1#ifndef GIT_COMPAT_UTIL_H
2#define GIT_COMPAT_UTIL_H
3
4#define _FILE_OFFSET_BITS 64
5
6#ifndef FLEX_ARRAY
7/*
8 * See if our compiler is known to support flexible array members.
9 */
10#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && (!defined(__SUNPRO_C) || (__SUNPRO_C > 0x580))
11# define FLEX_ARRAY /* empty */
12#elif defined(__GNUC__)
13# if (__GNUC__ >= 3)
14# define FLEX_ARRAY /* empty */
15# else
16# define FLEX_ARRAY 0 /* older GNU extension */
17# endif
18#endif
19
20/*
21 * Otherwise, default to safer but a bit wasteful traditional style
22 */
23#ifndef FLEX_ARRAY
24# define FLEX_ARRAY 1
25#endif
26#endif
27
28#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
29#define bitsizeof(x) (CHAR_BIT * sizeof(x))
30
31#define maximum_signed_value_of_type(a) \
32 (INTMAX_MAX >> (bitsizeof(intmax_t) - bitsizeof(a)))
33
34#define maximum_unsigned_value_of_type(a) \
35 (UINTMAX_MAX >> (bitsizeof(uintmax_t) - bitsizeof(a)))
36
37/*
38 * Signed integer overflow is undefined in C, so here's a helper macro
39 * to detect if the sum of two integers will overflow.
40 *
41 * Requires: a >= 0, typeof(a) equals typeof(b)
42 */
43#define signed_add_overflows(a, b) \
44 ((b) > maximum_signed_value_of_type(a) - (a))
45
46#define unsigned_add_overflows(a, b) \
47 ((b) > maximum_unsigned_value_of_type(a) - (a))
48
49#ifdef __GNUC__
50#define TYPEOF(x) (__typeof__(x))
51#else
52#define TYPEOF(x)
53#endif
54
55#define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (bitsizeof(x) - (bits))))
56#define HAS_MULTI_BITS(i) ((i) & ((i) - 1)) /* checks if an integer has more than 1 bit set */
57
58#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
59
60/* Approximation of the length of the decimal representation of this type. */
61#define decimal_length(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1)
62
63#if defined(__sun__)
64 /*
65 * On Solaris, when _XOPEN_EXTENDED is set, its header file
66 * forces the programs to be XPG4v2, defeating any _XOPEN_SOURCE
67 * setting to say we are XPG5 or XPG6. Also on Solaris,
68 * XPG6 programs must be compiled with a c99 compiler, while
69 * non XPG6 programs must be compiled with a pre-c99 compiler.
70 */
71# if __STDC_VERSION__ - 0 >= 199901L
72# define _XOPEN_SOURCE 600
73# else
74# define _XOPEN_SOURCE 500
75# endif
76#elif !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__USLC__) && \
77 !defined(_M_UNIX) && !defined(__sgi) && !defined(__DragonFly__) && \
78 !defined(__TANDEM) && !defined(__QNX__) && !defined(__MirBSD__)
79#define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
80#define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
81#endif
82#define _ALL_SOURCE 1
83#define _GNU_SOURCE 1
84#define _BSD_SOURCE 1
85#define _NETBSD_SOURCE 1
86#define _SGI_SOURCE 1
87
88#if defined(WIN32) && !defined(__CYGWIN__) /* Both MinGW and MSVC */
89# if defined (_MSC_VER) && !defined(_WIN32_WINNT)
90# define _WIN32_WINNT 0x0502
91# endif
92#define WIN32_LEAN_AND_MEAN /* stops windows.h including winsock.h */
93#include <winsock2.h>
94#include <windows.h>
95#define GIT_WINDOWS_NATIVE
96#endif
97
98#include <unistd.h>
99#include <stdio.h>
