Annotation of src/usr.bin/compress/main.c, Revision 1.60
1.60 ! deraadt 1: /* $OpenBSD: main.c,v 1.59 2005/02/24 09:44:36 moritz Exp $ */
1.1 mickey 2:
1.52 henning 3: #ifndef SMALL
1.18 mickey 4: static const char copyright[] =
5: "@(#) Copyright (c) 1992, 1993\n\
6: The Regents of the University of California. All rights reserved.\n"
7: "Copyright (c) 1997-2002 Michael Shalayeff\n";
1.52 henning 8: #endif
1.1 mickey 9:
1.45 tedu 10: #ifndef SMALL
1.18 mickey 11: static const char license[] =
12: "\n"
13: " Redistribution and use in source and binary forms, with or without\n"
14: " modification, are permitted provided that the following conditions\n"
15: " are met:\n"
16: " 1. Redistributions of source code must retain the above copyright\n"
17: " notice, this list of conditions and the following disclaimer.\n"
18: " 2. Redistributions in binary form must reproduce the above copyright\n"
19: " notice, this list of conditions and the following disclaimer in the\n"
20: " documentation and/or other materials provided with the distribution.\n"
1.23 deraadt 21: " 3. Neither the name of the University nor the names of its contributors\n"
22: " may be used to endorse or promote products derived from this software\n"
23: " without specific prior written permission.\n"
1.18 mickey 24: "\n"
25: " THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR\n"
26: " IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES\n"
27: " OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.\n"
28: " IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,\n"
29: " INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES\n"
30: " (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR\n"
31: " SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)\n"
32: " HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,\n"
33: " STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING\n"
34: " IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF\n"
35: " THE POSSIBILITY OF SUCH DAMAGE.\n";
1.45 tedu 36: #endif /* SMALL */
1.1 mickey 37:
1.50 henning 38: #ifndef SMALL
1.60 ! deraadt 39: static const char main_rcsid[] = "$OpenBSD: main.c,v 1.59 2005/02/24 09:44:36 moritz Exp $";
1.1 mickey 40: #endif
41:
42: #include <sys/param.h>
43: #include <sys/time.h>
44: #include <sys/stat.h>
45:
1.18 mickey 46: #include <getopt.h>
1.1 mickey 47: #include <err.h>
48: #include <errno.h>
1.19 millert 49: #include <fts.h>
1.37 millert 50: #include <libgen.h>
1.1 mickey 51: #include <stdio.h>
52: #include <stdlib.h>
53: #include <string.h>
54: #include <unistd.h>
55: #include <fcntl.h>
56: #include <paths.h>
57: #include "compress.h"
58:
59: #define min(a,b) ((a) < (b)? (a) : (b))
60:
1.18 mickey 61: int pipin, force, verbose, testmode, list, nosave;
62: int savename, recurse;
1.37 millert 63: int cat, decomp;
1.1 mickey 64: extern char *__progname;
65:
1.18 mickey 66: const struct compressor {
1.1 mickey 67: char *name;
68: char *suffix;
1.33 millert 69: u_char *magic;
1.37 millert 70: void *(*open)(int, const char *, char *, int, u_int32_t, int);
1.17 millert 71: int (*read)(void *, char *, int);
72: int (*write)(void *, const char *, int);
1.37 millert 73: int (*close)(void *, struct z_info *);
1.1 mickey 74: } c_table[] = {
1.45 tedu 75: #define M_DEFLATE (&c_table[0])
76: { "deflate", ".gz", "\037\213", gz_open, gz_read, gz_write, gz_close },
77: #define M_COMPRESS (&c_table[1])
78: #ifndef SMALL
1.37 millert 79: { "compress", ".Z", "\037\235", z_open, zread, zwrite, z_close },
1.45 tedu 80: #endif /* SMALL */
1.18 mickey 81: #if 0
82: #define M_LZH (&c_table[2])
1.33 millert 83: { "lzh", ".lzh", "\037\240", lzh_open, lzh_read, lzh_write, lzh_close },
1.18 mickey 84: #define M_ZIP (&c_table[3])
1.33 millert 85: { "zip", ".zip", "PK", zip_open, zip_read, zip_write, zip_close },
1.18 mickey 86: #define M_PACK (&c_table[4])
1.33 millert 87: { "pack", ".pak", "\037\036", pak_open, pak_read, pak_write, pak_close },
1.18 mickey 88: #endif
1.1 mickey 89: { NULL }
90: };
91:
1.45 tedu 92: #ifndef SMALL
93: const struct compressor null_method =
94: { "null", ".nul", "XX", null_open, null_read, null_write, null_close };
95: #endif /* SMALL */
96:
