82 lines
1.7 KiB
C
82 lines
1.7 KiB
C
/*
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* Copyright © 2012 Keith Packard <keithp@keithp.com>
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*
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* This program 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; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*/
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#include "fdpass.h"
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void
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child(int sock)
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{
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int fd, nfd;
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char buf[16];
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ssize_t size;
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sleep(1);
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for (;;) {
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nfd = 1;
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size = sock_fd_read(sock, buf, sizeof(buf), &fd, &nfd);
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if (size <= 0)
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break;
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printf ("read %d nfd %d\n", size, nfd);
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if (nfd == 1) {
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write(fd, "hello, world\n", 13);
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close(fd);
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}
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}
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}
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void
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parent(int sock)
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{
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ssize_t size;
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int i;
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int fd;
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fd = 1;
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size = sock_fd_write(sock, "1", 1, NULL, 0);
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printf ("wrote %d without fd\n", size);
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size = sock_fd_write(sock, NULL, 0, &fd, 1);
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printf ("wrote %d with fd\n", size);
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size = sock_fd_write(sock, "1", 1, NULL, 0);
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printf ("wrote %d without fd\n", size);
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}
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int
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main(int argc, char **argv)
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{
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int sv[2];
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int pid;
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if (socketpair(AF_LOCAL, SOCK_STREAM, 0, sv) < 0) {
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perror("socketpair");
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exit(1);
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}
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switch ((pid = fork())) {
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case 0:
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close(sv[0]);
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child(sv[1]);
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break;
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case -1:
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perror("fork");
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exit(1);
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default:
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close(sv[1]);
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parent(sv[0]);
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break;
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}
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return 0;
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}
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