/* agetty.c - another getty program for Linux. By W. Z. Venema 1989
Ported to Linux by Peter Orbaek <poe@daimi.aau.dk>
This program is freely distributable. The entire man-page used to
be here. Now read the real man-page agetty.8 instead.
*/
#ifndef lint
char sccsid[] = "@(#) agetty.c 1.29 9/1/91 23:22:00";
#endif
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <termio.h>
#include <signal.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <varargs.h>
#include <ctype.h>
#include <utmp.h>
#include <getopt.h>
#include <memory.h>
#include <sys/file.h>
#ifdef linux
#include "pathnames.h"
#include <sys/param.h>
#define USE_SYSLOG
#endif
/* If USE_SYSLOG is undefined all diagnostics go directly to /dev/console. */
#ifdef USE_SYSLOG
#include <syslog.h>
extern void closelog();
#endif
/*
* Some heuristics to find out what environment we are in: if it is not
* System V, assume it is SunOS 4.
*/
#ifdef LOGIN_PROCESS /* defined in System V utmp.h */
#define SYSV_STYLE /* select System V style getty */
#endif
/*
* Things you may want to modify.
*
* If ISSUE is not defined, agetty will never display the contents of the
* /etc/issue file. You will not want to spit out large "issue" files at the
* wrong baud rate. Relevant for System V only.
*
* 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.
*/
#ifdef SYSV_STYLE
#define ISSUE "/etc/issue" /* displayed before the login prompt */
#include <sys/utsname.h>
#include <time.h>
#endif
#define LOGIN " login: " /* login prompt */
/* Some shorthands for control characters. */
#define CTL(x) (x ^ 0100) /* Assumes ASCII dialect */
#define CR CTL('M') /* carriage return */
#define NL CTL('J') /* line feed */
#define BS CTL('H') /* back space */
#define DEL CTL('?') /* delete */
/* Defaults for line-editing etc. characters; you may want to change this. */
#define DEF_ERASE DEL /* default erase character */
#define DEF_INTR CTL('C') /* default interrupt character */
#define DEF_QUIT CTL('\\') /* default quit char */
#define DEF_KILL CTL('U') /* default kill char */
#define DEF_EOF CTL('D') /* default EOF char */
#define DEF_EOL 0
#define DEF_SWITCH 0 /* default switch char */
/*
* SunOS 4.1.1 termio is broken. We must use the termios stuff instead,
* because the termio -> termios translation does not clear the termios
* CIBAUD bits. Therefore, the tty driver would sometimes report that input
* baud rate != output baud rate. I did not notice that problem with SunOS
* 4.1. We will use termios where available, and termio otherwise.
*/
/* linux 0.12 termio is broken too, if we use it c_cc[VERASE] isn't set
properly, but all is well if we use termios?! */
#ifdef TCGETS
#undef TCGETA
#undef TCSETA
#undef TCSETAW
#define termio termios
#define TCGETA TCGETS
#define TCSETA TCSETS
#define TCSETAW TCSETSW
#endif
/*
* This program tries to not use the standard-i/o library. This keeps the
* executable small on systems that do not have shared libraries (System V
* Release <3).
*/
#define BUFSIZ 1024
/*
* When multiple baud rates are specified on the command line, the first one
* we will try is the first one specified.
