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