Annotation of src/usr.bin/xinstall/xinstall.c, Revision 1.77
1.77 ! cheloha 1: /* $OpenBSD: xinstall.c,v 1.76 2021/11/28 19:28:42 deraadt Exp $ */
1.2 deraadt 2: /* $NetBSD: xinstall.c,v 1.9 1995/12/20 10:25:17 jonathan Exp $ */
1.1 deraadt 3:
4: /*
5: * Copyright (c) 1987, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
1.34 millert 16: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
32:
1.76 deraadt 33: #include <sys/types.h>
1.1 deraadt 34: #include <sys/wait.h>
35: #include <sys/mman.h>
36: #include <sys/stat.h>
37:
38: #include <ctype.h>
1.4 millert 39: #include <err.h>
1.1 deraadt 40: #include <errno.h>
41: #include <fcntl.h>
42: #include <grp.h>
43: #include <paths.h>
44: #include <pwd.h>
45: #include <stdio.h>
46: #include <stdlib.h>
47: #include <string.h>
48: #include <unistd.h>
1.58 deraadt 49: #include <limits.h>
1.60 jasper 50: #include <libgen.h>
1.1 deraadt 51:
52: #include "pathnames.h"
53:
1.76 deraadt 54: #define _MAXBSIZE (64 * 1024)
55:
1.58 deraadt 56: #define MINIMUM(a, b) (((a) < (b)) ? (a) : (b))
57:
1.19 millert 58: #define DIRECTORY 0x01 /* Tell install it's a directory. */
59: #define SETFLAGS 0x02 /* Tell install to set flags. */
1.64 millert 60: #define USEFSYNC 0x04 /* Tell install to use fsync(2). */
1.19 millert 61: #define NOCHANGEBITS (UF_IMMUTABLE | UF_APPEND | SF_IMMUTABLE | SF_APPEND)
62: #define BACKUP_SUFFIX ".old"
63:
1.70 espie 64: int dobackup, docompare, dodest, dodir, dopreserve, dostrip;
1.1 deraadt 65: int mode = S_IRWXU|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH;
1.58 deraadt 66: char pathbuf[PATH_MAX], tempfile[PATH_MAX];
1.19 millert 67: char *suffix = BACKUP_SUFFIX;
1.67 millert 68: uid_t uid = (uid_t)-1;
69: gid_t gid = (gid_t)-1;
1.1 deraadt 70:
1.31 millert 71: void copy(int, char *, int, char *, off_t, int);
1.59 guenther 72: int compare(int, const char *, off_t, int, const char *, off_t);
1.31 millert 73: void install(char *, char *, u_long, u_int);
1.62 jasper 74: void install_dir(char *, int);
1.31 millert 75: void strip(char *);
76: void usage(void);
77: int create_tempfile(char *, char *, size_t);
78: int file_write(int, char *, size_t, int *, int *, int);
1.33 tedu 79: void file_flush(int, int);
1.1 deraadt 80:
81: int
1.35 deraadt 82: main(int argc, char *argv[])
1.1 deraadt 83: {
84: struct stat from_sb, to_sb;
1.41 otto 85: void *set;
1.23 mickey 86: u_int32_t fset;
1.1 deraadt 87: u_int iflags;
88: int ch, no_target;
89: char *flags, *to_name, *group = NULL, *owner = NULL;
1.67 millert 90: const char *errstr;
1.1 deraadt 91:
92: iflags = 0;
1.64 millert 93: while ((ch = getopt(argc, argv, "B:bCcDdFf:g:m:o:pSs")) != -1)
