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 #include "kerncompat.h"
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <unistd.h>
  23 #include <string.h>
  24 #include <fcntl.h>
  25 #include <dirent.h>
  26 #include <errno.h>
  27 #include <sys/stat.h>
  28 #include <assert.h>
  29 #include <time.h>
  30 #include <stdint.h>
  31 #include "tests/sha.h"
  32
  33 #define CS_SIZE 32
  34 #define CHUNKS  128
  35
  36 #ifndef SEEK_DATA
  37 #define SEEK_DATA 3
  38 #define SEEK_HOLE 4
  39 #endif
  40
  41 /* TODO: add hardlink recognition */
  42 /* TODO: add xattr/acl */
  43
  44 struct excludes {
  45         char *path;
  46         int len;
  47 };
  48
  49 typedef struct _sum {
  50         SHA256Context   sha;
  51         unsigned char   out[CS_SIZE];
  52 } sum_t;
  53
  54 typedef int (*sum_file_data_t)(int fd, sum_t *dst);
  55
  56 int gen_manifest = 0;
  57 int in_manifest = 0;
  58 char *checksum = NULL;
  59 struct excludes *excludes;
  60 int n_excludes = 0;
  61 int verbose = 0;
  62 FILE *out_fp;
  63 FILE *in_fp;
  64
  65 enum _flags {
  66         FLAG_UID,
  67         FLAG_GID,
  68         FLAG_MODE,
  69         FLAG_ATIME,
  70         FLAG_MTIME,
  71         FLAG_CTIME,
  72         FLAG_DATA,
  73         FLAG_OPEN_ERROR,
  74         FLAG_STRUCTURE,
  75         NUM_FLAGS
  76 };
  77
  78 const char flchar[] = "ugoamcdes";
  79 char line[65536];
  80
  81 int flags[NUM_FLAGS] = {1, 1, 1, 1, 1, 0, 1, 0, 0};
  82
  83 char *
  84 getln(char *buf, int size, FILE *fp)
  85 {
  86         char *p;
  87         int l;
  88
  89         p = fgets(buf, size, fp);
  90         if (!p)
  91                 return NULL;
  92
  93         l = strlen(p);
  94         while(l > 0  && (p[l - 1] == '\n' || p[l - 1] == '\r'))
  95                 p[--l] = 0;
  96
  97         return p;
  98 }
  99
 100 void
 101 parse_flag(int c)
 102 {
 103         int i;
 104         int is_upper = 0;
 105
 106         if (c >= 'A' && c <= 'Z') {
 107                 is_upper = 1;
 108                 c += 'a' - 'A';
 109         }
 110         for (i = 0; flchar[i]; ++i) {
 111                 if (flchar[i] == c) {
 112                         flags[i] = is_upper ? 0 : 1;
 113                         return;
 114                 }
 115         }
 116         fprintf(stderr, "unrecognized flag %c\n", c);
 117         exit(-1);
 118 }
 119
 120 void
 121 parse_flags(char *p)
 122 {
 123         while (*p)
 124                 parse_flag(*p++);
 125 }
 126
 127 void
 128 usage(void)
 129 {
 130         fprintf(stderr, "usage: fssum <options> <path>\n");
 131         fprintf(stderr, "  options:\n");
 132         fprintf(stderr, "    -f          : write out a full manifest file\n");
 133         fprintf(stderr, "    -w <file>   : send output to file\n");
 134         fprintf(stderr, "    -v          : verbose mode (debugging only)\n");
 135         fprintf(stderr,
 136                 "    -r <file>   : read checksum or manifest from file\n");
 137         fprintf(stderr, "    -[ugoamcde] : specify which fields to include in checksum calculation.\n");
 138         fprintf(stderr, "         u      : include uid\n");
 139         fprintf(stderr, "         g      : include gid\n");
 140         fprintf(stderr, "         o      : include mode\n");
 141         fprintf(stderr, "         m      : include mtime\n");
 142         fprintf(stderr, "         a      : include atime\n");
 143         fprintf(stderr, "         c      : include ctime\n");
 144         fprintf(stderr, "         d      : include file data\n");
