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Subject[PATCH] proc: more robust bulk read test
/proc may not be mounted and test will exit successfully.

Ensure proc is mounted at /proc.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
---

tools/testing/selftests/proc/read.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)

--- a/tools/testing/selftests/proc/read.c
+++ b/tools/testing/selftests/proc/read.c
@@ -26,8 +26,10 @@
#include <dirent.h>
#include <stdbool.h>
#include <stdlib.h>
+#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
+#include <sys/vfs.h>
#include <fcntl.h>
#include <unistd.h>

@@ -123,10 +125,22 @@ static void f(DIR *d, unsigned int level)
int main(void)
{
DIR *d;
+ struct statfs sfs;

d = opendir("/proc");
if (!d)
return 2;
+
+ /* Ensure /proc is proc. */
+ if (fstatfs(dirfd(d), &sfs) == -1) {
+ return 1;
+ }
+ if (sfs.f_type != 0x9fa0) {
+ fprintf(stderr, "error: unexpected f_type %lx\n", (long)sfs.f_type);
+ return 2;
+ }
+
f(d, 0);
+
return 0;
}
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