PRIV_CUSTOM(3) Subroutines PRIV_CUSTOM(3)NAME
priv_register_{info,cap}_fn, priv_invoke_{info,cap}_fn - register and
invoke custom privileged methods.
SYNOPSIS
#include <privman.h>
int priv_register_info_fn(char *(*fnptr)(char * const *));
int priv_register_cap_fn(int (*fnptr)(char * const *));
char *priv_invoke_info_fn(int handle, char * const args[]);
int priv_invoke_cap_fn(int handle, char * const args[]);
DESCRIPTION
These methods allow you to register functions to be executed inside the
Privman server. The info functions return a string, the capability
functions return a file descriptor.
The register functions only work before priv_init(3) is invoked. They
return an integer handle to identify the registered function. The han‐
dle is then passed into the invoke functions after priv_init(3) s
invoked to cause the registered function to be invoked inside the con‐
text of the Privman server.
RETURN VALUE
On success, a handle is returned. On error, -1 is returned and errno
is set appropriately.
ERRORS
If one of the register functions is called after priv_init(3) is
invoked, errno will be EPERM.
If an invalid handle is passed to either of the invoke functions,
either -1 or NULL will be returned, and errno will be set to ENOENT.
If the registered function returns -1 or NULL, errno will be set to the
value of errno after the registered function was executed.
BUGS
There is currently no configuration option to allow setting custom
methods. While the fork(2) that happens in priv_init(3) will protect
the Privman servers function map from modification, any poorly written
methods can trash the servers state. Write your custom methods care‐
fully.
AUTHOR
Network Associates. Send email to <privman@nailabs.com>
SEE ALSOpriv_daemon(3)priv_execve(3)priv_fopen(3)priv_fork(3)priv_wait4(3)priv_init(3)privman_conf(5)priv_open(3)priv_pam(3)priv_rerunas(3)priv_rerespawn_as(3)privman(7)Unix OCTOBER 2002 PRIV_CUSTOM(3)
