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- /*-
- * 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.
- */
-
- #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[] = "@(#)rev.c 5.2 (Berkeley) 3/21/92";
- #endif /* not lint */
-
- #include <sys/types.h>
- #include <errno.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
-
- void usage __P((void));
- void warn __P((const char *, ...));
-
- int
- main(argc, argv)
- int argc;
- char *argv[];
- {
- register char *filename, *p, *t;
- 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++;
- }
- while (p = fgetline(fp, &len)) {
- t = p + len - 1;
- for (t = p + len - 1; t >= p; --t)
- putchar(*t);
- 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);
- }
-