 145         fprintf(stderr, "         e      : include open errors (aborts otherwise)\n");
 146         fprintf(stderr, "         s      : include block structure (holes)\n");
 147         fprintf(stderr, "    -[UGOAMCDES]: exclude respective field from calculation\n");
 148         fprintf(stderr, "    -n          : reset all flags\n");
 149         fprintf(stderr, "    -N          : set all flags\n");
 150         fprintf(stderr, "    -x path     : exclude path when building checksum (multiple ok)\n");
 151         fprintf(stderr, "    -h          : this help\n\n");
 152         fprintf(stderr, "The default field mask is ugoamCdES. If the checksum/manifest is read from a\n");
 153         fprintf(stderr, "file, the mask is taken from there and the values given on the command line\n");
 154         fprintf(stderr, "are ignored.\n");
 155         exit(-1);
 156 }
 157
 158 static char buf[65536];
 159
 160 void *
 161 alloc(size_t sz)
 162 {
 163         void *p = malloc(sz);
 164
 165         if (!p) {
 166                 fprintf(stderr, "malloc failed\n");
 167                 exit(-1);
 168         }
 169
 170         return p;
 171 }
 172
 173 void
 174 sum_init(sum_t *cs)
 175 {
 176         SHA256Reset(&cs->sha);
 177 }
 178
 179 void
 180 sum_fini(sum_t *cs)
 181 {
 182         SHA256Result(&cs->sha, cs->out);
 183 }
 184
 185 void
 186 sum_add(sum_t *cs, void *buf, int size)
 187 {
 188         SHA256Input(&cs->sha, buf, size);
 189 }
 190
 191 void
 192 sum_add_sum(sum_t *dst, sum_t *src)
 193 {
 194         sum_add(dst, src->out, sizeof(src->out));
 195 }
 196
 197 void
 198 sum_add_u64(sum_t *dst, uint64_t val)
 199 {
 200         uint64_t v = cpu_to_le64(val);
 201         sum_add(dst, &v, sizeof(v));
 202 }
 203
 204 void
 205 sum_add_time(sum_t *dst, time_t t)
 206 {
 207         sum_add_u64(dst, t);
 208 }
 209
 210 char *
 211 sum_to_string(sum_t *dst)
 212 {
 213         int i;
 214         char *s = alloc(CS_SIZE * 2 + 1);
 215
 216         for (i = 0; i < CS_SIZE; ++i)
 217                 sprintf(s + i * 2, "%02x", dst->out[i]);
 218
 219         return s;
 220 }
 221
 222 int
 223 sum_file_data_permissive(int fd, sum_t *dst)
 224 {
 225         int ret;
 226         off_t pos;
 227         off_t old;
 228         int i;
 229         uint64_t zeros = 0;
 230
 231         pos = lseek(fd, 0, SEEK_CUR);
 232         if (pos == (off_t)-1)
 233                 return errno == ENXIO ? 0 : -2;
 234
 235         while (1) {
 236                 old = pos;
 237                 pos = lseek(fd, pos, SEEK_DATA);
 238                 if (pos == (off_t)-1) {
 239                         if (errno == ENXIO) {
 240                                 ret = 0;
 241                                 pos = lseek(fd, 0, SEEK_END);
 242                                 if (pos != (off_t)-1)
 243                                         zeros += pos - old;
 244                         } else {
 245                                 ret = -2;
 246                         }
 247                         break;
 248                 }
 249                 ret = read(fd, buf, sizeof(buf));
 250                 assert(ret); /* eof found by lseek */
 251                 if (ret <= 0)
 252                         break;
 253                 if (old < pos) /* hole */
 254                         zeros += pos - old;
 255                 for (i = 0; i < ret; ++i) {
 256                         for (old = i; buf[i] == 0 && i < ret; ++i)
 257                                 ;
 258                         if (old < i) /* code like a hole */
