1: #if !defined(lint) && defined(DOSCCS)
   2: static  char *sccsid = "@(#)diffdir.c	4.9 (Berkeley) 8/28/84";
   3: #endif
   4: 
   5: #include "diff.h"
   6: /*
   7:  * diff - directory comparison
   8:  */
   9: #define d_flags d_ino
  10: 
  11: #define ONLY    1       /* Only in this directory */
  12: #define SAME    2       /* Both places and same */
  13: #define DIFFER  4       /* Both places and different */
  14: #define DIRECT  8       /* Directory */
  15: 
  16: struct dir {
  17:     ino_t   d_ino;
  18:     short   d_reclen;
  19:     short   d_namlen;
  20:     char    *d_entry;
  21: };
  22: 
  23: struct  dir *setupdir();
  24: int header;
  25: char    title[2*BUFSIZ], *etitle;
  26: 
  27: diffdir(argv)
  28:     char **argv;
  29: {
  30:     register struct dir *d1, *d2;
  31:     struct dir *dir1, *dir2;
  32:     register int i;
  33:     int cmp;
  34: 
  35:     if (opt == D_IFDEF) {
  36:         fprintf(stderr, "diff: can't specify -I with directories\n");
  37:         done();
  38:     }
  39:     if (opt == D_EDIT && (sflag || lflag))
  40:         fprintf(stderr,
  41:             "diff: warning: shouldn't give -s or -l with -e\n");
  42:     title[0] = 0;
  43:     strcpy(title, "diff ");
  44:     for (i = 1; diffargv[i+2]; i++) {
  45:         if (!strcmp(diffargv[i], "-"))
  46:             continue;   /* was -S, dont look silly */
  47:         strcat(title, diffargv[i]);
  48:         strcat(title, " ");
  49:     }
  50:     for (etitle = title; *etitle; etitle++)
  51:         ;
  52:     setfile(&file1, &efile1, file1);
  53:     setfile(&file2, &efile2, file2);
  54:     argv[0] = file1;
  55:     argv[1] = file2;
  56:     dir1 = setupdir(file1);
  57:     dir2 = setupdir(file2);
  58:     d1 = dir1; d2 = dir2;
  59:     while (d1->d_entry != 0 || d2->d_entry != 0) {
  60:         if (d1->d_entry && useless(d1->d_entry)) {
  61:             d1++;
  62:             continue;
  63:         }
  64:         if (d2->d_entry && useless(d2->d_entry)) {
  65:             d2++;
  66:             continue;
  67:         }
  68:         if (d1->d_entry == 0)
  69:             cmp = 1;
  70:         else if (d2->d_entry == 0)
  71:             cmp = -1;
  72:         else
  73:             cmp = strcmp(d1->d_entry, d2->d_entry);
  74:         if (cmp < 0) {
  75:             if (lflag)
  76:                 d1->d_flags |= ONLY;
  77:             else if (opt == 0 || opt == 2)
  78:                 only(d1, 1);
  79:             d1++;
  80:         } else if (cmp == 0) {
  81:             compare(d1);
  82:             d1++;
  83:             d2++;
  84:         } else {
  85:             if (lflag)
  86:                 d2->d_flags |= ONLY;
  87:             else if (opt == 0 || opt == 2)
  88:                 only(d2, 2);
  89:             d2++;
  90:         }
  91:     }
  92:     if (lflag) {
  93:         scanpr(dir1, ONLY, "Only in %.*s", file1, efile1, 0, 0);
  94:         scanpr(dir2, ONLY, "Only in %.*s", file2, efile2, 0, 0);
  95:         scanpr(dir1, SAME, "Common identical files in %.*s and %.*s",
  96:             file1, efile1, file2, efile2);
  97:         scanpr(dir1, DIFFER, "Binary files which differ in %.*s and %.*s",
  98:             file1, efile1, file2, efile2);
  99:         scanpr(dir1, DIRECT, "Common subdirectories of %.*s and %.*s",
 100:             file1, efile1, file2, efile2);
 101:     }
