Z-IO-0.6.4.0: Simple and high performance IO toolkit for Haskell

Copyright	(c) Dong Han 2020
License	BSD
Maintainer	winterland1989@gmail.com
Stability	experimental
Portability	non-portable
Safe Haskell	None
Language	Haskell2010

Z.IO.Environment

Contents

arguments
environment variables
other environment infos

Description

This module provide methods for retrieving various environment infomation. There's no encoding guarantee about these information, if you want textual representation, UTF8 assumption is recommended. i.e. use validate.

Synopsis

getArgs :: IO [CBytes]
getAllEnv :: HasCallStack => IO [(CBytes, CBytes)]
getEnv :: HasCallStack => CBytes -> IO (Maybe CBytes)
getEnv' :: HasCallStack => CBytes -> IO CBytes
setEnv :: HasCallStack => CBytes -> CBytes -> IO ()
unsetEnv :: HasCallStack => CBytes -> IO ()
getCWD :: HasCallStack => IO CBytes
chDir :: HasCallStack => CBytes -> IO ()
getHomeDir :: HasCallStack => IO CBytes
getTempDir :: HasCallStack => IO CBytes
getRandom :: Int -> IO Bytes
getRandomT :: Int -> IO Bytes
getResUsage :: HasCallStack => IO ResUsage
data ResUsage = ResUsage {
- ru_utime :: !TimeVal
- ru_stime :: !TimeVal
- ru_maxrss :: !Word64
- ru_ixrss :: !Word64
- ru_idrss :: !Word64
- ru_isrss :: !Word64
- ru_minflt :: !Word64
- ru_majflt :: !Word64
- ru_nswap :: !Word64
- ru_inblock :: !Word64
- ru_oublock :: !Word64
- ru_msgsnd :: !Word64
- ru_msgrcv :: !Word64
- ru_nsignals :: !Word64
- ru_nvcsw :: !Word64
- ru_nivcsw :: !Word64
}
data TimeVal = TimeVal {
- tv_sec :: !CLong
- tv_usec :: !CLong
}
getResidentSetMemory :: HasCallStack => IO CSize
getUpTime :: HasCallStack => IO Double
getHighResolutionTime :: IO Word64
newtype PID = PID CInt
getPID :: IO PID
getPPID :: IO PID
getHostname :: HasCallStack => IO CBytes
getOSName :: HasCallStack => IO OSName
data OSName = OSName {
- os_sysname :: CBytes
- os_release :: CBytes
- os_version :: CBytes
- os_machine :: CBytes
}
getPassWD :: HasCallStack => IO PassWD
data PassWD = PassWD {
- passwd_username :: CBytes
- passwd_uid :: UID
- passwd_gid :: GID
- passwd_shell :: CBytes
- passwd_homedir :: CBytes
}
data UID
data GID
getCPUInfo :: HasCallStack => IO [CPUInfo]
data CPUInfo = CPUInfo {
- cpu_model :: CBytes
- cpu_speed :: CInt
- cpu_times_user :: Word64
- cpu_times_nice :: Word64
- cpu_times_sys :: Word64
- cpu_times_idle :: Word64
- cpu_times_irq :: Word64
}
getLoadAvg :: IO (Double, Double, Double)
getFreeMem :: IO Word64
getTotalMem :: IO Word64
getConstrainedMem :: IO Word64

arguments

getArgs :: IO [CBytes] Source #

Computation getArgs returns a list of the program's command line arguments (including the program path).

This is different from base's getArgs since result includes the program path(more like C's *argv).

environment variables

getAllEnv :: HasCallStack => IO [(CBytes, CBytes)] Source #

Retrieves the environment variable.

Warning: This function is not thread safe.

getEnv :: HasCallStack => CBytes -> IO (Maybe CBytes) Source #

Retrieves the environment variable specified by name.

Warning: This function is not thread safe.

getEnv' :: HasCallStack => CBytes -> IO CBytes Source #

Retrieves the environment variable specified by name, throw NoSuchThing if not exists.

Warning: This function is not thread safe.

setEnv :: HasCallStack => CBytes -> CBytes -> IO () Source #

Creates or updates the environment variable specified by name with value.

Warning: This function is not thread safe.

unsetEnv :: HasCallStack => CBytes -> IO () Source #

Deletes the environment variable specified by name if such environment variable exists.

