source: owl.c @ d609dd6

barnowl_perlaimdebianrelease-1.4release-1.5release-1.6release-1.7release-1.8release-1.9
Last change on this file since d609dd6 was 8203afd, checked in by Nelson Elhage <nelhage@mit.edu>, 15 years ago
* Renaming package owl to BarnOwl:: * Moving hooks into the BarnOwl::Hooks package, and restoring support for .owlconf files that use sub startup {} and so on.
  • Property mode set to 100644
File size: 25.3 KB
Line 
1/*  Copyright (c) 2004 James Kretchmar. All rights reserved.
2 *
3 *  Redistribution and use in source and binary forms, with or without
4 *  modification, are permitted provided that the following conditions are
5 *  met:
6 * 
7 *    * Redistributions of source code must retain the above copyright
8 *      notice, this list of conditions and the following disclaimer.
9 * 
10 *    * Redistributions in binary form must reproduce the above copyright
11 *      notice, this list of conditions and the following disclaimer in
12 *      the documentation and/or other materials provided with the
13 *      distribution.
14 * 
15 *    * Redistributions in any form must be accompanied by information on
16 *      how to obtain complete source code for the Owl software and any
17 *      accompanying software that uses the Owl software. The source code
18 *      must either be included in the distribution or be available for no
19 *      more than the cost of distribution plus a nominal fee, and must be
20 *      freely redistributable under reasonable conditions. For an
21 *      executable file, complete source code means the source code for
22 *      all modules it contains. It does not include source code for
23 *      modules or files that typically accompany the major components of
24 *      the operating system on which the executable file runs.
25 * 
26 *
27 *  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
28 *  IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
29 *  WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
30 *  NON-INFRINGEMENT, ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
31 *  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32 *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33 *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
34 *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
35 *  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
36 *  OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
37 *  IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
38 */
39
40#include <stdio.h>
41#include <unistd.h>
42#include <stdlib.h>
43#include <string.h>
44#include <signal.h>
45#include <time.h>
46#include <sys/param.h>
47#include <sys/types.h>
48#include <termios.h>
49#include <sys/stat.h>
50#include "owl.h"
51
52#if OWL_STDERR_REDIR
53#ifdef HAVE_SYS_IOCTL_H
54#include <sys/ioctl.h>
55#endif
56#ifdef HAVE_SYS_FILIO_H
57#include <sys/filio.h>
58#endif
59int stderr_replace(void);
60#endif
61
62static const char fileIdent[] = "$Id$";
63
64owl_global g;
65
66int main(int argc, char **argv, char **env)
67{
68  WINDOW *recwin, *sepwin, *typwin, *msgwin;
69  owl_editwin *tw;
70  owl_popwin *pw;
71  int j, ret, initialsubs, debug, argcsave, followlast;
72  int newmsgs, zpendcount, nexttimediff;
73  struct sigaction sigact;
74  char *configfile, *tty, *perlout, *perlerr, **argvsave, buff[LINE], startupmsg[LINE];
75  owl_filter *f;
76  owl_style *s;
77  time_t nexttime, now;
78  struct tm *today;
79  char *dir;
80  struct termios tio;
81#ifdef HAVE_LIBZEPHYR
82  ZNotice_t notice;
83#endif
84#if OWL_STDERR_REDIR
85  int newstderr;
