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pam_exec -- PAM module which calls an external command
--------------------------------------------------------------------------
DESCRIPTION
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.
OPTIONS
debug
Print debug information.
expose_authtok
During authentication the calling command can read the password
from stdin(3). Only first PAM_MAX_RESP_SIZE bytes of a password
are provided to the command.
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.
The log option 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.
EXAMPLES
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.
AUTHOR
pam_exec was written by Thorsten Kukuk <kukuk@thkukuk.de> and Josh
Triplett <josh@joshtriplett.org>.