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Convert to posix_spawn #17

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Convert to posix_spawn #17

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c0e44dc
Convert to posix_spawn
Samasaur1 Oct 24, 2022
dabf1ea
Remove dumped info
Samasaur1 Oct 24, 2022
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60 changes: 39 additions & 21 deletions Sources/REPL/main.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -177,36 +177,19 @@ func prompt() -> String {
// waitpid(pid, nil, 0)
//}

var task: Process = Process()
func exec(_ command: String) -> String {
task = Process()
task.launchPath = "/bin/bash"
task.arguments = ["-c", command]

let pipe = Pipe()
task.standardOutput = pipe
task.launch()

let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output: String = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String

return output
}

// MARK: - Begin REPL
print("Initializing REPL with command: \(command)")
print("Use ^D to exit")
print()

var key: Int = 0
let c: cc_t = 0
let cct = (c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c) // Set of 20 Special Characters
var originalTerm: termios = termios(c_iflag: 0, c_oflag: 0, c_cflag: 0, c_lflag: 0, c_cc: cct, c_ispeed: 0, c_ospeed: 0)
var originalTerm = termios()
tcgetattr(STDIN_FILENO, &originalTerm) //this gets the current settings
var term = originalTerm
term.c_lflag &= ~(UInt(Darwin.ECHO) | UInt(Darwin.ICANON)) //turn off ECHO and ICANON
tcsetattr(STDIN_FILENO, TCSANOW, &term) //set these new settings

var __t = termios()

func resetTermAndExitWith(sig: Int32) {
tcsetattr(STDIN_FILENO, TCSANOW, &originalTerm)
exit(sig)
Expand All @@ -216,6 +199,40 @@ signal(SIGTERM, resetTermAndExitWith(sig:))
signal(SIGQUIT, resetTermAndExitWith(sig:))
signal(SIGSTOP, resetTermAndExitWith(sig:))

var task: Process = Process()
func exec(_ command: String) -> String {
/*
task = Process()
task.launchPath = "/bin/bash"
task.arguments = ["-c", command]

let pipe = Pipe()
task.standardOutput = pipe
task.launch()

let data = pipe.fileHandleForReading.readDataToEndOfFile()
let output: String = NSString(data: data, encoding: String.Encoding.utf8.rawValue)! as String

return output
*/
var pid = pid_t()
let args = ["/usr/bin/env"] + command.split(separator: " ").map(String.init)
let c_args = args.map { $0.withCString(strdup)! }
defer { for arg in c_args { free(arg) } }
tcgetattr(STDIN_FILENO, &__t)
__t.c_lflag |= (UInt(ECHO) | UInt(ICANON))
//tcsetattr(STDIN_FILENO, TCSANOW, &originalTerm)
tcsetattr(STDIN_FILENO, TCSANOW, &__t)
posix_spawn(&pid, c_args[0], nil, nil, c_args + [nil], environ)
tcgetattr(STDIN_FILENO, &__t)
__t.c_lflag &= ~(UInt(ECHO) | UInt(ICANON))
//tcsetattr(STDIN_FILENO, TCSANOW, &term)
tcsetattr(STDIN_FILENO, TCSANOW, &__t)
waitpid(pid, nil, 0)
return ""
}


var chars: [Int32] = []
var charIdx = 0
var commands: [String] = [""]
Expand Down Expand Up @@ -307,7 +324,8 @@ while true {
print()
if !chars.isEmpty {
let input = String(chars.map { Character(UnicodeScalar(UInt32($0))!) })
print(exec("\(command) \(input)"), terminator: "")
//print(exec("\(command) \(input)"), terminator: "")
exec("\(command) \(input)")
commands.append(input)
}
chars = []
Expand Down