 259                                 zeros += i - old;
 260                         if (i == ret)
 261                                 break;
 262                         if (zeros) {
 263                                 if (verbose >= 2)
 264                                         fprintf(stderr,
 265                                                 "adding %llu zeros to sum\n",
 266                                                 (unsigned long long)zeros);
 267                                 sum_add_u64(dst, 0);
 268                                 sum_add_u64(dst, zeros);
 269                                 zeros = 0;
 270                         }
 271                         for (old = i; buf[i] != 0 && i < ret; ++i)
 272                                 ;
 273                         if (verbose >= 2)
 274                                 fprintf(stderr, "adding %u non-zeros to sum\n",
 275                                         i - (int)old);
 276                         sum_add(dst, buf + old, i - old);
 277                 }
 278                 pos += ret;
 279         }
 280
 281         if (zeros) {
 282                 if (verbose >= 2)
 283                         fprintf(stderr,
 284                                 "adding %llu zeros to sum (finishing)\n",
 285                                 (unsigned long long)zeros);
 286                 sum_add_u64(dst, 0);
 287                 sum_add_u64(dst, zeros);
 288         }
 289
 290         return ret;
 291 }
 292
 293 int
 294 sum_file_data_strict(int fd, sum_t *dst)
 295 {
 296         int ret;
 297         off_t pos;
 298
 299         pos = lseek(fd, 0, SEEK_CUR);
 300         if (pos == (off_t)-1)
 301                 return errno == ENXIO ? 0 : -2;
 302
 303         while (1) {
 304                 pos = lseek(fd, pos, SEEK_DATA);
 305                 if (pos == (off_t)-1)
 306                         return errno == ENXIO ? 0 : -2;
 307                 ret = read(fd, buf, sizeof(buf));
 308                 assert(ret); /* eof found by lseek */
 309                 if (ret <= 0)
 310                         return ret;
 311                 if (verbose >= 2)
 312                         fprintf(stderr,
 313                                 "adding to sum at file offset %llu, %d bytes\n",
 314                                 (unsigned long long)pos, ret);
 315                 sum_add_u64(dst, (uint64_t)pos);
 316                 sum_add(dst, buf, ret);
 317                 pos += ret;
 318         }
 319 }
 320
 321 char *
 322 escape(char *in)
 323 {
 324         char *out = alloc(strlen(in) * 3 + 1);
 325         char *src = in;
 326         char *dst = out;
 327
 328         for (; *src; ++src) {
 329                 if (*src >= 32 && *src < 127 && *src != '\\') {
 330                         *dst++ = *src;
 331                 } else {
 332                         sprintf(dst, "\\%02x", (unsigned char)*src);
 333                         dst += 3;
 334                 }
 335         }
 336         *dst = 0;
 337
 338         return out;
 339 }
 340
 341 void
 342 excess_file(const char *fn)
 343 {
 344         printf("only in local fs: %s\n", fn);
 345 }
 346
 347 void
 348 missing_file(const char *fn)
 349 {
 350         printf("only in remote fs: %s\n", fn);
 351 }
 352
 353 int
 354 pathcmp(const char *a, const char *b)
 355 {
 356         int len_a = strlen(a);
 357         int len_b = strlen(b);
 358
 359         /*
 360          * as the containing directory is sent after the files, it has to
 361          * come out bigger in the comparison.
