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Diffstat (limited to 'nuttx/libc/spawn/lib_ps.c')
| -rw-r--r-- | nuttx/libc/spawn/lib_ps.c | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/nuttx/libc/spawn/lib_ps.c b/nuttx/libc/spawn/lib_ps.c new file mode 100644 index 000000000..e04ed77ad --- /dev/null +++ b/nuttx/libc/spawn/lib_ps.c @@ -0,0 +1,158 @@ +/**************************************************************************** + * libc/string/lib_ps.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> + +#include <spawn.h> + +/**************************************************************************** + * Global Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: posix_spawn + * + * Description: + * The posix_spawn() and posix_spawnp() functions will create a new, + * child task, constructed a regular executable file. + * + * Input Parameters: + * + * pid - Upon successful completion, posix_spawn() and posix_spawnp() will + * return the task ID of the child task to the parent task, in the + * variable pointed to by a non-NULL 'pid' argument. If the 'pid' + * argument is a null pointer, the process ID of the child is not + * returned to the caller. + * + * path - The 'path' argument to posix_spawn() is the absolute path that + * identifies the file to execute. The 'path' argument to posix_spawnp() + * may also be a relative path and will be used to construct a pathname + * that identifies the file to execute. In the case of a relative path, + * the path prefix for the file will be obtained by a search of the + * directories passed as the environment variable PATH. + * + * NOTE: NuttX provides only one implementation: If + * CONFIG_BINFMT_EXEPATH is defined, then only posix_spawnp() behavior + * is supported; otherwise, only posix_spawn behavior is supported. + * + * file_actions - If 'file_actions' is a null pointer, then file + * descriptors open in the calling process will remain open in the + * child process (unless CONFIG_FDCLONE_STDIO is defined). If + * 'file_actions' is not NULL, then the file descriptors open in the + * child process will be those open in the calling process as modified + * by the spawn file actions object pointed to by file_actions. + * + * attr - If the value of the 'attr' parameter is NULL, the all default + * values for the POSIX spawn attributes will be used. Otherwise, the + * attributes will be set according to the spawn flags. The + * posix_spawnattr_t spawn attributes object type is defined in spawn.h. + * It will contains these attributes, not all of which are supported by + * NuttX: + * + * - POSIX_SPAWN_SETPGROUP: Setting of the new tasks process group is + * not supported. NuttX does not support process groups. + * - POSIX_SPAWN_SETSCHEDPARAM: Set new tasks priority to the sched_param + * value. + * - POSIX_SPAWN_SETSCHEDULER: Set the new tasks scheduler priority to + * the sched_policy value. + * - POSIX_SPAWN_RESETIDS: Resetting of effective user ID of the child + * process is not supported. NuttX does not support effective user + * IDs. + * - POSIX_SPAWN_SETSIGMASK: Setting the initial signal mask of the new + * task is not supported. NuttX does support signal masks, but there + * is no mechanism in place now to do this. + * - POSIX_SPAWN_SETSIGDEF: Resetting signal default actions is not + * supported. NuttX does not support default signal actions. + * + * argv - argv[] is the argument list for the new task. argv[] is an + * array of pointers to null-terminated strings. The list is terminated + * with a null pointer. The value in argv[0] should point to a filename + * that is associated with the process image being started by the + * posix_spawn() or posix_spawnp() functions. + * + * envp - The envp[] argument is not used by NuttX and may be NULL. In + * standard implementations, envp[] is an array of character pointers to + * null-terminated strings that provide the environment for the new + * process image. The environment array is terminated by a null pointer. + * In NuttX, the envp[] argument is ignored and the new task will simply + * inherit the environment of the parent task. + * + * Returned Value: + * posix_spawn() and posix_spawnp() will return zero on success. + * Otherwise, an error number will be returned as the function return + * value to indicate the error: + * + * - EINVAL: The value specified by 'file_actions' or 'attr' is invalid. + * - Any errors that might have been return if vfork() and excec[l|v]() + * had been called. + * + * Assumptions/Limitations: + * - NuttX provides only posix_spawn() or posix_spawnp() behavior + * depending upon the setting of CONFIG_BINFMT_EXEPATH: If + * CONFIG_BINFMT_EXEPATH is defined, then only posix_spawnp() behavior + * is supported; otherwise, only posix_spawn behavior is supported. + * - The 'envp' argument is not used and the 'environ' variable is not + * altered (NuttX does not support the 'environ' variable. + * - Process groups are not supported (POSIX_SPAWN_SETPGROUP). + * - Effective user IDs are not supported (POSIX_SPAWN_RESETIDS). + * - Signal masks and signal default actions cannot be modified in the + * newly executed task (POSIX_SPAWN_SETSIGDEF and POSIX_SPAWN_SETSIGMASK). + * + * POSIX Compatibility + * - The value of the argv[0] received by the child task is assigned by + * NuttX. For the caller of posix_spawn(), the provided argv[0] will + * correspond to argv[1] received by the new task. + * + ****************************************************************************/ + +#ifdef CONFIG_BINFMT_EXEPATH +int posix_spawnp(FAR pid_t *pid, FAR const char *path, + FAR const posix_spawn_file_actions_t *file_actions, + FAR const posix_spawnattr_t *attr, + FAR char *const argv[], FAR char *const envp[]) +#else +int posix_spawn(FAR pid_t *pid, FAR const char *path, + FAR const posix_spawn_file_actions_t *file_actions, + FAR const posix_spawnattr_t *attr, + FAR char *const argv[], FAR char *const envp[]) +#endif +{ +#warning "Missing Logic" + return OK; +} |