Allow specifying a match in program output.

Use the -g flag to specify a string to grep for instead of just the
program name.

diff --git a/opt/bin/find_working b/opt/bin/find_working
index 77bf17e..454e365 100755 (executable)
--- a/opt/bin/find_working
+++ b/opt/bin/find_working
@@ -4,6 +4,7 @@
 # Usage: find_working [options] <prog>
 # Options: -A          Don't test arguments to executable files.
 #          -a <args>   Use arguments to test executable files.  Default --help.
+#          -g <re>     Search string in <args> output.  Default <prog>.
 #          -q          Don't print path to prog.  Just exit 0 if found.
 #          -x          Don't try to execute unreadable files.  Assume success.
 #          -X          Don't try to execute unreadable files.  Assume failure.
@@ -12,10 +13,12 @@
 args="-h -? --help"
 quiet=0
 unreadable=
-while getopts ":Aa:qxX" opt; do
+re=
+while getopts ":Aa:g:qxX" opt; do
   case $opt in
     A) args="";;
     a) args="$OPTARG";;
+    g) re="$OPTARG";;
     q) quiet=1;;
     x) unreadable=0;;
     X) unreadable=1;;
@@ -28,12 +31,15 @@ if [ -z "$prog" ]; then
   echo >&2 "Usage: find_working [options] <prog>"
   echo >&2 "Options: -A          Don't test arguments to executable files."
   echo >&2 "         -a <args>   Use arguments to test executable files.  Default --help."
+  echo >&2 "         -g <re>     Search string in <args> output.  Default <prog>."
   echo >&2 "         -q          Don't print path to prog.  Just exit 0 if found."
   echo >&2 "         -x          Don't try to execute unreadable files.  Assume success."
   echo >&2 "         -X          Don't try to execute unreadable files.  Assume failure."
   exit 1
 fi
 
+[ -z "$re" ] && re="\\b$prog\\b"
+
 # Default args contain -? which might be interpreted as a glob.
 set -o noglob
 
@@ -43,14 +49,14 @@ for path in ${PATH//:/ }; do
 
   if [ -r "$path/$prog" ]; then
     if [ -n "$args" ]; then
-      "$path/$prog" $args 2>&1 | grep "\\b$prog\\b" >/dev/null || continue
+      "$path/$prog" $args 2>&1 | grep "$re" >/dev/null || continue
     else
       ldd "$path/$prog" 2>/dev/null | grep "not found" >/dev/null && continue
     fi
     ret="$path/$prog"
     break
   elif [ -z "$unreadable" ]; then
-    "$path/$prog" $args 2>&1 | grep "\\b$prog\\b" >/dev/null || continue
+    "$path/$prog" $args 2>&1 | grep "$re" >/dev/null || continue
     ret="$path/$prog"
     break
   elif [ $unreadable = 0 ]; then