2002-06-04 20:45:46 +00:00
|
|
|
/* vi: set sw=4 ts=4: */
|
2011-01-24 13:35:09 +00:00
|
|
|
/*
|
|
|
|
* Based on agetty - another getty program for Linux. By W. Z. Venema 1989
|
2006-07-12 07:56:04 +00:00
|
|
|
* Ported to Linux by Peter Orbaek <poe@daimi.aau.dk>
|
2011-01-23 23:16:50 +00:00
|
|
|
* This program is freely distributable.
|
2006-07-12 07:56:04 +00:00
|
|
|
*
|
|
|
|
* option added by Eric Rasmussen <ear@usfirst.org> - 12/28/95
|
|
|
|
*
|
2008-03-17 09:29:43 +00:00
|
|
|
* 1999-02-22 Arkadiusz Mickiewicz <misiek@misiek.eu.org>
|
2011-01-24 13:35:09 +00:00
|
|
|
* - Added Native Language Support
|
2008-03-17 09:29:43 +00:00
|
|
|
*
|
2006-07-12 07:56:04 +00:00
|
|
|
* 1999-05-05 Thorsten Kranzkowski <dl8bcu@gmx.net>
|
2011-01-24 13:35:09 +00:00
|
|
|
* - Enabled hardware flow control before displaying /etc/issue
|
|
|
|
*
|
|
|
|
* 2011-01 Venys Vlasenko
|
|
|
|
* - Removed parity detection code. It can't work reliably:
|
|
|
|
* if all chars received have bit 7 cleared and odd (or even) parity,
|
|
|
|
* it is impossible to determine whether other side is 8-bit,no-parity
|
|
|
|
* or 7-bit,odd(even)-parity. It also interferes with non-ASCII usernames.
|
|
|
|
* - From now on, we assume that parity is correctly set.
|
2006-07-12 07:56:04 +00:00
|
|
|
*
|
2010-08-16 18:14:46 +00:00
|
|
|
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
|
2006-07-12 07:56:04 +00:00
|
|
|
*/
|
2002-06-04 20:45:46 +00:00
|
|
|
|
2007-05-26 19:00:18 +00:00
|
|
|
#include "libbb.h"
|
2006-09-19 13:50:55 +00:00
|
|
|
#include <syslog.h>
|
2009-07-05 01:34:12 +00:00
|
|
|
#ifndef IUCLC
|
|
|
|
# define IUCLC 0
|
|
|
|
#endif
|
|
|
|
|
2011-01-24 13:35:09 +00:00
|
|
|
#ifndef LOGIN_PROCESS
|
2011-01-09 20:44:51 +00:00
|
|
|
# undef ENABLE_FEATURE_UTMP
|
|
|
|
# undef ENABLE_FEATURE_WTMP
|
|
|
|
# define ENABLE_FEATURE_UTMP 0
|
|
|
|
# define ENABLE_FEATURE_WTMP 0
|
2011-01-24 03:43:04 +00:00
|
|
|
#endif
|
2006-10-23 02:11:22 +00:00
|
|
|
|
2011-01-09 20:44:51 +00:00
|
|
|
|
2011-01-24 13:35:09 +00:00
|
|
|
/* The following is used for understandable diagnostics */
|
2011-01-09 20:44:51 +00:00
|
|
|
#ifdef DEBUGGING
|
|
|
|
static FILE *dbf;
|
|
|
|
# define DEBUGTERM "/dev/ttyp0"
|
|
|
|
# define debug(...) do { fprintf(dbf, __VA_ARGS__); fflush(dbf); } while (0)
|
|
|
|
#else
|
|
|
|
# define debug(...) ((void)0)
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
2006-11-07 01:52:10 +00:00
|
|
|
/*
|
|
|
|
* Things you may want to modify.
|
|
|
|
*
|
|
|
|
* You may disagree with the default line-editing etc. characters defined
|
|
|
|
* below. Note, however, that DEL cannot be used for interrupt generation
|
|
|
|
* and for line editing at the same time.
|
|
|
|
*/
|
2011-01-09 20:44:51 +00:00
|
|
|
#undef _PATH_LOGIN
|
2006-11-07 01:52:10 +00:00
|
|
|
#define _PATH_LOGIN "/bin/login"
|
2002-06-04 20:45:46 +00:00
|
|
|
|
2011-01-09 20:44:51 +00:00
|
|
|
/* Displayed before the login prompt.
|
|
|
|
* If ISSUE is not defined, getty will never display the contents of the
|
2006-11-07 01:52:10 +00:00
|
|
|
* /etc/issue file. You will not want to spit out large "issue" files at the
|
|
|
|
* wrong baud rate.
|
|
|
|
*/
|
2011-01-09 20:44:51 +00:00
|
|
|
#define ISSUE "/etc/issue"
|
2005-07-27 06:05:38 +00:00
|
|
|
|
2011-10-23 21:58:59 +00:00
|
|
|
/* Macro to build Ctrl-LETTER. Assumes ASCII dialect */
|
|
|
|
#define CTL(x) ((x) ^ 0100)
|
2002-06-04 20:45:46 +00:00
|
|
|
|
2006-11-07 01:52:10 +00:00
|
|
|
/*
|
2011-01-24 13:35:09 +00:00
|
|
|
* When multiple baud rates are specified on the command line,
|
|
|
|
* the first one we will try is the first one specified.
