diff options
Diffstat (limited to 'bin/cat/cat.c')
| -rw-r--r-- | bin/cat/cat.c | 282 |
1 files changed, 282 insertions, 0 deletions
diff --git a/bin/cat/cat.c b/bin/cat/cat.c new file mode 100644 index 000000000000..39196e225b15 --- /dev/null +++ b/bin/cat/cat.c @@ -0,0 +1,282 @@ +/* + * 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 __P((char **)); +void cook_buf __P((FILE *)); +void raw_args __P((char **)); +void raw_cat __P((int)); +void err __P((int, const char *, ...)); + +int +main(argc, argv) + int argc; + char **argv; +{ + extern int optind; + int ch; + + while ((ch = getopt(argc, argv, "benstuv")) != -1) + 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; + default: + 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", filename, 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; +} |