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CALL_USERMODEHELPER_(9) | Module Support | CALL_USERMODEHELPER_(9) |
NAME¶
call_usermodehelper_setup - prepare to call a usermode helperSYNOPSIS¶
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);
ARGUMENTS¶
pathpath to usermode executable
argv
arg vector for process
envp
environment for process
gfp_mask
gfp mask for memory allocation
init
an init function
cleanup
a cleanup function
data
arbitrary context sensitive data
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.COPYRIGHT¶
January 2017 | Kernel Hackers Manual 4.8. |