1 #ifndef GIT_COMPAT_UTIL_H
2 #define GIT_COMPAT_UTIL_H
4 #define _FILE_OFFSET_BITS 64
7 /* Derived from Linux "Features Test Macro" header
8 * Convenience macros to test the versions of gcc (or
9 * a compatible compiler).
11 * #if GIT_GNUC_PREREQ (2,8)
12 * ... code requiring gcc 2.8 or later ...
15 #if defined(__GNUC__) && defined(__GNUC_MINOR__)
16 # define GIT_GNUC_PREREQ(maj, min) \
17 ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
19 #define GIT_GNUC_PREREQ(maj, min) 0
25 * See if our compiler is known to support flexible array members.
27 #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && (!defined(__SUNPRO_C) || (__SUNPRO_C > 0x580))
28 # define FLEX_ARRAY /* empty */
29 #elif defined(__GNUC__)
31 # define FLEX_ARRAY /* empty */
33 # define FLEX_ARRAY 0 /* older GNU extension */
38 * Otherwise, default to safer but a bit wasteful traditional style
47 * BUILD_ASSERT_OR_ZERO - assert a build-time dependency, as an expression.
48 * @cond: the compile-time condition which must be true.
50 * Your compile will fail if the condition isn't true, or can't be evaluated
51 * by the compiler. This can be used in an expression: its value is "0".
54 * #define foo_to_char(foo) \
56 * + BUILD_ASSERT_OR_ZERO(offsetof(struct foo, string) == 0))
58 #define BUILD_ASSERT_OR_ZERO(cond) \
59 (sizeof(char [1 - 2*!(cond)]) - 1)
61 #if GIT_GNUC_PREREQ(3, 1)
62 /* &arr[0] degrades to a pointer: a different type from an array */
63 # define BARF_UNLESS_AN_ARRAY(arr) \
64 BUILD_ASSERT_OR_ZERO(!__builtin_types_compatible_p(__typeof__(arr), \
65 __typeof__(&(arr)[0])))
67 # define BARF_UNLESS_AN_ARRAY(arr) 0
70 * ARRAY_SIZE - get the number of elements in a visible array
71 * <at> x: the array whose size you want.
73 * This does not work on pointers, or arrays declared as [], or
74 * function parameters. With correct compiler support, such usage
75 * will cause a build error (see the build_assert_or_zero macro).
77 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]) + BARF_UNLESS_AN_ARRAY(x))
79 #define bitsizeof(x) (CHAR_BIT * sizeof(x))
81 #define maximum_signed_value_of_type(a) \
82 (INTMAX_MAX >> (bitsizeof(intmax_t) - bitsizeof(a)))
84 #define maximum_unsigned_value_of_type(a) \
85 (UINTMAX_MAX >> (bitsizeof(uintmax_t) - bitsizeof(a)))
88 * Signed integer overflow is undefined in C, so here's a helper macro
89 * to detect if the sum of two integers will overflow.
91 * Requires: a >= 0, typeof(a) equals typeof(b)
93 #define signed_add_overflows(a, b) \
94 ((b) > maximum_signed_value_of_type(a) - (a))
96 #define unsigned_add_overflows(a, b) \
97 ((b) > maximum_unsigned_value_of_type(a) - (a))
100 #define TYPEOF(x) (__typeof__(x))
105 #define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (bitsizeof(x) - (bits))))
106 #define HAS_MULTI_BITS(i) ((i) & ((i) - 1)) /* checks if an integer has more than 1 bit set */
108 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
110 /* Approximation of the length of the decimal representation of this type. */
111 #define decimal_length(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1)
115 * On Solaris, when _XOPEN_EXTENDED is set, its header file
116 * forces the programs to be XPG4v2, defeating any _XOPEN_SOURCE
117 * setting to say we are XPG5 or XPG6. Also on Solaris,
118 * XPG6 programs must be compiled with a c99 compiler, while
119 * non XPG6 programs must be compiled with a pre-c99 compiler.
