pipecmd: fix fd leak.

[ccan] / ccan / pipecmd / test / run-fdleak.c

diff --git a/ccan/pipecmd/test/run-fdleak.c b/ccan/pipecmd/test/run-fdleak.c
new file mode 100644 (file)
index 0000000..9ab9d1b
--- /dev/null
+++ b/ccan/pipecmd/test/run-fdleak.c
@@ -0,0 +1,44 @@
+#include <ccan/pipecmd/pipecmd.h>
+/* Include the C files directly. */
+#include <ccan/pipecmd/pipecmd.c>
+#include <ccan/tap/tap.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
+int main(int argc, char *argv[])
+{
+       pid_t child;
+       int outfd, status;
+       char buf[5] = "test";
+
+       /* We call ourselves, to test pipe. */
+       if (argc == 2) {
+               if (write(STDOUT_FILENO, buf, sizeof(buf)) != sizeof(buf))
+                               exit(1);
+               exit(0);
+       }
+
+       /* This is how many tests you plan to run */
+       plan_tests(13);
+       child = pipecmd(&outfd, NULL, argv[0], "out", NULL);
+       if (!ok1(child > 0))
+               exit(1);
+       ok1(read(outfd, buf, sizeof(buf)) == sizeof(buf));
+       ok1(memcmp(buf, "test", sizeof(buf)) == 0);
+       ok1(waitpid(child, &status, 0) == child);
+       ok1(WIFEXITED(status));
+       ok1(WEXITSTATUS(status) == 0);
+
+       /* No leaks! */
+       ok1(close(outfd) == 0);
+       ok1(close(outfd) == -1 && errno == EBADF);
+       ok1(close(++outfd) == -1 && errno == EBADF);
+       ok1(close(++outfd) == -1 && errno == EBADF);
+       ok1(close(++outfd) == -1 && errno == EBADF);
+       ok1(close(++outfd) == -1 && errno == EBADF);
+       ok1(close(++outfd) == -1 && errno == EBADF);
+
+       /* This exits depending on whether all tests passed */
+       return exit_status();
+}