86#endif
87
88  argcsave=argc;
89  argvsave=argv;
90  configfile=NULL;
91  tty=NULL;
92  debug=0;
93  initialsubs=1;
94  if (argc>0) {
95    argv++;
96    argc--;
97  }
98  while (argc>0) {
99    if (!strcmp(argv[0], "-n")) {
100      initialsubs=0;
101      argv++;
102      argc--;
103    } else if (!strcmp(argv[0], "-c")) {
104      if (argc<2) {
105        fprintf(stderr, "Too few arguments to -c\n");
106        usage();
107        exit(1);
108      }
109      configfile=argv[1];
110      argv+=2;
111      argc-=2;
112    } else if (!strcmp(argv[0], "-t")) {
113      if (argc<2) {
114        fprintf(stderr, "Too few arguments to -t\n");
115        usage();
116        exit(1);
117      }
118      tty=argv[1];
119      argv+=2;
120      argc-=2;
121    } else if (!strcmp(argv[0], "-d")) {
122      debug=1;
123      argv++;
124      argc--;
125    } else if (!strcmp(argv[0], "-D")) {
126      debug=1;
127      unlink(OWL_DEBUG_FILE);
128      argv++;
129      argc--;
130    } else if (!strcmp(argv[0], "-v")) {
131      printf("This is owl version %s\n", OWL_VERSION_STRING);
132      exit(0);
133    } else {
134      fprintf(stderr, "Uknown argument\n");
135      usage();       
136      exit(1);
137    }
138  }
139
140  owl_function_debugmsg("startup: Finished parsing arguments");
141
142  /* signal handler */
143  /*sigact.sa_handler=sig_handler;*/
144  sigact.sa_sigaction=sig_handler;
145  sigemptyset(&sigact.sa_mask);
146  sigact.sa_flags=SA_SIGINFO;
147  sigaction(SIGWINCH, &sigact, NULL);
148  sigaction(SIGALRM, &sigact, NULL);
149  sigaction(SIGPIPE, &sigact, NULL);
150  sigaction(SIGTERM, &sigact, NULL);
151  sigaction(SIGHUP, &sigact, NULL);
152
153  /* save initial terminal settings */
154  tcgetattr(0, owl_global_get_startup_tio(&g));
155
156  /* turn ISTRIP off */
157  tcgetattr(0, &tio);
158  tio.c_iflag &= ~ISTRIP;
159  tcsetattr(0, TCSAFLUSH, &tio);
160
161  /* screen init */
162  if (!getenv("TERMINFO")) {
163    sprintf(buff, "TERMINFO=%s", TERMINFO);
164    putenv(buff);
165    owl_function_debugmsg("startup: setting TERMINFO to %s", TERMINFO);
166  } else {
167    owl_function_debugmsg("startup: leaving TERMINFO as %s from envrionment", getenv("TERMINFO"));
168  }
169  initscr();
170  start_color();
171#ifdef HAVE_USE_DEFAULT_COLORS
172  use_default_colors();
173#endif
174  raw();
175  noecho();
176
177  /* define simple color pairs */
178  if (has_colors() && COLOR_PAIRS>=8) {
179    init_pair(OWL_COLOR_BLACK,   COLOR_BLACK,   -1);
180    init_pair(OWL_COLOR_RED,     COLOR_RED,     -1);
181    init_pair(OWL_COLOR_GREEN,   COLOR_GREEN,   -1);
182    init_pair(OWL_COLOR_YELLOW,  COLOR_YELLOW,  -1);
183    init_pair(OWL_COLOR_BLUE,    COLOR_BLUE,    -1);
184    init_pair(OWL_COLOR_MAGENTA, COLOR_MAGENTA, -1);
185    init_pair(OWL_COLOR_CYAN,    COLOR_CYAN,    -1);
186    init_pair(OWL_COLOR_WHITE,   COLOR_WHITE,   -1);
187  }
188
189  /* owl global init */
190  owl_global_init(&g);
191    if (debug) owl_global_set_debug_on(&g);
192  owl_function_debugmsg("startup: first available debugging message");
193  owl_global_set_startupargs(&g, argcsave, argvsave);
194  owl_global_set_haveaim(&g);
195
196#ifdef HAVE_LIBZEPHYR
197  /* zephyr init */
198  ret=owl_zephyr_initialize();
199  if (!ret)
200      owl_global_set_havezephyr(&g);
201#endif
202
203#if OWL_STDERR_REDIR
204  /* Do this only after we've started curses up... */
205  owl_function_debugmsg("startup: doing stderr redirection");
206  newstderr = stderr_replace();
207  owl_muxevents_add(owl_global_get_muxevents(&g), newstderr, OWL_MUX_READ,
