| Copyright | (c) The University of Glasgow 2001 |
|---|---|
| License | BSD-style (see the file libraries/base/LICENSE) |
| Maintainer | [email protected] |
| Stability | provisional |
| Portability | portable |
| Safe Haskell | Safe |
| Language | Haskell2010 |
System.Cmd
Description
Deprecated: Use System.Process instead
Executing an external command.
This module provides a simple interface for executing external commands. For a more complex, but more powerful, interface, see the System.Process module.
Documentation
system :: String -> IO ExitCode Source #
Computation system cmd returns the exit code produced when the
operating system runs the shell command cmd.
This computation may fail with one of the following
IOErrorType exceptions:
PermissionDenied- The process has insufficient privileges to perform the operation.
ResourceExhausted- Insufficient resources are available to perform the operation.
UnsupportedOperation- The implementation does not support system calls.
On Windows, system passes the command to the Windows command
interpreter (CMD.EXE or COMMAND.COM), hence Unixy shell tricks
will not work.
On Unix systems, see waitForProcess for the meaning of exit codes
when the process died as the result of a signal.
rawSystem :: String -> [String] -> IO ExitCode Source #
The computation rawSystem cmd argscmd in such a way that it receives as arguments the args strings
exactly as given, with no funny escaping or shell meta-syntax expansion.
It will therefore behave more portably between operating systems than system.
The return codes and possible failures are the same as for system.