1 files changed, 52 insertions, 0 deletions
diff --git a/test/packetdrill/system.c b/test/packetdrill/system.c
new file mode 100644
index 0000000..1b17abe
--- /dev/null
+++ b/test/packetdrill/system.c
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2013 Google Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+/*
+ * Author: ncardwell@google.com (Neal Cardwell)
+ *
+ * A module to execute a system(3) shell command and check the result.
+ */
+
+#include "system.h"
+
+#include <errno.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
+int safe_system(const char *command, char **error)
+{
+	int status = system(command);
+	if (status == -1) {
+		asprintf(error, "%s", strerror(errno));
+		return STATUS_ERR;
+	}
+	if (WIFSIGNALED(status) &&
+	    (WTERMSIG(status) == SIGINT || WTERMSIG(status) == SIGQUIT)) {
+		asprintf(error, "got signal %d (%s)",
+			 WTERMSIG(status), strsignal(WTERMSIG(status)));
+		return STATUS_ERR;
+	}
+	if (WEXITSTATUS(status) != 0) {
+		asprintf(error, "non-zero status %d", WEXITSTATUS(status));
+		return STATUS_ERR;
+	}
+	return STATUS_OK;
+}