2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 1999 Martin Blapp
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
33 #include <sys/syslog.h>
36 #include <rpcsvc/mount.h>
48 struct mtablist *mtabhead;
50 static void badline(const char *field, const char *bad);
53 * Add an entry to PATH_MOUNTTAB for each mounted NFS filesystem,
54 * so the client can notify the NFS server even after reboot.
57 add_mtab(char *hostp, char *dirp)
61 if ((mtabfile = fopen(PATH_MOUNTTAB, "a")) == NULL)
64 fprintf(mtabfile, "%ld\t%s\t%s\n",
65 (long)time(NULL), hostp, dirp);
72 * Read mounttab line for line and return struct mtablist.
77 struct mtablist **mtabpp, *mtabp;
78 char *hostp, *dirp, *cp;
85 if ((mtabfile = fopen(PATH_MOUNTTAB, "r")) == NULL) {
89 syslog(LOG_ERR, "can't open %s", PATH_MOUNTTAB);
95 while (fgets(str, STRSIZ, mtabfile) != NULL) {
98 if (*cp == '#' || *cp == ' ' || *cp == '\n')
100 timep = strsep(&cp, " \t\n");
101 if (timep == NULL || *timep == '\0') {
102 badline("time", timep);
105 hostp = strsep(&cp, " \t\n");
106 if (hostp == NULL || *hostp == '\0') {
107 badline("host", hostp);
110 dirp = strsep(&cp, " \t\n");
111 if (dirp == NULL || *dirp == '\0') {
112 badline("dir", dirp);
115 ultmp = strtoul(timep, &endp, 10);
116 if (ultmp == ULONG_MAX || *endp != '\0') {
117 badline("time", timep);
121 if ((mtabp = malloc(sizeof (struct mtablist))) == NULL) {
122 syslog(LOG_ERR, "malloc");
126 mtabp->mtab_time = actiontime;
127 memmove(mtabp->mtab_host, hostp, MNTNAMLEN);
128 mtabp->mtab_host[MNTNAMLEN - 1] = '\0';
129 memmove(mtabp->mtab_dirp, dirp, MNTPATHLEN);
130 mtabp->mtab_dirp[MNTPATHLEN - 1] = '\0';
131 mtabp->mtab_next = (struct mtablist *)NULL;
133 mtabpp = &mtabp->mtab_next;
140 * Rewrite PATH_MOUNTTAB from scratch and skip bad entries.
141 * Unlink PATH_MOUNTAB if no entry is left.
144 write_mtab(int verbose)
146 struct mtablist *mtabp, *mp;
150 if ((mtabfile = fopen(PATH_MOUNTTAB, "w")) == NULL) {
151 syslog(LOG_ERR, "can't write to %s", PATH_MOUNTTAB);
155 for (mtabp = mtabhead; mtabp != NULL; mtabp = mtabp->mtab_next) {
156 if (mtabp->mtab_host[0] == '\0')
158 /* Skip if a later (hence more recent) entry is identical. */
159 for (mp = mtabp->mtab_next; mp != NULL; mp = mp->mtab_next)
160 if (strcmp(mtabp->mtab_host, mp->mtab_host) == 0 &&
161 strcmp(mtabp->mtab_dirp, mp->mtab_dirp) == 0)
166 fprintf(mtabfile, "%ld\t%s\t%s\n",
167 (long)mtabp->mtab_time, mtabp->mtab_host,
170 warnx("write mounttab entry %s:%s",
171 mtabp->mtab_host, mtabp->mtab_dirp);
176 if (unlink(PATH_MOUNTTAB) == -1) {
177 syslog(LOG_ERR, "can't remove %s", PATH_MOUNTTAB);
185 * Mark the entries as clean where RPC calls have been done successfully.
188 clean_mtab(char *hostp, char *dirp, int verbose)
190 struct mtablist *mtabp;
193 /* Copy hostp in case it points to an entry that we are zeroing out. */
194 host = strdup(hostp);
195 for (mtabp = mtabhead; mtabp != NULL; mtabp = mtabp->mtab_next) {
196 if (strcmp(mtabp->mtab_host, host) != 0)
198 if (dirp != NULL && strcmp(mtabp->mtab_dirp, dirp) != 0)
202 warnx("delete mounttab entry%s %s:%s",
203 (dirp == NULL) ? " by host" : "",
204 mtabp->mtab_host, mtabp->mtab_dirp);
205 bzero(mtabp->mtab_host, MNTNAMLEN);
211 * Free struct mtablist mtab.
216 struct mtablist *mtabp;
218 while ((mtabp = mtabhead) != NULL) {
219 mtabhead = mtabhead->mtab_next;
225 * Print bad lines to syslog.
228 badline(const char *field, const char *bad)
230 syslog(LOG_ERR, "bad mounttab %s field '%s'", field,
231 (bad == NULL) ? "<null>" : bad);