config/nsinstall.c

   1 /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5 /*
   6 ** Netscape portable install command.
   7 **
   8 ** Brendan Eich, 7/20/95
   9 */
  10 #include <stdio.h> /* OSF/1 requires this before grp.h, so put it first */
  11 #include <assert.h>
  12 #include <fcntl.h>
  13 #include <errno.h>
  14 #include <dirent.h>
  15 #include <limits.h>
  16 #include <grp.h>
  17 #include <pwd.h>
  18 #include <stdio.h>
  19 #include <stdlib.h>
  20 #include <string.h>
  21 #include <unistd.h>
  22 #include <utime.h>
  23 #include <sys/types.h>
  24 #include <sys/stat.h>
  25 #include "pathsub.h"
  26
  27 #ifdef HAVE_GETOPT_H
  28 #  include <getopt.h>
  29 #endif
  30
  31 #ifdef SUNOS4
  32 #  include "sunos4.h"
  33 #endif
  34
  35 #ifdef NEXTSTEP
  36 #  include <bsd/libc.h>
  37 #endif
  38
  39 #ifdef __QNX__
  40 #  include <unix.h>
  41 #endif
  42
  43 #ifdef NEED_S_ISLNK
  44 #  if !defined(S_ISLNK) && defined(S_IFLNK)
  45 #    define S_ISLNK(a) (((a) & S_IFMT) == S_IFLNK)
  46 #  endif
  47 #endif
  48
  49 #ifndef _DIRECTORY_SEPARATOR
  50 #  define _DIRECTORY_SEPARATOR "/"
  51 #endif /* _DIRECTORY_SEPARATOR */
  52
  53 #ifdef NEED_FCHMOD_PROTO
  54 extern int fchmod(int fildes, mode_t mode);
  55 #endif
  56
  57 static void usage(void) {
  58   fprintf(stderr,
  59           "usage: %s [-C cwd] [-L linkprefix] [-m mode] [-o owner] [-g group]\n"
  60           "       %*s [-DdltR] file [file ...] directory\n",
  61           program, (int)strlen(program), "");
  62   exit(2);
  63 }
  64
  65 static int mkdirs(char* path, mode_t mode) {
  66   char* cp;
  67   struct stat sb;
  68   int res;
  69   int l;
  70
  71   /* strip trailing "/." */
  72   l = strlen(path);
  73   if (l > 1 && path[l - 1] == '.' && path[l - 2] == '/') path[l - 2] = 0;
  74
  75   while (*path == '/' && path[1] == '/') path++;
  76   for (cp = strrchr(path, '/'); cp && cp != path && *(cp - 1) == '/'; cp--);
  77   if (cp && cp != path) {
  78     *cp = '\0';
  79     if ((lstat(path, &sb) < 0 || !S_ISDIR(sb.st_mode)) &&
  80         mkdirs(path, mode) < 0) {
  81       return -1;
  82     }
  83     *cp = '/';
  84   }
  85
  86   res = mkdir(path, mode);
  87   if ((res != 0) && (errno == EEXIST))
  88     return 0;
  89   else
  90     return res;
  91 }
  92
  93 static uid_t touid(char* owner) {
  94   struct passwd* pw;
  95   uid_t uid;
  96   char* cp;
  97
  98   pw = getpwnam(owner);
  99   if (pw) return pw->pw_uid;
 100   uid = strtol(owner, &cp, 0);
 101   if (uid == 0 && cp == owner) fail("cannot find uid for %s", owner);
 102   return uid;
 103 }
 104
 105 static gid_t togid(char* group) {
 106   struct group* gr;
 107   gid_t gid;
 108   char* cp;
 109
 110   gr = getgrnam(group);
 111   if (gr) return gr->gr_gid;
 112   gid = strtol(group, &cp, 0);
 113   if (gid == 0 && cp == group) fail("cannot find gid for %s", group);
 114   return gid;
 115 }
 116
 117 static void copyfile(char* name, char* toname, mode_t mode, char* group,
 118                      char* owner, int dotimes, uid_t uid, gid_t gid) {
 119   int fromfd, tofd = -1, cc, wc, exists;
 120   char buf[BUFSIZ], *bp;
 121   struct stat sb, tosb;
