2cac6e364a
Most of this is adding const keywords, but setvar() in var.c had to be changed somewhat more.
340 lines
6.6 KiB
C
340 lines
6.6 KiB
C
/*-
|
|
* Copyright (c) 1991, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Kenneth Almquist.
|
|
*
|
|
* 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.
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef lint
|
|
#if 0
|
|
static char sccsid[] = "@(#)output.c 8.2 (Berkeley) 5/4/95";
|
|
#endif
|
|
#endif /* not lint */
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
/*
|
|
* Shell output routines. We use our own output routines because:
|
|
* When a builtin command is interrupted we have to discard
|
|
* any pending output.
|
|
* When a builtin command appears in back quotes, we want to
|
|
* save the output of the command in a region obtained
|
|
* via malloc, rather than doing a fork and reading the
|
|
* output of the command via a pipe.
|
|
*/
|
|
|
|
#include <stdio.h> /* defines BUFSIZ */
|
|
#include <string.h>
|
|
#include <stdarg.h>
|
|
#include <errno.h>
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
|
|
#include "shell.h"
|
|
#include "syntax.h"
|
|
#include "output.h"
|
|
#include "memalloc.h"
|
|
#include "error.h"
|
|
#include "var.h"
|
|
|
|
|
|
#define OUTBUFSIZ BUFSIZ
|
|
#define BLOCK_OUT -2 /* output to a fixed block of memory */
|
|
#define MEM_OUT -3 /* output to dynamically allocated memory */
|
|
#define OUTPUT_ERR 01 /* error occurred on output */
|
|
|
|
static int doformat_wr(void *, const char *, int);
|
|
|
|
struct output output = {NULL, 0, NULL, OUTBUFSIZ, 1, 0};
|
|
struct output errout = {NULL, 0, NULL, 256, 2, 0};
|
|
struct output memout = {NULL, 0, NULL, 0, MEM_OUT, 0};
|
|
struct output *out1 = &output;
|
|
struct output *out2 = &errout;
|
|
|
|
|
|
|
|
#ifdef mkinit
|
|
|
|
INCLUDE "output.h"
|
|
INCLUDE "memalloc.h"
|
|
|
|
RESET {
|
|
out1 = &output;
|
|
out2 = &errout;
|
|
if (memout.buf != NULL) {
|
|
ckfree(memout.buf);
|
|
memout.buf = NULL;
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
void
|
|
out1str(const char *p)
|
|
{
|
|
outstr(p, out1);
|
|
}
|
|
|
|
void
|
|
out1qstr(const char *p)
|
|
{
|
|
outqstr(p, out1);
|
|
}
|
|
|
|
void
|
|
out2str(const char *p)
|
|
{
|
|
outstr(p, out2);
|
|
}
|
|
|
|
void
|
|
out2qstr(const char *p)
|
|
{
|
|
outqstr(p, out2);
|
|
}
|
|
|
|
void
|
|
outstr(const char *p, struct output *file)
|
|
{
|
|
while (*p)
|
|
outc(*p++, file);
|
|
}
|
|
|
|
/* Like outstr(), but quote for re-input into the shell. */
|
|
void
|
|
outqstr(const char *p, struct output *file)
|
|
{
|
|
char ch;
|
|
int inquotes;
|
|
|
|
if (p[0] == '\0') {
|
|
outstr("''", file);
|
|
return;
|
|
}
|
|
/* Caller will handle '=' if necessary */
|
|
if (p[strcspn(p, "|&;<>()$`\\\"' \t\n*?[~#")] == '\0' ||
|
|
strcmp(p, "[") == 0) {
|
|
outstr(p, file);
|
|
return;
|
|
}
|
|
|
|
inquotes = 0;
|
|
while ((ch = *p++) != '\0') {
|
|
switch (ch) {
|
|
case '\'':
|
|
/* Can't quote single quotes inside single quotes. */
|
|
if (inquotes)
|
|
outc('\'', file);
|
|
inquotes = 0;
|
|
outstr("\\'", file);
|
|
break;
|
|
default:
|
|
if (!inquotes)
|
|
outc('\'', file);
|
|
inquotes = 1;
|
|
outc(ch, file);
|
|
}
|