1.18 mickey 97: int permission(const char *);
1.60 ! deraadt 98: void setfile(const char *, int, struct stat *);
1.31 millert 99: __dead void usage(int);
1.49 henning 100: int docompress(const char *, char *, const struct compressor *,
1.25 deraadt 101: int, struct stat *);
1.49 henning 102: int dodecompress(const char *, char *, const struct compressor *,
1.25 deraadt 103: int, struct stat *);
1.37 millert 104: const struct compressor *check_method(int);
1.36 millert 105: const char *check_suffix(const char *);
106: char *set_outfile(const char *, char *, size_t);
1.37 millert 107: void list_stats(const char *, const struct compressor *, struct z_info *);
108: void verbose_info(const char *, off_t, off_t, u_int32_t);
1.18 mickey 109:
1.19 millert 110: #define OPTSTRING "123456789ab:cdfghlLnNOo:qrS:tvV"
1.18 mickey 111: const struct option longopts[] = {
1.45 tedu 112: #ifndef SMALL
1.18 mickey 113: { "ascii", no_argument, 0, 'a' },
114: { "stdout", no_argument, 0, 'c' },
115: { "to-stdout", no_argument, 0, 'c' },
116: { "decompress", no_argument, 0, 'd' },
117: { "uncompress", no_argument, 0, 'd' },
118: { "force", no_argument, 0, 'f' },
119: { "help", no_argument, 0, 'h' },
120: { "list", no_argument, 0, 'l' },
121: { "license", no_argument, 0, 'L' },
122: { "no-name", no_argument, 0, 'n' },
123: { "name", no_argument, 0, 'N' },
124: { "quiet", no_argument, 0, 'q' },
125: { "recursive", no_argument, 0, 'r' },
126: { "suffix", required_argument, 0, 'S' },
127: { "test", no_argument, 0, 't' },
128: { "verbose", no_argument, 0, 'v' },
129: { "version", no_argument, 0, 'V' },
130: { "fast", no_argument, 0, '1' },
131: { "best", no_argument, 0, '9' },
1.45 tedu 132: #endif /* SMALL */
1.18 mickey 133: { NULL }
134: };
1.1 mickey 135:
136: int
1.24 deraadt 137: main(int argc, char *argv[])
1.1 mickey 138: {
1.19 millert 139: FTS *ftsp;
140: FTSENT *entry;
141: struct stat osb;
1.18 mickey 142: const struct compressor *method;
1.36 millert 143: const char *s;
144: char *p, *infile;
1.19 millert 145: char outfile[MAXPATHLEN], _infile[MAXPATHLEN], suffix[16];
1.18 mickey 146: char *nargv[512]; /* some estimate based on ARG_MAX */
1.37 millert 147: int bits, exists, oreg, ch, error, i, rc, oflag;
1.1 mickey 148:
1.55 millert 149: oreg = exists = bits = oflag = 0;
1.38 millert 150: nosave = -1;
1.1 mickey 151: p = __progname;
152: if (p[0] == 'g') {
153: method = M_DEFLATE;
1.18 mickey 154: bits = 6;
1.1 mickey 155: p++;
156: } else
1.45 tedu 157: #ifdef SMALL
158: method = M_DEFLATE;
159: #else
1.1 mickey 160: method = M_COMPRESS;
1.45 tedu 161: #endif /* SMALL */
1.1 mickey 162:
163: decomp = 0;
164: if (!strcmp(p, "zcat")) {
165: decomp++;
1.20 mickey 166: cat = 1;
1.1 mickey 167: } else {
168: if (p[0] == 'u' && p[1] == 'n') {
169: p += 2;
170: decomp++;
171: }
172:
1.2 mickey 173: if (strcmp(p, "zip") &&
174: strcmp(p, "compress"))
1.1 mickey 175: errx(1, "unknown program name");
176: }
177:
1.18 mickey 178: strlcpy(suffix, method->suffix, sizeof(suffix));
179:
1.19 millert 180: nargv[0] = NULL;
1.36 millert 181: if ((p = getenv("GZIP")) != NULL) {
1.18 mickey 182: char *last;
183:
184: nargv[0] = *argv++;
1.36 millert 185: for (i = 1, (p = strtok_r(p, " ", &last)); p != NULL;
1.18 mickey 186: (p = strtok_r(NULL, " ", &last)), i++)
187: if (i < sizeof(nargv)/sizeof(nargv[1]) - argc - 1)
188: nargv[i] = p;
189: else {
190: errx(1, "GZIP is too long");
191: }
192: argc += i - 1;
193: while ((nargv[i++] = *argv++))
194: ;
195: argv = nargv;
196: }
197:
198: while ((ch = getopt_long(argc, argv, OPTSTRING, longopts, NULL)) != -1)
1.1 mickey 199: switch(ch) {
200: case '1':
201: case '2':
202: case '3':
203: case '4':
204: case '5':
205: case '6':
206: case '7':
207: case '8':
208: case '9':
209: method = M_DEFLATE;
1.18 mickey 210: strlcpy(suffix, method->suffix, sizeof(suffix));
1.1 mickey 211: bits = ch - '0';
212: break;
1.18 mickey 213: case 'a':
214: warnx("option -a is ignored on this system");
215: break;
1.1 mickey 216: case 'b':
217: bits = strtol(optarg, &p, 10);
1.7 denny 218: /*
219: * POSIX 1002.3 says 9 <= bits <= 14 for portable
220: * apps, but says the implementation may allow
221: * greater.
