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glibc/io/tst-fcntl.c
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/* Tests for fcntl. | |
Copyright (C) 2000-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
Contributed by Ulrich Drepper <drepper@cygnus.com>, 2000. | |
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 | |
<http://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 = malloc (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; | |
} |