Add the ability to execute a program.

[fips] / execute.c

diff --git a/execute.c b/execute.c
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--- /dev/null
+++ b/execute.c
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+/* Copyright © 2013, Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
+static int
+fork_exec_and_wait (char * const argv[])
+{
+       pid_t pid;
+       int i, status;
+
+       pid = fork ();
+
+       /* Child */
+       if (pid == 0) {
+               execvp (argv[0], argv);
+               fprintf (stderr, "Failed to execute:");
+               for (i = 0; argv[i]; i++) {
+                       fprintf (stderr, " %s", argv[i]);
+               }
+               fprintf (stderr, "\n");
+               exit (1);
+       }
+
+       /* Parent */
+       waitpid (pid, &status, 0);
+       if (WIFEXITED (status)) {
+               return (WEXITSTATUS (status));
+       }
+       if (WIFSIGNALED (status)) {
+               fprintf (stderr, "Child terminated by signal %d\n",
+                        WTERMSIG (status));
+       }
+       return 1;
+}
+
+int
+execute (int argc, char * const argv[])
+{
+       char **execvp_args;
+       int i;
+
+       execvp_args = malloc((argc + 1) * sizeof(char *));
+       if (execvp_args == NULL) {
+               fprintf (stderr, "Out of memory,\n");
+               return 1;
+       }
+
+       for (i = 0; i < argc; i++) {
+               execvp_args[i] = argv[i];
+       }
+
+       /* execvp needs final NULL */
+       execvp_args[i] = NULL;
+
+       return fork_exec_and_wait (execvp_args);
+}