From 3a9241add947cb6d24b5de7a8927517426a78795 Mon Sep 17 00:00:00 2001
From: Rob Landley <rob@landley.net>
Date: Sat, 25 Aug 2012 14:25:22 -0500
Subject: Move commands into "posix", "lsb", and "other" menus/directories.

---
 toys/posix/cmp.c | 92 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 toys/posix/cmp.c

(limited to 'toys/posix/cmp.c')

diff --git a/toys/posix/cmp.c b/toys/posix/cmp.c
new file mode 100644
index 00000000..0afca381
--- /dev/null
+++ b/toys/posix/cmp.c
@@ -0,0 +1,92 @@
+/* vi: set sw=4 ts=4:
+ *
+ * cmp.c - Compare two files.
+ *
+ * Copyright 2012 Timothy Elliott <tle@holymonkey.com>
+ *
+ * See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/cmp.html
+
+USE_CMP(NEWTOY(cmp, "<2>2ls", TOYFLAG_USR|TOYFLAG_BIN))
+
+config CMP
+	bool "cmp"
+	default y
+	help
+	  usage: cmp [-l] [-s] FILE1 FILE2
+
+	  Compare the contents of two files.
+
+	  -l show all differing bytes
+	  -s silent
+*/
+
+#include "toys.h"
+
+#define FLAG_s	1
+#define FLAG_l	2
+
+DEFINE_GLOBALS(
+	int fd;
+	char *name;
+)
+
+#define TT this.cmp
+
+// This handles opening the file and 
+
+void do_cmp(int fd, char *name)
+{
+	int i, len1, len2, min_len, size = sizeof(toybuf)/2;
+	long byte_no = 1, line_no = 1;
+	char *buf2 = toybuf+size;
+
+	// First time through, cache the data and return.
+	if (!TT.fd) {
+		TT.name = name;
+		// On return the old filehandle is closed, and this assures that even
+		// if we were called with stdin closed, the new filehandle != 0.
+		TT.fd = dup(fd);
+		return;
+	}
+
+	for (;;) {
+		len1 = readall(TT.fd, toybuf, size);
+		len2 = readall(fd, buf2, size);
+
+		min_len = len1 < len2 ? len1 : len2;
+		for (i=0; i<min_len; i++) {
+			if (toybuf[i] != buf2[i]) {
+				toys.exitval = 1;
+				if (toys.optflags & FLAG_l)
+					printf("%ld %o %o\n", byte_no, toybuf[i], buf2[i]);
+				else {
+					if (!(toys.optflags & FLAG_s)) {
+						printf("%s %s differ: char %ld, line %ld\n",
+							TT.name, name, byte_no, line_no);
+						toys.exitval++;
+					}
+					goto out;
+				}
+			}
+			byte_no++;
+			if (toybuf[i] == '\n') line_no++;
+		}
+		if (len1 != len2) {
+			if (!(toys.optflags & FLAG_s)) {
+				fprintf(stderr, "cmp: EOF on %s\n",
+					len1 < len2 ? TT.name : name);
+			}
+			toys.exitval = 1;
+			break;
+		}
+		if (len1 < 1) break;
+	}
+out:
+	if (CFG_TOYBOX_FREE) close(TT.fd);
+}
+
+void cmp_main(void)
+{
+	loopfiles_rw(toys.optargs, O_RDONLY, 0, toys.optflags&FLAG_s, do_cmp);
+}
+
-- 
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