usr/utils/cat.c

/* $NetBSD: cat.c,v 1.43 2004/01/04 03:31:28 jschauma Exp $	*/

/*
 * Copyright (c) 1989, 1993
 *	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. 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 __COPYRIGHT
#define __COPYRIGHT(arg)
#endif
#ifndef __RCSID
#define __RCSID(arg)
#endif

#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif

#ifndef __KLIBC__
#include <sys/cdefs.h>
#endif
#if !defined(lint)
__COPYRIGHT("@(#) Copyright (c) 1989, 1993\n\
	The Regents of the University of California.  All rights reserved.\n");
#if 0
static char sccsid[] = "@(#)cat.c	8.2 (Berkeley) 4/27/95";
#else
__RCSID("$NetBSD: cat.c,v 1.43 2004/01/04 03:31:28 jschauma Exp $");
#endif
#endif				/* not lint */

#include <sys/param.h>
#include <sys/stat.h>

#include <ctype.h>
#ifndef __KLIBC__
#include <err.h>
#endif
#include <errno.h>
#include <fcntl.h>
#ifndef __KLIBC__
#include <locale.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

int bflag, eflag, fflag, lflag, nflag, sflag, tflag, vflag;
int rval;
const char *filename;

int main(int, char *[]);
void cook_args(char *argv[]);
void cook_buf(FILE *);
void raw_args(char *argv[]);
void raw_cat(int);

int main(int argc, char *argv[])
{
	int ch;
	struct flock stdout_lock;

#ifndef __KLIBC__
	setprogname(argv[0]);
	(void)setlocale(LC_ALL, "");
#endif

	while ((ch = getopt(argc, argv, "beflnstuv")) != -1)
		switch (ch) {
		case 'b':
			bflag = nflag = 1;	/* -b implies -n */
			break;
		case 'e':
			eflag = vflag = 1;	/* -e implies -v */
			break;
		case 'f':
			fflag = 1;
			break;
		case 'l':
			lflag = 1;
			break;
		case 'n':
			nflag = 1;
			break;
		case 's':
			sflag = 1;
			break;
		case 't':
			tflag = vflag = 1;	/* -t implies -v */
			break;
		case 'u':
#ifndef __KLIBC__
			setbuf(stdout, NULL);
#endif
			break;
		case 'v':
			vflag = 1;
			break;
		default:
		case '?':
			(void)fprintf(stderr,
				      "usage: cat [-beflnstuv] [-] [file ...]\n");
			exit(1);
			/* NOTREACHED */
		}
	argv += optind;

	if (lflag) {
		stdout_lock.l_len = 0;
		stdout_lock.l_start = 0;
		stdout_lock.l_type = F_WRLCK;
		stdout_lock.l_whence = SEEK_SET;
		if (fcntl(STDOUT_FILENO, F_SETLKW, &stdout_lock) == -1) {
			perror("fcntl");
			exit(1);
		}
	}

	if (bflag || eflag || nflag || sflag || tflag || vflag)
		cook_args(argv);
	else
		raw_args(argv);
	if (fclose(stdout)) {
		perror("fclose");
		exit(1);
	}
	exit(rval);
	/* NOTREACHED */
}

void cook_args(char **argv)
{
	FILE *fp;

	fp = stdin;
	filename = "stdin";
	do {
		if (*argv) {
			if (!strcmp(*argv, "-"))
				fp = stdin;
			else if ((fp = fopen(*argv,
					     fflag ? "rf" : "r")) == NULL) {
				perror("fopen");
				rval = 1;
				++argv;
				continue;
			}
			filename = *argv++;
		}
		cook_buf(fp);
		if (fp != stdin)
			(void)fclose(fp);
	} while (*argv);
}

void cook_buf(FILE * fp)
{
	int ch, gobble, line, prev;
	int stdout_err = 0;