*/
#define FIRST_SPEED 0
/* Storage for command-line options. */
#define MAX_SPEED 10 /* max. nr. of baud rates */
struct options {
int flags; /* toggle switches, see below */
int timeout; /* time-out period */
char *login; /* login program */
int numspeed; /* number of baud rates to try */
int speeds[MAX_SPEED]; /* baud rates to be tried */
char *tty; /* name of tty */
};
#define F_PARSE (1<<0) /* process modem status messages */
#define F_ISSUE (1<<1) /* display /etc/issue */
#define F_RTSCTS (1<<2) /* enable RTS/CTS flow control */
#define F_LOCAL (1<<3) /* force local */
/* Storage for things detected while the login name was read. */
struct chardata {
int erase; /* erase character */
int kill; /* kill character */
int eol; /* end-of-line character */
int parity; /* what parity did we see */
int capslock; /* upper case without lower case */
};
/* Initial values for the above. */
struct chardata init_chardata = {
DEF_ERASE, /* default erase character */
DEF_KILL, /* default kill character */
0, /* always filled in at runtime */
0, /* space parity */
0, /* always filled in at runtime */
};
#define P_(s) ()
void parse_args P_((int argc, char **argv, struct options *op));
void parse_speeds P_((struct options *op, char *arg));
void update_utmp P_((char *line));
void open_tty P_((char *tty, struct termio *tp, int local));
void termio_init P_((struct termio *tp, int speed, int local));
void auto_baud P_((struct termio *tp));
void do_prompt P_((struct options *op, struct termio *tp));
void next_speed P_((struct termio *tp, struct options *op));
char *get_logname P_((struct options *op, struct chardata *cp, struct termio *tp));
void termio_final P_((struct options *op, struct termio *tp, struct chardata *cp));
int caps_lock P_((char *s));
int bcode P_((char *s));
void usage P_((void));
void error P_((int va_alist));
#undef P_
/* The following is used for understandable diagnostics. */
char *progname;
/* ... */
#ifdef DEBUGGING
#define debug(s) fprintf(dbf,s); fflush(dbf)
FILE *dbf;
#else
#define debug(s) /* nothing */
#endif
int
main(argc, argv)
int argc;
char **argv;
{
char *logname; /* login name, given to /bin/login */
char *get_logname();
struct chardata chardata; /* set by get_logname() */
struct termio termio; /* terminal mode bits */
static struct options options = {
F_ISSUE, /* show /etc/issue (SYSV_STYLE) */
0, /* no timeout */
_PATH_LOGIN, /* default login program */
0, /* no baud rates known yet */
};
/* The BSD-style init command passes us a useless process name. */
#ifdef SYSV_STYLE
progname = argv[0];
#else
progname = "agetty";
#endif
#ifdef DEBUGGING
dbf = fopen("/dev/tty1", "w");
{ int i;
for(i = 1; i < argc; i++) {
debug(argv[i]);
}
}
#endif
/* Parse command-line arguments. */
parse_args(argc, argv, &options);
#ifdef linux
setsid();
#endif
/* Update the utmp file. */
#ifdef SYSV_STYLE
update_utmp(options.tty);
#endif
/* Open the tty as standard { input, output, error }. */
open_tty(options.tty, &termio, options.flags & F_LOCAL);
#ifdef linux
{
int iv;
iv = getpid();
(void) ioctl(0, TIOCSPGRP, &iv);
}
#endif
/* Initialize the termio settings (raw mode, eight-bit, blocking i/o). */
termio_init(&termio, options.speeds[FIRST_SPEED], options.flags & F_LOCAL);
/* Optionally detect the baud rate from the modem status message. */
if (options.flags & F_PARSE)
auto_baud(&termio);
/* Set the optional timer. */
if (options.timeout)
(void) alarm((unsigned) options.timeout);
/* Read the login name. */
while ((logname = get_logname(&options, &chardata, &termio)) == 0)
next_speed(&termio, &options);
/* Disable timer. */
if (options.timeout)
(void) alarm(0);
/* Finalize the termio settings. */
termio_final(&options, &termio, &chardata);
/* Now the newline character should be properly written. */
(void) write(1, "\n", 1);
/* Let the login program take care of password validation. */
(void) execl(options.login, options.login, "--", logname, (char *) 0);
error("%s: can't exec %s: %m", options.tty, options.login);
exit(0); /* quiet GCC */
}
/* parse-args - parse command-line arguments */
void
parse_args(argc, argv, op)
int argc;
char **argv;
struct options *op;
{
extern char *optarg; /* getopt */
