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49 lines
1.5 KiB
Idris
49 lines
1.5 KiB
Idris
module System.File.Process
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import public System.Escape
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import public System.File.Error
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import public System.File.Mode
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import System.File.Support
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import public System.File.Types
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%foreign "C:fflush,libc 6"
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prim__flush : FilePtr -> PrimIO Int
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%foreign support "idris2_popen"
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prim__popen : String -> String -> PrimIO FilePtr
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%foreign support "idris2_pclose"
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prim__pclose : FilePtr -> PrimIO Int
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||| Force a write of all user-space buffered data for the given `File`.
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||| @ h the file handle to flush
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export
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fflush : HasIO io => (h : File) -> io ()
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fflush (FHandle f)
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= ignore $ primIO (prim__flush f)
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||| Create a new unidirectional pipe by invoking the shell, which is passed the
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||| given command-string using the '-c' flag, in a new process. The pipe is
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||| opened with the given mode.
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||| @ cmd the command to pass to the shell
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||| @ m the mode the pipe should have
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export
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popen : HasIO io => (cmd : String) -> (m : Mode) -> io (Either FileError File)
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popen cmd m = do
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ptr <- primIO (prim__popen cmd (modeStr m))
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if prim__nullAnyPtr ptr /= 0
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then returnError
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else pure (Right (FHandle ptr))
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namespace Escaped
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export
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popen : HasIO io => (cmd : List String) -> (m : Mode) -> io (Either FileError File)
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popen = popen . escapeCmd
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||| Wait for the process associated with the pipe to terminate.
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||| @ fh the file handle to the stream to close/wait on
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export
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pclose : HasIO io => (fh : File) -> io Int
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pclose (FHandle h) = primIO (prim__pclose h)
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