1.56 okan 94: switch(ch) {
1.4 millert 95: case 'C':
96: docompare = 1;
97: break;
1.19 millert 98: case 'B':
99: suffix = optarg;
100: /* fall through; -B implies -b */
101: case 'b':
102: dobackup = 1;
103: break;
1.1 deraadt 104: case 'c':
1.4 millert 105: /* For backwards compatibility. */
1.1 deraadt 106: break;
1.64 millert 107: case 'F':
108: iflags |= USEFSYNC;
109: break;
1.1 deraadt 110: case 'f':
111: flags = optarg;
1.23 mickey 112: if (strtofflags(&flags, &fset, NULL))
1.63 millert 113: errx(1, "%s: invalid flag", flags);
1.1 deraadt 114: iflags |= SETFLAGS;
115: break;
116: case 'g':
117: group = optarg;
118: break;
119: case 'm':
120: if (!(set = setmode(optarg)))
1.63 millert 121: errx(1, "%s: invalid file mode", optarg);
1.1 deraadt 122: mode = getmode(set, 0);
1.16 deraadt 123: free(set);
1.1 deraadt 124: break;
125: case 'o':
126: owner = optarg;
127: break;
1.4 millert 128: case 'p':
129: docompare = dopreserve = 1;
130: break;
131: case 'S':
1.70 espie 132: /* For backwards compatibility. */
1.4 millert 133: break;
1.1 deraadt 134: case 's':
135: dostrip = 1;
136: break;
1.60 jasper 137: case 'D':
138: dodest = 1;
139: break;
1.1 deraadt 140: case 'd':
141: dodir = 1;
142: break;
143: default:
144: usage();
145: }
146: argc -= optind;
147: argv += optind;
148:
1.4 millert 149: /* some options make no sense when creating directories */
1.70 espie 150: if ((docompare || dostrip) && dodir)
1.1 deraadt 151: usage();
152:
153: /* must have at least two arguments, except when creating directories */
1.74 espie 154: if (argc == 0 || (argc == 1 && !dodir))
1.1 deraadt 155: usage();
156:
157: /* get group and owner id's */
1.67 millert 158: if (group != NULL && gid_from_group(group, &gid) == -1) {
159: gid = strtonum(group, 0, GID_MAX, &errstr);
160: if (errstr != NULL)
161: errx(1, "unknown group %s", group);
162: }
163: if (owner != NULL && uid_from_user(owner, &uid) == -1) {
164: uid = strtonum(owner, 0, UID_MAX, &errstr);
165: if (errstr != NULL)
166: errx(1, "unknown user %s", owner);
167: }
1.1 deraadt 168:
169: if (dodir) {
170: for (; *argv != NULL; ++argv)
1.62 jasper 171: install_dir(*argv, mode);
1.63 millert 172: exit(0);
1.1 deraadt 173: /* NOTREACHED */
174: }
175:
1.60 jasper 176: if (dodest) {
177: char *dest = dirname(argv[argc - 1]);
178: if (dest == NULL)
1.63 millert 179: errx(1, "cannot determine dirname");
1.62 jasper 180: /*
181: * When -D is passed, do not chmod the directory with the mode set for
182: * the target file. If more restrictive permissions are required then
183: * '-d -m' ought to be used instead.
