46 lines
2.5 KiB
C
46 lines
2.5 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
|
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ Copyright 2020 Justine Alexandra Roberts Tunney │
|
|
│ │
|
|
│ Permission to use, copy, modify, and/or distribute this software for │
|
|
│ any purpose with or without fee is hereby granted, provided that the │
|
|
│ above copyright notice and this permission notice appear in all copies. │
|
|
│ │
|
|
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
|
|
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
|
|
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
|
|
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
|
|
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
|
|
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
|
|
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
|
|
│ PERFORMANCE OF THIS SOFTWARE. │
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
#include "dsp/tty/tty.h"
|
|
#include "libc/assert.h"
|
|
#include "libc/calls/termios.h"
|
|
#include "libc/str/str.h"
|
|
#include "libc/sysv/consts/termios.h"
|
|
|
|
/**
|
|
* Applies configuration to teletypewriter.
|
|
*
|
|
* @param opt_out_oldconf is only modified if successful
|
|
* @return 0 on success, or -1 w/ errno
|
|
* @see ttyconfig(), ttyrestore()
|
|
*/
|
|
int ttyconfig(int ttyfd, ttyconf_f fn, int64_t arg,
|
|
const struct termios *opt_out_oldconf) {
|
|
struct termios conf[2];
|
|
if (tcgetattr(ttyfd, &conf[0]) != -1 &&
|
|
fn(memcpy(&conf[1], &conf[0], sizeof(conf[0])), arg) != -1 &&
|
|
tcsetattr(ttyfd, TCSAFLUSH, &conf[1]) != -1) {
|
|
if (opt_out_oldconf) {
|
|
memcpy(opt_out_oldconf, &conf[0], sizeof(conf[0]));
|
|
}
|
|
return 0;
|
|
} else {
|
|
return -1;
|
|
}
|
|
}
|