make poll() work on platforms that can't recv() on a non-socket
[git/git.git] / git-compat-util.h
CommitLineData
4050c0df
JH
1#ifndef GIT_COMPAT_UTIL_H
2#define GIT_COMPAT_UTIL_H
3
b97e9116
MW
4#define _FILE_OFFSET_BITS 64
5
8f1d2e6f 6#ifndef FLEX_ARRAY
8e973991
JH
7/*
8 * See if our compiler is known to support flexible array members.
9 */
203ee91f 10#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && (!defined(__SUNPRO_C) || (__SUNPRO_C > 0x580))
8e973991
JH
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
8f1d2e6f
JH
25#endif
26#endif
27
b4f2a6ac 28#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
f630cfda 29#define bitsizeof(x) (CHAR_BIT * sizeof(x))
b4f2a6ac 30
c03c8315
EFL
31#define maximum_signed_value_of_type(a) \
32 (INTMAX_MAX >> (bitsizeof(intmax_t) - bitsizeof(a)))
33
1368f650
JN
34#define maximum_unsigned_value_of_type(a) \
35 (UINTMAX_MAX >> (bitsizeof(uintmax_t) - bitsizeof(a)))
36
c03c8315
EFL
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
1368f650
JN
46#define unsigned_add_overflows(a, b) \
47 ((b) > maximum_unsigned_value_of_type(a) - (a))
48
8723f216
NP
49#ifdef __GNUC__
50#define TYPEOF(x) (__typeof__(x))
51#else
52#define TYPEOF(x)
53#endif
54
f630cfda 55#define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (bitsizeof(x) - (bits))))
db7244bd 56#define HAS_MULTI_BITS(i) ((i) & ((i) - 1)) /* checks if an integer has more than 1 bit set */
8723f216 57
98cb6f30
PH
58#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
59
cf606e3d
AW
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
4cb18a49
BC
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
6555b196 76#elif !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__USLC__) && \
761a889a 77 !defined(_M_UNIX) && !defined(__sgi) && !defined(__DragonFly__)
85023577
JH
78#define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
79#define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
c902c9a6 80#endif
fb952206
JR
81#define _ALL_SOURCE 1
82#define _GNU_SOURCE 1
83#define _BSD_SOURCE 1
9a695fbf 84#define _NETBSD_SOURCE 1
9398b859 85#define _SGI_SOURCE 1
85023577 86
435bdf8c
MSO
87#ifdef WIN32 /* Both MinGW and MSVC */
88#define WIN32_LEAN_AND_MEAN /* stops windows.h including winsock.h */
89#include <winsock2.h>
90#include <windows.h>
91#endif
92
4050c0df
JH
93#include <unistd.h>
94#include <stdio.h>
95#include <sys/stat.h>
96#include <fcntl.h>
97#include <stddef.h>
98#include <stdlib.h>
99#include <stdarg.h>
100#include <string.h>
101#include <errno.h>
102#include <limits.h>
103#include <sys/param.h>
4050c0df
JH
104#include <sys/types.h>
105#include <dirent.h>
85023577
JH
106#include <sys/time.h>
107#include <time.h>
108#include <signal.h>
85023577 109#include <fnmatch.h>
f4626df5
JS
110#include <assert.h>
111#include <regex.h>
112#include <utime.h>
088d8802 113#include <syslog.h>
2844923d 114#ifndef NO_SYS_POLL_H
fdc12114 115#include <sys/poll.h>
2844923d
MD
116#else
117#include <poll.h>
118#endif
cfc755d3
VR
119#if defined(__MINGW32__)
120/* pull in Windows compatibility stuff */
121#include "compat/mingw.h"
122#elif defined(_MSC_VER)
123#include "compat/msvc.h"
124#else
f4626df5 125#include <sys/wait.h>
ebae9ff9 126#include <sys/resource.h>
85023577 127#include <sys/socket.h>
80bbe72b 128#include <sys/ioctl.h>
eb80042c 129#include <termios.h>
2600973f 130#ifndef NO_SYS_SELECT_H
80bbe72b 131#include <sys/select.h>
2600973f 132#endif
85023577
JH
133#include <netinet/in.h>
134#include <netinet/tcp.h>
135#include <arpa/inet.h>
136#include <netdb.h>
137#include <pwd.h>
e2770979 138#include <sys/un.h>
2844923d 139#ifndef NO_INTTYPES_H
007e2ba6 140#include <inttypes.h>
2844923d
MD
141#else
142#include <stdint.h>
143#endif
41b20017
RJ
144#if defined(__CYGWIN__)
145#undef _XOPEN_SOURCE
146#include <grp.h>
147#define _XOPEN_SOURCE 600