Warning: This function is not thread safe.

other environment infos

getCWD :: HasCallStack => IO CBytes Source #

Gets the current working directory.

chDir :: HasCallStack => CBytes -> IO () Source #

Changes the current working directory.

getHomeDir :: HasCallStack => IO CBytes Source #

Gets the current user’s home directory.

On Windows, first checks the USERPROFILE environment variable using GetEnvironmentVariableW(). If USERPROFILE is not set, GetUserProfileDirectoryW() is called. On all other operating systems, first checks the HOME environment variable using getenv(3). If HOME is not set, getpwuid_r(3) is called.

Warning getHomeDir is not thread safe.

getTempDir :: HasCallStack => IO CBytes Source #

Gets the temp directory.

On Windows, uses GetTempPathW(). On all other operating systems, uses the first environment variable found in the ordered list TMPDIR, TMP, TEMP, and TEMPDIR. If none of these are found, the path /tmp is used, or, on Android, /data/local/tmp is used.

Warning getHomeDir is not thread safe.

getRandom :: Int -> IO Bytes Source #

Fill buf with exactly buflen cryptographically strong random bytes acquired from the system CSPRNG.

The function may block indefinitely when not enough entropy is available, don't use it to get long random sequences.

getRandomT :: Int -> IO Bytes Source #

Fill buf with exactly buflen cryptographically strong random bytes acquired from the system CSPRNG.

The function run getRandom in libuv's threadpool, suitable for get long random byte sequences.

getResUsage :: HasCallStack => IO ResUsage Source #

Gets the resource usage measures for the current process.

On Windows not all fields are set, the unsupported fields are filled with zeroes. See ResUsage for more details.

data ResUsage Source #

Data type for resource usage results.

Members marked with (X) are unsupported on Windows. See getrusage(2) for supported fields on Unix

Constructors

Fields

ru_utime :: !TimeVal
user CPU time used, in microseconds
ru_stime :: !TimeVal
system CPU time used, in microseconds
ru_maxrss :: !Word64
maximum resident set size
ru_ixrss :: !Word64
integral shared memory size (X)
ru_idrss :: !Word64
integral unshared data size (X)
ru_isrss :: !Word64
integral unshared stack size (X)
ru_minflt :: !Word64
page reclaims (soft page faults) (X)
ru_majflt :: !Word64
page faults (hard page faults)
ru_nswap :: !Word64
swaps (X)
ru_inblock :: !Word64
block input operations
ru_oublock :: !Word64
block output operations
ru_msgsnd :: !Word64
IPC messages sent (X)
ru_msgrcv :: !Word64
IPC messages received (X)
ru_nsignals :: !Word64
signals received (X)
ru_nvcsw :: !Word64
voluntary context switches (X)
ru_nivcsw :: !Word64
involuntary context switches (X)

