contrib/bmake/util.c

   1 /*      $NetBSD: util.c,v 1.54 2013/11/26 13:44:41 joerg Exp $  */
   2
   3 /*
   4  * Missing stuff from OS's
   5  *
   6  *      $Id: util.c,v 1.33 2014/01/02 02:29:49 sjg Exp $
   7  */
   8 #if defined(__MINT__) || defined(__linux__)
   9 #include <signal.h>
  10 #endif
  11
  12 #include "make.h"
  13
  14 #ifndef MAKE_NATIVE
  15 static char rcsid[] = "$NetBSD: util.c,v 1.54 2013/11/26 13:44:41 joerg Exp $";
  16 #else
  17 #ifndef lint
  18 __RCSID("$NetBSD: util.c,v 1.54 2013/11/26 13:44:41 joerg Exp $");
  19 #endif
  20 #endif
  21
  22 #include <errno.h>
  23 #include <time.h>
  24 #include <signal.h>
  25
  26 #if !defined(HAVE_STRERROR)
  27 extern int errno, sys_nerr;
  28 extern char *sys_errlist[];
  29
  30 char *
  31 strerror(int e)
  32 {
  33     static char buf[100];
  34     if (e < 0 || e >= sys_nerr) {
  35         snprintf(buf, sizeof(buf), "Unknown error %d", e);
  36         return buf;
  37     }
  38     else
  39         return sys_errlist[e];
  40 }
  41 #endif
  42
  43 #if !defined(HAVE_GETENV) || !defined(HAVE_SETENV) || !defined(HAVE_UNSETENV)
  44 extern char **environ;
  45
  46 static char *
  47 findenv(const char *name, int *offset)
  48 {
  49         size_t i, len;
  50         char *p, *q;
  51
  52         len = strlen(name);
  53         for (i = 0; (q = environ[i]); i++) {
  54                 p = strchr(q, '=');
  55                 if (p == NULL || p - q != len)
  56                         continue;
  57                 if (strncmp(name, q, len) == 0) {
  58                         *offset = i;
  59                         return q + len + 1;
  60                 }
  61         }
  62         *offset = i;
  63         return NULL;
  64 }
  65
  66 char *
  67 getenv(const char *name)
  68 {
  69     int offset;
  70
  71     return(findenv(name, &offset));
  72 }
  73
  74 int
  75 unsetenv(const char *name)
  76 {
  77         char **p;
  78         int offset;
  79
  80         if (name == NULL || *name == '\0' || strchr(name, '=') != NULL) {
  81                 errno = EINVAL;
  82                 return -1;
  83         }
  84
  85         while (findenv(name, &offset))  { /* if set multiple times */
  86                 for (p = &environ[offset];; ++p)
  87                         if (!(*p = *(p + 1)))
  88                                 break;
  89         }
  90         return 0;
  91 }
  92
  93 int
  94 setenv(const char *name, const char *value, int rewrite)
  95 {
  96         char *c, **newenv;
  97         const char *cc;
  98         size_t l_value, size;
  99         int offset;
 100
 101         if (name == NULL || value == NULL) {
 102                 errno = EINVAL;
 103                 return -1;
 104         }
 105
 106         if (*value == '=')                      /* no `=' in value */
 107                 ++value;
 108         l_value = strlen(value);
 109
 110         /* find if already exists */
 111         if ((c = findenv(name, &offset))) {
 112                 if (!rewrite)
 113                         return 0;
 114                 if (strlen(c) >= l_value)       /* old larger; copy over */
 115                         goto copy;
 116         } else {                                        /* create new slot */
 117                 size = sizeof(char *) * (offset + 2);
 118                 if (savedEnv == environ) {              /* just increase size */
 119                         if ((newenv = realloc(savedEnv, size)) == NULL)
 120                                 return -1;
 121                         savedEnv = newenv;
 122                 } else {                                /* get new space */
 123                         /*
