usr.sbin/ckdist/ckdist.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 1997 Robert Nordier
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in
  14  *    the documentation and/or other materials provided with the
  15  *    distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS
  18  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY
  21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  23  * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  24  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  25  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  26  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
  27  * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  *
  29  * $FreeBSD: head/usr.sbin/ckdist/ckdist.c 326276 2017-11-27 15:37:16Z pfg $
  30  */
  31
  32 #include <sys/types.h>
  33 #include <sys/stat.h>
  34
  35 #include <err.h>
  36 #include <errno.h>
  37 #include <fcntl.h>
  38 #include <fts.h>
  39 #include <md5.h>
  40 #include <stdio.h>
  41 #include <stdint.h>
  42 #include <stdlib.h>
  43 #include <string.h>
  44 #include <unistd.h>
  45
  46 extern int crc(int fd, uint32_t *cval, off_t *clen);
  47
  48 #define DISTMD5     1           /* MD5 format */
  49 #define DISTINF     2           /* .inf format */
  50 #define DISTTYPES   2           /* types supported */
  51
  52 #define E_UNKNOWN   1           /* Unknown format */
  53 #define E_BADMD5    2           /* Invalid MD5 format */
  54 #define E_BADINF    3           /* Invalid .inf format */
  55 #define E_NAME      4           /* Can't derive component name */
  56 #define E_LENGTH    5           /* Length mismatch */
  57 #define E_CHKSUM    6           /* Checksum mismatch */
  58 #define E_ERRNO     7           /* sys_errlist[errno] */
  59
  60 #define isfatal(err)   ((err) && (err) <= E_NAME)
  61
  62 #define NAMESIZE  256           /* filename buffer size */
  63 #define MDSUMLEN   32           /* length of MD5 message digest */
  64
  65 #define isstdin(path)  ((path)[0] == '-' && !(path)[1])
  66
  67 static const char *opt_dir;     /* where to look for components */
  68 static const char *opt_name;    /* name for accessing components */
  69 static int opt_all;             /* report on all components */
  70 static int opt_ignore;          /* ignore missing components */
  71 static int opt_recurse;         /* search directories recursively */
  72 static int opt_silent;          /* silent about inaccessible files */
  73 static int opt_type;            /* dist type: md5 or inf */
  74 static int opt_exist;           /* just verify existence */
  75
  76 static int ckdist(const char *path, int type);
  77 static int chkmd5(FILE * fp, const char *path);
  78 static int chkinf(FILE * fp, const char *path);
  79 static int report(const char *path, const char *name, int error);
  80 static const char *distname(const char *path, const char *name,
  81                             const char *ext);
  82 static const char *stripath(const char *path);
  83 static int distfile(const char *path);
  84 static int disttype(const char *name);
  85 static int fail(const char *path, const char *msg);
  86 static void usage(void);
  87
  88 int
  89 main(int argc, char *argv[])
  90 {
  91     static char *arg[2];
  92     struct stat sb;
  93     FTS *ftsp;
  94     FTSENT *f;
  95     int rval, c, type;
  96
  97     while ((c = getopt(argc, argv, "ad:in:rst:x")) != -1)
  98         switch (c) {
  99         case 'a':
 100             opt_all = 1;
 101             break;
 102         case 'd':
 103             opt_dir = optarg;
 104             break;
 105         case 'i':
 106             opt_ignore = 1;
 107             break;
 108         case 'n':
 109             opt_name = optarg;
 110             break;
 111         case 'r':
 112             opt_recurse = 1;
 113             break;
 114         case 's':
 115             opt_silent = 1;
 116             break;
 117         case 't':
 118             if ((opt_type = disttype(optarg)) == 0) {
 119                 warnx("illegal argument to -t option");
 120                 usage();
 121             }
 122             break;
 123         case 'x':
 124             opt_exist = 1;
 125             break;
 126         default:
 127             usage();
 128         }
 129     argc -= optind;
 130     argv += optind;
 131     if (argc < 1)
 132         usage();
 133     if (opt_dir) {
 134         if (stat(opt_dir, &sb))
 135             err(2, "%s", opt_dir);
 136         if (!S_ISDIR(sb.st_mode))
 137             errx(2, "%s: not a directory", opt_dir);
 138     }
 139     rval = 0;
 140     do {
 141         if (isstdin(*argv))
 142             rval |= ckdist(*argv, opt_type);
 143         else if (stat(*argv, &sb))