Instances

Instances details

Eq ResUsage Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods (==) :: ResUsage -> ResUsage -> Bool # (/=) :: ResUsage -> ResUsage -> Bool #
Ord ResUsage Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods compare :: ResUsage -> ResUsage -> Ordering # (<) :: ResUsage -> ResUsage -> Bool # (<=) :: ResUsage -> ResUsage -> Bool # (>) :: ResUsage -> ResUsage -> Bool # (>=) :: ResUsage -> ResUsage -> Bool # max :: ResUsage -> ResUsage -> ResUsage # min :: ResUsage -> ResUsage -> ResUsage #
Read ResUsage Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods readsPrec :: Int -> ReadS ResUsage # readList :: ReadS [ResUsage] # readPrec :: ReadPrec ResUsage # readListPrec :: ReadPrec [ResUsage] #
Show ResUsage Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods showsPrec :: Int -> ResUsage -> ShowS # show :: ResUsage -> String # showList :: [ResUsage] -> ShowS #
Generic ResUsage Source #
Instance details Defined in Z.IO.UV.FFI_Env Associated Types type Rep ResUsage :: Type -> Type # Methods from :: ResUsage -> Rep ResUsage x # to :: Rep ResUsage x -> ResUsage #
JSON ResUsage Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods fromValue :: Value -> Converter ResUsage # toValue :: ResUsage -> Value # encodeJSON :: ResUsage -> Builder () #
Print ResUsage Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods toUTF8BuilderP :: Int -> ResUsage -> Builder () #
type Rep ResUsage Source #
Instance details Defined in Z.IO.UV.FFI_Env type Rep ResUsage = D1 ('MetaData "ResUsage" "Z.IO.UV.FFI_Env" "Z-IO-0.6.4.0-3RdtkLMi3pWlcaS0GimBE" 'False) (C1 ('MetaCons "ResUsage" 'PrefixI 'True) ((((S1 ('MetaSel ('Just "ru_utime") 'SourceUnpack 'SourceStrict 'DecidedStrict) (Rec0 TimeVal) :: S1 ('MetaSel ('Just "ru_stime") 'SourceUnpack 'SourceStrict 'DecidedStrict) (Rec0 TimeVal)) :: (S1 ('MetaSel ('Just "ru_maxrss") 'SourceUnpack 'SourceStrict 'DecidedStrict) (Rec0 Word64) :: S1 ('MetaSel ('Just "ru_ixrss") 'SourceUnpack 'SourceStrict 'DecidedStrict) (Rec0 Word64))) :: ((S1 ('MetaSel ('Just "ru_idrss") 'SourceUnpack 'SourceStrict 'DecidedStrict) (Rec0 Word64) :: S1 ('MetaSel ('Just "ru_isrss") 'SourceUnpack 'SourceStrict 'DecidedStrict) (Rec0 Word64)) :: (S1 ('MetaSel ('Just "ru_minflt") 'SourceUnpack 'SourceStrict 'DecidedStrict) (Rec0 Word64) :: S1 ('MetaSel ('Just "ru_majflt") 'SourceUnpack 'SourceStrict 'DecidedStrict) (Rec0 Word64)))) :: (((S1 ('MetaSel ('Just "ru_nswap") 'SourceUnpack 'SourceStrict 'DecidedStrict) (Rec0 Word64) :: S1 ('MetaSel ('Just "ru_inblock") 'SourceUnpack 'SourceStrict 'DecidedStrict) (Rec0 Word64)) :: (S1 ('MetaSel ('Just "ru_oublock") 'SourceUnpack 'SourceStrict 'DecidedStrict) (Rec0 Word64) :: S1 ('MetaSel ('Just "ru_msgsnd") 'SourceUnpack 'SourceStrict 'DecidedStrict) (Rec0 Word64))) :: ((S1 ('MetaSel ('Just "ru_msgrcv") 'SourceUnpack 'SourceStrict 'DecidedStrict) (Rec0 Word64) :: S1 ('MetaSel ('Just "ru_nsignals") 'SourceUnpack 'SourceStrict 'DecidedStrict) (Rec0 Word64)) :: (S1 ('MetaSel ('Just "ru_nvcsw") 'SourceUnpack 'SourceStrict 'DecidedStrict) (Rec0 Word64) :*: S1 ('MetaSel ('Just "ru_nivcsw") 'SourceUnpack 'SourceStrict 'DecidedStrict) (Rec0 Word64))))))

data TimeVal Source #

Data type for storing times. typedef struct { long tv_sec; long tv_usec; } uv_timeval_t;

Constructors

TimeVal
Fields tv_sec :: !CLong tv_usec :: !CLong

Instances

Instances details

Eq TimeVal Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods (==) :: TimeVal -> TimeVal -> Bool # (/=) :: TimeVal -> TimeVal -> Bool #
Ord TimeVal Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods compare :: TimeVal -> TimeVal -> Ordering # (<) :: TimeVal -> TimeVal -> Bool # (<=) :: TimeVal -> TimeVal -> Bool # (>) :: TimeVal -> TimeVal -> Bool # (>=) :: TimeVal -> TimeVal -> Bool # max :: TimeVal -> TimeVal -> TimeVal # min :: TimeVal -> TimeVal -> TimeVal #
Read TimeVal Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods readsPrec :: Int -> ReadS TimeVal # readList :: ReadS [TimeVal] # readPrec :: ReadPrec TimeVal # readListPrec :: ReadPrec [TimeVal] #
Show TimeVal Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods showsPrec :: Int -> TimeVal -> ShowS # show :: TimeVal -> String # showList :: [TimeVal] -> ShowS #
Generic TimeVal Source #
Instance details Defined in Z.IO.UV.FFI_Env Associated Types type Rep TimeVal :: Type -> Type # Methods from :: TimeVal -> Rep TimeVal x # to :: Rep TimeVal x -> TimeVal #
JSON TimeVal Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods fromValue :: Value -> Converter TimeVal # toValue :: TimeVal -> Value # encodeJSON :: TimeVal -> Builder () #
Print TimeVal Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods toUTF8BuilderP :: Int -> TimeVal -> Builder () #
type Rep TimeVal Source #
Instance details Defined in Z.IO.UV.FFI_Env type Rep TimeVal = D1 ('MetaData "TimeVal" "Z.IO.UV.FFI_Env" "Z-IO-0.6.4.0-3RdtkLMi3pWlcaS0GimBE" 'False) (C1 ('MetaCons "TimeVal" 'PrefixI 'True) (S1 ('MetaSel ('Just "tv_sec") 'SourceUnpack 'SourceStrict 'DecidedStrict) (Rec0 CLong) :*: S1 ('MetaSel ('Just "tv_usec") 'SourceUnpack 'SourceStrict 'DecidedStrict) (Rec0 CLong)))

