pam_exec.so [
debug
] [
expose_authtok
] [
seteuid
] [
quiet
] [
stdout
] [
log=file
] [
type=type
]
command
[
...
]
pam_exec is a PAM module that can be used to run an external command.
The child's environment is set to the current PAM environment list, as
returned by
pam_getenvlist(3)
In addition, the following PAM items are
exported as environment variables: PAM_RHOST,
PAM_RUSER, PAM_SERVICE,
PAM_TTY, PAM_USER and
PAM_TYPE, which contains one of the module
types: account, auth,
password, open_session and
close_session.
Commands called by pam_exec need to be aware of that the user can have controll over the environment.
-
debug Print debug information.
-
expose_authtok During authentication the calling command can read the password from stdin(3).
-
log=file The output of the command is appended to
file-
type=type Only run the command if the module type matches the given type.
-
stdout Per default the output of the executed command is written to
/dev/null. With this option, the stdout output of the executed command is redirected to the calling application. It's in the responsibility of this application what happens with the output. Thelogoption is ignored.-
quiet Per default pam_exec.so will echo the exit status of the external command if it fails. Specifying this option will suppress the message.
-
seteuid Per default pam_exec.so will execute the external command with the real user ID of the calling process. Specifying this option means the command is run with the effective user ID.
- PAM_SUCCESS
The external command was run successfully.
- PAM_SERVICE_ERR
No argument or a wrong number of arguments were given.
- PAM_SYSTEM_ERR
A system error occurred or the command to execute failed.
- PAM_IGNORE
pam_setcredwas called, which does not execute the command. Or, the value given for the type= parameter did not match the module type.
Add the following line to /etc/pam.d/passwd to
rebuild the NIS database after each local password change:
password optional pam_exec.so seteuid /usr/bin/make -C /var/yp
This will execute the command
make -C /var/yp
with effective user ID.