From 1b88b85dbbb9fa04098ccd9f29384fb1199008e9 Mon Sep 17 00:00:00 2001
From: Bill Joy <bill@ucbvax.Berkeley.EDU>
Date: Thu, 2 Oct 1980 01:25:39 -0800
Subject: [PATCH] date and time created 80/10/01 17:25:39 by bill

SCCS-vsn: usr.bin/cmp/cmp.c 4.1
---
 usr/src/usr.bin/cmp/cmp.c | 122 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 122 insertions(+)
 create mode 100644 usr/src/usr.bin/cmp/cmp.c

diff --git a/usr/src/usr.bin/cmp/cmp.c b/usr/src/usr.bin/cmp/cmp.c
new file mode 100644
index 0000000000..820d94e877
--- /dev/null
+++ b/usr/src/usr.bin/cmp/cmp.c
@@ -0,0 +1,122 @@
+static char *sccsid = "@(#)cmp.c	4.1 (Berkeley) %G%";
+#include <stdio.h>
+#include <ctype.h>
+
+FILE	*file1,*file2;
+int	eflg;
+int	lflg	= 1;
+long	line	= 1;
+long	chr	= 0;
+long	skip1;
+long	skip2;
+
+long	otoi();
+
+main(argc, argv)
+char **argv;
+{
+	register c1, c2;
+	char *arg;
+
+	if(argc < 3)
+		goto narg;
+	arg = argv[1];
+	if(arg[0] == '-' && arg[1] == 's') {
+		lflg--;
+		argv++;
+		argc--;
+	}
+	arg = argv[1];
+	if(arg[0] == '-' && arg[1] == 'l') {
+		lflg++;
+		argv++;
+		argc--;
+	}
+	if(argc < 3)
+		goto narg;
+	arg = argv[1];
+	if( arg[0]=='-' && arg[1]==0 )
+		file1 = stdin;
+	else if((file1 = fopen(arg, "r")) == NULL)
+		goto barg;
+	arg = argv[2];
+	if((file2 = fopen(arg, "r")) == NULL)
+		goto barg;
+	if (argc>3)
+		skip1 = otoi(argv[3]);
+	if (argc>4)
+		skip2 = otoi(argv[4]);
+	while (skip1) {
+		if ((c1 = getc(file1)) == EOF) {
+			arg = argv[1];
+			goto earg;
+		}
+		skip1--;
+	}
+	while (skip2) {
+		if ((c2 = getc(file2)) == EOF) {
+			arg = argv[2];
+			goto earg;
+		}
+		skip2--;
+	}
+
+loop:
+	chr++;
+	c1 = getc(file1);
+	c2 = getc(file2);
+	if(c1 == c2) {
+		if (c1 == '\n')
+			line++;
+		if(c1 == EOF) {
+			if(eflg)
+				exit(1);
+			exit(0);
+		}
+		goto loop;
+	}
+	if(lflg == 0)
+		exit(1);
+	if(c1 == EOF) {
+		arg = argv[1];
+		goto earg;
+	}
+	if(c2 == EOF)
+		goto earg;
+	if(lflg == 1) {
+		printf("%s %s differ: char %ld, line %ld\n", argv[1], arg,
+			chr, line);
+		exit(1);
+	}
+	eflg = 1;
+	printf("%6ld %3o %3o\n", chr, c1, c2);
+	goto loop;
+
+narg:
+	printf("cmp: arg count\n");
+	exit(2);
+
+barg:
+	if (lflg)
+	printf("cmp: cannot open %s\n", arg);
+	exit(2);
+
+earg:
+	printf("cmp: EOF on %s\n", arg);
+	exit(1);
+}
+
+long otoi(s)
+char *s;
+{
+	long v;
+	int base;
+
+	v = 0;
+	base = 10;
+	if (*s == '0')
+		base = 8;
+	while(isdigit(*s))
+		v = v*base + *s++ - '0';
+	return(v);
+}
-- 
2.20.1