Is it possible to remount a filesystem read-only, if it has open fifos?
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If a file is still open for writing on the root file system, for example, the filesystem cannot be remounted read-only for a clean shutdown.
At least this is true for regular files. But what about named pipes, aka fifos?
linux mount fifo
asked Jul 12 at 21:32
sourcejedi
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up vote
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down vote
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If a file is still open for writing on the root file system, for example, the filesystem cannot be remounted read-only for a clean shutdown.
At least this is true for regular files. But what about named pipes, aka fifos?
linux mount fifo
asked Jul 12 at 21:32
sourcejedi
18k22375
add a comment |Â
up vote
0
down vote
favorite
up vote
0
down vote
favorite
If a file is still open for writing on the root file system, for example, the filesystem cannot be remounted read-only for a clean shutdown.
At least this is true for regular files. But what about named pipes, aka fifos?
linux mount fifo
asked Jul 12 at 21:32
sourcejedi
18k22375
If a file is still open for writing on the root file system, for example, the filesystem cannot be remounted read-only for a clean shutdown.
At least this is true for regular files. But what about named pipes, aka fifos?
linux mount fifo
asked Jul 12 at 21:32
sourcejedi
18k22375
asked Jul 12 at 21:32
sourcejedi
18k22375
asked Jul 12 at 21:32
sourcejedi
18k22375
asked Jul 12 at 21:32
sourcejedi
18k22375
18k22375
add a comment |Â
add a comment |Â
1 Answer
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Yes. Opening a fifo special file for writing, does not prevent the filesystem from being remounted read-only.
# unshare -rm
# mount -ttmpfs tmp /mnt
# mknod /mnt/fifo p
# exec 3<>/mnt/fifo
# mount /mnt -oremount,ro
# exit
answered Jul 12 at 21:32
sourcejedi
18k22375
add a comment |Â
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
0
down vote
accepted
Yes. Opening a fifo special file for writing, does not prevent the filesystem from being remounted read-only.
# unshare -rm
# mount -ttmpfs tmp /mnt
# mknod /mnt/fifo p
# exec 3<>/mnt/fifo
# mount /mnt -oremount,ro
# exit
answered Jul 12 at 21:32
sourcejedi
18k22375
add a comment |Â
up vote
0
down vote
accepted
Yes. Opening a fifo special file for writing, does not prevent the filesystem from being remounted read-only.
# unshare -rm
# mount -ttmpfs tmp /mnt
# mknod /mnt/fifo p
# exec 3<>/mnt/fifo
# mount /mnt -oremount,ro
# exit
answered Jul 12 at 21:32
sourcejedi
18k22375
add a comment |Â
up vote
0
down vote
accepted
up vote
0
down vote
accepted
Yes. Opening a fifo special file for writing, does not prevent the filesystem from being remounted read-only.
# unshare -rm
# mount -ttmpfs tmp /mnt
# mknod /mnt/fifo p
# exec 3<>/mnt/fifo
# mount /mnt -oremount,ro
# exit
answered Jul 12 at 21:32
sourcejedi
18k22375
Yes. Opening a fifo special file for writing, does not prevent the filesystem from being remounted read-only.
# unshare -rm
# mount -ttmpfs tmp /mnt
# mknod /mnt/fifo p
# exec 3<>/mnt/fifo
# mount /mnt -oremount,ro
# exit
answered Jul 12 at 21:32
sourcejedi
18k22375
answered Jul 12 at 21:32
sourcejedi
18k22375
answered Jul 12 at 21:32
sourcejedi
18k22375
answered Jul 12 at 21:32
sourcejedi
18k22375
18k22375
add a comment |Â
add a comment |Â
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