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NetBSD/usr.sbin/pppd/chat/chat.c
brezak 7a19417ff8 Cleanup port to NetBSD
1993-08-23 14:36:07 +00:00

864 lines
14 KiB
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/*
* Chat -- a program for automatic session establishment (i.e. dial
* the phone and log in).
*
* This software is in the public domain.
*
* Please send all bug reports, requests for information, etc. to:
*
* Karl Fox <karl@MorningStar.Com>
* Morning Star Technologies, Inc.
* 1760 Zollinger Road
* Columbus, OH 43221
* (614)451-1883
*/
/*static char sccs_id[] = "@(#)chat.c 1.7";*/
static char rcsid[] = "$Id: chat.c,v 1.3 1993/08/23 14:36:07 brezak Exp $";
#include <stdio.h>
#include <fcntl.h>
#include <signal.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <varargs.h>
#include <syslog.h>
#ifdef __NetBSD__
#define TERMIOS
#define SIGHAND_TYPE __sighandler_t
#else
#define TERMIO
#endif
#ifdef sun
#define SIGHAND_TYPE int (*)()
# if defined(SUNOS) && SUNOS >= 41
# ifndef HDB
# define HDB
# endif
# endif
#endif
#ifdef TERMIO
#include <termio.h>
#endif
#ifdef TERMIOS
#include <sys/ioctl.h>
#include <termios.h>
#endif
#define STR_LEN 1024
#if defined(sun) | defined(SYSV) | defined(POSIX_SOURCE)
#define SIGTYPE void
#else
#define SIGTYPE int
#endif
/*************** Micro getopt() *********************************************/
#define OPTION(c,v) (_O&2&&**v?*(*v)++:!c||_O&4?0:(!(_O&1)&& \
(--c,++v),_O=4,c&&**v=='-'&&v[0][1]?*++*v=='-'\
&&!v[0][1]?(--c,++v,0):(_O=2,*(*v)++):0))
#define OPTARG(c,v) (_O&2?**v||(++v,--c)?(_O=1,--c,*v++): \
(_O=4,(char*)0):(char*)0)
#define OPTONLYARG(c,v) (_O&2&&**v?(_O=1,--c,*v++):(char*)0)
#define ARG(c,v) (c?(--c,*v++):(char*)0)
static int _O = 0; /* Internal state */
/*************** Micro getopt() *********************************************/
char *program_name;
extern char *strcpy(), *strcat(), *malloc();
extern int strlen();
#define copyof(s) ((s) ? strcpy(malloc(strlen(s) + 1), s) : (s))
#ifndef LOCK_DIR
# ifdef __NetBSD__
# define PIDSTRING
# define LOCK_DIR "/var/spool/lock"
# else
# ifdef HDB
# define PIDSTRING
# define LOCK_DIR "/usr/spool/locks"
# else /* HDB */
# define LOCK_DIR "/usr/spool/uucp"
# endif /* HDB */
# endif
#endif /* LOCK_DIR */
#define MAX_ABORTS 50
#define DEFAULT_CHAT_TIMEOUT 45
int verbose = 0;
int quiet = 0;
char *lock_file = (char *)0;
int timeout = DEFAULT_CHAT_TIMEOUT;
int have_tty_parameters = 0;
#ifdef TERMIO
struct termio saved_tty_parameters;
#endif
#ifdef TERMIOS
struct termios saved_tty_parameters;
#endif
char *abort_string[MAX_ABORTS], *fail_reason = (char *)0,
fail_buffer[50];
int n_aborts = 0, abort_next = 0, timeout_next = 0;
/*
* chat [ -v ] [ -t timeout ] [ -l lock-file ] \
* [...[[expect[-say[-expect...]] say expect[-say[-expect]] ...]]]
*
* Perform a UUCP-dialer-like chat script on stdin and stdout.
*/
main(argc, argv)
int argc;
char **argv;
{
int option, n;
char *arg;
program_name = *argv;
while (option = OPTION(argc, argv))
switch (option)
{
case 'v':
++verbose;
break;
case 'l':
if (arg = OPTARG(argc, argv))
lock_file = copyof(arg);
else
usage();
break;
case 't':
if (arg = OPTARG(argc, argv))
timeout = atoi(arg);
else
usage();
break;
default:
usage();
}
openlog("chat", LOG_PID | LOG_NDELAY, LOG_LOCAL2);
if (verbose) {
setlogmask(LOG_UPTO(LOG_INFO));
} else {
setlogmask(LOG_UPTO(LOG_WARNING));
}
init();
while (arg = ARG(argc, argv))
{
chat_expect(arg);
if (arg = ARG(argc, argv))
chat_send(arg);
}
terminate(0);
}
/*
* We got an error parsing the command line.