 362          */
 363         if (len_a < len_b && a[len_a - 1] == '/' && strncmp(a, b, len_a) == 0)
 364                 return 1;
 365         if (len_a > len_b && b[len_b - 1] == '/' && strncmp(a, b, len_b) == 0)
 366                 return -1;
 367
 368         return strcmp(a, b);
 369 }
 370
 371 void
 372 check_match(char *fn, char *local_m, char *remote_m,
 373             char *local_c, char *remote_c)
 374 {
 375         int match_m = !strcmp(local_m, remote_m);
 376         int match_c = !strcmp(local_c, remote_c);
 377
 378         if (match_m && !match_c) {
 379                 printf("data mismatch in %s\n", fn);
 380         } else if (!match_m && match_c) {
 381                 printf("metadata mismatch in %s\n", fn);
 382         } else if (!match_m && !match_c) {
 383                 printf("metadata and data mismatch in %s\n", fn);
 384         }
 385 }
 386
 387 char *prev_fn;
 388 char *prev_m;
 389 char *prev_c;
 390 void
 391 check_manifest(char *fn, char *m, char *c, int last_call)
 392 {
 393         char *rem_m;
 394         char *rem_c;
 395         char *l;
 396         int cmp;
 397
 398         if (prev_fn) {
 399                 if (last_call)
 400                         cmp = -1;
 401                 else
 402                         cmp = pathcmp(prev_fn, fn);
 403                 if (cmp > 0) {
 404                         excess_file(fn);
 405                         return;
 406                 } else if (cmp < 0) {
 407                         missing_file(prev_fn);
 408                 } else {
 409                         check_match(fn, m, prev_m, c, prev_c);
 410                 }
 411                 free(prev_fn);
 412                 free(prev_m);
 413                 free(prev_c);
 414                 prev_fn = NULL;
 415                 prev_m = NULL;
 416                 prev_c = NULL;
 417                 if (cmp == 0)
 418                         return;
 419         }
 420         while ((l = getln(line, sizeof(line), in_fp))) {
 421                 rem_c = strrchr(l, ' ');
 422                 if (!rem_c) {
 423                         /* final cs */
 424                         checksum = strdup(l);
 425                         break;
 426                 }
 427                 if (rem_c == l) {
 428 malformed:
 429                         fprintf(stderr, "malformed input\n");
 430                         exit(-1);
 431                 }
 432                 *rem_c++ = 0;
 433                 rem_m = strrchr(l, ' ');
 434                 if (!rem_m)
 435                         goto malformed;
 436                 *rem_m++ = 0;
 437
 438                 if (last_call)
 439                         cmp = -1;
 440                 else
 441                         cmp = pathcmp(l, fn);
 442                 if (cmp == 0) {
 443                         check_match(fn, m, rem_m, c, rem_c);
 444                         return;
 445                 } else if (cmp > 0) {
 446                         excess_file(fn);
 447                         prev_fn = strdup(l);
 448                         prev_m = strdup(rem_m);
 449                         prev_c = strdup(rem_c);
 450                         return;
 451                 }
 452                 missing_file(l);
 453         }
 454         if (!last_call)
 455                 excess_file(fn);
 456 }
 457
 458 int
 459 namecmp(const void *aa, const void *bb)
 460 {
 461         char * const *a = aa;
 462         char * const *b = bb;
 463
 464         return strcmp(*a, *b);
 465 }
 466
 467 void
 468 sum(int dirfd, int level, sum_t *dircs, char *path_prefix, char *path_in)
 469 {
 470         DIR *d;
 471         struct dirent *de;
 472         char **namelist = NULL;
 473         int alloclen = 0;
 474         int entries = 0;
 475         int i;
 476         int ret;
 477         int fd;
 478         int excl;
 479         sum_file_data_t sum_file_data = flags[FLAG_STRUCTURE] ?
 480                         sum_file_data_strict : sum_file_data_permissive;
 481
 482         d = fdopendir(dirfd);
 483         if (!d) {
 484                 perror("opendir");
 485                 exit(-1);
 486         }
 487         while((de = readdir(d))) {
 488                 if (!strcmp(de->d_name, ".") || !strcmp(de->d_name, ".."))
