examples/loadables/finfo.c

   1 /*
   2  * finfo - print file info
   3  *
   4  * Chet Ramey
   5  * chet@po.cwru.edu
   6  */
   7
   8 #ifdef HAVE_CONFIG_H
   9 #  include <config.h>
  10 #endif
  11
  12 #include <sys/types.h>
  13 #include "posixstat.h"
  14 #include <stdio.h>
  15 #include <pwd.h>
  16 #include <grp.h>
  17 #include <errno.h>
  18 #include "posixtime.h"
  19
  20 #include "bashansi.h"
  21 #include "shell.h"
  22 #include "builtins.h"
  23 #include "common.h"
  24
  25 #ifndef errno
  26 extern int      errno;
  27 #endif
  28
  29 extern char     **make_builtin_argv ();
  30
  31 static int      printst();
  32 static int      printsome();
  33 static int      printfinfo();
  34 static int      finfo_main();
  35
  36 extern int      sh_optind;
  37 extern char     *sh_optarg;
  38 extern char     *this_command_name;
  39
  40 static char     *prog;
  41 static int      pmask;
  42
  43 #define OPT_UID         0x00001
  44 #define OPT_GID         0x00002
  45 #define OPT_DEV         0x00004
  46 #define OPT_INO         0x00008
  47 #define OPT_PERM        0x00010
  48 #define OPT_LNKNAM      0x00020
  49 #define OPT_FID         0x00040
  50 #define OPT_NLINK       0x00080
  51 #define OPT_RDEV        0x00100
  52 #define OPT_SIZE        0x00200
  53 #define OPT_ATIME       0x00400
  54 #define OPT_MTIME       0x00800
  55 #define OPT_CTIME       0x01000
  56 #define OPT_BLKSIZE     0x02000
  57 #define OPT_BLKS        0x04000
  58 #define OPT_FTYPE       0x08000
  59 #define OPT_PMASK       0x10000
  60 #define OPT_OPERM       0x20000
  61
  62 #define OPT_ASCII       0x1000000
  63
  64 #define OPTIONS         "acdgiflmnopsuACGMP:U"
  65
  66 static int
  67 octal(s)
  68 char    *s;
  69 {
  70         int     r;
  71
  72         r = *s - '0';
  73         while (*++s >= '0' && *s <= '7')
  74                 r = (r * 8) + (*s - '0');
  75         return r;
  76 }
  77
  78 static int
  79 finfo_main(argc, argv)
  80 int     argc;
  81 char    **argv;
  82 {
  83         register int    i;
  84         int     mode, flags, opt;
  85
  86         sh_optind = 0;  /* XXX */
  87         prog = base_pathname(argv[0]);
  88         if (argc == 1) {
  89                 builtin_usage();
  90                 return(1);
  91         }
  92         flags = 0;
  93         while ((opt = sh_getopt(argc, argv, OPTIONS)) != EOF) {
  94                 switch(opt) {
  95                 case 'a': flags |= OPT_ATIME; break;
  96                 case 'A': flags |= OPT_ATIME|OPT_ASCII; break;
  97                 case 'c': flags |= OPT_CTIME; break;
  98                 case 'C': flags |= OPT_CTIME|OPT_ASCII; break;
  99                 case 'd': flags |= OPT_DEV; break;
 100                 case 'i': flags |= OPT_INO; break;
 101                 case 'f': flags |= OPT_FID; break;
 102                 case 'g': flags |= OPT_GID; break;
 103                 case 'G': flags |= OPT_GID|OPT_ASCII; break;
 104                 case 'l': flags |= OPT_LNKNAM; break;
 105                 case 'm': flags |= OPT_MTIME; break;
 106                 case 'M': flags |= OPT_MTIME|OPT_ASCII; break;
 107                 case 'n': flags |= OPT_NLINK; break;
 108                 case 'o': flags |= OPT_OPERM; break;
 109                 case 'p': flags |= OPT_PERM; break;
 110                 case 'P': flags |= OPT_PMASK; pmask = octal(sh_optarg); break;
 111                 case 's': flags |= OPT_SIZE; break;
 112                 case 'u': flags |= OPT_UID; break;
