git-compat-util.h

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