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
  58 usage(void)
  59 {
  60     fprintf(stderr,
  61         "usage: %s [-C cwd] [-L linkprefix] [-m mode] [-o owner] [-g group]\n"
  62         "       %*s [-DdltR] file [file ...] directory\n",
  63         program, (int) strlen(program), "");
  64     exit(2);
  65 }
  66
  67 static int
  68 mkdirs(char *path, mode_t mode)
  69 {
  70     char *cp;
  71     struct stat sb;
  72     int res;
  73     int l;
  74
  75     /* strip trailing "/." */
  76     l = strlen(path);
  77     if(l > 1 && path[l - 1] == '.' && path[l - 2] == '/')
  78         path[l - 2] = 0;
  79
  80     while (*path == '/' && path[1] == '/')
  81         path++;
  82     for (cp = strrchr(path, '/'); cp && cp != path && *(cp - 1) == '/'; cp--);
  83     if (cp && cp != path) {
  84         *cp = '\0';
  85         if ((lstat(path, &sb) < 0 || !S_ISDIR(sb.st_mode)) &&
  86             mkdirs(path, mode) < 0) {
  87             return -1;
  88         }
  89         *cp = '/';
  90     }
  91
  92     res = mkdir(path, mode);
  93     if ((res != 0) && (errno == EEXIST))
  94       return 0;
  95     else
  96       return res;
  97 }
  98
  99 static uid_t
 100 touid(char *owner)
 101 {
 102     struct passwd *pw;
 103     uid_t uid;
 104     char *cp;
 105
 106     pw = getpwnam(owner);
 107     if (pw)
 108         return pw->pw_uid;
 109     uid = strtol(owner, &cp, 0);
 110     if (uid == 0 && cp == owner)
 111         fail("cannot find uid for %s", owner);
 112     return uid;
 113 }
 114
 115 static gid_t
 116 togid(char *group)
 117 {
 118     struct group *gr;
 119     gid_t gid;
 120     char *cp;
 121
 122     gr = getgrnam(group);
 123     if (gr)
 124         return gr->gr_gid;
 125     gid = strtol(group, &cp, 0);
 126     if (gid == 0 && cp == group)
 127         fail("cannot find gid for %s", group);
 128     return gid;
 129 }
 130
 131 static void
 132 copyfile( char *name, char *toname, mode_t mode, char *group, char *owner,
 133           int dotimes, uid_t uid, gid_t gid )
 134 {
 135   int fromfd, tofd = -1, cc, wc, exists;
 136   char buf[BUFSIZ], *bp;
 137   struct stat sb, tosb;
 138   struct utimbuf utb;
 139
 140   exists = (lstat(toname, &tosb) == 0);
 141
 142   fromfd = open(name, O_RDONLY);
 143   if (fromfd < 0 || fstat(fromfd, &sb) < 0)
 144     fail("cannot access %s", name);
 145   if (exists) {
 146     if (S_ISREG(tosb.st_mode)) {
 147       /* See if we can open it. This is more reliable than 'access'. */
 148       tofd = open(toname, O_CREAT | O_WRONLY, 0666);
 149     }
 150     if (tofd < 0) {
 151       (void) (S_ISDIR(tosb.st_mode) ? rmdir : unlink)(toname);
 152     }
 153   }
 154   if (tofd < 0) {
 155     tofd = open(toname, O_CREAT | O_WRONLY, 0666);
 156     if (tofd < 0)
 157       fail("cannot create %s", toname);
 158   }
 159
 160   bp = buf;
 161   while ((cc = read(fromfd, bp, sizeof buf)) > 0)
 162   {
 163     while ((wc = write(tofd, bp, (unsigned int)cc)) > 0)
 164     {
 165       if ((cc -= wc) == 0)
 166         break;
 167       bp += wc;
 168     }
 169     if (wc < 0)
 170       fail("cannot write to %s", toname);
 171   }
 172   if (cc < 0)
 173     fail("cannot read from %s", name);
 174
 175   if (ftruncate(tofd, sb.st_size) < 0)
 176     fail("cannot truncate %s", toname);
 177 #if !defined(VMS)
 178   if (dotimes)
 179   {
 180     utb.actime = sb.st_atime;
 181     utb.modtime = sb.st_mtime;
 182     if (utime(toname, &utb) < 0)
 183       fail("cannot set times of %s", toname);
 184   }
 185 #ifdef HAVE_FCHMOD
 186   if (fchmod(tofd, mode) < 0)
 187 #else
 188   if (chmod(toname, mode) < 0)
 189 #endif
 190     fail("cannot change mode of %s", toname);
 191 #endif
 192   if ((owner || group) && fchown(tofd, uid, gid) < 0)
 193     fail("cannot change owner of %s", toname);
 194
 195   /* Must check for delayed (NFS) write errors on close. */
 196   if (close(tofd) < 0)
 197     fail("cannot write to %s", toname);
 198   close(fromfd);
 199 #if defined(VMS)
 200   if (chmod(toname, (mode & (S_IREAD | S_IWRITE))) < 0)
 201     fail("cannot change mode of %s", toname);
 202   if (dotimes)
 203   {
 204     utb.actime = sb.st_atime;
 205     utb.modtime = sb.st_mtime;