222: */
1.1 mickey 223: if (*p)
224: errx(1, "illegal bit count -- %s", optarg);
225: break;
226: case 'c':
1.20 mickey 227: cat = 1;
1.1 mickey 228: break;
229: case 'd': /* Backward compatible. */
230: decomp++;
231: break;
232: case 'f':
233: force++;
234: break;
235: case 'g':
236: method = M_DEFLATE;
1.18 mickey 237: strlcpy(suffix, method->suffix, sizeof(suffix));
238: bits = 6;
1.1 mickey 239: break;
240: case 'l':
241: list++;
1.37 millert 242: testmode++;
243: decomp++;
1.1 mickey 244: break;
245: case 'n':
1.37 millert 246: nosave = 1;
1.1 mickey 247: break;
248: case 'N':
1.38 millert 249: nosave = 0;
1.1 mickey 250: break;
1.45 tedu 251: #ifndef SMALL
1.1 mickey 252: case 'O':
253: method = M_COMPRESS;
1.18 mickey 254: strlcpy(suffix, method->suffix, sizeof(suffix));
1.1 mickey 255: break;
1.45 tedu 256: #endif /* SMALL */
1.1 mickey 257: case 'o':
1.18 mickey 258: if (strlcpy(outfile, optarg,
259: sizeof(outfile)) >= sizeof(outfile))
260: errx(1, "-o argument is too long");
1.20 mickey 261: oflag = 1;
1.1 mickey 262: break;
263: case 'q':
264: verbose = -1;
265: break;
266: case 'S':
267: p = suffix;
268: if (optarg[0] != '.')
269: *p++ = '.';
1.18 mickey 270: strlcpy(p, optarg, sizeof(suffix) - (p - suffix));
271: p = optarg;
1.1 mickey 272: break;
273: case 't':
1.20 mickey 274: testmode = 1;
1.29 millert 275: decomp++;
1.1 mickey 276: break;
1.51 henning 277: #ifndef SMALL
1.18 mickey 278: case 'V':
1.48 millert 279: printf("%s\n%s\n", main_rcsid, gz_rcsid);
280: printf("%s\n%s\n", z_rcsid, null_rcsid);
1.45 tedu 281: #endif
1.19 millert 282: exit (0);
1.1 mickey 283: case 'v':
284: verbose++;
285: break;
1.52 henning 286: #ifndef SMALL
1.18 mickey 287: case 'L':
288: fputs(copyright, stderr);
289: fputs(license, stderr);
1.45 tedu 290: #endif
1.19 millert 291: exit (0);
1.18 mickey 292: case 'r':
1.19 millert 293: recurse++;
1.18 mickey 294: break;
295:
1.1 mickey 296: case 'h':
1.31 millert 297: usage(0);
298: break;
1.1 mickey 299: default:
1.31 millert 300: usage(1);
1.1 mickey 301: }
302: argc -= optind;
303: argv += optind;
304:
1.19 millert 305: if (argc == 0) {
306: if (nargv[0] == NULL)
307: argv = nargv;
308: /* XXX - make sure we don't oflow nargv in $GZIP case (millert) */
309: argv[0] = "/dev/stdin";
310: argv[1] = NULL;
311: pipin++;
1.39 millert 312: if (!oflag)
313: cat = 1;
1.28 millert 314: } else {
315: for (i = 0; i < argc; i++) {
316: if (argv[i][0] == '-' && argv[i][1] == '\0') {
317: argv[i] = "/dev/stdin";
318: pipin++;
319: cat = 1;
320: }
321: }
1.19 millert 322: }
323: if (oflag && (recurse || argc > 1))
324: errx(1, "-o option may only be used with a single input file");
1.20 mickey 325:
1.34 mickey 326: if ((cat && argc) + testmode + oflag > 1)
1.19 millert 327: errx(1, "may not mix -o, -c, or -t options");
1.38 millert 328: if (nosave == -1)
329: nosave = decomp;
1.19 millert 330:
331: if ((ftsp = fts_open(argv, FTS_PHYSICAL|FTS_NOCHDIR, 0)) == NULL)
332: err(1, NULL);
1.37 millert 333: for (rc = SUCCESS; (entry = fts_read(ftsp)) != NULL;) {
1.19 millert 334: infile = entry->fts_path;