getResidentSetMemory :: HasCallStack => IO CSize Source #

Gets the resident set size (RSS) for the current process.

getUpTime :: HasCallStack => IO Double Source #

Gets the current system uptime.

getHighResolutionTime :: IO Word64 Source #

Returns the current high-resolution real time.

This is expressed in nanoseconds. It is relative to an arbitrary time in the past. It is not related to the time of day and therefore not subject to clock drift. The primary use is for measuring performance between intervals.

newtype PID Source #

Constructors

Instances

Instances details

Eq PID Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods (==) :: PID -> PID -> Bool # (/=) :: PID -> PID -> Bool #
Ord PID Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods compare :: PID -> PID -> Ordering # (<) :: PID -> PID -> Bool # (<=) :: PID -> PID -> Bool # (>) :: PID -> PID -> Bool # (>=) :: PID -> PID -> Bool # max :: PID -> PID -> PID # min :: PID -> PID -> PID #
Read PID Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods readsPrec :: Int -> ReadS PID # readList :: ReadS [PID] # readPrec :: ReadPrec PID # readListPrec :: ReadPrec [PID] #
Show PID Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods showsPrec :: Int -> PID -> ShowS # show :: PID -> String # showList :: [PID] -> ShowS #
Generic PID Source #
Instance details Defined in Z.IO.UV.FFI_Env Associated Types type Rep PID :: Type -> Type # Methods from :: PID -> Rep PID x # to :: Rep PID x -> PID #
JSON PID Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods fromValue :: Value -> Converter PID # toValue :: PID -> Value # encodeJSON :: PID -> Builder () #
Print PID Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods toUTF8BuilderP :: Int -> PID -> Builder () #
Unaligned PID Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods unalignedSize :: UnalignedSize PID # indexWord8ArrayAs# :: ByteArray# -> Int# -> PID # readWord8ArrayAs# :: MutableByteArray# s -> Int# -> State# s -> (# State# s, PID #) # writeWord8ArrayAs# :: MutableByteArray# s -> Int# -> PID -> State# s -> State# s # peekMBA :: MutableByteArray# RealWorld -> Int -> IO PID # pokeMBA :: MutableByteArray# RealWorld -> Int -> PID -> IO () # indexBA :: ByteArray# -> Int -> PID #
Prim PID Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods sizeOf# :: PID -> Int# # alignment# :: PID -> Int# # indexByteArray# :: ByteArray# -> Int# -> PID # readByteArray# :: MutableByteArray# s -> Int# -> State# s -> (# State# s, PID #) # writeByteArray# :: MutableByteArray# s -> Int# -> PID -> State# s -> State# s # setByteArray# :: MutableByteArray# s -> Int# -> Int# -> PID -> State# s -> State# s # indexOffAddr# :: Addr# -> Int# -> PID # readOffAddr# :: Addr# -> Int# -> State# s -> (# State# s, PID #) # writeOffAddr# :: Addr# -> Int# -> PID -> State# s -> State# s # setOffAddr# :: Addr# -> Int# -> Int# -> PID -> State# s -> State# s #
Storable PID Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods sizeOf :: PID -> Int # alignment :: PID -> Int # peekElemOff :: Ptr PID -> Int -> IO PID # pokeElemOff :: Ptr PID -> Int -> PID -> IO () # peekByteOff :: Ptr b -> Int -> IO PID # pokeByteOff :: Ptr b -> Int -> PID -> IO () # peek :: Ptr PID -> IO PID # poke :: Ptr PID -> PID -> IO () #
type Rep PID Source #
Instance details Defined in Z.IO.UV.FFI_Env type Rep PID = D1 ('MetaData "PID" "Z.IO.UV.FFI_Env" "Z-IO-0.6.4.0-3RdtkLMi3pWlcaS0GimBE" 'True) (C1 ('MetaCons "PID" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 CInt)))

getPID :: IO PID Source #

Returns the current process ID.

getPPID :: IO PID Source #

Returns the parent process ID.

getHostname :: HasCallStack => IO CBytes Source #

Returns the hostname as a null-terminated string.

getOSName :: HasCallStack => IO OSName Source #

data OSName Source #

Data type for operating system name and version information.

