Imported BSD-licensed rev(1) from FreeBSD (uses brand new getopt())

commands/simple/Makefile

@@ -140,6 +140,7 @@ ALL	= \
 	rcp \
 	rdate \
 	readall \
+	rev \
 	readfs \
 	remsync \
 	rget \
@@ -601,6 +602,10 @@ rdate:	rdate.c
 	$(CCLD) -o $@ rdate.c
 	@install -S 8kw $@
 
+rev:	rev.c
+	$(CCLD) -o $@ rev.c
+	@install -S 8kw $@
+
 readall:	readall.c
 	$(CCLD) -o $@ $?
 	@install -S 4kw $@
@@ -821,6 +826,7 @@ install:	\
 	/usr/bin/at \
 	/usr/bin/backup \
 	/usr/bin/restore \
+	/usr/bin/rev \
 	/usr/bin/badblocks \
 	/usr/bin/banner \
 	/usr/bin/basename \
@@ -1364,6 +1370,9 @@ install:	\
 /usr/bin/remsync:	remsync
 	install -cs -o bin $? $@
 
+/usr/bin/rev:	rev
+	install -cs -o bin $? $@
+
 /usr/bin/rget:	rget
 	install -cs -o bin $? $@
 

commands/simple/rev.c

@@ -0,0 +1,108 @@
+/*-
+ * Copyright (c) 1987, 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static const char copyright[] =
+"@(#) Copyright (c) 1987, 1992, 1993\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#include <sys/types.h>
+
+#include <errno.h>
+#include <locale.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+void usage(void);
+
+int
+main(int argc, char *argv[])
+{
+	const char *filename;
+	char p[2000], *t;
+	FILE *fp;
+	size_t len;
+	int ch, rval;
+
+	setlocale(LC_ALL, "");
+
+	while ((ch = getopt(argc, argv, "")) != -1)
+		switch(ch) {
+		case '?':
+		default:
+			usage();
+		}
+
+	argc -= optind;
+	argv += optind;
+
+	fp = stdin;
+	filename = "stdin";
+	rval = 0;
+	do {
+		if (*argv) {
+			if ((fp = fopen(*argv, "r")) == NULL) {
+				perror(*argv);
+				rval = 1;
+				++argv;
+				continue;
+			}
+			filename = *argv++;
+		}
+		while ((fgets(p, sizeof(p)-1, fp)) != NULL) {
+			len = strlen(p);
+			if (p[len - 1] == '\n')
+				--len;
+			t = p + len - 1;
+			for (t = p + len - 1; t >= p; --t)
+				putchar(*t);
+			putchar('\n');
+		}
+		if (ferror(fp)) {
+			perror(filename);
+			rval = 1;
+		}
+		(void)fclose(fp);
+	} while(*argv);
+	exit(rval);
+}
+
+void
+usage(void)
+{
+	(void)fprintf(stderr, "usage: rev [file ...]\n");
+	exit(1);
+}