335: switch (entry->fts_info) {
336: case FTS_D:
337: if (!recurse) {
338: warnx("%s is a directory: ignored",
339: infile);
340: fts_set(ftsp, entry, FTS_SKIP);
341: }
342: continue;
343: case FTS_DP:
344: continue;
345: case FTS_NS:
346: /*
347: * If file does not exist and has no suffix,
348: * tack on the default suffix and try that.
349: */
350: /* XXX - is overwriting fts_statp legal? (millert) */
351: if (entry->fts_errno == ENOENT &&
1.56 millert 352: ((p = strrchr(entry->fts_accpath, '.')) == NULL ||
353: strcmp(p, suffix) != 0) &&
1.19 millert 354: snprintf(_infile, sizeof(_infile), "%s%s", infile,
355: suffix) < sizeof(_infile) &&
356: stat(_infile, entry->fts_statp) == 0 &&
357: S_ISREG(entry->fts_statp->st_mode)) {
358: infile = _infile;
359: break;
360: }
361: case FTS_ERR:
362: case FTS_DNR:
363: warnx("%s: %s", infile, strerror(entry->fts_errno));
1.37 millert 364: rc = rc ? rc : WARNING;
1.19 millert 365: continue;
366: default:
1.47 henning 367: if (!S_ISREG(entry->fts_statp->st_mode) && !pipin &&
368: !(S_ISLNK(entry->fts_statp->st_mode) && cat)) {
1.27 millert 369: warnx("%s not a regular file%s",
1.28 millert 370: infile, cat ? "" : ": unchanged");
1.37 millert 371: rc = rc ? rc : WARNING;
1.19 millert 372: continue;
1.18 mickey 373: }
1.19 millert 374: break;
1.9 mickey 375: }
1.1 mickey 376:
1.36 millert 377: if (!decomp && !pipin && (s = check_suffix(infile)) != NULL) {
378: warnx("%s already has %s suffix -- unchanged",
379: infile, s);
1.37 millert 380: rc = rc ? rc : WARNING;
1.36 millert 381: continue;
382: }
383:
1.37 millert 384: if (cat)
1.22 deraadt 385: strlcpy(outfile, "/dev/stdout", sizeof outfile);
1.58 otto 386: else if (!oflag) {
1.19 millert 387: if (decomp) {
1.35 millert 388: if (set_outfile(infile, outfile,
389: sizeof outfile) == NULL) {
1.53 millert 390: if (!recurse) {
1.19 millert 391: warnx("%s: unknown suffix: "
392: "ignored", infile);
1.53 millert 393: rc = rc ? rc : WARNING;
394: }
1.19 millert 395: continue;
396: }
397: } else {
398: if (snprintf(outfile, sizeof(outfile),
399: "%s%s", infile, suffix) >= sizeof(outfile)) {
400: warnx("%s%s: name too long",
401: infile, suffix);
1.53 millert 402: rc = rc ? rc : WARNING;
1.19 millert 403: continue;
404: }
405: }
1.1 mickey 406: }
407:
1.55 millert 408: if (!testmode) {
1.54 markus 409: exists = !stat(outfile, &osb);
1.55 millert 410: if (!force && exists && S_ISREG(osb.st_mode) &&
411: !permission(outfile)) {
412: rc = rc ? rc : WARNING;
413: continue;
414: }
415: oreg = !exists || S_ISREG(osb.st_mode);
1.37 millert 416: }
1.1 mickey 417:
1.37 millert 418: if (verbose > 0 && !pipin && !list)
1.1 mickey 419: fprintf(stderr, "%s:\t", infile);
420:
1.49 henning 421: error = (decomp ? dodecompress : docompress)
1.60 ! deraadt 422: (infile, outfile, method, bits, entry->fts_statp);
1.1 mickey 423:
1.37 millert 424: switch (error) {
425: case SUCCESS:
426: if (!cat && !testmode) {
427: if (!pipin && unlink(infile) && verbose >= 0)
1.18 mickey 428: warn("input: %s", infile);
1.1 mickey 429: }
1.37 millert 430: break;
431: case WARNING:
432: rc = rc ? rc : WARNING;
