freebsd-dev/usr.sbin/rpc.umntall/mounttab.c
Brian Feldman ab80d6fabc This is another in Martin Blapp's N-series of mount-related cleanups :)
Changes are:
 - rpc.umntall is called at the right places now in /etc/rc*
 - rpc.umntall timeout has been lowered from two days (too high) to one
 - verbose messages in rpc.umntall have been clarified
 - kill double entries in /var/db/mounttab when rpc.umntall is invoked
 - ${early_nfs_mounts} has been removed from /etc/rc
 - patched mount(8) -p to print different pass/dump values for ufs filesystems.
   (last patch recieved from dan <bugg@bugg.strangled.net>)

Submitted by:	Martin Blapp <mbr@imp.ch>, dan <bugg@bugg.strangled.net>
2000-01-15 14:28:14 +00:00

227 lines
5.5 KiB
C

/*
* Copyright (c) 1999 Martin Blapp
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#ifndef lint
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
#include <sys/syslog.h>
#include <rpc/rpc.h>
#include <nfs/rpcv2.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "mounttab.h"
int verbose;
struct mtablist *mtabhead;
/*
* Add an entry to PATH_MOUNTTAB for each mounted NFS filesystem,
* so the client can notify the NFS server even after reboot.
*/
int
add_mtab(char *hostp, char *dirp) {
FILE *mtabfile;
time_t *now;
now = NULL;
if ((mtabfile = fopen(PATH_MOUNTTAB, "a")) == NULL)
return (0);
else {
fprintf(mtabfile, "%ld\t%s\t%s\n", time(now), hostp, dirp);
fclose(mtabfile);
return (1);
}
}
/*
* Read mounttab line for line and return struct mtablist.
*/
int
read_mtab(struct mtablist *mtabp) {
struct mtablist **mtabpp;
char *hostp, *dirp, *cp;
char str[STRSIZ];
char *timep;
time_t time;
FILE *mtabfile;
if ((mtabfile = fopen(PATH_MOUNTTAB, "r")) == NULL) {
if (errno == ENOENT)
return (0);
else {
syslog(LOG_ERR, "can't open %s", PATH_MOUNTTAB);
return (0);
}
}
time = 0;
mtabpp = &mtabhead;
while (fgets(str, STRSIZ, mtabfile) != NULL) {
cp = str;
errno = 0;
if (*cp == '#' || *cp == ' ' || *cp == '\n')
continue;
timep = strsep(&cp, " \t\n");
if (timep == NULL || *timep == ' ' || *timep == '\n') {
badline(timep);
continue;
}
hostp = strsep(&cp, " \t\n");
if (hostp == NULL || *hostp == ' ' || *hostp == '\n') {
badline(hostp);
continue;
}
dirp = strsep(&cp, " \t\n");
if (dirp == NULL || *dirp == ' ' || *dirp == '\n') {
badline(dirp);
continue;
}
time = strtoul(timep, (char **)NULL, 10);
if (errno == ERANGE) {
badline(timep);
continue;
}
if ((mtabp = malloc(sizeof (struct mtablist))) == NULL) {
syslog(LOG_ERR, "malloc");
fclose(mtabfile);
return (0);
}
mtabp->mtab_time = time;
memmove(mtabp->mtab_host, hostp, RPCMNT_NAMELEN);
mtabp->mtab_host[RPCMNT_NAMELEN - 1] = '\0';
memmove(mtabp->mtab_dirp, dirp, RPCMNT_PATHLEN);
mtabp->mtab_dirp[RPCMNT_PATHLEN - 1] = '\0';
mtabp->mtab_next = (struct mtablist *)NULL;
*mtabpp = mtabp;
mtabpp = &mtabp->mtab_next;
}
fclose(mtabfile);
return (1);
}
/*
* Rewrite PATH_MOUNTTAB from scratch and skip bad entries.
* Unlink PATH_MOUNTAB if no entry is left.
*/
int
write_mtab() {
struct mtablist *mtabp;
FILE *mtabfile;
int line;
if ((mtabfile = fopen(PATH_MOUNTTAB, "w")) == NULL) {
syslog(LOG_ERR, "can't write to %s", PATH_MOUNTTAB);
return (0);
}
line = 0;
for (mtabp = mtabhead; mtabp != NULL; mtabp = mtabp->mtab_next) {
if (mtabp->mtab_host != NULL &&
strlen(mtabp->mtab_host) > 0) {
fprintf(mtabfile, "%ld\t%s\t%s\n", mtabp->mtab_time,
mtabp->mtab_host, mtabp->mtab_dirp);
if (verbose) {
warnx("write entry " "%s:%s",
mtabp->mtab_host, mtabp->mtab_dirp);
}
clean_mtab(mtabp->mtab_host, mtabp->mtab_dirp);
line++;
}
}
fclose(mtabfile);
if (line == 0) {
if (unlink(PATH_MOUNTTAB) == -1) {
syslog(LOG_ERR, "can't remove %s", PATH_MOUNTTAB);
return (0);
}
}
return (1);
}
/*
* Mark the entries as clean where RPC calls have been done successfully.
*/
void
clean_mtab(char *hostp, char *dirp) {
struct mtablist *mtabp;
char *host;
host = strdup(hostp);
for (mtabp = mtabhead; mtabp != NULL; mtabp = mtabp->mtab_next) {
if (mtabp->mtab_host != NULL &&
strcmp(mtabp->mtab_host, host) == 0) {
if (dirp == NULL) {
if (verbose) {
warnx("delete entries "
"host %s", host);
}
bzero(mtabp->mtab_host, RPCMNT_NAMELEN);
} else {
if (strcmp(mtabp->mtab_dirp, dirp) == 0) {
if (verbose) {
warnx("delete entry "
"%s:%s", host, dirp);
}
bzero(mtabp->mtab_host, RPCMNT_NAMELEN);
}
}
}
}
free(host);
}
/*
* Free struct mtablist mtab.
*/
void
free_mtab() {
struct mtablist *mtabp;
struct mtablist *mtab_next;
for (mtabp = mtabhead; mtabp != NULL; mtabp = mtab_next) {
mtab_next = mtabp->mtab_next;
free(mtabp);
mtabp = mtab_next;
}
}
/*
* Print bad lines to syslog.
*/
void
badline(char *bad) {
syslog(LOG_ERR, "skip bad line in mounttab with entry %s", bad);
}