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![Pedro F. Giffuni](/assets/img/avatar_default.png)
Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
371 lines
7.2 KiB
C
371 lines
7.2 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Kenneth Almquist.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)output.c 8.2 (Berkeley) 5/4/95";
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#endif
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#endif /* not lint */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* Shell output routines. We use our own output routines because:
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* When a builtin command is interrupted we have to discard
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* any pending output.
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* When a builtin command appears in back quotes, we want to
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* save the output of the command in a region obtained
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* via malloc, rather than doing a fork and reading the
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* output of the command via a pipe.
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*/
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#include <stdio.h> /* defines BUFSIZ */
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#include <string.h>
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#include <stdarg.h>
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#include <errno.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <wchar.h>
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#include <wctype.h>
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#include "shell.h"
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#include "syntax.h"
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#include "output.h"
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#include "memalloc.h"
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#include "error.h"
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#include "var.h"
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#define OUTBUFSIZ BUFSIZ
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#define MEM_OUT -2 /* output to dynamically allocated memory */
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#define OUTPUT_ERR 01 /* error occurred on output */
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static int doformat_wr(void *, const char *, int);
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struct output output = {NULL, NULL, NULL, OUTBUFSIZ, 1, 0};
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struct output errout = {NULL, NULL, NULL, 256, 2, 0};
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struct output memout = {NULL, NULL, NULL, 64, MEM_OUT, 0};
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struct output *out1 = &output;
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struct output *out2 = &errout;
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void
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outcslow(int c, struct output *file)
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{
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outc(c, file);
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}
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void
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out1str(const char *p)
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{
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outstr(p, out1);
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}
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void
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out1qstr(const char *p)
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{
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outqstr(p, out1);
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}
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void
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out2str(const char *p)
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{
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outstr(p, out2);
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}
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void
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out2qstr(const char *p)
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{
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outqstr(p, out2);
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}
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void
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outstr(const char *p, struct output *file)
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{
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outbin(p, strlen(p), file);
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}
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static void
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byteseq(int ch, struct output *file)
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{
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char seq[4];
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seq[0] = '\\';
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seq[1] = (ch >> 6 & 0x3) + '0';
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seq[2] = (ch >> 3 & 0x7) + '0';
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seq[3] = (ch & 0x7) + '0';
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outbin(seq, 4, file);
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}
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static void
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outdqstr(const char *p, struct output *file)
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{
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const char *end;
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mbstate_t mbs;
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size_t clen;
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wchar_t wc;
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memset(&mbs, '\0', sizeof(mbs));
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end = p + strlen(p);
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outstr("$'", file);
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while ((clen = mbrtowc(&wc, p, end - p + 1, &mbs)) != 0) {
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if (clen == (size_t)-2) {
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while (p < end)
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byteseq(*p++, file);
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break;
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}
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if (clen == (size_t)-1) {
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memset(&mbs, '\0', sizeof(mbs));
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byteseq(*p++, file);
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continue;
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}
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if (wc == L'\n')
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outcslow('\n', file), p++;
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else if (wc == L'\r')
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outstr("\\r", file), p++;
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else if (wc == L'\t')
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outstr("\\t", file), p++;
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else if (!iswprint(wc)) {
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for (; clen > 0; clen--)
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byteseq(*p++, file);
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} else {
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if (wc == L'\'' || wc == L'\\')
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outcslow('\\', file);
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outbin(p, clen, file);
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p += clen;
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}
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}
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outcslow('\'', file);
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}
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/* Like outstr(), but quote for re-input into the shell. */
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void
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outqstr(const char *p, struct output *file)
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{
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int i;
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if (p[0] == '\0') {
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outstr("''", file);
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return;
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}
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for (i = 0; p[i] != '\0'; i++) {
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if ((p[i] > '\0' && p[i] < ' ' && p[i] != '\n') ||
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(p[i] & 0x80) != 0 || p[i] == '\'') {
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outdqstr(p, file);
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return;
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}
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}
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if (p[strcspn(p, "|&;<>()$`\\\" \n*?[~#=")] == '\0' ||
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strcmp(p, "[") == 0) {
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outstr(p, file);
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return;
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}
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outcslow('\'', file);
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outstr(p, file);
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outcslow('\'', file);
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}
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void
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outbin(const void *data, size_t len, struct output *file)
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{
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const char *p;
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p = data;
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while (len-- > 0)
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outc(*p++, file);
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}
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void
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emptyoutbuf(struct output *dest)
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{
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int offset, newsize;
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if (dest->buf == NULL) {
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INTOFF;
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dest->buf = ckmalloc(dest->bufsize);
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dest->nextc = dest->buf;
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dest->bufend = dest->buf + dest->bufsize;
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INTON;
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} else if (dest->fd == MEM_OUT) {
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offset = dest->nextc - dest->buf;
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newsize = dest->bufsize << 1;
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INTOFF;
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dest->buf = ckrealloc(dest->buf, newsize);
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dest->bufsize = newsize;
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dest->bufend = dest->buf + newsize;
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dest->nextc = dest->buf + offset;
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INTON;
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} else {
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flushout(dest);
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}
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}
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void
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flushall(void)
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{
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flushout(&output);
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flushout(&errout);
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}
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void
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flushout(struct output *dest)
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{
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if (dest->buf == NULL || dest->nextc == dest->buf || dest->fd < 0)
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return;
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if (xwrite(dest->fd, dest->buf, dest->nextc - dest->buf) < 0)
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dest->flags |= OUTPUT_ERR;
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dest->nextc = dest->buf;
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}
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void
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freestdout(void)
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{
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output.nextc = output.buf;
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}
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int
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outiserror(struct output *file)
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{
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return (file->flags & OUTPUT_ERR);
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}
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void
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outclearerror(struct output *file)
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{
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file->flags &= ~OUTPUT_ERR;
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}
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void
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outfmt(struct output *file, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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doformat(file, fmt, ap);
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va_end(ap);
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}
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void
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out1fmt(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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doformat(out1, fmt, ap);
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va_end(ap);
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}
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void
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out2fmt_flush(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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doformat(out2, fmt, ap);
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va_end(ap);
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flushout(out2);
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}
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void
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fmtstr(char *outbuf, int length, const char *fmt, ...)
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{
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va_list ap;
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INTOFF;
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va_start(ap, fmt);
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vsnprintf(outbuf, length, fmt, ap);
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va_end(ap);
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INTON;
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}
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static int
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doformat_wr(void *cookie, const char *buf, int len)
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{
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struct output *o;
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o = (struct output *)cookie;
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outbin(buf, len, o);
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return (len);
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}
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void
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doformat(struct output *dest, const char *f, va_list ap)
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{
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FILE *fp;
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if ((fp = fwopen(dest, doformat_wr)) != NULL) {
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vfprintf(fp, f, ap);
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fclose(fp);
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}
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}
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/*
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* Version of write which resumes after a signal is caught.
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*/
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int
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xwrite(int fd, const char *buf, int nbytes)
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{
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int ntry;
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int i;
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int n;
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n = nbytes;
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ntry = 0;
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for (;;) {
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i = write(fd, buf, n);
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if (i > 0) {
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if ((n -= i) <= 0)
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return nbytes;
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buf += i;
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ntry = 0;
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} else if (i == 0) {
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if (++ntry > 10)
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return nbytes - n;
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} else if (errno != EINTR) {
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return -1;
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}
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}
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}
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