76 lines
2.7 KiB
Go
76 lines
2.7 KiB
Go
// Mgmt
|
|
// Copyright (C) 2013-2024+ James Shubin and the project contributors
|
|
// Written by James Shubin <james@shubin.ca> and the project contributors
|
|
//
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program 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 PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
//
|
|
// Additional permission under GNU GPL version 3 section 7
|
|
//
|
|
// If you modify this program, or any covered work, by linking or combining it
|
|
// with embedded mcl code and modules (and that the embedded mcl code and
|
|
// modules which link with this program, contain a copy of their source code in
|
|
// the authoritative form) containing parts covered by the terms of any other
|
|
// license, the licensors of this program grant you additional permission to
|
|
// convey the resulting work. Furthermore, the licensors of this program grant
|
|
// the original author, James Shubin, additional permission to update this
|
|
// additional permission if he deems it necessary to achieve the goals of this
|
|
// additional permission.
|
|
|
|
// This program works exactly like the `tee` program, if it was invoked with an
|
|
// implicit --ignore-interrupts argument, and if it also had an --ignore-quit
|
|
// argument. These are needed so that it doesn't exit prematurely when called as
|
|
// a receiving member of a shell pipeline. This is needed so that a ^C or ^\ can
|
|
// cause the sending process to shutdown and relay its data into the tee. Sadly,
|
|
// the venerable `tee` program can't currently ignore the QUIT signal.
|
|
package main
|
|
|
|
import (
|
|
"fmt"
|
|
"io"
|
|
"os"
|
|
"os/signal"
|
|
"syscall"
|
|
)
|
|
|
|
func main() {
|
|
// TODO: Add better argv parsing and implement explicit flags for
|
|
// --ignore-interrupts argument, and --ignore-quit so that it's cleaner.
|
|
if len(os.Args) != 2 {
|
|
fmt.Fprintf(os.Stderr, "usage: <STDIN> | %s <FILE>\n", os.Args[0])
|
|
os.Exit(1)
|
|
return
|
|
}
|
|
filename := os.Args[1]
|
|
|
|
// Make sure we ignore ^C and ^\ when run in a shell pipe.
|
|
signal.Ignore(os.Interrupt, syscall.SIGQUIT) // TODO: add os.Kill ?
|
|
|
|
f, err := os.Create(filename)
|
|
if err != nil {
|
|
fmt.Fprintf(os.Stderr, "can't write to: %s\n", filename)
|
|
os.Exit(1)
|
|
return
|
|
}
|
|
defer f.Close()
|
|
|
|
writer := io.MultiWriter(os.Stdout, f) // tee !
|
|
|
|
_, err = io.Copy(writer, os.Stdin)
|
|
if err != nil {
|
|
fmt.Fprintf(os.Stderr, "copy error: %+v\n", err)
|
|
os.Exit(1)
|
|
return
|
|
}
|
|
}
|