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Port check_config from rhel6

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Resolves: bz805778

Simply the logic and optimize the code

Move check_exist, check_executable, rebuild_initrd to functions

remove BOOTDIR which is not used

Note: There might be modules which are newer than last built initramfs,
we always rebuild the initramfs when extra_moduels= is specified.

Signed-off-by: Dave Young <dyoung@redhat.com>
This commit is contained in:
Dave Young 2012-06-14 09:57:27 +08:00
parent b30eb78ab2
commit 836815ff67
1 changed files with 69 additions and 37 deletions
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106
kdumpctl
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@ -1,10 +1,6 @@
#! /bin/sh
KEXEC=/sbin/kexec
# Will be different for ia64, for example. For now, that architecture isn't
# supported. Code needs to be added here when we do.
BOOTDIR="/boot"
KDUMP_KERNELVER=""
KDUMP_COMMANDLINE=""
KEXEC_ARGS=""
@ -47,8 +43,43 @@ function save_core()
fi
}
function rebuild_initrd()
{
$MKDUMPRD $kdump_initrd $kdump_kver
if [ $? != 0 ]; then
echo "Failed to run mkdumprd"
$LOGGER "mkdumprd: failed to make kdump initrd"
return 1
fi
}
#$1: the files to be checked with IFS=' '
function check_exist()
{
for file in $1; do
if [ ! -f "$file" ]; then
echo -n "Error: $file not found."; echo
return 1
fi
done
}
#$1: the files to be checked with IFS=' '
function check_executable()
{
for file in $1; do
if [ ! -x "$file" ]; then
echo -n "Error: $file is not executable."; echo
return 1
fi
done
}
function check_config()
{
local extra_modules modified_files=""
local force_rebuild=0
if [ -z "$KDUMP_KERNELVER" ]; then
kdump_kver=`uname -r`
else
@ -58,45 +89,46 @@ function check_config()
kdump_kernel="${KDUMP_BOOTDIR}/${KDUMP_IMG}-${kdump_kver}${KDUMP_IMG_EXT}"
kdump_initrd="${KDUMP_BOOTDIR}/initramfs-${kdump_kver}kdump.img"
if [ ! -f $kdump_kernel ]; then
echo -n "No kdump kernel image found."; echo
echo "Tried to locate ${kdump_kernel}"
return 0
#will rebuild every time if extra_modules are specified
extra_modules=`grep ^extra_modules $KDUMP_CONFIG_FILE`
[ -n "$extra_modules" ] && force_rebuild=1
#check to see if dependent files has been modified
#since last build of the image file
if [ -f $kdump_initrd ]; then
image_time=`stat -c "%Y" $kdump_initrd 2>/dev/null`
else
image_time=0
fi
if [ ! -f $kdump_initrd ]; then
EXTRA_BINS=`grep ^extra_bins $KDUMP_CONFIG_FILE | cut -d\ -f2-`
files="$KDUMP_CONFIG_FILE $kdump_kernel $EXTRA_BINS"
check_exist "$files" && check_executable "$EXTRA_BINS"
[ $? -ne 0 ] && return 1
for file in $files; do
time_stamp=`stat -c "%Y" $file`
if [ "$time_stamp" -gt "$image_time" ]; then
modified_files="$modified_files $file"
fi
done
if [ $image_time -eq 0 ]; then
echo -n "No kdump initial ramdisk found."; echo
echo "Rebuilding $kdump_initrd"
$MKDUMPRD $kdump_initrd $kdump_kver
if [ $? != 0 ]; then
echo "Failed to run mkdumprd"
$LOGGER "mkdumprd: failed to make kdump initrd"
exit 1
fi
elif [ "$force_rebuild" -ne 0 ]; then
echo -n "Force rebuild $kdump_initrd"; echo
elif [ -n "$modified_files" ]; then
echo "Detected change(s) the following file(s):"
echo -n " "; echo "$modified_files" | sed 's/\s/\n /g'
else
return 0
fi
#check to see if config file has been modified after
#last build of the image file
config_time=0
if [ -f $KDUMP_CONFIG_FILE ]; then
config_time=`stat -c "%Y" $KDUMP_CONFIG_FILE`
fi
kernel_time=`stat -c "%Y" $kdump_kernel`
image_time=`stat -c "%Y" $kdump_initrd`
if [ "$config_time" -gt "$image_time" ] ||
[ "$kernel_time" -gt "$image_time" ]; then
echo "Detected $KDUMP_CONFIG_FILE or $kdump_kernel change"
echo "Rebuilding $kdump_initrd"
$MKDUMPRD $kdump_initrd $kdump_kver
if [ $? != 0 ]; then
echo "Failed to run mkdumprd"
$LOGGER "mkdumprd: failed to make kdump initrd"
return 1
fi
fi
echo "Rebuilding $kdump_initrd"
rebuild_initrd
return $?
}
# This function check iomem and determines if we have more than