/*-
* 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[] = "$Id: rev.c,v 1.4 1996/07/02 20:08:07 janl 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);
}
