1994-05-26 06:18:55 +00:00
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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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* 4. 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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1998-05-18 06:44:24 +00:00
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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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1994-05-26 06:18:55 +00:00
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#endif /* not lint */
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2002-06-30 05:15:05 +00:00
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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1994-05-26 06:18:55 +00:00
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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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1996-09-01 10:22:36 +00:00
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#include <string.h>
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#include <stdarg.h>
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1994-05-26 06:18:55 +00:00
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#include <errno.h>
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1996-09-01 10:22:36 +00:00
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#include <unistd.h>
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#include <stdlib.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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2002-06-06 03:29:23 +00:00
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#include "var.h"
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1994-05-26 06:18:55 +00:00
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#define OUTBUFSIZ BUFSIZ
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#define BLOCK_OUT -2 /* output to a fixed block of memory */
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#define MEM_OUT -3 /* output to dynamically allocated memory */
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#define OUTPUT_ERR 01 /* error occurred on output */
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2010-10-13 22:18:03 +00:00
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static int doformat_wr(void *, const char *, int);
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1994-05-26 06:18:55 +00:00
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struct output output = {NULL, 0, NULL, OUTBUFSIZ, 1, 0};
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2009-11-21 14:28:32 +00:00
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struct output errout = {NULL, 0, NULL, 256, 2, 0};
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1994-05-26 06:18:55 +00:00
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struct output memout = {NULL, 0, NULL, 0, MEM_OUT, 0};
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struct output *out1 = &output;
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struct output *out2 = &errout;
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#ifdef mkinit
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INCLUDE "output.h"
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INCLUDE "memalloc.h"
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RESET {
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out1 = &output;
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out2 = &errout;
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if (memout.buf != NULL) {
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ckfree(memout.buf);
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memout.buf = NULL;
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}
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}
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#endif
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void
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2002-02-02 06:50:57 +00:00
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out1str(const char *p)
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{
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1994-05-26 06:18:55 +00:00
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outstr(p, out1);
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}
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2002-06-04 12:59:12 +00:00
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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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1994-05-26 06:18:55 +00:00
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void
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2002-02-02 06:50:57 +00:00
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out2str(const char *p)
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{
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1994-05-26 06:18:55 +00:00
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outstr(p, out2);
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}
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2002-06-04 12:59:12 +00:00
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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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1994-05-26 06:18:55 +00:00
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void
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2002-02-02 06:50:57 +00:00
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outstr(const char *p, struct output *file)
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{
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2010-11-14 15:31:59 +00:00
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outbin(p, strlen(p), file);
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1994-05-26 06:18:55 +00:00
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}
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2002-06-04 12:59:12 +00:00
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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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char ch;
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2009-06-19 22:09:55 +00:00
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int inquotes;
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2002-06-04 12:59:12 +00:00
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2005-12-08 21:00:39 +00:00
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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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2009-06-19 22:09:55 +00:00
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/* Caller will handle '=' if necessary */
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if (p[strcspn(p, "|&;<>()$`\\\"' \t\n*?[~#")] == '\0' ||
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strcmp(p, "[") == 0) {
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2002-06-06 03:29:23 +00:00
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outstr(p, file);
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return;
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}
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2009-06-19 22:09:55 +00:00
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inquotes = 0;
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2002-06-04 12:59:12 +00:00
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while ((ch = *p++) != '\0') {
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switch (ch) {
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case '\'':
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2009-06-19 22:09:55 +00:00
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/* Can't quote single quotes inside single quotes. */
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if (inquotes)
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outc('\'', file);
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inquotes = 0;
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outstr("\\'", file);
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2002-06-04 12:59:12 +00:00
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break;
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default:
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2009-06-19 22:09:55 +00:00
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if (!inquotes)
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outc('\'', file);
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inquotes = 1;
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2002-06-04 12:59:12 +00:00
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outc(ch, file);
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}
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}
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2009-06-19 22:09:55 +00:00
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if (inquotes)
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outc('\'', file);
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2002-06-04 12:59:12 +00:00
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}
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1994-05-26 06:18:55 +00:00
