859 lines
14 KiB
C
859 lines
14 KiB
C
/*
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* Chat -- a program for automatic session establishment (i.e. dial
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* the phone and log in).
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*
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* This software is in the public domain.
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*
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* Please send all bug reports, requests for information, etc. to:
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*
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* Karl Fox <karl@MorningStar.Com>
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* Morning Star Technologies, Inc.
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* 1760 Zollinger Road
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* Columbus, OH 43221
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* (614)451-1883
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*/
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/*static char sccs_id[] = "@(#)chat.c 1.7";*/
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static char rcsid[] = "$Id: chat.c,v 1.4 1993/11/09 04:57:19 paulus Exp $";
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#include <stdio.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <varargs.h>
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#include <syslog.h>
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#ifndef TERMIO
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#define TERMIOS
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#endif
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#ifdef sun
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# if defined(SUNOS) && SUNOS >= 41
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# ifndef HDB
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# define HDB
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# endif
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# endif
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#endif
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#ifdef TERMIO
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#include <termio.h>
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#endif
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#ifdef TERMIOS
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#include <termios.h>
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#endif
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#define STR_LEN 1024
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#ifndef SIGTYPE
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#define SIGTYPE void
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#endif
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/*************** Micro getopt() *********************************************/
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#define OPTION(c,v) (_O&2&&**v?*(*v)++:!c||_O&4?0:(!(_O&1)&& \
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(--c,++v),_O=4,c&&**v=='-'&&v[0][1]?*++*v=='-'\
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&&!v[0][1]?(--c,++v,0):(_O=2,*(*v)++):0))
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#define OPTARG(c,v) (_O&2?**v||(++v,--c)?(_O=1,--c,*v++): \
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(_O=4,(char*)0):(char*)0)
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#define OPTONLYARG(c,v) (_O&2&&**v?(_O=1,--c,*v++):(char*)0)
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#define ARG(c,v) (c?(--c,*v++):(char*)0)
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static int _O = 0; /* Internal state */
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/*************** Micro getopt() *********************************************/
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char *program_name;
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extern char *strcpy(), *strcat(), *malloc();
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extern int strlen();
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#define copyof(s) ((s) ? strcpy(malloc(strlen(s) + 1), s) : (s))
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#ifndef LOCK_DIR
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# ifdef __NetBSD__
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# define PIDSTRING
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# define LOCK_DIR "/var/spool/lock"
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# else
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# ifdef HDB
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# define PIDSTRING
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# define LOCK_DIR "/usr/spool/locks"
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# else /* HDB */
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# define LOCK_DIR "/usr/spool/uucp"
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# endif /* HDB */
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# endif
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#endif /* LOCK_DIR */
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#define MAX_ABORTS 50
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#define DEFAULT_CHAT_TIMEOUT 45
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int verbose = 0;
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int quiet = 0;
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char *lock_file = (char *)0;
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int timeout = DEFAULT_CHAT_TIMEOUT;
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int have_tty_parameters = 0;
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#ifdef TERMIO
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struct termio saved_tty_parameters;
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#endif
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#ifdef TERMIOS
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struct termios saved_tty_parameters;
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#endif
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char *abort_string[MAX_ABORTS], *fail_reason = (char *)0,
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fail_buffer[50];
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int n_aborts = 0, abort_next = 0, timeout_next = 0;
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/*
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* chat [ -v ] [ -t timeout ] [ -l lock-file ] \
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* [...[[expect[-say[-expect...]] say expect[-say[-expect]] ...]]]
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*
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* Perform a UUCP-dialer-like chat script on stdin and stdout.
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*/
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main(argc, argv)
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int argc;
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char **argv;
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{
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int option, n;
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char *arg;
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program_name = *argv;
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while (option = OPTION(argc, argv))
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switch (option)
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{
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case 'v':
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++verbose;
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break;
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case 'l':
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if (arg = OPTARG(argc, argv))
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lock_file = copyof(arg);
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else
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usage();
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break;
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case 't':
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if (arg = OPTARG(argc, argv))
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timeout = atoi(arg);
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else
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usage();
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break;
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default:
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usage();
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}
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openlog("chat", LOG_PID | LOG_NDELAY, LOG_LOCAL2);
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if (verbose) {
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setlogmask(LOG_UPTO(LOG_INFO));
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} else {
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setlogmask(LOG_UPTO(LOG_WARNING));
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}
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init();
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while (arg = ARG(argc, argv))
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{
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chat_expect(arg);
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if (arg = ARG(argc, argv))
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chat_send(arg);
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}
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terminate(0);
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}
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/*
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* We got an error parsing the command line.
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*/
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usage()
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{
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fprintf(stderr,
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"Usage: %s [ -v ] [ -l lock-file ] [ -t timeout ] chat-script\n",
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program_name);
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exit(1);
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}
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/*
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* Print a warning message.
