Is that true we can only bind mount directory to directory and file to file?
From http://man7.org/linux/man-pages/man2/mount.2.html
mount() attaches the filesystem specified by source (which is often a
pathname referring to a device, but can also be the pathname of a
directory or file, or a dummy string) to the location (a directory or
file) specified by the pathname in target.
And I test a little bit, where test.ext4 is an ext4 image file and mnt just a normal plain file.
before anything happen
xtricman@archlinux ~ ls mnt test.ext4 -ali
1093586 -rw-r--r-- 1 xtricman users 0 2月 27 10:13 mnt
1085615 -rw-r--r-- 1 xtricman users 16777216 2月 24 19:35 test.ext4
mount directory to file, failed
xtricman@archlinux ~ sudo mount --bind /var mnt
mount: /home/xtricman/mnt: mount point is not a directory.
try to let mount create a loop device and mount it to file, failed
xtricman@archlinux ~ sudo mount test.ext4 mnt
mount: /home/xtricman/mnt: mount point is not a directory.
try to mount file to directory, failed
xtricman@archlinux ~ sudo mount --bind test.ext4 /mnt
mount: /mnt: mount(2) system call failed: 不是目录.
So, is it really true that we can only bind mount directory to directory and file to file? And what does the "dummy string" mean? Wouldn't a non-exist path as source or target simply fail?
linux mount
asked 2 mins ago
炸鱼薯条德里克炸鱼薯条德里克
521215
add a comment |
From http://man7.org/linux/man-pages/man2/mount.2.html
mount() attaches the filesystem specified by source (which is often a
pathname referring to a device, but can also be the pathname of a
directory or file, or a dummy string) to the location (a directory or
file) specified by the pathname in target.
And I test a little bit, where test.ext4 is an ext4 image file and mnt just a normal plain file.
before anything happen
xtricman@archlinux ~ ls mnt test.ext4 -ali
1093586 -rw-r--r-- 1 xtricman users 0 2月 27 10:13 mnt
1085615 -rw-r--r-- 1 xtricman users 16777216 2月 24 19:35 test.ext4
mount directory to file, failed
xtricman@archlinux ~ sudo mount --bind /var mnt
mount: /home/xtricman/mnt: mount point is not a directory.
try to let mount create a loop device and mount it to file, failed
xtricman@archlinux ~ sudo mount test.ext4 mnt
mount: /home/xtricman/mnt: mount point is not a directory.
try to mount file to directory, failed
xtricman@archlinux ~ sudo mount --bind test.ext4 /mnt
mount: /mnt: mount(2) system call failed: 不是目录.
So, is it really true that we can only bind mount directory to directory and file to file? And what does the "dummy string" mean? Wouldn't a non-exist path as source or target simply fail?
linux mount
asked 2 mins ago
炸鱼薯条德里克炸鱼薯条德里克
521215
add a comment |
From http://man7.org/linux/man-pages/man2/mount.2.html
mount() attaches the filesystem specified by source (which is often a
pathname referring to a device, but can also be the pathname of a
directory or file, or a dummy string) to the location (a directory or
file) specified by the pathname in target.
And I test a little bit, where test.ext4 is an ext4 image file and mnt just a normal plain file.
before anything happen
xtricman@archlinux ~ ls mnt test.ext4 -ali
1093586 -rw-r--r-- 1 xtricman users 0 2月 27 10:13 mnt
1085615 -rw-r--r-- 1 xtricman users 16777216 2月 24 19:35 test.ext4
mount directory to file, failed
xtricman@archlinux ~ sudo mount --bind /var mnt
mount: /home/xtricman/mnt: mount point is not a directory.
try to let mount create a loop device and mount it to file, failed
xtricman@archlinux ~ sudo mount test.ext4 mnt
mount: /home/xtricman/mnt: mount point is not a directory.
try to mount file to directory, failed
xtricman@archlinux ~ sudo mount --bind test.ext4 /mnt
mount: /mnt: mount(2) system call failed: 不是目录.
So, is it really true that we can only bind mount directory to directory and file to file? And what does the "dummy string" mean? Wouldn't a non-exist path as source or target simply fail?
linux mount
asked 2 mins ago
炸鱼薯条德里克炸鱼薯条德里克
521215
From http://man7.org/linux/man-pages/man2/mount.2.html
mount() attaches the filesystem specified by source (which is often a
pathname referring to a device, but can also be the pathname of a
directory or file, or a dummy string) to the location (a directory or
file) specified by the pathname in target.
And I test a little bit, where test.ext4 is an ext4 image file and mnt just a normal plain file.
before anything happen
xtricman@archlinux ~ ls mnt test.ext4 -ali
1093586 -rw-r--r-- 1 xtricman users 0 2月 27 10:13 mnt
1085615 -rw-r--r-- 1 xtricman users 16777216 2月 24 19:35 test.ext4
mount directory to file, failed
xtricman@archlinux ~ sudo mount --bind /var mnt
mount: /home/xtricman/mnt: mount point is not a directory.
try to let mount create a loop device and mount it to file, failed
xtricman@archlinux ~ sudo mount test.ext4 mnt
mount: /home/xtricman/mnt: mount point is not a directory.
try to mount file to directory, failed
xtricman@archlinux ~ sudo mount --bind test.ext4 /mnt
mount: /mnt: mount(2) system call failed: 不是目录.
So, is it really true that we can only bind mount directory to directory and file to file? And what does the "dummy string" mean? Wouldn't a non-exist path as source or target simply fail?
linux mount
linux mount
asked 2 mins ago
炸鱼薯条德里克炸鱼薯条德里克
521215
asked 2 mins ago
炸鱼薯条德里克炸鱼薯条德里克
521215
asked 2 mins ago
炸鱼薯条德里克炸鱼薯条德里克
521215
asked 2 mins ago
炸鱼薯条德里克炸鱼薯条德里克
521215
asked 2 mins ago
炸鱼薯条德里克炸鱼薯条德里克
521215
521215
add a comment |
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