 122   struct utimbuf utb;
 123
 124   exists = (lstat(toname, &tosb) == 0);
 125
 126   fromfd = open(name, O_RDONLY);
 127   if (fromfd < 0 || fstat(fromfd, &sb) < 0) fail("cannot access %s", name);
 128   if (exists) {
 129     if (S_ISREG(tosb.st_mode)) {
 130       /* See if we can open it. This is more reliable than 'access'. */
 131       tofd = open(toname, O_CREAT | O_WRONLY, 0666);
 132     }
 133     if (tofd < 0) {
 134       (void)(S_ISDIR(tosb.st_mode) ? rmdir : unlink)(toname);
 135     }
 136   }
 137   if (tofd < 0) {
 138     tofd = open(toname, O_CREAT | O_WRONLY, 0666);
 139     if (tofd < 0) fail("cannot create %s", toname);
 140   }
 141
 142   bp = buf;
 143   while ((cc = read(fromfd, bp, sizeof buf)) > 0) {
 144     while ((wc = write(tofd, bp, (unsigned int)cc)) > 0) {
 145       if ((cc -= wc) == 0) break;
 146       bp += wc;
 147     }
 148     if (wc < 0) fail("cannot write to %s", toname);
 149   }
 150   if (cc < 0) fail("cannot read from %s", name);
 151
 152   if (ftruncate(tofd, sb.st_size) < 0) fail("cannot truncate %s", toname);
 153 #if !defined(VMS)
 154   if (dotimes) {
 155     utb.actime = sb.st_atime;
 156     utb.modtime = sb.st_mtime;
 157     if (utime(toname, &utb) < 0) fail("cannot set times of %s", toname);
 158   }
 159 #  ifdef HAVE_FCHMOD
 160   if (fchmod(tofd, mode) < 0)
 161 #  else
 162   if (chmod(toname, mode) < 0)
 163 #  endif
 164     fail("cannot change mode of %s", toname);
 165 #endif
 166   if ((owner || group) && fchown(tofd, uid, gid) < 0)
 167     fail("cannot change owner of %s", toname);
 168
 169   /* Must check for delayed (NFS) write errors on close. */
 170   if (close(tofd) < 0) fail("cannot write to %s", toname);
 171   close(fromfd);
 172 #if defined(VMS)
 173   if (chmod(toname, (mode & (S_IREAD | S_IWRITE))) < 0)
 174     fail("cannot change mode of %s", toname);
 175   if (dotimes) {
 176     utb.actime = sb.st_atime;
 177     utb.modtime = sb.st_mtime;
 178     if (utime(toname, &utb) < 0) fail("cannot set times of %s", toname);
 179   }
 180 #endif
 181 }
 182
 183 static void copydir(char* from, char* to, mode_t mode, char* group, char* owner,
 184                     int dotimes, uid_t uid, gid_t gid) {
 185   DIR* dir;
 186   struct dirent* ep;
 187   struct stat sb;
 188   char *base, *destdir, *direntry, *destentry;
 189
 190   base = xbasename(from);
 191
 192   /* create destination directory */
 193   destdir = xmalloc((unsigned int)(strlen(to) + 1 + strlen(base) + 1));
 194   sprintf(destdir, "%s%s%s", to, _DIRECTORY_SEPARATOR, base);
 195   if (mkdirs(destdir, mode) != 0) {
 196     fail("cannot make directory %s\n", destdir);
 197     free(destdir);
 198     return;
 199   }
 200
 201   if (!(dir = opendir(from))) {
 202     fail("cannot open directory %s\n", from);
 203     free(destdir);
 204     return;
 205   }
 206
 207   direntry = xmalloc((unsigned int)PATH_MAX);
 208   destentry = xmalloc((unsigned int)PATH_MAX);
 209
 210   while ((ep = readdir(dir))) {
 211     if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0) continue;
 212
 213     sprintf(direntry, "%s/%s", from, ep->d_name);
