Safe Haskell	Safe-Inferred
Language	Haskell2010

System.PosixCompat.User

Contents

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

Description

This module makes the operations exported by System.Posix.User available on all platforms. On POSIX systems it re-exports operations from System.Posix.User. On other platforms it provides dummy implementations.

Synopsis

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

User environment

Querying the user environment

getRealUserID :: IO UserID #

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

getRealGroupID :: IO GroupID #

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

getEffectiveUserID :: IO UserID #

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

getEffectiveGroupID :: IO GroupID #

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

getGroups :: IO [GroupID] #

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

getLoginName :: IO String #

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

getEffectiveUserName :: IO String #

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

The group database

data GroupEntry #

Constructors

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

Instances

Instances details

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

getGroupEntryForID :: GroupID -> IO GroupEntry #

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 #

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] #

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

The user database

data UserEntry #

Constructors

UserEntry

Fields

userName :: String
Textual name of this user (pw_name)
userPassword :: String
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 :: String
Usually the real name for the user (pw_gecos)
homeDirectory :: String
Home directory (pw_dir)
userShell :: String
Default shell (pw_shell)

Instances

Instances details

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

getUserEntryForID :: UserID -> IO UserEntry #

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 #

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] #

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

Modifying the user environment

setUserID :: UserID -> IO () #

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

setGroupID :: GroupID -> IO () #

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