Annotation of src/usr.bin/xinstall/xinstall.c, Revision 1.2
1.2 ! deraadt 1: /* $NetBSD: xinstall.c,v 1.9 1995/12/20 10:25:17 jonathan Exp $ */
1.1 deraadt 2:
3: /*
4: * Copyright (c) 1987, 1993
5: * The Regents of the University of California. All rights reserved.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: * 3. All advertising materials mentioning features or use of this software
16: * must display the following acknowledgement:
17: * This product includes software developed by the University of
18: * California, Berkeley and its contributors.
19: * 4. Neither the name of the University nor the names of its contributors
20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: */
35:
36: #ifndef lint
37: static char copyright[] =
38: "@(#) Copyright (c) 1987, 1993\n\
39: The Regents of the University of California. All rights reserved.\n";
40: #endif /* not lint */
41:
42: #ifndef lint
43: #if 0
44: static char sccsid[] = "@(#)xinstall.c 8.1 (Berkeley) 7/21/93";
45: #endif
1.2 ! deraadt 46: static char rcsid[] = "$NetBSD: xinstall.c,v 1.9 1995/12/20 10:25:17 jonathan Exp $";
1.1 deraadt 47: #endif /* not lint */
48:
49: #include <sys/param.h>
50: #include <sys/wait.h>
51: #include <sys/mman.h>
52: #include <sys/stat.h>
53:
54: #include <ctype.h>
55: #include <errno.h>
56: #include <fcntl.h>
57: #include <grp.h>
58: #include <paths.h>
59: #include <pwd.h>
60: #include <stdio.h>
61: #include <stdlib.h>
62: #include <string.h>
63: #include <unistd.h>
64: #include <err.h>
65:
66: #include "pathnames.h"
67:
68: struct passwd *pp;
69: struct group *gp;
70: int docopy, dodir, dostrip;
71: int mode = S_IRWXU|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH;
72: char pathbuf[MAXPATHLEN];
73: uid_t uid;
74: gid_t gid;
75:
76: #define DIRECTORY 0x01 /* Tell install it's a directory. */
77: #define SETFLAGS 0x02 /* Tell install to set flags. */
78:
79: void copy __P((int, char *, int, char *, off_t));
80: void install __P((char *, char *, u_long, u_int));
81: void install_dir __P((char *));
82: u_long string_to_flags __P((char **, u_long *, u_long *));
83: void strip __P((char *));
84: void usage __P((void));
85:
86: int
87: main(argc, argv)
88: int argc;
89: char *argv[];
90: {
91: struct stat from_sb, to_sb;
92: mode_t *set;
93: u_long fset;
94: u_int iflags;
95: int ch, no_target;
96: char *flags, *to_name, *group = NULL, *owner = NULL;
97:
98: iflags = 0;
99: while ((ch = getopt(argc, argv, "cf:g:m:o:sd")) != EOF)
100: switch((char)ch) {
101: case 'c':
102: docopy = 1;
103: break;
104: case 'f':
105: flags = optarg;
106: if (string_to_flags(&flags, &fset, NULL))
107: errx(1, "%s: invalid flag", flags);
108: iflags |= SETFLAGS;
109: break;
110: case 'g':
111: group = optarg;
112: break;
113: case 'm':
114: if (!(set = setmode(optarg)))
115: errx(1, "%s: invalid file mode", optarg);
116: mode = getmode(set, 0);
117: break;
118: case 'o':
119: owner = optarg;
120: break;
121: case 's':
122: dostrip = 1;
123: break;
124: case 'd':
125: dodir = 1;
126: break;
127: case '?':
128: default:
129: usage();
130: }
131: argc -= optind;
132: argv += optind;
133:
134: /* copy and strip options make no sense when creating directories */
135: if ((docopy || dostrip) && dodir)
136: usage();
137:
138: /* must have at least two arguments, except when creating directories */
139: if (argc < 2 && !dodir)
140: usage();
141:
142: /* get group and owner id's */
143: if (group && !(gp = getgrnam(group)) && !isdigit(*group))
144: errx(1, "unknown group %s", group);
145: gid = (group) ? ((gp) ? gp->gr_gid : atoi(group)) : -1;
146: if (owner && !(pp = getpwnam(owner)) && !isdigit(*owner))
147: errx(1, "unknown user %s", owner);
148: uid = (owner) ? ((pp) ? pp->pw_uid : atoi(owner)) : -1;
149:
150: if (dodir) {
151: for (; *argv != NULL; ++argv)
152: install_dir(*argv);
153: exit (0);
154: /* NOTREACHED */
155: }
156:
157: no_target = stat(to_name = argv[argc - 1], &to_sb);
158: if (!no_target && S_ISDIR(to_sb.st_mode)) {
159: for (; *argv != to_name; ++argv)
160: install(*argv, to_name, fset, iflags | DIRECTORY);
161: exit(0);
162: }
163:
164: /* can't do file1 file2 directory/file */
165: if (argc != 2)
166: usage();
167:
168: if (!no_target) {
169: if (stat(*argv, &from_sb))
170: err(1, "%s", *argv);
171: if (!S_ISREG(to_sb.st_mode))
172: errx(1, "%s: %s", to_name, strerror(EFTYPE));
173: if (to_sb.st_dev == from_sb.st_dev &&
174: to_sb.st_ino == from_sb.st_ino)
175: errx(1, "%s and %s are the same file", *argv, to_name);
176: /*
177: * Unlink now... avoid ETXTBSY errors later. Try and turn
178: * off the append/immutable bits -- if we fail, go ahead,
179: * it might work.
