[OE-core] [PATCH 1/1] useradd_base.bbclass: fix simultaneous with flock
kai.kang at windriver.com
kai.kang at windriver.com
Tue Feb 23 02:45:57 UTC 2016
From: Kai Kang <kai.kang at windriver.com>
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 file for all the
user and group related operations.
[YOCTO #9022]
Signed-off-by: Kai Kang <kai.kang at windriver.com>
---
meta/classes/useradd.bbclass | 6 +-
meta/classes/useradd_base.bbclass | 186 ++++++++------------------------------
2 files changed, 40 insertions(+), 152 deletions(-)
diff --git a/meta/classes/useradd.bbclass b/meta/classes/useradd.bbclass
index c960656..0a6f2be 100644
--- a/meta/classes/useradd.bbclass
+++ b/meta/classes/useradd.bbclass
@@ -57,7 +57,7 @@ if test "x`echo $GROUPADD_PARAM | tr -d '[:space:]'`" != "x"; then
opts=`echo "$GROUPADD_PARAM" | cut -d ';' -f 1`
remaining=`echo "$GROUPADD_PARAM" | cut -d ';' -f 2-`
while test "x$opts" != "x"; do
- perform_groupadd "$SYSROOT" "$OPT $opts" 10
+ perform_groupadd "$SYSROOT" "$OPT $opts"
if test "x$opts" = "x$remaining"; then
break
fi
@@ -73,7 +73,7 @@ if test "x`echo $USERADD_PARAM | tr -d '[:space:]'`" != "x"; then
opts=`echo "$USERADD_PARAM" | cut -d ';' -f 1`
remaining=`echo "$USERADD_PARAM" | cut -d ';' -f 2-`
while test "x$opts" != "x"; do
- perform_useradd "$SYSROOT" "$OPT $opts" 10
+ perform_useradd "$SYSROOT" "$OPT $opts"
if test "x$opts" = "x$remaining"; then
break
fi
@@ -89,7 +89,7 @@ if test "x`echo $GROUPMEMS_PARAM | tr -d '[:space:]'`" != "x"; then
opts=`echo "$GROUPMEMS_PARAM" | cut -d ';' -f 1`
remaining=`echo "$GROUPMEMS_PARAM" | cut -d ';' -f 2-`
while test "x$opts" != "x"; do
- perform_groupmems "$SYSROOT" "$OPT $opts" 10
+ perform_groupmems "$SYSROOT" "$OPT $opts"
if test "x$opts" = "x$remaining"; then
break
fi
diff --git a/meta/classes/useradd_base.bbclass b/meta/classes/useradd_base.bbclass
index ab3cd35..7c1cc13 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
@@ -12,65 +12,32 @@
perform_groupadd () {
local rootdir="$1"
- local opts="$2"
- local retries="$3"
- bbnote "${PN}: Performing groupadd with [$opts] and $retries times of retry"
+ local opts=`echo $2 | sed s/\'/\"/g`
+ bbnote "${PN}: Performing groupadd with [$opts]"
+ eval flock -x -w 100 $rootdir${sysconfdir} -c \'$PSEUDO groupadd $opts\' || true
local groupname=`echo "$opts" | awk '{ print $NF }'`
- local group_exists="`grep "^$groupname:" $rootdir/etc/group || true`"
+ local group_exists=`grep "^$groupname:" $rootdir/etc/group`
if test "x$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 $count
- done
- else
- bbnote "${PN}: group $groupname already exists, not re-creating it"
+ bbfatal "${PN}: groupadd command did not succeed."
fi
}
perform_useradd () {
local rootdir="$1"
- local opts="$2"
- local retries="$3"
- bbnote "${PN}: Performing useradd with [$opts] and $retries times of retry"
+ local opts=`echo $2 | sed s/\'/\"/g`
+ bbnote "${PN}: Performing useradd with [$opts]"
+ eval flock -x -w 100 $rootdir${sysconfdir} -c \'$PSEUDO useradd $opts\' || true
local username=`echo "$opts" | awk '{ print $NF }'`
- local user_exists="`grep "^$username:" $rootdir/etc/passwd || true`"
+ local user_exists=`grep "^$username:" $rootdir/etc/passwd`
if test "x$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 $count
- done
- else
- bbnote "${PN}: user $username already exists, not re-creating it"
+ bbfatal "${PN}: useradd command did not succeed."
