git-compat-util.h

   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 #if defined(__GNUC__) && (__GNUC__ < 3)
   8 #define FLEX_ARRAY 0
   9 #else
  10 #define FLEX_ARRAY /* empty */
  11 #endif
  12 #endif
  13
  14 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
  15
  16 #if !defined(__APPLE__) && !defined(__FreeBSD__)
  17 #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
  18 #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
  19 #endif
  20 #define _ALL_SOURCE 1
  21 #define _GNU_SOURCE 1
  22 #define _BSD_SOURCE 1
  23
  24 #include <unistd.h>
  25 #include <stdio.h>
  26 #include <sys/stat.h>
  27 #include <fcntl.h>
  28 #include <stddef.h>
  29 #include <stdlib.h>
  30 #include <stdarg.h>
  31 #include <string.h>
  32 #include <errno.h>
  33 #include <limits.h>
  34 #include <sys/param.h>
  35 #include <sys/types.h>
  36 #include <dirent.h>
  37 #include <sys/time.h>
  38 #include <time.h>
  39 #include <signal.h>
  40 //#include <sys/wait.h>
  41 #include <fnmatch.h>
  42 //#include <sys/poll.h>
  43 //#include <sys/socket.h>
  44 //#include <sys/select.h>
  45 #include <assert.h>
  46 #include <regex.h>
  47 //#include <netinet/in.h>
  48 //#include <netinet/tcp.h>
  49 //#include <arpa/inet.h>
  50 #ifndef NO_ETC_PASSWD
  51 #include <netdb.h>
  52 #include <pwd.h>
  53 #include <inttypes.h>
  54 #if defined(__CYGWIN__)
  55 #undef _XOPEN_SOURCE
  56 #include <grp.h>
  57 #define _XOPEN_SOURCE 600
  58 #else
  59 #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */
  60 #include <grp.h>
  61 #define _ALL_SOURCE 1
  62 #endif
  63 #endif
  64
  65 #ifndef NO_ICONV
  66 #include <iconv.h>
  67 #endif
  68
  69 /* On most systems <limits.h> would have given us this, but
  70  * not on some systems (e.g. GNU/Hurd).
  71  */
  72 #ifndef PATH_MAX
  73 #define PATH_MAX 4096
  74 #endif
  75
  76 #ifndef PRIuMAX
  77 #ifndef __MINGW32__
  78 #define PRIuMAX "llu"
  79 #else
  80 #define PRIuMAX "I64u"
  81 #endif
  82 #endif
  83
  84 #ifdef __GNUC__
  85 #define NORETURN __attribute__((__noreturn__))
  86 #else
  87 #define NORETURN
  88 #ifndef __attribute__
  89 #define __attribute__(x)
  90 #endif
  91 #endif
  92
  93 /* General helper functions */
  94 extern void usage(const char *err) NORETURN;
  95 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
  96 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
  97 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
  98
  99 extern void set_usage_routine(void (*routine)(const char *err) NORETURN);
 100 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
 101 extern void set_error_routine(void (*routine)(const char *err, va_list params));
 102 extern void set_warn_routine(void (*routine)(const char *warn, va_list params));
 103
 104 #ifdef NO_MMAP
 105
 106 #ifndef PROT_READ
 107 #define PROT_READ 1
 108 #define PROT_WRITE 2
 109 #define MAP_PRIVATE 1
 110 #define MAP_FAILED ((void*)-1)
 111 #endif
 112
 113 #define mmap git_mmap
 114 #define munmap git_munmap
 115 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
 116 extern int git_munmap(void *start, size_t length);
 117
 118 /* This value must be multiple of (pagesize * 2) */
 119 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
 120
 121 #else /* NO_MMAP */
 122
 123 #include <sys/mman.h>
 124
 125 /* This value must be multiple of (pagesize * 2) */
 126 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
 127         (sizeof(void*) >= 8 \
 128                 ?  1 * 1024 * 1024 * 1024 \
 129                 : 32 * 1024 * 1024)
 130
 131 #endif /* NO_MMAP */
 132
 133 #define DEFAULT_PACKED_GIT_LIMIT \
 134         ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
 135
 136 #ifdef NO_PREAD
 137 #define pread git_pread
 138 extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset);
 139 #endif
 140
 141 #ifdef NO_SETENV
 142 #define setenv gitsetenv
 143 extern int gitsetenv(const char *, const char *, int);
 144 #endif
 145
 146 #ifdef NO_UNSETENV
 147 #define unsetenv gitunsetenv
 148 extern void gitunsetenv(const char *);
 149 #endif
 150
 151 #ifdef NO_STRCASESTR
 152 #define strcasestr gitstrcasestr
 153 extern char *gitstrcasestr(const char *haystack, const char *needle);
 154 #endif
 155
 156 #ifdef NO_STRLCPY
 157 #define strlcpy gitstrlcpy
 158 extern size_t gitstrlcpy(char *, const char *, size_t);