adbc0b6b 148#include "compat/cygwin.h"
41b20017 149#else
fb952206 150#undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
85023577 151#include <grp.h>
fb952206 152#define _ALL_SOURCE 1
41b20017 153#endif
d75f8e61 154#endif
85023577 155
76759c7d
TB
156/* used on Mac OS X */
157#ifdef PRECOMPOSE_UNICODE
158#include "compat/precompose_utf8.h"
159#else
160#define precompose_str(in,i_nfd2nfc)
161#define precompose_argv(c,v)
162#define probe_utf8_pathname_composition(a,b)
163#endif
164
0539ecfd
JS
165#ifdef MKDIR_WO_TRAILING_SLASH
166#define mkdir(a,b) compat_mkdir_wo_trailing_slash((a),(b))
167extern int compat_mkdir_wo_trailing_slash(const char*, mode_t);
168#endif
169
7f9e848c
JS
170#ifdef NO_STRUCT_ITIMERVAL
171struct itimerval {
172 struct timeval it_interval;
173 struct timeval it_value;
174}
175#endif
176
177#ifdef NO_SETITIMER
178#define setitimer(which,value,ovalue)
179#endif
180
e1c06886
DA
181#ifndef NO_LIBGEN_H
182#include <libgen.h>
183#else
184#define basename gitbasename
185extern char *gitbasename(char *);
186#endif
187
85023577
JH
188#ifndef NO_ICONV
189#include <iconv.h>
190#endif
4050c0df 191
684ec6c6
RS
192#ifndef NO_OPENSSL
193#include <openssl/ssl.h>
194#include <openssl/err.h>
195#endif
196
d0c2449f
JH
197/* On most systems <limits.h> would have given us this, but
198 * not on some systems (e.g. GNU/Hurd).
199 */
200#ifndef PATH_MAX
201#define PATH_MAX 4096
202#endif
203
c4001d92
SP
204#ifndef PRIuMAX
205#define PRIuMAX "llu"
206#endif
207
607bb3ff
JS
208#ifndef PRIu32
209#define PRIu32 "u"
210#endif
211
212#ifndef PRIx32
213#define PRIx32 "x"
214#endif
215
5418d96d
RJ
216#ifndef PRIo32
217#define PRIo32 "o"
218#endif
219
80ba074f
JS
220#ifndef PATH_SEP
221#define PATH_SEP ':'
222#endif
223
cb6a22c0
CW
224#ifdef HAVE_PATHS_H
225#include <paths.h>
226#endif
227#ifndef _PATH_DEFPATH
228#define _PATH_DEFPATH "/usr/local/bin:/usr/bin:/bin"
229#endif
230
23326d14
JS
231#ifndef STRIP_EXTENSION
232#define STRIP_EXTENSION ""
233#endif
234
25fe217b
JS
235#ifndef has_dos_drive_prefix
236#define has_dos_drive_prefix(path) 0
237#endif
238
239#ifndef is_dir_sep
240#define is_dir_sep(c) ((c) == '/')
241#endif
242
d1c69255
TN
243#ifndef find_last_dir_sep
244#define find_last_dir_sep(path) strrchr(path, '/')
245#endif
246
e4ac953b 247#if defined(__HP_cc) && (__HP_cc >= 61000)
b6ab349b
MR
248#define NORETURN __attribute__((noreturn))
249#define NORETURN_PTR
6520c846 250#elif defined(__GNUC__) && !defined(NO_NORETURN)
4050c0df 251#define NORETURN __attribute__((__noreturn__))
18660bc9 252#define NORETURN_PTR __attribute__((__noreturn__))
aba7dea8
RJ
253#elif defined(_MSC_VER)
254#define NORETURN __declspec(noreturn)
255#define NORETURN_PTR
4050c0df
JH
256#else
257#define NORETURN
18660bc9 258#define NORETURN_PTR
4050c0df
JH
259#ifndef __attribute__
260#define __attribute__(x)
261#endif
262#endif
263
51ea5519
NP
264#include "compat/bswap.h"
265
4050c0df 266/* General helper functions */
ebaa79f4 267extern void vreportf(const char *prefix, const char *err, va_list params);
3bc4181f 268extern void vwritef(int fd, const char *prefix, const char *err, va_list params);
a4f3131c 269extern NORETURN void usage(const char *err);
64b1cb74 270extern NORETURN void usagef(const char *err, ...) __attribute__((format (printf, 1, 2)));
a4f3131c
EFL
271extern NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2)));
272extern NORETURN void die_errno(const char *err, ...) __attribute__((format (printf, 1, 2)));
4050c0df 273extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
46efd2d9 274extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
4050c0df 275
18660bc9 276extern void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params));
3bc4181f 277extern void set_error_routine(void (*routine)(const char *err, va_list params));
39a3f5ea 278