433: break;
434: default:
435: rc = FAILURE;
436: if (oreg && unlink(outfile) && errno != ENOENT &&
437: verbose >= 0) {
438: if (force)
439: warn("output: %s", outfile);
440: else
441: err(1, "output: %s", outfile);
442: }
443: break;
1.1 mickey 444: }
1.19 millert 445: }
1.37 millert 446: if (list)
447: list_stats(NULL, NULL, NULL);
1.1 mickey 448:
1.18 mickey 449: exit(rc);
1.1 mickey 450: }
451:
452: int
1.49 henning 453: docompress(const char *in, char *out, const struct compressor *method,
1.24 deraadt 454: int bits, struct stat *sb)
1.1 mickey 455: {
1.59 moritz 456: #ifndef SMALL
1.18 mickey 457: u_char buf[Z_BUFSIZE];
1.37 millert 458: char *name;
459: int error, ifd, ofd, flags;
1.16 mpech 460: void *cookie;
461: ssize_t nr;
1.37 millert 462: u_int32_t mtime;
463: struct z_info info;
1.1 mickey 464:
1.37 millert 465: mtime = 0;
466: flags = 0;
467: error = SUCCESS;
468: name = NULL;
1.1 mickey 469: cookie = NULL;
1.3 mickey 470:
1.21 millert 471: if ((ifd = open(in, O_RDONLY)) < 0) {
472: if (verbose >= 0)
473: warn("%s", out);
1.37 millert 474: return (FAILURE);
1.21 millert 475: }
476:
1.3 mickey 477: if ((ofd = open(out, O_WRONLY|O_CREAT, S_IWUSR)) < 0) {
478: if (verbose >= 0)
479: warn("%s", out);
1.32 mickey 480: (void) close(ifd);
1.37 millert 481: return (FAILURE);
1.3 mickey 482: }
483:
1.4 mickey 484: if (method != M_COMPRESS && !force && isatty(ofd)) {
1.3 mickey 485: if (verbose >= 0)
486: warnx("%s: won't write compressed data to terminal",
1.25 deraadt 487: out);
1.32 mickey 488: (void) close(ofd);
489: (void) close(ifd);
1.37 millert 490: return (FAILURE);
1.3 mickey 491: }
1.1 mickey 492:
1.38 millert 493: if (!pipin && !nosave) {
1.37 millert 494: name = basename(in);
495: mtime = (u_int32_t)sb->st_mtime;
496: }
497: if ((cookie = (*method->open)(ofd, "w", name, bits, mtime, flags)) == NULL) {
1.32 mickey 498: if (verbose >= 0)
499: warn("%s", in);
500: (void) close(ofd);
501: (void) close(ifd);
1.37 millert 502: return (FAILURE);
1.32 mickey 503: }
1.1 mickey 504:
1.32 mickey 505: while ((nr = read(ifd, buf, sizeof(buf))) > 0)
506: if ((method->write)(cookie, buf, nr) != nr) {
507: if (verbose >= 0)
508: warn("%s", out);
1.37 millert 509: error = FAILURE;
1.32 mickey 510: break;
511: }
1.1 mickey 512:
1.32 mickey 513: if (!error && nr < 0) {
514: if (verbose >= 0)
1.1 mickey 515: warn("%s", in);
1.37 millert 516: error = FAILURE;
1.1 mickey 517: }
518:
1.60 ! deraadt 519: if (error == SUCCESS)
! 520: setfile(out, ofd, sb);
! 521:
1.37 millert 522: if ((method->close)(cookie, &info)) {
1.1 mickey 523: if (!error && verbose >= 0)
524: warn("%s", out);
1.37 millert 525: error = FAILURE;
1.1 mickey 526: }
527:
1.18 mickey 528: if (close(ifd)) {
529: if (!error && verbose >= 0)
1.32 mickey 530: warn("%s", in);
1.37 millert 531: error = FAILURE;
1.18 mickey 532: }
1.37 millert 533:
534: if (!force && info.total_out >= info.total_in) {
535: if (verbose > 0)
536: fprintf(stderr, "file would grow; left unmodified\n");
1.41 millert 537: error = FAILURE;
1.37 millert 538: }
539:
540: if (!error && verbose > 0)