 489                         continue;
 490                 if (entries == alloclen) {
 491                         alloclen += CHUNKS;
 492                         namelist = realloc(namelist,
 493                                            alloclen * sizeof(*namelist));
 494                         if (!namelist) {
 495                                 fprintf(stderr, "malloc failed\n");
 496                                 exit(-1);
 497                         }
 498                 }
 499                 namelist[entries] = strdup(de->d_name);
 500                 if (!namelist[entries]) {
 501                         fprintf(stderr, "malloc failed\n");
 502                         exit(-1);
 503                 }
 504                 ++entries;
 505         }
 506         qsort(namelist, entries, sizeof(*namelist), namecmp);
 507         for (i = 0; i < entries; ++i) {
 508                 struct stat64 st;
 509                 sum_t cs;
 510                 sum_t meta;
 511                 char *path;
 512
 513                 sum_init(&cs);
 514                 sum_init(&meta);
 515                 path = alloc(strlen(path_in) + strlen(namelist[i]) + 3);
 516                 sprintf(path, "%s/%s", path_in, namelist[i]);
 517                 for (excl = 0; excl < n_excludes; ++excl) {
 518                         if (strncmp(excludes[excl].path, path,
 519                             excludes[excl].len) == 0)
 520                                 goto next;
 521                 }
 522
 523                 ret = fchdir(dirfd);
 524                 if (ret == -1) {
 525                         perror("fchdir");
 526                         exit(-1);
 527                 }
 528                 ret = lstat64(namelist[i], &st);
 529                 if (ret) {
 530                         fprintf(stderr, "stat failed for %s/%s: %s\n",
 531                                 path_prefix, path, strerror(errno));
 532                         exit(-1);
 533                 }
 534                 sum_add_u64(&meta, level);
 535                 sum_add(&meta, namelist[i], strlen(namelist[i]));
 536                 if (!S_ISDIR(st.st_mode))
 537                         sum_add_u64(&meta, st.st_nlink);
 538                 if (flags[FLAG_UID])
 539                         sum_add_u64(&meta, st.st_uid);
 540                 if (flags[FLAG_GID])
 541                         sum_add_u64(&meta, st.st_gid);
 542                 if (flags[FLAG_MODE])
 543                         sum_add_u64(&meta, st.st_mode);
 544                 if (flags[FLAG_ATIME])
 545                         sum_add_time(&meta, st.st_atime);
 546                 if (flags[FLAG_MTIME])
 547                         sum_add_time(&meta, st.st_mtime);
 548                 if (flags[FLAG_CTIME])
 549                         sum_add_time(&meta, st.st_ctime);
 550                 if (S_ISDIR(st.st_mode)) {
 551                         fd = openat(dirfd, namelist[i], 0);
 552                         if (fd == -1 && flags[FLAG_OPEN_ERROR]) {
 553                                 sum_add_u64(&meta, errno);
 554                         } else if (fd == -1) {
 555                                 fprintf(stderr, "open failed for %s/%s: %s\n",
 556                                         path_prefix, path, strerror(errno));
 557                                 exit(-1);
 558                         } else {
 559                                 sum(fd, level + 1, &cs, path_prefix, path);
 560                                 close(fd);
 561                         }
 562                 } else if (S_ISREG(st.st_mode)) {
 563                         sum_add_u64(&meta, st.st_size);
 564                         if (flags[FLAG_DATA]) {
 565                                 if (verbose)
 566                                         fprintf(stderr, "file %s\n",
 567                                                 namelist[i]);
 568                                 fd = openat(dirfd, namelist[i], 0);
 569                                 if (fd == -1 && flags[FLAG_OPEN_ERROR]) {
 570                                         sum_add_u64(&meta, errno);
 571                                 } else if (fd == -1) {
 572                                         fprintf(stderr,
 573                                                 "open failed for %s/%s: %s\n",
 574                                                 path_prefix, path,
 575                                                 strerror(errno));
 576                                         exit(-1);
 577                                 }
 578                                 if (fd != -1) {
