1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
/*
* 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;
if (mkdirChain(where)) {
return IMOUNT_ERR_ERRNO;
}
if (strstr(fs, "nfs")) {
if (options)
rc = asprintf(&opts, "%s,nolock", options);
else
opts = strdup("nolock");
}
else 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/null", O_RDONLY);
close(STDIN_FILENO);
dup2(fd, STDIN_FILENO);
close(fd);
fd = open("/dev/null", 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, dev, where, NULL);
exit(1);
}
else {
rc = execl("/bin/mount", "/bin/mount", "-n", "-t", fs, dev, where, NULL);
exit(1);
}
}
waitpid(child, &status, 0);
free(opts);
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;
}
|
