[BusyBox] Support for old style options in head and tail

[Robert Griebl]

The following patches add support for the old style count options to both 
head and tail. With these patches, converting GNU scripts to bb becomes much 
more simple, since the "head -1 / tail -1" syntax is used very often.

Any objections against applying these to CVS head ?

-- 
cu
Robert

--
Real programmers dont write documentation -
leave that to the maintenance people.



Index: textutils/head.c
===================================================================
RCS file: /var/cvs/busybox/textutils/head.c,v
retrieving revision 1.26
diff -u -3 -p -r1.26 head.c
--- textutils/head.c	24 Oct 2001 05:00:26 -0000	1.26
+++ textutils/head.c	16 May 2002 00:17:47 -0000
@@ -47,12 +47,17 @@ int head_main(int argc, char **argv)
 	FILE *fp;
 	int need_headers, opt, len = 10, status = EXIT_SUCCESS;
 
+	if (( argc >= 2 ) && ( strlen ( argv [1] ) >= 2 ) && ( argv [1][0] == '-' ) 
&& isdigit ( argv [1][1] )) {
+		len = atoi ( &argv [1][1] );
+		optind = 2;
+	}
+
 	/* parse argv[] */
 	while ((opt = getopt(argc, argv, "n:")) > 0) {
 		switch (opt) {
Index: textutils/tail.c
===================================================================
RCS file: /var/cvs/busybox/textutils/tail.c,v
retrieving revision 1.40
diff -u -3 -p -r1.40 tail.c
--- textutils/tail.c	24 Oct 2001 05:00:27 -0000	1.40
+++ textutils/tail.c	16 May 2002 00:17:47 -0000
@@ -68,6 +68,11 @@ int tail_main(int argc, char **argv)
 	char *s, *start, *end, buf[BUFSIZ];
 	int i, opt;
 
+	if (( argc >= 2 ) && ( strlen ( argv [1] ) >= 2 ) && ( argv [1][0] == '-' ) 
&& isdigit ( argv [1][1] )) {
+		count = atoi ( &argv [1][1] );
+		optind = 2;
+	}
+
 	while ((opt = getopt(argc, argv, "c:fhn:q:s:v")) > 0) {
 		switch (opt) {
 			case 'f':