 144             rval |= fail(*argv, NULL);
 145         else if (S_ISREG(sb.st_mode))
 146             rval |= ckdist(*argv, opt_type);
 147         else {
 148             arg[0] = *argv;
 149             if ((ftsp = fts_open(arg, FTS_LOGICAL, NULL)) == NULL)
 150                 err(2, "fts_open");
 151             while ((f = fts_read(ftsp)) != NULL)
 152                 switch (f->fts_info) {
 153                 case FTS_DC:
 154                     rval = fail(f->fts_path, "Directory causes a cycle");
 155                     break;
 156                 case FTS_DNR:
 157                 case FTS_ERR:
 158                 case FTS_NS:
 159                     rval = fail(f->fts_path, sys_errlist[f->fts_errno]);
 160                     break;
 161                 case FTS_D:
 162                     if (!opt_recurse && f->fts_level > FTS_ROOTLEVEL &&
 163                         fts_set(ftsp, f, FTS_SKIP))
 164                         err(2, "fts_set");
 165                     break;
 166                 case FTS_F:
 167                     if ((type = distfile(f->fts_name)) != 0 &&
 168                         (!opt_type || type == opt_type))
 169                         rval |= ckdist(f->fts_path, type);
 170                     break;
 171                 default: ;
 172                 }
 173             if (errno)
 174                 err(2, "fts_read");
 175             if (fts_close(ftsp))
 176                 err(2, "fts_close");
 177         }
 178     } while (*++argv);
 179     return rval;
 180 }
 181
 182 static int
 183 ckdist(const char *path, int type)
 184 {
 185     FILE *fp;
 186     int rval, c;
 187
 188     if (isstdin(path)) {
 189         path = "(stdin)";
 190         fp = stdin;
 191     } else if ((fp = fopen(path, "r")) == NULL)
 192         return fail(path, NULL);
 193     if (!type) {
 194         if (fp != stdin)
 195             type = distfile(path);
 196         if (!type)
 197             if ((c = fgetc(fp)) != EOF) {
 198                 type = c == 'M' ? DISTMD5 : c == 'P' ? DISTINF : 0;
 199                 ungetc(c, fp);
 200             }
 201     }
 202     switch (type) {
 203     case DISTMD5:
 204         rval = chkmd5(fp, path);
 205         break;
 206     case DISTINF:
 207         rval = chkinf(fp, path);
 208         break;
 209     default:
 210         rval = report(path, NULL, E_UNKNOWN);
 211     }
 212     if (ferror(fp))
 213         warn("%s", path);
 214     if (fp != stdin && fclose(fp))
 215         err(2, "%s", path);
 216     return rval;
 217 }
 218
 219 static int
 220 chkmd5(FILE * fp, const char *path)
 221 {
 222     char buf[298];              /* "MD5 (NAMESIZE = MDSUMLEN" */
 223     char name[NAMESIZE + 1];
 224     char sum[MDSUMLEN + 1], chk[MDSUMLEN + 1];
 225     const char *dname;
 226     char *s;
 227     int rval, error, c, fd;
 228     char ch;
 229
 230     rval = 0;
 231     while (fgets(buf, sizeof(buf), fp)) {
 232         dname = NULL;
 233         error = 0;
 234         if (((c = sscanf(buf, "MD5 (%256s = %32s%c", name, sum,
 235                          &ch)) != 3 && (!feof(fp) || c != 2)) ||
 236             (c == 3 && ch != '\n') ||
 237             (s = strrchr(name, ')')) == NULL ||
 238             strlen(sum) != MDSUMLEN)
 239             error = E_BADMD5;
 240         else {
 241             *s = 0;
 242             if ((dname = distname(path, name, NULL)) == NULL)
 243                 error = E_NAME;
 244             else if (opt_exist) {
 245                 if ((fd = open(dname, O_RDONLY)) == -1)
 246                     error = E_ERRNO;
 247                 else if (close(fd))
 248                     err(2, "%s", dname);
 249             } else if (!MD5File(dname, chk))
 250                 error = E_ERRNO;
 251             else if (strcmp(chk, sum))
 252                 error = E_CHKSUM;
 253         }
 254         if (opt_ignore && error == E_ERRNO && errno == ENOENT)
 255             continue;
 256         if (error || opt_all)
 257             rval |= report(path, dname, error);
 258         if (isfatal(error))
 259             break;
 260     }
 261     return rval;
 262 }
 263
 264 static int
 265 chkinf(FILE * fp, const char *path)
 266 {
 267     char buf[30];               /* "cksum.2 = 10 6" */
 268     char ext[3];
 269     struct stat sb;
 270     const char *dname;
 271     off_t len;
 272     u_long sum;
 273     intmax_t sumlen;
 274     uint32_t chk;
 275     int rval, error, c, pieces, cnt, fd;
 276     char ch;
 277
 278     rval = 0;
 279     for (cnt = -1; fgets(buf, sizeof(buf), fp); cnt++) {
 280         fd = -1;
 281         dname = NULL;
 282         error = 0;
 283         if (cnt == -1) {
 284             if ((c = sscanf(buf, "Pieces =  %d%c", &pieces, &ch)) != 2 ||
