Annotation of src/usr.bin/lndir/lndir.c, Revision 1.8
1.8 ! form 1: /* $OpenBSD: lndir.c,v 1.7 2002/02/16 21:27:47 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:
45: % mkdir /usr/local/src/new-X
46: % cd /usr/local/src/new-X
47: % lndir ../X
48: */
49:
50: #include <stdio.h>
1.4 niklas 51: #include <stdlib.h>
1.1 downsj 52: #include <sys/types.h>
53: #include <sys/stat.h>
54: #include <sys/param.h>
1.5 ericj 55: #include <err.h>
1.1 downsj 56: #include <errno.h>
57: #include <dirent.h>
58: #include <stdarg.h>
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
83: main (argc, argv)
84: int argc;
85: char **argv;
1.1 downsj 86: {
1.6 jasoni 87: char *fn, *tn;
1.5 ericj 88: struct stat fs, ts;
89:
90: while (++argv, --argc) {
91: if ((strcmp(*argv, "-silent") == 0)
92: || (strcmp(*argv, "-s") == 0))
93: silent = 1;
94: else if ((strcmp(*argv, "-ignorelinks") == 0)
95: || (strcmp(*argv, "-i") == 0))
96: ignore_links = 1;
97: else if (strcmp(*argv, "-e") == 0) {
98: ++argv, --argc;
99:
100: if (argc < 2)
101: usage();
102: addexcept(*argv);
103: } else if (strcmp(*argv, "--") == 0) {
104: ++argv, --argc;
105: break;
106: } else
107: break;
108: }
109:
110:
111: if (argc < 1 || argc > 2)
112: usage();
113:
114: fn = argv[0];
115: if (argc == 2)
116: tn = argv[1];
117: else
118: tn = ".";
1.1 downsj 119:
1.5 ericj 120: /* to directory */
121: if (stat(tn, &ts) < 0)
1.8 ! form 122: err(1, "%s", tn);
1.5 ericj 123: if (!(S_ISDIR(ts.st_mode)))
1.8 ! form 124: errx(2, "%s: %s", tn, strerror(ENOTDIR));
1.5 ericj 125: if (chdir(tn) < 0)
1.8 ! form 126: err(1, "%s", tn);
1.1 downsj 127:
1.5 ericj 128: /* from directory */
129: if (stat(fn, &fs) < 0)
1.8 ! form 130: err(1, "%s", fn);
1.5 ericj 131: if (!(S_ISDIR(fs.st_mode)))
1.8 ! form 132: err(2, "%s: %s", fn, strerror(ENOTDIR));
1.1 downsj 133:
1.5 ericj 134: exit(dodir (fn, &fs, &ts, 0));
1.1 downsj 135: }
136:
1.5 ericj 137: int
138: equivalent(lname, rname)
1.1 downsj 139: char *lname;
140: char *rname;
141: {
142: char *s;
143:
144: if (!strcmp(lname, rname))
1.5 ericj 145: return(1);
1.1 downsj 146: for (s = lname; *s && (s = strchr(s, '/')); s++) {
147: while (s[1] == '/')
148: strcpy(s+1, s+2);
149: }
1.5 ericj 150: return(!strcmp(lname, rname));
1.1 downsj 151: }
152:
1.5 ericj 153: void
1.1 downsj 154: addexcept(name)
155: char *name;
156: {
157: struct except *new;
158:
159: new = (struct except *)malloc(sizeof(struct except));
160: if (new == (struct except *)NULL)
1.8 ! form 161: err(1, "addexcept");
1.1 downsj 162: new->name = strdup(name);
163: if (new->name == (char *)NULL)
1.8 ! form 164: err(1, "addexcept");
1.1 downsj 165:
166: new->next = exceptions;
167: exceptions = new;
168: }
169:
170:
1.5 ericj 171: /*
172: * Recursively create symbolic links from the current directory to the "from"
173: * directory. Assumes that files described by fs and ts are directories.