 214     sprintf(destentry, "%s%s%s", destdir, _DIRECTORY_SEPARATOR, ep->d_name);
 215
 216     if (stat(direntry, &sb) == 0 && S_ISDIR(sb.st_mode))
 217       copydir(direntry, destdir, mode, group, owner, dotimes, uid, gid);
 218     else
 219       copyfile(direntry, destentry, mode, group, owner, dotimes, uid, gid);
 220   }
 221
 222   free(destdir);
 223   free(direntry);
 224   free(destentry);
 225   closedir(dir);
 226 }
 227
 228 int main(int argc, char** argv) {
 229   int onlydir, dodir, dolink, dorelsymlink, dotimes, opt, len, lplen, tdlen,
 230       bnlen, exists;
 231   mode_t mode = 0755;
 232   char *linkprefix, *owner, *group, *cp, *cwd, *todir, *toname, *name, *base,
 233       *linkname, buf[BUFSIZ];
 234   uid_t uid;
 235   gid_t gid;
 236   struct stat sb, tosb, fromsb;
 237
 238   program = argv[0];
 239   cwd = linkname = linkprefix = owner = group = 0;
 240   onlydir = dodir = dolink = dorelsymlink = dotimes = lplen = 0;
 241
 242   while ((opt = getopt(argc, argv, "C:DdlL:Rm:o:g:t")) != EOF) {
 243     switch (opt) {
 244       case 'C':
 245         cwd = optarg;
 246         break;
 247       case 'D':
 248         onlydir = 1;
 249         break;
 250       case 'd':
 251         dodir = 1;
 252         break;
 253       case 'L':
 254         linkprefix = optarg;
 255         lplen = strlen(linkprefix);
 256         dolink = 1;
 257         break;
 258       case 'R':
 259         dolink = dorelsymlink = 1;
 260         break;
 261       case 'm':
 262         mode = strtoul(optarg, &cp, 8);
 263         if (mode == 0 && cp == optarg) usage();
 264         break;
 265       case 'o':
 266         owner = optarg;
 267         break;
 268       case 'g':
 269         group = optarg;
 270         break;
 271       case 't':
 272         dotimes = 1;
 273         break;
 274       default:
 275         usage();
 276     }
 277   }
 278
 279   argc -= optind;
 280   argv += optind;
 281   if (argc < 2 - onlydir) usage();
 282
 283   todir = argv[argc - 1];
 284   if ((stat(todir, &sb) < 0 || !S_ISDIR(sb.st_mode)) &&
 285       mkdirs(todir, 0777) < 0) {
 286     fail("cannot make directory %s", todir);
 287   }
 288   if (onlydir) return 0;
 289
 290   if (!cwd) {
 291 #ifndef NEEDS_GETCWD
 292 #  ifndef GETCWD_CANT_MALLOC
 293     cwd = getcwd(0, PATH_MAX);
 294 #  else
 295     cwd = malloc(PATH_MAX + 1);
 296     cwd = getcwd(cwd, PATH_MAX);
 297 #  endif
 298 #else
 299     cwd = malloc(PATH_MAX + 1);
 300     cwd = getwd(cwd);
 301 #endif
 302   }
 303
 304   xchdir(todir);
 305 #ifndef NEEDS_GETCWD
 306 #  ifndef GETCWD_CANT_MALLOC
 307   todir = getcwd(0, PATH_MAX);
 308 #  else
 309   todir = malloc(PATH_MAX + 1);
 310   todir = getcwd(todir, PATH_MAX);
 311 #  endif
 312 #else
 313   todir = malloc(PATH_MAX + 1);
 314   todir = getwd(todir);
 315 #endif
 316   tdlen = strlen(todir);
 317   xchdir(cwd);
 318   tdlen = strlen(todir);
 319
 320   uid = owner ? touid(owner) : (uid_t)(-1);
 321   gid = group ? togid(group) : (gid_t)(-1);
 322
 323   while (--argc > 0) {
 324     name = *argv++;
 325     len = strlen(name);
 326     base = xbasename(name);
 327     bnlen = strlen(base);
 328     toname = xmalloc((unsigned int)(tdlen + 1 + bnlen + 1));