 206     if (utime(toname, &utb) < 0)
 207       fail("cannot set times of %s", toname);
 208   }
 209 #endif
 210 }
 211
 212 static void
 213 copydir( char *from, char *to, mode_t mode, char *group, char *owner,
 214          int dotimes, uid_t uid, gid_t gid)
 215 {
 216   DIR *dir;
 217   struct dirent *ep;
 218   struct stat sb;
 219   char *base, *destdir, *direntry, *destentry;
 220
 221   base = xbasename(from);
 222
 223   /* create destination directory */
 224   destdir = xmalloc((unsigned int)(strlen(to) + 1 + strlen(base) + 1));
 225   sprintf(destdir, "%s%s%s", to, _DIRECTORY_SEPARATOR, base);
 226   if (mkdirs(destdir, mode) != 0) {
 227     fail("cannot make directory %s\n", destdir);
 228     free(destdir);
 229     return;
 230   }
 231
 232   if (!(dir = opendir(from))) {
 233     fail("cannot open directory %s\n", from);
 234     free(destdir);
 235     return;
 236   }
 237
 238   direntry = xmalloc((unsigned int)PATH_MAX);
 239   destentry = xmalloc((unsigned int)PATH_MAX);
 240
 241   while ((ep = readdir(dir)))
 242   {
 243     if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0)
 244       continue;
 245
 246     sprintf(direntry, "%s/%s", from, ep->d_name);
 247     sprintf(destentry, "%s%s%s", destdir, _DIRECTORY_SEPARATOR, ep->d_name);
 248
 249     if (stat(direntry, &sb) == 0 && S_ISDIR(sb.st_mode))
 250       copydir( direntry, destdir, mode, group, owner, dotimes, uid, gid );
 251     else
 252       copyfile( direntry, destentry, mode, group, owner, dotimes, uid, gid );
 253   }
 254
 255   free(destdir);
 256   free(direntry);
 257   free(destentry);
 258   closedir(dir);
 259 }
 260
 261 int
 262 main(int argc, char **argv)
 263 {
 264     int onlydir, dodir, dolink, dorelsymlink, dotimes, opt, len, lplen, tdlen, bnlen, exists;
 265     mode_t mode = 0755;
 266     char *linkprefix, *owner, *group, *cp, *cwd, *todir, *toname, *name, *base, *linkname, buf[BUFSIZ];
 267     uid_t uid;
 268     gid_t gid;
 269     struct stat sb, tosb, fromsb;
 270
 271     program = argv[0];
 272     cwd = linkname = linkprefix = owner = group = 0;
 273     onlydir = dodir = dolink = dorelsymlink = dotimes = lplen = 0;
 274
 275     while ((opt = getopt(argc, argv, "C:DdlL:Rm:o:g:t")) != EOF) {
 276         switch (opt) {
 277           case 'C':
 278             cwd = optarg;
 279             break;
 280           case 'D':
 281             onlydir = 1;
 282             break;
 283           case 'd':
 284             dodir = 1;
 285             break;
 286           case 'L':
 287             linkprefix = optarg;
 288             lplen = strlen(linkprefix);
 289             dolink = 1;
 290             break;
 291           case 'R':
 292             dolink = dorelsymlink = 1;
 293             break;
 294           case 'm':
 295             mode = strtoul(optarg, &cp, 8);
 296             if (mode == 0 && cp == optarg)
 297                 usage();
 298             break;
 299           case 'o':
 300             owner = optarg;
 301             break;
 302           case 'g':
 303             group = optarg;
 304             break;
 305           case 't':
 306             dotimes = 1;
 307             break;
 308           default:
 309             usage();
 310         }
 311     }
 312
 313     argc -= optind;
 314     argv += optind;
 315     if (argc < 2 - onlydir)
 316         usage();
 317
 318     todir = argv[argc-1];
 319     if ((stat(todir, &sb) < 0 || !S_ISDIR(sb.st_mode)) &&
 320         mkdirs(todir, 0777) < 0) {
 321         fail("cannot make directory %s", todir);
 322     }
 323     if (onlydir)
 324         return 0;
 325
 326     if (!cwd) {
 327 #ifndef NEEDS_GETCWD
 328 #ifndef GETCWD_CANT_MALLOC
 329         cwd = getcwd(0, PATH_MAX);
 330 #else
 331         cwd = malloc(PATH_MAX + 1);
 332         cwd = getcwd(cwd, PATH_MAX);
 333 #endif
 334 #else
 335         cwd = malloc(PATH_MAX + 1);
 336         cwd = getwd(cwd);
 337 #endif
 338     }
 339
 340     xchdir(todir);
 341 #ifndef NEEDS_GETCWD
 342 #ifndef GETCWD_CANT_MALLOC
 343     todir = getcwd(0, PATH_MAX);
 344 #else
 345     todir = malloc(PATH_MAX + 1);
 346     todir = getcwd(todir, PATH_MAX);
 347 #endif
 348 #else
 349     todir = malloc(PATH_MAX + 1);
 350     todir = getwd(todir);
