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: Osama Muhammad <osmtendev@xxxxxxxxx>
---
.../selftests/prctl/set-process-name.c | 32 +++++++++++++++++++
1 file changed, 32 insertions(+)
diff --git a/tools/testing/selftests/prctl/set-process-name.c b/tools/testing/selftests/prctl/set-process-name.c
index 3bc5e0e09..562f707ba 100644
--- a/tools/testing/selftests/prctl/set-process-name.c
+++ b/tools/testing/selftests/prctl/set-process-name.c
@@ -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
--
2.34.1
