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- /*
- * Copyright (c) 1989 The Regents of the University of California.
- * All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kevin Fall.
- *
- * 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) 1989 The Regents of the University of California.\n\
- All rights reserved.\n";
- #endif /* not lint */
-
- #ifndef lint
- static char sccsid[] = "@(#)cat.c 5.15 (Berkeley) 5/23/91";
- #endif /* not lint */
-
- #include <sys/param.h>
- #include <sys/stat.h>
- #include <fcntl.h>
- #include <errno.h>
- #include <unistd.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <ctype.h>
-
- int bflag, eflag, nflag, sflag, tflag, vflag;
- int rval;
- char *filename;
-
- void cook_args(), cook_buf(), raw_args(), raw_cat();
- void err __P((int, const char *, ...));
-
- main(argc, argv)
- int argc;
- char **argv;
- {
- extern int optind;
- int ch;
-
- while ((ch = getopt(argc, argv, "benstuv")) != EOF)
- switch (ch) {
- case 'b':
- bflag = nflag = 1; /* -b implies -n */
- break;
- case 'e':
- eflag = vflag = 1; /* -e implies -v */
- break;
- case 'n':
- nflag = 1;
- break;
- case 's':
- sflag = 1;
- break;
- case 't':
- tflag = vflag = 1; /* -t implies -v */
- break;
- case 'u':
- setbuf(stdout, (char *)NULL);
- break;
- case 'v':
- vflag = 1;
- break;
- case '?':
- (void)fprintf(stderr,
- "usage: cat [-benstuv] [-] [file ...]\n");
- exit(1);
- }
- argv += optind;
-
- if (bflag || eflag || nflag || sflag || tflag || vflag)
- cook_args(argv);
- else
- raw_args(argv);
- if (fclose(stdout))
- err(1, "stdout: %s", strerror(errno));
- exit(rval);
- }
-
- void
- cook_args(argv)
- char **argv;
- {
- register FILE *fp;
-
- fp = stdin;
- filename = "stdin";
- do {
- if (*argv) {
- if (!strcmp(*argv, "-"))
- fp = stdin;
- else if (!(fp = fopen(*argv, "r"))) {
- err(0, "%s: %s", *argv, strerror(errno));
- ++argv;
- continue;
- }
- filename = *argv++;
- }
- cook_buf(fp);
- if (fp != stdin)
- (void)fclose(fp);
- } while (*argv);
- }
-
- void
- cook_buf(fp)
- register FILE *fp;
- {
- register int ch, gobble, line, prev;
-
- line = gobble = 0;
- for (prev = '\n'; (ch = getc(fp)) != EOF; prev = ch) {
- if (prev == '\n') {
- if (ch == '\n') {
- if (sflag) {
- if (!gobble && putchar(ch) == EOF)
- break;
- gobble = 1;
- continue;
- }
- if (nflag && !bflag) {
- (void)fprintf(stdout, "%6d\t", ++line);
- if (ferror(stdout))
- break;
- }
- } else if (nflag) {
- (void)fprintf(stdout, "%6d\t", ++line);
- if (ferror(stdout))
- break;
- }
- }
- gobble = 0;
- if (ch == '\n') {
- if (eflag)
- if (putchar('$') == EOF)
- break;
- } else if (ch == '\t') {
- if (tflag) {
- if (putchar('^') == EOF || putchar('I') == EOF)
- break;
- continue;
- }
- } else if (vflag) {
- if (!isascii(ch)) {
- if (putchar('M') == EOF || putchar('-') == EOF)
- break;
- ch = toascii(ch);
- }
- if (iscntrl(ch)) {
- if (putchar('^') == EOF ||
- putchar(ch == '\177' ? '?' :
- ch | 0100) == EOF)
- break;
- continue;
- }
- }
- if (putchar(ch) == EOF)
- break;
- }
- if (ferror(fp)) {
- err(0, "%s: %s", strerror(errno));
- clearerr(fp);
- }
- if (ferror(stdout))
- err(1, "stdout: %s", strerror(errno));
- }
-
- void
- raw_args(argv)
- char **argv;
- {
- register int fd;
-
- fd = fileno(stdin);
- filename = "stdin";
- do {
- if (*argv) {
- if (!strcmp(*argv, "-"))
- fd = fileno(stdin);
- else if ((fd = open(*argv, O_RDONLY, 0)) < 0) {
- err(0, "%s: %s", *argv, strerror(errno));
- ++argv;
- continue;
- }
- filename = *argv++;
- }
- raw_cat(fd);
- if (fd != fileno(stdin))
- (void)close(fd);
- } while (*argv);
- }
-
- void
- raw_cat(rfd)
- register int rfd;
- {
- register int nr, nw, off, wfd;
- static int bsize;
- static char *buf;
- struct stat sbuf;
-
- wfd = fileno(stdout);
- if (!buf) {
- if (fstat(wfd, &sbuf))
- err(1, "%s: %s", filename, strerror(errno));
- bsize = MAX(sbuf.st_blksize, 1024);
- if (!(buf = malloc((u_int)bsize)))
- err(1, "%s", strerror(errno));
- }
- while ((nr = read(rfd, buf, bsize)) > 0)
- for (off = 0; off < nr; nr -= nw, off += nw)
- if ((nw = write(wfd, buf + off, nr)) < 0)
- err(1, "stdout");
- if (nr < 0)
- err(0, "%s: %s", filename, strerror(errno));
- }
-
- #if __STDC__
- #include <stdarg.h>
- #else
- #include <varargs.h>
- #endif
-
- void
- #if __STDC__
- err(int ex, const char *fmt, ...)
- #else
- err(ex, fmt, va_alist)
- int ex;
- char *fmt;
- va_dcl
- #endif
- {
- va_list ap;
- #if __STDC__
- va_start(ap, fmt);
- #else
- va_start(ap);
- #endif
- (void)fprintf(stderr, "cat: ");
- (void)vfprintf(stderr, fmt, ap);
- va_end(ap);
- (void)fprintf(stderr, "\n");
- if (ex)
- exit(1);
- rval = 1;
- }
-