208                    stderr_redirect_handler, NULL);
209#endif   
210
211  /* create the owl directory, in case it does not exist */
212  owl_function_debugmsg("startup: creating owl directory, if not present");
213  dir=owl_sprintf("%s/%s", owl_global_get_homedir(&g), OWL_CONFIG_DIR);
214  mkdir(dir, S_IRWXU);
215  owl_free(dir);
216
217  /* set the tty, either from the command line, or by figuring it out */
218  owl_function_debugmsg("startup: setting tty name");
219  if (tty) {
220    owl_global_set_tty(&g, tty);
221  } else {
222    owl_global_set_tty(&g, owl_util_get_default_tty());
223  }
224
225  /* setup the built-in styles */
226  owl_function_debugmsg("startup: creating built-in styles");
227  s=owl_malloc(sizeof(owl_style));
228  owl_style_create_internal(s, "default", &owl_stylefunc_default, "Default message formatting");
229  owl_global_add_style(&g, s);
230
231  s=owl_malloc(sizeof(owl_style));
232  owl_style_create_internal(s, "basic", &owl_stylefunc_basic, "Basic message formatting.");
233  owl_global_add_style(&g, s);
234#if 0
235  s=owl_malloc(sizeof(owl_style));
236  owl_style_create_internal(s, "vt", &owl_stylefunc_vt, "VT message formatting.");
237  owl_global_add_style(&g, s);
238#endif
239  s=owl_malloc(sizeof(owl_style));
240  owl_style_create_internal(s, "oneline", &owl_stylefunc_oneline, "Formats for one-line-per-message");
241  owl_global_add_style(&g, s);
242
243  /* setup the default filters */
244  /* the personal filter will need to change again when AIM chat's are
245   *  included.  Also, there should be an %aimme% */
246  owl_function_debugmsg("startup: creating default filters");
247  f=owl_malloc(sizeof(owl_filter));
248  owl_filter_init_fromstring(f, "personal", "isprivate ^true$");
249  owl_list_append_element(owl_global_get_filterlist(&g), f);
250
251  f=owl_malloc(sizeof(owl_filter));
252  owl_filter_init_fromstring(f, "trash", "class ^mail$ or opcode ^ping$ or type ^admin$ or ( not login ^none$ )");
253  owl_list_append_element(owl_global_get_filterlist(&g), f);
254
255  f=owl_malloc(sizeof(owl_filter));
256  owl_filter_init_fromstring(f, "ping", "opcode ^ping$");
257  owl_list_append_element(owl_global_get_filterlist(&g), f);
258
259  f=owl_malloc(sizeof(owl_filter));
260  owl_filter_init_fromstring(f, "auto", "opcode ^auto$");
261  owl_list_append_element(owl_global_get_filterlist(&g), f);
262
263  f=owl_malloc(sizeof(owl_filter));
264  owl_filter_init_fromstring(f, "login", "not login ^none$");
265  owl_list_append_element(owl_global_get_filterlist(&g), f);
266
267  f=owl_malloc(sizeof(owl_filter));
268  owl_filter_init_fromstring(f, "reply-lockout", "class ^noc or class ^mail$");
269  owl_list_append_element(owl_global_get_filterlist(&g), f);
270
271  f=owl_malloc(sizeof(owl_filter));
272  owl_filter_init_fromstring(f, "out", "direction ^out$");
273  owl_list_append_element(owl_global_get_filterlist(&g), f);
274
275  f=owl_malloc(sizeof(owl_filter));
276  owl_filter_init_fromstring(f, "aim", "type ^aim$");
277  owl_list_append_element(owl_global_get_filterlist(&g), f);
278
279  f=owl_malloc(sizeof(owl_filter));
280  owl_filter_init_fromstring(f, "zephyr", "type ^zephyr$");
281  owl_list_append_element(owl_global_get_filterlist(&g), f);
282
283  f=owl_malloc(sizeof(owl_filter));
284  owl_filter_init_fromstring(f, "none", "false");
285  owl_list_append_element(owl_global_get_filterlist(&g), f);
286
287  f=owl_malloc(sizeof(owl_filter));
288  owl_filter_init_fromstring(f, "all", "true");
289  owl_list_append_element(owl_global_get_filterlist(&g), f);
290