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*/
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/*VARARGS1*/
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warn(format, arg1, arg2, arg3, arg4)
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char *format;
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int arg1, arg2, arg3, arg4;
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{
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logf("%s: Warning: ", program_name);
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logf(format, arg1, arg2, arg3, arg4);
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logf("\n");
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}
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/*
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* Print an error message and terminate.
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*/
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/*VARARGS1*/
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fatal(format, arg1, arg2, arg3, arg4)
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char *format;
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int arg1, arg2, arg3, arg4;
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{
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logf("%s: ", program_name);
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logf(format, arg1, arg2, arg3, arg4);
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logf("\n");
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unlock();
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terminate(1);
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}
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/*
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* Print an error message along with the system error message and
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* terminate.
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*/
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/*VARARGS1*/
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sysfatal(format, arg1, arg2, arg3, arg4)
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char *format;
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int arg1, arg2, arg3, arg4;
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{
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char message[STR_LEN];
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sprintf(message, "%s: ", program_name);
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sprintf(message + strlen(message), format, arg1, arg2, arg3, arg4);
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perror(message);
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unlock();
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terminate(1);
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}
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int alarmed = 0;
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SIGTYPE
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sigalrm()
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{
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int flags;
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alarm(1); alarmed = 1; /* Reset alarm to avoid race window */
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signal(SIGALRM, sigalrm); /* that can cause hanging in read() */
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if ((flags = fcntl(0, F_GETFL, 0)) == -1)
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sysfatal("Can't get file mode flags on stdin");
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else
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if (fcntl(0, F_SETFL, flags | FNDELAY) == -1)
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sysfatal("Can't set file mode flags on stdin");
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if (verbose)
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{
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logf("alarm\n");
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}
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}
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unalarm()
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{
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int flags;
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if ((flags = fcntl(0, F_GETFL, 0)) == -1)
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sysfatal("Can't get file mode flags on stdin");
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else
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if (fcntl(0, F_SETFL, flags & ~FNDELAY) == -1)
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sysfatal("Can't set file mode flags on stdin");
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}
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SIGTYPE
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sigint()
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{
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fatal("SIGINT");
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}
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SIGTYPE
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sigterm()
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{
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fatal("SIGTERM");
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}
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SIGTYPE
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sighup()
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{
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fatal("SIGHUP");
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}
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init()
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{
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signal(SIGINT, sigint);
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signal(SIGTERM, sigterm);
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signal(SIGHUP, sighup);
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if (lock_file)
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lock();
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set_tty_parameters();
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signal(SIGALRM, sigalrm);
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alarm(0); alarmed = 0;
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}
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set_tty_parameters()
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{
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#ifdef TERMIO
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struct termio t;
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if (ioctl(0, TCGETA, &t) < 0)
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sysfatal("Can't get terminal parameters");
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#endif
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#ifdef TERMIOS
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struct termios t;
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if (tcgetattr(0, &t) < 0)
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sysfatal("Can't get terminal parameters");
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#endif
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saved_tty_parameters = t;
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have_tty_parameters = 1;
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t.c_iflag = IGNBRK | ISTRIP | IGNPAR;
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t.c_oflag = 0;
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t.c_lflag = 0;
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t.c_cc[VERASE] = t.c_cc[VKILL] = 0;
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t.c_cc[VMIN] = 1;
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t.c_cc[VTIME] = 0;
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#ifdef TERMIO
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if (ioctl(0, TCSETA, &t) < 0)
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sysfatal("Can't set terminal parameters");
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#endif
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#ifdef TERMIOS
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if (tcsetattr(0, TCSANOW, &t) < 0)
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sysfatal("Can't set terminal parameters");
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#endif
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}
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terminate(status)
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{
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if (have_tty_parameters &&
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#ifdef TERMIO
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ioctl(0, TCSETA, &saved_tty_parameters) < 0
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#endif
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#ifdef TERMIOS
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tcsetattr(0, TCSANOW, &saved_tty_parameters) < 0
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#endif
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) {
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perror("Can't restore terminal parameters");
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unlock();
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exit(1);
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}
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exit(status);
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}
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/*
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* Create a lock file for the named lock device
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*/
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lock()
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{
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char hdb_lock_buffer[12];
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int fd, pid;
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lock_file = strcat(strcat(strcpy(malloc(strlen(LOCK_DIR)
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+ 1 + strlen(lock_file) + 1),
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LOCK_DIR), "/"), lock_file);
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if ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0)
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{
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char *s = lock_file;
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lock_file = (char *)0; /* Don't remove someone else's lock file! */
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sysfatal("Can't get lock file '%s'", s);
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}
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# ifdef PIDSTRING
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sprintf(hdb_lock_buffer, "%10d\n", getpid());
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write(fd, hdb_lock_buffer, 11);
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# else
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pid = getpid();
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write(fd, &pid, sizeof pid);
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# endif
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close(fd);
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}
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/*
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* Remove our lockfile
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*/
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unlock()
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{
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if (lock_file)
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{
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unlink(lock_file);
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lock_file = (char *)0;
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}
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}
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/*
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* 'Clean up' this string.