Constructors

OSName
Fields os_sysname :: CBytes os_release :: CBytes os_version :: CBytes os_machine :: CBytes

Instances

Instances details

Eq OSName Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods (==) :: OSName -> OSName -> Bool # (/=) :: OSName -> OSName -> Bool #
Ord OSName Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods compare :: OSName -> OSName -> Ordering # (<) :: OSName -> OSName -> Bool # (<=) :: OSName -> OSName -> Bool # (>) :: OSName -> OSName -> Bool # (>=) :: OSName -> OSName -> Bool # max :: OSName -> OSName -> OSName # min :: OSName -> OSName -> OSName #
Read OSName Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods readsPrec :: Int -> ReadS OSName # readList :: ReadS [OSName] # readPrec :: ReadPrec OSName # readListPrec :: ReadPrec [OSName] #
Show OSName Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods showsPrec :: Int -> OSName -> ShowS # show :: OSName -> String # showList :: [OSName] -> ShowS #
Generic OSName Source #
Instance details Defined in Z.IO.UV.FFI_Env Associated Types type Rep OSName :: Type -> Type # Methods from :: OSName -> Rep OSName x # to :: Rep OSName x -> OSName #
JSON OSName Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods fromValue :: Value -> Converter OSName # toValue :: OSName -> Value # encodeJSON :: OSName -> Builder () #
Print OSName Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods toUTF8BuilderP :: Int -> OSName -> Builder () #
type Rep OSName Source #
Instance details Defined in Z.IO.UV.FFI_Env type Rep OSName = D1 ('MetaData "OSName" "Z.IO.UV.FFI_Env" "Z-IO-0.6.4.0-3RdtkLMi3pWlcaS0GimBE" 'False) (C1 ('MetaCons "OSName" 'PrefixI 'True) ((S1 ('MetaSel ('Just "os_sysname") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 CBytes) :: S1 ('MetaSel ('Just "os_release") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 CBytes)) :: (S1 ('MetaSel ('Just "os_version") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 CBytes) :*: S1 ('MetaSel ('Just "os_machine") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 CBytes))))

getPassWD :: HasCallStack => IO PassWD Source #

Gets a subset of the password file entry for the current effective uid (not the real uid).

The populated data includes the username, euid, gid, shell, and home directory. On non-Windows systems, all data comes from getpwuid_r(3). On Windows, uid and gid are set to -1 and have no meaning, and shell is empty.

data PassWD Source #

Data type for password file information.

Constructors

PassWD
Fields passwd_username :: CBytes passwd_uid :: UID passwd_gid :: GID passwd_shell :: CBytes passwd_homedir :: CBytes

Instances

Instances details

Eq PassWD Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods (==) :: PassWD -> PassWD -> Bool # (/=) :: PassWD -> PassWD -> Bool #
Ord PassWD Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods compare :: PassWD -> PassWD -> Ordering # (<) :: PassWD -> PassWD -> Bool # (<=) :: PassWD -> PassWD -> Bool # (>) :: PassWD -> PassWD -> Bool # (>=) :: PassWD -> PassWD -> Bool # max :: PassWD -> PassWD -> PassWD # min :: PassWD -> PassWD -> PassWD #
Read PassWD Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods readsPrec :: Int -> ReadS PassWD # readList :: ReadS [PassWD] # readPrec :: ReadPrec PassWD # readListPrec :: ReadPrec [PassWD] #
Show PassWD Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods showsPrec :: Int -> PassWD -> ShowS # show :: PassWD -> String # showList :: [PassWD] -> ShowS #
Generic PassWD Source #
Instance details Defined in Z.IO.UV.FFI_Env Associated Types type Rep PassWD :: Type -> Type # Methods from :: PassWD -> Rep PassWD x # to :: Rep PassWD x -> PassWD #
JSON PassWD Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods fromValue :: Value -> Converter PassWD # toValue :: PassWD -> Value # encodeJSON :: PassWD -> Builder () #
Print PassWD Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods toUTF8BuilderP :: Int -> PassWD -> Builder () #
type Rep PassWD Source #
Instance details Defined in Z.IO.UV.FFI_Env type Rep PassWD = D1 ('MetaData "PassWD" "Z.IO.UV.FFI_Env" "Z-IO-0.6.4.0-3RdtkLMi3pWlcaS0GimBE" 'False) (C1 ('MetaCons "PassWD" 'PrefixI 'True) ((S1 ('MetaSel ('Just "passwd_username") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 CBytes) :: S1 ('MetaSel ('Just "passwd_uid") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 UID)) :: (S1 ('MetaSel ('Just "passwd_gid") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 GID) :: (S1 ('MetaSel ('Just "passwd_shell") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 CBytes) :: S1 ('MetaSel ('Just "passwd_homedir") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 CBytes)))))

