[oe-commits] Scott Garman : useradd.bbclass: retry useradd/ groupadd commands to avoid lock race issues
git at git.openembedded.org
git at git.openembedded.org
Fri Mar 23 12:16:59 UTC 2012
Module: openembedded-core.git
Branch: master
Commit: 68c589f1b5ee36f0aff151b728447ffdae14622c
URL: http://git.openembedded.org/?p=openembedded-core.git&a=commit;h=68c589f1b5ee36f0aff151b728447ffdae14622c
Author: Scott Garman <scott.a.garman at intel.com>
Date: Thu Mar 22 21:43:42 2012 -0700
useradd.bbclass: retry useradd/groupadd commands to avoid lock race issues
A race condition can occur when adding users and groups to the
passwd and group files, causing errors like the following:
ERROR: Function 'useradd_sysroot' failed
Tried to access "/etc/group" but this was locked.
This fix will cause the useradd code to retry the useradd and
groupadd commands up to 10 times (with a 1s sleep in between
attempts) before failing.
This fixes [YOCTO #1794]
Signed-off-by: Scott Garman <scott.a.garman at intel.com>
Signed-off-by: Richard Purdie <richard.purdie at linuxfoundation.org>
---
meta/classes/useradd.bbclass | 36 ++++++++++++++++++++++++++++++++++--
1 files changed, 34 insertions(+), 2 deletions(-)
diff --git a/meta/classes/useradd.bbclass b/meta/classes/useradd.bbclass
index 7981a68..0bbb371 100644
--- a/meta/classes/useradd.bbclass
+++ b/meta/classes/useradd.bbclass
@@ -45,7 +45,23 @@ if test "x$GROUPADD_PARAM" != "x"; then
groupname=`echo "$opts" | awk '{ print $NF }'`
group_exists=`grep "^$groupname:" $SYSROOT/etc/group || true`
if test "x$group_exists" = "x"; then
- eval $PSEUDO groupadd $OPT $opts
+ count=1
+ while true; do
+ eval $PSEUDO groupadd $OPT $opts || true
+ group_exists=`grep "^$groupname:" $SYSROOT/etc/group || true`
+ if test "x$group_exists" = "x"; then
+ # File locking issues can require us to retry the command
+ echo "WARNING: groupadd command did not succeed. Retrying..."
+ sleep 1
+ else
+ break
+ fi
+ count=`expr $count + 1`
+ if test $count = 11; then
+ echo "ERROR: tried running groupadd command 10 times without success, giving up"
+ exit 1
+ fi
+ done
else
echo "Note: group $groupname already exists, not re-creating it"
fi
@@ -70,7 +86,23 @@ if test "x$USERADD_PARAM" != "x"; then
username=`echo "$opts" | awk '{ print $NF }'`
user_exists=`grep "^$username:" $SYSROOT/etc/passwd || true`
if test "x$user_exists" = "x"; then
- eval $PSEUDO useradd $OPT $opts
+ count=1
+ while true; do
+ eval $PSEUDO useradd $OPT $opts || true
+ user_exists=`grep "^$username:" $SYSROOT/etc/passwd || true`
+ if test "x$user_exists" = "x"; then
+ # File locking issues can require us to retry the command
+ echo "WARNING: useradd command did not succeed. Retrying..."
+ sleep 1
+ else
+ break
+ fi
+ count=`expr $count + 1`
+ if test $count = 11; then
+ echo "ERROR: tried running useradd command 10 times without success, giving up"
+ exit 1
+ fi
+ done
else
echo "Note: username $username already exists, not re-creating it"
fi
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