 113                 case 'U': flags |= OPT_UID|OPT_ASCII; break;
 114                 default: builtin_usage (); return(1);
 115                 }
 116         }
 117
 118         argc -= sh_optind;
 119         argv += sh_optind;
 120
 121         if (argc == 0) {
 122                 builtin_usage();
 123                 return(1);
 124         }
 125
 126         for (i = 0; i < argc; i++)
 127                 opt = flags ? printsome (argv[i], flags) : printfinfo(argv[i]);
 128
 129         return(opt);
 130 }
 131
 132 static struct stat *
 133 getstat(f)
 134 char    *f;
 135 {
 136         static struct stat st;
 137         int     fd, r;
 138         intmax_t lfd;
 139
 140         if (strncmp(f, "/dev/fd/", 8) == 0) {
 141                 if ((legal_number(f + 8, &lfd) == 0) || (int)lfd != lfd) {
 142                         builtin_error("%s: invalid fd", f + 8);
 143                         return ((struct stat *)0);
 144                 }
 145                 fd = lfd;
 146                 r = fstat(fd, &st);
 147         } else
 148 #ifdef HAVE_LSTAT
 149                 r = lstat(f, &st);
 150 #else
 151                 r = stat(f, &st);
 152 #endif
 153         if (r < 0) {
 154                 builtin_error("%s: cannot stat: %s", f, strerror(errno));
 155                 return ((struct stat *)0);
 156         }
 157         return (&st);
 158 }
 159
 160 static int
 161 printfinfo(f)
 162 char    *f;
 163 {
 164         struct stat *st;
 165
 166         st = getstat(f);
 167         return (st ? printst(st) : 1);
 168 }
 169
 170 static int
 171 getperm(m)
 172 int     m;
 173 {
 174         return (m & (S_IRWXU|S_IRWXG|S_IRWXO|S_ISUID|S_ISGID));
 175 }
 176
 177 static int
 178 perms(m)
 179 int     m;
 180 {
 181         char ubits[4], gbits[4], obits[4];      /* u=rwx,g=rwx,o=rwx */
 182         int i;
 183
 184         i = 0;
 185         if (m & S_IRUSR)
 186                 ubits[i++] = 'r';
 187         if (m & S_IWUSR)
 188                 ubits[i++] = 'w';
 189         if (m & S_IXUSR)
 190                 ubits[i++] = 'x';
 191         ubits[i] = '\0';
 192
 193         i = 0;
 194         if (m & S_IRGRP)
 195                 gbits[i++] = 'r';
 196         if (m & S_IWGRP)
 197                 gbits[i++] = 'w';
 198         if (m & S_IXGRP)
 199                 gbits[i++] = 'x';
 200         gbits[i] = '\0';
 201
 202         i = 0;
 203         if (m & S_IROTH)
 204                 obits[i++] = 'r';
 205         if (m & S_IWOTH)
 206                 obits[i++] = 'w';
 207         if (m & S_IXOTH)
 208                 obits[i++] = 'x';
 209         obits[i] = '\0';
 210
 211         if (m & S_ISUID)
 212                 ubits[2] = (m & S_IXUSR) ? 's' : 'S';
 213         if (m & S_ISGID)
 214                 gbits[2] = (m & S_IXGRP) ? 's' : 'S';
 215         if (m & S_ISVTX)
 216                 obits[2] = (m & S_IXOTH) ? 't' : 'T';
 217
 218         printf ("u=%s,g=%s,o=%s", ubits, gbits, obits);
 219 }
 220
 221 static int
 222 printmode(mode)
 223 int     mode;
 224 {
 225         if (S_ISBLK(mode))
 226                 printf("S_IFBLK ");
 227         if (S_ISCHR(mode))
 228                 printf("S_IFCHR ");
 229         if (S_ISDIR(mode))
 230                 printf("S_IFDIR ");
 231         if (S_ISREG(mode))
 232                 printf("S_IFREG ");
 233         if (S_ISFIFO(mode))
 234                 printf("S_IFIFO ");
 235         if (S_ISLNK(mode))
 236                 printf("S_IFLNK ");
 237         if (S_ISSOCK(mode))