174: */
175: int
176: dodir(fn, fs, ts, rel)
177: char *fn; /* name of "from" directory, either absolute or
1.1 downsj 178: relative to cwd */
1.5 ericj 179: struct stat *fs, *ts; /* stats for the "from" directory and cwd */
180: int rel; /* if true, prepend "../" to fn before using */
1.1 downsj 181: {
182: DIR *df;
183: struct dirent *dp;
184: char buf[MAXPATHLEN + 1], *p;
185: char symbuf[MAXPATHLEN + 1];
186: char basesym[MAXPATHLEN + 1];
187: struct stat sb, sc;
188: int n_dirs;
189: int symlen;
190: int basesymlen = -1;
191: char *ocurdir;
192: struct except *cur;
193:
194: if ((fs->st_dev == ts->st_dev) && (fs->st_ino == ts->st_ino)) {
1.5 ericj 195: warn("%s: From and to directories are identical!", fn);
196: return(1);
1.1 downsj 197: }
198:
199: if (rel)
1.5 ericj 200: strcpy(buf, "../");
1.1 downsj 201: else
202: buf[0] = '\0';
1.5 ericj 203: strcat(buf, fn);
1.1 downsj 204:
1.5 ericj 205: if (!(df = opendir(buf))) {
206: warn("%s: Cannot opendir", buf);
207: return(1);
1.1 downsj 208: }
209:
1.5 ericj 210: p = buf + strlen(buf);
1.1 downsj 211: *p++ = '/';
212: n_dirs = fs->st_nlink;
1.5 ericj 213: while ((dp = readdir(df))) {
1.1 downsj 214: if (dp->d_name[strlen(dp->d_name) - 1] == '~')
215: continue;
1.3 downsj 216: for (cur = exceptions; cur != (struct except *)NULL;
217: cur = cur->next) {
218: if (!strcmp (dp->d_name, cur->name))
219: goto next; /* can't continue */
220: }
1.5 ericj 221: strcpy(p, dp->d_name);
1.1 downsj 222:
223: if (n_dirs > 0) {
1.5 ericj 224: if (stat(buf, &sb) < 0) {
225: warn("%s", buf);
1.1 downsj 226: continue;
227: }
228:
1.5 ericj 229: if (S_ISDIR(sb.st_mode)) {
1.1 downsj 230: /* directory */
231: n_dirs--;
232: if (dp->d_name[0] == '.' &&
233: (dp->d_name[1] == '\0' || (dp->d_name[1] == '.' &&
234: dp->d_name[2] == '\0')))
235: continue;
1.5 ericj 236: if (!strcmp(dp->d_name, "RCS"))
1.1 downsj 237: continue;
1.5 ericj 238: if (!strcmp(dp->d_name, "SCCS"))
1.1 downsj 239: continue;
1.5 ericj 240: if (!strcmp(dp->d_name, "CVS"))
1.1 downsj 241: continue;
1.5 ericj 242: if (!strcmp(dp->d_name, "CVS.adm"))
1.1 downsj 243: continue;
244: ocurdir = rcurdir;
245: rcurdir = buf;
1.5 ericj 246: curdir = silent ? buf : NULL;
1.1 downsj 247: if (!silent)
1.5 ericj 248: printf("%s:\n", buf);
249: if ((stat(dp->d_name, &sc) < 0) && (errno == ENOENT)) {
250: if (mkdir(dp->d_name, 0777) < 0 ||
251: stat(dp->d_name, &sc) < 0) {
252: warn("%s", dp->d_name);
1.1 downsj 253: curdir = rcurdir = ocurdir;
254: continue;
255: }
256: }
1.5 ericj 257: if (readlink(dp->d_name, symbuf, sizeof(symbuf) - 1) >= 0) {
258: (void)fprintf(stderr, "%s: is a link instead of a directory\n",
259: dp->d_name);
1.1 downsj 260: curdir = rcurdir = ocurdir;
261: continue;
262: }
1.5 ericj 263: if (chdir(dp->d_name) < 0) {
264: warn("%s", dp->d_name);
1.1 downsj 265: curdir = rcurdir = ocurdir;
266: continue;
267: }
1.5 ericj 268: dodir(buf, &sb, &sc, (buf[0] != '/'));
1.1 downsj 269: if (chdir ("..") < 0)
1.8 ! form 270: err (1, "..");
1.1 downsj 271: curdir = rcurdir = ocurdir;
272: continue;
273: }
274: }
275:
276: /* non-directory */
1.5 ericj 277: symlen = readlink(dp->d_name, symbuf, sizeof(symbuf) - 1);
1.1 downsj 278: if (symlen >= 0)
279: symbuf[symlen] = '\0';
280:
1.5 ericj 281: /*
282: * The option to ignore links exists mostly because
283: * checking for them slows us down by 10-20%.
284: * But it is off by default because this really is a useful check.
285: */
1.1 downsj 286: if (!ignore_links) {
287: /* see if the file in the base tree was a symlink */
288: basesymlen = readlink(buf, basesym, sizeof(basesym) - 1);
289: if (basesymlen >= 0)
290: basesym[basesymlen] = '\0';
291: }
292:
293: if (symlen >= 0) {
294: /* Link exists in new tree. Print message if it doesn't match. */
1.5 ericj 295: if (!equivalent(basesymlen>=0 ? basesym : buf, symbuf))
296: (void)fprintf(stderr,"%s: %s\n", dp->d_name, symbuf);
1.1 downsj 297: } else {
1.5 ericj 298: if (symlink(basesymlen>=0 ? basesym : buf, dp->d_name) < 0)
299: warn("%s", dp->d_name);
1.1 downsj 300: }
301: next:
302: }
303:
1.5 ericj 304: closedir(df);
305: return(0);
1.1 downsj 306: }
307:
1.5 ericj 308: void
309: usage()
1.1 downsj 310: {
1.5 ericj 311: (void)fprintf(stderr, "usage: %s [-e except] [-si] fromdir todir\n",
312: __progname);
313: exit(1);
1.1 downsj 314: }
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