--- /dev/null
+/*
+ * 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 1.1 1994/05/20 05:32:16 paulus 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>
+
+#ifndef TERMIO
+#define TERMIOS
+#endif
+
+#ifdef sun
+# if defined(SUNOS) && SUNOS >= 41
+# ifndef HDB
+# define HDB
+# endif
+# endif
+#endif
+
+#ifdef ultrix
+#define SIGHAND_TYPE int (*)()
+#endif
+
+#ifdef TERMIO
+#include <termio.h>
+#endif
+#ifdef TERMIOS
+#include <termios.h>
+#endif
+
+#define STR_LEN 1024
+
+#ifndef SIGTYPE
+#define SIGTYPE void
+#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();
+ }
+
+#ifdef ultrix
+ openlog("chat", LOG_PID);
+#else
+ openlog("chat", LOG_PID | LOG_NDELAY, LOG_LOCAL2);
+
+ if (verbose) {
+ setlogmask(LOG_UPTO(LOG_INFO));
+ } else {
+ setlogmask(LOG_UPTO(LOG_WARNING));
+ }
+#endif
+
+
+ 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, 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, sigint);
+ signal(SIGTERM, sigterm);
+ signal(SIGHUP, sighup);
+
+ if (lock_file)
+ lock();
+
+ set_tty_parameters();
+ signal(SIGALRM, 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 (tcgetattr(0, &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 (tcsetattr(0, TCSANOW, &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
+ tcsetattr(0, TCSANOW, &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, minlen;
+ register char *s = temp, *end = s + STR_LEN;
+
+ fail_reason = (char *)0;
+ string = clean(string, 0);
+ len = strlen(string);
+ minlen = (len > sizeof(fail_buffer)? len: sizeof(fail_buffer)) - 1;
+
+ if (verbose)
+ {
+ register char *s1;
+
+ logf("expect (");
+
+ for (s1 = string; *s1; ++s1)
+ logf("%s", character(*s1));
+
+ logf(")\n");
+ }
+
+ if (len > STR_LEN)
+ {
+ logf("expect string is too long\n");
+ return;
+ }
+
+ 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 - 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 (s >= end)
+ {
+ strncpy(temp, s - minlen, minlen);
+ s = temp + minlen;
+ }
+
+ 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;
+ }
+}
+#ifdef ultrix
+#include <sys/types.h>
+#include <sys/time.h>
+
+/*
+ usleep -- support routine for 4.2BSD system call emulations
+ last edit: 29-Oct-1984 D A Gwyn
+ */
+
+extern int select();
+
+int
+usleep( usec ) /* returns 0 if ok, else -1 */
+ long usec; /* delay in microseconds */
+{
+ static struct /* `timeval' */
+ {
+ long tv_sec; /* seconds */
+ long tv_usec; /* microsecs */
+ } delay; /* _select() timeout */
+
+ delay.tv_sec = usec / 1000000L;
+ delay.tv_usec = usec % 1000000L;
+
+ return select( 0, (long *)0, (long *)0, (long *)0, &delay );
+}
+#endif
projects / ppp.git / commitdiff