source: owl.c @ 72c210f

barnowl_perlaimdebianrelease-1.4release-1.5release-1.6release-1.7release-1.8release-1.9
Last change on this file since 72c210f was 72c210f, checked in by Nelson Elhage <nelhage@mit.edu>, 14 years ago
Let's not segfault if the user asks for a nonexistant style in .owl/startup
  • Property mode set to 100644
File size: 25.0 KB
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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    int bg = COLOR_BLACK;
180#ifdef HAVE_USE_DEFAULT_COLORS
181    bg = -1;
182#endif
183    init_pair(OWL_COLOR_BLACK,   COLOR_BLACK,   bg);
184    init_pair(OWL_COLOR_RED,     COLOR_RED,     bg);
185    init_pair(OWL_COLOR_GREEN,   COLOR_GREEN,   bg);
186    init_pair(OWL_COLOR_YELLOW,  COLOR_YELLOW,  bg);
187    init_pair(OWL_COLOR_BLUE,    COLOR_BLUE,    bg);
188    init_pair(OWL_COLOR_MAGENTA, COLOR_MAGENTA, bg);
189    init_pair(OWL_COLOR_CYAN,    COLOR_CYAN,    bg);
190    init_pair(OWL_COLOR_WHITE,   COLOR_WHITE,   bg);
191  }
192
193  /* owl global init */
194  owl_global_init(&g);
195    if (debug) owl_global_set_debug_on(&g);
196  owl_function_debugmsg("startup: first available debugging message");
197  owl_global_set_startupargs(&g, argcsave, argvsave);
198  owl_global_set_haveaim(&g);
199
200#ifdef HAVE_LIBZEPHYR
201  /* zephyr init */
202  ret=owl_zephyr_initialize();
203  if (!ret)
204      owl_global_set_havezephyr(&g);
205#endif
206
207#if OWL_STDERR_REDIR
208  /* Do this only after we've started curses up... */
209  owl_function_debugmsg("startup: doing stderr redirection");
210  newstderr = stderr_replace();
211  owl_muxevents_add(owl_global_get_muxevents(&g), newstderr, OWL_MUX_READ,
212                    stderr_redirect_handler, NULL);
213#endif   
214
215  /* create the owl directory, in case it does not exist */
216  owl_function_debugmsg("startup: creating owl directory, if not present");
217  dir=owl_sprintf("%s/%s", owl_global_get_homedir(&g), OWL_CONFIG_DIR);
218  mkdir(dir, S_IRWXU);
219  owl_free(dir);
220
221  /* set the tty, either from the command line, or by figuring it out */
222  owl_function_debugmsg("startup: setting tty name");
223  if (tty) {
224    owl_global_set_tty(&g, tty);
225  } else {
226    owl_global_set_tty(&g, owl_util_get_default_tty());
227  }
228
229  /* Initialize perl */
230  owl_function_debugmsg("startup: processing config file");
231  owl_context_set_readconfig(owl_global_get_context(&g));
232  perlerr=owl_perlconfig_initperl(configfile);
233  if (perlerr) {
234    endwin();
235    owl_function_error("Internal perl error: %s\n", perlerr);
236    fprintf(stderr, "Internal perl error: %s\n", perlerr);
237    fflush(stderr);
238    printf("Internal perl error: %s\n", perlerr);
239    fflush(stdout);
240    exit(1);
241  }
242
243  /* setup the built-in styles */
244  owl_function_debugmsg("startup: creating built-in styles");
245
246  s=owl_malloc(sizeof(owl_style));
247  owl_style_create_internal(s, "basic", &owl_stylefunc_basic, "Basic message formatting.");
248  owl_global_add_style(&g, s);
249#if 0
250  s=owl_malloc(sizeof(owl_style));
251  owl_style_create_internal(s, "vt", &owl_stylefunc_vt, "VT message formatting.");
252  owl_global_add_style(&g, s);
253#endif
254  s=owl_malloc(sizeof(owl_style));
255  owl_style_create_internal(s, "oneline", &owl_stylefunc_oneline, "Formats for one-line-per-message");
256  owl_global_add_style(&g, s);
257
258  /* setup the default filters */
259  /* the personal filter will need to change again when AIM chat's are
260   *  included.  Also, there should be an %aimme% */
261  owl_function_debugmsg("startup: creating default filters");
262  f=owl_malloc(sizeof(owl_filter));
263  owl_filter_init_fromstring(f, "personal", "isprivate ^true$");
264  owl_list_append_element(owl_global_get_filterlist(&g), f);
265
266  f=owl_malloc(sizeof(owl_filter));
267  owl_filter_init_fromstring(f, "wordwrap", "not ( type ^admin$ or type ^zephyr$ ) ");
268  owl_list_append_element(owl_global_get_filterlist(&g), f);
269
270  f=owl_malloc(sizeof(owl_filter));
271  owl_filter_init_fromstring(f, "trash", "class ^mail$ or opcode ^ping$ or type ^admin$ or ( not login ^none$ )");
272  owl_list_append_element(owl_global_get_filterlist(&g), f);
273