180: */
181: #define NOCHANGEBITS (UF_IMMUTABLE | UF_APPEND | SF_IMMUTABLE | SF_APPEND)
182: if (to_sb.st_flags & NOCHANGEBITS)
183: (void)chflags(to_name,
184: to_sb.st_flags & ~(NOCHANGEBITS));
185: (void)unlink(to_name);
186: }
187: install(*argv, to_name, fset, iflags);
188: exit(0);
189: }
190:
191: /*
192: * install --
193: * build a path name and install the file
194: */
195: void
196: install(from_name, to_name, fset, flags)
197: char *from_name, *to_name;
198: u_long fset;
199: u_int flags;
200: {
201: struct stat from_sb, to_sb;
202: int devnull, from_fd, to_fd, serrno;
203: char *p;
204:
205: /* If try to install NULL file to a directory, fails. */
206: if (flags & DIRECTORY || strcmp(from_name, _PATH_DEVNULL)) {
207: if (stat(from_name, &from_sb))
208: err(1, "%s", from_name);
209: if (!S_ISREG(from_sb.st_mode))
210: errx(1, "%s: %s", from_name, strerror(EFTYPE));
211: /* Build the target path. */
212: if (flags & DIRECTORY) {
213: (void)snprintf(pathbuf, sizeof(pathbuf), "%s/%s",
214: to_name,
215: (p = rindex(from_name, '/')) ? ++p : from_name);
216: to_name = pathbuf;
217: }
218: devnull = 0;
219: } else {
220: from_sb.st_flags = 0; /* XXX */
221: devnull = 1;
222: }
223:
224: /*
225: * Unlink now... avoid ETXTBSY errors later. Try and turn
226: * off the append/immutable bits -- if we fail, go ahead,
227: * it might work.
228: */
229: if (stat(to_name, &to_sb) == 0 &&
230: to_sb.st_flags & (NOCHANGEBITS))
231: (void)chflags(to_name, to_sb.st_flags & ~(NOCHANGEBITS));
232: (void)unlink(to_name);
233:
234: /* Create target. */
235: if ((to_fd = open(to_name,
236: O_CREAT | O_WRONLY | O_TRUNC, S_IRUSR | S_IWUSR)) < 0)
237: err(1, "%s", to_name);
238: if (!devnull) {
239: if ((from_fd = open(from_name, O_RDONLY, 0)) < 0) {
240: (void)unlink(to_name);
241: err(1, "%s", from_name);
242: }
243: copy(from_fd, from_name, to_fd, to_name, from_sb.st_size);
244: (void)close(from_fd);
245: }
1.2 ! deraadt 246:
! 247: if (dostrip) {
1.1 deraadt 248: strip(to_name);
1.2 ! deraadt 249:
! 250: /*
! 251: * Re-open our fd on the target, in case we used a strip
! 252: * that does not work in-place -- like gnu binutils strip.
! 253: */
! 254: close(to_fd);
! 255: if ((to_fd = open(to_name, O_RDONLY, S_IRUSR | S_IWUSR)) < 0)
! 256: err(1, "stripping %s", to_name);
! 257: }
! 258:
1.1 deraadt 259: /*
260: * Set owner, group, mode for target; do the chown first,
261: * chown may lose the setuid bits.