|
2006-11-07 01:52:10 +00:00
|
|
|
*/
|
2005-09-29 11:31:26 +00:00
|
|
|
#define MAX_SPEED 10 /* max. nr. of baud rates */
|
2002-06-04 20:45:46 +00:00
|
|
|
|
2011-01-24 03:43:04 +00:00
|
|
|
struct globals {
|
2011-10-22 04:27:41 +00:00
|
|
|
unsigned timeout;
|
2007-12-04 09:48:40 +00:00
|
|
|
const char *login; /* login program */
|
2011-01-24 13:35:09 +00:00
|
|
|
const char *fakehost;
|
2011-10-22 04:27:41 +00:00
|
|
|
const char *tty_name;
|
2011-03-06 22:09:42 +00:00
|
|
|
char *initstring; /* modem init string */
|
2007-12-04 09:48:40 +00:00
|
|
|
const char *issue; /* alternative issue file */
|
2005-09-29 11:31:26 +00:00
|
|
|
int numspeed; /* number of baud rates to try */
|
|
|
|
int speeds[MAX_SPEED]; /* baud rates to be tried */
|
2011-01-24 13:35:09 +00:00
|
|
|
unsigned char eol; /* end-of-line char seen (CR or NL) */
|
2011-10-22 04:27:41 +00:00
|
|
|
struct termios tty_attrs;
|
2011-01-24 03:43:04 +00:00
|
|
|
char line_buf[128];
|
2002-06-04 20:45:46 +00:00
|
|
|
};
|
|
|
|
|
2011-01-24 03:43:04 +00:00
|
|
|
#define G (*ptr_to_globals)
|
|
|
|
#define INIT_G() do { \
|
|
|
|
SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
|
|
|
|
} while (0)
|
2002-06-04 20:45:46 +00:00
|
|
|
|
2011-01-09 20:44:51 +00:00
|
|
|
//usage:#define getty_trivial_usage
|
2011-01-22 02:06:40 +00:00
|
|
|
//usage: "[OPTIONS] BAUD_RATE[,BAUD_RATE]... TTY [TERMTYPE]"
|
2011-01-09 20:44:51 +00:00
|
|
|
//usage:#define getty_full_usage "\n\n"
|
2011-10-22 01:16:23 +00:00
|
|
|
//usage: "Open TTY, prompt for login name, then invoke /bin/login\n"
|
2011-01-26 02:26:38 +00:00
|
|
|
//usage: "\n -h Enable hardware RTS/CTS flow control"
|
|
|
|
//usage: "\n -L Set CLOCAL (ignore Carrier Detect state)"
|
2011-01-09 20:44:51 +00:00
|
|
|
//usage: "\n -m Get baud rate from modem's CONNECT status message"
|
2011-01-26 02:26:38 +00:00
|
|
|
//usage: "\n -n Don't prompt for login name"
|
2011-01-22 02:06:40 +00:00
|
|
|
//usage: "\n -w Wait for CR or LF before sending /etc/issue"
|
2011-01-26 02:26:38 +00:00
|
|
|
//usage: "\n -i Don't display /etc/issue"
|
2011-01-09 20:44:51 +00:00
|
|
|
//usage: "\n -f ISSUE_FILE Display ISSUE_FILE instead of /etc/issue"
|
|
|
|
//usage: "\n -l LOGIN Invoke LOGIN instead of /bin/login"
|
2011-01-26 02:26:38 +00:00
|
|
|
//usage: "\n -t SEC Terminate after SEC if no login name is read"
|
2011-01-09 20:44:51 +00:00
|
|
|
//usage: "\n -I INITSTR Send INITSTR before anything else"
|
|
|
|
//usage: "\n -H HOST Log HOST into the utmp file as the hostname"
|
2011-01-22 02:06:40 +00:00
|
|
|
//usage: "\n"
|
|
|
|
//usage: "\nBAUD_RATE of 0 leaves it unchanged"
|
2011-01-09 20:44:51 +00:00
|
|
|
|
|
|
|
static const char opt_string[] ALIGN1 = "I:LH:f:hil:mt:wn";
|
|
|
|
#define F_INITSTRING (1 << 0) /* -I */
|
|
|
|
#define F_LOCAL (1 << 1) /* -L */
|
|
|
|
#define F_FAKEHOST (1 << 2) /* -H */
|
|
|
|
#define F_CUSTISSUE (1 << 3) /* -f */
|
|
|
|
#define F_RTSCTS (1 << 4) /* -h */
|
|
|
|
#define F_NOISSUE (1 << 5) /* -i */
|
|
|
|
#define F_LOGIN (1 << 6) /* -l */
|
|
|
|
#define F_PARSE (1 << 7) /* -m */
|
|
|
|
#define F_TIMEOUT (1 << 8) /* -t */
|
|
|
|
#define F_WAITCRLF (1 << 9) /* -w */
|
|
|
|
#define F_NOPROMPT (1 << 10) /* -n */
|
2002-06-04 20:45:46 +00:00
|
|
|
|
|
|
|
|
2011-01-23 23:16:50 +00:00
|
|
|
/* convert speed string to speed code; return <= 0 on failure */
|
2006-06-16 16:37:07 +00:00
|
|
|
static int bcode(const char *s)
|
|
|
|
{
|
2008-03-17 08:55:44 +00:00
|
|
|
int value = bb_strtou(s, NULL, 10); /* yes, int is intended! */
|
|
|
|
if (value < 0) /* bad terminating char, overflow, etc */
|
|
|
|
return value;
|
|
|
|
return tty_value_to_baud(value);
|
2006-06-16 16:37:07 +00:00
|
|
|
}
|
2002-06-04 20:45:46 +00:00
|
|
|
|
2011-01-23 23:16:50 +00:00
|
|
|
/* parse alternate baud rates */
|
2011-01-24 03:43:04 +00:00
|
|
|
static void parse_speeds(char *arg)
|
2006-06-16 16:37:07 +00:00
|
|
|
{
|
|
|
|
char *cp;
|
2002-06-04 20:45:46 +00:00
|
|
|
|
2007-12-04 09:48:40 +00:00
|
|
|
/* NB: at least one iteration is always done */
|
2006-06-16 16:37:07 +00:00
|
|
|
debug("entered parse_speeds\n");
|
2007-12-04 09:48:40 +00:00
|
|
|
while ((cp = strsep(&arg, ",")) != NULL) {
|
2011-01-24 03:43:04 +00:00
|
|
|
G.speeds[G.numspeed] = bcode(cp);
|
|
|
|
if (G.speeds[G.numspeed] < 0)
|
2006-09-07 16:20:03 +00:00
|
|
|
bb_error_msg_and_die("bad speed: %s", cp);
|
2009-04-12 13:05:40 +00:00
|
|
|
/* note: arg "0" turns into speed B0 */
|
2011-01-24 03:43:04 +00:00
|
|
|
G.numspeed++;
|
|
|
|
if (G.numspeed > MAX_SPEED)
|
2006-09-07 16:20:03 +00:00
|
|
|
bb_error_msg_and_die("too many alternate speeds");
|
2002-06-04 20:45:46 +00:00
|
|
|
}
|
2007-12-04 09:48:40 +00:00
|
|
|
debug("exiting parse_speeds\n");
|
2002-06-04 20:45:46 +00:00
|
|
|
}
|
|
|
|
|
2011-01-23 23:16:50 +00:00
|
|
|
/* parse command-line arguments */
|
2011-01-24 13:35:09 +00:00
|
|
|
static void parse_args(char **argv)
|
2002-06-04 20:45:46 +00:00
|
|
|
{
|
2005-09-29 11:31:26 +00:00
|
|
|
char *ts;
|
2011-01-09 20:44:51 +00:00
|
|
|
int flags;
|
2005-09-29 11:31:26 +00:00
|
|
|
|
2008-03-17 08:55:44 +00:00
|
|
|
opt_complementary = "-2:t+"; /* at least 2 args; -t N */
|
2011-01-09 20:44:51 +00:00
|
