Annotation of src/usr.bin/lndir/lndir.c, Revision 1.17
1.17 ! jmc 1: /* $OpenBSD: lndir.c,v 1.16 2005/10/04 18:39:57 matthieu Exp $ */
1.1 downsj 2: /* $XConsortium: lndir.c /main/15 1995/08/30 10:56:18 gildea $ */
1.5 ericj 3:
1.15 mickey 4: /*
1.5 ericj 5: * Create shadow link tree (after X11R4 script of the same name)
1.15 mickey 6: * Mark Reinhold (mbr@lcs.mit.edu)/3 January 1990
1.5 ericj 7: */
1.1 downsj 8:
1.15 mickey 9: /*
1.1 downsj 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:
1.15 mickey 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: {
1.13 millert 137: char *s, *ns;
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++) {
1.13 millert 142: if (s[1] == '/') {
143: /* collapse multiple slashes in lname */
144: for (ns = s + 1; *ns == '/'; ns++)
145: ;
146: memmove(s + 1, ns, strlen(ns) + 1);
147: }
1.10 deraadt 148: }
1.13 millert 149: return(strcmp(lname, rname) == 0);
1.1 downsj 150: }
151:
1.5 ericj 152: void
1.10 deraadt 153: addexcept(char *name)
1.1 downsj 154: {
1.10 deraadt 155: struct except *new;
156:
157: new = (struct except *)malloc(sizeof(struct except));
158: if (new == (struct except *)NULL)
1.12 millert 159: err(1, NULL);
1.10 deraadt 160: new->name = strdup(name);
161: if (new->name == (char *)NULL)
1.12 millert 162: err(1, NULL);
1.1 downsj 163:
1.10 deraadt 164: new->next = exceptions;
165: exceptions = new;
1.1 downsj 166: }
167:
168:
1.15 mickey 169: /*
1.5 ericj 170: * Recursively create symbolic links from the current directory to the "from"
171: * directory. Assumes that files described by fs and ts are directories.
172: */
1.10 deraadt 173: #if 0
1.5 ericj 174: char *fn; /* name of "from" directory, either absolute or
1.1 downsj 175: relative to cwd */
1.5 ericj 176: struct stat *fs, *ts; /* stats for the "from" directory and cwd */
177: int rel; /* if true, prepend "../" to fn before using */
1.10 deraadt 178: #endif
179: int
180: dodir(char *fn, struct stat *fs, struct stat *ts, int rel)
1.1 downsj 181: {
1.10 deraadt 182: char buf[MAXPATHLEN + 1], symbuf[MAXPATHLEN + 1], basesym[MAXPATHLEN + 1];
183: int n_dirs, symlen, basesymlen = -1;
184: struct stat sb, sc;
185: struct except *cur;
186: struct dirent *dp;
187: char *ocurdir, *p;
188: DIR *df;
189:
190: if (fs->st_dev == ts->st_dev && fs->st_ino == ts->st_ino) {
1.12 millert 191: warnx("%s: From and to directories are identical!", fn);
1.10 deraadt 192: return(1);
193: }
194:
195: if (rel)
1.13 millert 196: strlcpy(buf, "../", sizeof(buf));
1.10 deraadt 197: else
198: buf[0] = '\0';
1.13 millert 199: strlcat(buf, fn, sizeof(buf));
1.15 mickey 200:
1.10 deraadt 201: if (!(df = opendir(buf))) {
202: warn("%s: Cannot opendir", buf);
203: return(1);
1.3 downsj 204: }
1.1 downsj 205:
1.10 deraadt 206: p = buf + strlen(buf);
207: *p++ = '/';
208: n_dirs = fs->st_nlink;
209: while ((dp = readdir(df))) {
1.16 matthieu 210: if (dp->d_namlen == 0 || dp->d_name[dp->d_namlen - 1] == '~' ||
211: strncmp(dp->d_name, ".#", 2) == 0)
