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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:
- *
- * Al Longyear (longyear@netcom.com)
- * (I was the last person to change this code.)
- *
- * Added ability to handle Bourne shell style comments (i.e. # comment)
- * Felipe A. Rodriguez <far@ix.netcom.com> 3/4/97
- *
- * The original author is:
- *
- * Karl Fox <karl@MorningStar.Com>
- * Morning Star Technologies, Inc.
- * 1760 Zollinger Road
- * Columbus, OH 43221
- * (614)451-1883
- */
-
- static char rcsid[] = "$Id: chat.c.3.2,v 5.1 1996/02/23 21:07:14 perkins Exp $";
-
- #include <stdio.h>
- #include <fcntl.h>
- #include <signal.h>
- #include <errno.h>
- #include <string.h>
- #include <stdlib.h>
- #include <sys/types.h>
- #include <sys/stat.h>
- #include <syslog.h>
-
- #ifndef TERMIO
- #undef TERMIOS
- #define TERMIOS
- #endif
-
- #ifdef TERMIO
- #include <termio.h>
- #endif
- #ifdef TERMIOS
- #include <termios.h>
- #endif
-
- #define STR_LEN 1024
-
- #ifndef SIGTYPE
- #define SIGTYPE void
- #endif
-
- #ifdef __STDC__
- #undef __P
- #define __P(x) x
- #else
- #define __P(x) ()
- #define const
- #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;
-
- #define MAX_ABORTS 50
- #define DEFAULT_CHAT_TIMEOUT 45
-
- int verbose = 0;
- int quiet = 0;
- char *lock_file = (char *)0;
- char *chat_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;
-
- void *dup_mem __P((void *b, size_t c));
- void *copy_of __P((char *s));
- void usage __P((void));
- void logf __P((const char *str));
- void logflush __P((void));
- void fatal __P((const char *msg));
- void sysfatal __P((const char *msg));
- SIGTYPE sigalrm __P((int signo));
- SIGTYPE sigint __P((int signo));
- SIGTYPE sigterm __P((int signo));
- SIGTYPE sighup __P((int signo));
- void unalarm __P((void));
- void init __P((void));
- void set_tty_parameters __P((void));
- void break_sequence __P((void));
- void terminate __P((int status));
- void do_file __P((char *chat_file));
- void delay __P((void));
- int get_string __P((register char *string));
- int put_string __P((register char *s));
- int write_char __P((int c));
- int put_char __P((int c));
- int get_char __P((void));
- void chat_send __P((register char *s));
- char *character __P((int c));
- void chat_expect __P((register char *s));
- char *clean __P((register char *s, int sending));
- void break_sequence __P((void));
- void terminate __P((int status));
- void die __P((void));
-
- void *dup_mem(b, c)
- void *b;
- size_t c;
- {
- void *ans = malloc (c);
- if (!ans)
- fatal ("memory error!\n");
- memcpy (ans, b, c);
- return ans;
- }
-
- void *copy_of (s)
- char *s;
- {
- return dup_mem (s, strlen (s) + 1);
- }
-
- /*
- * chat [ -v ] [ -t timeout ] [ -f chat-file ] \
- * [...[[expect[-say[-expect...]] say expect[-say[-expect]] ...]]]
- *
- * Perform a UUCP-dialer-like chat script on stdin and stdout.
- */
- int
- main(argc, argv)
- int argc;
- char **argv;
- {
- int option;
- char *arg;
-
- program_name = *argv;
-
- while (option = OPTION(argc, argv))
- switch (option)
- {
- case 'v':
- ++verbose;
- break;
-
- case 'f':
- if (arg = OPTARG(argc, argv))
- chat_file = copy_of(arg);
- else
- usage();
-
- break;
-
- case 'l':
- if (arg = OPTARG(argc, argv))
- lock_file = copy_of(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();
-
- if (chat_file != NULL)
- {
- arg = ARG(argc, argv);
- if (arg != NULL)
- usage();
- else
- do_file (chat_file);
- }
- else
- {
- while (arg = ARG(argc, argv))
- {
- chat_expect(arg);
-
- if (arg = ARG(argc, argv))
- chat_send(arg);
- }
- }
-
- terminate(0);
- }
-
- /*
- * Process a chat script when read from a file.