291  /* set the current view */
292  owl_function_debugmsg("startup: setting the current view");
293  owl_view_create(owl_global_get_current_view(&g), "main", f, owl_global_get_style_by_name(&g, "default"));
294
295  /* AIM init */
296  owl_function_debugmsg("startup: doing AIM initialization");
297  owl_aim_init();
298
299  /* process the startup file */
300  owl_function_debugmsg("startup: processing startup file");
301  owl_function_source(NULL);
302
303  /* read the config file */
304  owl_function_debugmsg("startup: processing config file");
305  owl_context_set_readconfig(owl_global_get_context(&g));
306  perlerr=owl_perlconfig_readconfig(configfile);
307  if (perlerr) {
308    endwin();
309    owl_function_error("Error parsing configfile: %s\n", perlerr);
310    fprintf(stderr, "\nError parsing configfile: %s\n", perlerr);
311    fflush(stderr);
312    printf("\nError parsing configfile: %s\n", perlerr);
313    fflush(stdout);
314    exit(1);
315  }
316
317  /* if the config defines a formatting function, add 'perl' as a style */
318  if (owl_global_is_config_format(&g)) {
319    owl_function_debugmsg("Found perl formatting");
320    s=owl_malloc(sizeof(owl_style));
321    owl_style_create_perl(s, "perl", "BarnOwl::_format_msg_legacy_wrap",
322                          "User-defined perl style that calls BarnOwl::format_msg"
323                          "with legacy global variable support");
324    owl_global_add_style(&g, s);
325    owl_global_set_default_style(&g, "perl");
326  }
327
328  /* execute the startup function in the configfile */
329  owl_function_debugmsg("startup: executing perl startup, if applicable");
330  perlout = owl_perlconfig_execute("BarnOwl::Hooks::startup();");
331  if (perlout) owl_free(perlout);
332 
333  /* hold on to the window names for convenience */
334  msgwin=owl_global_get_curs_msgwin(&g);
335  recwin=owl_global_get_curs_recwin(&g);
336  sepwin=owl_global_get_curs_sepwin(&g);
337  typwin=owl_global_get_curs_typwin(&g);
338  tw=owl_global_get_typwin(&g);
339
340  /* welcome message */
341  owl_function_debugmsg("startup: creating splash message");
342  strcpy(startupmsg, "-----------------------------------------------------------------------\n");
343  sprintf(buff,      "Welcome to Owl version %s.  Press 'h' for on-line help. \n", OWL_VERSION_STRING);
344  strcat(startupmsg, buff);
345  strcat(startupmsg, "                                                                       \n");
346  strcat(startupmsg, "This is an UNOFFICIAL DEVELOPMENT BUILD of owl. If you are using this  \n");
347  strcat(startupmsg, "build regularly, please add yourself to dirty-owl-hackers@mit.edu      \n");
348  strcat(startupmsg, "                                                                 ^ ^   \n");
349  strcat(startupmsg, "Any bugs should be reported to dirty-owl-hackers@mit.edu         OvO   \n");
350  strcat(startupmsg, "Do not seek help with this build from bug-owl or ktools.        (   )  \n");
351  strcat(startupmsg, "-----------------------------------------------------------------m-m---\n");
352  owl_function_adminmsg("", startupmsg);
353  sepbar(NULL);
354
355  wrefresh(sepwin);
356
357  /* load zephyr subs */
358  if (initialsubs) {
359    int ret2;
360    owl_function_debugmsg("startup: loading initial zephyr subs");
361
362    /* load default subscriptions */
363    ret=owl_zephyr_loaddefaultsubs();
364   
365    /* load subscriptions from subs file */
366    ret2=owl_zephyr_loadsubs(NULL, 0);
367
368    if (ret || ret2) {
369      owl_function_adminmsg("", "Error loading zephyr subscriptions");
