mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-10 07:10:06 +00:00
581c785bf3
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
102 lines
2.8 KiB
C
102 lines
2.8 KiB
C
/* Test for /proc/self/fd (or /dev/fd) pathname construction.
|
|
Copyright (C) 2020-2022 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <fcntl.h>
|
|
#include <fd_to_filename.h>
|
|
#include <stdio.h>
|
|
#include <support/check.h>
|
|
#include <support/xunistd.h>
|
|
|
|
/* Run a check on one value. */
|
|
static void
|
|
check (int value)
|
|
{
|
|
if (value < 0)
|
|
/* Negative descriptor values violate the precondition. */
|
|
return;
|
|
|
|
struct fd_to_filename storage;
|
|
char *actual = __fd_to_filename (value, &storage);
|
|
char expected[100];
|
|
snprintf (expected, sizeof (expected), FD_TO_FILENAME_PREFIX "%d", value);
|
|
TEST_COMPARE_STRING (actual, expected);
|
|
}
|
|
|
|
/* Check various ranges constructed around powers. */
|
|
static void
|
|
check_ranges (int base)
|
|
{
|
|
unsigned int power = 1;
|
|
do
|
|
{
|
|
for (int factor = 1; factor < base; ++factor)
|
|
for (int shift = -1000; shift <= 1000; ++shift)
|
|
check (factor * power + shift);
|
|
}
|
|
while (!__builtin_mul_overflow (power, base, &power));
|
|
}
|
|
|
|
/* Check that it is actually possible to use a the constructed
|
|
name. */
|
|
static void
|
|
check_open (void)
|
|
{
|
|
int pipes[2];
|
|
xpipe (pipes);
|
|
|
|
struct fd_to_filename storage;
|
|
int read_alias = xopen (__fd_to_filename (pipes[0], &storage), O_RDONLY, 0);
|
|
int write_alias = xopen (__fd_to_filename (pipes[1], &storage), O_WRONLY, 0);
|
|
|
|
/* Ensure that all the descriptor numbers are different. */
|
|
TEST_VERIFY (pipes[0] < pipes[1]);
|
|
TEST_VERIFY (pipes[1] < read_alias);
|
|
TEST_VERIFY (read_alias < write_alias);
|
|
|
|
xwrite (write_alias, "1", 1);
|
|
char buf[16];
|
|
TEST_COMPARE_BLOB ("1", 1, buf, read (pipes[0], buf, sizeof (buf)));
|
|
|
|
xwrite (pipes[1], "2", 1);
|
|
TEST_COMPARE_BLOB ("2", 1, buf, read (read_alias, buf, sizeof (buf)));
|
|
|
|
xwrite (write_alias, "3", 1);
|
|
TEST_COMPARE_BLOB ("3", 1, buf, read (read_alias, buf, sizeof (buf)));
|
|
|
|
xwrite (pipes[1], "4", 1);
|
|
TEST_COMPARE_BLOB ("4", 1, buf, read (pipes[0], buf, sizeof (buf)));
|
|
|
|
xclose (write_alias);
|
|
xclose (read_alias);
|
|
xclose (pipes[1]);
|
|
xclose (pipes[0]);
|
|
}
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
check_ranges (2);
|
|
check_ranges (10);
|
|
|
|
check_open ();
|
|
|
|
return 0;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|