usr/utils/mount_main.c

/*
 * 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;
			}
			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, "o:rt:w");
		if (c == EOF)
			break;
		switch (c) {
		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 '?':
			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] "
			"device directory\n", progname);
		exit(1);
	}

	return do_mount(argv[optind], argv[optind + 1], type, rwflag,
			extra.str);
}
1	/*
2	* by rmk
3	*/
4	#include <sys/mount.h>
5	#include <errno.h>
6	#include <stdio.h>
7	#include <stdlib.h>
8	#include <string.h>
9	#include <unistd.h>
10
11	#include "mount_opts.h"
12
13	char *progname;
14
15	static struct extra_opts extra;
16	static unsigned long rwflag;
17
18	static int
19	do_mount(char dev, char dir, char type, unsigned long rwflag, void data)
20	{
21	char *s;
22	int error = 0;
23
24	while ((s = strsep(&type, ",")) != NULL) {
25	retry:
26	if (mount(dev, dir, s, rwflag, data) == -1) {
27	error = errno;
28	/*
29	* If the filesystem is not found, or the
30	* superblock is invalid, try the next.
31	*/
32	if (error == ENODEV \|\| error == EINVAL)
33	continue;
34
35	/*
36	* If we get EACCESS, and we're trying to
37	* mount readwrite and this isn't a remount,
38	* try read only.
39	*/
40	if (error == EACCES &&
41	(rwflag & (MS_REMOUNT \| MS_RDONLY)) == 0) {
42	rwflag \|= MS_RDONLY;
43	goto retry;
44	}
45	break;
46	}
47	}
48
49	if (error) {
50	errno = error;
51	perror("mount");
52	return 255;
53	}
54
55	return 0;
56	}
57
58	int main(int argc, char *argv[])
59	{
60	char *type = NULL;
61	int c;
62
63	progname = argv[0];
64	rwflag = MS_VERBOSE;
65
66	do {
67	c = getopt(argc, argv, "o:rt:w");
68	if (c == EOF)
69	break;
70	switch (c) {
71	case 'o':
72	rwflag = parse_mount_options(optarg, rwflag, &extra);
73	break;
74	case 'r':
75	rwflag \|= MS_RDONLY;
76	break;
77	case 't':
78	type = optarg;
79	break;
80	case 'w':
81	rwflag &= ~MS_RDONLY;
82	break;
83	case '?':
84	fprintf(stderr, "%s: invalid option -%c\n",
85	progname, optopt);
86	exit(1);
87	}
88	} while (1);
89
90	/*
91	* If remount, bind or move was specified, then we don't
92	* have a "type" as such. Use the dummy "none" type.
93	*/
94	if (rwflag & MS_TYPE)
95	type = "none";
96
97	if (optind + 2 != argc \|\| type == NULL) {
98	fprintf(stderr, "Usage: %s [-r] [-w] [-o options] [-t type] "
99	"device directory\n", progname);
100	exit(1);
101	}
102
103	return do_mount(argv[optind], argv[optind + 1], type, rwflag,
104	extra.str);
105	}