100#include <sys/stat.h>
101#include <fcntl.h>
102#include <stddef.h>
103#include <stdlib.h>
104#include <stdarg.h>
105#include <string.h>
106#ifdef HAVE_STRINGS_H
107#include <strings.h> /* for strcasecmp() */
108#endif
109#include <errno.h>
110#include <limits.h>
111#ifdef NEEDS_SYS_PARAM_H
112#include <sys/param.h>
113#endif
114#include <sys/types.h>
115#include <dirent.h>
116#include <sys/time.h>
117#include <time.h>
118#include <signal.h>
119#include <assert.h>
120#include <regex.h>
121#include <utime.h>
122#include <syslog.h>
123#ifndef NO_SYS_POLL_H
124#include <sys/poll.h>
125#else
126#include <poll.h>
127#endif
128
129#if defined(__MINGW32__)
130/* pull in Windows compatibility stuff */
131#include "compat/mingw.h"
132#elif defined(_MSC_VER)
133#include "compat/msvc.h"
134#else
135#include <sys/wait.h>
136#include <sys/resource.h>
137#include <sys/socket.h>
138#include <sys/ioctl.h>
139#include <termios.h>
140#ifndef NO_SYS_SELECT_H
141#include <sys/select.h>
142#endif
143#include <netinet/in.h>
144#include <netinet/tcp.h>
145#include <arpa/inet.h>
146#include <netdb.h>
147#include <pwd.h>
148#include <sys/un.h>
149#ifndef NO_INTTYPES_H
150#include <inttypes.h>
151#else
152#include <stdint.h>
153#endif
154#ifdef NO_INTPTR_T
155/*
156 * On I16LP32, ILP32 and LP64 "long" is the save bet, however
157 * on LLP86, IL33LLP64 and P64 it needs to be "long long",
158 * while on IP16 and IP16L32 it is "int" (resp. "short")
159 * Size needs to match (or exceed) 'sizeof(void *)'.
160 * We can't take "long long" here as not everybody has it.
161 */
162typedef long intptr_t;
163typedef unsigned long uintptr_t;
164#endif
165#if defined(__CYGWIN__)
166#undef _XOPEN_SOURCE
167#include <grp.h>
168#define _XOPEN_SOURCE 600
169#else
170#undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
171#include <grp.h>
172#define _ALL_SOURCE 1
173#endif
174#endif
175
176/* used on Mac OS X */
177#ifdef PRECOMPOSE_UNICODE
178#include "compat/precompose_utf8.h"
179#else
180#define precompose_str(in,i_nfd2nfc)
181#define precompose_argv(c,v)
182#define probe_utf8_pathname_composition(a,b)
183#endif
184
185#ifdef MKDIR_WO_TRAILING_SLASH
186#define mkdir(a,b) compat_mkdir_wo_trailing_slash((a),(b))
187extern int compat_mkdir_wo_trailing_slash(const char*, mode_t);
188#endif
189
190#ifdef NO_STRUCT_ITIMERVAL
191struct itimerval {
192 struct timeval it_interval;
193 struct timeval it_value;
194}
195#endif
196
197#ifdef NO_SETITIMER
198#define setitimer(which,value,ovalue)
199#endif
200
201#ifndef NO_LIBGEN_H
202#include <libgen.h>
203#else
204#define basename gitbasename
205extern char *gitbasename(char *);
206#endif
207
208#ifndef NO_ICONV
209#include <iconv.h>
210#endif
211
212#ifndef NO_OPENSSL
213#include <openssl/ssl.h>
214#include <openssl/err.h>
215#endif
216
217/* On most systems <netdb.h> would have given us this, but
218 * not on some systems (e.g. z/OS).
219 */
220#ifndef NI_MAXHOST
221#define NI_MAXHOST 1025
222#endif
223
224#ifndef NI_MAXSERV
225#define NI_MAXSERV 32
226#endif
227
228/* On most systems <limits.h> would have given us this, but
229 * not on some systems (e.g. GNU/Hurd).