data UID Source #

Instances

Instances details

Eq UID Source #
Instance details Defined in Z.IO.UV.FFI Methods (==) :: UID -> UID -> Bool # (/=) :: UID -> UID -> Bool #
Num UID Source #
Instance details Defined in Z.IO.UV.FFI Methods (+) :: UID -> UID -> UID # (-) :: UID -> UID -> UID # (*) :: UID -> UID -> UID # negate :: UID -> UID # abs :: UID -> UID # signum :: UID -> UID # fromInteger :: Integer -> UID #
Ord UID Source #
Instance details Defined in Z.IO.UV.FFI Methods compare :: UID -> UID -> Ordering # (<) :: UID -> UID -> Bool # (<=) :: UID -> UID -> Bool # (>) :: UID -> UID -> Bool # (>=) :: UID -> UID -> Bool # max :: UID -> UID -> UID # min :: UID -> UID -> UID #
Read UID Source #
Instance details Defined in Z.IO.UV.FFI Methods readsPrec :: Int -> ReadS UID # readList :: ReadS [UID] # readPrec :: ReadPrec UID # readListPrec :: ReadPrec [UID] #
Show UID Source #
Instance details Defined in Z.IO.UV.FFI Methods showsPrec :: Int -> UID -> ShowS # show :: UID -> String # showList :: [UID] -> ShowS #
Generic UID Source #
Instance details Defined in Z.IO.UV.FFI Associated Types type Rep UID :: Type -> Type # Methods from :: UID -> Rep UID x # to :: Rep UID x -> UID #
JSON UID Source #
Instance details Defined in Z.IO.UV.FFI Methods fromValue :: Value -> Converter UID # toValue :: UID -> Value # encodeJSON :: UID -> Builder () #
Print UID Source #
Instance details Defined in Z.IO.UV.FFI Methods toUTF8BuilderP :: Int -> UID -> Builder () #
Unaligned UID Source #
Instance details Defined in Z.IO.UV.FFI Methods unalignedSize :: UnalignedSize UID # indexWord8ArrayAs# :: ByteArray# -> Int# -> UID # readWord8ArrayAs# :: MutableByteArray# s -> Int# -> State# s -> (# State# s, UID #) # writeWord8ArrayAs# :: MutableByteArray# s -> Int# -> UID -> State# s -> State# s # peekMBA :: MutableByteArray# RealWorld -> Int -> IO UID # pokeMBA :: MutableByteArray# RealWorld -> Int -> UID -> IO () # indexBA :: ByteArray# -> Int -> UID #
Prim UID Source #
Instance details Defined in Z.IO.UV.FFI Methods sizeOf# :: UID -> Int# # alignment# :: UID -> Int# # indexByteArray# :: ByteArray# -> Int# -> UID # readByteArray# :: MutableByteArray# s -> Int# -> State# s -> (# State# s, UID #) # writeByteArray# :: MutableByteArray# s -> Int# -> UID -> State# s -> State# s # setByteArray# :: MutableByteArray# s -> Int# -> Int# -> UID -> State# s -> State# s # indexOffAddr# :: Addr# -> Int# -> UID # readOffAddr# :: Addr# -> Int# -> State# s -> (# State# s, UID #) # writeOffAddr# :: Addr# -> Int# -> UID -> State# s -> State# s # setOffAddr# :: Addr# -> Int# -> Int# -> UID -> State# s -> State# s #
Storable UID Source #
Instance details Defined in Z.IO.UV.FFI Methods sizeOf :: UID -> Int # alignment :: UID -> Int # peekElemOff :: Ptr UID -> Int -> IO UID # pokeElemOff :: Ptr UID -> Int -> UID -> IO () # peekByteOff :: Ptr b -> Int -> IO UID # pokeByteOff :: Ptr b -> Int -> UID -> IO () # peek :: Ptr UID -> IO UID # poke :: Ptr UID -> UID -> IO () #
type Rep UID Source #
Instance details Defined in Z.IO.UV.FFI type Rep UID = D1 ('MetaData "UID" "Z.IO.UV.FFI" "Z-IO-0.6.4.0-3RdtkLMi3pWlcaS0GimBE" 'True) (C1 ('MetaCons "UID" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Word32)))

