DOKK / manpages / debian 12 / libpam-modules-bin / pam_timestamp_check.8.en
PAM_TIMESTAMP_CHECK(8) Linux-PAM Manual PAM_TIMESTAMP_CHECK(8)

pam_timestamp_check - Check to see if the default timestamp is valid

pam_timestamp_check [-k] [-d] [target_user]

With no arguments pam_timestamp_check will check to see if the default timestamp is valid, or optionally remove it.

-k

Instead of checking the validity of a timestamp, remove it. This is analogous to sudo's -k option.

-d

Instead of returning validity using an exit status, loop indefinitely, polling regularly and printing the status on standard output.

target_user

By default pam_timestamp_check checks or removes timestamps generated by pam_timestamp when the user authenticates as herself. When the user authenticates as a different user, the name of the timestamp file changes to accommodate this. target_user allows one to specify this user name.

0

The timestamp is valid.

2

The binary is not setuid root.

3

Invalid invocation.

4

User is unknown.

5

Permissions error.

6

Invalid controlling tty.

7

Timestamp is not valid.

Users can get confused when they are not always asked for passwords when running a given program. Some users reflexively begin typing information before noticing that it is not being asked for.

auth sufficient pam_timestamp.so verbose
auth required   pam_unix.so
session required pam_unix.so
session optional pam_timestamp.so

/var/run/sudo/...

timestamp files and directories

pam_timestamp_check(8), pam.conf(5), pam.d(5), pam(7)

pam_timestamp was written by Nalin Dahyabhai.

09/03/2021 Linux-PAM Manual