5134c3f799
o Old-style K&R declarations have been converted to new C89 style
o register has been removed
o prototype for main() has been removed (gcc3 makes it an error)
o int main(int argc, char *argv[]) is the preferred main definition.
o Attempt to not break style(9) conformance for declarations more than
they already are.
o Change
int
foo() {
...
to
int
foo(void)
{
...
457 lines
9.1 KiB
C
457 lines
9.1 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.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 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
|
|
static const char rcsid[] =
|
|
"$FreeBSD$";
|
|
#endif /* not lint */
|
|
|
|
/*
|
|
* 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.
|
|
* Our output routines may be smaller than the stdio routines.
|
|
*/
|
|
|
|
#include <sys/types.h> /* quad_t */
|
|
#include <sys/ioctl.h>
|
|
|
|
#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"
|
|
|
|
|
|
#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 */
|
|
|
|
|
|
struct output output = {NULL, 0, NULL, OUTBUFSIZ, 1, 0};
|
|
struct output errout = {NULL, 0, NULL, 100, 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
|
|
out2str(const char *p)
|
|
{
|
|
outstr(p, out2);
|
|
}
|
|
|
|
|
|
void
|
|
outstr(const char *p, struct output *file)
|
|
{
|
|
while (*p)
|
|
outc(*p++, file);
|
|
if (file == out2)
|
|
flushout(file);
|
|
}
|
|
|
|
|
|
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
|
|
dprintf(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;
|
|
|
|
va_start(ap, fmt);
|
|
strout.nextc = outbuf;
|
|
strout.nleft = length;
|
|
strout.fd = BLOCK_OUT;
|
|
strout.flags = 0;
|
|
doformat(&strout, fmt, ap);
|
|
outc('\0', &strout);
|
|
if (strout.flags & OUTPUT_ERR)
|
|
outbuf[length - 1] = '\0';
|
|
}
|
|
|
|
/*
|
|
* Formatted output. This routine handles a subset of the printf formats:
|
|
* - Formats supported: d, u, o, X, s, and c.
|
|
* - The x format is also accepted but is treated like X.
|
|
* - The l and q modifiers are accepted.
|
|
* - The - and # flags are accepted; # only works with the o format.
|
|
* - Width and precision may be specified with any format except c.
|
|
* - An * may be given for the width or precision.
|
|
* - The obsolete practice of preceding the width with a zero to get
|
|
* zero padding is not supported; use the precision field.
|
|
* - A % may be printed by writing %% in the format string.
|
|
*/
|
|
|
|
#define TEMPSIZE 24
|
|
|
|
static const char digit[] = "0123456789ABCDEF";
|
|
|
|
|
|
void
|
|
doformat(struct output *dest, const char *f, va_list ap)
|
|
{
|
|
char c;
|
|
char temp[TEMPSIZE];
|
|
int flushleft;
|
|
int sharp;
|
|
int width;
|
|
int prec;
|
|
int islong;
|
|
int isquad;
|
|
char *p;
|
|
int sign;
|
|
quad_t l;
|
|
u_quad_t num;
|
|
unsigned base;
|
|
int len;
|
|
int size;
|
|
int pad;
|
|
|
|
while ((c = *f++) != '\0') {
|
|
if (c != '%') {
|
|
outc(c, dest);
|
|
continue;
|
|
}
|
|
flushleft = 0;
|
|
sharp = 0;
|
|
width = 0;
|
|
prec = -1;
|
|
islong = 0;
|
|
isquad = 0;
|
|
for (;;) {
|
|
if (*f == '-')
|
|
flushleft++;
|
|
else if (*f == '#')
|
|
sharp++;
|
|
else
|
|
break;
|
|
f++;
|
|
}
|
|
if (*f == '*') {
|
|
width = va_arg(ap, int);
|
|
f++;
|
|
} else {
|
|
while (is_digit(*f)) {
|
|
width = 10 * width + digit_val(*f++);
|
|
}
|
|
}
|
|
if (*f == '.') {
|
|
if (*++f == '*') {
|
|
prec = va_arg(ap, int);
|
|
f++;
|
|
} else {
|
|
prec = 0;
|
|
while (is_digit(*f)) {
|
|
prec = 10 * prec + digit_val(*f++);
|
|
}
|
|
}
|
|
}
|
|
if (*f == 'l') {
|
|
islong++;
|
|
f++;
|
|
} else if (*f == 'q') {
|
|
isquad++;
|
|
f++;
|
|
}
|
|
switch (*f) {
|
|
case 'd':
|
|
if (isquad)
|
|
l = va_arg(ap, quad_t);
|
|
else if (islong)
|
|
l = va_arg(ap, long);
|
|
else
|
|
l = va_arg(ap, int);
|
|
sign = 0;
|
|
num = l;
|
|
if (l < 0) {
|
|
num = -l;
|
|
sign = 1;
|
|
}
|
|
base = 10;
|
|
goto number;
|
|
case 'u':
|
|
base = 10;
|
|
goto uns_number;
|
|
case 'o':
|
|
base = 8;
|
|
goto uns_number;
|
|
case 'x':
|
|
/* we don't implement 'x'; treat like 'X' */
|
|
case 'X':
|
|
base = 16;
|
|
uns_number: /* an unsigned number */
|
|
sign = 0;
|
|
if (isquad)
|
|
num = va_arg(ap, u_quad_t);
|
|
else if (islong)
|
|
num = va_arg(ap, unsigned long);
|
|
else
|
|
num = va_arg(ap, unsigned int);
|
|
number: /* process a number */
|
|
p = temp + TEMPSIZE - 1;
|
|
*p = '\0';
|
|
while (num) {
|
|
*--p = digit[num % base];
|
|
num /= base;
|
|
}
|
|
len = (temp + TEMPSIZE - 1) - p;
|
|
if (prec < 0)
|
|
prec = 1;
|
|
if (sharp && *f == 'o' && prec <= len)
|
|
prec = len + 1;
|
|
pad = 0;
|
|
if (width) {
|
|
size = len;
|
|
if (size < prec)
|
|
size = prec;
|
|
size += sign;
|
|
pad = width - size;
|
|
if (flushleft == 0) {
|
|
while (--pad >= 0)
|
|
outc(' ', dest);
|
|
}
|
|
}
|
|
if (sign)
|
|
outc('-', dest);
|
|
prec -= len;
|
|
while (--prec >= 0)
|
|
outc('0', dest);
|
|
while (*p)
|
|
outc(*p++, dest);
|
|
while (--pad >= 0)
|
|
outc(' ', dest);
|
|
break;
|
|
case 's':
|
|
p = va_arg(ap, char *);
|
|
pad = 0;
|
|
if (width) {
|
|
len = strlen(p);
|
|
if (prec >= 0 && len > prec)
|
|
len = prec;
|
|
pad = width - len;
|
|
if (flushleft == 0) {
|
|
while (--pad >= 0)
|
|
outc(' ', dest);
|
|
}
|
|
}
|
|
prec++;
|
|
while (--prec != 0 && *p)
|
|
outc(*p++, dest);
|
|
while (--pad >= 0)
|
|
outc(' ', dest);
|
|
break;
|
|
case 'c':
|
|
c = va_arg(ap, int);
|
|
outc(c, dest);
|
|
break;
|
|
default:
|
|
outc(*f, dest);
|
|
break;
|
|
}
|
|
f++;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* Version of write which resumes after a signal is caught.
|
|
*/
|
|
|
|
int
|
|
xwrite(int fd, 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;
|
|
}
|
|
}
|
|
}
|