data GID Source #

Instances

Instances details

Eq GID Source #
Instance details Defined in Z.IO.UV.FFI Methods (==) :: GID -> GID -> Bool # (/=) :: GID -> GID -> Bool #
Num GID Source #
Instance details Defined in Z.IO.UV.FFI Methods (+) :: GID -> GID -> GID # (-) :: GID -> GID -> GID # (*) :: GID -> GID -> GID # negate :: GID -> GID # abs :: GID -> GID # signum :: GID -> GID # fromInteger :: Integer -> GID #
Ord GID Source #
Instance details Defined in Z.IO.UV.FFI Methods compare :: GID -> GID -> Ordering # (<) :: GID -> GID -> Bool # (<=) :: GID -> GID -> Bool # (>) :: GID -> GID -> Bool # (>=) :: GID -> GID -> Bool # max :: GID -> GID -> GID # min :: GID -> GID -> GID #
Read GID Source #
Instance details Defined in Z.IO.UV.FFI Methods readsPrec :: Int -> ReadS GID # readList :: ReadS [GID] # readPrec :: ReadPrec GID # readListPrec :: ReadPrec [GID] #
Show GID Source #
Instance details Defined in Z.IO.UV.FFI Methods showsPrec :: Int -> GID -> ShowS # show :: GID -> String # showList :: [GID] -> ShowS #
Generic GID Source #
Instance details Defined in Z.IO.UV.FFI Associated Types type Rep GID :: Type -> Type # Methods from :: GID -> Rep GID x # to :: Rep GID x -> GID #
JSON GID Source #
Instance details Defined in Z.IO.UV.FFI Methods fromValue :: Value -> Converter GID # toValue :: GID -> Value # encodeJSON :: GID -> Builder () #
Print GID Source #
Instance details Defined in Z.IO.UV.FFI Methods toUTF8BuilderP :: Int -> GID -> Builder () #
Unaligned GID Source #
Instance details Defined in Z.IO.UV.FFI Methods unalignedSize :: UnalignedSize GID # indexWord8ArrayAs# :: ByteArray# -> Int# -> GID # readWord8ArrayAs# :: MutableByteArray# s -> Int# -> State# s -> (# State# s, GID #) # writeWord8ArrayAs# :: MutableByteArray# s -> Int# -> GID -> State# s -> State# s # peekMBA :: MutableByteArray# RealWorld -> Int -> IO GID # pokeMBA :: MutableByteArray# RealWorld -> Int -> GID -> IO () # indexBA :: ByteArray# -> Int -> GID #
Prim GID Source #
Instance details Defined in Z.IO.UV.FFI Methods sizeOf# :: GID -> Int# # alignment# :: GID -> Int# # indexByteArray# :: ByteArray# -> Int# -> GID # readByteArray# :: MutableByteArray# s -> Int# -> State# s -> (# State# s, GID #) # writeByteArray# :: MutableByteArray# s -> Int# -> GID -> State# s -> State# s # setByteArray# :: MutableByteArray# s -> Int# -> Int# -> GID -> State# s -> State# s # indexOffAddr# :: Addr# -> Int# -> GID # readOffAddr# :: Addr# -> Int# -> State# s -> (# State# s, GID #) # writeOffAddr# :: Addr# -> Int# -> GID -> State# s -> State# s # setOffAddr# :: Addr# -> Int# -> Int# -> GID -> State# s -> State# s #
Storable GID Source #
Instance details Defined in Z.IO.UV.FFI Methods sizeOf :: GID -> Int # alignment :: GID -> Int # peekElemOff :: Ptr GID -> Int -> IO GID # pokeElemOff :: Ptr GID -> Int -> GID -> IO () # peekByteOff :: Ptr b -> Int -> IO GID # pokeByteOff :: Ptr b -> Int -> GID -> IO () # peek :: Ptr GID -> IO GID # poke :: Ptr GID -> GID -> IO () #
type Rep GID Source #
Instance details Defined in Z.IO.UV.FFI type Rep GID = D1 ('MetaData "GID" "Z.IO.UV.FFI" "Z-IO-0.6.4.0-3RdtkLMi3pWlcaS0GimBE" 'True) (C1 ('MetaCons "GID" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Word32)))