 579                                         ret = sum_file_data(fd, &cs);
 580                                         if (ret < 0) {
 581                                                 fprintf(stderr,
 582                                                         "read failed for "
 583                                                         "%s/%s: %s\n",
 584                                                         path_prefix, path,
 585                                                         strerror(errno));
 586                                                 exit(-1);
 587                                         }
 588                                         close(fd);
 589                                 }
 590                         }
 591                 } else if (S_ISLNK(st.st_mode)) {
 592                         ret = readlink(namelist[i], buf, sizeof(buf));
 593                         if (ret == -1) {
 594                                 perror("readlink");
 595                                 exit(-1);
 596                         }
 597                         sum_add(&cs, buf, ret);
 598                 } else if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
 599                         sum_add_u64(&cs, major(st.st_rdev));
 600                         sum_add_u64(&cs, minor(st.st_rdev));
 601                 }
 602                 sum_fini(&cs);
 603                 sum_fini(&meta);
 604                 if (gen_manifest || in_manifest) {
 605                         char *fn;
 606                         char *m;
 607                         char *c;
 608
 609                         if (S_ISDIR(st.st_mode))
 610                                 strcat(path, "/");
 611                         fn = escape(path);
 612                         m = sum_to_string(&meta);
 613                         c = sum_to_string(&cs);
 614
 615                         if (gen_manifest)
 616                                 fprintf(out_fp, "%s %s %s\n", fn, m, c);
 617                         if (in_manifest)
 618                                 check_manifest(fn, m, c, 0);
 619                         free(c);
 620                         free(m);
 621                         free(fn);
 622                 }
 623                 sum_add_sum(dircs, &cs);
 624                 sum_add_sum(dircs, &meta);
 625 next:
 626                 free(path);
 627         }
 628 }
 629
 630 int
 631 main(int argc, char *argv[])
 632 {
 633         extern char *optarg;
 634         extern int optind;
 635         int     c;
 636         char *path;
 637         int fd;
 638         sum_t cs;
 639         char flagstring[sizeof(flchar)];
 640         int i;
 641         int plen;
 642         int elen;
 643         int n_flags = 0;
 644         const char *allopts = "heEfuUgGoOaAmMcCdDsSnNw:r:vx:";
 645
 646         out_fp = stdout;
 647         while ((c = getopt(argc, argv, allopts)) != EOF) {
 648                 switch(c) {
 649                 case 'f':
 650                         gen_manifest = 1;
 651                         break;
 652                 case 'u':
 653                 case 'U':
 654                 case 'g':
 655                 case 'G':
 656                 case 'o':
 657                 case 'O':
 658                 case 'a':
 659                 case 'A':
 660                 case 'm':
 661                 case 'M':
 662                 case 'c':
 663                 case 'C':
 664                 case 'd':
 665                 case 'D':
 666                 case 'e':
 667                 case 'E':
 668                 case 's':
 669                 case 'S':
 670                         ++n_flags;
 671                         parse_flag(c);
 672                         break;
 673                 case 'n':
 674                         for (i = 0; i < NUM_FLAGS; ++i)
 675                                 flags[i] = 0;
 676                         break;
 677                 case 'N':
 678                         for (i = 0; i < NUM_FLAGS; ++i)
 679                                 flags[i] = 1;
 680                         break;
 681                 case 'w':
 682                         out_fp = fopen(optarg, "w");
 683                         if (!out_fp) {
 684                                 fprintf(stderr,
 685                                         "failed to open output file: %s\n",
 686                                         strerror(errno));
 687                                 exit(-1);
 688                         }
 689                         break;
 690                 case 'r':
 691                         in_fp = fopen(optarg, "r");
 692                         if (!in_fp) {
