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/*
* mount.c - mount devices
*
* Copyright (c) 2007 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* 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.
*
*/
/**
* @file
* @brief Filesystem mounting support
*/
#include <common.h>
#include <command.h>
#include <fs.h>
#include <errno.h>
#include <getopt.h>
#include <linux/err.h>
static int do_mount(int argc, char *argv[])
{
int opt, verbose = 0;
struct driver_d *drv;
const char *type = NULL;
const char *mountpoint, *dev;
const char *fsoptions = NULL;
while ((opt = getopt(argc, argv, "ao:t:v")) > 0) {
switch (opt) {
case 'a':
mount_all();
break;
case 't':
type = optarg;
break;
case 'o':
fsoptions = optarg;
break;
case 'v':
verbose++;
break;
}
}
if (argc == optind) {
struct fs_device_d *fsdev;
for_each_fs_device(fsdev) {
printf("%s on %s type %s\n",
fsdev->backingstore ? fsdev->backingstore : "none",
fsdev->path,
fsdev->dev.name);
}
if (verbose) {
printf("\nSupported filesystems:\n\n");
bus_for_each_driver(&fs_bus, drv) {
struct fs_driver_d * fsdrv = drv_to_fs_driver(drv);
printf("%s\n", fsdrv->drv.name);
}
}
return 0;
}
if (argc == optind + 1) {
struct cdev *cdev;
const char *path, *devstr;
devstr = argv[optind];
if (!strncmp(devstr, "/dev/", 5))
devstr += 5;
cdev = cdev_by_name(devstr);
if (!cdev)
return -ENOENT;
path = cdev_mount_default(cdev, fsoptions);
if (IS_ERR(path))
return PTR_ERR(path);
printf("mounted /dev/%s on %s\n", devstr, path);
return 0;
}
if (argc < optind + 2)
return COMMAND_ERROR_USAGE;
dev = argv[optind];
if (argc == optind + 3) {
/*
* Old behaviour: mount <dev> <type> <mountpoint>
*/
type = argv[optind + 1];
mountpoint = argv[optind + 2];
} else {
mountpoint = argv[optind + 1];
}
return mount(dev, type, mountpoint, fsoptions);
}
BAREBOX_CMD_HELP_START(mount)
BAREBOX_CMD_HELP_USAGE("mount [[OPTIONS] <device> [mountpoint]]\n")
BAREBOX_CMD_HELP_OPT("-t <type>", "specify filesystem type\n")
BAREBOX_CMD_HELP_OPT("-a", "Mount all blockdevices.\n")
BAREBOX_CMD_HELP_OPT("-v", "be more verbose\n")
BAREBOX_CMD_HELP_SHORT("Mount a filesystem of a given type to a mountpoint.\n")
BAREBOX_CMD_HELP_SHORT("If no fstype is specified, try to detect it automatically.\n")
BAREBOX_CMD_HELP_SHORT("If no argument is given, list mounted filesystems.\n")
BAREBOX_CMD_HELP_SHORT("With -a the mount command mounts all block devices whose filesystem\n")
BAREBOX_CMD_HELP_SHORT("can be detected automatically to /mnt/<partname>\n")
BAREBOX_CMD_HELP_SHORT("If mountpoint is not given a standard mountpoint of /mnt/devname>\n")
BAREBOX_CMD_HELP_SHORT("is used. This directoy is created automatically if necessary.\n")
BAREBOX_CMD_HELP_END
/**
* @page mount_command
<ul>
<li>\<device> can be a device in /dev or some arbitrary string if no
device is needed for this driver, i.e. on ramfs. </li>
<li>\<fstype> is the filesystem driver. A list of available drivers can
be shown with the \ref devinfo_command command.</li>
<li>\<mountpoint> must be an empty directory, one level below the /
directory.</li>
</ul>
*/
/**
* @page how_mount_works How mount works in barebox
Mounting a filesystem ontop of a device is working like devices and
drivers are finding together.
The mount command creates a new device with the filesystem name as the
driver for this "device". So the framework is able to merge both parts
together.
By the way: With this feature its impossible to accidentely remove
partitions in use. A partition is internally also a device. If its
mounted it will be marked as busy, so an delpart command fails, until
the filesystem has been unmounted.
*/
BAREBOX_CMD_START(mount)
.cmd = do_mount,
.usage = "Mount a filesystem of a given type to a mountpoint or list mounted filesystems.",
BAREBOX_CMD_HELP(cmd_mount_help)
BAREBOX_CMD_END
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