[apple/file_cmds.git] / rmt / rmt.c

/*	$NetBSD: rmt.c,v 1.9 1997/10/17 13:03:25 lukem Exp $	*/

/*
 * Copyright (c) 1983, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * 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.
 */

#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1983, 1993\n\
	The Regents of the University of California.  All rights reserved.\n");
#endif /* not lint */

#ifndef lint
#if 0
static char sccsid[] = "@(#)rmt.c	8.1 (Berkeley) 6/6/93";
#else
__RCSID("$NetBSD: rmt.c,v 1.9 1997/10/17 13:03:25 lukem Exp $");
#endif
#endif /* not lint */

/*
 * rmt
 */
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/mtio.h>
#include <sys/socket.h>
#include <sys/stat.h>

#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

int	tape = -1;

char	*record;
int	maxrecsize = -1;

#define	SSIZE	64
char	device[SSIZE];
char	count[SSIZE], mode[SSIZE], pos[SSIZE], op[SSIZE];

char	resp[BUFSIZ];

FILE	*debug;
#define	DEBUG(f)	if (debug) fprintf(debug, f)
#define	DEBUG1(f,a)	if (debug) fprintf(debug, f, a)
#define	DEBUG2(f,a1,a2)	if (debug) fprintf(debug, f, a1, a2)

char	*checkbuf __P((char *, int));
void	 error __P((int));
int	 main __P((int, char **));
void	 getstring __P((char *));

int
main(argc, argv)
	int argc;
	char **argv;
{
	int rval;
	char c;
	int n, i, cc;

	argc--, argv++;
	if (argc > 0) {
		debug = fopen(*argv, "w");
		if (debug == 0)
			exit(1);
		(void)setbuf(debug, (char *)0);
	}
top:
	errno = 0;
	rval = 0;
	if (read(STDIN_FILENO, &c, 1) != 1)
		exit(0);
	switch (c) {

	case 'O':
		if (tape >= 0)
			(void) close(tape);
		getstring(device);
		getstring(mode);
		DEBUG2("rmtd: O %s %s\n", device, mode);
		tape = open(device, atoi(mode),
		    S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH);
		if (tape < 0)
			goto ioerror;
		goto respond;

	case 'C':
		DEBUG("rmtd: C\n");
		getstring(device);		/* discard */
		if (close(tape) < 0)
			goto ioerror;
		tape = -1;
		goto respond;

	case 'L':
		getstring(count);
		getstring(pos);
		DEBUG2("rmtd: L %s %s\n", count, pos);
		rval = lseek(tape, (off_t)strtoq(count, NULL, 10), atoi(pos));
		if (rval < 0)
			goto ioerror;
		goto respond;

	case 'W':
		getstring(count);
		n = atoi(count);
		DEBUG1("rmtd: W %s\n", count);
		record = checkbuf(record, n);
		for (i = 0; i < n; i += cc) {
			cc = read(STDIN_FILENO, &record[i], n - i);
			if (cc <= 0) {
				DEBUG("rmtd: premature eof\n");
				exit(2);
			}
		}
		rval = write(tape, record, n);
		if (rval < 0)
			goto ioerror;
		goto respond;

	case 'R':
		getstring(count);
		DEBUG1("rmtd: R %s\n", count);
		n = atoi(count);
		record = checkbuf(record, n);
		rval = read(tape, record, n);
		if (rval < 0)
			goto ioerror;
		(void)sprintf(resp, "A%d\n", rval);
		(void)write(STDOUT_FILENO, resp, strlen(resp));
		(void)write(STDOUT_FILENO, record, rval);
		goto top;

	case 'I':
		getstring(op);
		getstring(count);
		DEBUG2("rmtd: I %s %s\n", op, count);
		{
			struct mtop mtop;

			mtop.mt_op = atoi(op);
			mtop.mt_count = atoi(count);
			if (ioctl(tape, MTIOCTOP, (char *)&mtop) < 0)
				goto ioerror;
			rval = mtop.mt_count;
		}
		goto respond;

	case 'S':		/* status */
		DEBUG("rmtd: S\n");
		{
			struct mtget mtget;

			if (ioctl(tape, MTIOCGET, (char *)&mtget) < 0)
				goto ioerror;
			rval = sizeof (mtget);
			(void)sprintf(resp, "A%d\n", rval);
			(void)write(STDOUT_FILENO, resp, strlen(resp));
			(void)write(STDOUT_FILENO, (char *)&mtget,
			    sizeof (mtget));
			goto top;
		}

	default:
		DEBUG1("rmtd: garbage command %c\n", c);
		exit(3);
	}
respond:
	DEBUG1("rmtd: A %d\n", rval);
	(void)sprintf(resp, "A%d\n", rval);
	(void)write(STDOUT_FILENO, resp, strlen(resp));
	goto top;
ioerror:
	error(errno);
	goto top;
}