121 # if __STDC_VERSION__ - 0 >= 199901L
122 # define _XOPEN_SOURCE 600
124 # define _XOPEN_SOURCE 500
126 #elif !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__USLC__) && \
127 !defined(_M_UNIX) && !defined(__sgi) && !defined(__DragonFly__) && \
128 !defined(__TANDEM) && !defined(__QNX__) && !defined(__MirBSD__) && \
130 #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
131 #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
133 #define _ALL_SOURCE 1
134 #define _GNU_SOURCE 1
135 #define _BSD_SOURCE 1
136 #define _DEFAULT_SOURCE 1
137 #define _NETBSD_SOURCE 1
138 #define _SGI_SOURCE 1
140 #if defined(WIN32) && !defined(__CYGWIN__) /* Both MinGW and MSVC */
141 # if defined (_MSC_VER) && !defined(_WIN32_WINNT)
142 # define _WIN32_WINNT 0x0502
144 #define WIN32_LEAN_AND_MEAN /* stops windows.h including winsock.h */
145 #include <winsock2.h>
147 #define GIT_WINDOWS_NATIVE
152 #include <sys/stat.h>
158 #ifdef HAVE_STRINGS_H
159 #include <strings.h> /* for strcasecmp() */
163 #ifdef NEEDS_SYS_PARAM_H
164 #include <sys/param.h>
166 #include <sys/types.h>
168 #include <sys/time.h>
175 #ifndef NO_SYS_POLL_H
176 #include <sys/poll.h>
180 #ifdef HAVE_BSD_SYSCTL
181 #include <sys/sysctl.h>
184 #if defined(__MINGW32__)
185 /* pull in Windows compatibility stuff */
186 #include "compat/mingw.h"
187 #elif defined(_MSC_VER)
188 #include "compat/msvc.h"
190 #include <sys/utsname.h>
191 #include <sys/wait.h>
192 #include <sys/resource.h>
193 #include <sys/socket.h>
194 #include <sys/ioctl.h>
196 #ifndef NO_SYS_SELECT_H
197 #include <sys/select.h>
199 #include <netinet/in.h>
200 #include <netinet/tcp.h>
201 #include <arpa/inet.h>
205 #ifndef NO_INTTYPES_H
206 #include <inttypes.h>
212 * On I16LP32, ILP32 and LP64 "long" is the save bet, however
213 * on LLP86, IL33LLP64 and P64 it needs to be "long long",
214 * while on IP16 and IP16L32 it is "int" (resp. "short")
215 * Size needs to match (or exceed) 'sizeof(void *)'.
216 * We can't take "long long" here as not everybody has it.
218 typedef long intptr_t;
219 typedef unsigned long uintptr_t;
221 #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
223 #define _ALL_SOURCE 1
226 /* used on Mac OS X */
227 #ifdef PRECOMPOSE_UNICODE
228 #include "compat/precompose_utf8.h"
230 #define precompose_str(in,i_nfd2nfc)
231 #define precompose_argv(c,v)
232 #define probe_utf8_pathname_composition(a,b)
235 #ifdef MKDIR_WO_TRAILING_SLASH
236 #define mkdir(a,b) compat_mkdir_wo_trailing_slash((a),(b))
237 extern int compat_mkdir_wo_trailing_slash(const char*, mode_t);
240 #ifdef NO_STRUCT_ITIMERVAL
242 struct timeval it_interval;
243 struct timeval it_value;
248 #define setitimer(which,value,ovalue)
254 #define basename gitbasename
255 extern char *gitbasename(char *);
264 #define __AVAILABILITY_MACROS_USES_AVAILABILITY 0
265 #include <AvailabilityMacros.h>
266 #undef DEPRECATED_ATTRIBUTE
267 #define DEPRECATED_ATTRIBUTE
268 #undef __AVAILABILITY_MACROS_USES_AVAILABILITY
270 #include <openssl/ssl.h>
271 #include <openssl/err.h>
272 #ifdef NO_HMAC_CTX_CLEANUP
273 #define HMAC_CTX_cleanup HMAC_cleanup
277 /* On most systems <netdb.h> would have given us this, but
278 * not on some systems (e.g. z/OS).
281 #define NI_MAXHOST 1025
285 #define NI_MAXSERV 32
288 /* On most systems <limits.h> would have given us this, but
289 * not on some systems (e.g. GNU/Hurd).
