tests/fssum.c

   1 /*
   2  * Copyright (C) 2012 STRATO AG.  All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public
   6  * License v2 as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public
  14  * License along with this program; if not, write to the
  15  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  16  * Boston, MA 021110-1307, USA.
  17  */
  18
  19 #define _BSD_SOURCE
  20 #define _LARGEFILE64_SOURCE
  21 #ifndef _GNU_SOURCE
  22 #define _GNU_SOURCE
  23 #endif
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <unistd.h>
  27 #include <string.h>
  28 #include <fcntl.h>
  29 #include <dirent.h>
  30 #include <errno.h>
  31 #include <sys/types.h>
  32 #include <sys/stat.h>
  33 #include <openssl/md5.h>
  34 #include <netinet/in.h>
  35 #include <inttypes.h>
  36 #include <assert.h>
  37
  38 #define CS_SIZE 16
  39 #define CHUNKS  128
  40
  41 #ifndef SEEK_DATA
  42 #define SEEK_DATA 3
  43 #define SEEK_HOLE 4
  44 #endif
  45
  46 #if __BYTE_ORDER == __LITTLE_ENDIAN
  47 #define htonll(x)     __bswap_64 (x)
  48 #else
  49 #define htonll(x)     (x)
  50 #endif
  51
  52 /* TODO: add hardlink recognition */
  53 /* TODO: add xattr/acl */
  54
  55 struct excludes {
  56         char *path;
  57         int len;
  58 };
  59
  60 typedef struct _sum {
  61         MD5_CTX         md5;
  62         unsigned char   out[16];
  63 } sum_t;
  64
  65 typedef int (*sum_file_data_t)(int fd, sum_t *dst);
  66
  67 int gen_manifest = 0;
  68 int in_manifest = 0;
  69 char *checksum = NULL;
  70 struct excludes *excludes;
  71 int n_excludes = 0;
  72 int verbose = 0;
  73 FILE *out_fp;
  74 FILE *in_fp;
  75
  76 enum _flags {
  77         FLAG_UID,
  78         FLAG_GID,
  79         FLAG_MODE,
  80         FLAG_ATIME,
  81         FLAG_MTIME,
  82         FLAG_CTIME,
  83         FLAG_DATA,
  84         FLAG_OPEN_ERROR,
  85         FLAG_STRUCTURE,
  86         NUM_FLAGS
  87 };
  88
  89 const char flchar[] = "ugoamcdes";
  90 char line[65536];
  91
  92 int flags[NUM_FLAGS] = {1, 1, 1, 1, 1, 0, 1, 0, 0};
  93
  94 char *
  95 getln(char *buf, int size, FILE *fp)
  96 {
  97         char *p;
  98         int l;
  99
 100         p = fgets(buf, size, fp);
 101         if (!p)
 102                 return NULL;
 103
 104         l = strlen(p);
 105         while(l > 0  && (p[l - 1] == '\n' || p[l - 1] == '\r'))
 106                 p[--l] = 0;
 107
 108         return p;
 109 }
 110
 111 void
 112 parse_flag(int c)
 113 {
 114         int i;
 115         int is_upper = 0;
 116
 117         if (c >= 'A' && c <= 'Z') {
 118                 is_upper = 1;
 119                 c += 'a' - 'A';
 120         }
 121         for (i = 0; flchar[i]; ++i) {
 122                 if (flchar[i] == c) {
 123                         flags[i] = is_upper ? 0 : 1;
 124                         return;
 125                 }
 126         }
 127         fprintf(stderr, "unrecognized flag %c\n", c);
 128         exit(-1);
 129 }
 130
 131 void
 132 parse_flags(char *p)
 133 {
 134         while (*p)
 135                 parse_flag(*p++);
 136 }
 137
 138 void
 139 usage(void)
 140 {
 141         fprintf(stderr, "usage: fssum <options> <path>\n");
 142         fprintf(stderr, "  options:\n");
 143         fprintf(stderr, "    -f          : write out a full manifest file\n");
 144         fprintf(stderr, "    -w <file>   : send output to file\n");
 145         fprintf(stderr, "    -v          : verbose mode (debugging only)\n");
 146         fprintf(stderr,
 147                 "    -r <file>   : read checksum or manifest from file\n");
 148         fprintf(stderr, "    -[ugoamcde] : specify which fields to include in checksum calculation.\n");
 149         fprintf(stderr, "         u      : include uid\n");
