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/* psize.c - Find pipe size. */
/* Copyright (C) 1987, 1991 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
Bash is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Bash is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Bash. If not, see <http://www.gnu.org/licenses/>.
*/
/* Write output in 128-byte chunks until we get a sigpipe or write gets an
EPIPE. Then report how many bytes we wrote. We assume that this is the
pipe size. */
#include <config.h>
#if defined (HAVE_UNISTD_H)
# ifdef _MINIX
# include <sys/types.h>
# endif
# include <unistd.h>
#endif
#include <stdio.h>
#ifndef _MINIX
#include "../bashtypes.h"
#endif
#include <signal.h>
#include <errno.h>
#include "../command.h"
#include "../general.h"
#include "../sig.h"
#ifndef errno
extern int errno;
#endif
int nw;
sighandler
sigpipe (sig)
int sig;
{
fprintf (stderr, "%d\n", nw);
exit (0);
}
int
main (argc, argv)
int argc;
char **argv;
{
char buf[128];
register int i;
for (i = 0; i < 128; i++)
buf[i] = ' ';
signal (SIGPIPE, sigpipe);
nw = 0;
for (;;)
{
int n;
n = write (1, buf, 128);
nw += n;
}
return (0);
}
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