|
|
flags = getopt32(argv, opt_string,
|
2011-01-24 13:35:09 +00:00
|
|
|
&G.initstring, &G.fakehost, &G.issue,
|
2011-01-24 03:43:04 +00:00
|
|
|
&G.login, &G.timeout
|
|
|
|
);
|
2011-01-09 20:44:51 +00:00
|
|
|
if (flags & F_INITSTRING) {
|
2011-01-24 03:43:04 +00:00
|
|
|
G.initstring = xstrdup(G.initstring);
|
2010-10-23 19:06:06 +00:00
|
|
|
/* decode \ddd octal codes into chars */
|
2011-03-06 22:09:42 +00:00
|
|
|
strcpy_and_process_escape_sequences(G.initstring, G.initstring);
|
2005-09-29 11:31:26 +00:00
|
|
|
}
|
2011-01-09 20:44:51 +00:00
|
|
|
argv += optind;
|
2007-12-04 09:48:40 +00:00
|
|
|
debug("after getopt\n");
|
2002-06-04 20:45:46 +00:00
|
|
|
|
2011-01-24 03:43:04 +00:00
|
|
|
/* We loosen up a bit and accept both "baudrate tty" and "tty baudrate" */
|
2011-10-22 04:27:41 +00:00
|
|
|
G.tty_name = argv[0];
|
|
|
|
ts = argv[1]; /* baud rate(s) */
|
2007-01-19 21:19:35 +00:00
|
|
|
if (isdigit(argv[0][0])) {
|
2011-01-24 03:43:04 +00:00
|
|
|
/* A number first, assume it's a speed (BSD style) */
|
2011-10-22 04:27:41 +00:00
|
|
|
G.tty_name = ts; /* tty name is in argv[1] */
|
|
|
|
ts = argv[0]; /* baud rate(s) */
|
2002-06-04 20:45:46 +00:00
|
|
|
}
|
2011-01-24 03:43:04 +00:00
|
|
|
parse_speeds(ts);
|
2008-03-17 08:55:44 +00:00
|
|
|
|
2006-10-23 02:11:22 +00:00
|
|
|
if (argv[2])
|
2008-03-17 08:55:44 +00:00
|
|
|
xsetenv("TERM", argv[2]);
|
2002-06-04 20:45:46 +00:00
|
|
|
|
2007-12-04 09:48:40 +00:00
|
|
|
debug("exiting parse_args\n");
|
2002-06-04 20:45:46 +00:00
|
|
|
}
|
|
|
|
|
2011-01-23 23:16:50 +00:00
|
|
|
/* set up tty as standard input, output, error */
|
2011-01-24 03:43:04 +00:00
|
|
|
static void open_tty(void)
|
2002-06-04 20:45:46 +00:00
|
|
|
{
|
2011-01-24 13:35:09 +00:00
|
|
|
/* Set up new standard input, unless we are given an already opened port */
|
2011-10-22 04:27:41 +00:00
|
|
|
if (NOT_LONE_DASH(G.tty_name)) {
|
|
|
|
if (G.tty_name[0] != '/')
|
|
|
|
G.tty_name = xasprintf("/dev/%s", G.tty_name); /* will leak it */
|
2002-06-04 20:45:46 +00:00
|
|
|
|
2011-01-24 13:35:09 +00:00
|
|
|
/* Open the tty as standard input */
|
2002-06-04 20:45:46 +00:00
|
|
|
debug("open(2)\n");
|
2008-03-17 08:55:44 +00:00
|
|
|
close(0);
|
2011-10-22 04:27:41 +00:00
|
|
|
xopen(G.tty_name, O_RDWR | O_NONBLOCK); /* uses fd 0 */
|
2007-12-04 09:48:40 +00:00
|
|
|
|
2011-01-24 13:35:09 +00:00
|
|
|
/* Set proper protections and ownership */
|
2007-12-04 09:48:40 +00:00
|
|
|
fchown(0, 0, 0); /* 0:0 */
|
2008-03-17 08:55:44 +00:00
|
|
|
fchmod(0, 0620); /* crw--w---- */
|
2002-06-04 20:45:46 +00:00
|
|
|
} else {
|
2011-10-22 04:27:41 +00:00
|
|
|
char *n;
|
2002-06-04 20:45:46 +00:00
|
|
|
/*
|
2011-10-22 04:27:41 +00:00
|
|
|
* Standard input should already be connected to an open port.
|
|
|
|
* Make sure it is open for read/write.
|
2002-06-04 20:45:46 +00:00
|
|
|
*/
|
2011-01-22 16:29:53 +00:00
|
|
|
if ((fcntl(0, F_GETFL) & (O_RDWR|O_RDONLY|O_WRONLY)) != O_RDWR)
|
2007-01-27 22:21:12 +00:00
|
|
|
bb_error_msg_and_die("stdin is not open for read/write");
|
2011-10-22 04:27:41 +00:00
|
|
|
|
|
|
|
/* Try to get real tty name instead of "-" */
|
|
|
|
n = xmalloc_ttyname(0);
|
|
|
|
if (n)
|
|
|
|
G.tty_name = n;
|
2002-06-04 20:45:46 +00:00
|
|
|
}
|
2011-10-22 04:27:41 +00:00
|
|
|
applet_name = xasprintf("getty: %s", skip_dev_pfx(G.tty_name));
|
2002-06-04 20:45:46 +00:00
|
|
|
}
|
|
|
|
|
2011-10-22 04:27:41 +00:00
|
|
|
static void set_tty_attrs(void)
|
2011-01-26 14:15:19 +00:00
|
|
|
{
|
2011-10-22 04:27:41 +00:00
|
|
|
if (tcsetattr_stdin_TCSANOW(&G.tty_attrs) < 0)
|
2011-01-26 14:15:19 +00:00
|
|
|
bb_perror_msg_and_die("tcsetattr");
|
|
|
|
}
|
|
|
|
|
2011-10-22 04:27:41 +00:00
|
|
|
/* We manipulate tty_attrs this way:
|
|
|
|
* - first, we read existing tty_attrs
|
|
|
|
* - init_tty_attrs modifies some parts and sets it
|
|
|
|
* - auto_baud and/or BREAK processing can set different speed and set tty attrs
|
|
|
|
* - finalize_tty_attrs again modifies some parts and sets tty attrs before
|
2011-01-24 13:35:09 +00:00
|
|
|
* execing login
|
|
|
|
*/
|
2011-10-22 04:27:41 +00:00
|
|
|
static void init_tty_attrs(int speed)
|
2002-06-04 20:45:46 +00:00
|
|
|
{
|
2011-01-26 14:15:19 +00:00
|
|
|
/* Try to drain output buffer, with 5 sec timeout.
|
|
|
|
* Added on request from users of ~600 baud serial interface
|
|
|
|
* with biggish buffer on a 90MHz CPU.
|
|
|
|
* They were losing hundreds of bytes of buffered output
|
|
|
|
* on tcflush.
|
2011-01-23 23:28:43 +00:00
|
|
|
*/
|
2011-01-26 14:15:19 +00:00
|
|
|
signal_no_SA_RESTART_empty_mask(SIGALRM, record_signo);
|
|
|
|
alarm(5);
|
|
|
|
tcdrain(STDIN_FILENO);
|
|
|
|
alarm(0);
|
|
|
|
|
|
|
|
/* Flush input and output queues, important for modems! */
|
2011-01-23 23:28:43 +00:00
|
|
|
tcflush(STDIN_FILENO, TCIOFLUSH);
|
2011-01-22 02:06:40 +00:00
|
|
|
|
2011-01-24 13:35:09 +00:00
|
|
|
/* Set speed if it wasn't specified as "0" on command line */
|
2011-01-23 23:16:50 +00:00
|
|
|
if (speed != B0)
|
2011-10-22 04:27:41 +00:00
|
|
|
cfsetspeed(&G.tty_attrs, speed);
|
2011-01-23 23:16:50 +00:00
|
|
|
|
2011-10-22 04:27:41 +00:00
|
|
|
/* Initial settings: 8-bit characters, raw mode, blocking i/o.