 238                 printf("S_IFSOCK ");
 239 #ifdef S_ISWHT
 240         if (S_ISWHT(mode))
 241                 printf("S_ISWHT ");
 242 #endif
 243         perms(getperm(mode));
 244         printf("\n");
 245 }
 246
 247 static int
 248 printst(st)
 249 struct stat *st;
 250 {
 251         struct passwd   *pw;
 252         struct group    *gr;
 253         char    *owner;
 254         int     ma, mi, d;
 255
 256         ma = major (st->st_rdev);
 257         mi = minor (st->st_rdev);
 258 #if defined (makedev)
 259         d = makedev (ma, mi);
 260 #else
 261         d = st->st_rdev & 0xFF;
 262 #endif
 263         printf("Device (major/minor): %d (%d/%d)\n", d, ma, mi);
 264
 265         printf("Inode: %d\n", (int) st->st_ino);
 266         printf("Mode: (%o) ", (int) st->st_mode);
 267         printmode((int) st->st_mode);
 268         printf("Link count: %d\n", (int) st->st_nlink);
 269         pw = getpwuid(st->st_uid);
 270         owner = pw ? pw->pw_name : "unknown";
 271         printf("Uid of owner: %d (%s)\n", (int) st->st_uid, owner);
 272         gr = getgrgid(st->st_gid);
 273         owner = gr ? gr->gr_name : "unknown";
 274         printf("Gid of owner: %d (%s)\n", (int) st->st_gid, owner);
 275         printf("Device type: %d\n", (int) st->st_rdev);
 276         printf("File size: %ld\n", (long) st->st_size);
 277         printf("File last access time: %s", ctime (&st->st_atime));
 278         printf("File last modify time: %s", ctime (&st->st_mtime));
 279         printf("File last status change time: %s", ctime (&st->st_ctime));
 280         fflush(stdout);
 281         return(0);
 282 }
 283
 284 static int
 285 printsome(f, flags)
 286 char    *f;
 287 int     flags;
 288 {
 289         struct stat *st;
 290         struct passwd *pw;
 291         struct group *gr;
 292         int     p;
 293         char    *b;
 294
 295         st = getstat(f);
 296         if (st == NULL)
 297                 return (1);
 298
 299         /* Print requested info */
 300         if (flags & OPT_ATIME) {
 301                 if (flags & OPT_ASCII)
 302                         printf("%s", ctime(&st->st_atime));
 303                 else
 304                         printf("%ld\n", st->st_atime);
 305         } else if (flags & OPT_MTIME) {
 306                 if (flags & OPT_ASCII)
 307                         printf("%s", ctime(&st->st_mtime));
 308                 else
 309                         printf("%ld\n", st->st_mtime);
 310         } else if (flags & OPT_CTIME) {
 311                 if (flags & OPT_ASCII)
 312                         printf("%s", ctime(&st->st_ctime));
 313                 else
 314                         printf("%ld\n", st->st_ctime);
 315         } else if (flags & OPT_DEV)
 316                 printf("%d\n", st->st_dev);
 317         else if (flags & OPT_INO)
 318                 printf("%d\n", st->st_ino);
 319         else if (flags & OPT_FID)
 320                 printf("%d:%ld\n", st->st_dev, st->st_ino);
 321         else if (flags & OPT_NLINK)
 322                 printf("%d\n", st->st_nlink);
 323         else if (flags & OPT_LNKNAM) {
 324 #ifdef S_ISLNK
 325                 b = xmalloc(4096);
 326                 p = readlink(f, b, 4096);
 327                 if (p >= 0 && p < 4096)
 328                         b[p] = '\0';
 329                 else {
 330                         p = errno;
 331                         strcpy(b, prog);
 332                         strcat(b, ": ");
 333                         strcat(b, strerror(p));
