[LTP] [PATCH] ltp-aiodio/dio_append: fix dio_append()

[dongshijiang]

When running the dio_append test in the ltp-aiodiio.part4 test item, there was a problem that the file could not be created, but the test result was PASS. To this end, the following operations have been added.
1. create the directory where the file is located.
2. rewrite the dio_append API. Add relevant return values.

Signed-off-by: dongshijiang <dongshijiang@inspur.com>
---
 testcases/kernel/io/ltp-aiodio/dio_append.c | 26 +++++++++++++++------
 1 file changed, 19 insertions(+), 7 deletions(-)

diff --git a/testcases/kernel/io/ltp-aiodio/dio_append.c b/testcases/kernel/io/ltp-aiodio/dio_append.c
index 3f0ed29d5..500dfdc31 100644
--- a/testcases/kernel/io/ltp-aiodio/dio_append.c
+++ b/testcases/kernel/io/ltp-aiodio/dio_append.c
@@ -75,7 +75,7 @@ int read_eof(char *filename)
 	return 0;
 }
 
-void dio_append(char *filename)
+int dio_append(char *filename)
 {
 	int fd;
 	void *bufptr;
@@ -86,14 +86,14 @@ void dio_append(char *filename)
 
 	if (fd < 0) {
 		perror("cannot create file");
-		return;
+		return 1;
 	}
 
 	TEST(posix_memalign(&bufptr, 4096, 64 * 1024));
 	if (TEST_RETURN) {
 		tst_resm(TBROK | TRERRNO, "cannot malloc aligned memory");
 		close(fd);
-		return;
+		return 1;
 	}
 
 	memset(bufptr, 0, 64 * 1024);
@@ -102,17 +102,29 @@ void dio_append(char *filename)
 			fprintf(stderr, "write %d returned %d\n", i, w);
 		}
 	}
+	return 0;
 }
 
 int main(void)
 {
-	char filename[PATH_MAX];
+	char filename[PATH_MAX], filepath[PATH_MAX-5];
 	int pid[NUM_CHILDREN];
 	int num_children = 1;
 	int i;
+	int ret = -1;
 
-	snprintf(filename, sizeof(filename), "%s/aiodio/file",
+	snprintf(filepath, sizeof(filepath), "%s/aiodio",
 		 getenv("TMP") ? getenv("TMP") : "/tmp");
+
+	if (access(filepath, F_OK) == -1) {
+		char command[PATH_MAX + 10];
+
+		snprintf(command, sizeof(command), "mkdir -p %s", filepath);
+		if (system(command) != 0)
+			return 1;
+	}
+
+	snprintf(filename, sizeof(filename), "%s/file", filepath);
 
 	printf("Begin dio_append test...\n");
 
@@ -134,10 +146,10 @@ int main(void)
 	 * Parent appends to end of file using direct i/o
 	 */
 
-	dio_append(filename);
+	ret = dio_append(filename);
 
 	for (i = 0; i < num_children; i++) {
 		kill(pid[i], SIGTERM);
 	}
-	return 0;
+	return ret;
 }
-- 
2.27.0