262: */
263: if ((gid != -1 || uid != -1) && fchown(to_fd, uid, gid)) {
264: serrno = errno;
265: (void)unlink(to_name);
266: errx(1, "%s: chown/chgrp: %s", to_name, strerror(serrno));
267: }
268: if (fchmod(to_fd, mode)) {
269: serrno = errno;
270: (void)unlink(to_name);
271: errx(1, "%s: chmod: %s", to_name, strerror(serrno));
272: }
273:
274: /*
275: * If provided a set of flags, set them, otherwise, preserve the
276: * flags, except for the dump flag.
277: */
278: if (fchflags(to_fd,
279: flags & SETFLAGS ? fset : from_sb.st_flags & ~UF_NODUMP)) {
280: serrno = errno;
281: (void)unlink(to_name);
282: errx(1, "%s: chflags: %s", to_name, strerror(serrno));
283: }
284:
285: (void)close(to_fd);
286: if (!docopy && !devnull && unlink(from_name))
287: err(1, "%s", from_name);
288: }
289:
290: /*
291: * copy --
292: * copy from one file to another
293: */
294: void
295: copy(from_fd, from_name, to_fd, to_name, size)
296: register int from_fd, to_fd;
297: char *from_name, *to_name;
298: off_t size;
299: {
300: register int nr, nw;
301: int serrno;
302: char *p, buf[MAXBSIZE];
303:
304: /*
305: * Mmap and write if less than 8M (the limit is so we don't totally
306: * trash memory on big files. This is really a minor hack, but it
307: * wins some CPU back.
308: */
309: if (size <= 8 * 1048576) {
310: if ((p = mmap(NULL, (size_t)size, PROT_READ,
311: 0, from_fd, (off_t)0)) == (char *)-1)
312: err(1, "%s", from_name);
313: if (write(to_fd, p, size) != size)
314: err(1, "%s", to_name);
315: } else {
316: while ((nr = read(from_fd, buf, sizeof(buf))) > 0)
317: if ((nw = write(to_fd, buf, nr)) != nr) {
318: serrno = errno;
319: (void)unlink(to_name);
320: errx(1, "%s: %s",
321: to_name, strerror(nw > 0 ? EIO : serrno));
322: }
323: if (nr != 0) {
324: serrno = errno;
325: (void)unlink(to_name);
326: errx(1, "%s: %s", from_name, strerror(serrno));
327: }
328: }
329: }
330:
331: /*
332: * strip --
333: * use strip(1) to strip the target file
334: */
335: void
336: strip(to_name)
337: char *to_name;
338: {
339: int serrno, status;
340:
341: switch (vfork()) {
342: case -1:
343: serrno = errno;
344: (void)unlink(to_name);
345: errx(1, "forks: %s", strerror(errno));
346: case 0:
347: execl(_PATH_STRIP, "strip", to_name, NULL);
348: err(1, "%s", _PATH_STRIP);
349: default:
350: if (wait(&status) == -1 || status)
351: (void)unlink(to_name);
352: }
353: }
354:
355: /*
356: * install_dir --
357: * build directory heirarchy
358: */
359: void
360: install_dir(path)
361: char *path;
362: {
363: register char *p;
364: struct stat sb;
365: int ch;
366:
367: for (p = path;; ++p)
368: if (!*p || (p != path && *p == '/')) {
369: ch = *p;
370: *p = '\0';
371: if (stat(path, &sb)) {
372: if (errno != ENOENT || mkdir(path, 0777) < 0) {
373: err(1, "%s", path);
374: /* NOTREACHED */
375: }
376: }
377: if (!(*p = ch))
378: break;
379: }
380:
381: if (((gid != -1 || uid != -1) && chown(path, uid, gid)) ||
382: chmod(path, mode)) {
383: warn("%s", path);
384: }
385: }
386:
387: /*
388: * usage --
389: * print a usage message and die
390: */
391: void
392: usage()
393: {
394: (void)fprintf(stderr, "\
395: usage: install [-cs] [-f flags] [-g group] [-m mode] [-o owner] file1 file2\n\
396: install [-cs] [-f flags] [-g group] [-m mode] [-o owner] file1 ... fileN directory\n\
397: install -d [-g group] [-m mode] [-o owner] directory ...\n");
398: exit(1);
399: }
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