- */
-
- void do_file (chat_file)
- char *chat_file;
- {
- int linect, len, sendflg;
- char *sp, *arg, quote;
- char buf [STR_LEN];
- FILE *cfp;
-
- if ((cfp = fopen (chat_file, "r")) == NULL)
- {
- syslog (LOG_ERR, "%s -- open failed: %m", chat_file);
- terminate (1);
- }
-
- linect = 0;
- sendflg = 0;
-
- while (fgets(buf, STR_LEN, cfp) != NULL) // read lines until EOF
- {
- sp = strchr (buf, '\n');
- if (sp)
- *sp = '\0';
-
- linect++;
- sp = buf;
- while (*sp != '\0') // parse a line
- {
- if (*sp == '#') // comments
- {
- logf(sp); // log comments thru syslog
- logf("\n");
- while(*sp != '\0')
- sp++;
- sp++;
- }
- else // else parse for send/expect
- {
- if (*sp == ' ' || *sp == '\t')
- {
- ++sp;
- continue;
- }
-
- if (*sp == '"' || *sp == '\'')
- {
- quote = *sp++;
- arg = sp;
- while (*sp != quote)
- {
- if (*sp == '\0')
- {
- syslog (LOG_ERR, "unterminated quote (line %d)",
- linect);
- terminate (1);
- }
-
- if (*sp++ == '\\')
- {
- if (*sp != '\0')
- {
- ++sp;
- }
- }
- }
- }
- else
- {
- arg = sp;
- while (*sp != '\0' && *sp != ' ' && *sp != '\t')
- {
- ++sp;
- }
- }
-
- if (*sp != '\0')
- *sp++ = '\0';
-
- if (sendflg)
- {
- chat_send (arg);
- }
- else
- {
- chat_expect (arg);
- }
- sendflg = !sendflg;
- }
- }
- }
- fclose (cfp);
- }
-
- /*
- * We got an error parsing the command line.
- */
- void usage()
- {
- fprintf(stderr, "\
- Usage: %s [-v] [-t timeout] {-f chat-file || chat-script}\n",
- program_name);
- exit(1);
- }
-
- char line[256];
- char *p;
-
- void logf (str)
- const char *str;
- {
- p = line + strlen(line);
- strcat (p, str);
-
- if (str[strlen(str)-1] == '\n')
- {
- syslog (LOG_INFO, "%s", line);
- line[0] = 0;
- }
- }
-
- void logflush()
- {
- if (line[0] != 0)
- {
- syslog(LOG_INFO, "%s", line);
- line[0] = 0;
- }
- }
-
- /*
- * Terminate with an error.
- */
- void die()
- {
- terminate(1);
- }
-
- /*
- * Print an error message and terminate.
- */
-
- void fatal (msg)
- const char *msg;
- {
- syslog(LOG_ERR, "%s", msg);
- terminate(1);
- }
-
- /*
- * Print an error message along with the system error message and
- * terminate.
- */
-
- void sysfatal (msg)
- const char *msg;
- {
- syslog(LOG_ERR, "%s: %m", msg);
- terminate(1);
- }
-
- int alarmed = 0;
-
- SIGTYPE sigalrm(signo)
- int signo;
- {
- int flags;
-
- alarm(1);
- alarmed = 1; /* Reset alarm to avoid race window */
- signal(SIGALRM, sigalrm); /* that can cause hanging in read() */
-
- logflush();
- 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)
- {
- syslog(LOG_INFO, "alarm");
- }
- }
-
- void 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(signo)
- int signo;
- {
- fatal("SIGINT");
- }
-
- SIGTYPE sigterm(signo)
- int signo;
- {
- fatal("SIGTERM");
- }
-
- SIGTYPE sighup(signo)
- int signo;
- {
- fatal("SIGHUP");
- }
-
- void init()
- {
- signal(SIGINT, sigint);
- signal(SIGTERM, sigterm);
- signal(SIGHUP, sighup);
-
- set_tty_parameters();
- signal(SIGALRM, sigalrm);
- alarm(0);
- alarmed = 0;
- }
-
- void 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
- }
-
- void break_sequence()
- {
- #ifdef TERMIOS
- tcsendbreak (0, 0);
- #endif
- }
-
- void terminate(status)
- int 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
- ) {
- syslog(LOG_ERR, "Can't restore terminal parameters: %m");
- exit(1);
- }
- exit(status);
- }
-
- /*
- * 'Clean up' this string.
- */
- char *clean(s, sending)
- register char *s;
- int sending;
- {
- char temp[STR_LEN], cur_chr;
- register char *s1;
- int add_return = sending;
- #define isoctal(chr) (((chr) >= '0') && ((chr) <= '7'))
-
- s1 = temp;
- while (*s)
- {
- cur_chr = *s++;
- if (cur_chr == '^')
- {
- cur_chr = *s++;
- if (cur_chr == '\0')
- {
- *s1++ = '^';
- break;
- }
- cur_chr &= 0x1F;
- if (cur_chr != 0)
- *s1++ = cur_chr;
- continue;
- }
-
- if (cur_chr != '\\')
- {
- *s1++ = cur_chr;
- continue;
- }
-
- cur_chr = *s++;
- if (cur_chr == '\0')
- {
- if (sending)
- {
- *s1++ = '\\';
- *s1++ = '\\';
- }
- break;
- }
-
- switch (cur_chr)
- {
- case 'b':
- *s1++ = '\b';
- break;
-
- case 'c':
- if (sending && *s == '\0')
- add_return = 0;
- else
- *s1++ = cur_chr;
- break;
-
- case '\\':
- case 'K':
- case 'p':
- case 'd':
- if (sending)
- *s1++ = '\\';
-
- *s1++ = cur_chr;
- break;
-
- case 'q':
- quiet = ! quiet;