370    } else if (ret2!=-1) {
371      owl_global_add_userclue(&g, OWL_USERCLUE_CLASSES);
372    }
373
374    /* load login subscriptions */
375    if (owl_global_is_loginsubs(&g)) {
376      owl_function_debugmsg("startup: loading login subs");
377      owl_function_loadloginsubs(NULL);
378    }
379  }
380
381  /* First buddy check to sync the list without notifications */
382  owl_function_debugmsg("startup: doing initial zephyr buddy check");
383  /* owl_function_zephyr_buddy_check(0); */
384
385  /* set the startup and default style, based on userclue and presence of a
386   * formatting function */
387  owl_function_debugmsg("startup: setting startup and default style");
388  if (0 != strcmp(owl_global_get_default_style(&g), "__unspecified__")) {
389    /* the style was set by the user: leave it alone */
390  } else if (owl_global_is_config_format(&g)) {
391    owl_global_set_default_style(&g, "perl");
392  } else if (owl_global_is_userclue(&g, OWL_USERCLUE_CLASSES)) {
393    owl_global_set_default_style(&g, "default");
394  } else {
395    owl_global_set_default_style(&g, "basic");
396  }
397
398  /* zlog in if we need to */
399  if (owl_global_is_startuplogin(&g)) {
400    owl_function_debugmsg("startup: doing zlog in");
401    owl_zephyr_zlog_in();
402  }
403
404  owl_function_debugmsg("startup: set style for the view");
405  owl_view_set_style(owl_global_get_current_view(&g), 
406                     owl_global_get_style_by_name(&g, owl_global_get_default_style(&g)));   
407
408  owl_function_debugmsg("startup: setting context interactive");
409  owl_context_set_interactive(owl_global_get_context(&g));
410
411  nexttimediff=10;
412  nexttime=time(NULL);
413
414  owl_function_debugmsg("startup: entering main loop");
415  /* main loop */
416  while (1) {
417
418    /* if a resize has been scheduled, deal with it */
419    owl_global_resize(&g, 0, 0);
420
421    /* these are here in case a resize changes the windows */
422    msgwin=owl_global_get_curs_msgwin(&g);
423    recwin=owl_global_get_curs_recwin(&g);
424    sepwin=owl_global_get_curs_sepwin(&g);
425    typwin=owl_global_get_curs_typwin(&g);
426
427    followlast=owl_global_should_followlast(&g);
428   
429    /* Do AIM stuff */
430    if (owl_global_is_doaimevents(&g)) {
431      owl_aim_process_events();
432
433      if (owl_global_is_aimloggedin(&g)) {
434        if (owl_timer_is_expired(owl_global_get_aim_buddyinfo_timer(&g))) {
435          /* owl_buddylist_request_idletimes(owl_global_get_buddylist(&g)); */
436          owl_timer_reset(owl_global_get_aim_buddyinfo_timer(&g));
437        }
438      }
439    }
440
441    owl_perlconfig_mainloop();
442
443    /* little hack */
444    now=time(NULL);
445    today=localtime(&now);
446    if (today->tm_mon==9 && today->tm_mday==31 && owl_global_get_runtime(&g)<600) {
447      if (time(NULL)>nexttime) {
448        if (nexttimediff==1) {
449          nexttimediff=10;
450        } else {
451          nexttimediff=1;
452        }
453        nexttime+=nexttimediff;
454        owl_hack_animate();
455      }
456    }
457
458    /* Grab incoming messages. */
459    newmsgs=0;
460    zpendcount=0;
461    while(owl_zephyr_zpending() || owl_global_messagequeue_pending(&g)) {
462#ifdef HAVE_LIBZEPHYR
463      struct sockaddr_in from;
464#endif
465      owl_message *m=NULL;
466      owl_filter *f;
467
468      /* grab the new message, stick it in 'm' */
469      if (owl_zephyr_zpending()) {
470#ifdef HAVE_LIBZEPHYR
471        /* grab a zephyr notice, but if we've done 20 without stopping,