184: */
185: install_dir(dest, 0755);
1.60 jasper 186: }
187:
1.1 deraadt 188: no_target = stat(to_name = argv[argc - 1], &to_sb);
189: if (!no_target && S_ISDIR(to_sb.st_mode)) {
190: for (; *argv != to_name; ++argv)
191: install(*argv, to_name, fset, iflags | DIRECTORY);
1.63 millert 192: exit(0);
1.4 millert 193: /* NOTREACHED */
1.1 deraadt 194: }
195:
196: /* can't do file1 file2 directory/file */
197: if (argc != 2)
1.63 millert 198: errx(1, "Target: %s", argv[argc-1]);
1.1 deraadt 199:
200: if (!no_target) {
201: if (stat(*argv, &from_sb))
1.63 millert 202: err(1, "%s", *argv);
1.1 deraadt 203: if (!S_ISREG(to_sb.st_mode))
1.63 millert 204: errc(1, EFTYPE, "%s", to_name);
1.1 deraadt 205: if (to_sb.st_dev == from_sb.st_dev &&
206: to_sb.st_ino == from_sb.st_ino)
1.63 millert 207: errx(1, "%s and %s are the same file", *argv, to_name);
1.1 deraadt 208: }
209: install(*argv, to_name, fset, iflags);
1.63 millert 210: exit(0);
1.4 millert 211: /* NOTREACHED */
1.1 deraadt 212: }
213:
214: /*
215: * install --
216: * build a path name and install the file
217: */
218: void
1.35 deraadt 219: install(char *from_name, char *to_name, u_long fset, u_int flags)
1.1 deraadt 220: {
221: struct stat from_sb, to_sb;
1.59 guenther 222: struct timespec ts[2];
1.4 millert 223: int devnull, from_fd, to_fd, serrno, files_match = 0;
1.1 deraadt 224: char *p;
1.71 espie 225: char *target_name = tempfile;
1.1 deraadt 226:
1.4 millert 227: (void)memset((void *)&from_sb, 0, sizeof(from_sb));
228: (void)memset((void *)&to_sb, 0, sizeof(to_sb));
229:
1.1 deraadt 230: /* If try to install NULL file to a directory, fails. */
231: if (flags & DIRECTORY || strcmp(from_name, _PATH_DEVNULL)) {
232: if (stat(from_name, &from_sb))
1.63 millert 233: err(1, "%s", from_name);
1.1 deraadt 234: if (!S_ISREG(from_sb.st_mode))
1.63 millert 235: errc(1, EFTYPE, "%s", from_name);
1.1 deraadt 236: /* Build the target path. */
237: if (flags & DIRECTORY) {
238: (void)snprintf(pathbuf, sizeof(pathbuf), "%s/%s",
239: to_name,
1.11 millert 240: (p = strrchr(from_name, '/')) ? ++p : from_name);
1.1 deraadt 241: to_name = pathbuf;
242: }
243: devnull = 0;
244: } else {
245: devnull = 1;
246: }
247:
1.4 millert 248: if (stat(to_name, &to_sb) == 0) {
249: /* Only compare against regular files. */
250: if (docompare && !S_ISREG(to_sb.st_mode)) {
251: docompare = 0;
1.57 guenther 252: warnc(EFTYPE, "%s", to_name);
1.4 millert 253: }
254: } else if (docompare) {
255: /* File does not exist so silently ignore compare flag. */
256: docompare = 0;
257: }
258:
1.52 millert 259: if (!devnull) {
1.75 deraadt 260: if ((from_fd = open(from_name, O_RDONLY)) == -1)
1.63 millert 261: err(1, "%s", from_name);
1.52 millert 262: }
263:
1.70 espie 264: to_fd = create_tempfile(to_name, tempfile, sizeof(tempfile));
265: if (to_fd < 0)
266: err(1, "%s", tempfile);
1.4 millert 267:
1.70 espie 268: if (!devnull)
269: copy(from_fd, from_name, to_fd, tempfile, from_sb.st_size,
270: ((off_t)from_sb.st_blocks * S_BLKSIZE < from_sb.st_size));
1.2 deraadt 271:
272: if (dostrip) {
1.70 espie 273: strip(tempfile);
1.2 deraadt 274:
275: /*
276: * Re-open our fd on the target, in case we used a strip
277: * that does not work in-place -- like gnu binutils strip.
278: */
279: close(to_fd);
1.75 deraadt 280: if ((to_fd = open(tempfile, O_RDONLY)) == -1)
1.63 millert 281: err(1, "stripping %s", to_name);
1.4 millert 282: }
283:
284: /*
285: * Compare the (possibly stripped) temp file to the target.