void
getstring(bp)
	char *bp;
{
	int i;
	char *cp = bp;

	for (i = 0; i < SSIZE - 1; i++) {
		if (read(STDIN_FILENO, cp+i, 1) != 1)
			exit(0);
		if (cp[i] == '\n')
			break;
	}
	cp[i] = '\0';
}

char *
checkbuf(record, size)
	char *record;
	int size;
{

	if (size <= maxrecsize)
		return (record);
	if (record != 0)
		free(record);
	record = malloc(size);
	if (record == 0) {
		DEBUG("rmtd: cannot allocate buffer space\n");
		exit(4);
	}
	maxrecsize = size;
	while (size > 1024 &&
	    setsockopt(0, SOL_SOCKET, SO_RCVBUF, &size, sizeof (size)) < 0)
		size -= 1024;
	return (record);
}

void
error(num)
	int num;
{

	DEBUG2("rmtd: E %d (%s)\n", num, strerror(num));
	(void)sprintf(resp, "E%d\n%s\n", num, strerror(num));
	(void)write(STDOUT_FILENO, resp, strlen(resp));
}
Commit	Line	Data
44a7a5ab A	1	/* $NetBSD: rmt.c,v 1.9 1997/10/17 13:03:25 lukem Exp $ */
	2
	3	/*
	4	* Copyright (c) 1983, 1993
	5	* The Regents of the University of California. All rights reserved.
	6	*
	7	* Redistribution and use in source and binary forms, with or without
	8	* modification, are permitted provided that the following conditions
	9	* are met:
	10	* 1. Redistributions of source code must retain the above copyright
	11	* notice, this list of conditions and the following disclaimer.
	12	* 2. Redistributions in binary form must reproduce the above copyright
	13	* notice, this list of conditions and the following disclaimer in the
	14	* documentation and/or other materials provided with the distribution.
	15	* 3. All advertising materials mentioning features or use of this software
	16	* must display the following acknowledgement:
	17	* This product includes software developed by the University of
	18	* California, Berkeley and its contributors.
	19	* 4. Neither the name of the University nor the names of its contributors
	20	* may be used to endorse or promote products derived from this software
	21	* without specific prior written permission.
	22	*
	23	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	24	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	25	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	26	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	27	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	28	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	29	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	30	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	31	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	32	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	33	* SUCH DAMAGE.
	34	*/
	35
	36	#include <sys/cdefs.h>
	37	#ifndef lint
	38	__COPYRIGHT("@(#) Copyright (c) 1983, 1993\n\
	39	The Regents of the University of California. All rights reserved.\n");
	40	#endif /* not lint */
	41
	42	#ifndef lint
	43	#if 0
	44	static char sccsid[] = "@(#)rmt.c 8.1 (Berkeley) 6/6/93";
	45	#else
	46	__RCSID("$NetBSD: rmt.c,v 1.9 1997/10/17 13:03:25 lukem Exp $");
	47	#endif
	48	#endif /* not lint */
	49
	50	/*
	51	* rmt
	52	*/
	53	#include <sys/types.h>
	54	#include <sys/ioctl.h>
	55	#include <sys/mtio.h>
	56	#include <sys/socket.h>
	57	#include <sys/stat.h>
	58
	59	#include <errno.h>
	60	#include <fcntl.h>
	61	#include <stdio.h>
	62	#include <stdlib.h>
	63	#include <string.h>
	64	#include <unistd.h>
65
66	int tape = -1;
67
68	char *record;
69	int maxrecsize = -1;
70
71	#define SSIZE 64
72	char device[SSIZE];
73	char count[SSIZE], mode[SSIZE], pos[SSIZE], op[SSIZE];
74
75	char resp[BUFSIZ];
76
77	FILE *debug;
78	#define DEBUG(f) if (debug) fprintf(debug, f)
79	#define DEBUG1(f,a) if (debug) fprintf(debug, f, a)
80	#define DEBUG2(f,a1,a2) if (debug) fprintf(debug, f, a1, a2)
81
82	char checkbuf __P((char , int));
83	void error __P((int));
