Simple shared memory test

1 files changed, 43 insertions, 0 deletions

diff --git a/test/misc/sem.c b/test/misc/sem.c
new file mode 100644
index 000000000..7606fd180
--- /dev/null
+++ b/test/misc/sem.c
@@ -0,0 +1,43 @@
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/ipc.h>
+#include <sys/sem.h>
+
+int main(void)
+{
+    int k, r;
+    union semun {
+	int val;
+	struct semid_ds *buf;
+	unsigned short int *array;
+	struct seminfo *__buf;
+    } sd;
+    struct semid_ds sd_buf;
+
+    k = semget(IPC_PRIVATE, 10, IPC_CREAT | 0666 );
+    printf("%d\n", k);
+
+    if (k < 0) {
+	printf("semget failed: %m\n");
+	return 1;
+    }
+
+    sd.buf = &sd_buf;
+    r = semctl(k, 0, IPC_STAT, sd);
+    printf("%d\n", r);
+
+    if (r < 0) {
+	printf("semctl IPC_STAT failed: %m\n");
+	return 1;
+    }
+
+    printf("sem_nsems = %lu\n", sd_buf.sem_nsems);
+    if (sd_buf.sem_nsems != 10) {
+	printf("failed: incorrect sem_nsems!\n");
+	return 1;
+    }
+
+    printf("succeeded\n");
+
+    return 0;
+}