 329     sprintf(toname, "%s%s%s", todir, _DIRECTORY_SEPARATOR, base);
 330     exists = (lstat(toname, &tosb) == 0);
 331
 332     if (dodir) {
 333       /* -d means create a directory, always */
 334       if (exists && !S_ISDIR(tosb.st_mode)) {
 335         (void)unlink(toname);
 336         exists = 0;
 337       }
 338       if (!exists && mkdir(toname, mode) < 0)
 339         fail("cannot make directory %s", toname);
 340       if ((owner || group) && chown(toname, uid, gid) < 0)
 341         fail("cannot change owner of %s", toname);
 342     } else if (dolink) {
 343       if (access(name, R_OK) != 0) {
 344         fail("cannot access %s", name);
 345       }
 346       if (*name == '/') {
 347         /* source is absolute pathname, link to it directly */
 348         linkname = 0;
 349       } else {
 350         if (linkprefix) {
 351           /* -L prefixes names with a $cwd arg. */
 352           len += lplen + 1;
 353           linkname = xmalloc((unsigned int)(len + 1));
 354           sprintf(linkname, "%s/%s", linkprefix, name);
 355         } else if (dorelsymlink) {
 356           /* Symlink the relative path from todir to source name. */
 357           linkname = xmalloc(PATH_MAX);
 358
 359           if (*todir == '/') {
 360             /* todir is absolute: skip over common prefix. */
 361             lplen = relatepaths(todir, cwd, linkname);
 362             strcpy(linkname + lplen, name);
 363           } else {
 364             /* todir is named by a relative path: reverse it. */
 365             reversepath(todir, name, len, linkname);
 366             xchdir(cwd);
 367           }
 368
 369           len = strlen(linkname);
 370         }
 371         name = linkname;
 372       }
 373
 374       /* Check for a pre-existing symlink with identical content. */
 375       if (exists &&
 376           (!S_ISLNK(tosb.st_mode) || readlink(toname, buf, sizeof buf) != len ||
 377            strncmp(buf, name, (unsigned int)len) != 0 ||
 378            ((stat(name, &fromsb) == 0) && (fromsb.st_mtime > tosb.st_mtime)))) {
 379         (void)(S_ISDIR(tosb.st_mode) ? rmdir : unlink)(toname);
 380         exists = 0;
 381       }
 382       if (!exists && symlink(name, toname) < 0)
 383         fail("cannot make symbolic link %s", toname);
 384 #ifdef HAVE_LCHOWN
 385       if ((owner || group) && lchown(toname, uid, gid) < 0)
 386         fail("cannot change owner of %s", toname);
 387 #endif
 388
 389       if (linkname) {
 390         free(linkname);
 391         linkname = 0;
 392       }
 393     } else {
 394       /* Copy from name to toname, which might be the same file. */
 395       if (stat(name, &sb) == 0 && S_IFDIR & sb.st_mode) {
 396         /* then is directory: must explicitly create destination dir  */
 397         /*  and manually copy files over                              */
 398         copydir(name, todir, mode, group, owner, dotimes, uid, gid);
 399       } else {
 400         copyfile(name, toname, mode, group, owner, dotimes, uid, gid);
 401       }
 402     }
 403
 404     free(toname);
 405   }
 406
 407   free(cwd);
 408   free(todir);
 409   return 0;
 410 }