122 lines
3.1 KiB
C
122 lines
3.1 KiB
C
/*
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* mount.c - mount devices
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*
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* Copyright (c) 2007 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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/**
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* @file
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* @brief Filesystem mounting support
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*/
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#include <common.h>
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#include <command.h>
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#include <fs.h>
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#include <errno.h>
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#include <getopt.h>
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static int do_mount(int argc, char *argv[])
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{
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int opt;
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int ret = 0;
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struct fs_device_d *fsdev;
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const char *type = NULL;
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const char *mountpoint, *dev;
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if (argc == 1) {
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for_each_fs_device(fsdev) {
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printf("%s on %s type %s\n",
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fsdev->parent_device ? dev_name(fsdev->parent_device) : "none",
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fsdev->path,
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fsdev->dev.name);
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}
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return 0;
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}
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while ((opt = getopt(argc, argv, "t:")) > 0) {
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switch (opt) {
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case 't':
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type = optarg;
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break;
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}
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}
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if (argc < optind + 2)
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return COMMAND_ERROR_USAGE;
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dev = argv[optind];
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if (argc == optind + 3) {
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/*
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* Old behaviour: mount <dev> <type> <mountpoint>
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*/
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type = argv[optind + 1];
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mountpoint = argv[optind + 2];
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} else {
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mountpoint = argv[optind + 1];
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}
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if ((ret = mount(dev, type, mountpoint))) {
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perror("mount");
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return 1;
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}
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return 0;
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}
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BAREBOX_CMD_HELP_START(mount)
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BAREBOX_CMD_HELP_USAGE("mount [[-t <fstype] <device> <mountpoint>]\n")
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BAREBOX_CMD_HELP_SHORT("Mount a filesystem of a given type to a mountpoint.\n")
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BAREBOX_CMD_HELP_SHORT("If no fstype is specified, try to detect it automatically.\n")
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BAREBOX_CMD_HELP_SHORT("If no argument is given, list mounted filesystems.\n")
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BAREBOX_CMD_HELP_END
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/**
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* @page mount_command
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<ul>
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<li>\<device> can be a device in /dev or some arbitrary string if no
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device is needed for this driver, i.e. on ramfs. </li>
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<li>\<fstype> is the filesystem driver. A list of available drivers can
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be shown with the \ref devinfo_command command.</li>
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<li>\<mountpoint> must be an empty directory, one level below the /
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directory.</li>
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</ul>
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*/
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/**
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* @page how_mount_works How mount works in barebox
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Mounting a filesystem ontop of a device is working like devices and
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drivers are finding together.
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The mount command creates a new device with the filesystem name as the
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driver for this "device". So the framework is able to merge both parts
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together.
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By the way: With this feature its impossible to accidentely remove
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partitions in use. A partition is internally also a device. If its
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mounted it will be marked as busy, so an delpart command fails, until
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the filesystem has been unmounted.
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*/
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BAREBOX_CMD_START(mount)
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.cmd = do_mount,
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.usage = "Mount a filesystem of a given type to a mountpoint or list mounted filesystems.",
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BAREBOX_CMD_HELP(cmd_mount_help)
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BAREBOX_CMD_END
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