extern int optind; /* getopt */
int c;
while (isascii(c = getopt(argc, argv, "Lhil:mt:"))) {
switch (c) {
case 'L': /* force local */
op->flags |= F_LOCAL;
break;
case 'h': /* enable h/w flow control */
op->flags |= F_RTSCTS;
break;
case 'i': /* do not show /etc/issue */
op->flags &= ~F_ISSUE;
break;
case 'l':
op->login = optarg; /* non-default login program */
break;
case 'm': /* parse modem status message */
op->flags |= F_PARSE;
break;
case 't': /* time out */
if ((op->timeout = atoi(optarg)) <= 0)
error("bad timeout value: %s", optarg);
break;
default:
usage();
}
}
debug("after getopt loop\n");
if (argc < optind + 2) /* check parameter count */
usage();
/* we loosen up a bit and accept both "baudrate tty" and "tty baudrate" */
if('0' <= argv[optind][0] && argv[optind][0] <= '9') {
/* a number first, assume it's a speed (BSD style) */
parse_speeds(op, argv[optind++]); /* baud rate(s) */
op->tty = argv[optind]; /* tty name */
} else {
op->tty = argv[optind++]; /* tty name */
parse_speeds(op, argv[optind]); /* baud rate(s) */
}
optind++;
if (argc > optind && argv[optind])
setenv ("TERM", argv[optind], 1);
debug("exiting parseargs\n");
}
/* parse_speeds - parse alternate baud rates */
void
parse_speeds(op, arg)
struct options *op;
char *arg;
{
char *strtok();
char *cp;
debug("entered parse_speeds\n");
for (cp = strtok(arg, ","); cp != 0; cp = strtok((char *) 0, ",")) {
if ((op->speeds[op->numspeed++] = bcode(cp)) <= 0)
error("bad speed: %s", cp);
if (op->numspeed > MAX_SPEED)
error("too many alternate speeds");
}
debug("exiting parsespeeds\n");
}
#ifdef SYSV_STYLE
/* update_utmp - update our utmp entry */
void
update_utmp(line)
char *line;
{
struct utmp ut;
long ut_size = sizeof(ut); /* avoid nonsense */
int ut_fd;
int mypid = getpid();
long time();
long lseek();
char *strncpy();
/*
* The utmp file holds miscellaneous information about things started by
* /etc/init and other system-related events. Our purpose is to update
* the utmp entry for the current process, in particular the process type
* and the tty line we are listening to. Return successfully only if the
* utmp file can be opened for update, and if we are able to find our
* entry in the utmp file.
*/
#ifdef linux
utmpname(_PATH_UTMP);
memset(&ut, 0, sizeof(ut));
(void) strncpy(ut.ut_user, "LOGIN", sizeof(ut.ut_user));
(void) strncpy(ut.ut_line, line, sizeof(ut.ut_line));
(void) strncpy(ut.ut_id, line + 3, sizeof(ut.ut_id));
(void) time(&ut.ut_time);
ut.ut_type = LOGIN_PROCESS;
ut.ut_pid = mypid;
pututline(&ut);
endutent();
if((ut_fd = open(_PATH_WTMP, O_APPEND|O_WRONLY)) >= 0) {
flock(ut_fd, LOCK_EX);
write(ut_fd, &ut, sizeof(ut));
flock(ut_fd, LOCK_UN);
close(ut_fd);
}
#else
if ((ut_fd = open(UTMP_FILE, 2)) < 0) {
error("%s: open for update: %m", UTMP_FILE);
} else {
while (read(ut_fd, (char *) &ut, sizeof(ut)) == sizeof(ut)) {
if (ut.ut_type == INIT_PROCESS && ut.ut_pid == mypid) {
ut.ut_type = LOGIN_PROCESS;
ut.ut_time = time((long *) 0);
(void) strncpy(ut.ut_name, "LOGIN", sizeof(ut.ut_name));
(void) strncpy(ut.ut_line, line, sizeof(ut.ut_line));
(void) lseek(ut_fd, -ut_size, 1);
(void) write(ut_fd, (char *) &ut, sizeof(ut));
(void) close(ut_fd);
return;
}
}
error("%s: no utmp entry", line);
}
#endif /* linux */
}
#endif
/* open_tty - set up tty as standard { input, output, error } */
void
open_tty(tty, tp, local)
char *tty;
struct termio *tp;
int local;
{
/* Get rid of the present standard { output, error} if any. */
(void) close(1);
(void) close(2);
errno = 0; /* ignore above errors */
/* Set up new standard input, unless we are given an already opened port. */
if (strcmp(tty, "-")) {
struct stat st;
/* Sanity checks... */
if (chdir("/dev"))
error("/dev: chdir() failed: %m");
if (stat(tty, &st) < 0)
error("/dev/%s: %m", tty);
if ((st.st_mode & S_IFMT) != S_IFCHR)
error("/dev/%s: not a character device", tty);
/* Open the tty as standard input. */
(void) close(0);
errno = 0; /* ignore close(2) errors */
if (open(tty, (local ? O_RDWR|O_NONBLOCK : O_RDWR), 0) != 0)
error("/dev/%s: cannot open as standard input: %m", tty);
} else {
/*
* Standard input should already be connected to an open port. Make
* sure it is open for read/write.
