Fix a selection of bugs, and improve code layout:
- Remove unnecessary and unused local variables. - Include useful information in error and warning messages. - Fix the logic for expiring mounttab entries. - Remove calls to getaddrinfo - the results were not used. - Simplify some string handling by using snprintf. - Fix usage.
This commit is contained in:
Ian Dowse
parent
605d466b60
commit
d730d3b491
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=80123
@ -59,14 +59,12 @@ struct mtablist *mtabhead;
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int
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main(int argc, char **argv) {
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int ch, keep, success, pathlen;
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time_t expire, *now;
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time_t expire, now;
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char *host, *path;
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struct mtablist *mtab;
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mtab = NULL;
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now = NULL;
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expire = 0;
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host = path = '\0';
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host = path = NULL;
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success = keep = verbose = 0;
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while ((ch = getopt(argc, argv, "h:kp:ve:")) != -1)
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switch (ch) {
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@ -99,68 +97,74 @@ main(int argc, char **argv) {
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/* Default expiretime is one day */
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if (expire == 0)
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expire = 86400;
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/*
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* Read PATH_MOUNTTAB and check each entry
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* and do finally the unmounts.
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*/
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time(&now);
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/* Read PATH_MOUNTTAB. */
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if (!read_mtab(NULL)) {
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if (verbose)
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warnx("no mounttab entries (%s does not exist)",
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PATH_MOUNTTAB);
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mtabhead = NULL;
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}
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if (host == NULL && path == NULL) {
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if (!read_mtab(mtab)) {
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if (verbose)
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warnx("nothing to do, %s does not exist",
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PATH_MOUNTTAB);
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}
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/* Check each entry and do any necessary unmount RPCs. */
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for (mtab = mtabhead; mtab != NULL; mtab = mtab->mtab_next) {
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if (*mtab->mtab_host != '\0' ||
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mtab->mtab_time <= (time(now) - expire)) {
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if (keep && is_mounted(mtab->mtab_host,
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mtab->mtab_dirp)) {
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if (verbose) {
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warnx("skip entry %s:%s",
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mtab->mtab_host,
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mtab->mtab_dirp);
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}
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} else if (do_umount(mtab->mtab_host,
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mtab->mtab_dirp) ||
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mtab->mtab_time <= (time(now) - expire)) {
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clean_mtab(mtab->mtab_host,
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mtab->mtab_dirp);
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}
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if (*mtab->mtab_host == '\0')
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continue;
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if (mtab->mtab_time + expire < now) {
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/* Clear expired entry. */
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if (verbose)
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warnx("remove expired entry %s:%s",
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mtab->mtab_host, mtab->mtab_dirp);
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bzero(mtab->mtab_host,
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sizeof(mtab->mtab_host));
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continue;
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}
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if (keep && is_mounted(mtab->mtab_host,
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mtab->mtab_dirp)) {
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if (verbose)
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warnx("skip entry %s:%s",
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mtab->mtab_host, mtab->mtab_dirp);
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continue;
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}
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if (do_umount(mtab->mtab_host, mtab->mtab_dirp)) {
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if (verbose)
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warnx("umount RPC for %s:%s succeeded",
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mtab->mtab_host, mtab->mtab_dirp);
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/* Remove all entries for this host + path. */
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clean_mtab(mtab->mtab_host, mtab->mtab_dirp);
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}
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}
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/* Only do a RPC UMNTALL for this specific host */
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} else if (host != NULL && path == NULL) {
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if (!do_umntall(host))
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exit(1);
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else
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success = 1;
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/* Someone forgot to enter a hostname */
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} else if (host == NULL && path != NULL)
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usage();
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/* Only do a RPC UMOUNT for this specific mount */
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else {
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for (pathlen = strlen(path);
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pathlen > 1 && path[pathlen - 1] == '/'; pathlen--)
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path[pathlen - 1] = '\0';
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if (!do_umount(host, path))
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exit(1);
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else
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success = 1;
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success = 1;
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} else {
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if (host == NULL && path != NULL)
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/* Missing hostname. */
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usage();
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if (path == NULL) {
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/* Do a RPC UMNTALL for this specific host */
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success = do_umntall(host);
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if (verbose && success)
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warnx("umntall RPC for %s succeeded", host);
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} else {
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/* Do a RPC UMNTALL for this specific mount */
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for (pathlen = strlen(path);
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pathlen > 1 && path[pathlen - 1] == '/'; pathlen--)
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path[pathlen - 1] = '\0';
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success = do_umount(host, path);
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if (verbose && success)
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warnx("umount RPC for %s:%s succeeded", host,
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path);
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}
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/* If successful, remove any corresponding mounttab entries. */
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if (success)
