Annotation of src/usr.bin/lndir/lndir.c, Revision 1.12
1.12 ! millert 1: /* $OpenBSD: lndir.c,v 1.11 2002/09/23 04:10:14 millert Exp $ */
1.1 downsj 2: /* $XConsortium: lndir.c /main/15 1995/08/30 10:56:18 gildea $ */
1.5 ericj 3:
4: /*
5: * Create shadow link tree (after X11R4 script of the same name)
6: * Mark Reinhold (mbr@lcs.mit.edu)/3 January 1990
7: */
1.1 downsj 8:
9: /*
10: Copyright (c) 1990, X Consortium
11:
12: Permission is hereby granted, free of charge, to any person obtaining a copy
13: of this software and associated documentation files (the "Software"), to deal
14: in the Software without restriction, including without limitation the rights
15: to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
16: copies of the Software, and to permit persons to whom the Software is
17: furnished to do so, subject to the following conditions:
18:
19: The above copyright notice and this permission notice shall be included in
20: all copies or substantial portions of the Software.
21:
22: THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
23: IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
24: FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
25: X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
26: AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
27: CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
28:
29: Except as contained in this notice, the name of the X Consortium shall not be
30: used in advertising or otherwise to promote the sale, use or other dealings
31: in this Software without prior written authorization from the X Consortium.
32:
33: */
34:
35: /* From the original /bin/sh script:
36:
37: Used to create a copy of the a directory tree that has links for all
38: non-directories (except those named RCS, SCCS or CVS.adm). If you are
39: building the distribution on more than one machine, you should use
40: this technique.
41:
42: If your master sources are located in /usr/local/src/X and you would like
43: your link tree to be in /usr/local/src/new-X, do the following:
44:
1.10 deraadt 45: % mkdir /usr/local/src/new-X
1.1 downsj 46: % cd /usr/local/src/new-X
1.10 deraadt 47: % lndir ../X
1.1 downsj 48: */
49:
1.12 ! millert 50: #include <sys/param.h>
1.1 downsj 51: #include <sys/stat.h>
1.12 ! millert 52:
! 53: #include <dirent.h>
1.5 ericj 54: #include <err.h>
1.1 downsj 55: #include <errno.h>
56: #include <stdarg.h>
1.12 ! millert 57: #include <stdio.h>
! 58: #include <stdlib.h>
1.1 downsj 59: #include <string.h>
1.5 ericj 60: #include <unistd.h>
61:
62: extern char *__progname;
1.1 downsj 63:
64: int silent = 0; /* -silent */
65: int ignore_links = 0; /* -ignorelinks */
66:
67: char *rcurdir;
68: char *curdir;
69:
1.7 millert 70: int equivalent(char *, char *);
71: void addexcept(char *);
72: int dodir(char *, struct stat *, struct stat *, int);
73: void usage(void);
1.5 ericj 74:
1.1 downsj 75: struct except {
76: char *name;
77: struct except *next;
78: };
1.5 ericj 79:
1.1 downsj 80: struct except *exceptions = (struct except *)NULL;
81:
1.5 ericj 82: int
1.10 deraadt 83: main(int argc, char *argv[])
1.1 downsj 84: {
1.10 deraadt 85: struct stat fs, ts;
1.6 jasoni 86: char *fn, *tn;