 102:     if (rflag) {
 103:         if (header && lflag)
 104:             printf("\f");
 105:         for (d1 = dir1; d1->d_entry; d1++)  {
 106:             if ((d1->d_flags & DIRECT) == 0)
 107:                 continue;
 108:             strcpy(efile1, d1->d_entry);
 109:             strcpy(efile2, d1->d_entry);
 110:             calldiff(0);
 111:         }
 112:     }
 113: }
 114: 
 115: setfile(fpp, epp, file)
 116:     char **fpp, **epp;
 117:     char *file;
 118: {
 119:     register char *cp;
 120: 
 121:     *fpp = malloc(BUFSIZ);
 122:     if (*fpp == 0) {
 123:         fprintf(stderr, "diff: ran out of memory\n");
 124:         exit(1);
 125:     }
 126:     strcpy(*fpp, file);
 127:     for (cp = *fpp; *cp; cp++)
 128:         continue;
 129:     *cp++ = '/';
 130:     *epp = cp;
 131: }
 132: 
 133: scanpr(dp, test, title, file1, efile1, file2, efile2)
 134:     register struct dir *dp;
 135:     int test;
 136:     char *title, *file1, *efile1, *file2, *efile2;
 137: {
 138:     int titled = 0;
 139: 
 140:     for (; dp->d_entry; dp++) {
 141:         if ((dp->d_flags & test) == 0)
 142:             continue;
 143:         if (titled == 0) {
 144:             if (header == 0)
 145:                 header = 1;
 146:             else
 147:                 printf("\n");
 148:             printf(title,
 149:                 efile1 - file1 - 1, file1,
 150:                 efile2 - file2 - 1, file2);
 151:             printf(":\n");
 152:             titled = 1;
 153:         }
 154:         printf("\t%s\n", dp->d_entry);
 155:     }
 156: }
 157: 
 158: only(dp, which)
 159:     struct dir *dp;
 160:     int which;
 161: {
 162:     char *file = which == 1 ? file1 : file2;
 163:     char *efile = which == 1 ? efile1 : efile2;
 164: 
 165:     printf("Only in %.*s: %s\n", efile - file - 1, file, dp->d_entry);
 166: }
 167: 
 168: int entcmp();
 169: 
 170: struct dir *
 171: setupdir(cp)
 172:     char *cp;
 173: {
 174:     register struct dir *dp = 0, *ep;
 175:     register struct direct *rp;
 176:     register int nitems, n;
 177:     DIR *dirp;
 178: 
 179:     dirp = opendir(cp);
 180:     if (dirp == NULL) {
 181:         fprintf(stderr, "diff: ");
 182:         perror(cp);
 183:         done();
 184:     }
 185:     nitems = 0;
 186: #ifdef  pdp11
 187:     while (readdir(dirp))
 188:         nitems++;
 189:     rewinddir(dirp);
 190:     dp = (struct dir *)calloc(nitems+1, sizeof (struct dir));
 191:     nitems = 0;
 192: #else
 193:     dp = (struct dir *)malloc(sizeof (struct dir));
 194: #endif
 195:     if (dp == 0) {
 196:         fprintf(stderr, "diff: ran out of memory\n");
 197:         done();
 198:     }
 199:     while (rp = readdir(dirp)) {
 200:         ep = &dp[nitems++];
 201:         ep->d_reclen = rp->d_reclen;
 202:         ep->d_namlen = rp->d_namlen;
 203:         ep->d_entry = 0;
 204:         ep->d_flags = 0;
 205:         if (ep->d_namlen > 0) {
 206:             ep->d_entry = malloc(ep->d_namlen + 1);
 207:             if (ep->d_entry == 0) {
 208:                 fprintf(stderr, "diff: out of memory\n");
 209:                 done();
 210:             }
 211:             strcpy(ep->d_entry, rp->d_name);
 212:         }
 213: #ifndef pdp11
 214:         dp = (struct dir *)realloc((char *)dp,
 215:             (nitems + 1) * sizeof (struct dir));
 216:         if (dp == 0) {
 217:             fprintf(stderr, "diff: ran out of memory\n");
