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/*
* imount.c
*
* Copyright (C) 2007, 2008 Red Hat, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include "imount.h"
#include "sundries.h"
#define _(foo) foo
static int mkdirIfNone(char * directory);
int doPwMount(char *dev, char *where, char *fs, char *options) {
int rc, child, status;
char *opts = NULL, *device;
if (mkdirChain(where)) {
return IMOUNT_ERR_ERRNO;
}
if (strstr(fs, "nfs")) {
if (options)
rc = asprintf(&opts, "%s,nolock", options);
else
opts = strdup("nolock");
device = strdup(dev);
} else {
if (*dev != '/')
rc = asprintf(&device, "/dev/%s", dev);
else
device = strdup(dev);
if (options)
opts = strdup(options);
}
if (!(child = fork())) {
int fd;
/* Close off all these filehandles since we don't want errors
* spewed to tty1.
*/
fd = open("/dev/tty5", O_RDONLY);
close(STDIN_FILENO);
dup2(fd, STDIN_FILENO);
close(fd);
fd = open("/dev/tty5", O_WRONLY);
close(STDOUT_FILENO);
dup2(fd, STDOUT_FILENO);
close(STDERR_FILENO);
dup2(fd, STDERR_FILENO);
close(fd);
if (opts) {
rc = execl("/bin/mount",
"/bin/mount", "-n", "-t", fs, "-o", opts, device, where, NULL);
exit(1);
}
else {
rc = execl("/bin/mount", "/bin/mount", "-n", "-t", fs, device, where, NULL);
exit(1);
}
}
waitpid(child, &status, 0);
free(opts);
free(device);
if (!WIFEXITED(status) || (WIFEXITED(status) && WEXITSTATUS(status)))
return IMOUNT_ERR_OTHER;
return 0;
}
int mkdirChain(char * origChain) {
char * chain;
char * chptr;
chain = alloca(strlen(origChain) + 1);
strcpy(chain, origChain);
chptr = chain;
while ((chptr = strchr(chptr, '/'))) {
*chptr = '\0';
if (mkdirIfNone(chain)) {
*chptr = '/';
return IMOUNT_ERR_ERRNO;
}
*chptr = '/';
chptr++;
}
if (mkdirIfNone(chain))
return IMOUNT_ERR_ERRNO;
return 0;
}
static int mkdirIfNone(char * directory) {
int rc, mkerr;
char * chptr;
/* If the file exists it *better* be a directory -- I'm not going to
actually check or anything */
if (!access(directory, X_OK)) return 0;
/* if the path is '/' we get ENOFILE not found" from mkdir, rather
then EEXIST which is weird */
for (chptr = directory; *chptr; chptr++)
if (*chptr != '/') break;
if (!*chptr) return 0;
rc = mkdir(directory, 0755);
mkerr = errno;
if (!rc || mkerr == EEXIST) return 0;
return IMOUNT_ERR_ERRNO;
}
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