|
2002-06-04 20:45:46 +00:00
|
|
|
* Special characters are set after we have read the login name; all
|
2011-01-26 14:56:51 +00:00
|
|
|
* reads will be done in raw mode anyway.
|
2002-06-04 20:45:46 +00:00
|
|
|
*/
|
2011-01-26 14:56:51 +00:00
|
|
|
/* Clear all bits except: */
|
2011-10-22 04:27:41 +00:00
|
|
|
G.tty_attrs.c_cflag &= (0
|
2011-01-26 14:56:51 +00:00
|
|
|
/* 2 stop bits (1 otherwise)
|
|
|
|
* Enable parity bit (both on input and output)
|
|
|
|
* Odd parity (else even)
|
|
|
|
*/
|
|
|
|
| CSTOPB | PARENB | PARODD
|
2011-01-26 15:20:54 +00:00
|
|
|
#ifdef CMSPAR
|
2011-01-26 14:56:51 +00:00
|
|
|
| CMSPAR /* mark or space parity */
|
|
|
|
#endif
|
2011-10-30 20:27:33 +00:00
|
|
|
#ifdef CBAUD
|
2011-01-26 14:56:51 +00:00
|
|
|
| CBAUD /* (output) baud rate */
|
2011-10-30 20:27:33 +00:00
|
|
|
#endif
|
2011-01-26 14:56:51 +00:00
|
|
|
#ifdef CBAUDEX
|
|
|
|
| CBAUDEX /* (output) baud rate */
|
|
|
|
#endif
|
|
|
|
#ifdef CIBAUD
|
|
|
|
| CIBAUD /* input baud rate */
|
|
|
|
#endif
|
|
|
|
);
|
|
|
|
/* Set: 8 bits; hang up (drop DTR) on last close; enable receive */
|
2011-10-22 04:27:41 +00:00
|
|
|
G.tty_attrs.c_cflag |= CS8 | HUPCL | CREAD;
|
2011-01-26 02:26:38 +00:00
|
|
|
if (option_mask32 & F_LOCAL) {
|
|
|
|
/* ignore Carrier Detect pin:
|
|
|
|
* opens don't block when CD is low,
|
|
|
|
* losing CD doesn't hang up processes whose ctty is this tty
|
|
|
|
*/
|
2011-10-22 04:27:41 +00:00
|
|
|
G.tty_attrs.c_cflag |= CLOCAL;
|
2011-01-26 02:26:38 +00:00
|
|
|
}
|
|
|
|
#ifdef CRTSCTS
|
|
|
|
if (option_mask32 & F_RTSCTS)
|
2011-10-22 04:27:41 +00:00
|
|
|
G.tty_attrs.c_cflag |= CRTSCTS; /* flow control using RTS/CTS pins */
|
2011-01-26 02:26:38 +00:00
|
|
|
#endif
|
2011-10-22 04:27:41 +00:00
|
|
|
G.tty_attrs.c_iflag = 0;
|
|
|
|
G.tty_attrs.c_lflag = 0;
|
2011-01-26 02:26:38 +00:00
|
|
|
/* non-raw output; add CR to each NL */
|
2011-10-22 04:27:41 +00:00
|
|
|
G.tty_attrs.c_oflag = OPOST | ONLCR;
|
2011-01-26 10:28:43 +00:00
|
|
|
|
2012-01-15 22:00:13 +00:00
|
|
|
/* reads would block only if < 1 char is available */
|
|
|
|
G.tty_attrs.c_cc[VMIN] = 1;
|
|
|
|
/* no timeout (reads block forever) */
|
|
|
|
G.tty_attrs.c_cc[VTIME] = 0;
|
2010-05-27 13:37:32 +00:00
|
|
|
#ifdef __linux__
|
2011-10-22 04:27:41 +00:00
|
|
|
G.tty_attrs.c_line = 0;
|
2010-05-27 13:37:32 +00:00
|
|
|
#endif
|
2002-06-04 20:45:46 +00:00
|
|
|
|
2011-10-22 04:27:41 +00:00
|
|
|
set_tty_attrs();
|
2002-06-04 20:45:46 +00:00
|
|
|
|
|
|
|
debug("term_io 2\n");
|
|
|
|
}
|
|
|
|
|
2011-10-22 04:27:41 +00:00
|
|
|
static void finalize_tty_attrs(void)
|
2011-01-24 13:35:09 +00:00
|
|
|
{
|
2011-01-26 10:28:43 +00:00
|
|
|
/* software flow control on output (stop sending if XOFF is recvd);
|
|
|
|
* and on input (send XOFF when buffer is full)
|
|
|
|
*/
|
2011-10-22 04:27:41 +00:00
|
|
|
G.tty_attrs.c_iflag |= IXON | IXOFF;
|
2011-01-26 02:26:38 +00:00
|
|
|
if (G.eol == '\r') {
|
2011-10-22 04:27:41 +00:00
|
|
|
G.tty_attrs.c_iflag |= ICRNL; /* map CR on input to NL */
|
2011-01-26 02:26:38 +00:00
|
|
|
}
|
2011-01-26 10:28:43 +00:00
|
|
|
/* Other bits in c_iflag:
|
|
|
|
* IXANY Any recvd char enables output (any char is also a XON)
|
|
|
|
* INPCK Enable parity check
|
|
|
|
* IGNPAR Ignore parity errors (drop bad bytes)
|
|
|
|
* PARMRK Mark parity errors with 0xff, 0x00 prefix
|
|
|
|
* (else bad byte is received as 0x00)
|
|
|
|
* ISTRIP Strip parity bit
|
|
|
|
* IGNBRK Ignore break condition
|
|
|
|
* BRKINT Send SIGINT on break - maybe set this?
|
|
|
|
* INLCR Map NL to CR
|
|
|
|
* IGNCR Ignore CR
|
|
|
|
* ICRNL Map CR to NL
|
|
|
|
* IUCLC Map uppercase to lowercase
|
|
|
|
* IMAXBEL Echo BEL on input line too long
|
2011-01-26 14:15:19 +00:00
|
|
|
* IUTF8 Appears to affect tty's idea of char widths,
|
|
|
|
* observed to improve backspacing through Unicode chars
|
2011-02-02 23:05:48 +00:00
|
|
|
*/
|
2011-01-26 10:28:43 +00:00
|
|
|
|
2014-10-02 11:45:21 +00:00
|
|
|
/* ICANON line buffered input (NL or EOL or EOF chars end a line);
|
|
|
|
* ISIG recognize INT/QUIT/SUSP chars;
|
|
|
|
* ECHO echo input chars;
|
|
|
|
* ECHOE echo BS-SP-BS on erase character;
|
|
|
|
* ECHOK echo kill char specially, not as ^c (ECHOKE controls how exactly);
|
|
|
|
* ECHOKE erase all input via BS-SP-BS on kill char (else go to next line)
|
|
|
|
* ECHOCTL Echo ctrl chars as ^c (else echo verbatim:
|
|
|
|
* e.g. up arrow emits "ESC-something" and thus moves cursor up!)
