pkexec [--version] [--disable-internal-agent] [--help]

       pkexec [--user username] PROGRAM [ARGUMENTS...]

       pkexec allows an authorized user to execute PROGRAM as another user. If
       username is not specified, then the program will be executed as the
       administrative super user, root.

       Upon successful completion, the return value is the return value of
       PROGRAM. If the calling process is not authorized or an authorization
       could not be obtained through authentication or an error occured,
       pkexec exits with a return value of 127. If the authorization could not
       be obtained because the user dismissed the authentication dialog,
       pkexec exits with a return value of 126.

       pkexec, like any other PolicyKit application, will use the
       authentication agent registered for the calling process. However, if no
       authentication agent is available, then pkexec will register its own
       textual authentication agent. This behavior can be turned off by
       passing the --disable-internal-agent option.

       Executing a program as another user is a privileged operation. By
       default the required authorization (See the section called "REQUIRED
       AUTHORIZATIONS") requires administrator authentication. In addition,
       the authentication dialog presented to the user will display the full
       path to the program to be executed so the user is aware of what will


               |                     Authenticate                     [X] |
               |                                                          |
               |  [Icon]  Authentication is needed to run `/bin/bash'     |
               |          as the super user                               |
               |                                                          |
               |          An application is attempting to perform an      |
               |          action that requires privileges. Authentication |
               |          as the super user is required to perform this   |
               |          action.                                         |
               |                                                          |
               |          Password for root: [_________________________]  |
               |                                                          |
               | [V] Details:                                             |
               |  Command: /bin/bash                                      |
               |  Run As:  Super User (root)                              |
               |  Action:  org.freedesktop.policykit.exec                 |

       org.freedesktop.policykit.exec.allow_gui annotation on an action is set
       to a nonempty value; this is discouraged, though, and should only be
       used for legacy programs.

       By default, the org.freedesktop.policykit.exec authorization is
       required unless an action definition file is present for the program in
       question. To require another authorization, it can be specified using
       the org.freedesktop.policykit.exec.path annotation on an action (See
       the section called "EXAMPLE" for details).

       To specify what kind of authorization is needed to execute the program
       /usr/bin/pk-example-frobnicate as another user, simply write an action
       definition file like this

           <?xml version="1.0" encoding="UTF-8"?>
           <!DOCTYPE policyconfig PUBLIC
            "-//freedesktop//DTD PolicyKit Policy Configuration 1.0//EN"

             <vendor>Examples for the PolicyKit Project</vendor>

             <action id="">
               <description>Run the PolicyKit example program Frobnicate</description>
               <description xml:lang="da">Kor PolicyKit eksemplet Frobnicate</description>
               <message>Authentication is required to run the PolicyKit example program Frobnicate (user=$(user), program=$(program), command_line=$(command_line))</message>
               <message xml:lang="da">Autorisering er pakraevet for at afvikle PolicyKit eksemplet Frobnicate (user=$(user), program=$(program), command_line=$(command_line))</message>
               <annotate key="org.freedesktop.policykit.exec.path">/usr/bin/pk-example-frobnicate</annotate>


       and drop it in the /usr/share/polkit-1/actions directory under a
       suitable name (e.g. matching the namespace of the action). Note that in
       addition to specifying the program, the authentication message,
       description, icon and defaults can be specified. Note that occurences
       of the strings $(user), $(program) and $(command_line) in the message
       will be replaced with respectively the user (of the form "Real Name
       (username)" or just "username" if there is no real name for the
       username), the binary to execute (a fully-qualified path, e.g.
       "/usr/bin/pk-example-frobnicate") and the command-line, e.g.
       "pk-example-frobnicate foo bar". For example, for the action defined
       above, the following authentication dialog will be shown:

               |          Password: [__________________________________]  |
               |                                                          |
               | [V] Details:                                             |
               |  Command: /usr/bin/pk-example-frobnicate                 |
               |  Run As:  Super User (root)                              |
               |  Action:        |
               |  Vendor:  Examples for the PolicyKit Project             |
               |                                                          |
               |                                  [Cancel] [Authenticate] |

       If the user is using the da_DK locale, the dialog looks like this:


               |                     Autorisering                     [X] |
               |                                                          |
               |  [Icon]  Autorisering er pakraevet for at afvikle         |
               |          PolicyKit eksemplet Frobnicate                  |
               |                                                          |
               |          Et program forsoger at udfore en handling der   |
               |          kraever privilegier. Autorisering er pakraevet.   |
               |                                                          |
               |          Kodeord: [___________________________________]  |
               |                                                          |
               | [V] Detaljer:                                            |
               |  Bruger:   Super User (root)                             |
               |  Program:  /usr/bin/pk-example-frobnicate                |
               |  Handling:       |
               |  Vendor:   Examples for the PolicyKit Project            |
               |                                                          |
               |                                [Annuller] [Autorisering] |

       Note that pkexec does no validation of the ARGUMENTS passed to PROGRAM.
       In the normal case (where administrator authentication is required
       every time pkexec is used), this is not a problem since if the user is
       an administrator he might as well just run pkexec bash to get root.

       However, if an action is used for which the user can retain
       authorization (or if the user is implicitly authorized), such as with
       pk-example-frobnicate above, this could be a security hole. Therefore,
       as a rule of thumb, programs for which the default required
       authorization is changed, should never implicitly trust user input
       (e.g. like any other well-written suid program).

       Written by David Zeuthen <> with a lot of help from
       many others.

       Please send bug reports to either the distribution or the polkit-devel
        3. /usr/share/gtk-doc/html/polkit-1/pkexec-frobnicate-da.png

polkit                             May 2009                          PKEXEC(1)
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