*/
if ((fcntl(0, F_GETFL, 0) & O_RDWR) != O_RDWR)
error("%s: not open for read/write", tty);
}
/* Set up standard output and standard error file descriptors. */
if (dup(0) != 1 || dup(0) != 2) /* set up stdout and stderr */
error("%s: dup problem: %m", tty); /* we have a problem */
/*
* 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.
*/
if (ioctl(0, TCGETA, tp) < 0)
error("%s: ioctl: %m", tty);
/*
* It seems to be a terminal. Set proper protections and ownership. Mode
* 0622 is suitable for SYSV <4 because /bin/login does not change
* protections. SunOS 4 login will change the protections to 0620 (write
* access for group tty) after the login has succeeded.
*/
(void) chown(tty, 0, 0); /* root, sys */
(void) chmod(tty, 0622); /* crw--w--w- */
errno = 0; /* ignore above errors */
}
/* termio_init - initialize termio settings */
char gbuf[1024];
char area[1024];
void
termio_init(tp, speed, local)
struct termio *tp;
int speed;
int local;
{
/*
* Initial termio settings: 8-bit characters, raw-mode, blocking i/o.
* Special characters are set after we have read the login name; all
* reads will be done in raw mode anyway. Errors will be dealt with
* lateron.
*/
#ifdef linux
/* flush input and output queues, important for modems! */
(void) ioctl(0, TCFLSH, 2);
#endif
tp->c_cflag = CS8 | HUPCL | CREAD | speed;
if (local) {
tp->c_cflag |= CLOCAL;
}
tp->c_iflag = tp->c_lflag = tp->c_oflag = tp->c_line = 0;
tp->c_cc[VMIN] = 1;
tp->c_cc[VTIME] = 0;
(void) ioctl(0, TCSETA, tp);
if (local) {
(void) fcntl(0, F_SETFL, fcntl(0, F_GETFL, 0) & ~O_NDELAY);
}
debug("term_io 2\n");
}
/* auto_baud - extract baud rate from modem status message */
void
auto_baud(tp)
struct termio *tp;
{
int speed;
int vmin;
unsigned iflag;
char buf[BUFSIZ];
char *bp;
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:
*
* <junk><number><junk>
*
* 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.
*/
/*
* Use 7-bit characters, don't block if input queue is empty. Errors will
* be dealt with lateron.
*/
iflag = tp->c_iflag;
tp->c_iflag |= ISTRIP; /* enable 8th-bit stripping */
vmin = tp->c_cc[VMIN];
tp->c_cc[VMIN] = 0; /* don't block if queue empty */
(void) ioctl(0, TCSETA, tp);
/*
* Wait for a while, then read everything the modem has said so far and
* try to extract the speed of the dial-in call.