	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) {
					if (!bflag) {
						if (fprintf(stdout,
							    "%6d\t",
							    ++line) < 0) {
							stdout_err++;
							break;
						}
					} else if (eflag) {
						if (fprintf(stdout,
							    "%6s\t", "") < 0) {
							stdout_err++;
							break;
						}
					}
				}
			} else if (nflag) {
				if (fprintf(stdout, "%6d\t", ++line) < 0) {
					stdout_err++;
					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 = (ch) & 0x7f;
			}
			if (iscntrl(ch)) {
				if (putchar('^') == EOF ||
				    putchar(ch == '\177' ? '?' :
					    ch | 0100) == EOF)
					break;
				continue;
			}
		}
		if (putchar(ch) == EOF)
			break;
	}
	if (stdout_err) {
		perror(filename);
		rval = 1;
	}
}

void raw_args(char **argv)
{
	int fd;

	fd = fileno(stdin);
	filename = "stdin";
	do {
		if (*argv) {
			if (!strcmp(*argv, "-"))
				fd = fileno(stdin);
			else if (fflag) {
				struct stat st;
				fd = open(*argv, O_RDONLY | O_NONBLOCK, 0);
				if (fd < 0)
					goto skip;

				if (fstat(fd, &st) == -1) {
					close(fd);
					goto skip;
				}
				if (!S_ISREG(st.st_mode)) {
					close(fd);
					errno = EINVAL;
					goto skipnomsg;
				}
			} else if ((fd = open(*argv, O_RDONLY, 0)) < 0) {
			      skip:
				perror(*argv);
			      skipnomsg:
				rval = 1;
				++argv;
				continue;
			}
			filename = *argv++;
		}
		raw_cat(fd);
		if (fd != fileno(stdin))
			(void)close(fd);
	} while (*argv);
}

void raw_cat(int rfd)
{
	static char *buf;
	static char fb_buf[BUFSIZ];
	static size_t bsize;

	struct stat sbuf;
	ssize_t nr, nw, off;
	int wfd;