 159 #endif
 160
 161 #ifdef NO_STRTOUMAX
 162 #define strtoumax gitstrtoumax
 163 extern uintmax_t gitstrtoumax(const char *, char **, int);
 164 #endif
 165
 166 extern void release_pack_memory(size_t);
 167
 168 static inline char* xstrdup(const char *str)
 169 {
 170         char *ret = strdup(str);
 171         if (!ret) {
 172                 release_pack_memory(strlen(str) + 1);
 173                 ret = strdup(str);
 174                 if (!ret)
 175                         die("Out of memory, strdup failed");
 176         }
 177         return ret;
 178 }
 179
 180 static inline void *xmalloc(size_t size)
 181 {
 182         void *ret = malloc(size);
 183         if (!ret && !size)
 184                 ret = malloc(1);
 185         if (!ret) {
 186                 release_pack_memory(size);
 187                 ret = malloc(size);
 188                 if (!ret && !size)
 189                         ret = malloc(1);
 190                 if (!ret)
 191                         die("Out of memory, malloc failed");
 192         }
 193 #ifdef XMALLOC_POISON
 194         memset(ret, 0xA5, size);
 195 #endif
 196         return ret;
 197 }
 198
 199 static inline void *xrealloc(void *ptr, size_t size)
 200 {
 201         void *ret = realloc(ptr, size);
 202         if (!ret && !size)
 203                 ret = realloc(ptr, 1);
 204         if (!ret) {
 205                 release_pack_memory(size);
 206                 ret = realloc(ptr, size);
 207                 if (!ret && !size)
 208                         ret = realloc(ptr, 1);
 209                 if (!ret)
 210                         die("Out of memory, realloc failed");
 211         }
 212         return ret;
 213 }
 214
 215 static inline void *xcalloc(size_t nmemb, size_t size)
 216 {
 217         void *ret = calloc(nmemb, size);
 218         if (!ret && (!nmemb || !size))
 219                 ret = calloc(1, 1);
 220         if (!ret) {
 221                 release_pack_memory(nmemb * size);
 222                 ret = calloc(nmemb, size);
 223                 if (!ret && (!nmemb || !size))
 224                         ret = calloc(1, 1);
 225                 if (!ret)
 226                         die("Out of memory, calloc failed");
 227         }
 228         return ret;
 229 }
 230
 231 static inline void *xmmap(void *start, size_t length,
 232         int prot, int flags, int fd, off_t offset)
 233 {
 234         void *ret = mmap(start, length, prot, flags, fd, offset);
 235         if (ret == MAP_FAILED) {
 236                 if (!length)
 237                         return NULL;
 238                 release_pack_memory(length);
 239                 ret = mmap(start, length, prot, flags, fd, offset);
 240                 if (ret == MAP_FAILED)
 241                         die("Out of memory? mmap failed: %s", strerror(errno));
 242         }
 243         return ret;
 244 }
 245
 246 static inline ssize_t xread(int fd, void *buf, size_t len)
 247 {
 248         ssize_t nr;
 249         while (1) {
 250                 nr = read(fd, buf, len);
 251                 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
 252                         continue;
 253                 return nr;
 254         }
 255 }
 256
 257 static inline ssize_t xwrite(int fd, const void *buf, size_t len)
 258 {
 259         ssize_t nr;
 260         while (1) {
 261                 nr = write(fd, buf, len);
 262                 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
 263                         continue;
 264                 return nr;
 265         }
 266 }
 267
 268 static inline size_t xsize_t(off_t len)
 269 {
 270         return (size_t)len;
 271 }
 272
 273 static inline int has_extension(const char *filename, const char *ext)
 274 {
 275         size_t len = strlen(filename);
 276         size_t extlen = strlen(ext);
 277         return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
 278 }
 279
 280 /* Sane ctype - no locale, and works with signed chars */
 281 #undef isspace
 282 #undef isdigit
 283 #undef isalpha
 284 #undef isalnum
 285 #undef tolower
 286 #undef toupper
 287 extern unsigned char sane_ctype[256];
 288 #define GIT_SPACE 0x01
 289 #define GIT_DIGIT 0x02
 290 #define GIT_ALPHA 0x04
 291 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
 292 #define isspace(x) sane_istest(x,GIT_SPACE)