|
}
|
|
if (inquotes)
|
|
outc('\'', file);
|
|
}
|
|
|
|
STATIC char out_junk[16];
|
|
|
|
void
|
|
emptyoutbuf(struct output *dest)
|
|
{
|
|
int offset;
|
|
|
|
if (dest->fd == BLOCK_OUT) {
|
|
dest->nextc = out_junk;
|
|
dest->nleft = sizeof out_junk;
|
|
dest->flags |= OUTPUT_ERR;
|
|
} else if (dest->buf == NULL) {
|
|
INTOFF;
|
|
dest->buf = ckmalloc(dest->bufsize);
|
|
dest->nextc = dest->buf;
|
|
dest->nleft = dest->bufsize;
|
|
INTON;
|
|
} else if (dest->fd == MEM_OUT) {
|
|
offset = dest->bufsize;
|
|
INTOFF;
|
|
dest->bufsize <<= 1;
|
|
dest->buf = ckrealloc(dest->buf, dest->bufsize);
|
|
dest->nleft = dest->bufsize - offset;
|
|
dest->nextc = dest->buf + offset;
|
|
INTON;
|
|
} else {
|
|
flushout(dest);
|
|
}
|
|
dest->nleft--;
|
|
}
|
|
|
|
|
|
void
|
|
flushall(void)
|
|
{
|
|
flushout(&output);
|
|
flushout(&errout);
|
|
}
|
|
|
|
|
|
void
|
|
flushout(struct output *dest)
|
|
{
|
|
|
|
if (dest->buf == NULL || dest->nextc == dest->buf || dest->fd < 0)
|
|
return;
|
|
if (xwrite(dest->fd, dest->buf, dest->nextc - dest->buf) < 0)
|
|
dest->flags |= OUTPUT_ERR;
|
|
dest->nextc = dest->buf;
|
|
dest->nleft = dest->bufsize;
|
|
}
|
|
|
|
|
|
void
|
|
freestdout(void)
|
|
{
|
|
INTOFF;
|
|
if (output.buf) {
|
|
ckfree(output.buf);
|
|
output.buf = NULL;
|
|
output.nleft = 0;
|
|
}
|
|
INTON;
|
|
}
|
|
|
|
|
|
void
|
|
outfmt(struct output *file, const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
doformat(file, fmt, ap);
|
|
va_end(ap);
|
|
}
|
|
|
|
|
|
void
|
|
out1fmt(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
doformat(out1, fmt, ap);
|
|
va_end(ap);
|
|
}
|
|
|
|
void
|
|
out2fmt_flush(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
doformat(out2, fmt, ap);
|
|
va_end(ap);
|
|
flushout(out2);
|
|
}
|
|
|
|
void
|
|
fmtstr(char *outbuf, int length, const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
struct output strout;
|
|
|
|
strout.nextc = outbuf;
|
|
strout.nleft = length;
|
|
strout.fd = BLOCK_OUT;
|
|
strout.flags = 0;
|
|
va_start(ap, fmt);
|
|
doformat(&strout, fmt, ap);
|
|
va_end(ap);
|
|
outc('\0', &strout);
|
|
if (strout.flags & OUTPUT_ERR)
|
|
outbuf[length - 1] = '\0';
|
|
}
|
|
|
|
static int
|
|
doformat_wr(void *cookie, const char *buf, int len)
|
|
{
|
|
struct output *o;
|
|
int origlen;
|
|
unsigned char c;
|
|
|
|
o = (struct output *)cookie;
|
|
origlen = len;
|
|
while (len-- != 0) {
|
|
c = (unsigned char)*buf++;
|
|
outc(c, o);
|
|
}
|
|
|
|
return (origlen);
|
|
}
|
|
|
|
void
|
|
doformat(struct output *dest, const char *f, va_list ap)
|
|
{
|
|
FILE *fp;
|
|
|
|
if ((fp = fwopen(dest, doformat_wr)) != NULL) {
|
|
vfprintf(fp, f, ap);
|
|
fclose(fp);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Version of write which resumes after a signal is caught.
|
|
*/
|
|
|
|
int
|
|
xwrite(int fd, const char *buf, int nbytes)
|
|
{
|
|
int ntry;
|
|
int i;
|
|
int n;
|
|
|
|
n = nbytes;
|
|
ntry = 0;
|
|
for (;;) {
|
|
i = write(fd, buf, n);
|
|
if (i > 0) {
|
|
if ((n -= i) <= 0)
|
|
return nbytes;
|
|
buf += i;
|
|
ntry = 0;
|
|
} else if (i == 0) {
|
|
if (++ntry > 10)
|
|
return nbytes - n;
|
|
} else if (errno != EINTR) {
|
|
return -1;
|
|
}
|
|
}
|
|
}
|