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HP-UX 11i Version 3: February 2007

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modpath — change global search path for dynamically loadable kernel modules


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


modpath allows processes with appropriate privilege to modify the global search path used to locate object files for dynamically loadable kernel modules. The search path modifications take effect immediately and affect all subsequent loads for all users on the system.

pathname may be either a colon-separated list of absolute path names or NULL. If the former, these path names represent directories which should be searched for all autoloads of loadable kernel modules and for demand loads (see modload(2)) where the module is given by a simple file name. This list of directories will be prepended to the existing list of directories and so will be searched before any directories given in previous calls to modpath and before the default location which is always searched last. The directories do not have to exist on the system at the time modpath is called, or when a load actually takes place. If pathname is equal to NULL, the global search path is set back to its initial default value, /usr/conf/mod.


modpath is currently implemented as a macro. Module search path is not persistent across boots.

Security Restrictions

modpath is restricted to superuser processes or privileged processes. A privileged process requires the PRIV_DLKM privilege to execute the modpath system call.

See privileges(5) for more information about the DLKM_PRIV privilege.


On success, modpath returns 0, otherwise it returns -1 and sets errno to indicate the error.


modpath fails if one or more of the following are true:


The list of directories specified by pathname is malformed.


The Dynamically Loadable Kernel Module feature is not initialized.


pathname is more than MAXPATHLEN characters long.


The caller is not a superuser process or a privileged process.

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