getCPUInfo :: HasCallStack => IO [CPUInfo] Source #

Gets information about the CPUs on the system.

data CPUInfo Source #

Data type for CPU information.

Constructors

CPUInfo
Fields cpu_model :: CBytes cpu_speed :: CInt cpu_times_user :: Word64 milliseconds cpu_times_nice :: Word64 milliseconds cpu_times_sys :: Word64 milliseconds cpu_times_idle :: Word64 milliseconds cpu_times_irq :: Word64 milliseconds

Instances

Instances details

Eq CPUInfo Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods (==) :: CPUInfo -> CPUInfo -> Bool # (/=) :: CPUInfo -> CPUInfo -> Bool #
Ord CPUInfo Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods compare :: CPUInfo -> CPUInfo -> Ordering # (<) :: CPUInfo -> CPUInfo -> Bool # (<=) :: CPUInfo -> CPUInfo -> Bool # (>) :: CPUInfo -> CPUInfo -> Bool # (>=) :: CPUInfo -> CPUInfo -> Bool # max :: CPUInfo -> CPUInfo -> CPUInfo # min :: CPUInfo -> CPUInfo -> CPUInfo #
Read CPUInfo Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods readsPrec :: Int -> ReadS CPUInfo # readList :: ReadS [CPUInfo] # readPrec :: ReadPrec CPUInfo # readListPrec :: ReadPrec [CPUInfo] #
Show CPUInfo Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods showsPrec :: Int -> CPUInfo -> ShowS # show :: CPUInfo -> String # showList :: [CPUInfo] -> ShowS #
Generic CPUInfo Source #
Instance details Defined in Z.IO.UV.FFI_Env Associated Types type Rep CPUInfo :: Type -> Type # Methods from :: CPUInfo -> Rep CPUInfo x # to :: Rep CPUInfo x -> CPUInfo #
JSON CPUInfo Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods fromValue :: Value -> Converter CPUInfo # toValue :: CPUInfo -> Value # encodeJSON :: CPUInfo -> Builder () #
Print CPUInfo Source #
Instance details Defined in Z.IO.UV.FFI_Env Methods toUTF8BuilderP :: Int -> CPUInfo -> Builder () #
type Rep CPUInfo Source #
Instance details Defined in Z.IO.UV.FFI_Env type Rep CPUInfo = D1 ('MetaData "CPUInfo" "Z.IO.UV.FFI_Env" "Z-IO-0.6.4.0-3RdtkLMi3pWlcaS0GimBE" 'False) (C1 ('MetaCons "CPUInfo" 'PrefixI 'True) ((S1 ('MetaSel ('Just "cpu_model") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 CBytes) :: (S1 ('MetaSel ('Just "cpu_speed") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 CInt) :: S1 ('MetaSel ('Just "cpu_times_user") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Word64))) :: ((S1 ('MetaSel ('Just "cpu_times_nice") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Word64) :: S1 ('MetaSel ('Just "cpu_times_sys") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Word64)) :: (S1 ('MetaSel ('Just "cpu_times_idle") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Word64) :: S1 ('MetaSel ('Just "cpu_times_irq") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Word64)))))

getLoadAvg :: IO (Double, Double, Double) Source #

Gets the load average. See: https://en.wikipedia.org/wiki/Load_(computing)

getFreeMem :: IO Word64 Source #

Gets the amount of free memory available in the system, as reported by the kernel (in bytes).

getTotalMem :: IO Word64 Source #

Gets the total amount of physical memory in the system (in bytes).

getConstrainedMem :: IO Word64 Source #

Gets the amount of memory available to the process (in bytes) based on limits imposed by the OS.

If there is no such constraint, or the constraint is unknown, 0 is returned. Note that it is not unusual for this value to be less than or greater than getTotalMem. Note This function currently only returns a non-zero value on Linux, based on cgroups if it is present.