Make compatible with standard what command:

    Implement -s option
    Keep going if a file is not found
    Append ':' to printed filenames
    Include backslash in terminal characters
    Make exit status dependent on a match having been found
    Revise manpage accordingly

2 files changed, 54 insertions, 27 deletions

diff --git a/usr.bin/what/what.1 b/usr.bin/what/what.1
index 53930cc..7e369a9 100644
--- a/usr.bin/what/what.1
+++ b/usr.bin/what/what.1
@@ -31,7 +31,7 @@
 .\"
 .\"     @(#)what.1	8.1 (Berkeley) 6/6/93
 .\"
-.\" $Id: what.1,v 1.7 1997/08/26 07:04:20 charnier Exp $
+.\" $Id: what.1,v 1.8 1998/04/14 06:31:23 phk Exp $
 .\"
 .Dd June 6, 1993
 .Dt WHAT 1
@@ -40,30 +40,34 @@
 .Nm what
 .Nd "show what versions of object modules were used to construct a file"
 .Sh SYNOPSIS
-.Nm what
-.Ar name Ar ...
+.Nm
+.Op Fl s
+.Ar file Ar ...
 .Sh DESCRIPTION
-.Nm What
-reads each file
-.Ar name
-and searches for sequences of the form
+The
+.Nm
+utility searches each specified
+.Ar file
+for sequences of the form
 .Dq \&@(#)
 as inserted by the source code control system.  It prints the remainder
-of the string following this marker, up to a null character, newline, double
-quote, or
+of the string following this marker, up to a NUL character, newline, double
+quote,
 .Dq \&>
-character.
+character, or backslash.
+.Pp
+The following option is available:
+.Bl -tag -width Ds
+.It Fl s
+Stop searching each file after the first match.
+.El
+.Pp
+Exit status is 0 if any matches were found, otherwise 1.
 .Sh BUGS
-As
-.Bx
-is not licensed to distribute
+This is a rewrite of the
 .Tn SCCS
-this is a rewrite of the
-.Nm
-command which is part of
-.Tn SCCS ,
-and may not behave exactly the same as that
-command does.
+command of the same name,
+and behavior may not be identical.
 .Sh SEE ALSO
 .Xr ident 1 ,
 .Xr strings 1
diff --git a/usr.bin/what/what.c b/usr.bin/what/what.c
index 91f114d..ebc4d11 100644
--- a/usr.bin/what/what.c
+++ b/usr.bin/what/what.c
@@ -42,32 +42,52 @@ static const char copyright[] =
 static char sccsid[] = "@(#)what.c	8.1 (Berkeley) 6/6/93";
 #endif
 static const char rcsid[] =
-	"$Id$";
+	"$Id: what.c,v 1.3 1997/08/25 06:49:45 charnier Exp $";
 #endif /* not lint */
 
 #include <err.h>
 #include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+static int sflag;
+static int found;
 
 void search __P((void));
 
 /*
  * what
  */
-/* ARGSUSED */
 int
 main(argc, argv)
 	int argc;
 	char **argv;
 {
-	if (!*++argv)
+	int c;
+
+	while ((c = getopt(argc, argv, "s")) != -1)
+		switch (c) {
+		case 's':
+			sflag = 1;
+			break;
+		default:
+			(void)fprintf(stderr,
+			    "usage: what [-s] file ...\n");
+			exit(1);
+		}
+	argv += optind;
+
+	if (!*argv)
 		search();
 	else do {
 		if (!freopen(*argv, "r", stdin))
-			err(1, "%s", *argv);
-		printf("%s\n", *argv);
-		search();
+			warn("%s", *argv);
+		else {
+			printf("%s:\n", *argv);
+			search();
+		}
 	} while(*++argv);
-	exit(0);
+	exit(!found);
 }
 
 void
@@ -86,8 +106,11 @@ loop:		if (c != '@')
 			goto loop;
 		putchar('\t');
 		while ((c = getchar()) != EOF && c && c != '"' &&
-		    c != '>' && c != '\n')
+		    c != '>' && c != '\\' && c != '\n')
 			putchar(c);
 		putchar('\n');
+		found = 1;
+		if (sflag)
+			return;
 	}
 }