472           take a break to process keystrokes etc. */
473        if (zpendcount>20) break;
474        ZReceiveNotice(&notice, &from);
475        zpendcount++;
476       
477        /* is this an ack from a zephyr we sent? */
478        if (owl_zephyr_notice_is_ack(&notice)) {
479          owl_zephyr_handle_ack(&notice);
480          continue;
481        }
482       
483        /* if it's a ping and we're not viewing pings then skip it */
484        if (!owl_global_is_rxping(&g) && !strcasecmp(notice.z_opcode, "ping")) {
485          continue;
486        }
487
488        /* create the new message */
489        m=owl_malloc(sizeof(owl_message));
490        owl_message_create_from_znotice(m, &notice);
491#endif
492      } else if (owl_global_messagequeue_pending(&g)) {
493        /* pick up the non-zephyr message in the message queue */
494        m=owl_global_messageuque_popmsg(&g);
495      } else {
496        /* Not supposed to happen, but we seem to get here on resizes */
497        owl_function_debugmsg("Bottomed out looking for zephyr");
498      }
499
500      /* If we didn't pick up a message for some reason, don't go on */
501      if (m==NULL) {
502        owl_function_debugmsg("m is null in main loop");
503        continue;
504      }
505     
506      /* if this message it on the puntlist, nuke it and continue */
507      if (owl_global_message_is_puntable(&g, m)) {
508        owl_message_free(m);
509        continue;
510      }
511
512      /*  login or logout that should be ignored? */
513      if (owl_global_is_ignorelogins(&g) && owl_message_is_loginout(m)) {
514        owl_message_free(m);
515        continue;
516      }
517
518      /* otherwise add it to the global list */
519      owl_messagelist_append_element(owl_global_get_msglist(&g), m);
520      newmsgs=1;
521
522      /* let the config know the new message has been received */
523      owl_perlconfig_getmsg(m, 0, NULL);
524
525      /* add it to any necessary views; right now there's only the current view */
526      owl_view_consider_message(owl_global_get_current_view(&g), m);
527
528      /* do we need to autoreply? */
529      if (owl_global_is_zaway(&g) && !owl_message_get_attribute_value(m, "isauto")) {
530        if (owl_message_is_type_zephyr(m)) {
531          owl_zephyr_zaway(m);
532        } else if (owl_message_is_type_aim(m)) {
533          if (owl_message_is_private(m)) {
534            owl_function_send_aimawymsg(owl_message_get_sender(m), owl_global_get_zaway_msg(&g));
535          }
536        }
537      }
538
539      /* ring the bell if it's a personal */
540      if (!strcmp(owl_global_get_personalbell(&g), "on")) {
541          if (!owl_message_is_loginout(m) &&
542              !owl_message_is_mail(m) &&
543              owl_message_is_private(m)) {
544            owl_function_beep();
545          }
546      } else if (!strcmp(owl_global_get_personalbell(&g), "off")) {
547        /* do nothing */
548      } else {
549        f=owl_global_get_filter(&g, owl_global_get_personalbell(&g));
550        if (f && owl_filter_message_match(f, m)) {
551          owl_function_beep();
552        }
553      }
554
555
556      /* if it matches the alert filter, do the alert action */
557      f=owl_global_get_filter(&g, owl_global_get_alert_filter(&g));
558      if (f && owl_filter_message_match(f, m)) {
559        owl_function_command(owl_global_get_alert_action(&g));
560      }
561
562      /* if it's a zephyr login or logout, update the zbuddylist */
563      if (owl_message_is_type_zephyr(m) && owl_message_is_loginout(m)) {