	wfd = fileno(stdout);
	if (buf == NULL) {
		if (fstat(wfd, &sbuf) == 0) {
			bsize = sbuf.st_blksize > BUFSIZ ?
			    sbuf.st_blksize : BUFSIZ;
			buf = malloc(bsize);
		}
		if (buf == NULL) {
			buf = fb_buf;
			bsize = BUFSIZ;
		}
	}
	while ((nr = read(rfd, buf, bsize)) > 0)
		for (off = 0; nr; nr -= nw, off += nw)
			if ((nw = write(wfd, buf + off, (size_t) nr)) < 0) {
				perror("write");
				exit(1);
			}
	if (nr < 0) {
		fprintf(stderr, "%s: invalid length\n", filename);
		rval = 1;
	}
}
1	/* $NetBSD: cat.c,v 1.43 2004/01/04 03:31:28 jschauma Exp $ */
2
3	/*
4	* Copyright (c) 1989, 1993
5	* The Regents of the University of California. All rights reserved.
6	*
7	* This code is derived from software contributed to Berkeley by
8	* Kevin Fall.
9	*
10	* Redistribution and use in source and binary forms, with or without
11	* modification, are permitted provided that the following conditions
12	* are met:
13	* 1. Redistributions of source code must retain the above copyright
14	* notice, this list of conditions and the following disclaimer.
15	* 2. Redistributions in binary form must reproduce the above copyright
16	* notice, this list of conditions and the following disclaimer in the
17	* documentation and/or other materials provided with the distribution.
18	* 3. Neither the name of the University nor the names of its contributors
19	* may be used to endorse or promote products derived from this software
20	* without specific prior written permission.
21	*
22	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32	* SUCH DAMAGE.
33	*/
34
35	#ifndef __COPYRIGHT
36	#define __COPYRIGHT(arg)
37	#endif
38	#ifndef __RCSID
39	#define __RCSID(arg)
40	#endif
41
42	#if HAVE_NBTOOL_CONFIG_H
43	#include "nbtool_config.h"
44	#endif
45
46	#ifndef __KLIBC__
47	#include <sys/cdefs.h>
48	#endif
49	#if !defined(lint)
50	__COPYRIGHT("@(#) Copyright (c) 1989, 1993\n\
51	The Regents of the University of California. All rights reserved.\n");
52	#if 0
53	static char sccsid[] = "@(#)cat.c 8.2 (Berkeley) 4/27/95";
54	#else
55	__RCSID("$NetBSD: cat.c,v 1.43 2004/01/04 03:31:28 jschauma Exp $");
56	#endif
57	#endif /* not lint */
58
59	#include <sys/param.h>
60	#include <sys/stat.h>
61
62	#include <ctype.h>
63	#ifndef __KLIBC__
64	#include <err.h>
65	#endif
66	#include <errno.h>
67	#include <fcntl.h>
68	#ifndef __KLIBC__
69	#include <locale.h>
70	#endif
71	#include <stdio.h>
72	#include <stdlib.h>
73	#include <string.h>
74	#include <unistd.h>
75
76	int bflag, eflag, fflag, lflag, nflag, sflag, tflag, vflag;
77	int rval;
78	const char *filename;
79
80	int main(int, char *[]);
81	void cook_args(char *argv[]);
82	void cook_buf(FILE *);
83	void raw_args(char *argv[]);
84	void raw_cat(int);
85
86	int main(int argc, char *argv[])
87	{
88	int ch;
89	struct flock stdout_lock;
90
91	#ifndef __KLIBC__
92	setprogname(argv[0]);
93	(void)setlocale(LC_ALL, "");
94	#endif
95
96	while ((ch = getopt(argc, argv, "beflnstuv")) != -1)
97	switch (ch) {
98	case 'b':
99	bflag = nflag = 1; /* -b implies -n */
100	break;
101	case 'e':
102	eflag = vflag = 1; /* -e implies -v */
103	break;
104	case 'f':
105	fflag = 1;
106	break;
107	case 'l':
108	lflag = 1;
109	break;
110	case 'n':
111	nflag = 1;
112	break;
113	case 's':
114	sflag = 1;
115	break;
116	case 't':
117	tflag = vflag = 1; /* -t implies -v */
118	break;
119	case 'u':
120	#ifndef __KLIBC__
121	setbuf(stdout, NULL);
122	#endif
123	break;
124	case 'v':
125	vflag = 1;
126	break;
127	default:
128	case '?':
129	(void)fprintf(stderr,
130	"usage: cat [-beflnstuv] [-] [file ...]\n");
131	exit(1);
132	/* NOTREACHED */
133	}
134	argv += optind;
135
136	if (lflag) {
137	stdout_lock.l_len = 0;