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2010-11-14 15:31:59 +00:00
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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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2010-10-13 04:01:01 +00:00
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static char out_junk[16];
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1994-05-26 06:18:55 +00:00
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void
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2002-02-02 06:50:57 +00:00
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emptyoutbuf(struct output *dest)
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{
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1994-05-26 06:18:55 +00:00
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int offset;
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if (dest->fd == BLOCK_OUT) {
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dest->nextc = out_junk;
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dest->nleft = sizeof out_junk;
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dest->flags |= OUTPUT_ERR;
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} else 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->nleft = dest->bufsize;
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INTON;
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} else if (dest->fd == MEM_OUT) {
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offset = dest->bufsize;
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INTOFF;
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dest->bufsize <<= 1;
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dest->buf = ckrealloc(dest->buf, dest->bufsize);
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dest->nleft = dest->bufsize - offset;
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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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dest->nleft--;
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}
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void
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2002-02-02 06:50:57 +00:00
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flushall(void)
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{
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1994-05-26 06:18:55 +00:00
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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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2002-02-02 06:50:57 +00:00
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flushout(struct output *dest)
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{
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1994-05-26 06:18:55 +00:00
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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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dest->nleft = dest->bufsize;
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}
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void
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2002-02-02 06:50:57 +00:00
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freestdout(void)
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{
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1994-05-26 06:18:55 +00:00
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INTOFF;
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if (output.buf) {
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ckfree(output.buf);
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output.buf = NULL;
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output.nleft = 0;
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}
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INTON;
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}
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void
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2002-02-02 06:50:57 +00:00
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outfmt(struct output *file, const char *fmt, ...)
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{
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1994-05-26 06:18:55 +00:00
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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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2002-02-02 06:50:57 +00:00
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out1fmt(const char *fmt, ...)
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{
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1994-05-26 06:18:55 +00:00
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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
|
2009-11-21 14:28:32 +00:00
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out2fmt_flush(const char *fmt, ...)
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2002-02-02 06:50:57 +00:00
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{
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1994-05-26 06:18:55 +00:00
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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
|
2002-02-02 06:50:57 +00:00
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fmtstr(char *outbuf, int length, const char *fmt, ...)
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{
|
1994-05-26 06:18:55 +00:00
|
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va_list ap;
|
2002-10-01 13:41:13 +00:00
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struct output strout;
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1994-05-26 06:18:55 +00:00
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2002-10-01 13:41:13 +00:00
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strout.nextc = outbuf;
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strout.nleft = length;
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strout.fd = BLOCK_OUT;
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strout.flags = 0;
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1994-05-26 06:18:55 +00:00
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va_start(ap, fmt);
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2002-10-01 13:41:13 +00:00
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doformat(&strout, fmt, ap);
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2002-10-01 13:22:12 +00:00
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va_end(ap);
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2002-10-01 13:41:13 +00:00
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outc('\0', &strout);
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if (strout.flags & OUTPUT_ERR)
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outbuf[length - 1] = '\0';
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1994-05-26 06:18:55 +00:00
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}
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|
|
2010-10-13 22:18:03 +00:00
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|
|
static int
|
2002-10-01 13:22:12 +00:00
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|
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doformat_wr(void *cookie, const char *buf, int len)
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|
|
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{
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struct output *o;
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o = (struct output *)cookie;
|
2010-11-14 15:31:59 +00:00
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outbin(buf, len, o);
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1994-05-26 06:18:55 +00:00
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|
2010-11-14 15:31:59 +00:00
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return (len);
|
2002-10-01 13:22:12 +00:00
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}
|
1994-05-26 06:18:55 +00:00
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void
|
2002-02-02 06:50:57 +00:00
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doformat(struct output *dest, const char *f, va_list ap)
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{
|
2002-10-01 13:22:12 +00:00
|
|
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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);
|
1994-05-26 06:18:55 +00:00
|
|
|
}
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|
}
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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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|
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|
int
|
2009-12-24 18:41:14 +00:00
|
|
|
xwrite(int fd, const char *buf, int nbytes)
|
2002-02-02 06:50:57 +00:00
|
|
|
{
|
1994-05-26 06:18:55 +00:00
|
|
|
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) {
|
|
|
|
if (++ntry > 10)
|
|
|
|
return nbytes - n;
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|
|
|
} else if (errno != EINTR) {
|
|
|
|
return -1;
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|
|
|
}
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|
|
|
}
|
|
|
|
}
|