 124                          * We don't free here because we don't know if
 125                          * the first allocation is valid on all OS's
 126                          */
 127                         if ((savedEnv = malloc(size)) == NULL)
 128                                 return -1;
 129                         (void)memcpy(savedEnv, environ, size - sizeof(char *));
 130                 }
 131                 environ = savedEnv;
 132                 environ[offset + 1] = NULL;
 133         }
 134         for (cc = name; *cc && *cc != '='; ++cc)        /* no `=' in name */
 135                 continue;
 136         size = cc - name;
 137         /* name + `=' + value */
 138         if ((environ[offset] = malloc(size + l_value + 2)) == NULL)
 139                 return -1;
 140         c = environ[offset];
 141         (void)memcpy(c, name, size);
 142         c += size;
 143         *c++ = '=';
 144 copy:
 145         (void)memcpy(c, value, l_value + 1);
 146         return 0;
 147 }
 148
 149 #ifdef TEST
 150 int
 151 main(int argc, char *argv[])
 152 {
 153         setenv(argv[1], argv[2], 0);
 154         printf("%s\n", getenv(argv[1]));
 155         unsetenv(argv[1]);
 156         printf("%s\n", getenv(argv[1]));
 157         return 0;
 158 }
 159 #endif
 160
 161 #endif
 162
 163
 164 #if defined(__hpux__) || defined(__hpux)
 165 /* strrcpy():
 166  *      Like strcpy, going backwards and returning the new pointer
 167  */
 168 static char *
 169 strrcpy(char *ptr, char *str)
 170 {
 171     int len = strlen(str);
 172
 173     while (len)
 174         *--ptr = str[--len];
 175
 176     return (ptr);
 177 } /* end strrcpy */
 178
 179
 180 char    *sys_siglist[] = {
 181         "Signal 0",
 182         "Hangup",                       /* SIGHUP    */
 183         "Interrupt",                    /* SIGINT    */
 184         "Quit",                         /* SIGQUIT   */
 185         "Illegal instruction",          /* SIGILL    */
 186         "Trace/BPT trap",               /* SIGTRAP   */
 187         "IOT trap",                     /* SIGIOT    */
 188         "EMT trap",                     /* SIGEMT    */
 189         "Floating point exception",     /* SIGFPE    */
 190         "Killed",                       /* SIGKILL   */
 191         "Bus error",                    /* SIGBUS    */
 192         "Segmentation fault",           /* SIGSEGV   */
 193         "Bad system call",              /* SIGSYS    */
 194         "Broken pipe",                  /* SIGPIPE   */
 195         "Alarm clock",                  /* SIGALRM   */
 196         "Terminated",                   /* SIGTERM   */
 197         "User defined signal 1",        /* SIGUSR1   */
 198         "User defined signal 2",        /* SIGUSR2   */
 199         "Child exited",                 /* SIGCLD    */
 200         "Power-fail restart",           /* SIGPWR    */
 201         "Virtual timer expired",        /* SIGVTALRM */
 202         "Profiling timer expired",      /* SIGPROF   */
 203         "I/O possible",                 /* SIGIO     */
 204         "Window size changes",          /* SIGWINDOW */
 205         "Stopped (signal)",             /* SIGSTOP   */
 206         "Stopped",                      /* SIGTSTP   */
 207         "Continued",                    /* SIGCONT   */
 208         "Stopped (tty input)",          /* SIGTTIN   */
 209         "Stopped (tty output)",         /* SIGTTOU   */
 210         "Urgent I/O condition",         /* SIGURG    */
 211         "Remote lock lost (NFS)",       /* SIGLOST   */
 212         "Signal 31",                    /* reserved  */
 213         "DIL signal"                    /* SIGDIL    */
 214 };
 215 #endif /* __hpux__ || __hpux */
 216
 217 #if defined(__hpux__) || defined(__hpux)