286: */
1.70 espie 287: if (docompare) {
1.4 millert 288: int temp_fd = to_fd;
289: struct stat temp_sb;
290:
291: /* Re-open to_fd using the real target name. */
1.75 deraadt 292: if ((to_fd = open(to_name, O_RDONLY)) == -1)
1.63 millert 293: err(1, "%s", to_name);
1.4 millert 294:
295: if (fstat(temp_fd, &temp_sb)) {
296: serrno = errno;
297: (void)unlink(tempfile);
1.63 millert 298: errc(1, serrno, "%s", tempfile);
1.4 millert 299: }
300:
1.59 guenther 301: if (compare(temp_fd, tempfile, temp_sb.st_size, to_fd,
302: to_name, to_sb.st_size) == 0) {
1.4 millert 303: /*
304: * If target has more than one link we need to
305: * replace it in order to snap the extra links.
306: * Need to preserve target file times, though.
307: */
308: if (to_sb.st_nlink != 1) {
1.59 guenther 309: ts[0] = to_sb.st_atim;
310: ts[1] = to_sb.st_mtim;
311: futimens(temp_fd, ts);
1.4 millert 312: } else {
313: files_match = 1;
314: (void)unlink(tempfile);
1.71 espie 315: target_name = to_name;
316: (void)close(temp_fd);
1.4 millert 317: }
318: }
1.71 espie 319: if (!files_match) {
320: (void)close(to_fd);
321: to_fd = temp_fd;
322: }
1.4 millert 323: }
324:
325: /*
1.30 millert 326: * Preserve the timestamp of the source file if necessary.
1.4 millert 327: */
328: if (dopreserve && !files_match) {
1.59 guenther 329: ts[0] = from_sb.st_atim;
330: ts[1] = from_sb.st_mtim;
331: futimens(to_fd, ts);
1.2 deraadt 332: }
333:
1.1 deraadt 334: /*
335: * Set owner, group, mode for target; do the chown first,
336: * chown may lose the setuid bits.
337: */
1.48 phessler 338: if ((gid != (gid_t)-1 || uid != (uid_t)-1) &&
339: fchown(to_fd, uid, gid)) {
1.1 deraadt 340: serrno = errno;
1.71 espie 341: if (target_name == tempfile)
342: (void)unlink(target_name);
343: errx(1, "%s: chown/chgrp: %s", target_name, strerror(serrno));
1.1 deraadt 344: }
345: if (fchmod(to_fd, mode)) {
346: serrno = errno;
1.71 espie 347: if (target_name == tempfile)
348: (void)unlink(target_name);
349: errx(1, "%s: chmod: %s", target_name, strerror(serrno));
1.1 deraadt 350: }
351:
352: /*
353: * If provided a set of flags, set them, otherwise, preserve the
354: * flags, except for the dump flag.
355: */
356: if (fchflags(to_fd,
357: flags & SETFLAGS ? fset : from_sb.st_flags & ~UF_NODUMP)) {
1.12 millert 358: if (errno != EOPNOTSUPP || (from_sb.st_flags & ~UF_NODUMP) != 0)
1.71 espie 359: warnx("%s: chflags: %s", target_name, strerror(errno));
1.1 deraadt 360: }
361:
1.64 millert 362: if (flags & USEFSYNC)
363: fsync(to_fd);
1.1 deraadt 364: (void)close(to_fd);
1.18 millert 365: if (!devnull)
366: (void)close(from_fd);
1.48 phessler 367:
368: /*
1.70 espie 369: * Move the new file into place if the files are different
370: * or were not compared.
