call_usermodehelper_setup(9) [centos man page]

CALL_USERMODEHELPER_(9) 					  Module Support					   CALL_USERMODEHELPER_(9)

NAME

       call_usermodehelper_setup - prepare to call a usermode helper

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);

ARGUMENTS

       path
	   path 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

Kernel Hackers Manual 3.10					     June 2014						   CALL_USERMODEHELPER_(9)

isaexec(3C)						   Standard C Library Functions 					       isaexec(3C)

NAME

       isaexec - invoke isa-specific executable

SYNOPSIS

       #include <unistd.h>

       int isaexec(const char *path, char *const argv[], char *const envp[]);

DESCRIPTION

       The isaexec() function takes the path specified as path and breaks it into directory and file name components. It enquires from the running
       system the list of supported instruction set architectures; see isalist(5). The function traverses the list for an executable file in named
       subdirectories of the original directory.  When such a file is located, execve() is invoked with argv[] and envp[]. See exec(2).

RETURN VALUES

       If no file is located, isaexec() returns ENOENT. Other return values are the same as for execve().

EXAMPLES

       Example 1 Example of isaexec() function.

       On a system whose isalist is

	 sparcv7 sparc

       the program

	 int
	 main(int argc, char *argv[], char *envp[])
	 {
		 return (isaexec("/bin/thing", argv, envp));
	 }

       will  look  first  for  an  executable  file  named  /bin/sparcv7/thing, then for an executable file named /bin/sparc/thing. It will invoke
       execve() on the first executable file it finds named thing.

       On that same system, a program called /u/bin/tofu can cause either /u/bin/sparcv7/tofu or /u/bin/sparc/tofu to be invoked using the follow-
       ing code:

	 int
	 main(int argc, char *argv[], char *envp[])
	 {
		       return (isaexec(getexecname(), argv, envp));
	 }

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Safe			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Stable			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       exec(2), getexecname(3C), attributes(5), isalist(5)

SunOS 5.11							    20 Mar 1998 						       isaexec(3C)