 218 #include <sys/types.h>
 219 #include <sys/syscall.h>
 220 #include <sys/signal.h>
 221 #include <sys/stat.h>
 222 #include <dirent.h>
 223 #include <sys/time.h>
 224 #include <unistd.h>
 225
 226 int
 227 killpg(int pid, int sig)
 228 {
 229     return kill(-pid, sig);
 230 }
 231
 232 #if !defined(__hpux__) && !defined(__hpux)
 233 void
 234 srandom(long seed)
 235 {
 236     srand48(seed);
 237 }
 238
 239 long
 240 random(void)
 241 {
 242     return lrand48();
 243 }
 244 #endif
 245
 246 #if !defined(__hpux__) && !defined(__hpux)
 247 int
 248 utimes(char *file, struct timeval tvp[2])
 249 {
 250     struct utimbuf t;
 251
 252     t.actime  = tvp[0].tv_sec;
 253     t.modtime = tvp[1].tv_sec;
 254     return(utime(file, &t));
 255 }
 256 #endif
 257
 258 #if !defined(BSD) && !defined(d_fileno)
 259 # define d_fileno d_ino
 260 #endif
 261
 262 #ifndef DEV_DEV_COMPARE
 263 # define DEV_DEV_COMPARE(a, b) ((a) == (b))
 264 #endif
 265 #define ISDOT(c) ((c)[0] == '.' && (((c)[1] == '\0') || ((c)[1] == '/')))
 266 #define ISDOTDOT(c) ((c)[0] == '.' && ISDOT(&((c)[1])))
 267
 268 char *
 269 getwd(char *pathname)
 270 {
 271     DIR    *dp;
 272     struct dirent *d;
 273     extern int errno;
 274
 275     struct stat st_root, st_cur, st_next, st_dotdot;
 276     char    pathbuf[MAXPATHLEN], nextpathbuf[MAXPATHLEN * 2];
 277     char   *pathptr, *nextpathptr, *cur_name_add;
 278
 279     /* find the inode of root */
 280     if (stat("/", &st_root) == -1) {
 281         (void)sprintf(pathname,
 282                         "getwd: Cannot stat \"/\" (%s)", strerror(errno));
 283         return NULL;
 284     }
 285     pathbuf[MAXPATHLEN - 1] = '\0';
 286     pathptr = &pathbuf[MAXPATHLEN - 1];
 287     nextpathbuf[MAXPATHLEN - 1] = '\0';
 288     cur_name_add = nextpathptr = &nextpathbuf[MAXPATHLEN - 1];
 289
 290     /* find the inode of the current directory */
 291     if (lstat(".", &st_cur) == -1) {
 292         (void)sprintf(pathname,
 293                         "getwd: Cannot stat \".\" (%s)", strerror(errno));
 294         return NULL;
 295     }
 296     nextpathptr = strrcpy(nextpathptr, "../");
 297
 298     /* Descend to root */
 299     for (;;) {
 300
 301         /* look if we found root yet */
 302         if (st_cur.st_ino == st_root.st_ino &&
 303             DEV_DEV_COMPARE(st_cur.st_dev, st_root.st_dev)) {
 304             (void)strcpy(pathname, *pathptr != '/' ? "/" : pathptr);
 305             return (pathname);
 306         }
 307
 308         /* open the parent directory */
 309         if (stat(nextpathptr, &st_dotdot) == -1) {
 310             (void)sprintf(pathname,
 311                             "getwd: Cannot stat directory \"%s\" (%s)",
 312                             nextpathptr, strerror(errno));
 313             return NULL;
 314         }
 315         if ((dp = opendir(nextpathptr)) == NULL) {
 316             (void)sprintf(pathname,
 317                             "getwd: Cannot open directory \"%s\" (%s)",
 318                             nextpathptr, strerror(errno));
 319             return NULL;
 320         }
 321
 322         /* look in the parent for the entry with the same inode */
 323         if (DEV_DEV_COMPARE(st_dotdot.st_dev, st_cur.st_dev)) {
 324             /* Parent has same device. No need to stat every member */
 325             for (d = readdir(dp); d != NULL; d = readdir(dp))
 326                 if (d->d_fileno == st_cur.st_ino)
 327                     break;
 328         }
 329         else {
 330             /*
 331              * Parent has a different device. This is a mount point so we
 332              * need to stat every member
 333              */
 334             for (d = readdir(dp); d != NULL; d = readdir(dp)) {
