From: Alexey Dobriyan <adobriyan@gmail.com>
To: akpm@linux-foundation.org
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH 1/2] proc: test /proc/self/wchan
Date: Tue, 27 Feb 2018 00:20:07 +0300 [thread overview]
Message-ID: <20180226212006.GA742@avx2> (raw)
This patch starts testing /proc. Many more tests to come (I promise).
Read from /proc/self/wchan should always return "0" as
current is in TASK_RUNNING state while reading /proc/self/wchan.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
---
tools/testing/selftests/Makefile | 1 +
tools/testing/selftests/proc/.gitignore | 1 +
tools/testing/selftests/proc/Makefile | 6 ++++++
tools/testing/selftests/proc/config | 1 +
tools/testing/selftests/proc/proc-self-wchan.c | 25 +++++++++++++++++++++++++
6 files changed, 35 insertions(+)
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -23,6 +23,7 @@ TARGETS += mqueue
TARGETS += net
TARGETS += nsfs
TARGETS += powerpc
+TARGETS += proc
TARGETS += pstore
TARGETS += ptrace
TARGETS += seccomp
new file mode 100644
--- /dev/null
+++ b/tools/testing/selftests/proc/.gitignore
@@ -0,0 +1 @@
+/proc-self-wchan
new file mode 100644
--- /dev/null
+++ b/tools/testing/selftests/proc/Makefile
@@ -0,0 +1,6 @@
+CFLAGS += -Wall -O2
+
+TEST_GEN_PROGS :=
+TEST_GEN_PROGS += proc-self-wchan
+
+include ../lib.mk
new file mode 100644
--- /dev/null
+++ b/tools/testing/selftests/proc/config
@@ -0,0 +1 @@
+CONFIG_PROC_FS=y
new file mode 100644
--- /dev/null
+++ b/tools/testing/selftests/proc/proc-self-wchan.c
@@ -0,0 +1,25 @@
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <unistd.h>
+
+int main(void)
+{
+ char buf[64];
+ int fd;
+
+ fd = open("/proc/self/wchan", O_RDONLY);
+ if (fd == -1) {
+ if (errno == ENOENT)
+ return 2;
+ return 1;
+ }
+
+ buf[0] = '\0';
+ if (read(fd, buf, sizeof(buf)) != 1)
+ return 1;
+ if (buf[0] != '0')
+ return 1;
+ return 0;
+}
reply other threads:[~2018-02-26 21:20 UTC|newest]
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