/**************************************************************************** * apps/builtin/exec_builtin.c * * Originally by: * * Copyright (C) 2011 Uros Platise. All rights reserved. * Author: Uros Platise * * With subsequent updates, modifications, and general maintenance by: * * Copyright (C) 2012-2013 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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. * 3. Neither the name NuttX 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. * ****************************************************************************/ /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include #include #include "builtin/builtin.h" /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: exec_builtin * * Description: * Executes builtin applications registered during 'make context' time. * New application is run in a separate task context (and thread). * * Input Parameter: * filename - Name of the linked-in binary to be started. * argv - Argument list * redirfile - If output if redirected, this parameter will be non-NULL * and will provide the full path to the file. * oflags - If output is redirected, this parameter will provide the * open flags to use. This will support file replacement * of appending to an existing file. * * Returned Value: * This is an end-user function, so it follows the normal convention: * Returns the PID of the exec'ed module. On failure, it.returns * -1 (ERROR) and sets errno appropriately. * ****************************************************************************/ int exec_builtin(FAR const char *appname, FAR char * const *argv, FAR const char *redirfile, int oflags) { FAR const struct builtin_s *builtin; posix_spawnattr_t attr; posix_spawn_file_actions_t file_actions; struct sched_param param; pid_t pid; int index; int ret; /* Verify that an application with this name exists */ index = builtin_isavail(appname); if (index < 0) { ret = ENOENT; goto errout_with_errno; } /* Get information about the builtin */ builtin = builtin_for_index(index); if (builtin == NULL) { ret = ENOENT; goto errout_with_errno; } /* Initialize attributes for task_spawn(). */ ret = posix_spawnattr_init(&attr); if (ret != 0) { goto errout_with_errno; } ret = posix_spawn_file_actions_init(&file_actions); if (ret != 0) { goto errout_with_attrs; } /* Set the correct task size and priority */ param.sched_priority = builtin->priority; ret = posix_spawnattr_setschedparam(&attr, ¶m); if (ret != 0) { goto errout_with_actions; } ret = task_spawnattr_setstacksize(&attr, builtin->stacksize); if (ret != 0) { goto errout_with_actions; } /* If robin robin scheduling is enabled, then set the scheduling policy * of the new task to SCHED_RR before it has a chance to run. */ #if CONFIG_RR_INTERVAL > 0 ret = posix_spawnattr_setschedpolicy(&attr, SCHED_RR); if (ret != 0) { goto errout_with_actions; } ret = posix_spawnattr_setflags(&attr, POSIX_SPAWN_SETSCHEDPARAM | POSIX_SPAWN_SETSCHEDULER); if (ret != 0) { goto errout_with_actions; } #else ret = posix_spawnattr_setflags(&attr, POSIX_SPAWN_SETSCHEDPARAM); if (ret != 0) { goto errout_with_actions; } #endif /* Is output being redirected? */ if (redirfile) { /* Set up to close open redirfile and set to stdout (1) */ ret = posix_spawn_file_actions_addopen(&file_actions, 1, redirfile, oflags, 0644); if (ret != 0) { serr("ERROR: posix_spawn_file_actions_addopen failed: %d\n", ret); goto errout_with_actions; } } #ifdef CONFIG_LIBC_EXECFUNCS /* Load and execute the application. */ ret = posix_spawn(&pid, builtin->name, &file_actions, &attr, (argv) ? &argv[1] : (FAR char * const *)NULL, NULL); if (ret != 0 && builtin->main != NULL) #endif { /* Start the built-in */ ret = task_spawn(&pid, builtin->name, builtin->main, &file_actions, &attr, (argv) ? &argv[1] : (FAR char * const *)NULL, (FAR char * const *)NULL); } if (ret != 0) { serr("ERROR: task_spawn failed: %d\n", ret); goto errout_with_actions; } /* Free attributes and file actions. Ignoring return values in the case * of an error. */ /* Return the task ID of the new task if the task was successfully * started. Otherwise, ret will be ERROR (and the errno value will * be set appropriately). */ posix_spawn_file_actions_destroy(&file_actions); posix_spawnattr_destroy(&attr); return pid; errout_with_actions: posix_spawn_file_actions_destroy(&file_actions); errout_with_attrs: posix_spawnattr_destroy(&attr); errout_with_errno: errno = ret; return ERROR; }