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141 lines
3.4 KiB
Bash
Executable file
141 lines
3.4 KiB
Bash
Executable file
#!/bin/sh
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#
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# Copyright (c) 2011 Peter Holm <pho@FreeBSD.org>
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# sendfile(2) test by kib@
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# Both processes will sit in the sbwait state forever:
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. ../default.cfg
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here=`pwd`
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cd /tmp
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sed '1,/^EOF/d' < $here/$0 > sendfile4.c
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mycc -o sendfile4 -Wall -Wextra -O2 sendfile4.c || exit
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rm -f sendfile4.c
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cd $here
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dd if=/dev/zero of=$diskimage bs=1m count=6 status=none
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/tmp/sendfile4 $diskimage || echo FAIL
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rm -f /tmp/sendfile4 $diskimage
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exit
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EOF
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#include <sys/types.h>
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#include <sys/fcntl.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/uio.h>
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#include <sys/wait.h>
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#include <err.h>
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#include <errno.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <unistd.h>
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static void
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handler(int i __unused) {
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_exit(1);
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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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const char *from_name;
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char *buf;
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int sv[2];
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struct stat st;
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off_t written, pos;
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int child, error, from, status;
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if (argc != 2)
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errx(1, "Usage: %s from", argv[0]);
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from_name = argv[1];
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from = open(from_name, O_RDONLY);
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if (from == -1)
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err(1, "open read %s", from_name);
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error = fstat(from, &st);
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if (error == -1)
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err(1, "stat %s", from_name);
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error = socketpair(AF_UNIX, SOCK_STREAM, 0, sv);
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if (error == -1)
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err(1, "socketpair");
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signal(SIGALRM, handler);
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alarm(120);
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child = fork();
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if (child == -1)
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err(1, "fork");
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else if (child != 0) {
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close(sv[1]);
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pos = 0;
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for (;;) {
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error = sendfile(from, sv[0], pos, st.st_size - pos,
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NULL, &written, 0);
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if (error == -1) {
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if (errno != EAGAIN)
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err(1, "sendfile");
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}
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pos += written;
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if (pos == st.st_size)
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break;
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}
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close(sv[0]);
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waitpid(child, &status, 0);
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} else {
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close(sv[0]);
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buf = malloc(st.st_size);
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if (buf == NULL)
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err(1, "malloc %jd", st.st_size);
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pos = 0;
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for (;;) {
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written = 413;
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if (written > st.st_size - pos)
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written = st.st_size - pos;
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#if 0
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written = st.st_size - pos;
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if (written > 1000)
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written = 1000;
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written = arc4random_uniform(written) + 1;
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#endif
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error = read(sv[1], buf + pos, written);
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if (error == -1)
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err(1, "read");
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else if (error == 0)
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errx(1, "short read");
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pos += error;
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if (pos == st.st_size)
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break;
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}
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close(sv[1]);
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_exit(0);
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}
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return (0);
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}
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