Rc.shutdown doesn't seem to umount the filesystems correctly

Question

The problem is that each time I shutdown/reboot, there's a message saying "Unmounting Non-API Filesystems" failed, and the next time system boots, fsck will recover journal. I looked into etc/rc.shutdown, found that it calls umount_all in etc/rc.d/functions. I made the following changes to umount_all (just add some echo to record infomation in /tmp/permanent/umount_all_log):
umount_all() {
# $1: restrict to fstype
local mounts
while read -r target fstype options; do
echo "got: $taret $fstype $options"
# match only targetted fstypes
if [[ $1 && $1 != "$fstype" ]]; then
echo "fstype=$1, ignore"
continue
fi
# don't unmount API filesystems
if [[ $target = /@(proc|sys|run|dev|dev/pts) ]]; then
echo "API fs, ignore"
continue
fi
# avoid networked devices
IFS=, read -ra opts <<< "$options"
if in_array _netdev "${opts[@]}"; then
echo "_netdev in ${opts[@]}, ignore"
continue
fi
echo "recorded: $taret $fstype $options"
mounts+=("$target")
done < <(findmnt -mrunRo TARGET,FSTYPE,OPTIONS / | tac)
echo "env:"
env
echo -n "which tac: "
which tac
echo "test tac: expected b\na"
echo -e "a\nb" | tac
echo "test done"
echo "cmd: umount -r" "${mounts[@]}"
echo "findmnt -mrunRo TARGET,FSTYPE,OPTIONS /:"
findmnt -mrunRo TARGET,FSTYPE,OPTIONS /
echo "findmnt -mrunRo TARGET,FSTYPE,OPTIONS / | tac:"
findmnt -mrunRo TARGET,FSTYPE,OPTIONS / | tac
echo "findmnt: "
findmnt
echo "mount:"
mount
umount -r "${mounts[@]}"
) 2>&1 > /tmp/permanent/umount_all_log
and after rebooting, the contents of /tmp/permanent/umount_all_log are:
env:
CONSOLE=/dev/console
SHELL=/bin/sh
TERM=linux
INIT_VERSION=sysvinit-2.88
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
RUNLEVEL=0
PWD=/
LANG=C
PREVLEVEL=3
SHLVL=1
HOME=/
BOOT_IMAGE=/linux-3.1.6
_=/usr/bin/env
which tac: /usr/bin/tac
test tac: expected b\na
test done
cmd: umount -r
findmnt -mrunRo TARGET,FSTYPE,OPTIONS /:
/ ext4 rw,relatime,user_xattr,barrier=1,data=ordered
/proc proc rw,nosuid,nodev,noexec,relatime
/sys sysfs rw,nosuid,nodev,noexec,relatime
/run tmpfs rw,nosuid,nodev,relatime,mode=755
/dev devtmpfs rw,nosuid,relatime,size=1035396k,nr_inodes=221041,mode=755
/dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620
/tmp tmpfs ro,relatime,size=517804k
/tmp/permanent ext2 rw,relatime,errors=continue
/home ext3 rw,relatime,errors=continue,barrier=1,data=writeback
findmnt -mrunRo TARGET,FSTYPE,OPTIONS / | tac:
findmnt:
TARGET SOURCE FSTYPE OPTIONS
/ /dev/root ext4 rw,relatime,user_xattr,barrier=1,data=ordered
|-/proc proc proc rw,nosuid,nodev,noexec,relatime
|-/sys /sys sysfs rw,nosuid,nodev,noexec,relatime
|-/run /run tmpfs rw,nosuid,nodev,relatime,mode=755
|-/dev udev devtmpfs rw,nosuid,relatime,size=1035396k,nr_inodes=221041,mode=755
| `-/dev/pts devpts devpts rw,nosuid,noexec,relatime,gid=5,mode=620
|-/tmp tmpfs tmpfs ro,relatime,size=517804k
| `-/tmp/permanent /dev/sda7 ext2 rw,relatime,errors=continue
`-/home /dev/sda9 ext3 rw,relatime,errors=continue,barrier=1,data=writeback
mount:
/dev/root on / type ext4 (rw,relatime,user_xattr,barrier=1,data=ordered)
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
/sys on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
/run on /run type tmpfs (rw,nosuid,nodev,relatime,mode=755)
udev on /dev type devtmpfs (rw,nosuid,relatime,size=1035396k,nr_inodes=221041,mode=755)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620)
tmpfs on /tmp type tmpfs (ro,relatime,size=517804k)
/dev/sda9 on /home type ext3 (rw,relatime,errors=continue,barrier=1,data=writeback)
/dev/sda7 on /tmp/permanent type ext2 (rw,relatime,errors=continue)
it seems that tac does not work when shutting down...
have anyone of you ever experienced such problem? and do you know what's the reason?
Last edited by jiakai (2012-01-01 09:03:24)

Answer 1

karol wrote:
Something's wrong with your tac
[karol@black ~]$ which tac
/usr/bin/tac
[karol@black ~]$ file /usr/bin/tac
/usr/bin/tac: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.27, BuildID[sha1]=0x5390b705e6c9a431be9dd66e418cd52508e6f5a5, stripped
[karol@black ~]$ pacman -Qo tac
/usr/bin/tac is owned by coreutils 8.14-1
Maybe you've created some script named 'tac' and placed it higher up in $PATH:
[karol@black ~]$ cat tac
#!/bin/bash
[karol@black ~]$ sudo mv tac /usr/local/bin/
[karol@black ~]$ which tac
/usr/local/bin/tac
[karol@black ~]$ cat tac_test
#!/bin/bash
echo "test tac: expected b\na"
echo -e "a\nb" | tac
echo "test done"
[karol@black ~]$ ./tac_test
test tac: expected b\na
test done
[karol@black ~]$ sudo rm -f /usr/local/bin/tac
[karol@black ~]$ ./tac_test
test tac: expected b\na
b
a
test done
thx for your reply!
but i also have the following lines in the script:
echo -n "which tac: "
which tac
and the output is:
which tac: /usr/bin/tac
and when i do not actually shutdown/reboot, the output is right.
if i run the following script without root privilege, i got the expected output
$ cat test.sh
#!/bin/bash
. ./functions
umount_all
Last edited by jiakai (2012-01-02 03:15:40)