292 #define PATH_MAX 4096
296 #define PRIuMAX "llu"
318 #ifndef _PATH_DEFPATH
319 #define _PATH_DEFPATH "/usr/local/bin:/usr/bin:/bin"
322 #ifndef STRIP_EXTENSION
323 #define STRIP_EXTENSION ""
326 #ifndef has_dos_drive_prefix
327 static inline int git_has_dos_drive_prefix(const char *path)
331 #define has_dos_drive_prefix git_has_dos_drive_prefix
335 static inline int git_is_dir_sep(int c)
339 #define is_dir_sep git_is_dir_sep
342 #ifndef offset_1st_component
343 static inline int git_offset_1st_component(const char *path)
345 return is_dir_sep(path[0]);
347 #define offset_1st_component git_offset_1st_component
350 #ifndef find_last_dir_sep
351 static inline char *git_find_last_dir_sep(const char *path)
353 return strrchr(path, '/');
355 #define find_last_dir_sep git_find_last_dir_sep
358 #if defined(__HP_cc) && (__HP_cc >= 61000)
359 #define NORETURN __attribute__((noreturn))
361 #elif defined(__GNUC__) && !defined(NO_NORETURN)
362 #define NORETURN __attribute__((__noreturn__))
363 #define NORETURN_PTR __attribute__((__noreturn__))
364 #elif defined(_MSC_VER)
365 #define NORETURN __declspec(noreturn)
371 #ifndef __attribute__
372 #define __attribute__(x)
377 /* The sentinel attribute is valid from gcc version 4.0 */
378 #if defined(__GNUC__) && (__GNUC__ >= 4)
379 #define LAST_ARG_MUST_BE_NULL __attribute__((sentinel))
381 #define LAST_ARG_MUST_BE_NULL
384 #include "compat/bswap.h"
386 #include "wildmatch.h"
390 /* General helper functions */
391 extern void vreportf(const char *prefix, const char *err, va_list params);
392 extern void vwritef(int fd, const char *prefix, const char *err, va_list params);
393 extern NORETURN void usage(const char *err);
394 extern NORETURN void usagef(const char *err, ...) __attribute__((format (printf, 1, 2)));
395 extern NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2)));
396 extern NORETURN void die_errno(const char *err, ...) __attribute__((format (printf, 1, 2)));
397 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
398 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
401 #ifdef APPLE_COMMON_CRYPTO
402 #include "compat/apple-common-crypto.h"
404 #include <openssl/evp.h>
405 #include <openssl/hmac.h>
406 #endif /* APPLE_COMMON_CRYPTO */
407 #include <openssl/x509v3.h>
408 #endif /* NO_OPENSSL */
411 * Let callers be aware of the constant return value; this can help
412 * gcc with -Wuninitialized analysis. We restrict this trick to gcc, though,
413 * because some compilers may not support variadic macros. Since we're only
414 * trying to help gcc, anyway, it's OK; other compilers will fall back to
415 * using the function as usual.
417 #if defined(__GNUC__)
418 static inline int const_error(void)
422 #define error(...) (error(__VA_ARGS__), const_error())
425 extern void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params));
426 extern void set_error_routine(void (*routine)(const char *err, va_list params));
427 extern void set_die_is_recursing_routine(int (*routine)(void));
429 extern int starts_with(const char *str, const char *prefix);
432 * If the string "str" begins with the string found in "prefix", return 1.
433 * The "out" parameter is set to "str + strlen(prefix)" (i.e., to the point in
434 * the string right after the prefix).
436 * Otherwise, return 0 and leave "out" untouched.
440 * [extract branch name, fail if not a branch]
441 * if (!skip_prefix(ref, "refs/heads/", &branch)
444 * [skip prefix if present, otherwise use whole string]
445 * skip_prefix(name, "refs/heads/", &name);
447 static inline int skip_prefix(const char *str, const char *prefix,
455 } while (*str++ == *prefix++);
460 * If buf ends with suffix, return 1 and subtract the length of the suffix
461 * from *len. Otherwise, return 0 and leave *len untouched.