230 */
231#ifndef PATH_MAX
232#define PATH_MAX 4096
233#endif
234
235#ifndef PRIuMAX
236#define PRIuMAX "llu"
237#endif
238
239#ifndef PRIu32
240#define PRIu32 "u"
241#endif
242
243#ifndef PRIx32
244#define PRIx32 "x"
245#endif
246
247#ifndef PRIo32
248#define PRIo32 "o"
249#endif
250
251#ifndef PATH_SEP
252#define PATH_SEP ':'
253#endif
254
255#ifdef HAVE_PATHS_H
256#include <paths.h>
257#endif
258#ifndef _PATH_DEFPATH
259#define _PATH_DEFPATH "/usr/local/bin:/usr/bin:/bin"
260#endif
261
262#ifndef STRIP_EXTENSION
263#define STRIP_EXTENSION ""
264#endif
265
266#ifndef has_dos_drive_prefix
267#define has_dos_drive_prefix(path) 0
268#endif
269
270#ifndef is_dir_sep
271#define is_dir_sep(c) ((c) == '/')
272#endif
273
274#ifndef find_last_dir_sep
275#define find_last_dir_sep(path) strrchr(path, '/')
276#endif
277
278#if defined(__HP_cc) && (__HP_cc >= 61000)
279#define NORETURN __attribute__((noreturn))
280#define NORETURN_PTR
281#elif defined(__GNUC__) && !defined(NO_NORETURN)
282#define NORETURN __attribute__((__noreturn__))
283#define NORETURN_PTR __attribute__((__noreturn__))
284#elif defined(_MSC_VER)
285#define NORETURN __declspec(noreturn)
286#define NORETURN_PTR
287#else
288#define NORETURN
289#define NORETURN_PTR
290#ifndef __attribute__
291#define __attribute__(x)
292#endif
293#endif
294
295/* The sentinel attribute is valid from gcc version 4.0 */
296#if defined(__GNUC__) && (__GNUC__ >= 4)
297#define LAST_ARG_MUST_BE_NULL __attribute__((sentinel))
298#else
299#define LAST_ARG_MUST_BE_NULL
300#endif
301
302#include "compat/bswap.h"
303
304#include "wildmatch.h"
305
306/* General helper functions */
307extern void vreportf(const char *prefix, const char *err, va_list params);
308extern void vwritef(int fd, const char *prefix, const char *err, va_list params);
309extern NORETURN void usage(const char *err);
310extern NORETURN void usagef(const char *err, ...) __attribute__((format (printf, 1, 2)));
311extern NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2)));
312extern NORETURN void die_errno(const char *err, ...) __attribute__((format (printf, 1, 2)));
313extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
314extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
315
316#ifndef NO_OPENSSL
317#ifdef APPLE_COMMON_CRYPTO
318#include "compat/apple-common-crypto.h"
319#else
320#include <openssl/evp.h>
321#include <openssl/hmac.h>
322#endif /* APPLE_COMMON_CRYPTO */
323#include <openssl/x509v3.h>
324#endif /* NO_OPENSSL */
325
326/*
327 * Let callers be aware of the constant return value; this can help
328 * gcc with -Wuninitialized analysis. We restrict this trick to gcc, though,
329 * because some compilers may not support variadic macros. Since we're only
330 * trying to help gcc, anyway, it's OK; other compilers will fall back to
331 * using the function as usual.
