From 6dbe3af945a63f025561abb83275cee9ff06c57b Mon Sep 17 00:00:00 2001 From: Karel Zak Date: Thu, 7 Dec 2006 00:25:32 +0100 Subject: Imported from util-linux-2.2 tarball. --- text-utils/rev.c | 159 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 159 insertions(+) create mode 100644 text-utils/rev.c (limited to 'text-utils/rev.c') 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 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 +#include +#include +#include +#include +#ifdef linux +#include +#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 +#else +#include +#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); +} -- cgit v1.2.3-55-g7522