 218:             done();
 219:         }
 220: #endif
 221:     }
 222:     dp[nitems].d_entry = 0;     /* delimiter */
 223:     closedir(dirp);
 224:     qsort(dp, nitems, sizeof (struct dir), entcmp);
 225:     return (dp);
 226: }
 227: 
 228: entcmp(d1, d2)
 229:     struct dir *d1, *d2;
 230: {
 231:     return (strcmp(d1->d_entry, d2->d_entry));
 232: }
 233: 
 234: compare(dp)
 235:     register struct dir *dp;
 236: {
 237:     register int i, j;
 238:     int f1, f2, fmt1, fmt2;
 239:     struct stat stb1, stb2;
 240:     int flag = 0;
 241:     char buf1[BUFSIZ], buf2[BUFSIZ];
 242: 
 243:     strcpy(efile1, dp->d_entry);
 244:     strcpy(efile2, dp->d_entry);
 245:     f1 = open(file1, 0);
 246:     if (f1 < 0) {
 247:         perror(file1);
 248:         return;
 249:     }
 250:     f2 = open(file2, 0);
 251:     if (f2 < 0) {
 252:         perror(file2);
 253:         close(f1);
 254:         return;
 255:     }
 256:     fstat(f1, &stb1); fstat(f2, &stb2);
 257:     fmt1 = stb1.st_mode & S_IFMT;
 258:     fmt2 = stb2.st_mode & S_IFMT;
 259:     if (fmt1 != S_IFREG || fmt2 != S_IFREG) {
 260:         if (fmt1 == fmt2) {
 261:             if (fmt1 != S_IFDIR && stb1.st_rdev == stb2.st_rdev)
 262:                 goto same;
 263:             if (fmt1 == S_IFDIR) {
 264:                 dp->d_flags = DIRECT;
 265:                 if (lflag || opt == D_EDIT)
 266:                     goto closem;
 267:                 printf("Common subdirectories: %s and %s\n",
 268:                     file1, file2);
 269:                 goto closem;
 270:             }
 271:         }
 272:         goto notsame;
 273:     }
 274:     if (stb1.st_size != stb2.st_size)
 275:         goto notsame;
 276:     for (;;) {
 277:         i = read(f1, buf1, BUFSIZ);
 278:         j = read(f2, buf2, BUFSIZ);
 279:         if (i < 0 || j < 0 || i != j)
 280:             goto notsame;
 281:         if (i == 0 && j == 0)
 282:             goto same;
 283:         for (j = 0; j < i; j++)
 284:             if (buf1[j] != buf2[j])
 285:                 goto notsame;
 286:     }
 287: same:
 288:     if (sflag == 0)
 289:         goto closem;
 290:     if (lflag)
 291:         dp->d_flags = SAME;
 292:     else
 293:         printf("Files %s and %s are identical\n", file1, file2);
 294:     goto closem;
 295: notsame:
 296:     if (!ascii(f1) || !ascii(f2)) {
 297:         if (lflag)
 298:             dp->d_flags |= DIFFER;
 299:         else if (opt == D_NORMAL || opt == D_CONTEXT)
 300:             printf("Binary files %s and %s differ\n",
 301:                 file1, file2);
 302:         goto closem;
 303:     }
 304:     close(f1); close(f2);
 305:     anychange = 1;
 306:     if (lflag)
 307:         calldiff(title);
 308:     else {
 309:         if (opt == D_EDIT) {
 310:             printf("ed - %s << '-*-END-*-'\n", dp->d_entry);
 311:             calldiff(0);
 312:         } else {
 313:             printf("%s%s %s\n", title, file1, file2);
 314:             calldiff(0);
 315:         }
 316:         if (opt == D_EDIT)
 317:             printf("w\nq\n-*-END-*-\n");
 318:     }
 319:     return;
 320: closem:
 321:     close(f1); close(f2);
 322: }
 323: 
 324: char    *prargs[] = { "pr", "-h", 0, "-f", 0, 0 };
 325: 
 326: calldiff(wantpr)
 327:     char *wantpr;
 328: {
 329:     int pid, status, status2, pv[2];
 330: 
 331:     prargs[2] = wantpr;