274  f=owl_malloc(sizeof(owl_filter));
275  owl_filter_init_fromstring(f, "ping", "opcode ^ping$");
276  owl_list_append_element(owl_global_get_filterlist(&g), f);
277
278  f=owl_malloc(sizeof(owl_filter));
279  owl_filter_init_fromstring(f, "auto", "opcode ^auto$");
280  owl_list_append_element(owl_global_get_filterlist(&g), f);
281
282  f=owl_malloc(sizeof(owl_filter));
283  owl_filter_init_fromstring(f, "login", "not login ^none$");
284  owl_list_append_element(owl_global_get_filterlist(&g), f);
285
286  f=owl_malloc(sizeof(owl_filter));
287  owl_filter_init_fromstring(f, "reply-lockout", "class ^noc or class ^mail$");
288  owl_list_append_element(owl_global_get_filterlist(&g), f);
289
290  f=owl_malloc(sizeof(owl_filter));
291  owl_filter_init_fromstring(f, "out", "direction ^out$");
292  owl_list_append_element(owl_global_get_filterlist(&g), f);
293
294  f=owl_malloc(sizeof(owl_filter));
295  owl_filter_init_fromstring(f, "aim", "type ^aim$");
296  owl_list_append_element(owl_global_get_filterlist(&g), f);
297
298  f=owl_malloc(sizeof(owl_filter));
299  owl_filter_init_fromstring(f, "zephyr", "type ^zephyr$");
300  owl_list_append_element(owl_global_get_filterlist(&g), f);
301
302  f=owl_malloc(sizeof(owl_filter));
303  owl_filter_init_fromstring(f, "none", "false");
304  owl_list_append_element(owl_global_get_filterlist(&g), f);
305
306  f=owl_malloc(sizeof(owl_filter));
307  owl_filter_init_fromstring(f, "all", "true");
308  owl_list_append_element(owl_global_get_filterlist(&g), f);
309
310  /* set the current view */
311  owl_function_debugmsg("startup: setting the current view");
312  owl_view_create(owl_global_get_current_view(&g), "main", f, owl_global_get_style_by_name(&g, "default"));
313
314  /* AIM init */
315  owl_function_debugmsg("startup: doing AIM initialization");
316  owl_aim_init();
317
318  /* execute the startup function in the configfile */
319  owl_function_debugmsg("startup: executing perl startup, if applicable");
320  perlout = owl_perlconfig_execute("BarnOwl::Hooks::_startup();");
321  if (perlout) owl_free(perlout);
322
323  /* hold on to the window names for convenience */
324  msgwin=owl_global_get_curs_msgwin(&g);
325  recwin=owl_global_get_curs_recwin(&g);
326  sepwin=owl_global_get_curs_sepwin(&g);
327  typwin=owl_global_get_curs_typwin(&g);
328  tw=owl_global_get_typwin(&g);
329
330  /* welcome message */
331  owl_function_debugmsg("startup: creating splash message");
332  strcpy(startupmsg, "-----------------------------------------------------------------------\n");
333  sprintf(buff,      "Welcome to barnowl version %s.  Press 'h' for on-line help. \n", OWL_VERSION_STRING);
334  strcat(startupmsg, buff);
335  strcat(startupmsg, "                                                                       \n");
336  strcat(startupmsg, "This is a development build of barnowl. If you are using this  \n");
337  strcat(startupmsg, "build regularly, please add yourself to barnowl-users@mit.edu      \n");
338  strcat(startupmsg, "                                                                 ^ ^   \n");
339  strcat(startupmsg, "                                                                 OvO   \n");
340  strcat(startupmsg, "Please report any bugs to dirty-owl-hackers@mit.edu             (   )  \n");
341  strcat(startupmsg, "-----------------------------------------------------------------m-m---\n");
342  owl_function_adminmsg("", startupmsg);
343  sepbar(NULL);
344
345  /* process the startup file */
346  owl_function_debugmsg("startup: processing startup file");
347  owl_function_source(NULL);
348
349  wrefresh(sepwin);
350
351  /* load zephyr subs */
352  if (initialsubs) {
353    int ret2;
354    owl_function_debugmsg("startup: loading initial zephyr subs");
355
356    /* load default subscriptions */
357    ret=owl_zephyr_loaddefaultsubs();
358   
359    /* load subscriptions from subs file */
360    ret2=owl_zephyr_loadsubs(NULL, 0);
361
362    if (ret || ret2) {
363      owl_function_adminmsg("", "Error loading zephyr subscriptions");
364    } else if (ret2!=-1) {
365      owl_global_add_userclue(&g, OWL_USERCLUE_CLASSES);
366    }
367
368    /* load login subscriptions */
369    if (owl_global_is_loginsubs(&g)) {