|
2011-01-26 10:28:43 +00:00
|
|
|
*/
|
2014-10-02 11:45:21 +00:00
|
|
|
G.tty_attrs.c_lflag |= ICANON | ISIG | ECHO | ECHOE | ECHOK | ECHOKE | ECHOCTL;
|
2011-01-26 10:28:43 +00:00
|
|
|
/* Other bits in c_lflag:
|
|
|
|
* XCASE Map uppercase to \lowercase [tried, doesn't work]
|
|
|
|
* ECHONL Echo NL even if ECHO is not set
|
2011-01-26 14:15:19 +00:00
|
|
|
* ECHOPRT On erase, echo erased chars
|
|
|
|
* [qwe<BS><BS><BS> input looks like "qwe\ewq/" on screen]
|
2011-01-26 10:28:43 +00:00
|
|
|
* NOFLSH Don't flush input buffer after interrupt or quit chars
|
|
|
|
* IEXTEN Enable extended functions (??)
|
|
|
|
* [glibc says it enables c_cc[LNEXT] "enter literal char"
|
|
|
|
* and c_cc[VDISCARD] "toggle discard buffered output" chars]
|
|
|
|
* FLUSHO Output being flushed (c_cc[VDISCARD] is in effect)
|
|
|
|
* PENDIN Retype pending input at next read or input char
|
2011-01-26 14:15:19 +00:00
|
|
|
* (c_cc[VREPRINT] is being processed)
|
2011-01-26 10:28:43 +00:00
|
|
|
* TOSTOP Send SIGTTOU for background output
|
|
|
|
* (why "stty sane" unsets this bit?)
|
|
|
|
*/
|
2011-01-26 02:26:38 +00:00
|
|
|
|
2011-10-23 21:58:59 +00:00
|
|
|
G.tty_attrs.c_cc[VINTR] = CTL('C');
|
|
|
|
G.tty_attrs.c_cc[VQUIT] = CTL('\\');
|
|
|
|
G.tty_attrs.c_cc[VEOF] = CTL('D');
|
|
|
|
G.tty_attrs.c_cc[VEOL] = '\n';
|
2011-01-24 13:35:09 +00:00
|
|
|
#ifdef VSWTC
|
2011-10-23 21:58:59 +00:00
|
|
|
G.tty_attrs.c_cc[VSWTC] = 0;
|
2011-01-24 13:35:09 +00:00
|
|
|
#endif
|
2011-01-24 17:17:19 +00:00
|
|
|
#ifdef VSWTCH
|
2011-10-23 21:58:59 +00:00
|
|
|
G.tty_attrs.c_cc[VSWTCH] = 0;
|
2011-01-24 17:17:19 +00:00
|
|
|
#endif
|
2011-10-23 21:58:59 +00:00
|
|
|
G.tty_attrs.c_cc[VKILL] = CTL('U');
|
2011-01-26 10:28:43 +00:00
|
|
|
/* Other control chars:
|
|
|
|
* VEOL2
|
|
|
|
* VERASE, VWERASE - (word) erase. we may set VERASE in get_logname
|
|
|
|
* VREPRINT - reprint current input buffer
|
|
|
|
* VLNEXT, VDISCARD, VSTATUS
|
|
|
|
* VSUSP, VDSUSP - send (delayed) SIGTSTP
|
|
|
|
* VSTART, VSTOP - chars used for IXON/IXOFF
|
|
|
|
*/
|
2011-01-24 13:35:09 +00:00
|
|
|
|
2011-10-22 04:27:41 +00:00
|
|
|
set_tty_attrs();
|
2011-10-23 21:58:59 +00:00
|
|
|
|
|
|
|
/* Now the newline character should be properly written */
|
|
|
|
full_write(STDOUT_FILENO, "\n", 1);
|
2011-01-24 13:35:09 +00:00
|
|
|
}
|
|
|
|
|
2011-01-23 23:16:50 +00:00
|
|
|
/* extract baud rate from modem status message */
|
2011-01-24 03:43:04 +00:00
|
|
|
static void auto_baud(void)
|
2002-06-04 20:45:46 +00:00
|
|
|
{
|
|
|
|
int nread;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* This works only if the modem produces its status code AFTER raising
|
|
|
|
* the DCD line, and if the computer is fast enough to set the proper
|
|
|
|
* baud rate before the message has gone by. We expect a message of the
|
|
|
|
* following format:
|
2004-03-15 08:29:22 +00:00
|
|
|
*
|
2002-06-04 20:45:46 +00:00
|
|
|
* <junk><number><junk>
|
2004-03-15 08:29:22 +00:00
|
|
|
*
|
2002-06-04 20:45:46 +00:00
|
|
|
* The number is interpreted as the baud rate of the incoming call. If the
|
|
|
|
* modem does not tell us the baud rate within one second, we will keep
|
|
|
|
* using the current baud rate. It is advisable to enable BREAK
|
|
|
|
* processing (comma-separated list of baud rates) if the processing of
|
|
|
|
* modem status messages is enabled.
|
|
|
|
*/
|
|
|
|
|
2011-10-22 04:27:41 +00:00
|
|
|
G.tty_attrs.c_cc[VMIN] = 0; /* don't block reads (min read is 0 chars) */
|
|
|
|
set_tty_attrs();
|
2002-06-04 20:45:46 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Wait for a while, then read everything the modem has said so far and
|
|
|
|
* try to extract the speed of the dial-in call.
