On 06/09/2010 05:29 PM, Amadeusz Żołnowski wrote:
---
dracut-functions | 23 ++++++++++++-----------
1 files changed, 12 insertions(+), 11 deletions(-)
diff --git a/dracut-functions b/dracut-functions
index fbac282..500e3ae 100755
--- a/dracut-functions
+++ b/dracut-functions
@@ -27,19 +27,20 @@ strstr() { [[ $1 =~ $2 ]]; }
# Version comparision function. Returns result similar to C strcmp,
# but instead of -1 is 2. Function assumes version scheme like does
# Linux kernel.
+# $1< $2 -> 2
+# $1 = $2 -> 0
+# $1> $2 -> 1
+# To remember it easy, ask the question: Which argument is greater? ;-)
vercmp() {
- local n1 n2 i=1
-
- while true
- do
- n1=$(echo $1 | cut -d'.' -f$i)
- n2=$(echo $2 | cut -d'.' -f$i)
-
- [[ ! $n1&& ! $n2 ]]&& return 0
- [[ $n1 -lt $n2 ]]&& return 2
- [[ $n1 -gt $n2 ]]&& return 1
-
- ((i++))
+ local i n1=(${1//./ }) n2=(${2//./ })
+
+ for ((i=0; ; i++))
+ do
+ [[ ${n1[i]}&& ! ${n2[i]} ]]&& return 1
+ [[ ! ${n1[i]}&& ${n2[i]} ]]&& return 2
+ [[ ${n1[i]}&& ${n2[i]} ]] || return 0
+ ((${n1[i]}> ${n2[i]}))&& return 1
+ ((${n1[i]}< ${n2[i]}))&& return 2
done
}
pushed
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