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 !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>
#include <errno.h>
#include <fcntl.h>
#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;

	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':
			/* unimplemented */
			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 !defined(lint)
43	__COPYRIGHT("@(#) Copyright (c) 1989, 1993\n\
44	The Regents of the University of California. All rights reserved.\n");
45	#if 0
46	static char sccsid[] = "@(#)cat.c 8.2 (Berkeley) 4/27/95";
47	#else
48	__RCSID("$NetBSD: cat.c,v 1.43 2004/01/04 03:31:28 jschauma Exp $");
49	#endif
50	#endif /* not lint */
51
52	#include <sys/param.h>
53	#include <sys/stat.h>
54
55	#include <ctype.h>
56	#include <errno.h>
57	#include <fcntl.h>
58	#include <stdio.h>
59	#include <stdlib.h>
60	#include <string.h>
61	#include <unistd.h>
62
63	int bflag, eflag, fflag, lflag, nflag, sflag, tflag, vflag;
64	int rval;
65	const char *filename;
66
67	int main(int, char *[]);
68	void cook_args(char *argv[]);
69	void cook_buf(FILE *);
70	void raw_args(char *argv[]);
71	void raw_cat(int);
72
73	int main(int argc, char *argv[])
74	{
75	int ch;
76	struct flock stdout_lock;
77
78	while ((ch = getopt(argc, argv, "beflnstuv")) != -1)
79	switch (ch) {
80	case 'b':
81	bflag = nflag = 1; /* -b implies -n */
82	break;
83	case 'e':
84	eflag = vflag = 1; /* -e implies -v */
85	break;
86	case 'f':
87	fflag = 1;
88	break;
89	case 'l':
90	lflag = 1;
91	break;
92	case 'n':
93	nflag = 1;
94	break;
95	case 's':
96	sflag = 1;
97	break;
98	case 't':
99	tflag = vflag = 1; /* -t implies -v */
100	break;
101	case 'u':
102	/* unimplemented */
103	break;
104	case 'v':
105	vflag = 1;
106	break;
107	default:
108	case '?':
109	(void)fprintf(stderr,
110	"usage: cat [-beflnstuv] [-] [file ...]\n");
111	exit(1);
112	/* NOTREACHED */
113	}
114	argv += optind;
115
116	if (lflag) {
117	stdout_lock.l_len = 0;
118	stdout_lock.l_start = 0;
119	stdout_lock.l_type = F_WRLCK;
120	stdout_lock.l_whence = SEEK_SET;
121	if (fcntl(STDOUT_FILENO, F_SETLKW, &stdout_lock) == -1) {
122	perror("fcntl");
123	exit(1);
124	}
125	}
126
127	if (bflag \|\| eflag \|\| nflag \|\| sflag \|\| tflag \|\| vflag)
128	cook_args(argv);
129	else
130	raw_args(argv);
131	if (fclose(stdout)) {
132	perror("fclose");
133	exit(1);
134	}
135	exit(rval);
136	/* NOTREACHED */
137	}
138
139	void cook_args(char **argv)
140	{
141	FILE *fp;
142
143	fp = stdin;
144	filename = "stdin";
145	do {
146	if (*argv) {
147	if (!strcmp(*argv, "-"))
148	fp = stdin;
149	else if ((fp = fopen(*argv,
150	fflag ? "rf" : "r")) == NULL) {
151	perror("fopen");
152	rval = 1;
153	++argv;
154	continue;
155	}
156	filename = *argv++;
157	}
158	cook_buf(fp);
159	if (fp != stdin)
160	(void)fclose(fp);
161	} while (*argv);
162	}
163
164	void cook_buf(FILE * fp)
165	{
166	int ch, gobble, line, prev;
167	int stdout_err = 0;
168
169	line = gobble = 0;
170	for (prev = '\n'; (ch = getc(fp)) != EOF; prev = ch) {
171	if (prev == '\n') {
172	if (ch == '\n') {
173	if (sflag) {
174	if (!gobble && putchar(ch) == EOF)
175	break;
176	gobble = 1;
177	continue;
178	}
179	if (nflag) {
180	if (!bflag) {
181	if (fprintf(stdout,
182	"%6d\t",
183	++line) < 0) {
184	stdout_err++;
185	break;
186	}
187	} else if (eflag) {
188	if (fprintf(stdout,
189	"%6s\t", "") < 0) {
190	stdout_err++;
191	break;
192	}
193	}
194	}
195	} else if (nflag) {
196	if (fprintf(stdout, "%6d\t", ++line) < 0) {
197	stdout_err++;
198	break;
199	}
200	}
201	}
202	gobble = 0;
203	if (ch == '\n') {
204	if (eflag)
205	if (putchar('$') == EOF)
206	break;
207	} else if (ch == '\t') {
208	if (tflag) {
209	if (putchar('^') == EOF \|\| putchar('I') == EOF)
210	break;
211	continue;
212	}
213	} else if (vflag) {
214	if (!isascii(ch)) {
215	if (putchar('M') == EOF \|\| putchar('-') == EOF)
216	break;
217	ch = (ch) & 0x7f;
218	}
219	if (iscntrl(ch)) {
220	if (putchar('^') == EOF \|\|
221	putchar(ch == '\177' ? '?' :
222	ch \| 0100) == EOF)
223	break;
224	continue;
225	}
226	}
227	if (putchar(ch) == EOF)
228	break;
229	}
230	if (stdout_err) {
231	perror(filename);
232	rval = 1;
233	}
234	}
235
236	void raw_args(char **argv)
237	{
238	int fd;
239
240	fd = fileno(stdin);
241	filename = "stdin";
242	do {
243	if (*argv) {
244	if (!strcmp(*argv, "-"))
245	fd = fileno(stdin);
246	else if (fflag) {
247	struct stat st;
248	fd = open(*argv, O_RDONLY \| O_NONBLOCK, 0);
249	if (fd < 0)
250	goto skip;
251
252	if (fstat(fd, &st) == -1) {
253	close(fd);
254	goto skip;
255	}
256	if (!S_ISREG(st.st_mode)) {
257	close(fd);
258	errno = EINVAL;
259	goto skipnomsg;
260	}
261	} else if ((fd = open(*argv, O_RDONLY, 0)) < 0) {
262	skip:
263	perror(*argv);
264	skipnomsg:
265	rval = 1;
266	++argv;
267	continue;
268	}
269	filename = *argv++;
270	}
271	raw_cat(fd);
272	if (fd != fileno(stdin))
273	(void)close(fd);
274	} while (*argv);
275	}
276
277	void raw_cat(int rfd)
278	{
279	static char *buf;
280	static char fb_buf[BUFSIZ];
281	static size_t bsize;
282
283	struct stat sbuf;
284	ssize_t nr, nw, off;
285	int wfd;
286
287	wfd = fileno(stdout);
288	if (buf == NULL) {
289	if (fstat(wfd, &sbuf) == 0) {
290	bsize = sbuf.st_blksize > BUFSIZ ?
291	sbuf.st_blksize : BUFSIZ;
292	buf = malloc(bsize);
293	}
294	if (buf == NULL) {
295	buf = fb_buf;
296	bsize = BUFSIZ;
297	}
298	}
299	while ((nr = read(rfd, buf, bsize)) > 0)
300	for (off = 0; nr; nr -= nw, off += nw)
301	if ((nw = write(wfd, buf + off, (size_t) nr)) < 0) {
302	perror("write");
303	exit(1);
304	}
305	if (nr < 0) {
306	fprintf(stderr, "%s: invalid length\n", filename);
307	rval = 1;
308	}
309	}