2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 static char sccsid[] = "@(#)output.c 8.2 (Berkeley) 5/4/95";
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD$");
42 * Shell output routines. We use our own output routines because:
43 * When a builtin command is interrupted we have to discard
45 * When a builtin command appears in back quotes, we want to
46 * save the output of the command in a region obtained
47 * via malloc, rather than doing a fork and reading the
48 * output of the command via a pipe.
51 #include <stdio.h> /* defines BUFSIZ */
66 #define OUTBUFSIZ BUFSIZ
67 #define BLOCK_OUT -2 /* output to a fixed block of memory */
68 #define MEM_OUT -3 /* output to dynamically allocated memory */
69 #define OUTPUT_ERR 01 /* error occurred on output */
71 static int doformat_wr(void *, const char *, int);
73 struct output output = {NULL, 0, NULL, OUTBUFSIZ, 1, 0};
74 struct output errout = {NULL, 0, NULL, 100, 2, 0};
75 struct output memout = {NULL, 0, NULL, 0, MEM_OUT, 0};
76 struct output *out1 = &output;
77 struct output *out2 = &errout;
89 if (memout.buf != NULL) {
99 out1str(const char *p)
105 out1qstr(const char *p)
111 out2str(const char *p)
117 out2qstr(const char *p)
123 outstr(const char *p, struct output *file)
131 /* Like outstr(), but quote for re-input into the shell. */
133 outqstr(const char *p, struct output *file)
142 /* Caller will handle '=' if necessary */
143 if (p[strcspn(p, "|&;<>()$`\\\"' \t\n*?[~#")] == '\0' ||
144 strcmp(p, "[") == 0) {
150 while ((ch = *p++) != '\0') {
153 /* Can't quote single quotes inside single quotes. */
170 static char out_junk[16];
173 emptyoutbuf(struct output *dest)
177 if (dest->fd == BLOCK_OUT) {
178 dest->nextc = out_junk;
179 dest->nleft = sizeof out_junk;
180 dest->flags |= OUTPUT_ERR;
181 } else if (dest->buf == NULL) {
183 dest->buf = ckmalloc(dest->bufsize);
184 dest->nextc = dest->buf;
185 dest->nleft = dest->bufsize;
187 } else if (dest->fd == MEM_OUT) {
188 offset = dest->bufsize;
191 dest->buf = ckrealloc(dest->buf, dest->bufsize);
192 dest->nleft = dest->bufsize - offset;
193 dest->nextc = dest->buf + offset;
211 flushout(struct output *dest)
214 if (dest->buf == NULL || dest->nextc == dest->buf || dest->fd < 0)
216 if (xwrite(dest->fd, dest->buf, dest->nextc - dest->buf) < 0)
217 dest->flags |= OUTPUT_ERR;
218 dest->nextc = dest->buf;
219 dest->nleft = dest->bufsize;
237 outfmt(struct output *file, const char *fmt, ...)
242 doformat(file, fmt, ap);
248 out1fmt(const char *fmt, ...)
253 doformat(out1, fmt, ap);
258 dprintf(const char *fmt, ...)
263 doformat(out2, fmt, ap);
269 fmtstr(char *outbuf, int length, const char *fmt, ...)
272 struct output strout;
274 strout.nextc = outbuf;
275 strout.nleft = length;
276 strout.fd = BLOCK_OUT;
279 doformat(&strout, fmt, ap);
282 if (strout.flags & OUTPUT_ERR)
283 outbuf[length - 1] = '\0';
287 doformat_wr(void *cookie, const char *buf, int len)
293 o = (struct output *)cookie;
296 c = (unsigned char)*buf++;
304 doformat(struct output *dest, const char *f, va_list ap)
308 if ((fp = fwopen(dest, doformat_wr)) != NULL) {
315 * Version of write which resumes after a signal is caught.
319 xwrite(int fd, const char *buf, int nbytes)
328 i = write(fd, buf, n);
337 } else if (errno != EINTR) {