Copyright	(c) The University of Glasgow 2002
License	BSD-style (see the file libraries/base/LICENSE)
Maintainer	[email protected]
Stability	provisional
Portability	non-portable (requires POSIX)
Safe Haskell	Trustworthy
Language	Haskell2010

User environment

Querying the user environment

getRealUserID :: IO UserID Source

getRealUserID calls getuid to obtain the real UserID associated with the current process.

getRealGroupID :: IO GroupID Source

getRealGroupID calls getgid to obtain the real GroupID associated with the current process.

getEffectiveUserID :: IO UserID Source

getEffectiveUserID calls geteuid to obtain the effective UserID associated with the current process.

getEffectiveGroupID :: IO GroupID Source

getEffectiveGroupID calls getegid to obtain the effective GroupID associated with the current process.

getGroups :: IO [GroupID] Source

getGroups calls getgroups to obtain the list of supplementary GroupIDs associated with the current process.

getLoginName :: IO String Source

getLoginName calls getlogin to obtain the login name associated with the current process.

getEffectiveUserName :: IO String Source

getEffectiveUserName gets the name associated with the effective UserID of the process.

The group database

data GroupEntry Source

getGroupEntryForID :: GroupID -> IO GroupEntry Source

getGroupEntryForID gid calls getgrgid_r to obtain the GroupEntry information associated with GroupID gid. This operation may fail with isDoesNotExistError if no such group exists.

getGroupEntryForName :: String -> IO GroupEntry Source

getGroupEntryForName name calls getgrnam_r to obtain the GroupEntry information associated with the group called name. This operation may fail with isDoesNotExistError if no such group exists.

getAllGroupEntries :: IO [GroupEntry] Source

getAllGroupEntries returns all group entries on the system by repeatedly calling getgrent

The user database

data UserEntry Source

getUserEntryForID :: UserID -> IO UserEntry Source

getUserEntryForID gid calls getpwuid_r to obtain the UserEntry information associated with UserID uid. This operation may fail with isDoesNotExistError if no such user exists.

getUserEntryForName :: String -> IO UserEntry Source

getUserEntryForName name calls getpwnam_r to obtain the UserEntry information associated with the user login name. This operation may fail with isDoesNotExistError if no such user exists.

getAllUserEntries :: IO [UserEntry] Source

getAllUserEntries returns all user entries on the system by repeatedly calling getpwent

Modifying the user environment

setUserID :: UserID -> IO () Source

setUserID uid calls setuid to set the real, effective, and saved set-user-id associated with the current process to uid.

setGroupID :: GroupID -> IO () Source

setGroupID gid calls setgid to set the real, effective, and saved set-group-id associated with the current process to gid.

setEffectiveUserID :: UserID -> IO () Source

setEffectiveUserID uid calls seteuid to set the effective user-id associated with the current process to uid. This does not update the real user-id or set-user-id.

setEffectiveGroupID :: GroupID -> IO () Source

setEffectiveGroupID uid calls setegid to set the effective group-id associated with the current process to gid. This does not update the real group-id or set-group-id.

setGroups :: [GroupID] -> IO () Source

setGroups calls setgroups to set the list of supplementary GroupIDs associated with the current process.