84	int main __P((int, char **));
85	void getstring __P((char *));
86
87	int
88	main(argc, argv)
89	int argc;
90	char **argv;
91	{
92	int rval;
93	char c;
94	int n, i, cc;
95
96	argc--, argv++;
97	if (argc > 0) {
98	debug = fopen(*argv, "w");
99	if (debug == 0)
100	exit(1);
101	(void)setbuf(debug, (char *)0);
102	}
103	top:
104	errno = 0;
105	rval = 0;
106	if (read(STDIN_FILENO, &c, 1) != 1)
107	exit(0);
108	switch (c) {
109
110	case 'O':
111	if (tape >= 0)
112	(void) close(tape);
113	getstring(device);
114	getstring(mode);
115	DEBUG2("rmtd: O %s %s\n", device, mode);
116	tape = open(device, atoi(mode),
117	S_IRUSR\|S_IWUSR\|S_IRGRP\|S_IWGRP\|S_IROTH\|S_IWOTH);
118	if (tape < 0)
119	goto ioerror;
120	goto respond;
121
122	case 'C':
123	DEBUG("rmtd: C\n");
124	getstring(device); /* discard */
125	if (close(tape) < 0)
126	goto ioerror;
127	tape = -1;
128	goto respond;
129
130	case 'L':
131	getstring(count);
132	getstring(pos);
133	DEBUG2("rmtd: L %s %s\n", count, pos);
134	rval = lseek(tape, (off_t)strtoq(count, NULL, 10), atoi(pos));
135	if (rval < 0)
136	goto ioerror;
137	goto respond;
138
139	case 'W':
140	getstring(count);
141	n = atoi(count);
142	DEBUG1("rmtd: W %s\n", count);
143	record = checkbuf(record, n);
144	for (i = 0; i < n; i += cc) {
145	cc = read(STDIN_FILENO, &record[i], n - i);
146	if (cc <= 0) {
147	DEBUG("rmtd: premature eof\n");
148	exit(2);
149	}
150	}
151	rval = write(tape, record, n);
152	if (rval < 0)
153	goto ioerror;
154	goto respond;
155
156	case 'R':
157	getstring(count);
158	DEBUG1("rmtd: R %s\n", count);
159	n = atoi(count);
160	record = checkbuf(record, n);
161	rval = read(tape, record, n);
162	if (rval < 0)
163	goto ioerror;
164	(void)sprintf(resp, "A%d\n", rval);
165	(void)write(STDOUT_FILENO, resp, strlen(resp));
166	(void)write(STDOUT_FILENO, record, rval);
167	goto top;
168
169	case 'I':
170	getstring(op);
171	getstring(count);
172	DEBUG2("rmtd: I %s %s\n", op, count);
173	{
174	struct mtop mtop;
175
176	mtop.mt_op = atoi(op);
177	mtop.mt_count = atoi(count);
178	if (ioctl(tape, MTIOCTOP, (char *)&mtop) < 0)
179	goto ioerror;
180	rval = mtop.mt_count;
181	}
182	goto respond;
183
184	case 'S': /* status */
185	DEBUG("rmtd: S\n");
186	{
187	struct mtget mtget;
188
189	if (ioctl(tape, MTIOCGET, (char *)&mtget) < 0)
190	goto ioerror;
191	rval = sizeof (mtget);
192	(void)sprintf(resp, "A%d\n", rval);
193	(void)write(STDOUT_FILENO, resp, strlen(resp));
194	(void)write(STDOUT_FILENO, (char *)&mtget,
195	sizeof (mtget));
196	goto top;
197	}
198
199	default:
200	DEBUG1("rmtd: garbage command %c\n", c);
201	exit(3);
202	}
203	respond:
204	DEBUG1("rmtd: A %d\n", rval);
205	(void)sprintf(resp, "A%d\n", rval);
206	(void)write(STDOUT_FILENO, resp, strlen(resp));
207	goto top;
208	ioerror:
209	error(errno);
210	goto top;
211	}
212
213	void
214	getstring(bp)
215	char *bp;
216	{
217	int i;
218	char *cp = bp;
219
220	for (i = 0; i < SSIZE - 1; i++) {
221	if (read(STDIN_FILENO, cp+i, 1) != 1)
222	exit(0);
223	if (cp[i] == '\n')
224	break;
225	}
226	cp[i] = '\0';
227	}
228
229	char *
230	checkbuf(record, size)
231	char *record;
232	int size;
233	{
234
235	if (size <= maxrecsize)
236	return (record);
237	if (record != 0)
238	free(record);
239	record = malloc(size);
240	if (record == 0) {
241	DEBUG("rmtd: cannot allocate buffer space\n");
242	exit(4);
243	}
244	maxrecsize = size;
245	while (size > 1024 &&
246	setsockopt(0, SOL_SOCKET, SO_RCVBUF, &size, sizeof (size)) < 0)
247	size -= 1024;
248	return (record);
249	}
250
251	void
252	error(num)
253	int num;
254	{
255
256	DEBUG2("rmtd: E %d (%s)\n", num, strerror(num));
257	(void)sprintf(resp, "E%d\n%s\n", num, strerror(num));
258	(void)write(STDOUT_FILENO, resp, strlen(resp));
259	}