 335                 if (ISDOT(d->d_name) || ISDOTDOT(d->d_name))
 336                     continue;
 337                 (void)strcpy(cur_name_add, d->d_name);
 338                 if (lstat(nextpathptr, &st_next) == -1) {
 339                     (void)sprintf(pathname,
 340                         "getwd: Cannot stat \"%s\" (%s)",
 341                         d->d_name, strerror(errno));
 342                     (void)closedir(dp);
 343                     return NULL;
 344                 }
 345                 /* check if we found it yet */
 346                 if (st_next.st_ino == st_cur.st_ino &&
 347                     DEV_DEV_COMPARE(st_next.st_dev, st_cur.st_dev))
 348                     break;
 349             }
 350         }
 351         if (d == NULL) {
 352             (void)sprintf(pathname,
 353                 "getwd: Cannot find \".\" in \"..\"");
 354             (void)closedir(dp);
 355             return NULL;
 356         }
 357         st_cur = st_dotdot;
 358         pathptr = strrcpy(pathptr, d->d_name);
 359         pathptr = strrcpy(pathptr, "/");
 360         nextpathptr = strrcpy(nextpathptr, "../");
 361         (void)closedir(dp);
 362         *cur_name_add = '\0';
 363     }
 364 } /* end getwd */
 365
 366 #endif /* __hpux */
 367
 368 #if !defined(HAVE_GETCWD)
 369 char *
 370 getcwd(path, sz)
 371      char *path;
 372      int sz;
 373 {
 374         return getwd(path);
 375 }
 376 #endif
 377
 378 /* force posix signals */
 379 void (*
 380 bmake_signal(int s, void (*a)(int)))(int)
 381 {
 382     struct sigaction sa, osa;
 383
 384     sa.sa_handler = a;
 385     sigemptyset(&sa.sa_mask);
 386     sa.sa_flags = SA_RESTART;
 387
 388     if (sigaction(s, &sa, &osa) == -1)
 389         return SIG_ERR;
 390     else
 391         return osa.sa_handler;
 392 }
 393
 394 #if !defined(HAVE_VSNPRINTF) || !defined(HAVE_VASPRINTF)
 395 #include <stdarg.h>
 396 #endif
 397
 398 #if !defined(HAVE_VSNPRINTF)
 399 #if !defined(__osf__)
 400 #ifdef _IOSTRG
 401 #define STRFLAG (_IOSTRG|_IOWRT)        /* no _IOWRT: avoid stdio bug */
 402 #else
 403 #if 0
 404 #define STRFLAG (_IOREAD)               /* XXX: Assume svr4 stdio */
 405 #endif
 406 #endif /* _IOSTRG */
 407 #endif /* __osf__ */
 408
 409 int
 410 vsnprintf(char *s, size_t n, const char *fmt, va_list args)
 411 {
 412 #ifdef STRFLAG
 413         FILE fakebuf;
 414
 415         fakebuf._flag = STRFLAG;
 416         /*
 417          * Some os's are char * _ptr, others are unsigned char *_ptr...
 418          * We cast to void * to make everyone happy.
 419          */
 420         fakebuf._ptr = (void *)s;
 421         fakebuf._cnt = n-1;
 422         fakebuf._file = -1;
 423         _doprnt(fmt, args, &fakebuf);
 424         fakebuf._cnt++;
 425         putc('\0', &fakebuf);
 426         if (fakebuf._cnt<0)
 427             fakebuf._cnt = 0;
 428         return (n-fakebuf._cnt-1);
 429 #else
 430 #ifndef _PATH_DEVNULL
 431 # define _PATH_DEVNULL "/dev/null"
 432 #endif
 433         /*
 434          * Rats... we don't want to clobber anything...
 435          * do a printf to /dev/null to see how much space we need.
 436          */
 437         static FILE *nullfp;
 438         int need = 0;                   /* XXX what's a useful error return? */
 439
 440         if (!nullfp)
 441                 nullfp = fopen(_PATH_DEVNULL, "w");
 442         if (nullfp) {
 443                 need = vfprintf(nullfp, fmt, args);
 444                 if (need < n)
 445                         (void)vsprintf(s, fmt, args);
 446         }
 447         return need;
 448 #endif
 449 }
 450 #endif
 451
 452 #if !defined(HAVE_SNPRINTF)
 453 int
 454 snprintf(char *s, size_t n, const char *fmt, ...)