370      owl_function_debugmsg("startup: loading login subs");
371      owl_function_loadloginsubs(NULL);
372    }
373  }
374
375  /* First buddy check to sync the list without notifications */
376  owl_function_debugmsg("startup: doing initial zephyr buddy check");
377  /* owl_function_zephyr_buddy_check(0); */
378
379  /* set the startup and default style, based on userclue and presence of a
380   * formatting function */
381  owl_function_debugmsg("startup: setting startup and default style");
382  if (0 != strcmp(owl_global_get_default_style(&g), "__unspecified__")) {
383    /* the style was set by the user: leave it alone */
384  } else if (owl_global_is_config_format(&g)) {
385    owl_global_set_default_style(&g, "perl");
386  } else if (owl_global_is_userclue(&g, OWL_USERCLUE_CLASSES)) {
387    owl_global_set_default_style(&g, "default");
388  } else {
389    owl_global_set_default_style(&g, "basic");
390  }
391
392  /* zlog in if we need to */
393  if (owl_global_is_startuplogin(&g)) {
394    owl_function_debugmsg("startup: doing zlog in");
395    owl_zephyr_zlog_in();
396  }
397
398  owl_function_debugmsg("startup: set style for the view: %s", owl_global_get_default_style(&g));
399  s = owl_global_get_style_by_name(&g, owl_global_get_default_style(&g));
400  if(s)
401      owl_view_set_style(owl_global_get_current_view(&g), s);
402  else
403      owl_function_error("No such style: %s", owl_global_get_default_style(&g));
404
405  owl_function_debugmsg("startup: setting context interactive");
406  owl_context_set_interactive(owl_global_get_context(&g));
407
408  nexttimediff=10;
409  nexttime=time(NULL);
410
411  owl_function_debugmsg("startup: entering main loop");
412  /* main loop */
413  while (1) {
414
415    /* if a resize has been scheduled, deal with it */
416    owl_global_resize(&g, 0, 0);
417
418    /* these are here in case a resize changes the windows */
419    msgwin=owl_global_get_curs_msgwin(&g);
420    recwin=owl_global_get_curs_recwin(&g);
421    sepwin=owl_global_get_curs_sepwin(&g);
422    typwin=owl_global_get_curs_typwin(&g);
423
424    followlast=owl_global_should_followlast(&g);
425   
426    /* Do AIM stuff */
427    if (owl_global_is_doaimevents(&g)) {
428      owl_aim_process_events();
429
430      if (owl_global_is_aimloggedin(&g)) {
431        if (owl_timer_is_expired(owl_global_get_aim_buddyinfo_timer(&g))) {
432          /* owl_buddylist_request_idletimes(owl_global_get_buddylist(&g)); */
433          owl_timer_reset(owl_global_get_aim_buddyinfo_timer(&g));
434        }
435      }
436    }
437
438    owl_perlconfig_mainloop();
439
440    /* little hack */
441    now=time(NULL);
442    today=localtime(&now);
443    if (today->tm_mon==9 && today->tm_mday==31 && owl_global_get_runtime(&g)<600) {
444      if (time(NULL)>nexttime) {
445        if (nexttimediff==1) {
446          nexttimediff=10;
447        } else {
448          nexttimediff=1;
449        }
450        nexttime+=nexttimediff;
451        owl_hack_animate();
452      }
453    }
454
455    /* Grab incoming messages. */
456    newmsgs=0;
457    zpendcount=0;
458    while(owl_zephyr_zpending() || owl_global_messagequeue_pending(&g)) {
459#ifdef HAVE_LIBZEPHYR
460      struct sockaddr_in from;
461#endif
462      owl_message *m=NULL;
463      owl_filter *f;
464
465      /* grab the new message, stick it in 'm' */
466      if (owl_zephyr_zpending()) {
467#ifdef HAVE_LIBZEPHYR
468        /* grab a zephyr notice, but if we've done 20 without stopping,
469           take a break to process keystrokes etc. */
470        if (zpendcount>20) break;
471        ZReceiveNotice(&notice, &from);
472        zpendcount++;
473       
474        /* is this an ack from a zephyr we sent? */
475        if (owl_zephyr_notice_is_ack(&notice)) {
476          owl_zephyr_handle_ack(&notice);
477          continue;
478        }
479       
480        /* if it's a ping and we're not viewing pings then skip it */
481        if (!owl_global_is_rxping(&g) && !strcasecmp(notice.z_opcode, "ping")) {
482          continue;
483        }
484
485        /* create the new message */
486        m=owl_malloc(sizeof(owl_message));
487        owl_message_create_from_znotice(m, &notice);
488#endif
489      } else if (owl_global_messagequeue_pending(&g)) {