 150         fprintf(stderr, "         g      : include gid\n");
 151         fprintf(stderr, "         o      : include mode\n");
 152         fprintf(stderr, "         m      : include mtime\n");
 153         fprintf(stderr, "         a      : include atime\n");
 154         fprintf(stderr, "         c      : include ctime\n");
 155         fprintf(stderr, "         d      : include file data\n");
 156         fprintf(stderr, "         e      : include open errors (aborts otherwise)\n");
 157         fprintf(stderr, "         s      : include block structure (holes)\n");
 158         fprintf(stderr, "    -[UGOAMCDES]: exclude respective field from calculation\n");
 159         fprintf(stderr, "    -n          : reset all flags\n");
 160         fprintf(stderr, "    -N          : set all flags\n");
 161         fprintf(stderr, "    -x path     : exclude path when building checksum (multiple ok)\n");
 162         fprintf(stderr, "    -h          : this help\n\n");
 163         fprintf(stderr, "The default field mask is ugoamCdES. If the checksum/manifest is read from a\n");
 164         fprintf(stderr, "file, the mask is taken from there and the values given on the command line\n");
 165         fprintf(stderr, "are ignored.\n");
 166         exit(-1);
 167 }
 168
 169 static char buf[65536];
 170
 171 void *
 172 alloc(size_t sz)
 173 {
 174         void *p = malloc(sz);
 175
 176         if (!p) {
 177                 fprintf(stderr, "malloc failed\n");
 178                 exit(-1);
 179         }
 180
 181         return p;
 182 }
 183
 184 void
 185 sum_init(sum_t *cs)
 186 {
 187         MD5_Init(&cs->md5);
 188 }
 189
 190 void
 191 sum_fini(sum_t *cs)
 192 {
 193         MD5_Final(cs->out, &cs->md5);
 194 }
 195
 196 void
 197 sum_add(sum_t *cs, void *buf, int size)
 198 {
 199         MD5_Update(&cs->md5, buf, size);
 200 }
 201
 202 void
 203 sum_add_sum(sum_t *dst, sum_t *src)
 204 {
 205         sum_add(dst, src->out, sizeof(src->out));
 206 }
 207
 208 void
 209 sum_add_u64(sum_t *dst, uint64_t val)
 210 {
 211         uint64_t v = htonll(val);
 212         sum_add(dst, &v, sizeof(v));
 213 }
 214
 215 void
 216 sum_add_time(sum_t *dst, time_t t)
 217 {
 218         sum_add_u64(dst, t);
 219 }
 220
 221 char *
 222 sum_to_string(sum_t *dst)
 223 {
 224         int i;
 225         char *s = alloc(CS_SIZE * 2 + 1);
 226
 227         for (i = 0; i < CS_SIZE; ++i)
 228                 sprintf(s + i * 2, "%02x", dst->out[i]);
 229
 230         return s;
 231 }
 232
 233 int
 234 sum_file_data_permissive(int fd, sum_t *dst)
 235 {
 236         int ret;
 237         off_t pos;
 238         off_t old;
 239         int i;
 240         uint64_t zeros = 0;
 241
 242         pos = lseek(fd, 0, SEEK_CUR);
 243         if (pos == (off_t)-1)
 244                 return errno == ENXIO ? 0 : -2;
 245
 246         while (1) {
 247                 old = pos;
 248                 pos = lseek(fd, pos, SEEK_DATA);
 249                 if (pos == (off_t)-1) {
 250                         if (errno == ENXIO) {
 251                                 ret = 0;
 252                                 pos = lseek(fd, 0, SEEK_END);
 253                                 if (pos != (off_t)-1)
 254                                         zeros += pos - old;
 255                         } else {
 256                                 ret = -2;
 257                         }
 258                         break;
 259                 }
 260                 ret = read(fd, buf, sizeof(buf));
 261                 assert(ret); /* eof found by lseek */
 262                 if (ret <= 0)
 263                         break;
 264                 if (old < pos) /* hole */
 265                         zeros += pos - old;
 266                 for (i = 0; i < ret; ++i) {
