1 files changed, 103 insertions, 0 deletions
diff --git a/app/test/process.h b/app/test/process.h
new file mode 100644
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+++ b/app/test/process.h
@@ -0,0 +1,103 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _PROCESS_H_
+#define _PROCESS_H_
+
+#ifdef RTE_EXEC_ENV_BSDAPP
+#define self "curproc"
+#define exe "file"
+#else
+#define self "self"
+#define exe "exe"
+#endif
+
+/*
+ * launches a second copy of the test process using the given argv parameters,
+ * which should include argv[0] as the process name. To identify in the
+ * subprocess the source of the call, the env_value parameter is set in the
+ * environment as $RTE_TEST
+ */
+static inline int
+process_dup(const char *const argv[], int numargs, const char *env_value)
+{
+	int num;
+#ifdef RTE_LIBRTE_XEN_DOM0
+	char *argv_cpy[numargs + 2];
+#else
+	char *argv_cpy[numargs + 1];
+#endif
+	int i, fd, status;
+	char path[32];
+
+	pid_t pid = fork();
+	if (pid < 0)
+		return -1;
+	else if (pid == 0) {
+		/* make a copy of the arguments to be passed to exec */
+		for (i = 0; i < numargs; i++)
+			argv_cpy[i] = strdup(argv[i]);
+#ifdef RTE_LIBRTE_XEN_DOM0
+		argv_cpy[i] = strdup("--xen-dom0");
+		argv_cpy[i + 1] = NULL;
+		num = numargs + 1;
+#else
+		argv_cpy[i] = NULL;
+		num = numargs;
+#endif
+
+		/* close all open file descriptors, check /proc/self/fd to only
+		 * call close on open fds. Exclude fds 0, 1 and 2*/
+		for (fd = getdtablesize(); fd > 2; fd-- ) {
+			snprintf(path, sizeof(path), "/proc/" exe "/fd/%d", fd);
+			if (access(path, F_OK) == 0)
+				close(fd);
+		}
+		printf("Running binary with argv[]:");
+		for (i = 0; i < num; i++)
+			printf("'%s' ", argv_cpy[i]);
+		printf("\n");
+
+		/* set the environment variable */
+		if (setenv(RECURSIVE_ENV_VAR, env_value, 1) != 0)
+			rte_panic("Cannot export environment variable\n");
+		if (execv("/proc/" self "/" exe, argv_cpy) < 0)
+			rte_panic("Cannot exec\n");
+	}
+	/* parent process does a wait */
+	while (wait(&status) != pid)
+		;
+	return status;
+}
+
+#endif /* _PROCESS_H_ */