bin/which performance improvement

BIN/WHICH.txt

@@ -1,6 +1,3 @@
-NEW
-  PREFIX
-AUTO 4,1
 #!/bin/sh
 #
 # which
@@ -10,8 +7,10 @@ AUTO 4,1
 
 set -E
 
-if [ -z $1 ]
-    echo "USAGE: which program ..."
+if [ -z $1 ] or [ $1 = "-h" ] or [ $1 = "-H" ]
+    echo "Usage : which [options] program ..."
+    echo "   -A show all found"
+    echo "   -S no output, 0 if found, 1 if not"
     exit 120
 fi
 
@@ -37,7 +36,7 @@ while [ ${L} -eq 1 ]
 loop
 
 # split dirs in path
-echo ${PATH} > ${T}
+echo "${PATH}:." > ${T}
 set L = `sed "s/:/ /" ${T}`
 rm -q -c ${T}*
 
@@ -46,16 +45,18 @@ while [ $# -gt 0 ]
     set F = ${F} + 1
     for D in ${L}
         # check for file
-        if [ ${S} -eq 0 ]
-            ls -f ${D}$1
-            set T = $?
+        if [ -f ${D}$1 ]
+            set T = 0
         else
-            ls -f ${D}$1 > /dev/null
-            set T = $?
+            set T = 1
         fi
 
         # process result
         if [ ${T} -eq 0 ]
+            if [ ${S} -eq 0 ]
+                echo "${D}$1"
+            fi
+
             set F = ${F} - 1
             if [ ${A} -eq 0 ]
                 break
@@ -73,5 +74,3 @@ if [ ${S} -gt 0 ]
         exit 70
 fi
 
-MAN
-TEXT /BIN/which