openwrtv3/include/shell.sh
Felix Fietkau d4754e1eb5 Revert "include/shell.sh: remove getvar()"
It is more widely used than I thought.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 43068
2014-10-26 16:18:24 +00:00

37 lines
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getvar() {
eval "echo \"\${$1}\""
}
var2file() {
local var
eval "var=\"\${$1}\""
if [ -n "$var" ]; then echo "$var" > "$2"; fi
}
isset() {
local var
eval "var=\"\${$1}\""
[ -n "$var" ]
}
trapret() {(
local retvals="$1"; shift
local cmd="$1"; shift
for retval in $(echo $retvals); do
local trap_$retval=1
done
"$cmd" "$@" || {
local retval="$?"
eval "trapped=\${trap_$retval}"
[ -n "$trapped" ] || {
return $retval
}
}
)}
md5s() {
cat "$@" | (
md5sum 2>/dev/null ||
md5
) | awk '{print $1}'
}