332 */
333#if defined(__GNUC__) && ! defined(__clang__)
334#define error(...) (error(__VA_ARGS__), -1)
335#endif
336
337extern void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params));
338extern void set_error_routine(void (*routine)(const char *err, va_list params));
339extern void set_die_is_recursing_routine(int (*routine)(void));
340
341extern int starts_with(const char *str, const char *prefix);
342extern int ends_with(const char *str, const char *suffix);
343
344static inline const char *skip_prefix(const char *str, const char *prefix)
345{
346 size_t len = strlen(prefix);
347 return strncmp(str, prefix, len) ? NULL : str + len;
348}
349
350#if defined(NO_MMAP) || defined(USE_WIN32_MMAP)
351
352#ifndef PROT_READ
353#define PROT_READ 1
354#define PROT_WRITE 2
355#define MAP_PRIVATE 1
356#endif
357
358#define mmap git_mmap
359#define munmap git_munmap
360extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
361extern int git_munmap(void *start, size_t length);
362
363#else /* NO_MMAP || USE_WIN32_MMAP */
364
365#include <sys/mman.h>
366
367#endif /* NO_MMAP || USE_WIN32_MMAP */
368
369#ifdef NO_MMAP
370
371/* This value must be multiple of (pagesize * 2) */
372#define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
373
374#else /* NO_MMAP */
375
376/* This value must be multiple of (pagesize * 2) */
377#define DEFAULT_PACKED_GIT_WINDOW_SIZE \
378 (sizeof(void*) >= 8 \
379 ? 1 * 1024 * 1024 * 1024 \
380 : 32 * 1024 * 1024)
381
382#endif /* NO_MMAP */
383
384#ifndef MAP_FAILED
385#define MAP_FAILED ((void *)-1)
386#endif
387
388#ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
389#define on_disk_bytes(st) ((st).st_size)
390#else
391#define on_disk_bytes(st) ((st).st_blocks * 512)
392#endif
393
394#define DEFAULT_PACKED_GIT_LIMIT \
395 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
396
397#ifdef NO_PREAD
398#define pread git_pread
399extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
400#endif
401/*
402 * Forward decl that will remind us if its twin in cache.h changes.
403 * This function is used in compat/pread.c. But we can't include
404 * cache.h there.
405 */
406extern ssize_t read_in_full(int fd, void *buf, size_t count);
407
408#ifdef NO_SETENV
409#define setenv gitsetenv
410extern int gitsetenv(const char *, const char *, int);
411#endif
412
413#ifdef NO_MKDTEMP
414#define mkdtemp gitmkdtemp
415extern char *gitmkdtemp(char *);
416#endif
417
418#ifdef NO_MKSTEMPS
419#define mkstemps gitmkstemps
420extern int gitmkstemps(char *, int);
421#endif
422
423#ifdef NO_UNSETENV
424#define unsetenv gitunsetenv
425extern void gitunsetenv(const char *);
426#endif
427
428#ifdef NO_STRCASESTR
429#define strcasestr gitstrcasestr
430extern char *gitstrcasestr(const char *haystack, const char *needle);
431#endif
432
433#ifdef NO_STRLCPY
434#define strlcpy gitstrlcpy
435extern size_t gitstrlcpy(char *, const char *, size_t);
436#endif
437
438#ifdef NO_STRTOUMAX
439#define strtoumax gitstrtoumax
440extern uintmax_t gitstrtoumax(const char *, char **, int);
441#define strtoimax gitstrtoimax
442extern intmax_t gitstrtoimax(const char *, char **, int);
443#endif
444
445#ifdef NO_HSTRERROR
446#define hstrerror githstrerror
447extern const char *githstrerror(int herror);
448#endif
449
450#ifdef NO_MEMMEM
451#define memmem gitmemmem
452void *gitmemmem(const void *haystack, size_t haystacklen,
453 const void *needle, size_t needlelen);
454#endif
455
456#ifdef NO_GETPAGESIZE
457#define getpagesize() sysconf(_SC_PAGESIZE)
458#endif
459
460#ifdef FREAD_READS_DIRECTORIES
461#ifdef fopen
462#undef fopen
463#endif
464#define fopen(a,b) git_fopen(a,b)
