freebsd-dev/tests/sys/file/ftruncate_test.c
Enji Cooper 71784da9b1 Tweak r319058 slightly
- Specify an explicit mode when using O_CREAT per open(2).
- Fix the error message (add missing enclosing parentheses).

Submitted by:	jilles
MFC after:	3 days
MFC with:	r319058
Sponsored by:	Dell EMC Isilon
2017-05-28 17:50:29 +00:00

177 lines
5.0 KiB
C

/*-
* Copyright (c) 2006 Robert N. M. Watson
* 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.
*
* 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.
*
* $FreeBSD$
*/
/*
* Very simple regression test.
*
* Future tests that might be of interest:
*
* - Make sure we get EISDIR on a directory.
*/
#include <sys/types.h>
#include <sys/event.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <limits.h>
#include <stdio.h>
#include <unistd.h>
/*
* Select various potentially interesting lengths at and around power of 2
* edges.
*/
static off_t lengths[] = {0, 1, 2, 3, 4, 127, 128, 129, 511, 512, 513, 1023,
1024, 1025, 2047, 2048, 2049, 4095, 4096, 4097, 8191, 8192, 8193, 16383,
16384, 16385};
static int lengths_count = sizeof(lengths) / sizeof(off_t);
int
main(void)
{
int error, fd, fds[2], i, read_only_fd;
char path[] = "ftruncate_file";
struct stat sb;
ssize_t size;
off_t len;
char ch;
/*
* Tests using a writable file: grow and then shrink a file
* using ftruncate and various lengths. Make sure that a negative
* file length is rejected. Make sure that when we grow the file,
* bytes now in the range of the file size return 0.
*
* Save a read-only reference to the file to use later for read-only
* descriptor tests.
*/
fd = open(path, O_RDWR|O_CREAT, 0600);
if (fd < 0)
err(1, "open(%s, O_RDWR|O_CREAT, 0600)", path);
read_only_fd = open(path, O_RDONLY);
if (read_only_fd < 0) {
error = errno;
(void)unlink(path);
errno = error;
err(1, "open(%s, O_RDONLY)", path);
}
(void)unlink(path);
if (ftruncate(fd, -1) == 0)
errx(1, "ftruncate(fd, -1) succeeded unexpectedly");
if (errno != EINVAL)
err(1, "ftruncate(fd, -1) returned wrong error");
for (i = 0; i < lengths_count; i++) {
len = lengths[i];
if (ftruncate(fd, len) < 0)
err(1, "ftruncate(%jd) up", (intmax_t)len);
if (fstat(fd, &sb) < 0)
err(1, "stat");
if (sb.st_size != len)
errx(-1, "fstat with len=%jd returned len %jd up",
(intmax_t)len, (intmax_t)sb.st_size);
if (len != 0) {
size = pread(fd, &ch, sizeof(ch), len - 1);
if (size < 0)
err(1, "pread on len %jd up", (intmax_t)len);
if (size != sizeof(ch))
errx(-1, "pread len %jd size %jd up",
(intmax_t)len, (intmax_t)size);
if (ch != 0)
errx(-1,
"pread length %jd size %jd ch %d up",
(intmax_t)len, (intmax_t)size, ch);
}
}
for (i = lengths_count - 1; i >= 0; i--) {
len = lengths[i];
if (ftruncate(fd, len) < 0)
err(1, "ftruncate(%jd) down", (intmax_t)len);
if (fstat(fd, &sb) < 0)
err(1, "stat");
if (sb.st_size != len)
errx(-1, "fstat(%jd) returned %jd down", (intmax_t)len,
sb.st_size);
}
close(fd);
/*
* Make sure that a read-only descriptor can't be truncated.
*/
if (ftruncate(read_only_fd, 0) == 0)
errx(-1, "ftruncate(read_only_fd) succeeded");
if (errno != EINVAL)
err(1, "ftruncate(read_only_fd) returned wrong error");
close(read_only_fd);
/*
* Make sure that ftruncate on sockets doesn't work.
*/
fd = socket(PF_UNIX, SOCK_STREAM, 0);
if (fd < 0)
err(1, "socket(PF_UNIX, SOCK_STREAM, 0)");
if (ftruncate(fd, 0) == 0)
errx(-1, "ftruncate(socket) succeeded");
if (errno != EINVAL)
err(1, "ftruncate(socket) returned wrong error");
close(fd);
/*
* Make sure that ftruncate on pipes doesn't work.
*/
if (pipe(fds) < 0)
err(1, "pipe");
if (ftruncate(fds[0], 0) == 0)
errx(-1, "ftruncate(pipe) succeeded");
if (errno != EINVAL)
err(1, "ftruncate(pipe) returned wrong error");
close(fds[0]);
close(fds[1]);
/*
* Make sure that ftruncate on kqueues doesn't work.
*/
fd = kqueue();
if (fd < 0)
err(1, "kqueue");
if (ftruncate(fds[0], 0) == 0)
errx(-1, "ftruncate(kqueue) succeeded");
if (errno != EINVAL)
err(1, "ftruncate(kqueue) returned wrong error");
close(fd);
return (0);
}