564        if (owl_message_is_login(m)) {
565          owl_zbuddylist_adduser(owl_global_get_zephyr_buddylist(&g), owl_message_get_sender(m));
566        } else if (owl_message_is_logout(m)) {
567          owl_zbuddylist_deluser(owl_global_get_zephyr_buddylist(&g), owl_message_get_sender(m));
568        } else {
569          owl_function_error("Internal error: received login notice that is neither login nor logout");
570        }
571      }
572
573      /* check for burning ears message */
574      /* this is an unsupported feature */
575      if (owl_global_is_burningears(&g) && owl_message_is_burningears(m)) {
576        char *buff;
577        buff = owl_sprintf("@i(Burning ears message on class %s)", owl_message_get_class(m));
578        owl_function_adminmsg(buff, "");
579        owl_free(buff);
580        owl_function_beep();
581      }
582
583      /* log the message if we need to */
584      owl_log_message(m);
585    }
586
587    /* is it time to check zbuddies? */
588    if (owl_global_is_pseudologins(&g)) {
589      if (owl_timer_is_expired(owl_global_get_zephyr_buddycheck_timer(&g))) {
590        owl_function_debugmsg("Doing zephyr buddy check");
591        owl_function_zephyr_buddy_check(1);
592        owl_timer_reset(owl_global_get_zephyr_buddycheck_timer(&g));
593      }
594    }
595
596    /* dispatch any muxevents */
597    owl_muxevents_dispatch(owl_global_get_muxevents(&g), 0);
598
599    /* follow the last message if we're supposed to */
600    if (newmsgs && followlast) {
601      owl_function_lastmsg_noredisplay();
602    }
603
604    /* do the newmsgproc thing */
605    if (newmsgs) {
606      owl_function_do_newmsgproc();
607    }
608   
609    /* redisplay if necessary */
610    /* this should be optimized to not run if the new messages won't be displayed */
611    if (newmsgs) {
612      owl_mainwin_redisplay(owl_global_get_mainwin(&g));
613      sepbar(NULL);
614      if (owl_popwin_is_active(owl_global_get_popwin(&g))) {
615        owl_popwin_refresh(owl_global_get_popwin(&g));
616        /* TODO: this is a broken kludge */
617        if (owl_global_get_viewwin(&g)) {
618          owl_viewwin_redisplay(owl_global_get_viewwin(&g), 0);
619        }
620      }
621      owl_global_set_needrefresh(&g);
622    }
623
624    /* if a popwin just came up, refresh it */
625    pw=owl_global_get_popwin(&g);
626    if (owl_popwin_is_active(pw) && owl_popwin_needs_first_refresh(pw)) {
627      owl_popwin_refresh(pw);
628      owl_popwin_no_needs_first_refresh(pw);
629      owl_global_set_needrefresh(&g);
630      /* TODO: this is a broken kludge */
631      if (owl_global_get_viewwin(&g)) {
632        owl_viewwin_redisplay(owl_global_get_viewwin(&g), 0);
633      }
634    }
635
636    /* update the terminal if we need to */
637    if (owl_global_is_needrefresh(&g)) {
638      /* leave the cursor in the appropriate window */
639      if (owl_global_is_typwin_active(&g)) {
640        owl_function_set_cursor(typwin);
641      } else {
642        owl_function_set_cursor(sepwin);
643      }
644      doupdate();
645      owl_global_set_noneedrefresh(&g);
646    }
647
648    /* Handle all keypresses.  If no key has been pressed, sleep for a
649     * little bit, but otherwise do not.  This lets input be grabbed
650     * as quickly as possbile */
651    j=wgetch(typwin);
652    if (j==ERR) {
653      usleep(10);
654    } else {
655      /* find and activate the current keymap.
656       * TODO: this should really get fixed by activating
657       * keymaps as we switch between windows...
