File: [local] / prex / usr / test / pipe / pipe.c (download)
Revision 1.1.1.1 (vendor branch), Tue Aug 19 12:47:02 2008 UTC (16 years ago) by nbrk
Branch: MAIN, KOHSUKE
CVS Tags: PREX_0_8_BASE, HEAD Changes since 1.1: +0 -0 lines
Initial import of Prex, Portable Real-time Embedded POSIX microkernel system.
I have totally new directions in my development (more focused on real hardware, not virtual one).
Old hacks are available in prex-old module. They will be carefully re-designed and merged soon.
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/*
* Copyright (c) 2008, Kohsuke Ohtani
* All rights reserved.
*
* 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. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*/
/*
* pipe.c - test unix pipe
*/
#include <prex/prex.h>
#include <sys/fcntl.h>
#include <sys/stat.h>
#include <sys/errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
static void
test1(void)
{
int fd[2];
char str[] = "test1";
char buf[256];
printf("pipe test program\n");
if (pipe(fd) == -1) {
perror("pipe");
exit(1);
}
write(fd[1], str, sizeof(str));
read(fd[0], buf, sizeof(buf));
printf("str=%s\n", buf);
}
static void
test2(void)
{
int fd[2];
char str[] = "test2: hello!";
char buf[256];
printf("pipe test program\n");
if (pipe(fd) == -1) {
perror("pipe");
exit(1);
}
switch(vfork()) {
case -1:
perror("fork");
break;
case 0: /* child */
close(fd[1]);
read(fd[0], buf, 256);
close(fd[0]);
printf("str=%s\n", buf);
exit(0);
break;
default: /* parent */
close(fd[0]);
write(fd[1], str, sizeof(str));
close(fd[1]);
exit(0);
break;
}
}
int
main(int argc, char *argv[])
{
test2();
return 0;
}