*/
(void) sleep(1);
if ((nread = read(0, buf, sizeof(buf) - 1)) > 0) {
buf[nread] = '\0';
for (bp = buf; bp < buf + nread; bp++) {
if (isascii(*bp) && isdigit(*bp)) {
if (speed = bcode(bp)) {
tp->c_cflag &= ~CBAUD;
tp->c_cflag |= speed;
}
break;
}
}
}
/* Restore terminal settings. Errors will be dealt with lateron. */
tp->c_iflag = iflag;
tp->c_cc[VMIN] = vmin;
(void) ioctl(0, TCSETA, tp);
}
/* do_prompt - show login prompt, optionally preceded by /etc/issue contents */
void
do_prompt(op, tp)
struct options *op;
struct termio *tp;
{
#ifdef ISSUE
FILE *fd;
int oflag;
char c;
struct utsname uts;
(void) uname(&uts);
#endif
(void) write(1, "\r\n", 2); /* start a new line */
#ifdef ISSUE /* optional: show /etc/issue */
if ((op->flags & F_ISSUE) && (fd = fopen(ISSUE, "r"))) {
oflag = tp->c_oflag; /* save current setting */
tp->c_oflag |= (ONLCR | OPOST); /* map NL in output to CR-NL */
(void) ioctl(0, TCSETAW, tp);
while ((c = getc(fd)) != EOF)
{
if (c == '\\')
{
c = getc(fd);
switch (c)
{
case 's':
(void) printf ("%s", uts.sysname);
break;
case 'n':
(void) printf ("%s", uts.nodename);
break;
case 'r':
(void) printf ("%s", uts.release);
break;
case 'v':
(void) printf ("%s", uts.version);
break;
case 'm':
(void) printf ("%s", uts.machine);
break;
case 'o':
(void) printf ("%s", uts.domainname);
break;
case 'd':
case 't':
{
char *weekday[] = { "Sun", "Mon", "Tue", "Wed", "Thu",
"Fri", "Sat" };
char *month[] = { "Jan", "Feb", "Mar", "Apr", "May",
"Jun", "Jul", "Aug", "Sep", "Oct",
"Nov", "Dec" };
time_t now;
struct tm *tm;
(void) time (&now);
tm = localtime(&now);
if (c == 'd')
(void) printf ("%s %s %d %d",
weekday[tm->tm_wday], month[tm->tm_mon],
tm->tm_mday,
tm->tm_year < 70 ? tm->tm_year + 2000 :
tm->tm_year + 1900);
else
(void) printf ("%02d:%02d:%02d",
tm->tm_hour, tm->tm_min, tm->tm_sec);
break;
}
case 'l':
(void) printf ("%s", op->tty);
break;
case 'b':
{
char *zpeedz[] = { "0", "50", "75", "110", "134.5",
"150", "200", "300", "600", "1200",
"1800", "2400", "4800", "9600",
"19200", "38400" };
(void) printf ("%s", zpeedz[tp->c_cflag & CBAUD]);
break;
}
case 'u':
case 'U':
{
int users = 0;
struct utmp *ut;
setutent();
while (ut = getutent())
if (ut->ut_type == USER_PROCESS)
users++;
endutent();
printf ("%d", users);
if (c == 'U')
printf (" user%s", users == 1 ? "" : "s");
break;
}
default:
(void) putchar(c);
}
}
else
(void) putchar(c);
}
fflush(stdout);
tp->c_oflag = oflag; /* restore settings */
(void) ioctl(0, TCSETAW, tp); /* wait till output is gone */
(void) fclose(fd);
}
#endif
#ifdef linux
{
char hn[MAXHOSTNAMELEN+1];
(void) gethostname(hn, MAXHOSTNAMELEN);
write(1, hn, strlen(hn));
}
#endif
(void) write(1, LOGIN, sizeof(LOGIN) - 1); /* always show login prompt */
}
/* next_speed - select next baud rate */
void
next_speed(tp, op)
struct termio *tp;
struct options *op;
{
static int baud_index = FIRST_SPEED;/* current speed index */
baud_index = (baud_index + 1) % op->numspeed;
tp->c_cflag &= ~CBAUD;
tp->c_cflag |= op->speeds[baud_index];
(void) ioctl(0, TCSETA, tp);
}
/* get_logname - get user name, establish parity, speed, erase, kill, eol */
char *get_logname(op, cp, tp)
struct options *op;
struct chardata *cp;
struct termio *tp;
{
char logname[BUFSIZ];
char *bp;
char c; /* input character, full eight bits */
char ascval; /* low 7 bits of input character */
int bits; /* # of "1" bits per character */
