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Commit 332e0e80 authored by Alexey Dobriyan's avatar Alexey Dobriyan Committed by Linus Torvalds
Browse files

proc: more robust bulk read test 

/proc may not be mounted and test will exit successfully.

Ensure proc is mounted at /proc.

Link: http://lkml.kernel.org/r/20190209105613.GA10384@avx2


Signed-off-by: default avatarAlexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent e483b020

tools/testing/selftests/proc/read.c

+14 −0
Original line number Diff line number Diff line
@@ -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 4;



	/* 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;

}