 285                 ch != '\n' || pieces < 1)
 286                 error = E_BADINF;
 287         } else if (((c = sscanf(buf, "cksum.%2s = %lu %jd%c", ext, &sum,
 288                                 &sumlen, &ch)) != 4 &&
 289                     (!feof(fp) || c != 3)) || (c == 4 && ch != '\n') ||
 290                    ext[0] != 'a' + cnt / 26 || ext[1] != 'a' + cnt % 26)
 291             error = E_BADINF;
 292         else if ((dname = distname(fp == stdin ? NULL : path, NULL,
 293                                     ext)) == NULL)
 294             error = E_NAME;
 295         else if ((fd = open(dname, O_RDONLY)) == -1)
 296             error = E_ERRNO;
 297         else if (fstat(fd, &sb))
 298             error = E_ERRNO;
 299         else if (sb.st_size != (off_t)sumlen)
 300             error = E_LENGTH;
 301         else if (!opt_exist) {
 302             if (crc(fd, &chk, &len))
 303                 error = E_ERRNO;
 304             else if (chk != sum)
 305                 error = E_CHKSUM;
 306         }
 307         if (fd != -1 && close(fd))
 308             err(2, "%s", dname);
 309         if (opt_ignore && error == E_ERRNO && errno == ENOENT)
 310             continue;
 311         if (error || (opt_all && cnt >= 0))
 312             rval |= report(path, dname, error);
 313         if (isfatal(error))
 314             break;
 315     }
 316     return rval;
 317 }
 318
 319 static int
 320 report(const char *path, const char *name, int error)
 321 {
 322     if (name)
 323         name = stripath(name);
 324     switch (error) {
 325     case E_UNKNOWN:
 326         printf("%s: Unknown format\n", path);
 327         break;
 328     case E_BADMD5:
 329         printf("%s: Invalid MD5 format\n", path);
 330         break;
 331     case E_BADINF:
 332         printf("%s: Invalid .inf format\n", path);
 333         break;
 334     case E_NAME:
 335         printf("%s: Can't derive component name\n", path);
 336         break;
 337     case E_LENGTH:
 338         printf("%s: %s: Size mismatch\n", path, name);
 339         break;
 340     case E_CHKSUM:
 341         printf("%s: %s: Checksum mismatch\n", path, name);
 342         break;
 343     case E_ERRNO:
 344         printf("%s: %s: %s\n", path, name, sys_errlist[errno]);
 345         break;
 346     default:
 347         printf("%s: %s: OK\n", path, name);
 348     }
 349     return error != 0;
 350 }
 351
 352 static const char *
 353 distname(const char *path, const char *name, const char *ext)
 354 {
 355     static char buf[NAMESIZE];
 356     size_t plen, nlen;
 357     char *s;
 358
 359     if (opt_name)
 360         name = opt_name;
 361     else if (!name) {
 362         if (!path)
 363             return NULL;
 364         name = stripath(path);
 365     }
 366     nlen = strlen(name);
 367     if (ext && nlen > 4 && name[nlen - 4] == '.' &&
 368         disttype(name + nlen - 3) == DISTINF)
 369         nlen -= 4;
 370     if (opt_dir) {
 371         path = opt_dir;
 372         plen = strlen(path);
 373     } else
 374         plen = path && (s = strrchr(path, '/')) != NULL ?
 375             (size_t)(s - path) : 0;
 376     if (plen + (plen > 0) + nlen + (ext ? 3 : 0) >= sizeof(buf))
 377         return NULL;
 378     s = buf;
 379     if (plen) {
 380         memcpy(s, path, plen);
 381         s += plen;
 382         *s++ = '/';
 383     }
 384     memcpy(s, name, nlen);
 385     s += nlen;
 386     if (ext) {
 387         *s++ = '.';
 388         memcpy(s, ext, 2);
 389         s += 2;
 390     }
 391     *s = 0;
 392     return buf;
 393 }
 394
 395 static const char *
 396 stripath(const char *path)
 397 {
 398     const char *s;
 399
 400     return ((s = strrchr(path, '/')) != NULL && s[1] ?
 401                     s + 1 : path);
 402 }
 403
 404 static int
 405 distfile(const char *path)
 406 {
 407     const char *s;
 408     int type;
 409
 410     if ((type = disttype(path)) == DISTMD5 ||
 411         ((s = strrchr(path, '.')) != NULL && s > path &&
 412          (type = disttype(s + 1)) != 0))
 413         return type;
 414     return 0;
 415 }
 416
 417 static int
 418 disttype(const char *name)
 419 {
 420     static const char dname[DISTTYPES][4] = {"md5", "inf"};
 421     int i;
 422
 423     for (i = 0; i < DISTTYPES; i++)
 424         if (!strcmp(dname[i], name))
 425             return 1 + i;
 426     return 0;
 427 }
 428
 429 static int
 430 fail(const char *path, const char *msg)
 431 {
 432     if (opt_silent)
 433         return 0;
 434     warnx("%s: %s", path, msg ? msg : sys_errlist[errno]);
 435     return 2;
 436 }
 437
 438 static void
 439 usage(void)
 440 {
 441     fprintf(stderr,
 442             "usage: ckdist [-airsx] [-d dir] [-n name] [-t type] file ...\n");
 443     exit(2);
 444 }