541: verbose_info(out, info.total_out, info.total_in, info.hlen);
1.44 deraadt 542:
1.21 millert 543: return (error);
1.59 moritz 544: #else
545: warnx("compression not supported");
546: return (FAILURE);
547: #endif
1.1 mickey 548: }
549:
1.18 mickey 550: const struct compressor *
1.37 millert 551: check_method(int fd)
1.1 mickey 552: {
1.18 mickey 553: const struct compressor *method;
1.33 millert 554: u_char magic[2];
1.1 mickey 555:
1.33 millert 556: if (read(fd, magic, sizeof(magic)) != 2)
557: return (NULL);
558: for (method = &c_table[0]; method->name != NULL; method++) {
559: if (magic[0] == method->magic[0] &&
560: magic[1] == method->magic[1])
561: return (method);
562: }
1.45 tedu 563: #ifndef SMALL
564: if (force && cat) {
565: null_magic[0] = magic[0];
566: null_magic[1] = magic[1];
567: return (&null_method);
568: }
569: #endif /* SMALL */
1.33 millert 570: return (NULL);
1.1 mickey 571: }
572:
573: int
1.49 henning 574: dodecompress(const char *in, char *out, const struct compressor *method,
1.24 deraadt 575: int bits, struct stat *sb)
1.1 mickey 576: {
1.18 mickey 577: u_char buf[Z_BUFSIZE];
578: int error, ifd, ofd;
1.16 mpech 579: void *cookie;
580: ssize_t nr;
1.37 millert 581: struct z_info info;
1.1 mickey 582:
1.37 millert 583: error = SUCCESS;
1.1 mickey 584: cookie = NULL;
585:
1.3 mickey 586: if ((ifd = open(in, O_RDONLY)) < 0) {
587: if (verbose >= 0)
588: warn("%s", in);
589: return -1;
590: }
591:
592: if (!force && isatty(ifd)) {
593: if (verbose >= 0)
594: warnx("%s: won't read compressed data from terminal",
1.25 deraadt 595: in);
1.3 mickey 596: close (ifd);
597: return -1;
598: }
599:
1.37 millert 600: if ((method = check_method(ifd)) == NULL) {
1.3 mickey 601: if (verbose >= 0)
602: warnx("%s: unrecognized file format", in);
1.13 d 603: close (ifd);
1.3 mickey 604: return -1;
605: }
606:
1.37 millert 607: /* XXX - open constrains outfile to MAXPATHLEN so this is safe */
1.38 millert 608: if ((cookie = (*method->open)(ifd, "r", nosave ? NULL : out,
1.37 millert 609: bits, 0, 1)) == NULL) {
1.32 mickey 610: if (verbose >= 0)
611: warn("%s", in);
612: close (ifd);
1.37 millert 613: return (FAILURE);
1.32 mickey 614: }
615:
1.37 millert 616: if (testmode)
617: ofd = -1;
618: else if ((ofd = open(out, O_WRONLY|O_CREAT|O_TRUNC, S_IWUSR)) < 0) {
1.32 mickey 619: if (verbose >= 0)
620: warn("%s", in);
1.37 millert 621: (method->close)(cookie, NULL);
622: return (FAILURE);
1.32 mickey 623: }
624:
1.37 millert 625: while ((nr = (method->read)(cookie, buf, sizeof(buf))) > 0) {
626: if (ofd != -1 && write(ofd, buf, nr) != nr) {
1.21 millert 627: if (verbose >= 0)
1.32 mickey 628: warn("%s", out);
1.37 millert 629: error = FAILURE;
1.32 mickey 630: break;
1.21 millert 631: }
1.37 millert 632: }
1.1 mickey 633:
1.32 mickey 634: if (!error && nr < 0) {
635: if (verbose >= 0)
636: warnx("%s: %s", in,
637: errno == EINVAL ? "crc error" : strerror(errno));
1.37 millert 638: error = errno == EINVAL ? WARNING : FAILURE;
1.1 mickey 639: }
640:
1.60 ! deraadt 641: if (error == SUCCESS)
! 642: setfile(out, ofd, sb);
! 643:
