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authorKai Kang <kai.kang@windriver.com>2016-02-29 17:19:32 +0800
committerRichard Purdie <richard.purdie@linuxfoundation.org>2016-03-20 22:57:55 +0000
commit2ebf697b46c42cee8bfa6d2e6087397f8cce385c (patch)
tree07f7b4ba69ae1e948a23eb36dae9c77bbd92ca2b /meta/classes/useradd_base.bbclass
parent66b461ce9df7ed06d7651b9b54a49a950b97a1d4 (diff)
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useradd_base.bbclass: replace retry logic with flock
When perform useradd during populate sysroot, it locks files passwd.lock and group.lock at same time. And then it meets a dead lock issue randomly. Use flock to reslove it by using an universal lock directory for all the user and group related operations. [YOCTO #9022] Signed-off-by: Kai Kang <kai.kang@windriver.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
Diffstat (limited to 'meta/classes/useradd_base.bbclass')
-rw-r--r--meta/classes/useradd_base.bbclass165
1 files changed, 43 insertions, 122 deletions
diff --git a/meta/classes/useradd_base.bbclass b/meta/classes/useradd_base.bbclass
index ab3cd353f0..9b8f5c2207 100644
--- a/meta/classes/useradd_base.bbclass
+++ b/meta/classes/useradd_base.bbclass
@@ -4,7 +4,7 @@
# The following functions basically have similar logic.
# *) Perform necessary checks before invoking the actual command
-# *) Invoke the actual command, make retries if necessary
+# *) Invoke the actual command with flock
# *) Error out if an error occurs.
# Note that before invoking these functions, make sure the global variable
@@ -13,26 +13,16 @@
perform_groupadd () {
local rootdir="$1"
local opts="$2"
- local retries="$3"
- bbnote "${PN}: Performing groupadd with [$opts] and $retries times of retry"
+ bbnote "${PN}: Performing groupadd with [$opts]"
local groupname=`echo "$opts" | awk '{ print $NF }'`
local group_exists="`grep "^$groupname:" $rootdir/etc/group || true`"
if test "x$group_exists" = "x"; then
- local count=0
- while true; do
- eval $PSEUDO groupadd $opts || true
- group_exists="`grep "^$groupname:" $rootdir/etc/group || true`"
- if test "x$group_exists" = "x"; then
- bbwarn "${PN}: groupadd command did not succeed. Retrying..."
- else
- break
- fi
- count=`expr $count + 1`
- if test $count = $retries; then
- bbfatal "${PN}: Tried running groupadd command $retries times without success, giving up"
- fi
- sleep $count
- done
+ opts=`echo $opts | sed s/\'/\"/g`
+ eval flock -x -w 100 $rootdir${sysconfdir} -c \'$PSEUDO groupadd $opts\' || true
+ group_exists="`grep "^$groupname:" $rootdir/etc/group || true`"
+ if test "x$group_exists" = "x"; then
+ bbfatal "${PN}: groupadd command did not succeed."
+ fi
else
bbnote "${PN}: group $groupname already exists, not re-creating it"
fi
@@ -41,26 +31,16 @@ perform_groupadd () {
perform_useradd () {
local rootdir="$1"
local opts="$2"
- local retries="$3"
- bbnote "${PN}: Performing useradd with [$opts] and $retries times of retry"
+ bbnote "${PN}: Performing useradd with [$opts]"
local username=`echo "$opts" | awk '{ print $NF }'`
local user_exists="`grep "^$username:" $rootdir/etc/passwd || true`"
if test "x$user_exists" = "x"; then
- local count=0
- while true; do
- eval $PSEUDO useradd $opts || true
- user_exists="`grep "^$username:" $rootdir/etc/passwd || true`"
- if test "x$user_exists" = "x"; then
- bbwarn "${PN}: useradd command did not succeed. Retrying..."