 267                         for (old = i; buf[i] == 0 && i < ret; ++i)
 268                                 ;
 269                         if (old < i) /* code like a hole */
 270                                 zeros += i - old;
 271                         if (i == ret)
 272                                 break;
 273                         if (zeros) {
 274                                 if (verbose >= 2)
 275                                         fprintf(stderr,
 276                                                 "adding %llu zeros to sum\n",
 277                                                 (unsigned long long)zeros);
 278                                 sum_add_u64(dst, 0);
 279                                 sum_add_u64(dst, zeros);
 280                                 zeros = 0;
 281                         }
 282                         for (old = i; buf[i] != 0 && i < ret; ++i)
 283                                 ;
 284                         if (verbose >= 2)
 285                                 fprintf(stderr, "adding %u non-zeros to sum\n",
 286                                         i - (int)old);
 287                         sum_add(dst, buf + old, i - old);
 288                 }
 289                 pos += ret;
 290         }
 291
 292         if (zeros) {
 293                 if (verbose >= 2)
 294                         fprintf(stderr,
 295                                 "adding %llu zeros to sum (finishing)\n",
 296                                 (unsigned long long)zeros);
 297                 sum_add_u64(dst, 0);
 298                 sum_add_u64(dst, zeros);
 299         }
 300
 301         return ret;
 302 }
 303
 304 int
 305 sum_file_data_strict(int fd, sum_t *dst)
 306 {
 307         int ret;
 308         off_t pos;
 309
 310         pos = lseek(fd, 0, SEEK_CUR);
 311         if (pos == (off_t)-1)
 312                 return errno == ENXIO ? 0 : -2;
 313
 314         while (1) {
 315                 pos = lseek(fd, pos, SEEK_DATA);
 316                 if (pos == (off_t)-1)
 317                         return errno == ENXIO ? 0 : -2;
 318                 ret = read(fd, buf, sizeof(buf));
 319                 assert(ret); /* eof found by lseek */
 320                 if (ret <= 0)
 321                         return ret;
 322                 if (verbose >= 2)
 323                         fprintf(stderr,
 324                                 "adding to sum at file offset %llu, %d bytes\n",
 325                                 (unsigned long long)pos, ret);
 326                 sum_add_u64(dst, (uint64_t)pos);
 327                 sum_add(dst, buf, ret);
 328                 pos += ret;
 329         }
 330 }
 331
 332 char *
 333 escape(char *in)
 334 {
 335         char *out = alloc(strlen(in) * 3 + 1);
 336         char *src = in;
 337         char *dst = out;
 338
 339         for (; *src; ++src) {
 340                 if (*src >= 32 && *src < 127 && *src != '\\') {
 341                         *dst++ = *src;
 342                 } else {
 343                         sprintf(dst, "\\%02x", (unsigned char)*src);
 344                         dst += 3;
 345                 }
 346         }
 347         *dst = 0;
 348
 349         return out;
 350 }
 351
 352 void
 353 excess_file(const char *fn)
 354 {
 355         printf("only in local fs: %s\n", fn);
 356 }
 357
 358 void
 359 missing_file(const char *fn)
 360 {
 361         printf("only in remote fs: %s\n", fn);
 362 }
 363
 364 int
 365 pathcmp(const char *a, const char *b)
 366 {
 367         int len_a = strlen(a);
 368         int len_b = strlen(b);
 369
 370         /*
 371          * as the containing directory is sent after the files, it has to
 372          * come out bigger in the comparison.