- break;
-
- case 'r':
- *s1++ = '\r';
- break;
-
- case 'n':
- *s1++ = '\n';
- break;
-
- case 's':
- *s1++ = ' ';
- break;
-
- case 't':
- *s1++ = '\t';
- break;
-
- case 'N':
- if (sending)
- {
- *s1++ = '\\';
- *s1++ = '\0';
- }
- else
- *s1++ = 'N';
- break;
-
- default:
- if (isoctal (cur_chr))
- {
- cur_chr &= 0x07;
- if (isoctal (*s))
- {
- cur_chr <<= 3;
- cur_chr |= *s++ - '0';
- if (isoctal (*s))
- {
- cur_chr <<= 3;
- cur_chr |= *s++ - '0';
- }
- }
-
- if (cur_chr != 0 || sending)
- {
- if (sending && (cur_chr == '\\' || cur_chr == 0))
- *s1++ = '\\';
- *s1++ = cur_chr;
- }
- break;
- }
-
- if (sending)
- *s1++ = '\\';
- *s1++ = cur_chr;
- break;
- }
- }
-
- if (add_return)
- *s1++ = '\r';
-
- *s1++ = '\0'; /* guarantee closure */
- *s1++ = '\0'; /* terminate the string */
- return dup_mem (temp, (size_t) (s1 - temp)); /* may have embedded nuls */
- }
-
- /*
- * Process the expect string
- */
- void 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)
- syslog(LOG_INFO, "Failed (%s)", fail_reason);
- else
- syslog(LOG_INFO, "Failed");
-
- terminate(1);
- }
- }
- }
-
- char *character(c)
- int 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);
- }
-
- /*
- * process the reply string
- */
- void 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) || strlen(s1) > sizeof fail_buffer - 1)
- {
- syslog(LOG_WARNING, "Illegal or too-long ABORT string ('%s')", s);
- die();
- }
-
- abort_string[n_aborts++] = s1;
-
- if (verbose)
- {
- logf("abort on (");
-
- for (s1 = s; *s1; ++s1)
- logf(character(*s1));
-
- logf(")\n");
- }
- }
- else
- if (timeout_next)
- {
- timeout_next = 0;
- timeout = atoi(s);
-
- if (timeout <= 0)
- timeout = DEFAULT_CHAT_TIMEOUT;
-
- if (verbose)
- {
- syslog(LOG_INFO, "timeout set to %d seconds", timeout);
- }
- }
- else
- {
- if (strcmp(s, "EOT") == 0)
- s = "^D\\c";
- else
- if (strcmp(s, "BREAK") == 0)
- s = "\\K\\c";
- if ( ! put_string(s))
- {
- syslog(LOG_INFO, "Failed");
- terminate(1);
- }
- }
- }
-
- int get_char()
- {
- int status;
- char c;
-
- status = read(0, &c, 1);
-
- switch (status)
- {
- case 1:
- return ((int)c & 0x7F);
-
- default:
- syslog(LOG_WARNING, "warning: 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)
- int c;
- {
- int status;
- char ch = c;
-
- delay();
-
- status = write(1, &ch, 1);
-
- switch (status)
- {
- case 1:
- return (0);
-
- default:
- syslog(LOG_WARNING, "warning: 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 write_char (c)
- int c;
- {
- if (alarmed || put_char(c) < 0)
- {
- extern int errno;
-
- alarm(0); alarmed = 0;
-
- if (verbose)
- {
- if (errno == EINTR || errno == EWOULDBLOCK)
- syslog(LOG_INFO, " -- write timed out");
- else
- syslog(LOG_INFO, " -- write failed: %m");
- }
- return (0);
- }
- 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(character(*s1));
- }
-
- logf(")\n");
- }
-
- alarm(timeout); alarmed = 0;
-
- while (*s)
- {
- register char c = *s++;
-
- if (c != '\\')
- {
- if (!write_char (c))
- return 0;
- continue;
- }
-
- c = *s++;
- switch (c)
- {
- case 'd':
- sleep(1);
- break;
-
- case 'K':
- break_sequence();
- break;
-
- case 'p':
- usleep(10000); /* 1/100th of a second. */
- break;
-
- default:
- if (!write_char (c))
- return 0;
- break;
- }
- }
-
- 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(character(*s1));
-
- logf(")\n");
- }
-
- if (len > STR_LEN)
- {
- syslog(LOG_INFO, "expect string is too long");
- return 0;
- }
-
- if (len == 0)
- {
- if (verbose)
- {
- syslog(LOG_INFO, "got it");
- }
-
- 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(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)
- syslog(LOG_WARNING, "warning: alarm synchronization problem");
- }
-
- alarm(0);
-
- if (verbose && printed)
- {
- if (alarmed)
- logf(" -- read timed out\n");
- else
- {
- logflush();
- syslog(LOG_INFO, " -- read failed: %m");
- }
- }
-
- alarmed = 0;
- return (0);
- }
-
- #ifdef ultrix
- #undef NO_USLEEP
- #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
-
- /*
- * Delay an amount appropriate for between typed characters.
- */
- void delay()
- {
- # ifdef NO_USLEEP
- register int i;
-
- for (i = 0; i < 30000; ++i) /* ... did we just say appropriate? */
- ;
- # else /* NO_USLEEP */
- usleep(100);
- # endif /* NO_USLEEP */
- }
-