463 static inline int strip_suffix_mem(const char *buf, size_t *len,
466 size_t suflen = strlen(suffix);
467 if (*len < suflen || memcmp(buf + (*len - suflen), suffix, suflen))
474 * If str ends with suffix, return 1 and set *len to the size of the string
475 * without the suffix. Otherwise, return 0 and set *len to the size of the
478 * Note that we do _not_ NUL-terminate str to the new length.
480 static inline int strip_suffix(const char *str, const char *suffix, size_t *len)
483 return strip_suffix_mem(str, len, suffix);
486 static inline int ends_with(const char *str, const char *suffix)
489 return strip_suffix(str, suffix, &len);
492 #if defined(NO_MMAP) || defined(USE_WIN32_MMAP)
497 #define MAP_PRIVATE 1
500 #define mmap git_mmap
501 #define munmap git_munmap
502 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
503 extern int git_munmap(void *start, size_t length);
505 #else /* NO_MMAP || USE_WIN32_MMAP */
507 #include <sys/mman.h>
509 #endif /* NO_MMAP || USE_WIN32_MMAP */
513 /* This value must be multiple of (pagesize * 2) */
514 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
518 /* This value must be multiple of (pagesize * 2) */
519 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
520 (sizeof(void*) >= 8 \
521 ? 1 * 1024 * 1024 * 1024 \
527 #define MAP_FAILED ((void *)-1)
530 #ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
531 #define on_disk_bytes(st) ((st).st_size)
533 #define on_disk_bytes(st) ((st).st_blocks * 512)
536 #ifdef NEEDS_MODE_TRANSLATION
545 #define S_IFMT 0170000
546 #define S_IFREG 0100000
547 #define S_IFDIR 0040000
548 #define S_IFLNK 0120000
549 #define S_IFBLK 0060000
550 #define S_IFCHR 0020000
551 #define S_IFIFO 0010000
552 #define S_IFSOCK 0140000
556 #define stat(path, buf) git_stat(path, buf)
557 extern int git_stat(const char *, struct stat *);
561 #define fstat(fd, buf) git_fstat(fd, buf)
562 extern int git_fstat(int, struct stat *);
566 #define lstat(path, buf) git_lstat(path, buf)
567 extern int git_lstat(const char *, struct stat *);
570 #define DEFAULT_PACKED_GIT_LIMIT \
571 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
574 #define pread git_pread
575 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
578 * Forward decl that will remind us if its twin in cache.h changes.
579 * This function is used in compat/pread.c. But we can't include
582 extern ssize_t read_in_full(int fd, void *buf, size_t count);
585 #define setenv gitsetenv
586 extern int gitsetenv(const char *, const char *, int);
590 #define mkdtemp gitmkdtemp
591 extern char *gitmkdtemp(char *);
595 #define mkstemps gitmkstemps
596 extern int gitmkstemps(char *, int);
600 #define unsetenv gitunsetenv
601 extern void gitunsetenv(const char *);
605 #define strcasestr gitstrcasestr
606 extern char *gitstrcasestr(const char *haystack, const char *needle);
610 #define strlcpy gitstrlcpy
611 extern size_t gitstrlcpy(char *, const char *, size_t);
615 #define strtoumax gitstrtoumax
616 extern uintmax_t gitstrtoumax(const char *, char **, int);
617 #define strtoimax gitstrtoimax
618 extern intmax_t gitstrtoimax(const char *, char **, int);
622 #define hstrerror githstrerror
623 extern const char *githstrerror(int herror);
627 #define memmem gitmemmem
628 void *gitmemmem(const void *haystack, size_t haystacklen,
629 const void *needle, size_t needlelen);
632 #ifdef NO_GETPAGESIZE
633 #define getpagesize() sysconf(_SC_PAGESIZE)
636 #ifdef FREAD_READS_DIRECTORIES
640 #define fopen(a,b) git_fopen(a,b)
641 extern FILE *git_fopen(const char*, const char*);
644 #ifdef SNPRINTF_RETURNS_BOGUS
648 #define snprintf git_snprintf
649 extern int git_snprintf(char *str, size_t maxsize,
