Add test cases for command-line parsing

Preparation for refactoring command-line parsing.
All these test cases pass.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

1 files changed, 92 insertions, 0 deletions

diff --git a/test-common.c b/test-common.c
new file mode 100644
index 0000000..4ea84c8
--- /dev/null
+++ b/test-common.c
@@ -0,0 +1,92 @@
+/****************************************************************************
+ * Common test functions for ethtool
+ * Copyright 2011 Solarflare Communications Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation, incorporated herein by reference.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <sys/fcntl.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include "internal.h"
+
+int test_cmdline(const char *args)
+{
+	int argc, i;
+	char **argv;
+	const char *arg;
+	size_t len;
+	pid_t pid;
+	int dev_null;
+	int status;
+	int rc;
+
+	/* Convert line to argv */
+	argc = 1;
+	arg = args;
+	for (;;) {
+		len = strcspn(arg, " ");
+		if (len == 0)
+			break;
+		argc++;
+		if (arg[len] == 0)
+			break;
+		arg += len + 1;
+	}
+	argv = calloc(argc + 1, sizeof(argv[0]));
+	argv[0] = strdup("ethtool");
+	arg = args;
+	for (i = 1; i < argc; i++) {
+		len = strcspn(arg, " ");
+		argv[i] = malloc(len + 1);
+		memcpy(argv[i], arg, len);
+		argv[i][len] = 0;
+		arg += len + 1;
+	}
+
+	dev_null = open("/dev/null", O_RDWR);
+	if (dev_null < 0) {
+		perror("open /dev/null");
+		rc = -1;
+		goto out;
+	}
+
+	fflush(NULL);
+	pid = fork();
+
+	/* Child */
+	if (pid == 0) {
+		dup2(dev_null, STDIN_FILENO);
+		if (!getenv("ETHTOOL_TEST_VERBOSE")) {
+			dup2(dev_null, STDOUT_FILENO);
+			dup2(dev_null, STDERR_FILENO);
+		}
+		execv("./test-one-cmdline", argv);
+		_exit(126);
+	}
+
+	/* Parent */
+	if (pid < 0) {
+		perror("fork");
+		close(dev_null);
+		rc = -1;
+		goto out;
+	}
+	close(dev_null);
+	if (waitpid(pid, &status, 0) < 0) {
+		perror("waitpid");
+		rc = -1;
+		goto out;
+	}
+	rc = WIFEXITED(status) ? WEXITSTATUS(status) : -1;
+
+out:
+	for (i = 0; i < argc; i++)
+		free(argv[i]);
+	free(argv);
+	return rc;
+}