Add a `-s' flag for `silent' processing. Make the script return 0 for

success and 1 for failure.  Describe the options in manpage.

2 files changed, 28 insertions, 5 deletions

diff --git a/usr.bin/which/which.1 b/usr.bin/which/which.1
index 757ae1e..234fe47 100644
--- a/usr.bin/which/which.1
+++ b/usr.bin/which/which.1
@@ -27,7 +27,7 @@
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 .\" OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.\" $Id$
+.\" $Id: which.1,v 1.1 1995/01/26 21:49:48 jkh Exp $
 .Dd January 26, 1995
 .Dt WHICH 1
 .Os FreeBSD
@@ -36,12 +36,22 @@
 .Nd "locate a program file in the user's path"
 .Sh SYNOPSIS
 .Nm which
+.Op Fl as
 .Op Ar command
 .Ar ...
 .Sh DESCRIPTION
 .Nm Which
 takes a list of command names and searches the path for each executable
 file that would be run had these commands actually been invoked.
+.Pp
+The following options are available:
+.Bl -tag -width indent
+.It Fl a
+List all instances of executables found (instead of just the first one
+of each).
+.It Fl s
+No output, just return 0 if any of the executables are found, or 1 if
+none are found.
 .Sh HISTORY
 The
 .Nm
diff --git a/usr.bin/which/which.pl b/usr.bin/which/which.pl
index 757da9b..bd24a2a 100755
--- a/usr.bin/which/which.pl
+++ b/usr.bin/which/which.pl
@@ -31,22 +31,35 @@
 #
 # [whew!]
 #
-# $Id: which.sh,v 1.1.1.1 1995/01/25 19:18:33 jkh Exp $
+# $Id: which.pl,v 1.1 1995/01/26 21:49:54 jkh Exp $
 
 $all = 0;
+$silent = 0;
+$found = 0;
 @path = split(/:/, $ENV{'PATH'});
 
 if ($ARGV[0] eq "-a") {
     $all = 1; shift @ARGV;
+} elsif ($ARGV[0] eq "-s") {
+    $silent = 1; shift @ARGV;
 } elsif ($ARGV[0] =~ /^-(h|help|\?)$/) {
-    die "usage:\n\twhich [-a] program ...\n";
+    die "usage:\n\twhich [-a] [-s] program ...\n";
 }
 
 foreach $prog (@ARGV) {
     foreach $e (@path) {
         if (-x "$e/$prog") {
-            print "$e/$prog\n";
-            last unless $all;
+	    if (! $silent) {
+		print "$e/$prog\n";
+	    }
+	    $found = 1;
+	    last unless $all;
         }
     }
 }
+
+if ($found) {
+    exit 0;
+} else {
+    exit 1;
+}