call_usermodehelper_setup - prepare to call a usermode helper
2. SYNOPSIS ▲
struct subprocess_info * call_usermodehelper_setup(char * path , char ** argv , char ** envp , gfp_t gfp_mask , int (* init ) (struct subprocess_info *info, struct cred *new), void (* cleanup ) (struct subprocess_info *info), void * data );
3. ARGUMENTS ▲
path to usermode executable
arg vector for process
environment for process
gfp mask for memory allocation
an init function
a cleanup function
arbitrary context sensitive data
4. DESCRIPTION ▲
Returns either NULL on allocation failure, or a subprocess_info structure. This should be passed to call_usermodehelper_exec to exec the process and free the structure.
The init function is used to customize the helper process prior to exec. A non-zero return code causes the process to error out, exit, and return the failure to the calling process
The cleanup function is just before ethe subprocess_info is about to be freed. This can be used for freeing the argv and envp. The Function must be runnable in either a process context or the context in which call_usermodehelper_exec is called.
5. COPYRIGHT ▲