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Improve system call wrappers

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This change improves copy_file_range(), sendfile(), splice(), openpty(),
closefrom(), close_range(), fadvise() and posix_fadvise() in addition to
writing tests that confirm things like errno and seeking behavior across
platforms. We now less aggressively polyfill behavior with some of these
functions when the platform support isn't available. Please see:

https://justine.lol/cosmopolitan/functions.html
This commit is contained in:
Justine Tunney 2022-09-19 15:01:48 -07:00
parent 224c12f54d
commit c7a8cd21e9
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GPG key ID: BE714B4575D6E328
89 changed files with 1151 additions and 414 deletions
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test/libc/calls/splice_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 2022 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/dce.h"
#include "libc/errno.h"
#include "libc/runtime/runtime.h"
#include "libc/sysv/consts/o.h"
#include "libc/testlib/testlib.h"
char testlib_enable_tmp_setup_teardown;
void SetUp(void) {
int e = errno;
if (splice(-1, 0, -1, 0, 0, 0) == -1 && errno == ENOSYS) {
exit(0);
}
errno = e;
}
TEST(splice, einval) {
ASSERT_SYS(0, 0, splice(0, 0, 1, 0, 0, -1));
}
TEST(splice, espipe) {
int64_t x;
int fds[2];
ASSERT_SYS(0, 0, pipe(fds));
ASSERT_SYS(0, 0, splice(0, 0, 4, &x, 0, 0));
ASSERT_SYS(0, 0, close(4));
ASSERT_SYS(0, 0, close(3));
}
TEST(splice, noOffsets_usesFilePointer) {
// this test fails on rhel5 and rhel7
int fds[2];
char buf[16] = {0};
ASSERT_SYS(0, 0, pipe(fds));
ASSERT_SYS(0, 5, open("foo", O_RDWR | O_CREAT | O_TRUNC, 0644));
ASSERT_SYS(0, 5, pwrite(5, "hello", 5, 0));
ASSERT_SYS(0, 5, splice(5, 0, 4, 0, 5, 0));
ASSERT_SYS(0, 5, splice(3, 0, 5, 0, 5, 0));
ASSERT_SYS(0, 10, pread(5, buf, sizeof(buf), 0));
ASSERT_STREQ("hellohello", buf);
ASSERT_SYS(0, 0, close(5));
ASSERT_SYS(0, 0, close(4));
ASSERT_SYS(0, 0, close(3));
}
TEST(splice, offsets_doesntChangePointerAndIsReadOnly) {
int fds[2];
int64_t x = 0;
char buf[16] = {0};
ASSERT_SYS(0, 0, pipe(fds));
ASSERT_SYS(0, 5, open("foo", O_RDWR | O_CREAT | O_TRUNC, 0644));
ASSERT_SYS(0, 5, pwrite(5, "hello", 5, 0));
ASSERT_SYS(0, 5, splice(5, &x, 4, 0, 5, 0));
ASSERT_EQ(5, x);
ASSERT_SYS(0, 5, splice(3, 0, 5, &x, 5, 0));
ASSERT_EQ(10, x);
ASSERT_SYS(0, 10, read(5, buf, sizeof(buf)));
ASSERT_STREQ("hellohello", buf);
ASSERT_SYS(0, 0, close(5));
ASSERT_SYS(0, 0, close(4));
ASSERT_SYS(0, 0, close(3));
}