 373          */
 374         if (len_a < len_b && a[len_a - 1] == '/' && strncmp(a, b, len_a) == 0)
 375                 return 1;
 376         if (len_a > len_b && b[len_b - 1] == '/' && strncmp(a, b, len_b) == 0)
 377                 return -1;
 378
 379         return strcmp(a, b);
 380 }
 381
 382 void
 383 check_match(char *fn, char *local_m, char *remote_m,
 384             char *local_c, char *remote_c)
 385 {
 386         int match_m = !strcmp(local_m, remote_m);
 387         int match_c = !strcmp(local_c, remote_c);
 388
 389         if (match_m && !match_c) {
 390                 printf("data mismatch in %s\n", fn);
 391         } else if (!match_m && match_c) {
 392                 printf("metadata mismatch in %s\n", fn);
 393         } else if (!match_m && !match_c) {
 394                 printf("metadata and data mismatch in %s\n", fn);
 395         }
 396 }
 397
 398 char *prev_fn;
 399 char *prev_m;
 400 char *prev_c;
 401 void
 402 check_manifest(char *fn, char *m, char *c, int last_call)
 403 {
 404         char *rem_m;
 405         char *rem_c;
 406         char *l;
 407         int cmp;
 408
 409         if (prev_fn) {
 410                 if (last_call)
 411                         cmp = -1;
 412                 else
 413                         cmp = pathcmp(prev_fn, fn);
 414                 if (cmp > 0) {
 415                         excess_file(fn);
 416                         return;
 417                 } else if (cmp < 0) {
 418                         missing_file(prev_fn);
 419                 } else {
 420                         check_match(fn, m, prev_m, c, prev_c);
 421                 }
 422                 free(prev_fn);
 423                 free(prev_m);
 424                 free(prev_c);
 425                 prev_fn = NULL;
 426                 prev_m = NULL;
 427                 prev_c = NULL;
 428                 if (cmp == 0)
 429                         return;
 430         }
 431         while ((l = getln(line, sizeof(line), in_fp))) {
 432                 rem_c = strrchr(l, ' ');
 433                 if (!rem_c) {
 434                         /* final cs */
 435                         checksum = strdup(l);
 436                         break;
 437                 }
 438                 if (rem_c == l) {
 439 malformed:
 440                         fprintf(stderr, "malformed input\n");
 441                         exit(-1);
 442                 }
 443                 *rem_c++ = 0;
 444                 rem_m = strrchr(l, ' ');
 445                 if (!rem_m)
 446                         goto malformed;
 447                 *rem_m++ = 0;
 448
 449                 if (last_call)
 450                         cmp = -1;
 451                 else
 452                         cmp = pathcmp(l, fn);
 453                 if (cmp == 0) {
 454                         check_match(fn, m, rem_m, c, rem_c);
 455                         return;
 456                 } else if (cmp > 0) {
 457                         excess_file(fn);
 458                         prev_fn = strdup(l);
 459                         prev_m = strdup(rem_m);
 460                         prev_c = strdup(rem_c);
 461                         return;
 462                 }
 463                 missing_file(l);
 464         }
 465         if (!last_call)
 466                 excess_file(fn);
 467 }
 468
 469 int
 470 namecmp(const void *aa, const void *bb)
 471 {
 472         char * const *a = aa;
 473         char * const *b = bb;
 474
 475         return strcmp(*a, *b);
 476 }
 477
 478 void
 479 sum(int dirfd, int level, sum_t *dircs, char *path_prefix, char *path_in)
 480 {
 481         DIR *d;
 482         struct dirent *de;
 483         char **namelist = NULL;
 484         int alloclen = 0;
 485         int entries = 0;
 486         int i;
 487         int ret;
 488         int fd;
 489         int excl;
 490         sum_file_data_t sum_file_data = flags[FLAG_STRUCTURE] ?