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*/
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char *clean(s, sending)
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register char *s;
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int sending;
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{
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char temp[STR_LEN];
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register char *s1;
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int add_return = sending;
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for (s1 = temp; *s; ++s)
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switch (*s)
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{
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case '\\':
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switch (*++s)
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{
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case '\\':
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case 'd': if (sending)
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*s1++ = '\\';
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*s1++ = *s;
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break;
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case 'q': quiet = ! quiet; break;
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case 'r': *s1++ = '\r'; break;
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case 'n': *s1++ = '\n'; break;
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case 's': *s1++ = ' '; break;
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case 'c': if (sending && s[1] == '\0')
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add_return = 0;
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else
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*s1++ = *s;
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break;
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default: *s1++ = *s;
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}
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break;
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case '^':
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*s1++ = (int)(*++s) & 0x1F;
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break;
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default:
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*s1++ = *s;
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}
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if (add_return)
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*s1++ = '\r';
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*s1 = '\0';
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return (copyof(temp));
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}
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/*
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*
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*/
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chat_expect(s)
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register char *s;
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{
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if (strcmp(s, "ABORT") == 0)
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{
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++abort_next;
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return;
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}
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if (strcmp(s, "TIMEOUT") == 0)
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{
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++timeout_next;
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return;
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}
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while (*s)
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{
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register char *hyphen;
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for (hyphen = s; *hyphen; ++hyphen)
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if (*hyphen == '-')
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if (hyphen == s || hyphen[-1] != '\\')
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break;
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if (*hyphen == '-')
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{
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*hyphen = '\0';
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if (get_string(s))
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return;
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else
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{
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s = hyphen + 1;
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for (hyphen = s; *hyphen; ++hyphen)
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if (*hyphen == '-')
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if (hyphen == s || hyphen[-1] != '\\')
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break;
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if (*hyphen == '-')
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{
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*hyphen = '\0';
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chat_send(s);
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s = hyphen + 1;
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}
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else
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{
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chat_send(s);
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return;
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}
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}
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}
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else
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if (get_string(s))
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return;
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else
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{
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if (fail_reason)
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logf("Failed(%s)\n", fail_reason);
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else
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logf("Failed\n");
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unlock();
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terminate(1);
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}
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}
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}
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char *character(c)
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char c;
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{
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static char string[10];
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char *meta;
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meta = (c & 0x80) ? "M-" : "";
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c &= 0x7F;
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if (c < 32)
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sprintf(string, "%s^%c", meta, (int)c + '@');
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else
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if (c == 127)
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sprintf(string, "%s^?", meta);
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else
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sprintf(string, "%s%c", meta, c);
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return (string);
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}
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/*
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*
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*/
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chat_send(s)
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register char *s;
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{
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if (abort_next)
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{
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char *s1;
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abort_next = 0;
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if (n_aborts >= MAX_ABORTS)
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fatal("Too many ABORT strings");
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s1 = clean(s, 0);
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if (strlen(s1) > strlen(s))
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fatal("Illegal ABORT string ('%s')\n", s);
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if (strlen(s1) > sizeof fail_buffer - 1)
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fatal("Too long ABORT string ('%s')\n", s);
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strcpy(s, s1);
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abort_string[n_aborts++] = s;
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if (verbose)
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{
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register char *s1 = s;
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logf("abort on (");
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for (s1 = s; *s1; ++s1)
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logf("%s", character(*s1));
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logf(")\n");
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}
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}
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else
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if (timeout_next)
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{
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timeout_next = 0;
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timeout = atoi(s);
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if (timeout <= 0)
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timeout = DEFAULT_CHAT_TIMEOUT;
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if (verbose)
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{
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logf("timeout set to %d seconds\n", timeout);
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}
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}
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else
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if ( ! put_string(s))
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{
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logf("Failed\n");
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unlock();
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terminate(1);
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}
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}
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int get_char()
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{
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int status;
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char c;
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status = read(0, &c, 1);
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switch (status)
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{
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case 1:
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return ((int)c & 0x7F);
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default:
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warn("read() on stdin returned %d", status);
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case -1:
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if ((status = fcntl(0, F_GETFL, 0)) == -1)
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sysfatal("Can't get file mode flags on stdin");
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else
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if (fcntl(0, F_SETFL, status & ~FNDELAY) == -1)
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sysfatal("Can't set file mode flags on stdin");
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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;
|
|
}
|
|
}
|