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 <[email protected]> --- 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; +}