*/
usage()
{
fprintf(stderr,
"Usage: %s [ -v ] [ -l lock-file ] [ -t timeout ] chat-script\n",
program_name);
exit(1);
}
/*
* Print a warning message.
*/
/*VARARGS1*/
warn(format, arg1, arg2, arg3, arg4)
char *format;
int arg1, arg2, arg3, arg4;
{
logf("%s: Warning: ", program_name);
logf(format, arg1, arg2, arg3, arg4);
logf("\n");
}
/*
* Print an error message and terminate.
*/
/*VARARGS1*/
fatal(format, arg1, arg2, arg3, arg4)
char *format;
int arg1, arg2, arg3, arg4;
{
logf("%s: ", program_name);
logf(format, arg1, arg2, arg3, arg4);
logf("\n");
unlock();
terminate(1);
}
/*
* Print an error message along with the system error message and
* terminate.
*/
/*VARARGS1*/
sysfatal(format, arg1, arg2, arg3, arg4)
char *format;
int arg1, arg2, arg3, arg4;
{
char message[STR_LEN];
sprintf(message, "%s: ", program_name);
sprintf(message + strlen(message), format, arg1, arg2, arg3, arg4);
perror(message);
unlock();
terminate(1);
}
int alarmed = 0;
SIGTYPE
sigalrm()
{
int flags;
alarm(1); alarmed = 1; /* Reset alarm to avoid race window */
signal(SIGALRM, (SIGHAND_TYPE)sigalrm); /* that can cause hanging in read() */
if ((flags = fcntl(0, F_GETFL, 0)) == -1)
sysfatal("Can't get file mode flags on stdin");
else
if (fcntl(0, F_SETFL, flags | FNDELAY) == -1)
sysfatal("Can't set file mode flags on stdin");
if (verbose)
{
logf("alarm\n");
}
}
unalarm()
{
int flags;
if ((flags = fcntl(0, F_GETFL, 0)) == -1)
sysfatal("Can't get file mode flags on stdin");
else
if (fcntl(0, F_SETFL, flags & ~FNDELAY) == -1)
sysfatal("Can't set file mode flags on stdin");
}
SIGTYPE
sigint()
{
fatal("SIGINT");
}
SIGTYPE
sigterm()
{
fatal("SIGTERM");
}
SIGTYPE
sighup()
{
fatal("SIGHUP");
}
init()
{
signal(SIGINT, (SIGHAND_TYPE)sigint);
signal(SIGTERM, (SIGHAND_TYPE)sigterm);
signal(SIGHUP, (SIGHAND_TYPE)sighup);
if (lock_file)
lock();
set_tty_parameters();
signal(SIGALRM, (SIGHAND_TYPE)sigalrm);
alarm(0); alarmed = 0;
}
set_tty_parameters()
{
#ifdef TERMIO
struct termio t;
if (ioctl(0, TCGETA, &t) < 0)
sysfatal("Can't get terminal parameters");
#endif
#ifdef TERMIOS
struct termios t;
if (ioctl(0, TIOCGETA, &t) < 0)
sysfatal("Can't get terminal parameters");
#endif
saved_tty_parameters = t;
have_tty_parameters = 1;
t.c_iflag = IGNBRK | ISTRIP | IGNPAR;
t.c_oflag = 0;
t.c_lflag = 0;
t.c_cc[VERASE] = t.c_cc[VKILL] = 0;
t.c_cc[VMIN] = 1;
t.c_cc[VTIME] = 0;
#ifdef TERMIO
if (ioctl(0, TCSETA, &t) < 0)
sysfatal("Can't set terminal parameters");
#endif
#ifdef TERMIOS
if (ioctl(0, TIOCSETA, &t) < 0)
sysfatal("Can't set terminal parameters");
#endif
}
terminate(status)
{
if (have_tty_parameters &&
#ifdef TERMIO
ioctl(0, TCSETA, &saved_tty_parameters) < 0
#endif
#ifdef TERMIOS
ioctl(0, TIOCSETA, &saved_tty_parameters) < 0
#endif
) {
perror("Can't restore terminal parameters");
unlock();
exit(1);
}
exit(status);
}
/*
* Create a lock file for the named lock device
*/
lock()
{
char hdb_lock_buffer[12];
int fd, pid;
lock_file = strcat(strcat(strcpy(malloc(strlen(LOCK_DIR)
+ 1 + strlen(lock_file) + 1),
LOCK_DIR), "/"), lock_file);
if ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0)
{
char *s = lock_file;
lock_file = (char *)0; /* Don't remove someone else's lock file! */
sysfatal("Can't get lock file '%s'", s);
}
# ifdef PIDSTRING
sprintf(hdb_lock_buffer, "%10d\n", getpid());
write(fd, hdb_lock_buffer, 11);
# else
pid = getpid();
write(fd, &pid, sizeof pid);
# endif
close(fd);
}
/*
* Remove our lockfile
*/
unlock()
{
if (lock_file)
{
unlink(lock_file);
lock_file = (char *)0;
}
}
/*
* 'Clean up' this string.
