modpath(2)

modpath -- change loadable kernel modules search path

Synopsis

   #include <sys/mod.h>
   
   int modpath(const char *pathname);

Description

modpath allows processes with privilege P_LOADMOD to modify the global search path used to locate object files for loadable kernel modules on disk. The search path modifications take effect immediately and affect all subsequent loads and all users on the system. Affected loads include all auto-loads performed by the kernel auto-load mechanism and all demand-loads performed by modload(2) using a module name.

pathname can specify a colon-separated list of absolute pathnames, or an absolute pathname, or NULL.

If pathname specifies a pathname, the named directories:

will be searched prior to searching any directories specified by previous calls to modpath
will be searched prior to searching the default loadable modules search path, which is always searched and always searched last
do not have to exist on the system at the time modpath is called
do not have to exist on the system at the time the load takes place

If pathname is equal to NULL, the loadable modules search path is reset to its default value /etc/conf/mod.d.

Return values

On success, modpath returns 0. On failure, modpath returns -1 and sets errno to identify the error.

Errors

In the following conditions, modpath fails and sets errno to:

EINVAL: List of directories specified by pathname is malformed.
EPERM: The caller does not possess P_LOADMOD privileges.
ENAMETOOLONG: pathname is more than MAXPATHLEN characters long.
ENOSYS: Unable to perform the requested operation because the loadable modules functions are not configured into the system.

References

modadmin(1M), modload(2)