 491                         sum_file_data_strict : sum_file_data_permissive;
 492
 493         d = fdopendir(dirfd);
 494         if (!d) {
 495                 perror("opendir");
 496                 exit(-1);
 497         }
 498         while((de = readdir(d))) {
 499                 if (!strcmp(de->d_name, ".") || !strcmp(de->d_name, ".."))
 500                         continue;
 501                 if (entries == alloclen) {
 502                         alloclen += CHUNKS;
 503                         namelist = realloc(namelist,
 504                                            alloclen * sizeof(*namelist));
 505                         if (!namelist) {
 506                                 fprintf(stderr, "malloc failed\n");
 507                                 exit(-1);
 508                         }
 509                 }
 510                 namelist[entries] = strdup(de->d_name);
 511                 if (!namelist[entries]) {
 512                         fprintf(stderr, "malloc failed\n");
 513                         exit(-1);
 514                 }
 515                 ++entries;
 516         }
 517         qsort(namelist, entries, sizeof(*namelist), namecmp);
 518         for (i = 0; i < entries; ++i) {
 519                 struct stat64 st;
 520                 sum_t cs;
 521                 sum_t meta;
 522                 char *path;
 523
 524                 sum_init(&cs);
 525                 sum_init(&meta);
 526                 path = alloc(strlen(path_in) + strlen(namelist[i]) + 3);
 527                 sprintf(path, "%s/%s", path_in, namelist[i]);
 528                 for (excl = 0; excl < n_excludes; ++excl) {
 529                         if (strncmp(excludes[excl].path, path,
 530                             excludes[excl].len) == 0)
 531                                 goto next;
 532                 }
 533
 534                 ret = fchdir(dirfd);
 535                 if (ret == -1) {
 536                         perror("fchdir");
 537                         exit(-1);
 538                 }
 539                 ret = lstat64(namelist[i], &st);
 540                 if (ret) {
 541                         fprintf(stderr, "stat failed for %s/%s: %s\n",
 542                                 path_prefix, path, strerror(errno));
 543                         exit(-1);
 544                 }
 545                 sum_add_u64(&meta, level);
 546                 sum_add(&meta, namelist[i], strlen(namelist[i]));
 547                 if (!S_ISDIR(st.st_mode))
 548                         sum_add_u64(&meta, st.st_nlink);
 549                 if (flags[FLAG_UID])
 550                         sum_add_u64(&meta, st.st_uid);
 551                 if (flags[FLAG_GID])
 552                         sum_add_u64(&meta, st.st_gid);
 553                 if (flags[FLAG_MODE])
 554                         sum_add_u64(&meta, st.st_mode);
 555                 if (flags[FLAG_ATIME])
 556                         sum_add_time(&meta, st.st_atime);
 557                 if (flags[FLAG_MTIME])
 558                         sum_add_time(&meta, st.st_mtime);
 559                 if (flags[FLAG_CTIME])
 560                         sum_add_time(&meta, st.st_ctime);
 561                 if (S_ISDIR(st.st_mode)) {
 562                         fd = openat(dirfd, namelist[i], 0);
 563                         if (fd == -1 && flags[FLAG_OPEN_ERROR]) {
 564                                 sum_add_u64(&meta, errno);
 565                         } else if (fd == -1) {
 566                                 fprintf(stderr, "open failed for %s/%s: %s\n",
 567                                         path_prefix, path, strerror(errno));
 568                                 exit(-1);
 569                         } else {
 570                                 sum(fd, level + 1, &cs, path_prefix, path);
 571                                 close(fd);
 572                         }
 573                 } else if (S_ISREG(st.st_mode)) {
 574                         sum_add_u64(&meta, st.st_size);
 575                         if (flags[FLAG_DATA]) {
 576                                 if (verbose)
 577                                         fprintf(stderr, "file %s\n",
 578                                                 namelist[i]);
 579                                 fd = openat(dirfd, namelist[i], 0);
 580                                 if (fd == -1 && flags[FLAG_OPEN_ERROR]) {
 581                                         sum_add_u64(&meta, errno);
 582                                 } else if (fd == -1) {
 583                                         fprintf(stderr,
 584                                                 "open failed for %s/%s: %s\n",
 585                                                 path_prefix, path,