1.37 millert 644: if ((method->close)(cookie, &info)) {
1.1 mickey 645: if (!error && verbose >= 0)
1.32 mickey 646: warnx("%s", in);
1.37 millert 647: error = FAILURE;
648: }
649:
1.38 millert 650: if (!nosave) {
1.40 millert 651: if (info.mtime != 0) {
652: sb->st_mtimespec.tv_sec =
653: sb->st_atimespec.tv_sec = info.mtime;
654: sb->st_mtimespec.tv_nsec =
655: sb->st_atimespec.tv_nsec = 0;
656: } else
657: nosave = 1; /* no timestamp to restore */
658:
659: if (cat && strcmp(out, "/dev/stdout") != 0)
660: cat = 0; /* have a real output name */
1.1 mickey 661: }
662:
1.37 millert 663: if (ofd != -1 && close(ofd)) {
1.1 mickey 664: if (!error && verbose >= 0)
1.18 mickey 665: warn("%s", out);
1.37 millert 666: error = FAILURE;
667: }
668:
669: if (!error) {
670: if (list) {
671: if (info.mtime == 0)
672: info.mtime = (u_int32_t)sb->st_mtime;
1.43 millert 673: list_stats(out, method, &info);
1.37 millert 674: } else if (verbose > 0) {
675: verbose_info(out, info.total_in, info.total_out,
676: info.hlen);
677: }
1.1 mickey 678: }
679:
1.21 millert 680: return (error);
1.1 mickey 681: }
682:
683: void
1.60 ! deraadt 684: setfile(const char *name, int fd, struct stat *fs)
1.1 mickey 685: {
1.18 mickey 686: struct timeval tv[2];
1.1 mickey 687:
1.60 ! deraadt 688: if (cat || testmode)
! 689: return;
! 690:
1.40 millert 691: if (!pipin || !nosave) {
692: TIMESPEC_TO_TIMEVAL(&tv[0], &fs->st_atimespec);
693: TIMESPEC_TO_TIMEVAL(&tv[1], &fs->st_mtimespec);
1.60 ! deraadt 694: if (futimes(fd, tv))
1.40 millert 695: warn("utimes: %s", name);
696: }
1.1 mickey 697:
1.40 millert 698: /*
699: * If input was a pipe we don't have any info to restore but we
700: * must set the mode since the current mode on the file is 0200.
701: */
702: if (pipin) {
703: mode_t mask = umask(022);
1.60 ! deraadt 704: fchmod(fd, DEFFILEMODE & ~mask);
1.40 millert 705: umask(mask);
706: return;
707: }
1.1 mickey 708:
709: /*
710: * Changing the ownership probably won't succeed, unless we're root
711: * or POSIX_CHOWN_RESTRICTED is not set. Set uid/gid before setting
712: * the mode; current BSD behavior is to remove all setuid bits on
713: * chown. If chown fails, lose setuid/setgid bits.
714: */
1.40 millert 715: fs->st_mode &= S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO;
1.60 ! deraadt 716: if (fchown(fd, fs->st_uid, fs->st_gid)) {
1.1 mickey 717: if (errno != EPERM)
718: warn("chown: %s", name);
719: fs->st_mode &= ~(S_ISUID|S_ISGID);
720: }
1.60 ! deraadt 721: if (fchmod(fd, fs->st_mode))
1.1 mickey 722: warn("chown: %s", name);
723:
1.60 ! deraadt 724: if (fs->st_flags && fchflags(fd, fs->st_flags))
1.1 mickey 725: warn("chflags: %s", name);
726: }
727:
728: int
1.24 deraadt 729: permission(const char *fname)
1.1 mickey 730: {
731: int ch, first;
732:
733: if (!isatty(fileno(stderr)))
734: return (0);
735: (void)fprintf(stderr, "overwrite %s? ", fname);
736: first = ch = getchar();
737: while (ch != '\n' && ch != EOF)
738: ch = getchar();
739: return (first == 'y');
1.35 millert 740: }
741:
742: /*
1.36 millert 743: * Check infile for a known suffix and return the suffix portion or NULL.