465extern FILE *git_fopen(const char*, const char*);
466#endif
467
468#ifdef SNPRINTF_RETURNS_BOGUS
469#ifdef snprintf
470#undef snprintf
471#endif
472#define snprintf git_snprintf
473extern int git_snprintf(char *str, size_t maxsize,
474 const char *format, ...);
475#ifdef vsnprintf
476#undef vsnprintf
477#endif
478#define vsnprintf git_vsnprintf
479extern int git_vsnprintf(char *str, size_t maxsize,
480 const char *format, va_list ap);
481#endif
482
483#ifdef __GLIBC_PREREQ
484#if __GLIBC_PREREQ(2, 1)
485#define HAVE_STRCHRNUL
486#define HAVE_MEMPCPY
487#endif
488#endif
489
490#ifndef HAVE_STRCHRNUL
491#define strchrnul gitstrchrnul
492static inline char *gitstrchrnul(const char *s, int c)
493{
494 while (*s && *s != c)
495 s++;
496 return (char *)s;
497}
498#endif
499
500#ifndef HAVE_MEMPCPY
501#define mempcpy gitmempcpy
502static inline void *gitmempcpy(void *dest, const void *src, size_t n)
503{
504 return (char *)memcpy(dest, src, n) + n;
505}
506#endif
507
508#ifdef NO_INET_PTON
509int inet_pton(int af, const char *src, void *dst);
510#endif
511
512#ifdef NO_INET_NTOP
513const char *inet_ntop(int af, const void *src, char *dst, size_t size);
514#endif
515
516extern void release_pack_memory(size_t);
517
518typedef void (*try_to_free_t)(size_t);
519extern try_to_free_t set_try_to_free_routine(try_to_free_t);
520
521extern char *xstrdup(const char *str);
522extern void *xmalloc(size_t size);
523extern void *xmallocz(size_t size);
524extern void *xmemdupz(const void *data, size_t len);
525extern char *xstrndup(const char *str, size_t len);
526extern void *xrealloc(void *ptr, size_t size);
527extern void *xcalloc(size_t nmemb, size_t size);
528extern void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
529extern ssize_t xread(int fd, void *buf, size_t len);
530extern ssize_t xwrite(int fd, const void *buf, size_t len);
531extern int xdup(int fd);
532extern FILE *xfdopen(int fd, const char *mode);
533extern int xmkstemp(char *template);
534extern int xmkstemp_mode(char *template, int mode);
535extern int odb_mkstemp(char *template, size_t limit, const char *pattern);
536extern int odb_pack_keep(char *name, size_t namesz, unsigned char *sha1);
537
538static inline size_t xsize_t(off_t len)
539{
540 if (len > (size_t) len)
541 die("Cannot handle files this big");
542 return (size_t)len;
543}
544
545static inline int has_extension(const char *filename, const char *ext)
546{
547 size_t len = strlen(filename);
548 size_t extlen = strlen(ext);
549 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
550}
551
552/* in ctype.c, for kwset users */
553extern const char tolower_trans_tbl[256];
554
555/* Sane ctype - no locale, and works with signed chars */
556#undef isascii
557#undef isspace
558#undef isdigit
559#undef isalpha
560#undef isalnum
561#undef isprint
562#undef islower
563#undef isupper
564#undef tolower
565#undef toupper
566#undef iscntrl
567#undef ispunct
568#undef isxdigit
569
570extern const unsigned char sane_ctype[256];
571#define GIT_SPACE 0x01
572#define GIT_DIGIT 0x02
573#define GIT_ALPHA 0x04
574#define GIT_GLOB_SPECIAL 0x08
575#define GIT_REGEX_SPECIAL 0x10
576#define GIT_PATHSPEC_MAGIC 0x20
577#define GIT_CNTRL 0x40
578#define GIT_PUNCT 0x80
579#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
580#define isascii(x) (((x) & ~0x7f) == 0)
581#define isspace(x) sane_istest(x,GIT_SPACE)
582#define isdigit(x) sane_istest(x,GIT_DIGIT)
583#define isalpha(x) sane_istest(x,GIT_ALPHA)
584#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
585#define isprint(x) ((x) >= 0x20 && (x) <= 0x7e)
586#define islower(x) sane_iscase(x, 1)