1.5 ericj 87:
1.10 deraadt 88: while (++argv, --argc) {
89: if ((strcmp(*argv, "-silent") == 0) ||
90: (strcmp(*argv, "-s") == 0))
91: silent = 1;
92: else if ((strcmp(*argv, "-ignorelinks") == 0) ||
93: (strcmp(*argv, "-i") == 0))
94: ignore_links = 1;
95: else if (strcmp(*argv, "-e") == 0) {
96: ++argv, --argc;
97:
98: if (argc < 2)
99: usage();
100: addexcept(*argv);
101: } else if (strcmp(*argv, "--") == 0) {
102: ++argv, --argc;
103: break;
104: } else
105: break;
106: }
107:
108: if (argc < 1 || argc > 2)
109: usage();
110:
111: fn = argv[0];
112: if (argc == 2)
113: tn = argv[1];
114: else
115: tn = ".";
116:
117: /* to directory */
118: if (stat(tn, &ts) < 0)
119: err(1, "%s", tn);
120: if (!(S_ISDIR(ts.st_mode)))
121: errx(2, "%s: %s", tn, strerror(ENOTDIR));
122: if (chdir(tn) < 0)
123: err(1, "%s", tn);
124:
125: /* from directory */
126: if (stat(fn, &fs) < 0)
127: err(1, "%s", fn);
128: if (!(S_ISDIR(fs.st_mode)))
129: err(2, "%s: %s", fn, strerror(ENOTDIR));
1.1 downsj 130:
1.10 deraadt 131: exit(dodir(fn, &fs, &ts, 0));
1.1 downsj 132: }
133:
1.5 ericj 134: int
1.10 deraadt 135: equivalent(char *lname, char *rname)
1.1 downsj 136: {
1.10 deraadt 137: char *s;
1.1 downsj 138:
1.12 ! millert 139: if (strcmp(lname, rname) == 0)
1.10 deraadt 140: return(1);
141: for (s = lname; *s && (s = strchr(s, '/')); s++) {
142: while (s[1] == '/')
143: strcpy(s+1, s+2);
144: }
145: return(!strcmp(lname, rname));
1.1 downsj 146: }
147:
1.5 ericj 148: void
1.10 deraadt 149: addexcept(char *name)
1.1 downsj 150: {
1.10 deraadt 151: struct except *new;
152:
153: new = (struct except *)malloc(sizeof(struct except));
154: if (new == (struct except *)NULL)
1.12 ! millert 155: err(1, NULL);
1.10 deraadt 156: new->name = strdup(name);
157: if (new->name == (char *)NULL)
1.12 ! millert 158: err(1, NULL);
1.1 downsj 159:
1.10 deraadt 160: new->next = exceptions;
161: exceptions = new;
1.1 downsj 162: }
163:
164:
1.5 ericj 165: /*
166: * Recursively create symbolic links from the current directory to the "from"
167: * directory. Assumes that files described by fs and ts are directories.
168: */
1.10 deraadt 169: #if 0
1.5 ericj 170: char *fn; /* name of "from" directory, either absolute or
1.1 downsj 171: relative to cwd */
1.5 ericj 172: struct stat *fs, *ts; /* stats for the "from" directory and cwd */
173: int rel; /* if true, prepend "../" to fn before using */
1.10 deraadt 174: #endif
175: int
176: dodir(char *fn, struct stat *fs, struct stat *ts, int rel)
1.1 downsj 177: {
1.10 deraadt 178: char buf[MAXPATHLEN + 1], symbuf[MAXPATHLEN + 1], basesym[MAXPATHLEN + 1];
179: int n_dirs, symlen, basesymlen = -1;
180: struct stat sb, sc;
181: struct except *cur;
182: struct dirent *dp;
183: char *ocurdir, *p;
184: DIR *df;
185:
186: if (fs->st_dev == ts->st_dev && fs->st_ino == ts->st_ino) {
1.12 ! millert 187: warnx("%s: From and to directories are identical!", fn);
1.10 deraadt 188: return(1);
189: }
190:
191: if (rel)
192: strlcpy(buf, "../", sizeof buf);
193: else
194: buf[0] = '\0';
195: strlcat(buf, fn, sizeof buf);
1.1 downsj 196:
1.10 deraadt 197: if (!(df = opendir(buf))) {
198: warn("%s: Cannot opendir", buf);
