__umount_*loop from FC.

svn-id: @11929

diff --git a/rc.d/init.d/functions b/rc.d/init.d/functions
index 47de4a3a9cd89cb2395dd6fa5c24e5f78e14462a..a6c8b9d77abd53c02d91a948f610f095ebf25c3a 100644 (file)
--- a/rc.d/init.d/functions
+++ b/rc.d/init.d/functions
@@ -1037,6 +1037,66 @@ is_fsmounted() {
        fi
 }
 
+# __umount_loop awk_program fstab_file first_msg retry_msg umount_args
+# awk_program should process fstab_file and return a list of fstab-encoded
+# paths; it doesn't have to handle comments in fstab_file.
+__umount_loop() {
+       local remaining sig=
+       local retry=3 count
+
+       remaining=$(LC_ALL=C awk "/^#/ {next} $1" "$2" | sort -r)
+       while [ -n "$remaining" -a "$retry" -gt 0 ]; do
+               if [ "$retry" -eq 3 ]; then
+                       run_cmd "$3" fstab-decode umount $5 $remaining
+               else
+                       run_cmd "$4" fstab-decode umount $5 $remaining
+               fi
+               count=4
+               remaining=$(LC_ALL=C awk "/^#/ {next} $1" "$2" | sort -r)
+               while [ "$count" -gt 0 ]; do
+                       [ -z "$remaining" ] && break
+                       count=$(($count-1))
+                       usleep 500000
+                       remaining=$(LC_ALL=C awk "/^#/ {next} $1" "$2" | sort -r)
+               done
+               [ -z "$remaining" ] && break
+               fstab-decode /sbin/fuser -k -m $sig $remaining >/dev/null
+               sleep 3
+               retry=$(($retry -1))
+               sig=-9
+       done
+}
+
+# Similar to __umount loop above, specialized for loopback devices
+__umount_loopback_loop() {
+       local remaining devremaining sig=
+       local retry=3
+
+       remaining=$(awk '$1 ~ /^\/dev\/loop/ && $2 != "/" {print $2}' /proc/mounts)
+       devremaining=$(awk '$1 ~ /^\/dev\/loop/ && $2 != "/" {print $1}' /proc/mounts)
+       while [ -n "$remaining" -a "$retry" -gt 0 ]; do
+               if [ "$retry" -eq 3 ]; then
+                       run_cmd "Unmounting loopback filesystems: " \
+                               fstab-decode umount $remaining
+               else
+                       run_cmd "Unmounting loopback filesystems (retry):" \
+                               fstab-decode umount $remaining
+               fi
+               for dev in $devremaining ; do
+                       losetup $dev > /dev/null 2>&1 && \
+                               run_cmd "Detaching loopback device $dev: " \
+                               losetup -d $dev
+               done
+               remaining=$(awk '$1 ~ /^\/dev\/loop/ && $2 != "/" {print $2}' /proc/mounts)
+               devremaining=$(awk '$1 ~ /^\/dev\/loop/ && $2 != "/" {print $1}' /proc/mounts)
+               [ -z "$remaining" ] && break
+               fstab-decode /sbin/fuser -k -m $sig $remaining >/dev/null
+               sleep 3
+               retry=$(($retry -1))
+               sig=-9
+       done
+}
+
 rc_cache_init() {
        # If we have cachefile, use it.
        # If we don't, create memory variables and try to save silently,