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clean_mtab(host, path);
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}
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/* Write and unlink PATH_MOUNTTAB if necessary */
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if (success) {
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if (verbose)
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warnx("UMOUNT RPC successfully sent to %s", host);
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if (read_mtab(mtab)) {
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mtab = mtabhead;
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clean_mtab(host, path);
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}
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}
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if (!write_mtab()) {
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free_mtab();
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exit(1);
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}
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if (success)
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success = write_mtab();
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free_mtab();
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exit(0);
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exit (success ? 0 : 1);
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}
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/*
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@ -171,22 +175,12 @@ main(int argc, char **argv) {
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int
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do_umntall(char *hostname) {
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enum clnt_stat clnt_stat;
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struct addrinfo *ai, hints;
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struct timeval try;
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int so, ecode;
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CLIENT *clp;
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memset(&hints, 0, sizeof hints);
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hints.ai_flags = AI_NUMERICHOST;
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ecode = getaddrinfo(hostname, NULL, &hints, &ai);
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if (ecode != 0) {
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warnx("can't get net id for host/nfs: %s",
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gai_strerror(ecode));
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return (1);
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}
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clp = clnt_create(hostname, RPCPROG_MNT, RPCMNT_VER1, "udp");
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if (clp == NULL) {
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clnt_pcreateerror("Cannot MNT PRC");
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if (clp == NULL) {
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warnx("%s: %s", hostname, clnt_spcreateerror("RPCPROG_MNT"));
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return (1);
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}
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clp->cl_auth = authunix_create_default();
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@ -194,8 +188,9 @@ do_umntall(char *hostname) {
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try.tv_usec = 0;
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clnt_stat = clnt_call(clp, RPCMNT_UMNTALL, xdr_void, (caddr_t)0,
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xdr_void, (caddr_t)0, try);
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clnt_destroy(clp);
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if (clnt_stat != RPC_SUCCESS) {
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clnt_perror(clp, "Bad MNT RPC");
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warnx("%s: %s", hostname, clnt_sperror(clp, "RPCMNT_UMNTALL"));
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return (0);
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} else
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return (1);
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@ -207,22 +202,12 @@ do_umntall(char *hostname) {
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int
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do_umount(char *hostname, char *dirp) {
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enum clnt_stat clnt_stat;
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struct addrinfo *ai, hints;
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struct timeval try;
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CLIENT *clp;
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int so, ecode;
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memset(&hints, 0, sizeof hints);
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hints.ai_flags = AI_NUMERICHOST;
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ecode = getaddrinfo(hostname, NULL, &hints, &ai);
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if (ecode != 0) {
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warnx("can't get net id for host/nfs: %s",
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gai_strerror(ecode));
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return (1);
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}
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clp = clnt_create(hostname, RPCPROG_MNT, RPCMNT_VER1, "udp");
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if (clp == NULL) {
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clnt_pcreateerror("Cannot MNT PRC");
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warnx("%s: %s", hostname, clnt_spcreateerror("RPCPROG_MNT"));
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return (1);
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}
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clp->cl_auth = authsys_create_default();
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@ -230,8 +215,9 @@ do_umount(char *hostname, char *dirp) {
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try.tv_usec = 0;
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clnt_stat = clnt_call(clp, RPCMNT_UMOUNT, xdr_dir, dirp,
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xdr_void, (caddr_t)0, try);
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clnt_destroy(clp);
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if (clnt_stat != RPC_SUCCESS) {
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clnt_perror(clp, "Bad MNT RPC");
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warnx("%s: %s", hostname, clnt_sperror(clp, "RPCMNT_UMOUNT"));
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return (0);
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}
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return (1);
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@ -244,17 +230,12 @@ int
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is_mounted(char *hostname, char *dirp) {
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struct statfs *mntbuf;
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char name[MNAMELEN + 1];
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size_t bufsize, hostlen, dirlen;
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size_t bufsize;
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int mntsize, i;
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hostlen = strlen(hostname);
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dirlen = strlen(dirp);
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if ((hostlen + dirlen) >= MNAMELEN)
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if (strlen(hostname) + strlen(dirp) >= MNAMELEN)
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return (0);
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memmove(name, hostname, hostlen);
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name[hostlen] = ':';
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memmove(name + hostlen + 1, dirp, dirlen);
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name[hostlen + dirlen + 1] = '\0';
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snprintf(name, sizeof(name), "%s:%s", hostname, dirp);
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mntsize = getfsstat(NULL, 0, MNT_NOWAIT);
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if (mntsize <= 0)
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return (0);
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@ -277,14 +258,12 @@ is_mounted(char *hostname, char *dirp) {
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*/
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int
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xdr_dir(XDR *xdrsp, char *dirp) {
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return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN));
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}
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static void
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usage() {
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(void)fprintf(stderr, "%s\n",
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"usage: rpc.umntall [-h host] [-k] [-p path] [-t expire] [-v]");
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"usage: rpc.umntall [-kv] [-e expire] [-h host] [-p path]");
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exit(1);
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}
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