SYNOPSIS

pkcheck [--version] [--help]

pkcheck [--list-temp]

pkcheck [--revoke-temp]

pkcheck --action-id action {--process { pid | pid,pid-start-time | pid,pid-start-time,uid } | --system-bus-name busname} [--allow-user-interaction] [--enable-internal-agent] [--detail key value...]

DESCRIPTION

pkcheck

RETURN VALUE

If the specified process is authorized, pkcheck exits with a return value of 0. If the authorization result contains any details, these are printed on standard output as key/value pairs using environment style reporting, e.g. first the key followed by a an equal sign, then the value followed by a newline.

KEY1=VALUE1
KEY2=VALUE2
KEY3=VALUE3
...

Octects that are not in [a-zA-Z0-9_] are escaped using octal codes prefixed with \. For example, the UTF-8 string føl,你好 will be printed as f\303\270l\54\344\275\240\345\245\275.

If the specificied process is not authorized, pkcheck exits with a return value of 1 and a diagnostic message is printed on standard error. Details are printed on standard output.

If the specificied process is not authorized because no suitable authentication agent is available or if the --allow-user-interaction wasn't passed, pkcheck exits with a return value of 2 and a diagnostic message is printed on standard error. Details are printed on standard output.

If the specificied process is not authorized because the authentication dialog / request was dismissed by the user, pkcheck exits with a return value of 3 and a diagnostic message is printed on standard error. Details are printed on standard output.

If an error occured while checking for authorization, pkcheck exits with a return value of 127 with a diagnostic message printed on standard error.

If one or more of the options passed are malformed, pkcheck exits with a return value of 126. If stdin is a tty, then this manual page is also shown.

NOTES

Do not use either the bare pid or pid,start-time syntax forms for --process. There are race conditions in both. New code should always use pid,pid-start-time,uid. The value of start-time can be determined by consulting e.g. the proc(5) file system depending on the operating system. If fewer than 3 arguments are passed, pkcheck will attempt to look up them up internally, but note that this may be racy.

If your program is a daemon with e.g. a custom Unix domain socket, you should determine the uid parameter via operating system mechanisms such as PEERCRED.

AUTHENTICATION AGENT

pkcheck, like any other PolicyKit application, will use the authentication agent registered for the process in question. However, if no authentication agent is available, then pkcheck can register its own textual authentication agent if the option --enable-internal-agent is passed.

AUTHOR

Written by David Zeuthen <[email protected]> with a lot of help from many others.