698a68be 279extern int prefixcmp(const char *str, const char *prefix);
8cc5b290 280extern int suffixcmp(const char *str, const char *suffix);
698a68be 281
fbca5837
MV
282static inline const char *skip_prefix(const char *str, const char *prefix)
283{
284 size_t len = strlen(prefix);
285 return strncmp(str, prefix, len) ? NULL : str + len;
286}
287
b130a72b 288#if defined(NO_MMAP) || defined(USE_WIN32_MMAP)
4050c0df
JH
289
290#ifndef PROT_READ
291#define PROT_READ 1
292#define PROT_WRITE 2
293#define MAP_PRIVATE 1
4050c0df
JH
294#endif
295
d6779124
SP
296#define mmap git_mmap
297#define munmap git_munmap
298extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
299extern int git_munmap(void *start, size_t length);
4050c0df 300
b130a72b
JL
301#else /* NO_MMAP || USE_WIN32_MMAP */
302
303#include <sys/mman.h>
304
305#endif /* NO_MMAP || USE_WIN32_MMAP */
306
307#ifdef NO_MMAP
308
5faaf246 309/* This value must be multiple of (pagesize * 2) */
8c82534d
SP
310#define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
311
4050c0df
JH
312#else /* NO_MMAP */
313
5faaf246 314/* This value must be multiple of (pagesize * 2) */
22bac0ea
SP
315#define DEFAULT_PACKED_GIT_WINDOW_SIZE \
316 (sizeof(void*) >= 8 \
317 ? 1 * 1024 * 1024 * 1024 \
318 : 32 * 1024 * 1024)
4050c0df
JH
319
320#endif /* NO_MMAP */
321
fcf3a21a
GV
322#ifndef MAP_FAILED
323#define MAP_FAILED ((void *)-1)
324#endif
325
fdb2a2a6
JH
326#ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
327#define on_disk_bytes(st) ((st).st_size)
328#else
329#define on_disk_bytes(st) ((st).st_blocks * 512)
330#endif
331
22bac0ea 332#define DEFAULT_PACKED_GIT_LIMIT \
ecaebf4a 333 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
8c82534d 334
6900679c
SH
335#ifdef NO_PREAD
336#define pread git_pread
337extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
338#endif
14086b0a
SP
339/*
340 * Forward decl that will remind us if its twin in cache.h changes.
341 * This function is used in compat/pread.c. But we can't include
342 * cache.h there.
343 */
344extern ssize_t read_in_full(int fd, void *buf, size_t count);
6900679c 345
4050c0df
JH
346#ifdef NO_SETENV
347#define setenv gitsetenv
348extern int gitsetenv(const char *, const char *, int);
349#endif
350
ca5bb5d5
SP
351#ifdef NO_MKDTEMP
352#define mkdtemp gitmkdtemp
353extern char *gitmkdtemp(char *);
354#endif
355
0620b39b
DA
356#ifdef NO_MKSTEMPS
357#define mkstemps gitmkstemps
358extern int gitmkstemps(char *, int);
359#endif
360
731043fd
JR
361#ifdef NO_UNSETENV
362#define unsetenv gitunsetenv
363extern void gitunsetenv(const char *);
364#endif
365
4050c0df
JH
366#ifdef NO_STRCASESTR
367#define strcasestr gitstrcasestr
368extern char *gitstrcasestr(const char *haystack, const char *needle);
369#endif
370
817151e6
PE
371#ifdef NO_STRLCPY
372#define strlcpy gitstrlcpy
373extern size_t gitstrlcpy(char *, const char *, size_t);
374#endif
375
bc6b4f52
JR
376#ifdef NO_STRTOUMAX
377#define strtoumax gitstrtoumax
378extern uintmax_t gitstrtoumax(const char *, char **, int);
97000ba6
JS
379#define strtoimax gitstrtoimax
380extern intmax_t gitstrtoimax(const char *, char **, int);
bc6b4f52
JR
381#endif
382
78457bc0
JN
383#ifdef NO_STRTOK_R
384#define strtok_r gitstrtok_r
385extern char *gitstrtok_r(char *s, const char *delim, char **save_ptr);
386#endif
387
fa0c87c3
AR
388#ifdef NO_HSTRERROR
389#define hstrerror githstrerror
390extern const char *githstrerror(int herror);
391#endif
392
b21b9f1d
RS
393#ifdef NO_MEMMEM
394#define memmem gitmemmem
395void *gitmemmem(const void *haystack, size_t haystacklen,
396 const void *needle, size_t needlelen);
397#endif
398
cba22528 399#ifdef FREAD_READS_DIRECTORIES
c5445fe0
JS
400#ifdef fopen
401#undef fopen
402#endif
cba22528
BC
403#define fopen(a,b) git_fopen(a,b)
404extern FILE *git_fopen(const char*, const char*);
