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 * 3. 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
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 */
68 #define OUTBUFSIZ BUFSIZ
69 #define MEM_OUT -2 /* output to dynamically allocated memory */
70 #define OUTPUT_ERR 01 /* error occurred on output */
72 static int doformat_wr(void *, const char *, int);
74 struct output output = {NULL, 0, NULL, OUTBUFSIZ, 1, 0};
75 struct output errout = {NULL, 0, NULL, 256, 2, 0};
76 struct output memout = {NULL, 0, NULL, 0, MEM_OUT, 0};
77 struct output *out1 = &output;
78 struct output *out2 = &errout;
81 outcslow(int c, struct output *file)
87 out1str(const char *p)
93 out1qstr(const char *p)
99 out2str(const char *p)
105 out2qstr(const char *p)
111 outstr(const char *p, struct output *file)
113 outbin(p, strlen(p), file);
117 byteseq(int ch, struct output *file)
122 seq[1] = (ch >> 6 & 0x3) + '0';
123 seq[2] = (ch >> 3 & 0x7) + '0';
124 seq[3] = (ch & 0x7) + '0';
125 outbin(seq, 4, file);
129 outdqstr(const char *p, struct output *file)
136 memset(&mbs, '\0', sizeof(mbs));
139 while ((clen = mbrtowc(&wc, p, end - p + 1, &mbs)) != 0) {
140 if (clen == (size_t)-2) {
145 if (clen == (size_t)-1) {
146 memset(&mbs, '\0', sizeof(mbs));
151 outcslow('\n', file), p++;
152 else if (wc == L'\r')
153 outstr("\\r", file), p++;
154 else if (wc == L'\t')
155 outstr("\\t", file), p++;
156 else if (!iswprint(wc)) {
157 for (; clen > 0; clen--)
160 if (wc == L'\'' || wc == L'\\')
161 outcslow('\\', file);
162 outbin(p, clen, file);
166 outcslow('\'', file);
169 /* Like outstr(), but quote for re-input into the shell. */
171 outqstr(const char *p, struct output *file)
179 for (i = 0; p[i] != '\0'; i++) {
180 if ((p[i] > '\0' && p[i] < ' ' && p[i] != '\n') ||
181 (p[i] & 0x80) != 0 || p[i] == '\'') {
187 if (p[strcspn(p, "|&;<>()$`\\\" \n*?[~#=")] == '\0' ||
188 strcmp(p, "[") == 0) {
193 outcslow('\'', file);
195 outcslow('\'', file);
199 outbin(const void *data, size_t len, struct output *file)
209 emptyoutbuf(struct output *dest)
213 if (dest->buf == NULL) {
215 dest->buf = ckmalloc(dest->bufsize);
216 dest->nextc = dest->buf;
217 dest->nleft = dest->bufsize;
219 } else if (dest->fd == MEM_OUT) {
220 offset = dest->bufsize;
223 dest->buf = ckrealloc(dest->buf, dest->bufsize);
224 dest->nleft = dest->bufsize - offset;
225 dest->nextc = dest->buf + offset;
243 flushout(struct output *dest)
246 if (dest->buf == NULL || dest->nextc == dest->buf || dest->fd < 0)
248 if (xwrite(dest->fd, dest->buf, dest->nextc - dest->buf) < 0)
249 dest->flags |= OUTPUT_ERR;
250 dest->nextc = dest->buf;
251 dest->nleft = dest->bufsize;
269 outiserror(struct output *file)
271 return (file->flags & OUTPUT_ERR);
276 outclearerror(struct output *file)
278 file->flags &= ~OUTPUT_ERR;
283 outfmt(struct output *file, const char *fmt, ...)
288 doformat(file, fmt, ap);
294 out1fmt(const char *fmt, ...)
299 doformat(out1, fmt, ap);
304 out2fmt_flush(const char *fmt, ...)
309 doformat(out2, fmt, ap);
315 fmtstr(char *outbuf, int length, const char *fmt, ...)
321 vsnprintf(outbuf, length, fmt, ap);
327 doformat_wr(void *cookie, const char *buf, int len)
331 o = (struct output *)cookie;
338 doformat(struct output *dest, const char *f, va_list ap)
342 if ((fp = fwopen(dest, doformat_wr)) != NULL) {
349 * Version of write which resumes after a signal is caught.
353 xwrite(int fd, const char *buf, int nbytes)
362 i = write(fd, buf, n);
371 } else if (errno != EINTR) {