138	stdout_lock.l_start = 0;
139	stdout_lock.l_type = F_WRLCK;
140	stdout_lock.l_whence = SEEK_SET;
141	if (fcntl(STDOUT_FILENO, F_SETLKW, &stdout_lock) == -1) {
142	perror("fcntl");
143	exit(1);
144	}
145	}
146
147	if (bflag \|\| eflag \|\| nflag \|\| sflag \|\| tflag \|\| vflag)
148	cook_args(argv);
149	else
150	raw_args(argv);
151	if (fclose(stdout)) {
152	perror("fclose");
153	exit(1);
154	}
155	exit(rval);
156	/* NOTREACHED */
157	}
158
159	void cook_args(char **argv)
160	{
161	FILE *fp;
162
163	fp = stdin;
164	filename = "stdin";
165	do {
166	if (*argv) {
167	if (!strcmp(*argv, "-"))
168	fp = stdin;
169	else if ((fp = fopen(*argv,
170	fflag ? "rf" : "r")) == NULL) {
171	perror("fopen");
172	rval = 1;
173	++argv;
174	continue;
175	}
176	filename = *argv++;
177	}
178	cook_buf(fp);
179	if (fp != stdin)
180	(void)fclose(fp);
181	} while (*argv);
182	}
183
184	void cook_buf(FILE * fp)
185	{
186	int ch, gobble, line, prev;
187	int stdout_err = 0;
188
189	line = gobble = 0;
190	for (prev = '\n'; (ch = getc(fp)) != EOF; prev = ch) {
191	if (prev == '\n') {
192	if (ch == '\n') {
193	if (sflag) {
194	if (!gobble && putchar(ch) == EOF)
195	break;
196	gobble = 1;
197	continue;
198	}
199	if (nflag) {
200	if (!bflag) {
201	if (fprintf(stdout,
202	"%6d\t",
203	++line) < 0) {
204	stdout_err++;
205	break;
206	}
207	} else if (eflag) {
208	if (fprintf(stdout,
209	"%6s\t", "") < 0) {
210	stdout_err++;
211	break;
212	}
213	}
214	}
215	} else if (nflag) {
216	if (fprintf(stdout, "%6d\t", ++line) < 0) {
217	stdout_err++;
218	break;
219	}
220	}
221	}
222	gobble = 0;
223	if (ch == '\n') {
224	if (eflag)
225	if (putchar('$') == EOF)
226	break;
227	} else if (ch == '\t') {
228	if (tflag) {
229	if (putchar('^') == EOF \|\| putchar('I') == EOF)
230	break;
231	continue;
232	}
233	} else if (vflag) {
234	if (!isascii(ch)) {
235	if (putchar('M') == EOF \|\| putchar('-') == EOF)
236	break;
237	ch = (ch) & 0x7f;
238	}
239	if (iscntrl(ch)) {
240	if (putchar('^') == EOF \|\|
241	putchar(ch == '\177' ? '?' :
242	ch \| 0100) == EOF)
243	break;
244	continue;
245	}
246	}
247	if (putchar(ch) == EOF)
248	break;
249	}
250	if (stdout_err) {
251	perror(filename);
252	rval = 1;
253	}
254	}
255
256	void raw_args(char **argv)
257	{
258	int fd;
259
260	fd = fileno(stdin);
261	filename = "stdin";
262	do {
263	if (*argv) {
264	if (!strcmp(*argv, "-"))
265	fd = fileno(stdin);
266	else if (fflag) {
267	struct stat st;
268	fd = open(*argv, O_RDONLY \| O_NONBLOCK, 0);
269	if (fd < 0)
270	goto skip;
271
272	if (fstat(fd, &st) == -1) {
273	close(fd);
274	goto skip;
275	}
276	if (!S_ISREG(st.st_mode)) {
277	close(fd);
278	errno = EINVAL;
279	goto skipnomsg;
280	}
281	} else if ((fd = open(*argv, O_RDONLY, 0)) < 0) {
282	skip:
283	perror(*argv);
284	skipnomsg:
285	rval = 1;
286	++argv;
287	continue;
288	}
289	filename = *argv++;
290	}
291	raw_cat(fd);
292	if (fd != fileno(stdin))
293	(void)close(fd);
294	} while (*argv);
295	}
296
297	void raw_cat(int rfd)
298	{
299	static char *buf;
300	static char fb_buf[BUFSIZ];
301	static size_t bsize;
302
303	struct stat sbuf;
304	ssize_t nr, nw, off;
305	int wfd;
306
307	wfd = fileno(stdout);
308	if (buf == NULL) {
309	if (fstat(wfd, &sbuf) == 0) {
310	bsize = sbuf.st_blksize > BUFSIZ ?
311	sbuf.st_blksize : BUFSIZ;
312	buf = malloc(bsize);
313	}
314	if (buf == NULL) {
315	buf = fb_buf;
316	bsize = BUFSIZ;
317	}
318	}
319	while ((nr = read(rfd, buf, bsize)) > 0)
320	for (off = 0; nr; nr -= nw, off += nw)
321	if ((nw = write(wfd, buf + off, (size_t) nr)) < 0) {
322	perror("write");
323	exit(1);
324	}
325	if (nr < 0) {
326	fprintf(stderr, "%s: invalid length\n", filename);
327	rval = 1;
328	}
329	}