- else
- break
- fi
- count=`expr $count + 1`
- if test $count = $retries; then
- bbfatal "${PN}: Tried running useradd command $retries times without success, giving up"
- fi
- sleep $count
- done
+ opts=`echo $opts | sed s/\'/\"/g`
+ eval flock -x -w 100 $rootdir${sysconfdir} -c \'$PSEUDO useradd $opts\' || true
+ user_exists="`grep "^$username:" $rootdir/etc/passwd || true`"
+ if test "x$user_exists" = "x"; then
+ bbfatal "${PN}: useradd command did not succeed."
+ fi
else
bbnote "${PN}: user $username already exists, not re-creating it"
fi
@@ -69,8 +49,7 @@ perform_useradd () {
perform_groupmems () {
local rootdir="$1"
local opts="$2"
- local retries="$3"
- bbnote "${PN}: Performing groupmems with [$opts] and $retries times of retry"
+ bbnote "${PN}: Performing groupmems with [$opts]"
local groupname=`echo "$opts" | awk '{ for (i = 1; i < NF; i++) if ($i == "-g" || $i == "--group") print $(i+1) }'`
local username=`echo "$opts" | awk '{ for (i = 1; i < NF; i++) if ($i == "-a" || $i == "--add") print $(i+1) }'`
bbnote "${PN}: Running groupmems command with group $groupname and user $username"
@@ -84,25 +63,11 @@ perform_groupmems () {
fi
local mem_exists="`grep "^$groupname:[^:]*:[^:]*:\([^,]*,\)*$username\(,[^,]*\)*" $rootdir/etc/group || true`"
if test "x$mem_exists" = "x"; then
- local count=0
- while true; do
- eval $PSEUDO groupmems $opts || true
- mem_exists="`grep "^$groupname:[^:]*:[^:]*:\([^,]*,\)*$username\(,[^,]*\)*" $rootdir/etc/group || true`"
- if test "x$mem_exists" = "x"; then
- bbwarn "${PN}: groupmems command did not succeed. Retrying..."
- else
- break
- fi
- count=`expr $count + 1`
- if test $count = $retries; then
- if test "x$gshadow" = "xno"; then
- rm -f $rootdir${sysconfdir}/gshadow
- rm -f $rootdir${sysconfdir}/gshadow-
- fi
- bbfatal "${PN}: Tried running groupmems command $retries times without success, giving up"
- fi
- sleep $count
- done
+ eval flock -x -w 100 $rootdir${sysconfdir} -c \'$PSEUDO groupmems $opts\' || true
+ mem_exists="`grep "^$groupname:[^:]*:[^:]*:\([^,]*,\)*$username\(,[^,]*\)*" $rootdir/etc/group || true`"
+ if test "x$mem_exists" = "x"; then
+ bbfatal "${PN}: groupmems command did not succeed."
+ fi
else
bbnote "${PN}: group $groupname already contains $username, not re-adding it"
fi
@@ -115,26 +80,15 @@ perform_groupmems () {
perform_groupdel () {
local rootdir="$1"
local opts="$2"
- local retries="$3"
- bbnote "${PN}: Performing groupdel with [$opts] and $retries times of retry"
+ bbnote "${PN}: Performing groupdel with [$opts]"
local groupname=`echo "$opts" | awk '{ print $NF }'`
local group_exists="`grep "^$groupname:" $rootdir/etc/group || true`"
if test "x$group_exists" != "x"; then
- local count=0
- while true; do
- eval $PSEUDO groupdel $opts || true
- group_exists="`grep "^$groupname:" $rootdir/etc/group || true`"
- if test "x$group_exists" != "x"; then
- bbwarn "${PN}: groupdel command did not succeed. Retrying..."
- else
- break
- fi
- count=`expr $count + 1`
- if test $count = $retries; then
- bbfatal "${PN}: Tried running groupdel command $retries times without success, giving up"
- fi
- sleep $count
- done
+ eval flock -x -w 100 $rootdir${sysconfdir} -c \'$PSEUDO groupdel $opts\' || true
+ group_exists="`grep "^$groupname:" $rootdir/etc/group || true`"
+ if test "x$group_exists" != "x"; then
+ bbfatal "${PN}: groupdel command did not succeed."