 693                                 fprintf(stderr,
 694                                         "failed to open input file: %s\n",
 695                                         strerror(errno));
 696                                 exit(-1);
 697                         }
 698                         break;
 699                 case 'x':
 700                         ++n_excludes;
 701                         excludes = realloc(excludes,
 702                                            sizeof(*excludes) * n_excludes);
 703                         if (!excludes) {
 704                                 fprintf(stderr,
 705                                         "failed to alloc exclude space\n");
 706                                 exit(-1);
 707                         }
 708                         excludes[n_excludes - 1].path = optarg;
 709                         break;
 710                 case 'v':
 711                         ++verbose;
 712                         break;
 713                 case 'h':
 714                 case '?':
 715                         usage();
 716                 }
 717         }
 718
 719         if (optind + 1 != argc) {
 720                 fprintf(stderr, "missing path\n");
 721                 usage();
 722         }
 723
 724         if (in_fp) {
 725                 char *l = getln(line, sizeof(line), in_fp);
 726                 char *p;
 727
 728                 if (l == NULL) {
 729                         fprintf(stderr, "failed to read line from input\n");
 730                         exit(-1);
 731                 }
 732                 if (strncmp(l, "Flags: ", 7) == 0) {
 733                         l += 7;
 734                         in_manifest = 1;
 735                         parse_flags(l);
 736                 } else if ((p = strchr(l, ':'))) {
 737                         *p++ = 0;
 738                         parse_flags(l);
 739                         checksum = strdup(p);
 740                 } else {
 741                         fprintf(stderr, "invalid input file format\n");
 742                         exit(-1);
 743                 }
 744                 if (n_flags)
 745                         fprintf(stderr, "warning: "
 746                                 "command line flags ignored in -r mode\n");
 747         }
 748         strcpy(flagstring, flchar);
 749         for (i = 0; i < NUM_FLAGS; ++i) {
 750                 if (flags[i] == 0)
 751                         flagstring[i] -= 'a' - 'A';
 752         }
 753
 754         path = argv[optind];
 755         plen = strlen(path);
 756         if (path[plen - 1] == '/') {
 757                 --plen;
 758                 path[plen] = '\0';
 759         }
 760
 761         for (i = 0; i < n_excludes; ++i) {
 762                 if (strncmp(path, excludes[i].path, plen) != 0)
 763                         fprintf(stderr,
 764                                 "warning: exclude %s outside of path %s\n",
 765                                 excludes[i].path, path);
 766                 else
 767                         excludes[i].path += plen;
 768                 elen = strlen(excludes[i].path);
 769                 if (excludes[i].path[elen - 1] == '/')
 770                         --elen;
 771                 excludes[i].path[elen] = '\0';
 772                 excludes[i].len = elen;
 773         }
 774
 775         fd = open(path, O_RDONLY);
 776         if (fd == -1) {
 777                 fprintf(stderr, "failed to open %s: %s\n", path,
 778                         strerror(errno));
 779                 exit(-1);
 780         }
 781
 782         if (gen_manifest)
 783                 fprintf(out_fp, "Flags: %s\n", flagstring);
 784
 785         sum_init(&cs);
 786         sum(fd, 1, &cs, path, "");
 787         sum_fini(&cs);
 788
 789         close(fd);
 790         if (in_manifest)
 791                 check_manifest("", "", "", 1);
 792
 793         if (!checksum) {
 794                 if (in_manifest) {
 795                         fprintf(stderr, "malformed input\n");
 796                         exit(-1);
 797                 }
 798                 if (!gen_manifest)
 799                         fprintf(out_fp, "%s:", flagstring);
 800
 801                 fprintf(out_fp, "%s\n", sum_to_string(&cs));
 802         } else {
 803                 if (strcmp(checksum, sum_to_string(&cs)) == 0) {
 804                         printf("OK\n");
 805                         exit(0);
 806                 } else {
 807                         printf("FAIL\n");
 808                         exit(1);
 809                 }
 810         }
 811
 812         exit(0);
 813 }