unnamed semaphore test

[libc-test] / src / functional / sem_open.c

diff --git a/src/functional/sem_open.c b/src/functional/sem_open.c
new file mode 100644 (file)
index 0000000..360e491
--- /dev/null
+++ b/src/functional/sem_open.c
@@ -0,0 +1,56 @@
+/* named semaphore sanity check */
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <semaphore.h>
+#include <time.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include "test.h"
+
+#define TEST(c, ...) \
+       ( (c) || (t_error(#c " failed: " __VA_ARGS__),0) )
+
+int main(void)
+{
+       char buf[100];
+       struct timespec ts;
+       sem_t *sem, *sem2;
+       int val;
+
+       clock_gettime(CLOCK_REALTIME, &ts);
+       snprintf(buf, sizeof buf, "/testsuite-%d-%d", (int)getpid(), (int)ts.tv_nsec);
+
+       TEST((sem=sem_open(buf, O_CREAT|O_EXCL, 0700, 1)) != SEM_FAILED,
+               "could not open sem: %s\n", strerror(errno));
+       errno = 0;
+       TEST(sem_open(buf, O_CREAT|O_EXCL, 0700, 1) == SEM_FAILED,
+               "reopening should fail with O_EXCL\n");
+       TEST(errno == EEXIST,
+               "after reopen failure errno is \"%s\" (%d); want EEXIST (%d)\n", strerror(errno), errno, EEXIST);
+
+       TEST(sem_getvalue(sem, &val) == 0, "failed to get sem value\n");
+       TEST(val == 1, "wrong initial semaphore value: %d\n", val);
+
+       TEST((sem2=sem_open(buf, 0)) == sem,
+               "could not reopen sem: got %p, want %p\n", sem2, sem);
+
+       errno = 0;
+       TEST(sem_wait(sem) == 0, "%s\n", strerror(errno));
+       TEST(sem_getvalue(sem2, &val) == 0, "%s\n", strerror(errno));
+       TEST(val == 0, "wrong semaphore value on second handle: %d\n", val);
+
+       errno = 0;
+       TEST(sem_trywait(sem) == -1 && errno == EAGAIN,
+               "trywait on locked sem: got errno \"%s\" (%d), want EAGAIN (%d)\n", strerror(errno), errno, EAGAIN);
+
+       TEST(sem_post(sem) == 0, "%s\n", strerror(errno));
+       TEST(sem_getvalue(sem2, &val) == 0, "%s\n", strerror(errno));
+       TEST(val == 1, "wrong semaphore value on second handle: %d\n", val);
+
+       TEST(sem_close(sem) == 0, "%s\n", strerror(errno));
+       TEST(sem_close(sem) == 0, "%s\n", strerror(errno));
+       TEST(sem_unlink(buf) == 0, "%s\n", strerror(errno));
+       return t_status;
+}