For cmdline argument with numeric value, add a new function getargnum
It will get proper value with default value as $1, min value as $2,
max value as $3, and param name as $4. valid result will be echo to stdout.
for nul or value not valid it will just echo the default value.
Note: The values should be >=0
[v1->v2]: add arg <minval>
[v2->v3]: do not use bash string match =~
Signed-off-by: Dave Young <dyoung@xxxxxxxxxx>
---
modules.d/99base/dracut-lib.sh | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
--- dracut.orig/modules.d/99base/dracut-lib.sh
+++ dracut/modules.d/99base/dracut-lib.sh
@@ -167,6 +167,35 @@ getargbool() {
return 0
}
+isdigit() {
+ case "$1" in
+ *[!0-9]*|"") return 1;;
+ esac
+
+ return 0
+}
+
+# getargnum <defaultval> <minval> <maxval> <arg>
+# Will echo the arg if it's in range [minval - maxval].
+# If it's not set or it's not valid, will set it <defaultval>.
+# Note all values are required to be >= 0 here.
+# <defaultval> should be with [minval -maxval].
+getargnum() {
+ local _b
+ unset _b
+ local _default _min _max
+ _default=$1; shift
+ _min=$1; shift
+ _max=$1; shift
+ _b=$(getarg "$1")
+ [ $? -ne 0 -a -z "$_b" ] && _b=$_default
+ if [ -n "$_b" ]; then
+ isdigit "$_b" && _b=$(($_b)) && \
+ [[ $_b -ge $_min && $_b -le $_max ]] && echo $_b && return
+ fi
+ echo $_default
+}
+
_dogetargs() {
debug_off
local _o _found _key
--
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