 293 #define isdigit(x) sane_istest(x,GIT_DIGIT)
 294 #define isalpha(x) sane_istest(x,GIT_ALPHA)
 295 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
 296 #define tolower(x) sane_case((unsigned char)(x), 0x20)
 297 #define toupper(x) sane_case((unsigned char)(x), 0)
 298
 299 static inline int sane_case(int x, int high)
 300 {
 301         if (sane_istest(x, GIT_ALPHA))
 302                 x = (x & ~0x20) | high;
 303         return x;
 304 }
 305
 306 static inline int prefixcmp(const char *str, const char *prefix)
 307 {
 308         return strncmp(str, prefix, strlen(prefix));
 309 }
 310
 311 // MinGW
 312
 313 #ifndef S_ISLNK
 314 #define S_IFLNK    0120000 /* Symbolic link */
 315 #define S_ISLNK(x) (((x) & S_IFMT) == S_IFLNK)
 316 #endif
 317
 318 #ifndef S_ISGRP
 319 #define S_ISGRP(x) 0
 320 #define S_IRGRP 0
 321 #define S_IWGRP 0
 322 #define S_IXGRP 0
 323 #define S_ISGID 0
 324 #define S_IROTH 0
 325 #define S_IXOTH 0
 326 #endif
 327
 328 int readlink(const char *path, char *buf, size_t bufsiz);
 329 int symlink(const char *oldpath, const char *newpath);
 330 #define link symlink
 331 int fchmod(int fildes, mode_t mode);
 332 int lstat(const char *file_name, struct stat *buf);
 333
 334 /* missing: link, mkstemp, fchmod, getuid (?), gettimeofday */
 335 int socketpair(int d, int type, int protocol, int sv[2]);
 336 #define AF_UNIX 0
 337 #define SOCK_STREAM 0
 338 int syslog(int type, char *bufp, ...);
 339 #define LOG_ERR 1
 340 #define LOG_INFO 2
 341 #define LOG_DAEMON 4
 342 unsigned int alarm(unsigned int seconds);
 343 #include <winsock2.h>
 344 void mingw_execve(const char *cmd, const char **argv, const char **env);
 345 #define execve mingw_execve
 346 int fork();
 347 typedef int pid_t;
 348 #define waitpid(pid, status, options) \
 349         ((options == 0) ? _cwait((status), (pid), 0) \
 350                 : (errno = EINVAL, -1))
 351 #define WIFEXITED(x) ((unsigned)(x) < 259)      /* STILL_ACTIVE */
 352 #define WEXITSTATUS(x) ((x) & 0xff)
 353 #define WIFSIGNALED(x) ((unsigned)(x) > 259)
 354 #define WTERMSIG(x) (x)
 355 #define WNOHANG 1
 356 #define SIGKILL 0
 357 #define SIGCHLD 0
 358 #define SIGALRM 0
 359 #define ECONNABORTED 0
 360
 361 int kill(pid_t pid, int sig);
 362 unsigned int sleep (unsigned int __seconds);
 363 const char *inet_ntop(int af, const void *src,
 364                              char *dst, size_t cnt);
 365 int mkstemp (char *__template);
 366 int gettimeofday(struct timeval *tv, void *tz);
 367 int pipe(int filedes[2]);
 368
 369 struct pollfd {
 370         int fd;           /* file descriptor */
 371         short events;     /* requested events */
 372         short revents;    /* returned events */
 373 };
 374 int poll(struct pollfd *ufds, unsigned int nfds, int timeout);
 375 #define POLLIN 1
 376 #define POLLHUP 2
 377
 378 typedef int siginfo_t;
 379 struct sigaction {
 380         void (*sa_handler)(int);
 381         void (*sa_sigaction)(int, siginfo_t *, void *);
 382         sigset_t sa_mask;
 383         int sa_flags;
 384         void (*sa_restorer)(void);
 385 };
 386 #define SA_RESTART 0
 387 #define ITIMER_REAL 0
 388
 389 struct itimerval { struct timeval it_interval, it_value; };
 390
 391 static inline int git_mkdir(const char *path, int mode)
 392 {
 393         return mkdir(path);
 394 }
 395 #define mkdir git_mkdir
 396
 397 static inline int git_unlink(const char *pathname) {
 398         /* read-only files cannot be removed */
 399         chmod(pathname, 0666);
 400         return unlink(pathname);
 401 }
 402 #define unlink git_unlink
 403
 404 #define open(P, F, M...) \
 405         (__builtin_constant_p(*(P)) && !strcmp(P, "/dev/null") ? \
 406                 open("nul", F, ## M) : open(P, F, ## M))
 407
 408 #include <time.h>
 409 struct tm *gmtime_r(const time_t *timep, struct tm *result);
 410 struct tm *localtime_r(const time_t *timep, struct tm *result);
 411 #define hstrerror strerror
 412
 413 char *mingw_getcwd(char *pointer, int len);
 414 #define getcwd mingw_getcwd
 415
 416 int mingw_socket(int domain, int type, int protocol);
 417 #define socket mingw_socket
 418
 419 #define setlinebuf(x)
 420 #define fsync(x)
 421
 422 extern void quote_argv(const char **dst, const char **src);
 423 extern const char *parse_interpreter(const char *cmd);
 424
 425 #endif