587#define isupper(x) sane_iscase(x, 0)
588#define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
589#define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL)
590#define iscntrl(x) (sane_istest(x,GIT_CNTRL))
591#define ispunct(x) sane_istest(x, GIT_PUNCT | GIT_REGEX_SPECIAL | \
592 GIT_GLOB_SPECIAL | GIT_PATHSPEC_MAGIC)
593#define isxdigit(x) (hexval_table[x] != -1)
594#define tolower(x) sane_case((unsigned char)(x), 0x20)
595#define toupper(x) sane_case((unsigned char)(x), 0)
596#define is_pathspec_magic(x) sane_istest(x,GIT_PATHSPEC_MAGIC)
597
598static inline int sane_case(int x, int high)
599{
600 if (sane_istest(x, GIT_ALPHA))
601 x = (x & ~0x20) | high;
602 return x;
603}
604
605static inline int sane_iscase(int x, int is_lower)
606{
607 if (!sane_istest(x, GIT_ALPHA))
608 return 0;
609
610 if (is_lower)
611 return (x & 0x20) != 0;
612 else
613 return (x & 0x20) == 0;
614}
615
616static inline int strtoul_ui(char const *s, int base, unsigned int *result)
617{
618 unsigned long ul;
619 char *p;
620
621 errno = 0;
622 ul = strtoul(s, &p, base);
623 if (errno || *p || p == s || (unsigned int) ul != ul)
624 return -1;
625 *result = ul;
626 return 0;
627}
628
629static inline int strtol_i(char const *s, int base, int *result)
630{
631 long ul;
632 char *p;
633
634 errno = 0;
635 ul = strtol(s, &p, base);
636 if (errno || *p || p == s || (int) ul != ul)
637 return -1;
638 *result = ul;
639 return 0;
640}
641
642#ifdef INTERNAL_QSORT
643void git_qsort(void *base, size_t nmemb, size_t size,
644 int(*compar)(const void *, const void *));
645#define qsort git_qsort
646#endif
647
648#ifndef DIR_HAS_BSD_GROUP_SEMANTICS
649# define FORCE_DIR_SET_GID S_ISGID
650#else
651# define FORCE_DIR_SET_GID 0
652#endif
653
654#ifdef NO_NSEC
655#undef USE_NSEC
656#define ST_CTIME_NSEC(st) 0
657#define ST_MTIME_NSEC(st) 0
658#else
659#ifdef USE_ST_TIMESPEC
660#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
661#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
662#else
663#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
664#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
665#endif
666#endif
667
668#ifdef UNRELIABLE_FSTAT
669#define fstat_is_reliable() 0
670#else
671#define fstat_is_reliable() 1
672#endif
673
674#ifndef va_copy
675/*
676 * Since an obvious implementation of va_list would be to make it a
677 * pointer into the stack frame, a simple assignment will work on
678 * many systems. But let's try to be more portable.
679 */
680#ifdef __va_copy
681#define va_copy(dst, src) __va_copy(dst, src)
682#else
683#define va_copy(dst, src) ((dst) = (src))
684#endif
685#endif
686
687/*
688 * Preserves errno, prints a message, but gives no warning for ENOENT.
689 * Always returns the return value of unlink(2).
690 */
691int unlink_or_warn(const char *path);
692/*
693 * Likewise for rmdir(2).
694 */
695int rmdir_or_warn(const char *path);
696/*
697 * Calls the correct function out of {unlink,rmdir}_or_warn based on
698 * the supplied file mode.
699 */
700int remove_or_warn(unsigned int mode, const char *path);
701
702/*
703 * Call access(2), but warn for any error except "missing file"
704 * (ENOENT or ENOTDIR).
705 */
706#define ACCESS_EACCES_OK (1U << 0)
707int access_or_warn(const char *path, int mode, unsigned flag);
708int access_or_die(const char *path, int mode, unsigned flag);
709
710/* Warn on an inaccessible file that ought to be accessible */
711void warn_on_inaccessible(const char *path);
712
713/* Get the passwd entry for the UID of the current process. */
714struct passwd *xgetpwuid_self(void);
715
716#endif