199: return(1);
1.3 downsj 200: }
1.1 downsj 201:
1.10 deraadt 202: p = buf + strlen(buf);
203: *p++ = '/';
204: n_dirs = fs->st_nlink;
205: while ((dp = readdir(df))) {
206: if (dp->d_name[strlen(dp->d_name) - 1] == '~')
1.1 downsj 207: continue;
1.10 deraadt 208: for (cur = exceptions; cur != (struct except *)NULL;
209: cur = cur->next) {
210: if (!strcmp (dp->d_name, cur->name))
211: goto next; /* can't continue */
1.1 downsj 212: }
1.10 deraadt 213: strcpy(p, dp->d_name);
214:
215: if (n_dirs > 0) {
216: if (stat(buf, &sb) < 0) {
217: warn("%s", buf);
218: continue;
219: }
220:
221: if (S_ISDIR(sb.st_mode)) {
222: /* directory */
223: n_dirs--;
224: if (dp->d_name[0] == '.' &&
225: (dp->d_name[1] == '\0' || (dp->d_name[1] == '.' &&
226: dp->d_name[2] == '\0')))
227: continue;
228: if (!strcmp(dp->d_name, "RCS"))
229: continue;
230: if (!strcmp(dp->d_name, "SCCS"))
231: continue;
232: if (!strcmp(dp->d_name, "CVS"))
233: continue;
234: if (!strcmp(dp->d_name, "CVS.adm"))
235: continue;
236: ocurdir = rcurdir;
237: rcurdir = buf;
238: curdir = silent ? buf : NULL;
239: if (!silent)
240: printf("%s:\n", buf);
241: if (stat(dp->d_name, &sc) < 0 && errno == ENOENT) {
242: if (mkdir(dp->d_name, 0777) < 0 ||
243: stat(dp->d_name, &sc) < 0) {
244: warn("%s", dp->d_name);
245: curdir = rcurdir = ocurdir;
246: continue;
247: }
248: }
249: if (readlink(dp->d_name, symbuf,
250: sizeof(symbuf) - 1) >= 0) {
251: fprintf(stderr,
252: "%s: is a link instead of a directory\n",
253: dp->d_name);
254: curdir = rcurdir = ocurdir;
255: continue;
256: }
257: if (chdir(dp->d_name) < 0) {
258: warn("%s", dp->d_name);
259: curdir = rcurdir = ocurdir;
260: continue;
261: }
262: dodir(buf, &sb, &sc, (buf[0] != '/'));
263: if (chdir("..") < 0)
264: err(1, "..");
265: curdir = rcurdir = ocurdir;
266: continue;
267: }
1.1 downsj 268: }
1.10 deraadt 269:
270: /* non-directory */
271: symlen = readlink(dp->d_name, symbuf, sizeof(symbuf) - 1);
272: if (symlen >= 0)
273: symbuf[symlen] = '\0';
274:
275: /*
276: * The option to ignore links exists mostly because
277: * checking for them slows us down by 10-20%.
278: * But it is off by default because this really is a useful check.
279: */
280: if (!ignore_links) {
281: /* see if the file in the base tree was a symlink */
282: basesymlen = readlink(buf, basesym, sizeof(basesym) - 1);
283: if (basesymlen >= 0)
284: basesym[basesymlen] = '\0';
1.1 downsj 285: }
286:
1.10 deraadt 287: if (symlen >= 0) {
288: /*
289: * Link exists in new tree. Print message if
290: * it doesn't match.
291: */
292: if (!equivalent(basesymlen>=0 ? basesym : buf, symbuf))
293: fprintf(stderr,"%s: %s\n", dp->d_name, symbuf);
294: } else {
295: if (symlink(basesymlen>=0 ? basesym : buf, dp->d_name) < 0)
296: warn("%s", dp->d_name);
297: }
298: next:
1.11 millert 299: ;
1.1 downsj 300: }
301:
1.10 deraadt 302: closedir(df);
303: return(0);
1.1 downsj 304: }
305:
1.5 ericj 306: void
1.10 deraadt 307: usage(void)
1.1 downsj 308: {
1.12 ! millert 309: (void)fprintf(stderr, "usage: %s [-e except] [-si] fromdir [todir]\n",
1.10 deraadt 310: __progname);
1.5 ericj 311: exit(1);
1.1 downsj 312: }
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