diff options
Diffstat (limited to 'tools/testing/selftests/proc/fd-002-posix-eq.c')
-rw-r--r-- | tools/testing/selftests/proc/fd-002-posix-eq.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/tools/testing/selftests/proc/fd-002-posix-eq.c b/tools/testing/selftests/proc/fd-002-posix-eq.c new file mode 100644 index 000000000..417322ca9 --- /dev/null +++ b/tools/testing/selftests/proc/fd-002-posix-eq.c @@ -0,0 +1,57 @@ +/* + * Copyright © 2018 Alexey Dobriyan <adobriyan@gmail.com> + * + * Permission to use, copy, modify, and 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. + */ +// Test that open(/proc/*/fd/*) opens the same file. +#undef NDEBUG +#include <assert.h> +#include <stdio.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <unistd.h> + +int main(void) +{ + int fd0, fd1, fd2; + struct stat st0, st1, st2; + char buf[64]; + int rv; + + fd0 = open("/", O_DIRECTORY|O_RDONLY); + assert(fd0 >= 0); + + snprintf(buf, sizeof(buf), "/proc/self/fd/%u", fd0); + fd1 = open(buf, O_RDONLY); + assert(fd1 >= 0); + + snprintf(buf, sizeof(buf), "/proc/thread-self/fd/%u", fd0); + fd2 = open(buf, O_RDONLY); + assert(fd2 >= 0); + + rv = fstat(fd0, &st0); + assert(rv == 0); + rv = fstat(fd1, &st1); + assert(rv == 0); + rv = fstat(fd2, &st2); + assert(rv == 0); + + assert(st0.st_dev == st1.st_dev); + assert(st0.st_ino == st1.st_ino); + + assert(st0.st_dev == st2.st_dev); + assert(st0.st_ino == st2.st_ino); + + return 0; +} |