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https://github.com/RGBCube/serenity
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0739b5df11
Check if the source fd is not a block device file using the fstat syscall and if that's the case, try to mount the file using a temporary loop device.
55 lines
1.7 KiB
Markdown
55 lines
1.7 KiB
Markdown
## Name
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mount - mount a filesystem
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## Synopsis
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```**sh
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$ mount
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# mount -a
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# mount <source> <target> [-t fstype] [-o options]
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```
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## Description
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If invoked without any arguments, `mount` prints a list of all currently mounted
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filesystems.
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If invoked as `mount -a`, `mount` mounts all the filesystems configured in
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`/etc/fstab` and `/etc/fstab.d/*`. This is normally done on system startup by
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[`SystemServer`(7)](help://man/7/SystemServer).
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Otherwise, `mount` performs a single filesystem mount. Source should be a path
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to a file containing the filesystem image. Target and fstype have the same
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meaning as in the [`mount`(2)](help://man/2/mount) syscall (if not specified,
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fstype defaults to `ext2`).
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A special source value "none" is recognized, in which case
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[`mount`(8)](help://man/8/mount) will not attempt to open the source as a file, and will
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pass an invalid file descriptor to [`mount`(2)](help://man/2/mount). This is
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useful for mounting pseudo filesystems.
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Options correspond to the mount flags, and should be specified as a
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comma-separated list of flag names (lowercase and without the `MS_` prefix).
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Additionally, the name `defaults` is accepted and ignored.
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## Files
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* `/etc/fstab` - read by `mount -a` on startup to find out which filesystems to mount.
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* `/etc/fstab.d` - directory with drop-in additions to the normal `fstab` file, also read by `mount -a`.
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* `/sys/kernel/df` - read by `mount` to get information about mounted filesystems.
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## Examples
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```sh
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# mount devpts /dev/pts -t devpts -o noexec,nosuid
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# mount /home/anon/myfile.txt /tmp/foo -o bind
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# mount a regular file using a temporary loop device
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$ mount /home/anon/myfilesystem.bin /mnt
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```
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## See also
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* [`mount`(2)](help://man/2/mount)
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* [`umount`(8)](help://man/8/umount)
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