call_usermodehelper(9) [centos man page]

CALL_USERMODEHELPER(9)						  Module Support					    CALL_USERMODEHELPER(9)

NAME

       call_usermodehelper - prepare and start a usermode application

SYNOPSIS

       int call_usermodehelper(char * path, char ** argv, char ** envp, int wait);

ARGUMENTS

       path
	   path to usermode executable

       argv
	   arg vector for process

       envp
	   environment for process

       wait
	   wait for the application to finish and return status. when UMH_NO_WAIT don't wait at all, but you get no useful error back when the
	   program couldn't be exec'ed. This makes it safe to call from interrupt context.

DESCRIPTION

       This function is the equivalent to use call_usermodehelper_setup and call_usermodehelper_exec.

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)