diff options
Diffstat (limited to 'usr.sbin/rpc.umntall/mounttab.c')
| -rw-r--r-- | usr.sbin/rpc.umntall/mounttab.c | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/usr.sbin/rpc.umntall/mounttab.c b/usr.sbin/rpc.umntall/mounttab.c new file mode 100644 index 0000000..7ebd6e5 --- /dev/null +++ b/usr.sbin/rpc.umntall/mounttab.c @@ -0,0 +1,221 @@ +/* + * 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); + 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("entries deleted for " + "host %s", host); + } + bzero(mtabp->mtab_host, RPCMNT_NAMELEN); + } else { + if (strcmp(mtabp->mtab_dirp, dirp) == 0) { + if (verbose) { + warnx("entry deleted for " + "%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, "skipped bad line in mounttab with entry %s", bad); +} |
