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Replace mount with findmnt

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this fixes a mount-related functionality (finding the volume label) in new
versions of util-linux, that since v2.30 does not list anymore volume labels
with its mount -l command. Since findmnt needs sudo to list labels, this also
introduces the need for sudo in more commands: is_valid_tomb(), list, index and
search. The issue was examined in PR #283 and this is a rebase of it.
This commit is contained in:
Victor Calvert 2017-08-16 16:54:08 -04:00 committed by Jaromil
parent e083ce7a23
commit 09ff889c1d
1 changed files with 28 additions and 44 deletions
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tomb
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@ -549,9 +549,9 @@ is_valid_tomb() {
_plot $1 # Set TOMB{PATH,DIR,FILE,NAME}
# Tomb already mounted (or we cannot alter it)
[[ "`mount -l |
[[ "`_sudo findmnt -lrvo SOURCE,TARGET,FSTYPE,OPTIONS,LABEL |
awk -vtomb="[$TOMBNAME]" '
/^\/dev\/mapper\/tomb/ { if($7==tomb) print $1 }'`" = "" ]] || {
/^\/dev\/mapper\/tomb/ { if($5==tomb) print $1 }'`" = "" ]] || {
_failure "Tomb is currently in use: ::1 tomb name::" $TOMBNAME
}
_verbose "tomb file is not currently in use"
@ -2264,27 +2264,24 @@ awk "/mapper/"' { print $2 ";" $3 ";" $4 ";" $5 }'`
list_tomb_mounts() {
[[ -z "$1" ]] && {
# list all open tombs
mount -l \
_sudo findmnt -lrvo SOURCE,TARGET,FSTYPE,OPTIONS,LABEL \
| awk '
BEGIN { main="" }
/^\/dev\/mapper\/tomb/ {
if(main==$1) next;
print $1 ";" $3 ";" $5 ";" $6 ";" $7
print $1 ";" $2 ";" $3 ";(" $4 ");[" $5 "]"
main=$1
}
'
} || { # list a specific tomb
# add square parens if not present
local tname
if [[ "${1[1]}" = "[" ]]; then tname=$1
else tname="[$1]"; fi
mount -l \
| awk -vtomb="$tname" '
} || {
# list a specific tomb
_sudo findmnt -lrvo SOURCE,TARGET,FSTYPE,OPTIONS,LABEL \
| awk -vtomb="[$1]" '
BEGIN { main="" }
/^\/dev\/mapper\/tomb/ {
if($7!=tomb) next;
if("["$5"]"!=tomb) next;
if(main==$1) next;
print $1 ";" $3 ";" $5 ";" $6 ";" $7
print $1 ";" $2 ";" $3 ";(" $4 ");[" $5 "]"
main=$1
}
'
@ -2300,37 +2297,23 @@ list_tomb_binds() {
[[ -z "$2" ]] && {
_failure "Internal error: list_tomb_binds called without argument." }
# OK well, prepare for some insanity: parsing the mount table on GNU/Linux
# is like combing a Wookie while he is riding a speedbike down a valley.
# much simpler than the crazy from before
# in fact, the second parameter is now redundant
# as we only need the tomb name
typeset -A tombs
typeset -a binds
for t in "${(f)$(mount -l | grep '/dev/mapper/tomb.*]$')}"; do
len="${(w)#t}"
[[ "${t[(w)$len]}" = "$1" ]] || continue
tombs+=( ${t[(w)1]} ${t[(w)$len]} )
# note that this code assumes that the tomb name is provided in square brackets
done
for m in ${(k)tombs}; do
for p in "${(f)$(cat /proc/mounts):s/\\040(deleted)/}"; do
# Debian's kernel appends a '\040(deleted)' to the mountpoint in /proc/mounts
# so if we parse the string as-is then this will break the parsing. How nice of them!
# Some bugs related to this are more than 10yrs old. Such Debian! Much stable! Very parsing!
# Bug #711183 umount parser for /proc/mounts broken on stale nfs mount (gets renamed to "/mnt/point (deleted)")
# Bug #711184 mount should not stat mountpoints on mount
# Bug #711187 linux-image-3.2.0-4-amd64: kernel should not rename mountpoint if nfs server is dead/unreachable
[[ "${p[(w)1]}" = "$m" ]] && {
[[ "${(q)p[(w)2]}" != "${(q)2}" ]] && {
# Our output format:
# mapper;mountpoint;fs;flags;name
binds+=("$m;${(q)p[(w)2]};${p[(w)3]};${p[(w)4]};${tombs[$m]}") }
}
done
done
# print the results out line by line
for b in $binds; do print - "$b"; done
_sudo findmnt -lro SOURCE,TARGET,FSTYPE,OPTIONS,LABEL \
| grep -F "/dev/mapper/tomb" \
| awk -vpattern="$1" '
BEGIN { }
{
if("["$5"]"!=pattern) next;
if(index($1,"[")==0) next;
gsub("[[][^]]*[]]","",$1);
print $1 ";" $2 ";" $3 ";(" $4 ");[" $5 "]"
}
'
}
# }}} - Tomb list
@ -2519,8 +2502,8 @@ resize_tomb() {
_load_key # Try loading new key from option -k and set TOMBKEYFILE
local oldtombsize=$(( `stat -c %s "$TOMBPATH" 2>/dev/null` / 1048576 ))
local mounted_tomb=`mount -l |
awk -vtomb="[$TOMBNAME]" '/^\/dev\/mapper\/tomb/ { if($7==tomb) print $1 }'`
local mounted_tomb=`_sudo findmnt -lrvo SOURCE,TARGET,FSTYPE,OPTIONS,LABEL |
awk -vtomb="[$TOMBNAME]" '/^\/dev\/mapper\/tomb/ { if($5==tomb) print $1 }'`
# Tomb must not be open
[[ -z "$mounted_tomb" ]] || {
@ -2613,6 +2596,7 @@ umount_tomb() {
for t in ${mounted_tombs}; do
mapper=`basename ${t[(ws:;:)1]}`
# strip square parens from tombname
tombname=${t[(ws:;:)5]}
tombmount=${t[(ws:;:)2]}
tombfs=${t[(ws:;:)3]}