 351 #endif
 352     tdlen = strlen(todir);
 353     xchdir(cwd);
 354     tdlen = strlen(todir);
 355
 356     uid = owner ? touid(owner) : (uid_t)(-1);
 357     gid = group ? togid(group) : (gid_t)(-1);
 358
 359     while (--argc > 0) {
 360         name = *argv++;
 361         len = strlen(name);
 362         base = xbasename(name);
 363         bnlen = strlen(base);
 364         toname = xmalloc((unsigned int)(tdlen + 1 + bnlen + 1));
 365         sprintf(toname, "%s%s%s", todir, _DIRECTORY_SEPARATOR, base);
 366         exists = (lstat(toname, &tosb) == 0);
 367
 368         if (dodir) {
 369             /* -d means create a directory, always */
 370             if (exists && !S_ISDIR(tosb.st_mode)) {
 371                 (void) unlink(toname);
 372                 exists = 0;
 373             }
 374             if (!exists && mkdir(toname, mode) < 0)
 375                 fail("cannot make directory %s", toname);
 376             if ((owner || group) && chown(toname, uid, gid) < 0)
 377                 fail("cannot change owner of %s", toname);
 378         } else if (dolink) {
 379             if (access(name, R_OK) != 0) {
 380                 fail("cannot access %s", name);
 381             }
 382             if (*name == '/') {
 383                 /* source is absolute pathname, link to it directly */
 384                 linkname = 0;
 385             } else {
 386                 if (linkprefix) {
 387                     /* -L prefixes names with a $cwd arg. */
 388                     len += lplen + 1;
 389                     linkname = xmalloc((unsigned int)(len + 1));
 390                     sprintf(linkname, "%s/%s", linkprefix, name);
 391                 } else if (dorelsymlink) {
 392                     /* Symlink the relative path from todir to source name. */
 393                     linkname = xmalloc(PATH_MAX);
 394
 395                     if (*todir == '/') {
 396                         /* todir is absolute: skip over common prefix. */
 397                         lplen = relatepaths(todir, cwd, linkname);
 398                         strcpy(linkname + lplen, name);
 399                     } else {
 400                         /* todir is named by a relative path: reverse it. */
 401                         reversepath(todir, name, len, linkname);
 402                         xchdir(cwd);
 403                     }
 404
 405                     len = strlen(linkname);
 406                 }
 407                 name = linkname;
 408             }
 409
 410             /* Check for a pre-existing symlink with identical content. */
 411             if (exists && (!S_ISLNK(tosb.st_mode) ||
 412                                                 readlink(toname, buf, sizeof buf) != len ||
 413                                                 strncmp(buf, name, (unsigned int)len) != 0 ||
 414                         ((stat(name, &fromsb) == 0) &&
 415                          (fromsb.st_mtime > tosb.st_mtime)
 416                          ))) {
 417                 (void) (S_ISDIR(tosb.st_mode) ? rmdir : unlink)(toname);
 418                 exists = 0;
 419             }
 420             if (!exists && symlink(name, toname) < 0)
 421                 fail("cannot make symbolic link %s", toname);
 422 #ifdef HAVE_LCHOWN
 423             if ((owner || group) && lchown(toname, uid, gid) < 0)
 424                 fail("cannot change owner of %s", toname);
 425 #endif
 426
 427             if (linkname) {
 428                 free(linkname);
 429                 linkname = 0;
 430             }
 431         } else {
 432             /* Copy from name to toname, which might be the same file. */
 433       if( stat(name, &sb) == 0 && S_IFDIR & sb.st_mode )
 434       {
 435         /* then is directory: must explicitly create destination dir  */
 436         /*  and manually copy files over                              */
 437         copydir( name, todir, mode, group, owner, dotimes, uid, gid );
 438       }
 439       else
 440       {
 441         copyfile(name, toname, mode, group, owner, dotimes, uid, gid);
 442       }
 443     }
 444
 445         free(toname);
 446     }
 447
 448     free(cwd);
 449     free(todir);
 450     return 0;
 451 }