|
|
|
|
*/
|
2006-10-23 02:11:22 +00:00
|
|
|
sleep(1);
|
2011-01-24 03:43:04 +00:00
|
|
|
nread = safe_read(STDIN_FILENO, G.line_buf, sizeof(G.line_buf) - 1);
|
2006-10-23 02:10:45 +00:00
|
|
|
if (nread > 0) {
|
2011-01-24 13:35:09 +00:00
|
|
|
int speed;
|
|
|
|
char *bp;
|
2011-01-24 03:43:04 +00:00
|
|
|
G.line_buf[nread] = '\0';
|
|
|
|
for (bp = G.line_buf; bp < G.line_buf + nread; bp++) {
|
2007-12-04 09:48:40 +00:00
|
|
|
if (isdigit(*bp)) {
|
2006-10-08 12:49:22 +00:00
|
|
|
speed = bcode(bp);
|
2010-05-27 13:37:32 +00:00
|
|
|
if (speed > 0)
|
2011-10-22 04:27:41 +00:00
|
|
|
cfsetspeed(&G.tty_attrs, speed);
|
2002-06-04 20:45:46 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2011-01-26 14:56:51 +00:00
|
|
|
/* Restore terminal settings */
|
2011-10-22 04:27:41 +00:00
|
|
|
G.tty_attrs.c_cc[VMIN] = 1; /* restore to value set by init_tty_attrs */
|
|
|
|
set_tty_attrs();
|
2006-06-16 16:37:07 +00:00
|
|
|
}
|
|
|
|
|
2011-01-23 23:16:50 +00:00
|
|
|
/* get user name, establish parity, speed, erase, kill, eol;
|
2011-01-24 13:35:09 +00:00
|
|
|
* return NULL on BREAK, logname on success
|
|
|
|
*/
|
2011-01-24 03:43:04 +00:00
|
|
|
static char *get_logname(void)
|
2002-06-04 20:45:46 +00:00
|
|
|
{
|
|
|
|
char *bp;
|
2011-01-24 03:43:04 +00:00
|
|
|
char c;
|
2002-06-04 20:45:46 +00:00
|
|
|
|
2011-01-24 13:35:09 +00:00
|
|
|
/* Flush pending input (esp. after parsing or switching the baud rate) */
|
2011-01-23 23:28:43 +00:00
|
|
|
usleep(100*1000); /* 0.1 sec */
|
2011-01-24 22:45:22 +00:00
|
|
|
tcflush(STDIN_FILENO, TCIFLUSH);
|
2002-06-04 20:45:46 +00:00
|
|
|
|
2011-01-24 13:35:09 +00:00
|
|
|
/* Prompt for and read a login name */
|
2011-10-23 21:58:59 +00:00
|
|
|
do {
|
2011-01-24 13:35:09 +00:00
|
|
|
/* Write issue file and prompt */
|
2011-01-23 23:16:50 +00:00
|
|
|
#ifdef ISSUE
|
|
|
|
if (!(option_mask32 & F_NOISSUE))
|
2011-10-22 04:27:41 +00:00
|
|
|
print_login_issue(G.issue, G.tty_name);
|
2011-01-23 23:16:50 +00:00
|
|
|
#endif
|
|
|
|
print_login_prompt();
|
2002-06-04 20:45:46 +00:00
|
|
|
|
2011-10-23 21:58:59 +00:00
|
|
|
/* Read name, watch for break, erase, kill, end-of-line */
|
2011-01-24 03:43:04 +00:00
|
|
|
bp = G.line_buf;
|
2011-01-22 02:06:40 +00:00
|
|
|
while (1) {
|
2011-01-24 13:35:09 +00:00
|
|
|
/* Do not report trivial EINTR/EIO errors */
|
2010-05-22 19:17:46 +00:00
|
|
|
errno = EINTR; /* make read of 0 bytes be silent too */
|
2008-05-19 09:48:17 +00:00
|
|
|
if (read(STDIN_FILENO, &c, 1) < 1) {
|
2011-10-23 16:05:58 +00:00
|
|
|
finalize_tty_attrs();
|
2002-06-04 20:45:46 +00:00
|
|
|
if (errno == EINTR || errno == EIO)
|
2008-05-19 09:29:47 +00:00
|
|
|
exit(EXIT_SUCCESS);
|
2010-09-01 09:31:43 +00:00
|
|
|
bb_perror_msg_and_die(bb_msg_read_error);
|
2002-06-04 20:45:46 +00:00
|
|
|
}
|
|
|
|
|
2011-01-24 03:43:04 +00:00
|
|
|
switch (c) {
|
2011-01-24 17:17:19 +00:00
|
|
|
case '\r':
|
|
|
|
case '\n':
|
2011-01-24 03:43:04 +00:00
|
|
|
*bp = '\0';
|
|
|
|
G.eol = c;
|
2011-01-22 02:06:40 +00:00
|
|
|
goto got_logname;
|
2011-10-23 21:58:59 +00:00
|
|
|
case CTL('H'):
|
|
|
|
case 0x7f:
|
2011-10-22 04:27:41 +00:00
|
|
|
G.tty_attrs.c_cc[VERASE] = c;
|
2011-01-24 03:43:04 +00:00
|
|
|
if (bp > G.line_buf) {
|
2011-01-22 02:06:40 +00:00
|
|
|
full_write(STDOUT_FILENO, "\010 \010", 3);
|
2002-06-04 20:45:46 +00:00
|
|
|
bp--;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case CTL('U'):
|
2011-01-24 03:43:04 +00:00
|
|
|
while (bp > G.line_buf) {
|
2011-01-22 02:06:40 +00:00
|
|
|
full_write(STDOUT_FILENO, "\010 \010", 3);
|
2002-06-04 20:45:46 +00:00
|
|
|
bp--;
|
|
|
|
}
|
|
|
|
break;
|
2011-10-23 21:58:59 +00:00
|
|
|
case CTL('C'):
|
2002-06-04 20:45:46 +00:00
|
|
|
case CTL('D'):
|
2011-10-23 16:05:58 +00:00
|
|
|
finalize_tty_attrs();
|
2008-05-19 09:29:47 +00:00
|
|
|
exit(EXIT_SUCCESS);
|
2011-10-23 21:58:59 +00:00
|
|
|
case '\0':
|
|
|
|
/* BREAK. If we have speeds to try,
|
|
|
|
* return NULL (will switch speeds and return here) */
|
|
|
|
if (G.numspeed > 1)
|
|
|
|
return NULL;
|
|
|
|
/* fall through and ignore it */
|
2002-06-04 20:45:46 +00:00
|
|
|
default:
|
2011-01-24 03:43:04 +00:00
|
|
|
if ((unsigned char)c < ' ') {
|
2006-10-23 22:43:02 +00:00
|
|
|
/* ignore garbage characters */
|
2011-01-24 03:43:04 +00:00
|
|
|
} else if ((int)(bp - G.line_buf) < sizeof(G.line_buf) - 1) {
|
|
|
|
/* echo and store the character */
|
|
|
|
full_write(STDOUT_FILENO, &c, 1);
|
|
|
|
*bp++ = c;
|
2002-06-04 20:45:46 +00:00
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
2011-01-22 02:06:40 +00:00
|
|
|
} /* end of get char loop */
|
|
|
|
got_logname: ;
|
2011-10-23 21:58:59 +00:00
|
|
|
} while (G.line_buf[0] == '\0'); /* while logname is empty */
|
2002-06-04 20:45:46 +00:00
|
|
|
|
2011-01-24 03:43:04 +00:00
|
|
|
return G.line_buf;
|
2002-06-04 20:45:46 +00:00
|
|
|
}
|
|
|
|
|
2011-10-22 04:27:41 +00:00
|
|
|
static void alarm_handler(int sig UNUSED_PARAM)
|
|
|
|
{
|
|
|
|
finalize_tty_attrs();
|
|
|
|
_exit(EXIT_SUCCESS);
|
|
|
|
}
|
|
|
|
|
2015-10-09 14:42:57 +00:00
|
|
|
static void sleep10(void)
|
|
|
|
{
|
|
|
|
sleep(10);
|
|
|
|
}
|
|
|
|
|
2007-10-11 10:05:36 +00:00
|
|
|
int getty_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
2008-07-05 09:18:54 +00:00
|
|
|
int getty_main(int argc UNUSED_PARAM, char **argv)
|
2006-06-16 16:37:07 +00:00
|
|
|
{
|
2007-12-04 09:48:40 +00:00
|
|
|
int n;
|
2011-10-22 04:27:41 +00:00
|
|
|
pid_t pid, tsid;
|
2011-01-24 03:43:04 +00:00
|
|
|
char *logname;
|
2008-03-17 08:55:44 +00:00
|
|
|
|
2011-01-24 03:43:04 +00:00
|
|
|
INIT_G();
|
|
|
|
G.login = _PATH_LOGIN; /* default login program */
|
2006-06-16 16:37:07 +00:00
|
|
|
#ifdef ISSUE
|
2011-01-24 03:43:04 +00:00
|
|
|
G.issue = ISSUE; /* default issue file */
|
2006-06-16 16:37:07 +00:00
|
|
|
#endif
|
2011-01-24 17:17:19 +00:00
|
|
|
G.eol = '\r';
|
2005-09-29 11:31:26 +00:00
|
|
|
|
2011-01-24 13:35:09 +00:00
|
|
|
/* Parse command-line arguments */
|
|
|
|
parse_args(argv);
|
2008-03-17 08:55:44 +00:00
|
|
|
|
2011-10-22 04:27:41 +00:00
|
|
|
/* Create new session and pgrp, lose controlling tty */
|
|
|
|
pid = setsid(); /* this also gives us our pid :) */
|
|
|
|
if (pid < 0) {
|
|
|
|
int fd;
|
|
|
|
/* :(
|
|
|
|
* docs/ctty.htm says:
|
|
|
|
* "This is allowed only when the current process
|
|
|
|
* is not a process group leader".
