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

System.Posix.User.ByteString

Contents

User environment
- Querying the user environment
  - The group database
  - The user database
- Modifying the user environment

Description

POSIX user/group support

Synopsis

getRealUserID :: IO UserID
getRealGroupID :: IO GroupID
getEffectiveUserID :: IO UserID
getEffectiveGroupID :: IO GroupID
getGroups :: IO [GroupID]
getLoginName :: IO ByteString
getEffectiveUserName :: IO ByteString
dataGroupEntry = GroupEntry {
- groupName :: ByteString
- groupPassword :: ByteString
- groupID :: GroupID
- groupMembers :: [ByteString]
}
getGroupEntryForID :: GroupID -> IO GroupEntry
getGroupEntryForName :: ByteString -> IO GroupEntry
getAllGroupEntries :: IO [GroupEntry]
dataUserEntry = UserEntry {
- userName :: ByteString
- userPassword :: ByteString
- userID :: UserID
- userGroupID :: GroupID
- userGecos :: ByteString
- homeDirectory :: ByteString
- userShell :: ByteString
}
getUserEntryForID :: UserID -> IO UserEntry
getUserEntryForName :: ByteString -> IO UserEntry
getAllUserEntries :: IO [UserEntry]
setUserID :: UserID -> IO ()
setGroupID :: GroupID -> IO ()
setEffectiveUserID :: UserID -> IO ()
setEffectiveGroupID :: GroupID -> IO ()
setGroups :: [GroupID] -> IO ()

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 ByteString Source #

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

getEffectiveUserName :: IO ByteString Source #

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

The group database

dataGroupEntry Source #

Constructors

GroupEntry
Fields groupName :: ByteString The name of this group (gr_name) groupPassword :: ByteString The password for this group (gr_passwd) groupID :: GroupID The unique numeric ID for this group (gr_gid) groupMembers :: [ByteString] A list of zero or more usernames that are members (gr_mem)

Instances

Instances details

Read GroupEntrySource #
Instance details Defined in System.Posix.User.Common Methods readsPrec :: Int -> ReadS GroupEntry # readList :: ReadS [GroupEntry] # readPrec :: ReadPrec GroupEntry # readListPrec :: ReadPrec [GroupEntry] #
Show GroupEntrySource #
Instance details Defined in System.Posix.User.Common Methods showsPrec :: Int -> GroupEntry -> ShowS # show :: GroupEntry -> String # showList :: [GroupEntry] -> ShowS #
Eq GroupEntrySource #
Instance details Defined in System.Posix.User.Common Methods (==) :: GroupEntry -> GroupEntry -> Bool # (/=) :: GroupEntry -> GroupEntry -> Bool #

getGroupEntryForID :: GroupID -> IO GroupEntry Source #

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

getGroupEntryForName :: ByteString -> 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

dataUserEntry Source #

Constructors

UserEntry

Fields

userName :: ByteString
Textual name of this user (pw_name)
userPassword :: ByteString
Password -- may be empty or fake if shadow is in use (pw_passwd)
userID :: UserID
Numeric ID for this user (pw_uid)
userGroupID :: GroupID
Primary group ID (pw_gid)
userGecos :: ByteString
Usually the real name for the user (pw_gecos)
homeDirectory :: ByteString
Home directory (pw_dir)
userShell :: ByteString
Default shell (pw_shell)

Instances

Instances details

Read UserEntrySource #
Instance details Defined in System.Posix.User.Common Methods readsPrec :: Int -> ReadS UserEntry # readList :: ReadS [UserEntry] # readPrec :: ReadPrec UserEntry # readListPrec :: ReadPrec [UserEntry] #
Show UserEntrySource #
Instance details Defined in System.Posix.User.Common Methods showsPrec :: Int -> UserEntry -> ShowS # show :: UserEntry -> String # showList :: [UserEntry] -> ShowS #
Eq UserEntrySource #
Instance details Defined in System.Posix.User.Common Methods (==) :: UserEntry -> UserEntry -> Bool # (/=) :: UserEntry -> UserEntry -> Bool #

getUserEntryForID :: UserID -> IO UserEntry Source #

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

getUserEntryForName :: ByteString -> 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.