setupfiles.c revision 7b0bedd42192a2f6bcd6fc4b637d23892303a962
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7b0bedd42192a2f6bcd6fc4b637d23892303a962Ric Aleshire * Copyright 2010 Sun Microsystems, Inc. All rights reserved.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * Use is subject to license terms.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica#define dprintf(s, v) if (flags & DBUG) (void) printf(s, v)
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica#define dprintf2(s, v1, v2) if (flags & DBUG) (void) printf(s, v1, v2)
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01ricastatic int mkdirs(const char *dir, const char *target, int flags);
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01ricastatic int copyfile(const char *min_home, const char *home, const char *target,
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01ricastatic int linkfile(const char *min_home, const char *home, const char *target,
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * __setupfiles - Process copy and link files directions in min $HOME.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * Entry pwd = user's password file entry.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * min_sl = user's minimum SL.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * flags = DBUG, if print debug messages.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * DIAG, if print diagnostics (perrors).
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * IGNE, continue rather than abort on failures.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * REPC, if replace existing file.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * REPL, if replace existing symbolic link.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * process is running as user at correct label.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * Exit None.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * Returns 0, if success.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * errno, if failure.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * Uses COPY, CP, LINK, MAXPATHLEN.
7b0bedd42192a2f6bcd6fc4b637d23892303a962Ric Aleshire * Calls blequal, copyfile, feof, fgets, fopen,
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * mkdirs, getzoneid, getzonelabelbyid, linkfile, strcat, strcpy,
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * This program assumes the /zone is the autofs mountpoint for
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * cross-zone mounts.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * It also assumes that the user's home directory path is the
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * the same in each zone, relative to the zone's root.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * At this point, the cross-zone automounter only supports home
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * directories starting with /home
7b0bedd42192a2f6bcd6fc4b637d23892303a962Ric Aleshire__setupfiles(const struct passwd *pwd, const m_label_t *min_sl, int flags)
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica char home[MAXPATHLEN]; /* real path to current $HOME */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica char min_home[MAXPATHLEN]; /* real path to min $HOME */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica char cl_file[MAXPATHLEN]; /* real path to .copy/.link_files */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica /* at min SL no files to setup */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica return (0);
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica /* get current home real path */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica /* Get zone id from min_sl */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * Since the global zone home directories aren't public
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * information, we don't support copy and link files there.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica return (0);
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * Get zone root path from zone id
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * Could have used getzonenamebyid() but this assumes that /etc/zones
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * directory is available, which is not true in labeled zones
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica dperror("setupfiles can't get zone root path for min sl");
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica /* process copy files */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica if ((strlen(min_home) + strlen(COPY)) > (MAXPATHLEN - 1)) {
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica /* make any needed subdirectories */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica /* copy the file */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica } /* while (fgets( ... ) != NULL) */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica } /* process copy files */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica /* process link files */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica if ((strlen(min_home) + strlen(LINK)) > (MAXPATHLEN - 1)) {
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica /* make any needed subdirectories */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica /* link the file */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica } /* while (fgets ... ) != NULL) */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica } /* process link files */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica return (0);
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica} /* setupfiles() */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * mkdirs - Make any needed subdirectories in target's path.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * Entry home = base directory.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * file = file to create with intermediate subdirectories.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * flags = from __setupfiles -- for dprintf and dperror.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * Exit Needed subdirectories made.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * Returns 0, if success.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * errno, if failure.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * Uses MAXPATHLEN.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * Calls mkdir, strcat, strcpy, strlen, strtok.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica if ((strlen(home) + strlen(file)) > (MAXPATHLEN - 2)) {
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica return (0);
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica *tok = '\000'; /* drop last component, it's the target */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica dprintf("setupfiles dir %s made or already exists\n", path);
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica return (0);
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica} /* mkdirs() */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * copyfile - Copy a file from the base home directory to the current.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * Entry min_home = from home directory.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * home = current (to) home directory.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * target = file to copy.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * flags = from __setupfiles.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * REPC, if replace existing file.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * Exit File copied.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * Returns 0, if success.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * errno, if failure.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * Uses CP, MAXPATHLEN.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * Calls access, execlp, exit, lstat, strcat, strcpy, strlen, unlink,
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * vfork, waitpid.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01ricacopyfile(const char *min_home, const char *home, const char *target, int flags)
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica /* prepare target */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica if (snprintf(dest, sizeof (dest), "%s/%s", home, target) >
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica /* target exists */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica /* unlink and replace */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica /* target exists and is not to be replaced */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica return (0);
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica /* error on target */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica /* prepare source */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica if (snprintf(src, sizeof (src), "%s/%s", min_home, target) >
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica /* can't access source */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica /* attempt the copy */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica if ((child = vfork()) != 0) { /* parent, wait for child status */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica (void) waitpid(child, &status, 0); /* wait for child */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica dprintf("setupfiles copy child returned %x\n", status);
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica /* execute "cp -p min_home home" */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica /* can't execute cp */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica return (0);
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica} /* copyfile() */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * linkfile - Make a symlink from the the current directory to the base
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * home directory.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * Entry min_home = from home directory.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * home = current (to) home directory.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * target = file to copy.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * flags = from __setupfiles.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * REPL, if replace existing symlink.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * Exit File symlinked.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * Returns 0, if success.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * errno, if failure.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * Uses MAXPATHLEN.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica * Calls lstat, symlink, strcat, strcpy, strlen, unlink.
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01ricalinkfile(const char *min_home, const char *home, const char *target, int flags)
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica /* prepare target */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica if (snprintf(dest, sizeof (dest), "%s/%s", home, target) >
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica /* target exists */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica /* unlink and replace */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica /* target exists and is not to be replaced */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica return (0);
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica /* error on target */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica if (snprintf(src, sizeof (src), "%s/%s", min_home, target) >
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica /* attempt the copy */
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica return (0);
f875b4ebb1dd9fdbeb043557cab38ab3bf7f6e01rica} /* linkfile */