1.1 downsj 212: continue;
1.14 millert 213: for (cur = exceptions; cur != NULL; cur = cur->next) {
214: if (!strcmp(dp->d_name, cur->name))
1.10 deraadt 215: goto next; /* can't continue */
1.1 downsj 216: }
1.13 millert 217: strlcpy(p, dp->d_name, buf + sizeof(buf) - p);
1.10 deraadt 218:
219: if (n_dirs > 0) {
220: if (stat(buf, &sb) < 0) {
221: warn("%s", buf);
222: continue;
223: }
224:
225: if (S_ISDIR(sb.st_mode)) {
226: /* directory */
227: n_dirs--;
228: if (dp->d_name[0] == '.' &&
229: (dp->d_name[1] == '\0' || (dp->d_name[1] == '.' &&
230: dp->d_name[2] == '\0')))
231: continue;
232: if (!strcmp(dp->d_name, "RCS"))
233: continue;
234: if (!strcmp(dp->d_name, "SCCS"))
235: continue;
236: if (!strcmp(dp->d_name, "CVS"))
237: continue;
238: if (!strcmp(dp->d_name, "CVS.adm"))
239: continue;
240: ocurdir = rcurdir;
241: rcurdir = buf;
242: curdir = silent ? buf : NULL;
243: if (!silent)
244: printf("%s:\n", buf);
245: if (stat(dp->d_name, &sc) < 0 && errno == ENOENT) {
246: if (mkdir(dp->d_name, 0777) < 0 ||
247: stat(dp->d_name, &sc) < 0) {
248: warn("%s", dp->d_name);
249: curdir = rcurdir = ocurdir;
250: continue;
251: }
252: }
253: if (readlink(dp->d_name, symbuf,
254: sizeof(symbuf) - 1) >= 0) {
255: fprintf(stderr,
1.15 mickey 256: "%s: is a link instead of a directory\n",
1.10 deraadt 257: dp->d_name);
258: curdir = rcurdir = ocurdir;
259: continue;
260: }
261: if (chdir(dp->d_name) < 0) {
262: warn("%s", dp->d_name);
263: curdir = rcurdir = ocurdir;
264: continue;
265: }
266: dodir(buf, &sb, &sc, (buf[0] != '/'));
267: if (chdir("..") < 0)
268: err(1, "..");
269: curdir = rcurdir = ocurdir;
270: continue;
271: }
1.1 downsj 272: }
1.10 deraadt 273:
274: /* non-directory */
275: symlen = readlink(dp->d_name, symbuf, sizeof(symbuf) - 1);
276: if (symlen >= 0)
277: symbuf[symlen] = '\0';
278:
1.15 mickey 279: /*
1.10 deraadt 280: * The option to ignore links exists mostly because
281: * checking for them slows us down by 10-20%.
282: * But it is off by default because this really is a useful check.
283: */
284: if (!ignore_links) {
285: /* see if the file in the base tree was a symlink */
286: basesymlen = readlink(buf, basesym, sizeof(basesym) - 1);
287: if (basesymlen >= 0)
288: basesym[basesymlen] = '\0';
1.1 downsj 289: }
290:
1.10 deraadt 291: if (symlen >= 0) {
292: /*
293: * Link exists in new tree. Print message if
294: * it doesn't match.
295: */
296: if (!equivalent(basesymlen>=0 ? basesym : buf, symbuf))
297: fprintf(stderr,"%s: %s\n", dp->d_name, symbuf);
298: } else {
299: if (symlink(basesymlen>=0 ? basesym : buf, dp->d_name) < 0)
300: warn("%s", dp->d_name);
301: }
302: next:
1.11 millert 303: ;
1.1 downsj 304: }
305:
1.10 deraadt 306: closedir(df);
307: return(0);
1.1 downsj 308: }
309:
1.5 ericj 310: void
1.10 deraadt 311: usage(void)
1.1 downsj 312: {
1.17 ! jmc 313: (void)fprintf(stderr, "usage: %s [-is] [-e exceptfile] fromdir [todir]\n",
1.10 deraadt 314: __progname);
1.5 ericj 315: exit(1);
1.1 downsj 316: }