 334                 }
 335                 printf("%s\n", b);
 336                 free(b);
 337 #else
 338                 printf("%s\n", f);
 339 #endif
 340         } else if (flags & OPT_PERM) {
 341                 perms(st->st_mode);
 342                 printf("\n");
 343         } else if (flags & OPT_OPERM)
 344                 printf("%o\n", getperm(st->st_mode));
 345         else if (flags & OPT_PMASK)
 346                 printf("%o\n", getperm(st->st_mode) & pmask);
 347         else if (flags & OPT_UID) {
 348                 pw = getpwuid(st->st_uid);
 349                 if (flags & OPT_ASCII)
 350                         printf("%s\n", pw ? pw->pw_name : "unknown");
 351                 else
 352                         printf("%d\n", st->st_uid);
 353         } else if (flags & OPT_GID) {
 354                 gr = getgrgid(st->st_gid);
 355                 if (flags & OPT_ASCII)
 356                         printf("%s\n", gr ? gr->gr_name : "unknown");
 357                 else
 358                         printf("%d\n", st->st_gid);
 359         } else if (flags & OPT_SIZE)
 360                 printf("%ld\n", st->st_size);
 361
 362         return (0);
 363 }
 364
 365 #ifndef NOBUILTIN
 366 int
 367 finfo_builtin(list)
 368      WORD_LIST *list;
 369 {
 370   int c, r;
 371   char **v;
 372   WORD_LIST *l;
 373
 374   v = make_builtin_argv (list, &c);
 375   r = finfo_main (c, v);
 376   free (v);
 377
 378   return r;
 379 }
 380
 381 static char *finfo_doc[] = {
 382   "Display information about file attributes.",
 383   "",
 384   "Display information about each FILE.  Only single operators should",
 385   "be supplied.  If no options are supplied, a summary of the info",
 386   "available about each FILE is printed.  If FILE is of the form",
 387   "/dev/fd/XX, file descriptor XX is described.  Operators, if supplied,",
 388   "have the following meanings:",
 389   "",
 390   "     -a      last file access time",
 391   "     -A      last file access time in ctime format",
 392   "     -c      last file status change time",
 393   "     -C      last file status change time in ctime format",
 394   "     -m      last file modification time",
 395   "     -M      last file modification time in ctime format",
 396   "     -d      device",
 397   "     -i      inode",
 398   "     -f      composite file identifier (device:inode)",
 399   "     -g      gid of owner",
 400   "     -G      group name of owner",
 401   "     -l      name of file pointed to by symlink",
 402   "     -n      link count",
 403   "     -o      permissions in octal",
 404   "     -p      permissions in ascii",
 405   "     -P mask permissions ANDed with MASK (like with umask)",
 406   "     -s      file size in bytes",
 407   "     -u      uid of owner",
 408   "     -U      user name of owner",
 409   (char *)0
 410 };
 411
 412 struct builtin finfo_struct = {
 413         "finfo",
 414         finfo_builtin,
 415         BUILTIN_ENABLED,
 416         finfo_doc,
 417         "finfo [-acdgiflmnopsuACGMPU] file [file...]",
 418         0
 419 };
 420 #endif
 421
 422 #ifdef NOBUILTIN
 423 #if defined (PREFER_STDARG)
 424 #  include <stdarg.h>
 425 #else
 426 #  if defined (PREFER_VARARGS)
 427 #    include <varargs.h>
 428 #  endif
 429 #endif
 430
 431 char *this_command_name;
 432
 433 main(argc, argv)
 434 int     argc;
 435 char    **argv;
 436 {
 437         this_command_name = argv[0];
 438         exit(finfo_main(argc, argv));
 439 }
 440
 441 void
