+/*
+ * 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;
+}
projects / unix-history / commitdiff