fi
}
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"
@@ -82,30 +49,13 @@ perform_groupmems () {
gshadow="no"
touch $rootdir${sysconfdir}/gshadow
fi
- local mem_exists="`grep "^$groupname:[^:]*:[^:]*:\([^,]*,\)*$username\(,[^,]*\)*" $rootdir/etc/group || true`"
+
+ eval flock -x -w 100 $rootdir${sysconfdir} -c \'$PSEUDO groupmems $opts\' || true
+ local mem_exists=`grep "^$groupname:[^:]*:[^:]*:\([^,]*,\)*$username\(,[^,]*\)*" $rootdir/etc/group`
if test "x$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 $count
- done
- else
- bbnote "${PN}: group $groupname already contains $username, not re-adding it"
+ bbfatal "${PN}: groupmems command did not succeed."
fi
+
if test "x$gshadow" = "xno"; then
rm -f $rootdir${sysconfdir}/gshadow
rm -f $rootdir${sysconfdir}/gshadow-
@@ -115,56 +65,24 @@ 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]"
+ eval flock -x -w 100 $rootdir${sysconfdir} -c \'$PSEUDO groupdel $opts\' || true
local groupname=`echo "$opts" | awk '{ print $NF }'`
- local group_exists="`grep "^$groupname:" $rootdir/etc/group || true`"
+ local group_exists=`grep "^$groupname:" $rootdir/etc/group`
if test "x$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 $count
- done
- else
- bbnote "${PN}: group $groupname doesn't exist, not removing it"
+ bbfatal "${PN}: groupdel command did not succeed."
fi
}
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]"
+ eval flock -x -w 100 $rootdir${sysconfdir} -c \'$PSEUDO userdel $opts\' || true
local username=`echo "$opts" | awk '{ print $NF }'`
- local user_exists="`grep "^$username:" $rootdir/etc/passwd || true`"
+ local user_exists=`grep "^$username:" $rootdir/etc/passwd`
if test "x$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 $count
- done
- else
- bbnote "${PN}: user $username doesn't exist, not removing it"
+ bbfatal "${PN}: userdel command did not succeed."
fi
}
@@ -172,59 +90,29 @@ perform_groupmod () {
# Other than the return value of groupmod, there's no simple way to judge whether the command
# succeeds, so we disable -e option temporarily
set +e
+
local rootdir="$1"
local opts="$2"
- local retries="$3"
- bbnote "${PN}: Performing groupmod with [$opts] and $retries times of retry"
- local groupname=`echo "$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 $count
- done
- else
- bbwarn "${PN}: group $groupname doesn't exist, unable to modify it"
+ bbnote "${PN}: Performing groupmod with [$opts]"
+ eval flock -x -w 100 $rootdir${sysconfdir} -c \'$PSEUDO groupmod $opts\'
+ if test $? != 0; then
+ bbwarn "${PN}: groupmod command did not succeed."
fi
+
set -e
}
perform_usermod () {
# Same reason with groupmod, temporarily disable -e option
set +e
+
local rootdir="$1"
local opts="$2"
- local retries="$3"
- bbnote "${PN}: Performing usermod with [$opts] and $retries times of retry"
- local username=`echo "$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 $count
- done
- else
- bbwarn "${PN}: user $username doesn't exist, unable to modify it"
+ bbnote "${PN}: Performing usermod with [$opts]"
+ eval flock -x -w 100 $rootdir${sysconfdir} -c \'$PSEUDO usermod $opts\'
+ if test $? != 0; then
+ bbfatal "${PN}: usermod command did not succeed."
fi
+
set -e
}
--
2.6.1
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