int mask; /* mask with 1 bit up */
static char *erase[] = { /* backspace-space-backspace */
"\010\040\010", /* space parity */
"\010\040\010", /* odd parity */
"\210\240\210", /* even parity */
"\210\240\210", /* no parity */
};
/* Initialize kill, erase, parity etc. (also after switching speeds). */
*cp = init_chardata;
/* Flush pending input (esp. after parsing or switching the baud rate). */
(void) sleep(1);
(void) ioctl(0, TCFLSH, (struct termio *) 0);
/* Prompt for and read a login name. */
for (*logname = 0; *logname == 0; /* void */ ) {
/* Write issue file and prompt, with "parity" bit == 0. */
do_prompt(op, tp);
/* Read name, watch for break, parity, erase, kill, end-of-line. */
for (bp = logname, cp->eol = 0; cp->eol == 0; /* void */ ) {
/* Do not report trivial EINTR/EIO errors. */
if (read(0, &c, 1) < 1) {
if (errno == EINTR || errno == EIO)
exit(0);
error("%s: read: %m", op->tty);
}
/* Do BREAK handling elsewhere. */
if ((c == 0) && op->numspeed > 1)
return (0);
/* Do parity bit handling. */
if (c != (ascval = (c & 0177))) { /* "parity" bit on ? */
for (bits = 1, mask = 1; mask & 0177; mask <<= 1)
if (mask & ascval)
bits++; /* count "1" bits */
cp->parity |= ((bits & 1) ? 1 : 2);
}
/* Do erase, kill and end-of-line processing. */
switch (ascval) {
case CR:
case NL:
*bp = 0; /* terminate logname */
cp->eol = ascval; /* set end-of-line char */
break;
case BS:
case DEL:
case '#':
cp->erase = ascval; /* set erase character */
if (bp > logname) {
(void) write(1, erase[cp->parity], 3);
bp--;
}
break;
case CTL('U'):
case '@':
cp->kill = ascval; /* set kill character */
while (bp > logname) {
(void) write(1, erase[cp->parity], 3);
bp--;
}
break;
case CTL('D'):
exit(0);
default:
if (!isascii(ascval) || !isprint(ascval)) {
/* ignore garbage characters */ ;
} else if (bp - logname >= sizeof(logname) - 1) {
error("%s: input overrun", op->tty);
} else {
(void) write(1, &c, 1); /* echo the character */
*bp++ = ascval; /* and store it */
}
break;
}
}
}
/* Handle names with upper case and no lower case. */
if (cp->capslock = caps_lock(logname)) {
for (bp = logname; *bp; bp++)
if (isupper(*bp))
*bp = tolower(*bp); /* map name to lower case */
}
return (logname);
}
/* termio_final - set the final tty mode bits */
void
termio_final(op, tp, cp)
struct options *op;
struct termio *tp;
struct chardata *cp;
{
/* General terminal-independent stuff. */
tp->c_iflag |= IXON | IXOFF; /* 2-way flow control */
tp->c_lflag |= ICANON | ISIG | ECHO | ECHOE | ECHOK| ECHOKE;
/* no longer| ECHOCTL | ECHOPRT*/
tp->c_oflag |= OPOST;
/* tp->c_cflag = 0; */
tp->c_cc[VINTR] = DEF_INTR; /* default interrupt */
tp->c_cc[VQUIT] = DEF_QUIT; /* default quit */
tp->c_cc[VEOF] = DEF_EOF; /* default EOF character */
tp->c_cc[VEOL] = DEF_EOL;
#ifdef linux
tp->c_cc[VSWTC] = DEF_SWITCH; /* default switch character */
#else
tp->c_cc[VSWTCH] = DEF_SWITCH; /* default switch character */
#endif
/* Account for special characters seen in input. */
if (cp->eol == CR) {
tp->c_iflag |= ICRNL; /* map CR in input to NL */
tp->c_oflag |= ONLCR; /* map NL in output to CR-NL */
}
tp->c_cc[VERASE] = cp->erase; /* set erase character */
tp->c_cc[VKILL] = cp->kill; /* set kill character */
/* Account for the presence or absence of parity bits in input. */
switch (cp->parity) {
case 0: /* space (always 0) parity */
break;
case 1: /* odd parity */
tp->c_cflag |= PARODD;
/* FALLTHROUGH */