|
|
|
|
* Thus, setsid() will fail if we _already_ are
|
|
|
|
* a session leader - which is quite possible for getty!
|
|
|
|
*/
|
|
|
|
pid = getpid();
|
2012-09-02 11:57:49 +00:00
|
|
|
if (getsid(0) != pid) {
|
2012-08-16 11:29:25 +00:00
|
|
|
//for debugging:
|
|
|
|
//bb_perror_msg_and_die("setsid failed:"
|
|
|
|
// " pid %d ppid %d"
|
|
|
|
// " sid %d pgid %d",
|
|
|
|
// pid, getppid(),
|
|
|
|
// getsid(0), getpgid(0));
|
2011-10-22 04:27:41 +00:00
|
|
|
bb_perror_msg_and_die("setsid");
|
2014-05-10 22:00:52 +00:00
|
|
|
/*
|
|
|
|
* When we can end up here?
|
|
|
|
* Example: setsid() fails when run alone in interactive shell:
|
|
|
|
* # getty 115200 /dev/tty2
|
|
|
|
* because shell's child (getty) is put in a new process group.
|
|
|
|
* But doesn't fail if shell is not interactive
|
|
|
|
* (and therefore doesn't create process groups for pipes),
|
|
|
|
* or if getty is not the first process in the process group:
|
|
|
|
* # true | getty 115200 /dev/tty2
|
|
|
|
*/
|
2012-08-16 11:29:25 +00:00
|
|
|
}
|
2011-10-22 04:27:41 +00:00
|
|
|
/* Looks like we are already a session leader.
|
|
|
|
* In this case (setsid failed) we may still have ctty,
|
|
|
|
* and it may be different from tty we need to control!
|
|
|
|
* If we still have ctty, on Linux ioctl(TIOCSCTTY)
|
2011-10-22 06:19:42 +00:00
|
|
|
* (which we are going to use a bit later) always fails -
|
|
|
|
* even if we try to take ctty which is already ours!
|
|
|
|
* Try to drop old ctty now to prevent that.
|
|
|
|
* Use O_NONBLOCK: old ctty may be a serial line.
|
2011-10-22 04:27:41 +00:00
|
|
|
*/
|
2011-10-22 06:19:42 +00:00
|
|
|
fd = open("/dev/tty", O_RDWR | O_NONBLOCK);
|
2011-10-22 04:27:41 +00:00
|
|
|
if (fd >= 0) {
|
2012-04-26 08:53:48 +00:00
|
|
|
/* TIOCNOTTY sends SIGHUP to the foreground
|
|
|
|
* process group - which may include us!
|
|
|
|
* Make sure to not die on it:
|
|
|
|
*/
|
|
|
|
sighandler_t old = signal(SIGHUP, SIG_IGN);
|
2011-10-22 04:27:41 +00:00
|
|
|
ioctl(fd, TIOCNOTTY);
|
|
|
|
close(fd);
|
2012-04-26 08:53:48 +00:00
|
|
|
signal(SIGHUP, old);
|
2011-10-22 04:27:41 +00:00
|
|
|
}
|
|
|
|
}
|
2007-12-04 09:48:40 +00:00
|
|
|
|
2011-10-22 04:27:41 +00:00
|
|
|
/* Close stdio, and stray descriptors, just in case */
|
2007-12-04 09:48:40 +00:00
|
|
|
n = xopen(bb_dev_null, O_RDWR);
|
2008-03-17 08:55:44 +00:00
|
|
|
/* dup2(n, 0); - no, we need to handle "getty - 9600" too */
|
|
|
|
xdup2(n, 1);
|
|
|
|
xdup2(n, 2);
|
2007-12-04 09:48:40 +00:00
|
|
|
while (n > 2)
|
|
|
|
close(n--);
|
2008-03-17 08:55:44 +00:00
|
|
|
|
|
|
|
/* Logging. We want special flavor of error_msg_and_die */
|
2015-10-09 14:42:57 +00:00
|
|
|
die_func = sleep10;
|
2006-10-23 02:10:45 +00:00
|
|
|
msg_eol = "\r\n";
|
2008-03-17 08:55:44 +00:00
|
|
|
/* most likely will internally use fd #3 in CLOEXEC mode: */
|
2006-10-03 21:00:43 +00:00
|
|
|
openlog(applet_name, LOG_PID, LOG_AUTH);
|
2006-09-07 16:20:03 +00:00
|
|
|
logmode = LOGMODE_BOTH;
|
|
|
|
|
2006-06-16 16:37:07 +00:00
|
|
|
#ifdef DEBUGGING
|
2008-07-21 23:05:26 +00:00
|
|
|
dbf = xfopen_for_write(DEBUGTERM);
|
2008-03-17 09:00:54 +00:00
|
|
|
for (n = 1; argv[n]; n++) {
|
2007-12-04 09:48:40 +00:00
|
|
|
debug(argv[n]);
|
|
|
|
debug("\n");
|
2002-06-04 20:45:46 +00:00
|
|
|
}
|
|
|
|
#endif
|
2005-09-29 11:31:26 +00:00
|
|
|
|
2007-12-04 09:48:40 +00:00
|
|
|
/* Open the tty as standard input, if it is not "-" */
|
2008-03-17 08:55:44 +00:00
|
|
|
debug("calling open_tty\n");
|
2011-01-24 03:43:04 +00:00
|
|
|
open_tty();
|
2011-10-22 04:27:41 +00:00
|
|
|
ndelay_off(STDIN_FILENO);
|
2008-03-17 08:55:44 +00:00
|
|
|
debug("duping\n");
|
2011-10-22 04:27:41 +00:00
|
|
|
xdup2(STDIN_FILENO, 1);
|
|
|
|
xdup2(STDIN_FILENO, 2);
|
|
|
|
|
|
|
|
/* Steal ctty if we don't have it yet */
|
|
|
|
tsid = tcgetsid(STDIN_FILENO);
|
|
|
|
if (tsid < 0 || pid != tsid) {
|
|
|
|
if (ioctl(STDIN_FILENO, TIOCSCTTY, /*force:*/ (long)1) < 0)
|
|
|
|
bb_perror_msg_and_die("TIOCSCTTY");
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef __linux__
|
|
|
|
/* Make ourself a foreground process group within our session */
|
|
|
|
if (tcsetpgrp(STDIN_FILENO, pid) < 0)
|
|
|
|
bb_perror_msg_and_die("tcsetpgrp");
|
|
|
|
#endif
|
2007-12-04 09:48:40 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* The following ioctl will fail if stdin is not a tty, but also when
|
|
|
|
* there is noise on the modem control lines. In the latter case, the
|
|
|
|
* common course of action is (1) fix your cables (2) give the modem more
|
|
|
|
* time to properly reset after hanging up. SunOS users can achieve (2)
|
|
|
|
* by patching the SunOS kernel variable "zsadtrlow" to a larger value;
|
|
|
|
* 5 seconds seems to be a good value.
