#
# This file is free software, which comes along with NIT. This software is
# distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
-# without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
# PARTICULAR PURPOSE. You can modify it is you want, provided this header
# is kept unaltered, and a notification of the changes is added.
# You are allowed to redistribute it and sell it, alone or is a part of
# Invocation and management of operating system sub-processes.
# Standard input and output can be handled through streams.
-package exec
+module exec
import stream
data.wait
assert is_finished
end
-
+
# The status once finished
fun status: Int
do
return data.status
end
+ # The executable run
+ # Is a filepath, or a executable found in PATH
+ var command: String
+
+ # The arguments of the command
+ # Starts with the first real arguments---ie. does not include the progname (`argv[0]`, in C)
+ var arguments: nullable Array[String]
+
# Launch a command with some arguments
init(command: String, arguments: String...)
do
- execute(command, arguments, 0)
+ self.command = command
+ self.arguments = arguments
+ execute
end
- # Launch a simple command without arguments
- init init_(command: String)
+ # Launch a simple command with arguments passed as an array
+ init from_a(command: String, arguments: nullable Array[String])
do
- execute(command, null, 0)
+ self.command = command
+ self.arguments = arguments
+ execute
end
+ # flags used internally to know whith pipe to open
+ private fun pipeflags: Int do return 0
+
# Internal code to handle execution
- protected init execute(command: String, arguments: nullable Array[String], pipeflags: Int)
+ protected fun execute
do
- var args = new Buffer
+ # The pass the arguments as a big C string where elements are separated with '\0'
+ var args = new FlatBuffer
var l = 1 # Number of elements in args
args.append(command)
if arguments != null then
for a in arguments do
args.add('\0')
+ #a.output_class_name
args.append(a)
end
l += arguments.length
end
data = basic_exec_execute(command.to_cstring, args.to_s.to_cstring, l, pipeflags)
end
-
+
private var data: NativeProcess
private fun basic_exec_execute(p: NativeString, av: NativeString, ac: Int, pf: Int): NativeProcess is extern "exec_Process_Process_basic_exec_execute_4"
end
class IProcess
super Process
super IStream
- var stream_in: FDIStream
-
+
+ # File Descriptor used for the input.
+ var stream_in: FDIStream is noinit
+
redef fun close do stream_in.close
-
+
redef fun read_char do return stream_in.read_char
redef fun eof do return stream_in.eof
- init(command: String, arguments: String...)
- do
- execute(command, arguments, 2)
- stream_in = new FDIStream(data.out_fd)
- end
-
- init init_(command: String)
+ redef fun pipeflags do return 2
+
+ redef fun execute
do
- execute(command, null, 2)
+ super
stream_in = new FDIStream(data.out_fd)
end
end
class OProcess
super Process
super OStream
- var stream_out: OStream
+
+ # File Descriptor used for the output.
+ var stream_out: OStream is noinit
redef fun close do stream_out.close
redef fun is_writable do return stream_out.is_writable
redef fun write(s) do stream_out.write(s)
-
- init(command: String, arguments: String...)
- do
- execute(command, arguments, 1)
- stream_out = new FDOStream(data.in_fd)
- end
-
- init init_(command: String)
+
+ redef fun pipeflags do return 1
+
+ redef fun execute
do
- execute(command, null, 1)
+ super
stream_out = new FDOStream(data.in_fd)
end
end
stream_out.close
end
- init(command: String, arguments: String...)
- do
- execute(command, arguments, 3)
- stream_in = new FDIStream(data.out_fd)
- stream_out = new FDOStream(data.in_fd)
- end
-
- init init_(command: String)
+ redef fun pipeflags do return 3
+
+ redef fun execute
do
- execute(command, null, 3)
- stream_in = new FDIStream(data.out_fd)
- stream_out = new FDOStream(data.in_fd)
+ super
end
end
# Execute a shell command and return its error code
fun system(command: String): Int
do
- return command.to_cstring.system
+ return command.to_cstring.system
end
end
redef class NativeString
+ # Execute self as a shell command.
+ #
+ # See the posix function system(3).
fun system: Int is extern "string_NativeString_NativeString_system_0"
end
-private extern NativeProcess
+private extern class NativeProcess
fun id: Int is extern "exec_NativeProcess_NativeProcess_id_0"
fun is_finished: Bool is extern "exec_NativeProcess_NativeProcess_is_finished_0"
fun status: Int is extern "exec_NativeProcess_NativeProcess_status_0"
nitlanguage / nit.git / blobdiff