1.48 phessler 371: */
1.70 espie 372: if (!files_match) {
1.48 phessler 373: /* Try to turn off the immutable bits. */
374: if (to_sb.st_flags & (NOCHANGEBITS))
375: (void)chflags(to_name, to_sb.st_flags & ~(NOCHANGEBITS));
376: if (dobackup) {
1.58 deraadt 377: char backup[PATH_MAX];
378: (void)snprintf(backup, PATH_MAX, "%s%s", to_name,
1.48 phessler 379: suffix);
380: /* It is ok for the target file not to exist. */
1.73 deraadt 381: if (rename(to_name, backup) == -1 && errno != ENOENT) {
1.48 phessler 382: serrno = errno;
383: unlink(tempfile);
1.63 millert 384: errx(1, "rename: %s to %s: %s", to_name,
1.48 phessler 385: backup, strerror(serrno));
386: }
387: }
1.73 deraadt 388: if (rename(tempfile, to_name) == -1 ) {
1.48 phessler 389: serrno = errno;
390: unlink(tempfile);
1.63 millert 391: errx(1, "rename: %s to %s: %s", tempfile,
1.48 phessler 392: to_name, strerror(serrno));
393: }
394: }
1.1 deraadt 395: }
396:
397: /*
398: * copy --
399: * copy from one file to another
400: */
401: void
1.35 deraadt 402: copy(int from_fd, char *from_name, int to_fd, char *to_name, off_t size,
403: int sparse)
1.1 deraadt 404: {
1.29 mpech 405: ssize_t nr, nw;
1.1 deraadt 406: int serrno;
1.76 deraadt 407: char *p, buf[_MAXBSIZE];
1.1 deraadt 408:
1.51 millert 409: if (size == 0)
410: return;
411:
1.7 millert 412: /* Rewind file descriptors. */
413: if (lseek(from_fd, (off_t)0, SEEK_SET) == (off_t)-1)
1.63 millert 414: err(1, "lseek: %s", from_name);
1.7 millert 415: if (lseek(to_fd, (off_t)0, SEEK_SET) == (off_t)-1)
1.63 millert 416: err(1, "lseek: %s", to_name);
1.7 millert 417:
1.1 deraadt 418: /*
419: * Mmap and write if less than 8M (the limit is so we don't totally
420: * trash memory on big files. This is really a minor hack, but it
1.17 millert 421: * wins some CPU back. Sparse files need special treatment.
1.1 deraadt 422: */
1.51 millert 423: if (!sparse && size <= 8 * 1048576) {
1.50 espie 424: size_t siz;
1.17 millert 425:
1.19 millert 426: if ((p = mmap(NULL, (size_t)size, PROT_READ, MAP_PRIVATE,
1.38 grange 427: from_fd, (off_t)0)) == MAP_FAILED) {
1.6 millert 428: serrno = errno;
429: (void)unlink(to_name);
1.63 millert 430: errc(1, serrno, "%s", from_name);
1.6 millert 431: }
1.50 espie 432: madvise(p, size, MADV_SEQUENTIAL);
1.3 deraadt 433: siz = (size_t)size;
1.6 millert 434: if ((nw = write(to_fd, p, siz)) != siz) {
435: serrno = errno;
436: (void)unlink(to_name);
1.63 millert 437: errx(1, "%s: %s",
1.6 millert 438: to_name, strerror(nw > 0 ? EIO : serrno));
439: }
1.4 millert 440: (void) munmap(p, (size_t)size);
1.1 deraadt 441: } else {
1.17 millert 442: int sz, rem, isem = 1;
443: struct stat sb;
444:
445: /*
446: * Pass the blocksize of the file being written to the write
447: * routine. if the size is zero, use the default S_BLKSIZE.