405#endif
406
c4582f93
MR
407#ifdef SNPRINTF_RETURNS_BOGUS
408#define snprintf git_snprintf
409extern int git_snprintf(char *str, size_t maxsize,
410 const char *format, ...);
411#define vsnprintf git_vsnprintf
412extern int git_vsnprintf(char *str, size_t maxsize,
413 const char *format, va_list ap);
414#endif
415
726c8ef5
JS
416#ifdef __GLIBC_PREREQ
417#if __GLIBC_PREREQ(2, 1)
418#define HAVE_STRCHRNUL
137c6eaa 419#define HAVE_MEMPCPY
726c8ef5
JS
420#endif
421#endif
422
423#ifndef HAVE_STRCHRNUL
659c69cf 424#define strchrnul gitstrchrnul
9e79f00f
AE
425static inline char *gitstrchrnul(const char *s, int c)
426{
427 while (*s && *s != c)
428 s++;
429 return (char *)s;
430}
659c69cf
RS
431#endif
432
137c6eaa
JN
433#ifndef HAVE_MEMPCPY
434#define mempcpy gitmempcpy
435static inline void *gitmempcpy(void *dest, const void *src, size_t n)
436{
437 return (char *)memcpy(dest, src, n) + n;
438}
439#endif
440
da523cc5
MP
441#ifdef NO_INET_PTON
442int inet_pton(int af, const char *src, void *dst);
443#endif
444
445#ifdef NO_INET_NTOP
446const char *inet_ntop(int af, const void *src, char *dst, size_t size);
447#endif
448
d1efefa4 449extern void release_pack_memory(size_t, int);
97bfeb34 450
851c34b0
JS
451typedef void (*try_to_free_t)(size_t);
452extern try_to_free_t set_try_to_free_routine(try_to_free_t);
a9a74636 453
112db553
LT
454extern char *xstrdup(const char *str);
455extern void *xmalloc(size_t size);
5bf9219d 456extern void *xmallocz(size_t size);
112db553
LT
457extern void *xmemdupz(const void *data, size_t len);
458extern char *xstrndup(const char *str, size_t len);
459extern void *xrealloc(void *ptr, size_t size);
460extern void *xcalloc(size_t nmemb, size_t size);
461extern void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
462extern ssize_t xread(int fd, void *buf, size_t len);
463extern ssize_t xwrite(int fd, const void *buf, size_t len);
464extern int xdup(int fd);
465extern FILE *xfdopen(int fd, const char *mode);
466extern int xmkstemp(char *template);
463db9b1 467extern int xmkstemp_mode(char *template, int mode);
6e180cdc
JH
468extern int odb_mkstemp(char *template, size_t limit, const char *pattern);
469extern int odb_pack_keep(char *name, size_t namesz, unsigned char *sha1);
f21a47b2 470
dc49cd76
SP
471static inline size_t xsize_t(off_t len)
472{
46be82df
TR
473 if (len > (size_t) len)
474 die("Cannot handle files this big");
dc49cd76
SP
475 return (size_t)len;
476}
477
5bb1cda5 478static inline int has_extension(const char *filename, const char *ext)
83a2b841 479{
5bb1cda5
RS
480 size_t len = strlen(filename);
481 size_t extlen = strlen(ext);
83a2b841
RS
482 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
483}
484
f1589d10
RJ
485/* in ctype.c, for kwset users */
486extern const char tolower_trans_tbl[256];
487
4050c0df 488/* Sane ctype - no locale, and works with signed chars */
c2e9364a 489#undef isascii
4050c0df
JH
490#undef isspace
491#undef isdigit
492#undef isalpha
493#undef isalnum
43ccdf56
NK
494#undef islower
495#undef isupper
4050c0df
JH
496#undef tolower
497#undef toupper
498extern unsigned char sane_ctype[256];
499#define GIT_SPACE 0x01
500#define GIT_DIGIT 0x02
501#define GIT_ALPHA 0x04
8cc32992 502#define GIT_GLOB_SPECIAL 0x08
f9b7cce6 503#define GIT_REGEX_SPECIAL 0x10
2f6c9760 504#define GIT_PATHSPEC_MAGIC 0x20
4050c0df 505#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
c2e9364a 506#define isascii(x) (((x) & ~0x7f) == 0)
4050c0df
JH
507#define isspace(x) sane_istest(x,GIT_SPACE)
508#define isdigit(x) sane_istest(x,GIT_DIGIT)
509#define isalpha(x) sane_istest(x,GIT_ALPHA)
510#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
43ccdf56
NK
511#define islower(x) sane_iscase(x, 1)
512#define isupper(x) sane_iscase(x, 0)
8cc32992 513#define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
