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/* Tests for fcntl.
Copyright (C) 2000-2022 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 <errno.h>
#include <fcntl.h>
#include <paths.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
/* Prototype for our test function. */
extern void do_prepare (int argc, char *argv[]);
extern int do_test (int argc, char *argv[]);
/* We have a preparation function. */
#define PREPARE do_prepare
#include "../test-skeleton.c"
/* Name of the temporary files. */
static char *name;
/* File descriptor to temporary file. */
static int fd;
void
do_prepare (int argc, char *argv[])
{
size_t name_len;
name_len = strlen (test_dir);
name = xmalloc (name_len + sizeof ("/fcntlXXXXXX"));
mempcpy (mempcpy (name, test_dir, name_len),
"/fcntlXXXXXX", sizeof ("/fcntlXXXXXX"));
/* Create the temporary file. */
fd = mkstemp (name);
if (fd == -1)
{
printf ("cannot open temporary file: %m\n");
exit (1);
}
add_temp_file (name);
}
int
do_test (int argc, char *argv[])
{
int fd2;
int fd3;
struct stat64 st;
int val;
int result = 0;
if (fstat64 (fd, &st) != 0)
{
printf ("cannot stat test file: %m\n");
return 1;
}
if (! S_ISREG (st.st_mode) || st.st_size != 0)
{
puts ("file not created correctly");
return 1;
}
/* Get the flags with fcntl(). */
val = fcntl (fd, F_GETFL);
if (val == -1)
{
printf ("fcntl(fd, F_GETFL) failed: %m\n");
result = 1;
}
else if ((val & O_ACCMODE) != O_RDWR)
{
puts ("temporary file not opened for read and write");
result = 1;
}
/* Set the flags to something else. */
if (fcntl (fd, F_SETFL, O_RDONLY) == -1)
{
printf ("fcntl(fd, F_SETFL, O_RDONLY) failed: %m\n");
result = 1;
}
val = fcntl (fd, F_GETFL);
if (val == -1)
{
printf ("fcntl(fd, F_GETFL) after F_SETFL failed: %m\n");
result = 1;
}
else if ((val & O_ACCMODE) != O_RDWR)
{
puts ("temporary file access mode changed");
result = 1;
}
/* Set the flags to something else. */
if (fcntl (fd, F_SETFL, O_APPEND) == -1)
{
printf ("fcntl(fd, F_SETFL, O_APPEND) failed: %m\n");
result = 1;
}
val = fcntl (fd, F_GETFL);
if (val == -1)
{
printf ("fcntl(fd, F_GETFL) after second F_SETFL failed: %m\n");
result = 1;
}
else if ((val & O_APPEND) == 0)
{
puts ("O_APPEND not set");
result = 1;
}
val = fcntl (fd, F_GETFD);
if (val == -1)
{
printf ("fcntl(fd, F_GETFD) failed: %m\n");
result = 1;
}
else if (fcntl (fd, F_SETFD, val | FD_CLOEXEC) == -1)
{
printf ("fcntl(fd, F_SETFD, FD_CLOEXEC) failed: %m\n");
result = 1;
}
else
{
val = fcntl (fd, F_GETFD);
if (val == -1)
{
printf ("fcntl(fd, F_GETFD) after F_SETFD failed: %m\n");
result = 1;
}
else if ((val & FD_CLOEXEC) == 0)
{
puts ("FD_CLOEXEC not set");
result = 1;
}
}
/* Get a number of a free descriptor. If /dev/null is not available
don't continue testing. */
fd2 = open (_PATH_DEVNULL, O_RDWR);
if (fd2 == -1)
return result;
close (fd2);
fd3 = fcntl (fd, F_DUPFD, fd2 + 1);
if (fd3 == -1)
{
printf ("fcntl(fd, F_DUPFD, %d) failed: %m\n", fd2 + 1);
result = 1;
}
else if (fd3 <= fd2)
{
printf ("F_DUPFD returned %d which is not larger than %d\n", fd3, fd2);
result = 1;
}
if (fd3 != -1)
{
val = fcntl (fd3, F_GETFD);
if (val == -1)
{
printf ("fcntl(fd3, F_GETFD) after F_DUPFD failed: %m\n");
result = 1;
}
else if ((val & FD_CLOEXEC) != 0)
{
puts ("FD_CLOEXEC still set");
result = 1;
}
close (fd3);
}
return result;
}
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