448: */
449: if (fstat(to_fd, &sb) != 0 || sb.st_blksize == 0)
450: sz = S_BLKSIZE;
451: else
452: sz = sb.st_blksize;
1.20 millert 453: rem = sz;
1.17 millert 454:
455: while ((nr = read(from_fd, buf, sizeof(buf))) > 0) {
456: if (sparse)
457: nw = file_write(to_fd, buf, nr, &rem, &isem, sz);
458: else
459: nw = write(to_fd, buf, nr);
460: if (nw != nr) {
1.1 deraadt 461: serrno = errno;
462: (void)unlink(to_name);
1.63 millert 463: errx(1, "%s: %s",
1.1 deraadt 464: to_name, strerror(nw > 0 ? EIO : serrno));
465: }
1.17 millert 466: }
1.33 tedu 467: if (sparse)
468: file_flush(to_fd, isem);
1.1 deraadt 469: if (nr != 0) {
470: serrno = errno;
471: (void)unlink(to_name);
1.63 millert 472: errc(1, serrno, "%s", from_name);
1.1 deraadt 473: }
474: }
475: }
476:
477: /*
1.4 millert 478: * compare --
479: * compare two files; non-zero means files differ
480: */
481: int
1.59 guenther 482: compare(int from_fd, const char *from_name, off_t from_len, int to_fd,
483: const char *to_name, off_t to_len)
1.4 millert 484: {
485: caddr_t p1, p2;
1.59 guenther 486: size_t length;
487: off_t from_off, to_off, remainder;
1.4 millert 488: int dfound;
489:
1.50 espie 490: if (from_len == 0 && from_len == to_len)
491: return (0);
492:
1.4 millert 493: if (from_len != to_len)
1.50 espie 494: return (1);
1.4 millert 495:
496: /*
497: * Compare the two files being careful not to mmap
498: * more than 8M at a time.
499: */
1.21 millert 500: from_off = to_off = (off_t)0;
1.4 millert 501: remainder = from_len;
502: do {
1.58 deraadt 503: length = MINIMUM(remainder, 8 * 1048576);
1.4 millert 504: remainder -= length;
505:
1.22 mickey 506: if ((p1 = mmap(NULL, length, PROT_READ, MAP_PRIVATE,
1.38 grange 507: from_fd, from_off)) == MAP_FAILED)
1.63 millert 508: err(1, "%s", from_name);
1.22 mickey 509: if ((p2 = mmap(NULL, length, PROT_READ, MAP_PRIVATE,
1.38 grange 510: to_fd, to_off)) == MAP_FAILED)
1.63 millert 511: err(1, "%s", to_name);
1.39 mickey 512: if (length) {
513: madvise(p1, length, MADV_SEQUENTIAL);
514: madvise(p2, length, MADV_SEQUENTIAL);
515: }
1.4 millert 516:
517: dfound = memcmp(p1, p2, length);
518:
519: (void) munmap(p1, length);
520: (void) munmap(p2, length);
1.21 millert 521:
522: from_off += length;
523: to_off += length;
1.4 millert 524:
1.7 millert 525: } while (!dfound && remainder > 0);
1.4 millert 526:
527: return(dfound);
528: }
529:
530: /*
1.1 deraadt 531: * strip --
532: * use strip(1) to strip the target file
533: */
534: void
1.35 deraadt 535: strip(char *to_name)
1.1 deraadt 536: {
537: int serrno, status;
1.26 millert 538: char * volatile path_strip;
1.66 deraadt 539: pid_t pid;
1.18 millert 540:
1.13 millert 541: if (issetugid() || (path_strip = getenv("STRIP")) == NULL)
542: path_strip = _PATH_STRIP;
1.1 deraadt 543:
1.66 deraadt 544: switch ((pid = vfork())) {
1.1 deraadt 545: case -1:
546: serrno = errno;
547: (void)unlink(to_name);
1.63 millert 548: errc(1, serrno, "forks");
1.1 deraadt 549: case 0:
1.44 moritz 550: execl(path_strip, "strip", "--", to_name, (char *)NULL);
1.13 millert 551: warn("%s", path_strip);
1.63 millert 552: _exit(1);
1.1 deraadt 553: default:
1.66 deraadt 554: while (waitpid(pid, &status, 0) == -1) {
555: if (errno != EINTR)
556: break;
557: }
558: if (!WIFEXITED(status))
1.1 deraadt 559: (void)unlink(to_name);
560: }
561: }
562:
563: /*
564: * install_dir --
1.42 jsg 565: * build directory hierarchy
1.1 deraadt 566: */
567: void
1.62 jasper 568: install_dir(char *path, int mode)
1.1 deraadt 569: {
1.29 mpech 570: char *p;
1.8 imp 571: struct stat sb;
572: int ch;
573:
574: for (p = path;; ++p)
575: if (!*p || (p != path && *p == '/')) {
576: ch = *p;
577: *p = '\0';
1.54 naddy 578: if (mkdir(path, 0777)) {
579: int mkdir_errno = errno;
580: if (stat(path, &sb)) {
581: /* Not there; use mkdir()s errno */
1.63 millert 582: errc(1, mkdir_errno, "%s",
1.57 guenther 583: path);
1.54 naddy 584: /* NOTREACHED */
585: }
586: if (!S_ISDIR(sb.st_mode)) {
587: /* Is there, but isn't a directory */