658       */
659      if (pw && owl_popwin_is_active(pw) && owl_global_get_viewwin(&g)) {
660        owl_context_set_popless(owl_global_get_context(&g), 
661                                owl_global_get_viewwin(&g));
662        owl_function_activate_keymap("popless");
663      } else if (owl_global_is_typwin_active(&g) 
664                 && owl_editwin_get_style(tw)==OWL_EDITWIN_STYLE_ONELINE) {
665        /*
666          owl_context_set_editline(owl_global_get_context(&g), tw);
667          owl_function_activate_keymap("editline");
668        */
669      } else if (owl_global_is_typwin_active(&g) 
670                 && owl_editwin_get_style(tw)==OWL_EDITWIN_STYLE_MULTILINE) {
671        owl_context_set_editmulti(owl_global_get_context(&g), tw);
672        owl_function_activate_keymap("editmulti");
673      } else {
674        owl_context_set_recv(owl_global_get_context(&g));
675        owl_function_activate_keymap("recv");
676      }
677      /* now actually handle the keypress */
678      ret = owl_keyhandler_process(owl_global_get_keyhandler(&g), j);
679      if (ret!=0 && ret!=1) {
680        owl_function_makemsg("Unable to handle keypress");
681      }
682    }
683
684    /* Log any error signals */
685    {
686      siginfo_t si;
687      int signum;
688      if ((signum = owl_global_get_errsignal_and_clear(&g, &si)) > 0) {
689        owl_function_error("Got unexpected signal: %d %s  (code: %d band: %d  errno: %d)", 
690                           signum, signum==SIGPIPE?"SIGPIPE":"SIG????",
691                           si.si_code, si.si_band, si.si_errno);
692      }
693    }
694
695  }
696}
697
698void sig_handler(int sig, siginfo_t *si, void *data)
699{
700  if (sig==SIGWINCH) {
701    /* we can't inturrupt a malloc here, so it just sets a flag
702     * schedulding a resize for later
703     */
704    owl_function_resize();
705  } else if (sig==SIGPIPE || sig==SIGCHLD) {
706    /* Set a flag and some info that we got the sigpipe
707     * so we can record that we got it and why... */
708    owl_global_set_errsignal(&g, sig, si);
709  } else if (sig==SIGTERM || sig==SIGHUP) {
710    owl_function_quit();
711  }
712
713}
714
715void usage()
716{
717  fprintf(stderr, "Owl version %s\n", OWL_VERSION_STRING);
718  fprintf(stderr, "Usage: owl [-n] [-d] [-D] [-v] [-h] [-c <configfile>] [-t <ttyname>]\n");
719  fprintf(stderr, "  -n      don't load zephyr subscriptions\n");
720  fprintf(stderr, "  -d      enable debugging\n");
721  fprintf(stderr, "  -D      enable debugging and delete previous debug file\n");
722  fprintf(stderr, "  -v      print the Owl version number and exit\n");
723  fprintf(stderr, "  -h      print this help message\n");
724  fprintf(stderr, "  -c      specify an alternate config file\n");
725  fprintf(stderr, "  -t      set the tty name\n");
726}
727
728#if OWL_STDERR_REDIR
729
730/* Replaces stderr with a pipe so that we can read from it.
731 * Returns the fd of the pipe from which stderr can be read. */
732int stderr_replace(void)
733{
734  int pipefds[2];
735  if (0 != pipe(pipefds)) {
736    perror("pipe");
737    owl_function_debugmsg("stderr_replace: pipe FAILED\n");
738    return -1;
739  }
740    owl_function_debugmsg("stderr_replace: pipe: %d,%d\n", pipefds[0], pipefds[1]);
741  if (-1 == dup2(pipefds[1], 2 /*stderr*/)) {
742    owl_function_debugmsg("stderr_replace: dup2 FAILED (%s)\n", strerror(errno));
743    perror("dup2");
744    return -1;
745  }
746  return pipefds[0];
747}
748
749/* Sends stderr (read from rfd) messages to the error console */
750void stderr_redirect_handler(int handle, int rfd, int eventmask, void *data) 
751{
752  int navail, bread;
753  char *buf;
754  /*owl_function_debugmsg("stderr_redirect: called with rfd=%d\n", rfd);*/
755  if (rfd<0) return;
756  if (-1 == ioctl(rfd, FIONREAD, (void*)&navail)) {
757    return;
758  }
759  /*owl_function_debugmsg("stderr_redirect: navail = %d\n", navail);*/
760  if (navail<=0) return;
761  if (navail>256) { navail = 256; }
762  buf = owl_malloc(navail+1);
763  bread = read(rfd, buf, navail);
764  if (buf[navail-1] != '\0') {
765    buf[navail] = '\0';
766  }
767  owl_function_error("Err: %s", buf);
768  owl_free(buf);
769}
770
771#endif /* OWL_STDERR_REDIR */
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