Imported from util-linux-2.2 tarball.

1 files changed, 159 insertions, 0 deletions

diff --git a/text-utils/rev.c b/text-utils/rev.c
new file mode 100644
index 000000000..9fd22e0f3
--- /dev/null
+++ b/text-utils/rev.c
@@ -0,0 +1,159 @@
+/*-
+ * Copyright (c) 1987, 1992 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.
+ *
+ * Modified for Linux by Charles Hannum (mycroft@gnu.ai.mit.edu)
+ *                   and Brian Koehmstedt (bpk@gnu.ai.mit.edu)
+ *
+ * Wed Sep 14 22:26:00 1994: Patch from bjdouma <bjdouma@xs4all.nl> to handle
+ *                           last line that has no newline correctly.
+ */
+
+#ifndef lint
+char copyright[] =
+"@(#) Copyright (c) 1987, 1992 The Regents of the University of California.\n\
+ All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+/*static char sccsid[] = "from: @(#)rev.c	5.2 (Berkeley) 3/21/92";*/
+static char rcsid[] = "rev.c,v 1.1.1.1 1995/02/22 19:09:19 faith Exp";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#ifdef linux
+#include <unistd.h>
+#endif /* linux */
+
+void usage __P((void));
+void warn __P((const char *, ...));
+
+int
+main(argc, argv)
+	int argc;
+	char *argv[];
+{
+	register char *filename, *t;
+#ifdef linux
+	char p[512];
+#else /* linux */
+	char *p;
+#endif /* linux */
+	FILE *fp;
+	size_t len;
+	int ch, rval;
+
+	while ((ch = getopt(argc, argv, "")) != EOF)
+		switch(ch) {
+		case '?':
+		default:
+			usage();
+		}
+
+	argc -= optind;
+	argv += optind;
+
+	fp = stdin;
+	filename = "stdin";
+	rval = 0;
+	do {
+		if (*argv) {
+			if ((fp = fopen(*argv, "r")) == NULL) {
+				warn("%s: %s", *argv, strerror(errno));
+				rval = 1;
+				++argv;
+				continue;
+			}
+			filename = *argv++;
+		}
+#ifndef linux
+		while (p = fgetline(fp, &len)) {
+			t = p + len - 1;
+			for (t = p + len - 1; t >= p; --t)
+				putchar(*t);
+		}
+#else /* linux */
+		while (fgets(p, 511, fp)) {
+			len = strlen(p);
+                        t = p + len - 1 - (*(p+len-1)=='\r'
+					   || *(p+len-1)=='\n');
+                        for ( ; t >= p; --t)
+				if(strcmp(t, '\0') != 0)
+				  putchar(*t);
+#endif /* linux */
+			putchar('\n');
+		}
+		if (ferror(fp)) {
+			warn("%s: %s", filename, strerror(errno));
+			rval = 1;
+		}
+		(void)fclose(fp);
+	} while(*argv);
+	exit(rval);
+}
+
+#if __STDC__
+#include <stdarg.h>
+#else
+#include <varargs.h>
+#endif
+
+void
+#if __STDC__
+warn(const char *fmt, ...)
+#else
+warn(fmt, va_alist)
+	char *fmt;
+        va_dcl
+#endif
+{
+	va_list ap;
+#if __STDC__
+	va_start(ap, fmt);
+#else
+	va_start(ap);
+#endif
+	(void)fprintf(stderr, "rev: ");
+	(void)vfprintf(stderr, fmt, ap);
+	va_end(ap);
+	(void)fprintf(stderr, "\n");
+}
+
+void
+usage()
+{
+	(void)fprintf(stderr, "usage: rev [file ...]\n");
+	exit(1);
+}