650 const char *format, ...);
654 #define vsnprintf git_vsnprintf
655 extern int git_vsnprintf(char *str, size_t maxsize,
656 const char *format, va_list ap);
659 #ifdef __GLIBC_PREREQ
660 #if __GLIBC_PREREQ(2, 1)
661 #define HAVE_STRCHRNUL
666 #ifndef HAVE_STRCHRNUL
667 #define strchrnul gitstrchrnul
668 static inline char *gitstrchrnul(const char *s, int c)
670 while (*s && *s != c)
677 #define mempcpy gitmempcpy
678 static inline void *gitmempcpy(void *dest, const void *src, size_t n)
680 return (char *)memcpy(dest, src, n) + n;
685 int inet_pton(int af, const char *src, void *dst);
689 const char *inet_ntop(int af, const void *src, char *dst, size_t size);
693 #define atexit git_atexit
694 extern int git_atexit(void (*handler)(void));
697 extern void release_pack_memory(size_t);
699 typedef void (*try_to_free_t)(size_t);
700 extern try_to_free_t set_try_to_free_routine(try_to_free_t);
704 # define xalloca(size) (alloca(size))
705 # define xalloca_free(p) do {} while (0)
707 # define xalloca(size) (xmalloc(size))
708 # define xalloca_free(p) (free(p))
710 extern char *xstrdup(const char *str);
711 extern void *xmalloc(size_t size);
712 extern void *xmallocz(size_t size);
713 extern void *xmallocz_gently(size_t size);
714 extern void *xmemdupz(const void *data, size_t len);
715 extern char *xstrndup(const char *str, size_t len);
716 extern void *xrealloc(void *ptr, size_t size);
717 extern void *xcalloc(size_t nmemb, size_t size);
718 extern void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
719 extern void *xmmap_gently(void *start, size_t length, int prot, int flags, int fd, off_t offset);
720 extern ssize_t xread(int fd, void *buf, size_t len);
721 extern ssize_t xwrite(int fd, const void *buf, size_t len);
722 extern ssize_t xpread(int fd, void *buf, size_t len, off_t offset);
723 extern int xdup(int fd);
724 extern FILE *xfdopen(int fd, const char *mode);
725 extern int xmkstemp(char *template);
726 extern int xmkstemp_mode(char *template, int mode);
727 extern int odb_mkstemp(char *template, size_t limit, const char *pattern);
728 extern int odb_pack_keep(char *name, size_t namesz, const unsigned char *sha1);
729 extern char *xgetcwd(void);
731 #define REALLOC_ARRAY(x, alloc) (x) = xrealloc((x), (alloc) * sizeof(*(x)))
733 static inline char *xstrdup_or_null(const char *str)
735 return str ? xstrdup(str) : NULL;
738 static inline size_t xsize_t(off_t len)
740 if (len > (size_t) len)
741 die("Cannot handle files this big");
745 /* in ctype.c, for kwset users */
746 extern const unsigned char tolower_trans_tbl[256];
748 /* Sane ctype - no locale, and works with signed chars */
763 extern const unsigned char sane_ctype[256];
764 #define GIT_SPACE 0x01
765 #define GIT_DIGIT 0x02
766 #define GIT_ALPHA 0x04
767 #define GIT_GLOB_SPECIAL 0x08
768 #define GIT_REGEX_SPECIAL 0x10
769 #define GIT_PATHSPEC_MAGIC 0x20
770 #define GIT_CNTRL 0x40
771 #define GIT_PUNCT 0x80
772 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
773 #define isascii(x) (((x) & ~0x7f) == 0)
774 #define isspace(x) sane_istest(x,GIT_SPACE)
775 #define isdigit(x) sane_istest(x,GIT_DIGIT)
776 #define isalpha(x) sane_istest(x,GIT_ALPHA)
777 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
778 #define isprint(x) ((x) >= 0x20 && (x) <= 0x7e)
779 #define islower(x) sane_iscase(x, 1)
780 #define isupper(x) sane_iscase(x, 0)
781 #define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
782 #define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL)
783 #define iscntrl(x) (sane_istest(x,GIT_CNTRL))
784 #define ispunct(x) sane_istest(x, GIT_PUNCT | GIT_REGEX_SPECIAL | \
785 GIT_GLOB_SPECIAL | GIT_PATHSPEC_MAGIC)
