@@ -517,6 +517,89 @@ static void test_shm(void)
chk_error(shmdt(ptr));
}
+static void test_proc_myself_file(void)
+{
+ int fd1, fd2;
+ char link1[PATH_MAX], link2[PATH_MAX];
+ char buf1[PATH_MAX], buf2[PATH_MAX];
+ int buf1_length, buf2_length;
+
+ /* We can open any file that will always exist. */
+ const char *file_path = "/proc/self/comm";
+
+ char file_realpath[PATH_MAX];
+ if (realpath(file_path, file_realpath) == NULL) {
+ error("proc myself: invalid file");
+ }
+
+ fd1 = chk_error(open(file_path, O_RDONLY));
+ sprintf(link1, "/proc/self/fd/%d", fd1);
+
+ /* Lets try to open same file by first link. */
+ fd2 = chk_error(open(link1, O_RDONLY));
+ sprintf(link2, "/proc/self/fd/%d", fd2);
+
+ /* Two links should point to the same file path. */
+ buf1_length = chk_error(readlink(link1, buf1, PATH_MAX));
+ if (strlen(file_realpath) != buf1_length ||
+ strncmp(file_realpath, buf1, buf1_length) != 0) {
+ error("proc myself: invalid link");
+ }
+ buf2_length = chk_error(readlink(link2, buf2, PATH_MAX));
+ if (strlen(file_realpath) != buf2_length ||
+ strncmp(file_realpath, buf2, buf2_length) != 0) {
+ error("proc myself: invalid link");
+ }
+
+ /* We should be able to read same data from each fd. */
+ buf1_length = chk_error(read(fd1, buf1, PATH_MAX));
+ buf2_length = chk_error(read(fd2, buf2, PATH_MAX));
+ if (buf1_length == 0 || buf1_length != buf2_length ||
+ strncmp(buf1, buf2, buf2_length) != 0) {
+ error("proc myself: invalid file content");
+ }
+
+ chk_error(close(fd2));
+ chk_error(close(fd1));
+}
+
+static void test_proc_myself_exe(void)
+{
+ int fd1, fd2;
+ char link1[PATH_MAX], link2[PATH_MAX];
+ char buf1[PATH_MAX], buf2[PATH_MAX];
+ int buf1_length, buf2_length;
+
+ const char *exe_path = "/proc/self/exe";
+
+ char exe_realpath[PATH_MAX];
+ if (realpath(exe_path, exe_realpath) == NULL) {
+ error("proc myself: invalid exe");
+ }
+
+ fd1 = chk_error(open(exe_path, O_RDONLY));
+ sprintf(link1, "/proc/self/fd/%d", fd1);
+
+ /* Lets try to open link once again. */
+ fd2 = chk_error(open(link1, O_RDONLY));
+ sprintf(link2, "/proc/self/fd/%d", fd2);
+
+ /* Two links should point to the same exe path. */
+ buf1_length = chk_error(readlink(link1, buf1, PATH_MAX));
+ if (strlen(exe_realpath) != buf1_length ||
+ strncmp(exe_realpath, buf1, buf1_length) != 0) {
+ error("proc myself: invalid link");
+ }
+ buf2_length = chk_error(readlink(link2, buf2, PATH_MAX));
+ if (strlen(exe_realpath) != buf2_length ||
+ strncmp(exe_realpath, buf2, buf2_length) != 0) {
+ error("proc myself: invalid link");
+ }
+
+ chk_error(close(fd2));
+ chk_error(close(fd1));
+}
+
int main(int argc, char **argv)
{
test_file();
@@ -532,5 +615,7 @@ int main(int argc, char **argv)
test_signal();
test_shm();
+ test_proc_myself_file();
+ test_proc_myself_exe();
return 0;
}
From: Andrew Aladjev <aladjev.andrew@gmail.com> --- tests/tcg/multiarch/linux-test.c | 85 ++++++++++++++++++++++++++++++++ 1 file changed, 85 insertions(+)