 455 {
 456         va_list ap;
 457         int rv;
 458
 459         va_start(ap, fmt);
 460         rv = vsnprintf(s, n, fmt, ap);
 461         va_end(ap);
 462         return rv;
 463 }
 464 #endif
 465
 466 #if !defined(HAVE_STRFTIME)
 467 size_t
 468 strftime(char *buf, size_t len, const char *fmt, const struct tm *tm)
 469 {
 470         static char months[][4] = {
 471                 "Jan", "Feb", "Mar", "Apr", "May", "Jun",
 472                 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
 473         };
 474
 475         size_t s;
 476         char *b = buf;
 477
 478         while (*fmt) {
 479                 if (len == 0)
 480                         return buf - b;
 481                 if (*fmt != '%') {
 482                         *buf++ = *fmt++;
 483                         len--;
 484                         continue;
 485                 }
 486                 switch (*fmt++) {
 487                 case '%':
 488                         *buf++ = '%';
 489                         len--;
 490                         if (len == 0) return buf - b;
 491                         /*FALLTHROUGH*/
 492                 case '\0':
 493                         *buf = '%';
 494                         s = 1;
 495                         break;
 496                 case 'k':
 497                         s = snprintf(buf, len, "%d", tm->tm_hour);
 498                         break;
 499                 case 'M':
 500                         s = snprintf(buf, len, "%02d", tm->tm_min);
 501                         break;
 502                 case 'S':
 503                         s = snprintf(buf, len, "%02d", tm->tm_sec);
 504                         break;
 505                 case 'b':
 506                         if (tm->tm_mon >= 12)
 507                                 return buf - b;
 508                         s = snprintf(buf, len, "%s", months[tm->tm_mon]);
 509                         break;
 510                 case 'd':
 511                         s = snprintf(buf, len, "%02d", tm->tm_mday);
 512                         break;
 513                 case 'Y':
 514                         s = snprintf(buf, len, "%d", 1900 + tm->tm_year);
 515                         break;
 516                 default:
 517                         s = snprintf(buf, len, "Unsupported format %c",
 518                             fmt[-1]);
 519                         break;
 520                 }
 521                 buf += s;
 522                 len -= s;
 523         }
 524 }
 525 #endif
 526
 527 #if !defined(HAVE_KILLPG)
 528 #if !defined(__hpux__) && !defined(__hpux)
 529 int
 530 killpg(int pid, int sig)
 531 {
 532     return kill(-pid, sig);
 533 }
 534 #endif
 535 #endif
 536
 537 #if !defined(HAVE_WARNX)
 538 static void
 539 vwarnx(const char *fmt, va_list args)
 540 {
 541         fprintf(stderr, "%s: ", progname);
 542         if ((fmt)) {
 543                 vfprintf(stderr, fmt, args);
 544                 fprintf(stderr, ": ");
 545         }
 546 }
 547 #endif
 548
 549 #if !defined(HAVE_WARN)
 550 static void
 551 vwarn(const char *fmt, va_list args)
 552 {
 553         vwarnx(fmt, args);
 554         fprintf(stderr, "%s\n", strerror(errno));
 555 }
 556 #endif
 557
 558 #if !defined(HAVE_ERR)
 559 static void
 560 verr(int eval, const char *fmt, va_list args)
 561 {
 562         vwarn(fmt, args);
 563         exit(eval);
 564 }
 565 #endif
 566
 567 #if !defined(HAVE_ERRX)
 568 static void
 569 verrx(int eval, const char *fmt, va_list args)
 570 {
 571         vwarnx(fmt, args);
 572         exit(eval);
 573 }
 574 #endif
 575
 576 #if !defined(HAVE_ERR)
 577 void
 578 err(int eval, const char *fmt, ...)
 579 {
 580         va_list ap;
 581
 582         va_start(ap, fmt);
 583         verr(eval, fmt, ap);
 584         va_end(ap);
 585 }
 586 #endif
 587
 588 #if !defined(HAVE_ERRX)
 589 void
 590 errx(int eval, const char *fmt, ...)
 591 {
 592         va_list ap;
 593
 594         va_start(ap, fmt);
 595         verrx(eval, fmt, ap);
 596         va_end(ap);
 597 }
 598 #endif
 599
 600 #if !defined(HAVE_WARN)
 601 void
 602 warn(const char *fmt, ...)
 603 {
 604         va_list ap;
 605
 606         va_start(ap, fmt);
 607         vwarn(fmt, ap);
 608         va_end(ap);
 609 }
 610 #endif
 611
 612 #if !defined(HAVE_WARNX)
 613 void
 614 warnx(const char *fmt, ...)
 615 {
 616         va_list ap;
 617
 618         va_start(ap, fmt);
 619         vwarnx(fmt, ap);
 620         va_end(ap);
 621 }
 622 #endif