 586                                                 strerror(errno));
 587                                         exit(-1);
 588                                 }
 589                                 if (fd != -1) {
 590                                         ret = sum_file_data(fd, &cs);
 591                                         if (ret < 0) {
 592                                                 fprintf(stderr,
 593                                                         "read failed for "
 594                                                         "%s/%s: %s\n",
 595                                                         path_prefix, path,
 596                                                         strerror(errno));
 597                                                 exit(-1);
 598                                         }
 599                                         close(fd);
 600                                 }
 601                         }
 602                 } else if (S_ISLNK(st.st_mode)) {
 603                         ret = readlink(namelist[i], buf, sizeof(buf));
 604                         if (ret == -1) {
 605                                 perror("readlink");
 606                                 exit(-1);
 607                         }
 608                         sum_add(&cs, buf, ret);
 609                 } else if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
 610                         sum_add_u64(&cs, major(st.st_rdev));
 611                         sum_add_u64(&cs, minor(st.st_rdev));
 612                 }
 613                 sum_fini(&cs);
 614                 sum_fini(&meta);
 615                 if (gen_manifest || in_manifest) {
 616                         char *fn;
 617                         char *m;
 618                         char *c;
 619
 620                         if (S_ISDIR(st.st_mode))
 621                                 strcat(path, "/");
 622                         fn = escape(path);
 623                         m = sum_to_string(&meta);
 624                         c = sum_to_string(&cs);
 625
 626                         if (gen_manifest)
 627                                 fprintf(out_fp, "%s %s %s\n", fn, m, c);
 628                         if (in_manifest)
 629                                 check_manifest(fn, m, c, 0);
 630                         free(c);
 631                         free(m);
 632                         free(fn);
 633                 }
 634                 sum_add_sum(dircs, &cs);
 635                 sum_add_sum(dircs, &meta);
 636 next:
 637                 free(path);
 638         }
 639 }
 640
 641 int
 642 main(int argc, char *argv[])
 643 {
 644         extern char *optarg;
 645         extern int optind;
 646         int     c;
 647         char *path;
 648         int fd;
 649         sum_t cs;
 650         char flagstring[sizeof(flchar)];
 651         int i;
 652         int plen;
 653         int elen;
 654         int n_flags = 0;
 655         const char *allopts = "heEfuUgGoOaAmMcCdDsSnNw:r:vx:";
 656
 657         out_fp = stdout;
 658         while ((c = getopt(argc, argv, allopts)) != EOF) {
 659                 switch(c) {
 660                 case 'f':
 661                         gen_manifest = 1;
 662                         break;
 663                 case 'u':
 664                 case 'U':
 665                 case 'g':
 666                 case 'G':
 667                 case 'o':
 668                 case 'O':
 669                 case 'a':
 670                 case 'A':
 671                 case 'm':
 672                 case 'M':
 673                 case 'c':
 674                 case 'C':
 675                 case 'd':
 676                 case 'D':
 677                 case 'e':
 678                 case 'E':
 679                 case 's':
 680                 case 'S':
 681                         ++n_flags;
 682                         parse_flag(c);
 683                         break;
 684                 case 'n':
 685                         for (i = 0; i < NUM_FLAGS; ++i)
 686                                 flags[i] = 0;
 687                         break;
 688                 case 'N':
 689                         for (i = 0; i < NUM_FLAGS; ++i)
 690                                 flags[i] = 1;
 691                         break;
 692                 case 'w':
 693                         out_fp = fopen(optarg, "w");
 694                         if (!out_fp) {
 695                                 fprintf(stderr,
 696                                         "failed to open output file: %s\n",
 697                                         strerror(errno));
 698                                 exit(-1);
 699                         }
 700                         break;
