Commit d837813f authored by Osama Muhammad's avatar Osama Muhammad Committed by Shuah Khan
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selftests: prctl: Add prctl test for PR_GET_NAME 



This patch covers the testing of PR_GET_NAME by
reading it's value from proc/self/task/pid/comm
and matching it with the value returned by PR_GET_NAME.
If the values are matched then it's successful, otherwise
it fails.

changes since v1:
	- Handled fscanf,fopen error checking.
	- Defined MAX_PATH_LEN.

Signed-off-by: default avatarOsama Muhammad <osmtendev@gmail.com>
Signed-off-by: default avatarShuah Khan <skhan@linuxfoundation.org>
parent 25cfe960

tools/testing/selftests/prctl/set-process-name.c

+32 −0
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ 
#define CHANGE_NAME "changename"

#define EMPTY_NAME ""

#define TASK_COMM_LEN 16

#define MAX_PATH_LEN 50



int set_name(char *name)

{
@@ -47,6 +48,35 @@ int check_null_pointer(char *check_name) 
	return res;

}



int check_name(void)

{



	int pid;



	pid = getpid();

	FILE *fptr = NULL;

	char path[MAX_PATH_LEN] = {};

	char name[TASK_COMM_LEN] = {};

	char output[TASK_COMM_LEN] = {};

	int j;



	j = snprintf(path, MAX_PATH_LEN, "/proc/self/task/%d/comm", pid);

	fptr = fopen(path, "r");

	if (!fptr)

		return -EIO;



	fscanf(fptr, "%s", output);

	if (ferror(fptr))

		return -EIO;



	int res = prctl(PR_GET_NAME, name, NULL, NULL, NULL);



	if (res < 0)

		return -errno;



	return !strcmp(output, name);

}



TEST(rename_process) {



	EXPECT_GE(set_name(CHANGE_NAME), 0);
@@ -57,6 +87,8 @@ TEST(rename_process) { 


	EXPECT_GE(set_name(CHANGE_NAME), 0);

	EXPECT_LT(check_null_pointer(CHANGE_NAME), 0);



	EXPECT_TRUE(check_name());

}



TEST_HARNESS_MAIN