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Justine Tunney 2020-06-15 07:18:57 -07:00
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test/libc/calls/fallocate_test.c Normal file
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ This program is free software; you can redistribute it and/or modify │
│ it under the terms of the GNU General Public License as published by │
│ the Free Software Foundation; version 2 of the License. │
│ │
│ This program is distributed in the hope that it will be useful, but │
│ WITHOUT ANY WARRANTY; without even the implied warranty of │
│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
│ General Public License for more details. │
│ │
│ You should have received a copy of the GNU General Public License │
│ along with this program; if not, write to the Free Software │
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
│ 02110-1301 USA │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/bits/safemacros.h"
#include "libc/dce.h"
#include "libc/errno.h"
#include "libc/runtime/gc.h"
#include "libc/runtime/runtime.h"
#include "libc/stdio/stdio.h"
#include "libc/calls/struct/stat.h"
#include "libc/calls/calls.h"
#include "libc/testlib/testlib.h"
#include "libc/x/x.h"
int rc;
struct stat st;
const char *path;
int64_t fd, emptyspace, physicalspace;
TEST(fallocate_000, setup) {
mkdir("o", 0755);
mkdir("o/tmp", 0755);
}
TEST(fallocate_010, testBadFileDescriptor) {
if (IsFreebsd()) return; /* TODO: FreeBSD failing to set carry flag bug */
ASSERT_EQ(-1, fallocate(/*RHEL*/ 5, 0, 0, 1));
if (errno == ENOSYS) exit(0);
EXPECT_EQ(EBADF, errno);
}
TEST(fallocate_020, test) {
path = gc(xasprintf("o/tmp/%s.%d", program_invocation_short_name));
ASSERT_NE(-1, (fd = creat(path, 0755)));
ASSERT_EQ(5, write(fd, "hello", 5));
errno = 31337;
ASSERT_NE(-1, fallocate(fd, 0, 0, 31337));
EXPECT_EQ(31337, errno);
ASSERT_EQ(5, write(fd, "world", 5));
ASSERT_NE(-1, close(fd));
ASSERT_NE(-1, stat(path, &st));
ASSERT_EQ(31337, st.st_size);
ASSERT_BINEQ(u"helloworld", gc(slurp(path, NULL)));
unlink(path);
}
TEST(fallocate_020, testSparseFile) {
ASSERT_NE(-1, stat("o", &st));
emptyspace = rounddown(6 * 1000 * 1000 * 1000, st.st_blksize);
physicalspace = roundup(4096, st.st_blksize);
path = gc(xasprintf("o/tmp/%s.%d", program_invocation_short_name, getpid()));
ASSERT_NE(-1, (fd = creat(path, 0755)));
rc = fallocate(fd, 0, emptyspace, physicalspace);
if (rc == -1) {
/*
* most important feature is failing w/ enosys if not possible to
* allocate storage like a central banker prints money.
*/
ASSERT_EQ(ENOSYS, errno);
}
ASSERT_EQ(emptyspace, lseek(fd, emptyspace, SEEK_SET));
ASSERT_EQ(5, write(fd, "hello", 5));
ASSERT_NE(-1, fsync(fd));
ASSERT_NE(-1, close(fd));
ASSERT_NE(-1, stat(path, &st));
EXPECT_EQ(emptyspace + physicalspace, st.st_size);
/*
* don't care how much physical space system needs, so long as it's
* transparent and less than 10 percent the fake space
*/
EXPECT_NE(0, st.st_blocks);
EXPECT_LT(st.st_blocks * 512, emptyspace / 10);
unlink(path);
}