) {
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if (!length)
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return NULL;
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release_pack_memory(length);
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ret = mmap(start, length, prot, flags, fd, offset);
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if (ret == MAP_FAILED)
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die("Out of memory? mmap failed: %s", strerror(errno));
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}
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return ret;
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}
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static inline ssize_t xread(int fd, void *buf, size_t len)
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{
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ssize_t nr;
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while (1) {
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nr = read(fd, buf, len);
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if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
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continue;
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return nr;
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}
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}
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static inline ssize_t xwrite(int fd, const void *buf, size_t len)
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{
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ssize_t nr;
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while (1) {
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nr = write(fd, buf, len);
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if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
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continue;
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return nr;
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}
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}
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static inline int has_extension(const char *filename, const char *ext)
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{
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size_t len = strlen(filename);
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size_t extlen = strlen(ext);
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return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
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}
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/* Sane ctype - no locale, and works with signed chars */
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#undef isspace
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#undef isdigit
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#undef isalpha
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#undef isalnum
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#undef tolower
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#undef toupper
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extern unsigned char sane_ctype[256];
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#define GIT_SPACE 0x01
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#define GIT_DIGIT 0x02
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#define GIT_ALPHA 0x04
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#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
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#define isspace(x) sane_istest(x,GIT_SPACE)
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#define isdigit(x) sane_istest(x,GIT_DIGIT)
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#define isalpha(x) sane_istest(x,GIT_ALPHA)
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#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
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#define tolower(x) sane_case((unsigned char)(x), 0x20)
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#define toupper(x) sane_case((unsigned char)(x), 0)
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static inline int sane_case(int x, int high)
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{
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if (sane_istest(x, GIT_ALPHA))
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x = (x & ~0x20) | high;
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return x;
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}
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static inline int prefixcmp(const char *str, const char *prefix)
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{
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return strncmp(str, prefix, strlen(prefix));
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}
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// MinGW
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#ifndef S_ISLNK
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#define S_IFLNK 0120000 /* Symbolic link */
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#define S_ISLNK(x) (((x) & S_IFMT) == S_IFLNK)
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#endif
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#ifndef S_ISGRP
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#define S_ISGRP(x) 0
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#define S_IRGRP 0
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#define S_IWGRP 0
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#define S_IXGRP 0
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#define S_ISGID 0
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#define S_IROTH 0
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#define S_IXOTH 0
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#endif
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int readlink(const char *path, char *buf, size_t bufsiz);
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int symlink(const char *oldpath, const char *newpath);
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#define link symlink
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int fchmod(int fildes, mode_t mode);
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int lstat(const char *file_name, struct stat *buf);
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/* missing: link, mkstemp, fchmod, getuid (?), gettimeofday */
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int socketpair(int d, int type, int protocol, int sv[2]);
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#define AF_UNIX 0
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#define SOCK_STREAM 0
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int syslog(int type, char *bufp, ...);
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#define LOG_ERR 1
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#define LOG_INFO 2
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#define LOG_DAEMON 4
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unsigned int alarm(unsigned int seconds);
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#include <winsock2.h>
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void mingw_execve(const char *cmd, const char **argv, const char **env);
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#define execve mingw_execve
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int fork();
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typedef int pid_t;
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#define waitpid(pid, status, options) \
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((options == 0) ? _cwait((status), (pid), 0) \
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: (errno = EINVAL, -1))
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#define WIFEXITED(x) ((unsigned)(x) < 259) /* STILL_ACTIVE */
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#define WEXITSTATUS(x) ((x) & 0xff)
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#define WIFSIGNALED(x) ((unsigned)(x) > 259)
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#define WTERMSIG(x) (x)
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#define WNOHANG 1
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#define SIGKILL 0
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#define SIGCHLD 0
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#define SIGALRM 0
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#define ECONNABORTED 0
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int kill(pid_t pid, int sig);
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unsigned int sleep (unsigned int __seconds);
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const char *inet_ntop(int af, const void *src,
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char *dst, size_t cnt);
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int mkstemp (char *__template);
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int gettimeofday(struct timeval *tv, void *tz);
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int pipe(int filedes[2]);
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struct pollfd {
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int fd; /* file descriptor */
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short events; /* requested events */
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short revents; /* returned events */
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};
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int poll(struct pollfd *ufds, unsigned int nfds, int timeout);
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#define POLLIN 1
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#define POLLHUP 2
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typedef int siginfo_t;
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struct sigaction {
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void (*sa_handler)(int);
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void (*sa_sigaction)(int, siginfo_t *, void *);
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sigset_t sa_mask;
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int sa_flags;
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void (*sa_restorer)(void);
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};
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#define SA_RESTART 0
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#define ITIMER_REAL 0
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struct itimerval { struct timeval it_interval, it_value; };
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static inline int git_mkdir(const char *path, int mode)
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{
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return mkdir(path);
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}
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#define mkdir git_mkdir
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static inline int git_unlink(const char *pathname) {
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/* read-only files cannot be removed */
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chmod(pathname, 0666);
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return unlink(pathname);
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}
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#define unlink git_unlink
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#include <time.h>
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struct tm *gmtime_r(const time_t *timep, struct tm *result);
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struct tm *localtime_r(const time_t *timep, struct tm *result);
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#define hstrerror strerror
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char *mingw_getcwd(char *pointer, int len);
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#define getcwd mingw_getcwd
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int mingw_socket(int domain, int type, int protocol);
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#define socket mingw_socket
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#define setlinebuf(x)
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#define fsync(x)
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extern void quote_argv(const char **dst, const char **src);
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extern const char *parse_interpreter(const char *cmd);
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#endif
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