 332:     fflush(stdout);
 333:     if (wantpr) {
 334:         sprintf(etitle, "%s %s", file1, file2);
 335:         pipe(pv);
 336:         pid = fork();
 337:         if (pid == -1) {
 338:             fprintf(stderr, "No more processes");
 339:             done();
 340:         }
 341:         if (pid == 0) {
 342:             close(0);
 343:             dup(pv[0]);
 344:             close(pv[0]);
 345:             close(pv[1]);
 346:             execv(pr+4, prargs);
 347:             execv(pr, prargs);
 348:             perror(pr);
 349:             done();
 350:         }
 351:     }
 352:     pid = fork();
 353:     if (pid == -1) {
 354:         fprintf(stderr, "diff: No more processes\n");
 355:         done();
 356:     }
 357:     if (pid == 0) {
 358:         if (wantpr) {
 359:             close(1);
 360:             dup(pv[1]);
 361:             close(pv[0]);
 362:             close(pv[1]);
 363:         }
 364:         execv(diff+4, diffargv);
 365:         execv(diff, diffargv);
 366:         perror(diff);
 367:         done();
 368:     }
 369:     if (wantpr) {
 370:         close(pv[0]);
 371:         close(pv[1]);
 372:     }
 373:     while (wait(&status) != pid)
 374:         continue;
 375:     while (wait(&status2) != -1)
 376:         continue;
 377: /*
 378: 	if ((status >> 8) >= 2)
 379: 		done();
 380: */
 381: }
 382: 
 383: #include <a.out.h>
 384: 
 385: ascii(f)
 386:     int f;
 387: {
 388:     char buf[BUFSIZ];
 389:     register int cnt;
 390:     register char *cp;
 391: 
 392:     lseek(f, (long)0, 0);
 393:     cnt = read(f, buf, BUFSIZ);
 394:     if (cnt >= sizeof (struct exec)) {
 395:         struct exec hdr;
 396:         hdr = *(struct exec *)buf;
 397:         if (!N_BADMAG(hdr))
 398:             return (0);
 399:     }
 400:     cp = buf;
 401:     while (--cnt >= 0)
 402:         if (*cp++ & 0200)
 403:             return (0);
 404:     return (1);
 405: }
 406: 
 407: /*
 408:  * THIS IS CRUDE.
 409:  */
 410: useless(cp)
 411: register char *cp;
 412: {
 413: 
 414:     if (cp[0] == '.') {
 415:         if (cp[1] == '\0')
 416:             return (1); /* directory "." */
 417:         if (cp[1] == '.' && cp[2] == '\0')
 418:             return (1); /* directory ".." */
 419:     }
 420:     if (start && strcmp(start, cp) > 0)
 421:         return (1);
 422:     return (0);
 423: }

Defined functions

ascii defined in line 385; used 2 times
  • in line 296(2)
calldiff defined in line 326; used 4 times
compare defined in line 234; used 1 times
  • in line 81
diffdir defined in line 27; used 1 times
entcmp defined in line 228; used 2 times
only defined in line 158; used 2 times
scanpr defined in line 133; used 5 times
setfile defined in line 115; used 2 times
setupdir defined in line 170; used 3 times
useless defined in line 410; used 2 times

Defined variables

etitle defined in line 25; used 4 times
header defined in line 24; used 3 times
prargs defined in line 324; used 3 times
sccsid defined in line 2; never used
title defined in line 25; used 10 times

Defined struct's

dir defined in line 16; used 32 times

Defined macros

DIFFER defined in line 13; used 2 times
DIRECT defined in line 14; used 3 times
ONLY defined in line 11; used 4 times
SAME defined in line 12; used 2 times
d_flags defined in line 9; used 8 times
Last modified: 1991-11-12
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