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+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2012 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.
+ *
+ * version: DPDK.L.1.2.3-3
+ */
+
+#ifndef _PROCESS_H_
+#define _PROCESS_H_
+
+#ifndef RTE_EXEC_ENV_BAREMETAL
+
+/*
+ * 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)
+{
+ char *argv_cpy[numargs + 1];
+ 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]);
+ argv_cpy[i] = NULL;
+
+ /* 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-- ) {
+ rte_snprintf(path, sizeof(path), "/proc/self/fd/%d", fd);
+ if (access(path, F_OK) == 0)
+ close(fd);
+ }
+ printf("Running binary with argv[]:");
+ for (i = 0; i < numargs; 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 /* not baremetal */
+
+#endif /* _PROCESS_H_ */