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187 lines
6.6 KiB
187 lines
6.6 KiB
/**************************************************************************** |
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* apps/nshlib/nsh_apps.c |
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* |
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* Copyright (C) 2011-2012 Gregory Nutt. All rights reserved. |
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* Copyright (C) 2011 Uros Platise. All rights reserved. |
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* Author: Uros Platise <uros.platise@isotel.eu> |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* 3. Neither the name NuttX nor the names of its contributors may be |
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* used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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* |
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****************************************************************************/ |
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/**************************************************************************** |
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* Included Files |
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****************************************************************************/ |
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#include <nuttx/config.h> |
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#ifdef CONFIG_SCHED_WAITPID |
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# include <sys/wait.h> |
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#endif |
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#include <stdbool.h> |
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#include <errno.h> |
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#include <string.h> |
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#include <apps/apps.h> |
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#include "nsh.h" |
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#include "nsh_console.h" |
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#ifdef CONFIG_NSH_BUILTIN_APPS |
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/**************************************************************************** |
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* Definitions |
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****************************************************************************/ |
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/**************************************************************************** |
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* Private Types |
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****************************************************************************/ |
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/**************************************************************************** |
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* Private Function Prototypes |
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****************************************************************************/ |
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/**************************************************************************** |
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* Private Data |
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****************************************************************************/ |
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/**************************************************************************** |
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* Public Data |
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****************************************************************************/ |
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/**************************************************************************** |
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* Private Functions |
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****************************************************************************/ |
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/**************************************************************************** |
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* Public Functions |
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****************************************************************************/ |
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/**************************************************************************** |
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* Name: nsh_execapp |
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* |
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* Description: |
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* Attempt to execute the application task whose name is 'cmd' |
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* |
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* Returned Value: |
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* <0 If exec_namedapp() fails, then the negated errno value |
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* is returned. |
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* -1 (ERROR) if the application task corresponding to 'cmd' could not |
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* be started (possibly because it doesn not exist). |
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* 0 (OK) if the application task corresponding to 'cmd' was |
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* and successfully started. If CONFIG_SCHED_WAITPID is |
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* defined, this return value also indicates that the |
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* application returned successful status (EXIT_SUCCESS) |
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* 1 If CONFIG_SCHED_WAITPID is defined, then this return value |
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* indicates that the application task was spawned successfully |
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* but returned failure exit status. |
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* |
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****************************************************************************/ |
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int nsh_execapp(FAR struct nsh_vtbl_s *vtbl, FAR const char *cmd, |
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FAR char **argv) |
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{ |
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int ret = OK; |
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/* Lock the scheduler to prevent the application from running until the |
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* waitpid() has been called. |
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*/ |
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sched_lock(); |
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/* Try to find and execute the command within the list of builtin |
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* applications. |
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*/ |
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ret = exec_namedapp(cmd, (FAR const char **)argv); |
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if (ret >= 0) |
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{ |
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/* The application was successfully started (but still blocked because the |
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* scheduler is locked). If the application was not backgrounded, then we |
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* need to wait here for the application to exit. |
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*/ |
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#ifdef CONFIG_SCHED_WAITPID |
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if (vtbl->np.np_bg == false) |
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{ |
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int rc = 0; |
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/* Wait for the application to exit. Since we have locked the |
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* scheduler above, we know that the application has not yet |
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* started and there is no possibility that it has already exited. |
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* The scheduler will be unlocked while waitpid is waiting and the |
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* application will be able to run. |
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*/ |
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ret = waitpid(ret, &rc, 0); |
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if (ret >= 0) |
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{ |
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/* We can't return the exact status (nsh has nowhere to put it) |
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* so just pass back zero/nonzero in a fashion that doesn't look |
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* like an error. |
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*/ |
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ret = (rc == 0) ? OK : 1; |
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/* TODO: Set the environment variable '?' to a string corresponding |
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* to WEXITSTATUS(rc) so that $? will expand to the exit status of |
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* the most recently executed task. |
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*/ |
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} |
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} |
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else |
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#endif |
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{ |
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struct sched_param param; |
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sched_getparam(0, ¶m); |
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nsh_output(vtbl, "%s [%d:%d]\n", cmd, ret, param.sched_priority); |
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/* Backgrounded commands always 'succeed' as long as we can start |
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* them. |
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*/ |
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ret = OK; |
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} |
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} |
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sched_unlock(); |
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/* If exec_namedapp() or waitpid() failed, then return the negated errno |
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* value. |
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*/ |
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if (ret < 0) |
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{ |
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return -errno; |
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} |
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return ret; |
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} |
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#endif /* CONFIG_NSH_BUILTIN_APPS */
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