1.63 millert 588: errc(1, ENOTDIR, "%s", path);
1.1 deraadt 589: /* NOTREACHED */
1.8 imp 590: }
591: }
592: if (!(*p = ch))
1.1 deraadt 593: break;
1.8 imp 594: }
1.1 deraadt 595:
1.4 millert 596: if (((gid != (gid_t)-1 || uid != (uid_t)-1) && chown(path, uid, gid)) ||
1.8 imp 597: chmod(path, mode)) {
598: warn("%s", path);
599: }
1.1 deraadt 600: }
601:
602: /*
603: * usage --
604: * print a usage message and die
605: */
606: void
1.35 deraadt 607: usage(void)
1.1 deraadt 608: {
609: (void)fprintf(stderr, "\
1.65 jmc 610: usage: install [-bCcDdFpSs] [-B suffix] [-f flags] [-g group] [-m mode] [-o owner]\n source ... target ...\n");
1.63 millert 611: exit(1);
1.4 millert 612: /* NOTREACHED */
613: }
614:
615: /*
616: * create_tempfile --
617: * create a temporary file based on path and open it
618: */
619: int
1.35 deraadt 620: create_tempfile(char *path, char *temp, size_t tsize)
1.4 millert 621: {
622: char *p;
623:
1.43 millert 624: strlcpy(temp, path, tsize);
625: if ((p = strrchr(temp, '/')) != NULL)
1.4 millert 626: p++;
627: else
628: p = temp;
1.43 millert 629: *p = '\0';
630: strlcat(p, "INS@XXXXXXXXXX", tsize);
1.4 millert 631:
632: return(mkstemp(temp));
1.17 millert 633: }
634:
635: /*
636: * file_write()
637: * Write/copy a file (during copy or archive extract). This routine knows
638: * how to copy files with lseek holes in it. (Which are read as file
639: * blocks containing all 0's but do not have any file blocks associated
640: * with the data). Typical examples of these are files created by dbm
641: * variants (.pag files). While the file size of these files are huge, the
642: * actual storage is quite small (the files are sparse). The problem is
643: * the holes read as all zeros so are probably stored on the archive that
644: * way (there is no way to determine if the file block is really a hole,
645: * we only know that a file block of all zero's can be a hole).
646: * At this writing, no major archive format knows how to archive files
647: * with holes. However, on extraction (or during copy, -rw) we have to
648: * deal with these files. Without detecting the holes, the files can
649: * consume a lot of file space if just written to disk. This replacement
650: * for write when passed the basic allocation size of a file system block,
651: * uses lseek whenever it detects the input data is all 0 within that
652: * file block. In more detail, the strategy is as follows:
653: * While the input is all zero keep doing an lseek. Keep track of when we
1.45 krw 654: * pass over file block boundaries. Only write when we hit a non zero
1.17 millert 655: * input. once we have written a file block, we continue to write it to
656: * the end (we stop looking at the input). When we reach the start of the
657: * next file block, start checking for zero blocks again. Working on file
1.45 krw 658: * block boundaries significantly reduces the overhead when copying files
1.17 millert 659: * that are NOT very sparse. This overhead (when compared to a write) is
660: * almost below the measurement resolution on many systems. Without it,
661: * files with holes cannot be safely copied. It does has a side effect as
662: * it can put holes into files that did not have them before, but that is
663: * not a problem since the file contents are unchanged (in fact it saves
664: * file space). (Except on paging files for diskless clients. But since we
665: * cannot determine one of those file from here, we ignore them). If this
666: * ever ends up on a system where CTG files are supported and the holes
667: * are not desired, just do a conditional test in those routines that
668: * call file_write() and have it call write() instead. BEFORE CLOSING THE
669: * FILE, make sure to call file_flush() when the last write finishes with
670: * an empty block. A lot of file systems will not create an lseek hole at
671: * the end. In this case we drop a single 0 at the end to force the
672: * trailing 0's in the file.
