diff options
Diffstat (limited to 'apps/nshlib/nsh_fileapps.c')
| -rw-r--r-- | apps/nshlib/nsh_fileapps.c | 314 |
1 files changed, 0 insertions, 314 deletions
diff --git a/apps/nshlib/nsh_fileapps.c b/apps/nshlib/nsh_fileapps.c deleted file mode 100644 index 9ff230f1a..000000000 --- a/apps/nshlib/nsh_fileapps.c +++ /dev/null @@ -1,314 +0,0 @@ -/**************************************************************************** - * apps/nshlib/nsh_fileapps.c - * - * Copyright (C) 2013 Gregory Nutt. All rights reserved. - * Author: Gregory Nutt <gnutt@nuttx.org> - * - * 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 <nuttx/config.h> - -#ifdef CONFIG_SCHED_WAITPID -# include <sys/wait.h> -#endif - -#include <stdbool.h> -#include <spawn.h> -#include <errno.h> -#include <string.h> - -#include "nsh.h" -#include "nsh_console.h" - -#ifdef CONFIG_NSH_FILE_APPS - -/**************************************************************************** - * Definitions - ****************************************************************************/ - -/**************************************************************************** - * Private Types - ****************************************************************************/ - -/**************************************************************************** - * Private Function Prototypes - ****************************************************************************/ - -/**************************************************************************** - * Private Data - ****************************************************************************/ - -/**************************************************************************** - * Public Data - ****************************************************************************/ - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: nsh_fileapp - * - * Description: - * Attempt to execute the application task whose name is 'cmd' - * - * Returned Value: - * <0 If exec_builtin() fails, then the negated errno value - * is returned. - * -1 (ERROR) if the application task corresponding to 'cmd' could not - * be started (possibly because it doesn not exist). - * 0 (OK) if the application task corresponding to 'cmd' was - * and successfully started. If CONFIG_SCHED_WAITPID is - * defined, this return value also indicates that the - * application returned successful status (EXIT_SUCCESS) - * 1 If CONFIG_SCHED_WAITPID is defined, then this return value - * indicates that the application task was spawned successfully - * but returned failure exit status. - * - ****************************************************************************/ - -int nsh_fileapp(FAR struct nsh_vtbl_s *vtbl, FAR const char *cmd, - FAR char **argv, FAR const char *redirfile, int oflags) -{ - posix_spawn_file_actions_t file_actions; - posix_spawnattr_t attr; - pid_t pid; - int ret; - - /* Initialize the attributes file actions structure */ - - ret = posix_spawn_file_actions_init(&file_actions); - if (ret != 0) - { - /* posix_spawn_file_actions_init returns a positive errno value on - * failure. - */ - - nsh_output(vtbl, g_fmtcmdfailed, cmd, "posix_spawn_file_actions_init", - NSH_ERRNO_OF(ret)); - goto errout; - } - - ret = posix_spawnattr_init(&attr); - if (ret != 0) - { - /* posix_spawnattr_init returns a positive errno value on failure. */ - - nsh_output(vtbl, g_fmtcmdfailed, cmd, "posix_spawnattr_init", - NSH_ERRNO); - goto errout_with_actions; - } - - /* Handle re-direction of output */ - - if (redirfile) - { - ret = posix_spawn_file_actions_addopen(&file_actions, 1, redirfile, - oflags, 0644); - if (ret != 0) - { - /* posix_spawn_file_actions_addopen returns a positive errno - * value on failure. - */ - - nsh_output(vtbl, g_fmtcmdfailed, cmd, - "posix_spawn_file_actions_addopen", - NSH_ERRNO); - goto errout_with_attrs; - } - } - - /* Lock the scheduler in an attempt to prevent the application from - * running until waitpid() has been called. - */ - - sched_lock(); - - /* Execute the program. posix_spawnp returns a positive errno value on - * failure. - */ - - ret = posix_spawnp(&pid, cmd, &file_actions, &attr, &argv[1], NULL); - if (ret == OK) - { - /* The application was successfully