Replace fixed path with a POSIX-compliant shell function to check the existence of a command

1 files changed, 22 insertions, 1 deletions

diff --git a/debian/sane-utils.postinst b/debian/sane-utils.postinst
index 83857a6..f3e5f2d 100644
--- a/debian/sane-utils.postinst
+++ b/debian/sane-utils.postinst
@@ -8,6 +8,26 @@ saned_eh () {
     echo "saned couldn't start; check your inetd configuration and README.Debian"
 }
 
+#
+# POSIX-compliant shell function
+# to check for the existence of a command
+# Return 0 if found
+#
+pathfind() {
+    OLDIFS="$IFS"
+    IFS=:
+    for p in $PATH; do
+        if [ -x "$p/$*" ]; then
+            IFS="$OLDIFS"
+            return 0
+        fi
+    done
+    IFS="$OLDIFS"
+    return 1
+}
+
+
+
 if [ "$1" = "configure" ] || [ "$1" = "reconfigure" ]; then
     db_get sane-utils/saned_run
     RUN_SANED="$RET"
@@ -16,7 +36,8 @@ if [ "$1" = "configure" ] || [ "$1" = "reconfigure" ]; then
     SANED_IN_SCANNER="$RET"
 
     # Add saned service, disabled by default
-    if [ -x /usr/sbin/update-inetd ]; then
+    pathfind update-inetd
+    if [ $? = 0 ]; then
 	update-inetd --add "#<off># sane-port\tstream\ttcp\tnowait\tsaned:saned\t/usr/sbin/saned saned"
     fi