673: * ---Parameters---
674: * rem: how many bytes left in this file system block
675: * isempt: have we written to the file block yet (is it empty)
676: * sz: basic file block allocation size
677: * cnt: number of bytes on this write
678: * str: buffer to write
679: * Return:
680: * number of bytes written, -1 on write (or lseek) error.
681: */
682:
683: int
1.35 deraadt 684: file_write(int fd, char *str, size_t cnt, int *rem, int *isempt, int sz)
1.17 millert 685: {
1.29 mpech 686: char *pt;
687: char *end;
688: size_t wcnt;
689: char *st = str;
1.17 millert 690:
691: /*
692: * while we have data to process
693: */
694: while (cnt) {
695: if (!*rem) {
696: /*
697: * We are now at the start of file system block again
698: * (or what we think one is...). start looking for
699: * empty blocks again
700: */
701: *isempt = 1;
702: *rem = sz;
703: }
704:
705: /*
706: * only examine up to the end of the current file block or
707: * remaining characters to write, whatever is smaller
708: */
1.58 deraadt 709: wcnt = MINIMUM(cnt, *rem);
1.17 millert 710: cnt -= wcnt;
711: *rem -= wcnt;
712: if (*isempt) {
713: /*
714: * have not written to this block yet, so we keep
715: * looking for zero's
716: */
717: pt = st;
718: end = st + wcnt;
719:
720: /*
721: * look for a zero filled buffer
722: */
723: while ((pt < end) && (*pt == '\0'))
724: ++pt;
725:
726: if (pt == end) {
727: /*
728: * skip, buf is empty so far
729: */
1.73 deraadt 730: if (lseek(fd, (off_t)wcnt, SEEK_CUR) == -1) {
1.17 millert 731: warn("lseek");
732: return(-1);
733: }
734: st = pt;
735: continue;
736: }
737: /*
738: * drat, the buf is not zero filled
739: */
740: *isempt = 0;
741: }
742:
743: /*
744: * have non-zero data in this file system block, have to write
745: */
746: if (write(fd, st, wcnt) != wcnt) {
747: warn("write");
748: return(-1);
749: }
750: st += wcnt;
751: }
752: return(st - str);
1.33 tedu 753: }
754:
755: /*
756: * file_flush()
757: * when the last file block in a file is zero, many file systems will not
758: * let us create a hole at the end. To get the last block with zeros, we
759: * write the last BYTE with a zero (back up one byte and write a zero).
760: */
761: void
762: file_flush(int fd, int isempt)
763: {
764: static char blnk[] = "\0";
765:
766: /*
767: * silly test, but make sure we are only called when the last block is
768: * filled with all zeros.
769: */
770: if (!isempt)
771: return;
772:
773: /*
774: * move back one byte and write a zero
775: */
1.73 deraadt 776: if (lseek(fd, (off_t)-1, SEEK_CUR) == -1) {
1.33 tedu 777: warn("Failed seek on file");
778: return;
779: }
780:
1.73 deraadt 781: if (write(fd, blnk, 1) == -1)
1.33 tedu 782: warn("Failed write to file");
783: return;
1.1 deraadt 784: }
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