 701                 case 'r':
 702                         in_fp = fopen(optarg, "r");
 703                         if (!in_fp) {
 704                                 fprintf(stderr,
 705                                         "failed to open input file: %s\n",
 706                                         strerror(errno));
 707                                 exit(-1);
 708                         }
 709                         break;
 710                 case 'x':
 711                         ++n_excludes;
 712                         excludes = realloc(excludes,
 713                                            sizeof(*excludes) * n_excludes);
 714                         if (!excludes) {
 715                                 fprintf(stderr,
 716                                         "failed to alloc exclude space\n");
 717                                 exit(-1);
 718                         }
 719                         excludes[n_excludes - 1].path = optarg;
 720                         break;
 721                 case 'v':
 722                         ++verbose;
 723                         break;
 724                 case 'h':
 725                 case '?':
 726                         usage();
 727                 }
 728         }
 729
 730         if (optind + 1 != argc) {
 731                 fprintf(stderr, "missing path\n");
 732                 usage();
 733         }
 734
 735         if (in_fp) {
 736                 char *l = getln(line, sizeof(line), in_fp);
 737                 char *p;
 738
 739                 if (l == NULL) {
 740                         fprintf(stderr, "failed to read line from input\n");
 741                         exit(-1);
 742                 }
 743                 if (strncmp(l, "Flags: ", 7) == 0) {
 744                         l += 7;
 745                         in_manifest = 1;
 746                         parse_flags(l);
 747                 } else if ((p = strchr(l, ':'))) {
 748                         *p++ = 0;
 749                         parse_flags(l);
 750                         checksum = strdup(p);
 751                 } else {
 752                         fprintf(stderr, "invalid input file format\n");
 753                         exit(-1);
 754                 }
 755                 if (n_flags)
 756                         fprintf(stderr, "warning: "
 757                                 "command line flags ignored in -r mode\n");
 758         }
 759         strcpy(flagstring, flchar);
 760         for (i = 0; i < NUM_FLAGS; ++i) {
 761                 if (flags[i] == 0)
 762                         flagstring[i] -= 'a' - 'A';
 763         }
 764
 765         path = argv[optind];
 766         plen = strlen(path);
 767         if (path[plen - 1] == '/') {
 768                 --plen;
 769                 path[plen] = '\0';
 770         }
 771
 772         for (i = 0; i < n_excludes; ++i) {
 773                 if (strncmp(path, excludes[i].path, plen) != 0)
 774                         fprintf(stderr,
 775                                 "warning: exclude %s outside of path %s\n",
 776                                 excludes[i].path, path);
 777                 else
 778                         excludes[i].path += plen;
 779                 elen = strlen(excludes[i].path);
 780                 if (excludes[i].path[elen - 1] == '/')
 781                         --elen;
 782                 excludes[i].path[elen] = '\0';
 783                 excludes[i].len = elen;
 784         }
 785
 786         fd = open(path, O_RDONLY);
 787         if (fd == -1) {
 788                 fprintf(stderr, "failed to open %s: %s\n", path,
 789                         strerror(errno));
 790                 exit(-1);
 791         }
 792
 793         if (gen_manifest)
 794                 fprintf(out_fp, "Flags: %s\n", flagstring);
 795
 796         sum_init(&cs);
 797         sum(fd, 1, &cs, path, "");
 798         sum_fini(&cs);
 799
 800         close(fd);
 801         if (in_manifest)
 802                 check_manifest("", "", "", 1);
 803
 804         if (!checksum) {
 805                 if (in_manifest) {
 806                         fprintf(stderr, "malformed input\n");
 807                         exit(-1);
 808                 }
 809                 if (!gen_manifest)
 810                         fprintf(out_fp, "%s:", flagstring);
 811
 812                 fprintf(out_fp, "%s\n", sum_to_string(&cs));
 813         } else {
 814                 if (strcmp(checksum, sum_to_string(&cs)) == 0) {
 815                         printf("OK\n");
 816                         exit(0);
 817                 } else {
 818                         printf("FAIL\n");
 819                         exit(1);
 820                 }
 821         }
 822
 823         exit(0);
 824 }