f9b7cce6 514#define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL)
4050c0df
JH
515#define tolower(x) sane_case((unsigned char)(x), 0x20)
516#define toupper(x) sane_case((unsigned char)(x), 0)
2f6c9760 517#define is_pathspec_magic(x) sane_istest(x,GIT_PATHSPEC_MAGIC)
4050c0df
JH
518
519static inline int sane_case(int x, int high)
520{
521 if (sane_istest(x, GIT_ALPHA))
522 x = (x & ~0x20) | high;
523 return x;
524}
525
43ccdf56
NK
526static inline int sane_iscase(int x, int is_lower)
527{
528 if (!sane_istest(x, GIT_ALPHA))
529 return 0;
530
531 if (is_lower)
532 return (x & 0x20) != 0;
533 else
534 return (x & 0x20) == 0;
535}
536
6aead43d
JM
537static inline int strtoul_ui(char const *s, int base, unsigned int *result)
538{
539 unsigned long ul;
540 char *p;
541
542 errno = 0;
543 ul = strtoul(s, &p, base);
544 if (errno || *p || p == s || (unsigned int) ul != ul)
545 return -1;
546 *result = ul;
547 return 0;
548}
549
7791ecbc
JH
550static inline int strtol_i(char const *s, int base, int *result)
551{
552 long ul;
553 char *p;
554
555 errno = 0;
556 ul = strtol(s, &p, base);
557 if (errno || *p || p == s || (int) ul != ul)
558 return -1;
559 *result = ul;
560 return 0;
561}
562
43fe901b
BD
563#ifdef INTERNAL_QSORT
564void git_qsort(void *base, size_t nmemb, size_t size,
565 int(*compar)(const void *, const void *));
566#define qsort git_qsort
567#endif
568
81a24b52
AR
569#ifndef DIR_HAS_BSD_GROUP_SEMANTICS
570# define FORCE_DIR_SET_GID S_ISGID
571#else
572# define FORCE_DIR_SET_GID 0
573#endif
574
c06ff490
KB
575#ifdef NO_NSEC
576#undef USE_NSEC
577#define ST_CTIME_NSEC(st) 0
578#define ST_MTIME_NSEC(st) 0
579#else
c567383b
BG
580#ifdef USE_ST_TIMESPEC
581#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
582#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
583#else
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584#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
585#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
586#endif
c567383b 587#endif
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589#ifdef UNRELIABLE_FSTAT
590#define fstat_is_reliable() 0
591#else
592#define fstat_is_reliable() 1
593#endif
594
ab8632ae 595#ifndef va_copy
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596/*
597 * Since an obvious implementation of va_list would be to make it a
598 * pointer into the stack frame, a simple assignment will work on
599 * many systems. But let's try to be more portable.
600 */
601#ifdef __va_copy
602#define va_copy(dst, src) __va_copy(dst, src)
603#else
604#define va_copy(dst, src) ((dst) = (src))
605#endif
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606#endif
607
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608/*
609 * Preserves errno, prints a message, but gives no warning for ENOENT.
610 * Always returns the return value of unlink(2).
611 */
612int unlink_or_warn(const char *path);
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613/*
614 * Likewise for rmdir(2).
615 */
616int rmdir_or_warn(const char *path);
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617/*
618 * Calls the correct function out of {unlink,rmdir}_or_warn based on
619 * the supplied file mode.
620 */
621int remove_or_warn(unsigned int mode, const char *path);
fc71db39 622
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623/* Call access(2), but warn for any error besides ENOENT. */
624int access_or_warn(const char *path, int mode);
625
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626/* Warn on an inaccessible file that ought to be accessible */
627void warn_on_inaccessible(const char *path);
628
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629/* Get the passwd entry for the UID of the current process. */
630struct passwd *xgetpwuid_self(void);
631
4050c0df 632#endif