744: */
745: const char *
746: check_suffix(const char *infile)
747: {
748: int i;
749: char *suf, *sep, *separators = ".-_";
750: static char *suffixes[] = { "Z", "gz", "z", "tgz", "taz", NULL };
751:
752: for (sep = separators; *sep != '\0'; sep++) {
753: if ((suf = strrchr(infile, *sep)) == NULL)
754: continue;
755: suf++;
756:
757: for (i = 0; suffixes[i] != NULL; i++) {
758: if (strcmp(suf, suffixes[i]) == 0)
759: return (suf - 1);
760: }
761: }
762: return (NULL);
763: }
764:
765: /*
1.35 millert 766: * Set outfile based on the suffix. In most cases we just strip
767: * off the suffix but things like .tgz and .taz are special.
768: */
769: char *
1.36 millert 770: set_outfile(const char *infile, char *outfile, size_t osize)
1.35 millert 771: {
1.36 millert 772: const char *s;
773: char *cp;
774:
775: if ((s = check_suffix(infile)) == NULL)
1.35 millert 776: return (NULL);
777:
1.36 millert 778: (void)strlcpy(outfile, infile, osize);
779: cp = outfile + (s - infile) + 1;
780: /*
781: * Convert tgz and taz -> tar, else drop the suffix.
782: */
783: if (strcmp(cp, "tgz") == 0) {
784: cp[1] = 'a';
785: cp[2] = 'r';
786: } else if (strcmp(cp, "taz") == 0)
787: cp[2] = 'r';
788: else
789: cp[-1] = '\0';
790: return (outfile);
1.37 millert 791: }
792:
793: /*
794: * Print output for the -l option.
795: */
796: void
797: list_stats(const char *name, const struct compressor *method,
798: struct z_info *info)
799: {
800: static off_t compressed_total, uncompressed_total, header_total;
801: static u_int nruns;
802: char *timestr;
1.43 millert 803:
1.37 millert 804: if (nruns == 0) {
805: if (verbose >= 0) {
806: if (verbose > 0)
1.48 millert 807: fputs("method crc date time ", stdout);
808: puts("compressed uncompressed ratio uncompressed_name");
1.37 millert 809: }
810: }
811: nruns++;
812:
813: if (name != NULL) {
1.48 millert 814: if (strcmp(name, "/dev/stdout") == 0)
815: name += 5;
1.37 millert 816: if (verbose > 0) {
817: timestr = ctime(&info->mtime) + 4;
818: timestr[12] = '\0';
1.48 millert 819: if (timestr[4] == ' ')
820: timestr[4] = '0';
821: printf("%-7.7s %08x %s ", method->name, info->crc,
822: timestr);
1.37 millert 823: }
1.48 millert 824: printf("%10lld %10lld %4.1f%% %s\n",
1.37 millert 825: (long long)(info->total_in + info->hlen),
826: (long long)info->total_out,
1.57 otto 827: ((long long)info->total_out - (long long)info->total_in) *
1.37 millert 828: 100.0 / info->total_out, name);
829: compressed_total += info->total_in;
830: uncompressed_total += info->total_out;
831: header_total += info->hlen;
832: } else if (verbose >= 0) {
833: if (nruns < 3) /* only do totals for > 1 files */
834: return;
835: if (verbose > 0)
1.48 millert 836: fputs(" ", stdout);
837: printf("%10lld %10lld %4.1f%% (totals)\n",
1.37 millert 838: (long long)(compressed_total + header_total),
839: (long long)uncompressed_total,
840: (uncompressed_total - compressed_total) *
841: 100.0 / uncompressed_total);
842: }
843: }
844:
845: void
846: verbose_info(const char *file, off_t compressed, off_t uncompressed,
847: u_int32_t hlen)
848: {
849: if (testmode) {
850: fputs("OK\n", stderr);
851: return;
852: }
853: if (!pipin) {
854: fprintf(stderr, "\t%4.1f%% -- replaced with %s\n",
855: (uncompressed - compressed) * 100.0 / uncompressed, file);
856: }
857: compressed += hlen;
1.44 deraadt 858: fprintf(stderr, "%lld bytes in, %lld bytes out\n",
1.37 millert 859: (long long)(decomp ? compressed : uncompressed),
860: (long long)(decomp ? uncompressed : compressed));
1.1 mickey 861: }
862:
1.31 millert 863: __dead void
864: usage(int status)
1.1 mickey 865: {
866: fprintf(stderr,
1.31 millert 867: "usage: %s [-cdfghOqrtvV] [-b bits] [-S suffix] [-[1-9]] [file ...]\n",
1.18 mickey 868: __progname);
1.31 millert 869: exit(status);
1.1 mickey 870: }
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