|
|
|
|
*/
|
2011-10-22 04:27:41 +00:00
|
|
|
if (tcgetattr(STDIN_FILENO, &G.tty_attrs) < 0)
|
2010-09-01 09:31:43 +00:00
|
|
|
bb_perror_msg_and_die("tcgetattr");
|
2006-06-16 16:37:07 +00:00
|
|
|
|
2008-03-17 08:55:44 +00:00
|
|
|
/* Update the utmp file. This tty is ours now! */
|
2011-10-22 04:27:41 +00:00
|
|
|
update_utmp(pid, LOGIN_PROCESS, G.tty_name, "LOGIN", G.fakehost);
|
2007-12-04 09:48:40 +00:00
|
|
|
|
2011-10-22 04:27:41 +00:00
|
|
|
/* Initialize tty attrs (raw mode, eight-bit, blocking i/o) */
|
|
|
|
debug("calling init_tty_attrs\n");
|
|
|
|
init_tty_attrs(G.speeds[0]);
|
2006-06-16 16:37:07 +00:00
|
|
|
|
2007-12-04 09:48:40 +00:00
|
|
|
/* Write the modem init string and DON'T flush the buffers */
|
2011-01-09 20:44:51 +00:00
|
|
|
if (option_mask32 & F_INITSTRING) {
|
2006-06-16 16:37:07 +00:00
|
|
|
debug("writing init string\n");
|
2011-01-24 03:43:04 +00:00
|
|
|
full_write1_str(G.initstring);
|
2006-06-16 16:37:07 +00:00
|
|
|
}
|
|
|
|
|
2007-12-04 09:48:40 +00:00
|
|
|
/* Optionally detect the baud rate from the modem status message */
|
2006-06-16 16:37:07 +00:00
|
|
|
debug("before autobaud\n");
|
2011-01-09 20:44:51 +00:00
|
|
|
if (option_mask32 & F_PARSE)
|
2011-01-24 03:43:04 +00:00
|
|
|
auto_baud();
|
2006-06-16 16:37:07 +00:00
|
|
|
|
2007-12-04 09:48:40 +00:00
|
|
|
/* Set the optional timer */
|
2011-10-22 04:27:41 +00:00
|
|
|
signal(SIGALRM, alarm_handler);
|
2011-01-24 03:43:04 +00:00
|
|
|
alarm(G.timeout); /* if 0, alarm is not set */
|
2006-06-16 16:37:07 +00:00
|
|
|
|
2007-12-04 09:48:40 +00:00
|
|
|
/* Optionally wait for CR or LF before writing /etc/issue */
|
2011-01-09 20:44:51 +00:00
|
|
|
if (option_mask32 & F_WAITCRLF) {
|
2006-06-16 16:37:07 +00:00
|
|
|
char ch;
|
|
|
|
debug("waiting for cr-lf\n");
|
2008-05-19 09:48:17 +00:00
|
|
|
while (safe_read(STDIN_FILENO, &ch, 1) == 1) {
|
2008-03-17 08:55:44 +00:00
|
|
|
debug("read %x\n", (unsigned char)ch);
|
2006-06-16 16:37:07 +00:00
|
|
|
if (ch == '\n' || ch == '\r')
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2007-12-04 09:48:40 +00:00
|
|
|
logname = NULL;
|
2011-01-09 20:44:51 +00:00
|
|
|
if (!(option_mask32 & F_NOPROMPT)) {
|
2011-10-22 04:27:41 +00:00
|
|
|
/* NB: init_tty_attrs already set line speed
|
2011-01-24 03:43:04 +00:00
|
|
|
* to G.speeds[0] */
|
2007-12-04 09:48:40 +00:00
|
|
|
int baud_index = 0;
|
|
|
|
|
|
|
|
while (1) {
|
2011-01-24 13:35:09 +00:00
|
|
|
/* Read the login name */
|
2007-12-04 09:48:40 +00:00
|
|
|
debug("reading login name\n");
|
2011-01-24 03:43:04 +00:00
|
|
|
logname = get_logname();
|
2007-12-04 09:48:40 +00:00
|
|
|
if (logname)
|
|
|
|
break;
|
2011-01-24 13:35:09 +00:00
|
|
|
/* We are here only if G.numspeed > 1 */
|
2011-01-24 03:43:04 +00:00
|
|
|
baud_index = (baud_index + 1) % G.numspeed;
|
2011-10-22 04:27:41 +00:00
|
|
|
cfsetspeed(&G.tty_attrs, G.speeds[baud_index]);
|
|
|
|
set_tty_attrs();
|
2007-12-04 09:48:40 +00:00
|
|
|
}
|
2006-06-16 16:37:07 +00:00
|
|
|
}
|
|
|
|
|
2011-01-24 13:35:09 +00:00
|
|
|
/* Disable timer */
|
2008-03-17 08:55:44 +00:00
|
|
|
alarm(0);
|
2006-06-16 16:37:07 +00:00
|
|
|
|
2011-10-22 04:27:41 +00:00
|
|
|
finalize_tty_attrs();
|
2006-06-16 16:37:07 +00:00
|
|
|
|
2011-01-24 13:35:09 +00:00
|
|
|
/* Let the login program take care of password validation */
|
2007-12-04 09:48:40 +00:00
|
|
|
/* We use PATH because we trust that root doesn't set "bad" PATH,
|
2011-01-24 13:35:09 +00:00
|
|
|
* and getty is not suid-root applet */
|
2008-03-17 08:55:44 +00:00
|
|
|
/* With -n, logname == NULL, and login will ask for username instead */
|
2013-06-30 11:45:17 +00:00
|
|
|
BB_EXECLP(G.login, G.login, "--", logname, (char *)0);
|
2011-01-24 03:43:04 +00:00
|
|
|
bb_error_msg_and_die("can't execute '%s'", G.login);
|
2002-06-04 20:45:46 +00:00
|
|
|
}
|