*/
char *clean(s, sending)
register char *s;
int sending;
{
char temp[STR_LEN];
register char *s1;
int add_return = sending;
for (s1 = temp; *s; ++s)
switch (*s)
{
case '\\':
switch (*++s)
{
case '\\':
case 'd': if (sending)
*s1++ = '\\';
*s1++ = *s;
break;
case 'q': quiet = ! quiet; break;
case 'r': *s1++ = '\r'; break;
case 'n': *s1++ = '\n'; break;
case 's': *s1++ = ' '; break;
case 'c': if (sending && s[1] == '\0')
add_return = 0;
else
*s1++ = *s;
break;
default: *s1++ = *s;
}
break;
case '^':
*s1++ = (int)(*++s) & 0x1F;
break;
default:
*s1++ = *s;
}
if (add_return)
*s1++ = '\r';
*s1 = '\0';
return (copyof(temp));
}
/*
*
*/
chat_expect(s)
register char *s;
{
if (strcmp(s, "ABORT") == 0)
{
++abort_next;
return;
}
if (strcmp(s, "TIMEOUT") == 0)
{
++timeout_next;
return;
}
while (*s)
{
register char *hyphen;
for (hyphen = s; *hyphen; ++hyphen)
if (*hyphen == '-')
if (hyphen == s || hyphen[-1] != '\\')
break;
if (*hyphen == '-')
{
*hyphen = '\0';
if (get_string(s))
return;
else
{
s = hyphen + 1;
for (hyphen = s; *hyphen; ++hyphen)
if (*hyphen == '-')
if (hyphen == s || hyphen[-1] != '\\')
break;
if (*hyphen == '-')
{
*hyphen = '\0';
chat_send(s);
s = hyphen + 1;
}
else
{
chat_send(s);
return;
}
}
}
else
if (get_string(s))
return;
else
{
if (fail_reason)
logf("Failed(%s)\n", fail_reason);
else
logf("Failed\n");
unlock();
terminate(1);
}
}
}
char *character(c)
char c;
{
static char string[10];
char *meta;
meta = (c & 0x80) ? "M-" : "";
c &= 0x7F;
if (c < 32)
sprintf(string, "%s^%c", meta, (int)c + '@');
else
if (c == 127)
sprintf(string, "%s^?", meta);
else
sprintf(string, "%s%c", meta, c);
return (string);
}
/*
*
*/
chat_send(s)
register char *s;
{
if (abort_next)
{
char *s1;
abort_next = 0;
if (n_aborts >= MAX_ABORTS)
fatal("Too many ABORT strings");
s1 = clean(s, 0);
if (strlen(s1) > strlen(s))
fatal("Illegal ABORT string ('%s')\n", s);
if (strlen(s1) > sizeof fail_buffer - 1)
fatal("Too long ABORT string ('%s')\n", s);
strcpy(s, s1);
abort_string[n_aborts++] = s;
if (verbose)
{
register char *s1 = s;
logf("abort on (");
for (s1 = s; *s1; ++s1)
logf("%s", character(*s1));
logf(")\n");
}
}
else
if (timeout_next)
{
timeout_next = 0;
timeout = atoi(s);
if (timeout <= 0)
timeout = DEFAULT_CHAT_TIMEOUT;
if (verbose)
{
logf("timeout set to %d seconds\n", timeout);
}
}
else
if ( ! put_string(s))
{
logf("Failed\n");
unlock();
terminate(1);
}
}
int get_char()
{
int status;
char c;
status = read(0, &c, 1);
switch (status)
{
case 1:
return ((int)c & 0x7F);
default:
warn("read() on stdin returned %d", status);
case -1:
if ((status = fcntl(0, F_GETFL, 0)) == -1)
sysfatal("Can't get file mode flags on stdin");
else
if (fcntl(0, F_SETFL, status & ~FNDELAY) == -1)
sysfatal("Can't set file mode flags on stdin");
return (-1);
}
}
int put_char(c)
char c;
{
int status;
delay();
status = write(1, &c, 1);
switch (status)
{
case 1:
return (0);
default:
warn("write() on stdout returned %d", status);
case -1:
if ((status = fcntl(0, F_GETFL, 0)) == -1)
sysfatal("Can't get file mode flags on stdin");
else
if (fcntl(0, F_SETFL, status & ~FNDELAY) == -1)
sysfatal("Can't set file mode flags on stdin");
return (-1);
}
}
int put_string(s)
register char *s;
{
s = clean(s, 1);
if (verbose)
{
logf("send (");
if (quiet)
logf("??????");
else
{
register char *s1 = s;
for (s1 = s; *s1; ++s1)
logf("%s", character(*s1));
}
logf(")\n");
}
alarm(timeout); alarmed = 0;
for ( ; *s; ++s)
{
register char c = *s;
if (c == '\\')
if ((c = *++s) == '\0')
break;
else
if (c == 'd') /* \d -- Delay */
{
sleep(2);
continue;
}
if (alarmed || put_char(*s) < 0)
{
extern int errno;
alarm(0); alarmed = 0;
if (verbose)
{
if (errno == EINTR || errno == EWOULDBLOCK)
logf(" -- write timed out\n");
else
syslog(LOG_INFO, " -- write failed: %m");
}
return (0);
}
}
alarm(0); alarmed = 0;
return (1);
}
/*
* 'Wait for' this string to appear on this file descriptor.
*/
int get_string(string)
register char *string;
{
char temp[STR_LEN];
int c, printed = 0, len;
register char *s = temp, *end = s + STR_LEN;
fail_reason = (char *)0;
string = clean(string, 0);
len = strlen(string);
if (verbose)
{
register char *s1;
logf("expect (");
for (s1 = string; *s1; ++s1)
logf("%s", character(*s1));
logf(")\n");
}
if (len == 0)
{
if (verbose)
{
logf("got it\n");
}
return (1);
}
alarm(timeout); alarmed = 0;
while ( ! alarmed && (c = get_char()) >= 0)
{
int n, abort_len;
if (verbose)
{
if (c == '\n')
logf("\n");
else
logf("%s", character(c));
}
*s++ = c;
if (s >= end)
{
if (verbose)
{
logf(" -- too much data\n");
}
alarm(0); alarmed = 0;
return (0);
}
if (s - temp >= len &&
c == string[len - 1] &&
strncmp(s - len, string, len) == 0)
{
if (verbose)
{
logf("got it\n");
}
alarm(0); alarmed = 0;
return (1);
}
for (n = 0; n < n_aborts; ++n)
if (s - temp >= (abort_len = strlen(abort_string[n])) &&
strncmp(s - abort_len, abort_string[n], abort_len) == 0)
{
if (verbose)
{
logf(" -- failed\n");
}
alarm(0); alarmed = 0;
strcpy(fail_reason = fail_buffer, abort_string[n]);
return (0);
}
if (alarmed && verbose)
warn("Alarm synchronization problem");
}
alarm(0);
if (verbose && printed)
{
extern int errno;
if (alarmed)
logf(" -- read timed out\n");
else
syslog(LOG_INFO, " -- read failed: %m");
}
alarmed = 0;
return (0);
}
/*
* Delay an amount appropriate for between typed characters.
*/
delay()
{
register int i;
# ifdef NO_USLEEP
for (i = 0; i < 30000; ++i) /* ... did we just say appropriate? */
;
# else /* NO_USLEEP */
usleep(100);
# endif /* NO_USLEEP */
}
char line[256];
char *p;
logf(fmt, va_alist)
char *fmt;
va_dcl
{
va_list pvar;
char buf[256];
va_start(pvar);
vsprintf(buf, fmt, pvar);
va_end(pvar);
p = line + strlen(line);
strcat(p, buf);
if (buf[strlen(buf)-1] == '\n') {
syslog(LOG_INFO, "%s", line);
line[0] = 0;
}
}
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