+ fi
else
bbnote "${PN}: group $groupname doesn't exist, not removing it"
fi
@@ -143,26 +97,15 @@ perform_groupdel () {
perform_userdel () {
local rootdir="$1"
local opts="$2"
- local retries="$3"
- bbnote "${PN}: Performing userdel with [$opts] and $retries times of retry"
+ bbnote "${PN}: Performing userdel with [$opts]"
local username=`echo "$opts" | awk '{ print $NF }'`
local user_exists="`grep "^$username:" $rootdir/etc/passwd || true`"
if test "x$user_exists" != "x"; then
- local count=0
- while true; do
- eval $PSEUDO userdel $opts || true
- user_exists="`grep "^$username:" $rootdir/etc/passwd || true`"
- if test "x$user_exists" != "x"; then
- bbwarn "${PN}: userdel command did not succeed. Retrying..."
- else
- break
- fi
- count=`expr $count + 1`
- if test $count = $retries; then
- bbfatal "${PN}: Tried running userdel command $retries times without success, giving up"
- fi
- sleep $count
- done
+ eval flock -x -w 100 $rootdir${sysconfdir} -c \'$PSEUDO userdel $opts\' || true
+ user_exists="`grep "^$username:" $rootdir/etc/passwd || true`"
+ if test "x$user_exists" != "x"; then
+ bbfatal "${PN}: userdel command did not succeed."
+ fi
else
bbnote "${PN}: user $username doesn't exist, not removing it"
fi
@@ -174,25 +117,14 @@ perform_groupmod () {
set +e
local rootdir="$1"
local opts="$2"
- local retries="$3"
- bbnote "${PN}: Performing groupmod with [$opts] and $retries times of retry"
+ bbnote "${PN}: Performing groupmod with [$opts]"
local groupname=`echo "$opts" | awk '{ print $NF }'`
local group_exists="`grep "^$groupname:" $rootdir/etc/group || true`"
if test "x$group_exists" != "x"; then
- local count=0
- while true; do
- eval $PSEUDO groupmod $opts
- if test $? != 0; then
- bbwarn "${PN}: groupmod command did not succeed. Retrying..."
- else
- break
- fi
- count=`expr $count + 1`
- if test $count = $retries; then
- bbfatal "${PN}: Tried running groupmod command $retries times without success, giving up"
- fi
- sleep $count
- done
+ eval flock -x -w 100 $rootdir${sysconfdir} -c \'$PSEUDO groupmod $opts\'
+ if test $? != 0; then
+ bbwarn "${PN}: groupmod command did not succeed."
+ fi
else
bbwarn "${PN}: group $groupname doesn't exist, unable to modify it"
fi
@@ -204,25 +136,14 @@ perform_usermod () {
set +e
local rootdir="$1"
local opts="$2"
- local retries="$3"
- bbnote "${PN}: Performing usermod with [$opts] and $retries times of retry"
+ bbnote "${PN}: Performing usermod with [$opts]"
local username=`echo "$opts" | awk '{ print $NF }'`
local user_exists="`grep "^$username:" $rootdir/etc/passwd || true`"
if test "x$user_exists" != "x"; then
- local count=0
- while true; do
- eval $PSEUDO usermod $opts
- if test $? != 0; then
- bbwarn "${PN}: usermod command did not succeed. Retrying..."
- else
- break
- fi
- count=`expr $count + 1`
- if test $count = $retries; then
- bbfatal "${PN}: Tried running usermod command $retries times without success, giving up"
- fi
- sleep $count
- done
+ eval flock -x -w 100 $rootdir${sysconfdir} -c \'$PSEUDO usermod $opts\'
+ if test $? != 0; then
+ bbfatal "${PN}: usermod command did not succeed."
+ fi
else
bbwarn "${PN}: user $username doesn't exist, unable to modify it"
fi