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/*****************************************************************************
* Written by Chris Dunlap <cdunlap@llnl.gov>.
* Copyright (C) 2007-2022 Lawrence Livermore National Security, LLC.
* Copyright (C) 2001-2007 The Regents of the University of California.
* UCRL-CODE-2002-009.
*
* This file is part of ConMan: The Console Manager.
* For details, see <https://dun.github.io/conman/>.
*
* ConMan 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.
*
* ConMan 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 ConMan. If not, see <http://www.gnu.org/licenses/>.
*****************************************************************************/
#if HAVE_CONFIG_H
# include <config.h>
#endif /* HAVE_CONFIG_H */
#include <assert.h>
#include <errno.h>
#include <stdlib.h>
#include <termios.h>
#include <unistd.h>
#include "common.h"
#include "log.h"
#include "util-str.h"
#include "util.h"
const char *conman_license = \
"ConMan: The Console Manager\n" \
"https://dun.github.io/conman/\n" \
"\n" \
"Written by Chris Dunlap <cdunlap@llnl.gov>.\n" \
"Copyright (C) 2007-2022 Lawrence Livermore National Security, LLC.\n" \
"Copyright (C) 2001-2007 The Regents of the University of California.\n" \
"\n" \
"ConMan is free software: you can redistribute it and/or modify it\n" \
"under the terms of the GNU General Public License as published by\n" \
"the Free Software Foundation; either version 3 of the License, or\n" \
"(at your option) any later version.\n" \
"\n";
char *proto_strs[] = {
/*
* Keep strings in sync w/ common.h:proto_toks enum.
* These must be sorted in a case-insensitive manner.
*/
"BROADCAST",
"CODE",
"CONNECT",
"CONSOLE",
"ERROR",
"FORCE",
"HELLO",
"JOIN",
"MESSAGE",
"MONITOR",
"OK",
"OPTION",
"QUERY",
"QUIET",
"REGEX",
"RESET",
"TTY",
"USER",
NULL
};
req_t * create_req(void)
{
/* Creates and returns a request struct.
*/
req_t *req;
if (!(req = malloc(sizeof(req_t))))
out_of_memory();
req->sd = -1;
req->user = NULL;
req->tty = NULL;
req->fqdn = NULL;
req->host = NULL;
req->ip = NULL;
req->port = 0;
req->consoles = list_create((ListDelF) destroy_string);
req->command = CONMAN_CMD_NONE;
req->enableBroadcast = 0;
req->enableEcho = 0;
req->enableForce = 0;
req->enableJoin = 0;
req->enableQuiet = 0;
req->enableRegex = 0;
req->enableReset = 0;
return(req);
}
void destroy_req(req_t *req)
{
/* Destroys a request struct.
*/
if (!req)
return;
if (req->sd >= 0) {
if (close(req->sd) < 0)
log_err(errno, "close() failed on fd=%d", req->sd);
req->sd = -1;
}
if (req->user)
free(req->user);
if (req->tty)
free(req->tty);
if (req->fqdn)
free(req->fqdn);
if (req->host)
free(req->host);
if (req->ip)
free(req->ip);
if (req->consoles)
list_destroy(req->consoles);
free(req);
return;
}
void get_tty_mode(struct termios *tty, int fd)
{
/* Gets the tty values associated with 'fd' and stores them in 'tty'.
*/
assert(fd >= 0);
assert(tty != NULL);
if (!isatty(fd))
return;
if (tcgetattr(fd, tty) < 0)
log_err(errno, "tcgetattr() failed on fd=%d", fd);
return;
}
void set_tty_mode(struct termios *tty, int fd)
{
/* Sets the tty values associated with 'fd' to those stored in 'tty'.
*
* FIXME: tcsetattr() returns 0 (success) if it is able to perform ANY of the
* requested actions. Therefore, after calling tcsetattr(), one must call
* tcgetattr() and compare the actual terminal's attributes to the desired
* attributes to detect any differences. (APUE2 18.4)
*/
assert(fd >= 0);
assert(tty != NULL);
if (!isatty(fd))
return;
if (tcsetattr(fd, TCSAFLUSH, tty) < 0)
log_err(errno, "tcgetattr() failed on fd=%d", fd);
return;
}
void get_tty_raw(struct termios *tty, int fd)
{
/* Gets the tty values associated with 'fd' and stores them in 'tty',
* adjusting them to reflect the device is operating in "raw" mode.
* Note that the 'fd' device is not placed in raw mode by this call;
* to do so, invoke set_tty_mode() with the updated termios struct.
*/
assert(tty != NULL);
get_tty_mode(tty, fd);
/* Disable SIGINT on BREAK, CR-to-NL, input parity check,
* stripping 8th bit on input, and output flow control.
*/
tty->c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);
/* Disable output processing.
*/
tty->c_oflag &= ~(OPOST);
/* Set 8 bits/char.
*/
tty->c_cflag &= ~CSIZE;
tty->c_cflag |= CS8;
/* Disable parity checking.
*/
tty->c_cflag &= ~PARENB;
/* Ignore modem status lines for locally attached device.
*/
tty->c_cflag |= CLOCAL;
/* Disable echo, canonical mode, extended input processing, signal chars.
*/
tty->c_lflag &= ~(ECHO | ECHOCTL | ICANON | IEXTEN | ISIG);
/* read() does not return until data is present (may block indefinitely).
*/
tty->c_cc[VMIN] = 1;
tty->c_cc[VTIME] = 0;
return;
}
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