started with pre-emption disabled. - * In the simplest cases, the application will not have run because the - * the scheduler is locked. But in the case where I/O was redirected, a - * proxy task ran and broke our lock. As result, the application may - * have aso ran if its priority was higher than than the priority of - * this thread. - * - * If the application did not run to completion and if the application - * was not backgrounded, then we need to wait here for the application - * to exit. This only works works with the following options: - * - * - CONFIG_NSH_DISABLEBG - Do not run commands in background - * - CONFIG_SCHED_WAITPID - Required to run external commands in - * foreground - */ - -#ifdef CONFIG_SCHED_WAITPID - - /* CONFIG_SCHED_WAITPID is selected, so we may run the command in - * foreground unless we were specifically requested to run the command - * in background (and running commands in background is enabled). - */ - -# ifndef CONFIG_NSH_DISABLEBG - if (vtbl->np.np_bg == false) -# endif /* CONFIG_NSH_DISABLEBG */ - { - int rc = 0; - - /* Wait for the application to exit. We did lock the scheduler - * above, but that does not guarantee that the application did not - * already run to completion in the case where I/O was redirected. - * Here the scheduler will be unlocked while waitpid is waiting - * and if the application has not yet run, it will now be able to - * do so. - */ - - ret = waitpid(pid, &rc, 0); - if (ret < 0) - { - /* If the child thread does not exist, waitpid() will return - * the error ECHLD. Since we know that the task was successfully - * started, this must be one of the cases described above; we - * have to assume that the task already exit'ed. In this case, - * we have no idea if the application ran successfully or not - * (because NuttX does not retain exit status of child tasks). - * Let's assume that is did run successfully. - */ - - int errcode = errno; - if (errcode == ECHILD) - { - ret = OK; - } - else - { - nsh_output(vtbl, g_fmtcmdfailed, cmd, "waitpid", - NSH_ERRNO_OF(errcode)); - } - } - - /* Waitpid completed the wait successfully */ - - else - { - /* We can't return the exact status (nsh has nowhere to put it) - * so just pass back zero/nonzero in a fashion that doesn't look - * like an error. - */ - - ret = (rc == 0) ? OK : 1; - - /* TODO: Set the environment variable '?' to a string corresponding - * to WEXITSTATUS(rc) so that $? will expand to the exit status of - * the most recently executed task. - */ - } - } -# ifndef CONFIG_NSH_DISABLEBG - else -# endif /* CONFIG_NSH_DISABLEBG */ -#endif /* CONFIG_SCHED_WAITPID */ - - /* We get here if either: - * - * - CONFIG_SCHED_WAITPID is not selected meaning that all commands - * have to be run in background, or - * - CONFIG_SCHED_WAITPID and CONFIG_NSH_DISABLEBG are both selected, but the - * user requested to run the command in background. - * - * NOTE that the case of a) CONFIG_SCHED_WAITPID is not selected and - * b) CONFIG_NSH_DISABLEBG selected cannot be supported. In that event, all - * commands will have to run in background. The waitpid() API must be - * available to support running the command in foreground. - */ - -#if !defined(CONFIG_SCHED_WAITPID) || !defined(CONFIG_NSH_DISABLEBG) - { - struct sched_param param; - sched_getparam(ret, ¶m); - nsh_output(vtbl, "%s [%d:%d]\n", cmd, ret, param.sched_priority); - - /* Backgrounded commands always 'succeed' as long as we can start - * them. - */ - - ret = OK; - } -#endif /* !CONFIG_SCHED_WAITPID || !CONFIG_NSH_DISABLEBG */ - } - - sched_unlock(); - - /* Free attibutes and file actions. Ignoring return values in the case - * of an error. - */ - -errout_with_actions: - (void)posix_spawn_file_actions_destroy(&file_actions); - -errout_with_attrs: - (void)posix_spawnattr_destroy(&attr); - -errout: - /* Most posix_spawn interfaces return a positive errno value on failure - * and do not set the errno variable. - */ - - if (ret > 0) - { - /* Set the errno value and return -1 */ - - set_errno(ret); - ret = ERROR; - } - else if (ret < 0) - { - /* Return -1 on failure. errno should have been set. */ - - ret = ERROR; - } - - return ret; -} - -#endif /* CONFIG_NSH_FILE_APPS */ |