case 2: /* even parity */
tp->c_cflag |= PARENB;
tp->c_iflag |= INPCK | ISTRIP;
/* FALLTHROUGH */
case (1 | 2): /* no parity bit */
tp->c_cflag &= ~CSIZE;
tp->c_cflag |= CS7;
break;
}
/* Account for upper case without lower case. */
if (cp->capslock) {
tp->c_iflag |= IUCLC;
tp->c_lflag |= XCASE;
tp->c_oflag |= OLCUC;
}
/* Optionally enable hardware flow control */
#ifdef CRTSCTS
if (op->flags & F_RTSCTS)
tp->c_cflag |= CRTSCTS;
#endif
/* Finally, make the new settings effective */
if (ioctl(0, TCSETA, tp) < 0)
error("%s: ioctl: TCSETA: %m", op->tty);
}
/* caps_lock - string contains upper case without lower case */
int
caps_lock(s)
char *s;
{
int capslock;
for (capslock = 0; *s; s++) {
if (islower(*s))
return (0);
if (capslock == 0)
capslock = isupper(*s);
}
return (capslock);
}
/* bcode - convert speed string to speed code; return 0 on failure */
int
bcode(s)
char *s;
{
struct Speedtab {
long speed;
int code;
};
static struct Speedtab speedtab[] = {
50, B50,
75, B75,
110, B110,
134, B134,
150, B150,
200, B200,
300, B300,
600, B600,
1200, B1200,
1800, B1800,
2400, B2400,
4800, B4800,
9600, B9600,
#ifdef B19200
19200, B19200,
#endif
#ifdef B38400
38400, B38400,
#endif
#ifdef EXTA
19200, EXTA,
#endif
#ifdef EXTB
38400, EXTB,
#endif
0, 0,
};
struct Speedtab *sp;
long speed = atol(s);
for (sp = speedtab; sp->speed; sp++)
if (sp->speed == speed)
return (sp->code);
return (0);
}
/* usage - explain */
void
usage()
{
#if defined(SYSV_STYLE) && !defined(linux)
static char msg[] =
"[-i] [-l login_program] [-m] [-t timeout] line baud_rate,...";
#else
static char msg[] =
"[-h] [-l login_program] [-m] [-t timeout] baud_rate,... line";
#endif
error("usage: %s %s", progname, msg);
}
/* error - report errors to console or syslog; only understands %s and %m */
#define str2cpy(b,s1,s2) strcat(strcpy(b,s1),s2)
/* VARARGS */
void
error(va_alist)
va_dcl
{
va_list ap;
char *fmt;
#ifndef USE_SYSLOG
int fd;
#endif
char buf[BUFSIZ];
char *bp;
char *strcpy();
char *strcat();
/*
* If the diagnostic is reported via syslog(3), the process name is
* automatically prepended to the message. If we write directly to
* /dev/console, we must prepend the process name ourselves.
*/
#ifdef USE_SYSLOG
buf[0] = '\0';
bp = buf;
#else
(void) str2cpy(buf, progname, ": ");
bp = buf + strlen(buf);
#endif
/*
* %s expansion is done by hand. On a System V Release 2 system without
* shared libraries and without syslog(3), linking with the the stdio
* library would make the program three times as big...
*
* %m expansion is done here as well. Too bad syslog(3) does not have a
* vsprintf() like interface.
*/
va_start(ap);
fmt = va_arg(ap, char *);
while (*fmt) {
if (strncmp(fmt, "%s", 2) == 0) {
(void) strcpy(bp, va_arg(ap, char *));
bp += strlen(bp);
fmt += 2;
} else if (strncmp(fmt, "%m", 2) == 0) {
(void) strcpy(bp, sys_errlist[errno]);
bp += strlen(bp);
fmt += 2;
} else {
*bp++ = *fmt++;
}
}
*bp = 0;
va_end(ap);
/*
* Write the diagnostic directly to /dev/console if we do not use the
* syslog(3) facility.
*/
#ifdef USE_SYSLOG
(void) openlog(progname, LOG_PID, LOG_AUTH);
(void) syslog(LOG_ERR, "%s", buf);
closelog();
#else
/* Terminate with CR-LF since the console mode is unknown. */
(void) strcat(bp, "\r\n");
if ((fd = open("/dev/console", 1)) >= 0) {
(void) write(fd, buf, strlen(buf));
(void) close(fd);
}
#endif
(void) sleep((unsigned) 10); /* be kind to init(8) */
exit(1);
}