 442 builtin_usage()
 443 {
 444         fprintf(stderr, "%s: usage: %s [-%s] [file ...]\n", prog, OPTIONS);
 445 }
 446
 447 #ifndef HAVE_STRERROR
 448 char *
 449 strerror(e)
 450 int     e;
 451 {
 452         static char     ebuf[40];
 453         extern int      sys_nerr;
 454         extern char     *sys_errlist[];
 455
 456         if (e < 0 || e > sys_nerr) {
 457                 sprintf(ebuf,"Unknown error code %d", e);
 458                 return (&ebuf[0]);
 459         }
 460         return (sys_errlist[e]);
 461 }
 462 #endif
 463
 464 char *
 465 xmalloc(s)
 466 size_t  s;
 467 {
 468         char    *ret;
 469         extern char *malloc();
 470
 471         ret = malloc(s);
 472         if (ret)
 473                 return (ret);
 474         fprintf(stderr, "%s: cannot malloc %d bytes\n", prog, s);
 475         exit(1);
 476 }
 477
 478 char *
 479 base_pathname(p)
 480 char    *p;
 481 {
 482         char    *t;
 483
 484         if (t = strrchr(p, '/'))
 485                 return(++t);
 486         return(p);
 487 }
 488
 489 int
 490 legal_number (string, result)
 491      char *string;
 492      long *result;
 493 {
 494   int sign;
 495   long value;
 496
 497   sign = 1;
 498   value = 0;
 499
 500   if (result)
 501     *result = 0;
 502
 503   /* Skip leading whitespace characters. */
 504   while (whitespace (*string))
 505     string++;
 506
 507   if (!*string)
 508     return (0);
 509
 510   /* We allow leading `-' or `+'. */
 511   if (*string == '-' || *string == '+')
 512     {
 513       if (!digit (string[1]))
 514         return (0);
 515
 516       if (*string == '-')
 517         sign = -1;
 518
 519       string++;
 520     }
 521
 522   while (digit (*string))
 523     {
 524       if (result)
 525         value = (value * 10) + digit_value (*string);
 526       string++;
 527     }
 528
 529   /* Skip trailing whitespace, if any. */
 530   while (whitespace (*string))
 531     string++;
 532
 533   /* Error if not at end of string. */
 534   if (*string)
 535     return (0);
 536
 537   if (result)
 538     *result = value * sign;
 539
 540   return (1);
 541 }
 542
 543 int sh_optind;
 544 char *sh_optarg;
 545 int sh_opterr;
 546
 547 extern int optind;
 548 extern char *optarg;
 549
 550 int
 551 sh_getopt(c, v, o)
 552 int     c;
 553 char    **v, *o;
 554 {
 555         int     r;
 556
 557         r = getopt(c, v, o);
 558         sh_optind = optind;
 559         sh_optarg = optarg;
 560         return r;
 561 }
 562
 563 #if defined (USE_VARARGS)
 564 void
 565 #if defined (PREFER_STDARG)
 566 builtin_error (const char *format, ...)
 567 #else
 568 builtin_error (format, va_alist)
 569      const char *format;
 570      va_dcl
 571 #endif
 572 {
 573   va_list args;
 574
 575   if (this_command_name && *this_command_name)
 576     fprintf (stderr, "%s: ", this_command_name);
 577
 578 #if defined (PREFER_STDARG)
 579   va_start (args, format);
 580 #else
 581   va_start (args);
 582 #endif
 583
 584   vfprintf (stderr, format, args);
 585   va_end (args);
 586   fprintf (stderr, "\n");
 587 }
 588 #else
 589 void
 590 builtin_error (format, arg1, arg2, arg3, arg4, arg5)
 591      char *format, *arg1, *arg2, *arg3, *arg4, *arg5;
 592 {
 593   if (this_command_name && *this_command_name)
 594     fprintf (stderr, "%s: ", this_command_name);
 595
 596   fprintf (stderr, format, arg1, arg2, arg3, arg4, arg5);
 597   fprintf (stderr, "\n");
 598   fflush (stderr);
 599 }
 600 #endif /* !USE_VARARGS */
 601
 602 #endif