examples/loadables/finfo.c

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