Andrew's git - gitweb.git/blob

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