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
|
/*
* by rmk
*/
#include <sys/mount.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "mount_opts.h"
char *progname;
static struct extra_opts extra;
static unsigned long rwflag;
static int
do_mount(char *dev, char *dir, char *type, unsigned long rwflag, void *data)
{
char *s;
int error = 0;
while ((s = strsep(&type, ",")) != NULL) {
retry:
if (mount(dev, dir, s, rwflag, data) == -1) {
error = errno;
/*
* If the filesystem is not found, or the
* superblock is invalid, try the next.
*/
if (error == ENODEV || error == EINVAL)
continue;
/*
* If we get EACCESS, and we're trying to
* mount readwrite and this isn't a remount,
* try read only.
*/
if (error == EACCES &&
(rwflag & (MS_REMOUNT | MS_RDONLY)) == 0) {
rwflag |= MS_RDONLY;
goto retry;
}
} else {
error = 0;
}
break;
}
if (error) {
errno = error;
perror("mount");
return 255;
}
return 0;
}
int main(int argc, char *argv[])
{
char *type = NULL;
int c;
progname = argv[0];
rwflag = MS_VERBOSE;
do {
c = getopt(argc, argv, "no:rt:wfi");
if (c == EOF)
break;
switch (c) {
case 'n':
/* no mtab writing */
break;
case 'o':
rwflag = parse_mount_options(optarg, rwflag, &extra);
break;
case 'r':
rwflag |= MS_RDONLY;
break;
case 't':
type = optarg;
break;
case 'w':
rwflag &= ~MS_RDONLY;
break;
case 'f':
/* we can't edit /etc/mtab yet anyway; exit */
exit(0);
case 'i':
/* ignore for now; no support for mount helpers */
break;
case '?':
fprintf(stderr, "%s: invalid option -%c\n",
progname, optopt);
exit(1);
}
} while (1);
/*
* If remount, bind or move was specified, then we don't
* have a "type" as such. Use the dummy "none" type.
*/
if (rwflag & MS_TYPE)
type = "none";
if (optind + 2 != argc || type == NULL) {
fprintf(stderr, "Usage: %s [-r] [-w] [-o options] [-t type] [-f] [-i] "
"[-n] device directory\n", progname);
exit(1);
}
return do_mount(argv[optind], argv[optind + 1], type, rwflag,
extra.str);
}
|