786 #define isxdigit(x) (hexval_table[(unsigned char)(x)] != -1)
787 #define tolower(x) sane_case((unsigned char)(x), 0x20)
788 #define toupper(x) sane_case((unsigned char)(x), 0)
789 #define is_pathspec_magic(x) sane_istest(x,GIT_PATHSPEC_MAGIC)
791 static inline int sane_case(int x, int high)
793 if (sane_istest(x, GIT_ALPHA))
794 x = (x & ~0x20) | high;
798 static inline int sane_iscase(int x, int is_lower)
800 if (!sane_istest(x, GIT_ALPHA))
804 return (x & 0x20) != 0;
806 return (x & 0x20) == 0;
809 static inline int strtoul_ui(char const *s, int base, unsigned int *result)
815 ul = strtoul(s, &p, base);
816 if (errno || *p || p == s || (unsigned int) ul != ul)
822 static inline int strtol_i(char const *s, int base, int *result)
828 ul = strtol(s, &p, base);
829 if (errno || *p || p == s || (int) ul != ul)
835 #ifdef INTERNAL_QSORT
836 void git_qsort(void *base, size_t nmemb, size_t size,
837 int(*compar)(const void *, const void *));
838 #define qsort git_qsort
841 #ifndef DIR_HAS_BSD_GROUP_SEMANTICS
842 # define FORCE_DIR_SET_GID S_ISGID
844 # define FORCE_DIR_SET_GID 0
849 #define ST_CTIME_NSEC(st) 0
850 #define ST_MTIME_NSEC(st) 0
852 #ifdef USE_ST_TIMESPEC
853 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
854 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
856 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
857 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
861 #ifdef UNRELIABLE_FSTAT
862 #define fstat_is_reliable() 0
864 #define fstat_is_reliable() 1
869 * Since an obvious implementation of va_list would be to make it a
870 * pointer into the stack frame, a simple assignment will work on
871 * many systems. But let's try to be more portable.
874 #define va_copy(dst, src) __va_copy(dst, src)
876 #define va_copy(dst, src) ((dst) = (src))
880 #if defined(__GNUC__) || (_MSC_VER >= 1400) || defined(__C99_MACRO_WITH_VA_ARGS)
881 #define HAVE_VARIADIC_MACROS 1
885 * Preserves errno, prints a message, but gives no warning for ENOENT.
886 * Returns 0 on success, which includes trying to unlink an object that does
889 int unlink_or_warn(const char *path);
891 * Tries to unlink file. Returns 0 if unlink succeeded
892 * or the file already didn't exist. Returns -1 and
893 * appends a message to err suitable for
894 * 'error("%s", err->buf)' on error.
896 int unlink_or_msg(const char *file, struct strbuf *err);
898 * Preserves errno, prints a message, but gives no warning for ENOENT.
899 * Returns 0 on success, which includes trying to remove a directory that does
902 int rmdir_or_warn(const char *path);
904 * Calls the correct function out of {unlink,rmdir}_or_warn based on
905 * the supplied file mode.
907 int remove_or_warn(unsigned int mode, const char *path);
910 * Call access(2), but warn for any error except "missing file"
911 * (ENOENT or ENOTDIR).
913 #define ACCESS_EACCES_OK (1U << 0)
914 int access_or_warn(const char *path, int mode, unsigned flag);
915 int access_or_die(const char *path, int mode, unsigned flag);
917 /* Warn on an inaccessible file that ought to be accessible */
918 void warn_on_inaccessible(const char *path);
920 /* Get the passwd entry for the UID of the current process. */
921 struct passwd *xgetpwuid_self(void);
923 #ifdef GMTIME_UNRELIABLE_ERRORS
924 struct tm *git_gmtime(const time_t *);
925 struct tm *git_gmtime_r(const time_t *, struct tm *);
926 #define gmtime git_gmtime
927 #define gmtime_r git_gmtime_r
930 #if !defined(USE_PARENS_AROUND_GETTEXT_N) && defined(__GNUC__)
931 #define USE_PARENS_AROUND_GETTEXT_N 1
935 # define SHELL_PATH "/bin/sh"
938 #ifndef _POSIX_THREAD_SAFE_FUNCTIONS
939 #define flockfile(fh)
940 #define funlockfile(fh)
941 #define getc_unlocked(fh) getc(fh)