1 /* $OpenBSD: lndir.c,v 1.6 2001/07/04 04:56:15 jasoni Exp $ */ 2 /* $XConsortium: lndir.c /main/15 1995/08/30 10:56:18 gildea $ */ 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 */ 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> 51 #include <stdlib.h> 52 #include <sys/types.h> 53 #include <sys/stat.h> 54 #include <sys/param.h> 55 #include <err.h> 56 #include <errno.h> 57 #include <dirent.h> 58 #include <stdarg.h> 59 #include <string.h> 60 #include <unistd.h> 61 62 extern char *__progname; 63 64 int silent = 0; /* -silent */ 65 int ignore_links = 0; /* -ignorelinks */ 66 67 char *rcurdir; 68 char *curdir; 69 70 int equivalent __P((char *, char *)); 71 void addexcept __P((char *)); 72 int dodir __P((char *, struct stat *, struct stat *, int)); 73 void usage __P((void)); 74 75 struct except { 76 char *name; 77 struct except *next; 78 }; 79 80 struct except *exceptions = (struct except *)NULL; 81 82 int 83 main (argc, argv) 84 int argc; 85 char **argv; 86 { 87 char *fn, *tn; 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 = "."; 119 120 /* to directory */ 121 if (stat(tn, &ts) < 0) 122 errx(1, "%s", tn); 123 if (!(S_ISDIR(ts.st_mode))) 124 errx(2, "%s: Not a directory", tn); 125 if (chdir(tn) < 0) 126 errx(1, "%s", tn); 127 128 /* from directory */ 129 if (stat(fn, &fs) < 0) 130 errx(1, "%s", fn); 131 if (!(S_ISDIR(fs.st_mode))) 132 errx(2, "%s: Not a directory", fn); 133 134 exit(dodir (fn, &fs, &ts, 0)); 135 } 136 137 int 138 equivalent(lname, rname) 139 char *lname; 140 char *rname; 141 { 142 char *s; 143 144 if (!strcmp(lname, rname)) 145 return(1); 146 for (s = lname; *s && (s = strchr(s, '/')); s++) { 147 while (s[1] == '/') 148 strcpy(s+1, s+2); 149 } 150 return(!strcmp(lname, rname)); 151 } 152 153 void 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) 161 errx(1, "addexcept"); 162 new->name = strdup(name); 163 if (new->name == (char *)NULL) 164 errx(1, "addexcept"); 165 166 new->next = exceptions; 167 exceptions = new; 168 } 169 170 171 /* 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 178 relative to cwd */ 179 struct stat *fs, *ts; /* stats for the "from" directory and cwd */ 180 int rel; /* if true, prepend "../" to fn before using */ 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)) { 195 warn("%s: From and to directories are identical!", fn); 196 return(1); 197 } 198 199 if (rel) 200 strcpy(buf, "../"); 201 else 202 buf[0] = '\0'; 203 strcat(buf, fn); 204 205 if (!(df = opendir(buf))) { 206 warn("%s: Cannot opendir", buf); 207 return(1); 208 } 209 210 p = buf + strlen(buf); 211 *p++ = '/'; 212 n_dirs = fs->st_nlink; 213 while ((dp = readdir(df))) { 214 if (dp->d_name[strlen(dp->d_name) - 1] == '~') 215 continue; 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 } 221 strcpy(p, dp->d_name); 222 223 if (n_dirs > 0) { 224 if (stat(buf, &sb) < 0) { 225 warn("%s", buf); 226 continue; 227 } 228 229 if (S_ISDIR(sb.st_mode)) { 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; 236 if (!strcmp(dp->d_name, "RCS")) 237 continue; 238 if (!strcmp(dp->d_name, "SCCS")) 239 continue; 240 if (!strcmp(dp->d_name, "CVS")) 241 continue; 242 if (!strcmp(dp->d_name, "CVS.adm")) 243 continue; 244 ocurdir = rcurdir; 245 rcurdir = buf; 246 curdir = silent ? buf : NULL; 247 if (!silent) 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); 253 curdir = rcurdir = ocurdir; 254 continue; 255 } 256 } 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); 260 curdir = rcurdir = ocurdir; 261 continue; 262 } 263 if (chdir(dp->d_name) < 0) { 264 warn("%s", dp->d_name); 265 curdir = rcurdir = ocurdir; 266 continue; 267 } 268 dodir(buf, &sb, &sc, (buf[0] != '/')); 269 if (chdir ("..") < 0) 270 errx (1, ".."); 271 curdir = rcurdir = ocurdir; 272 continue; 273 } 274 } 275 276 /* non-directory */ 277 symlen = readlink(dp->d_name, symbuf, sizeof(symbuf) - 1); 278 if (symlen >= 0) 279 symbuf[symlen] = '\0'; 280 281 /* 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 */ 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. */ 295 if (!equivalent(basesymlen>=0 ? basesym : buf, symbuf)) 296 (void)fprintf(stderr,"%s: %s\n", dp->d_name, symbuf); 297 } else { 298 if (symlink(basesymlen>=0 ? basesym : buf, dp->d_name) < 0) 299 warn("%s", dp->d_name); 300 } 301 next: 302 } 303 304 closedir(df); 305 return(0); 306 } 307 308 void 309 usage() 310 { 311 (void)fprintf(stderr, "usage: %s [-e except] [-si] fromdir todir\n", 312 __progname); 313 exit(1); 314 } 315