490        /* pick up the non-zephyr message in the message queue */
491        m=owl_global_messageuque_popmsg(&g);
492      } else {
493        /* Not supposed to happen, but we seem to get here on resizes */
494        owl_function_debugmsg("Bottomed out looking for zephyr");
495      }
496
497      /* If we didn't pick up a message for some reason, don't go on */
498      if (m==NULL) {
499        owl_function_debugmsg("m is null in main loop");
500        continue;
501      }
502     
503      /* if this message it on the puntlist, nuke it and continue */
504      if (owl_global_message_is_puntable(&g, m)) {
505        owl_message_free(m);
506        continue;
507      }
508
509      /*  login or logout that should be ignored? */
510      if (owl_global_is_ignorelogins(&g) && owl_message_is_loginout(m)) {
511        owl_message_free(m);
512        continue;
513      }
514
515      /* otherwise add it to the global list */
516      owl_messagelist_append_element(owl_global_get_msglist(&g), m);
517      newmsgs=1;
518
519      /* let the config know the new message has been received */
520      owl_perlconfig_getmsg(m, 0, NULL);
521
522      /* add it to any necessary views; right now there's only the current view */
523      owl_view_consider_message(owl_global_get_current_view(&g), m);
524
525      /* do we need to autoreply? */
526      if (owl_global_is_zaway(&g) && !owl_message_get_attribute_value(m, "isauto")) {
527        if (owl_message_is_type_zephyr(m)) {
528          owl_zephyr_zaway(m);
529        } else if (owl_message_is_type_aim(m)) {
530          if (owl_message_is_private(m)) {
531            owl_function_send_aimawymsg(owl_message_get_sender(m), owl_global_get_zaway_msg(&g));
532          }
533        }
534      }
535
536      /* ring the bell if it's a personal */
537      if (!strcmp(owl_global_get_personalbell(&g), "on")) {
538          if (!owl_message_is_loginout(m) &&
539              !owl_message_is_mail(m) &&
540              owl_message_is_private(m)) {
541            owl_function_beep();
542          }
543      } else if (!strcmp(owl_global_get_personalbell(&g), "off")) {
544        /* do nothing */
545      } else {
546        f=owl_global_get_filter(&g, owl_global_get_personalbell(&g));
547        if (f && owl_filter_message_match(f, m)) {
548          owl_function_beep();
549        }
550      }
551
552
553      /* if it matches the alert filter, do the alert action */
554      f=owl_global_get_filter(&g, owl_global_get_alert_filter(&g));
555      if (f && owl_filter_message_match(f, m)) {
556        owl_function_command(owl_global_get_alert_action(&g));
557      }
558
559      /* if it's a zephyr login or logout, update the zbuddylist */
560      if (owl_message_is_type_zephyr(m) && owl_message_is_loginout(m)) {
561        if (owl_message_is_login(m)) {
562          owl_zbuddylist_adduser(owl_global_get_zephyr_buddylist(&g), owl_message_get_sender(m));
563        } else if (owl_message_is_logout(m)) {
564          owl_zbuddylist_deluser(owl_global_get_zephyr_buddylist(&g), owl_message_get_sender(m));
565        } else {
566          owl_function_error("Internal error: received login notice that is neither login nor logout");
567        }
568      }
569
570      /* check for burning ears message */
571      /* this is an unsupported feature */
572      if (owl_global_is_burningears(&g) && owl_message_is_burningears(m)) {
573        char *buff;
574        buff = owl_sprintf("@i(Burning ears message on class %s)", owl_message_get_class(m));
575        owl_function_adminmsg(buff, "");
576        owl_free(buff);
577        owl_function_beep();
578      }
579
580      /* log the message if we need to */
581      owl_log_message(m);
582    }
583
584    /* is it time to check zbuddies? */
585    if (owl_global_is_pseudologins(&g)) {
586      if (owl_timer_is_expired(owl_global_get_zephyr_buddycheck_timer(&g))) {
587        owl_function_debugmsg("Doing zephyr buddy check");
588        owl_function_zephyr_buddy_check(1);
589        owl_timer_reset(owl_global_get_zephyr_buddycheck_timer(&g));
590      }
591    }
592
593    /* dispatch any muxevents */
594    owl_muxevents_dispatch(owl_global_get_muxevents(&g), 0);
595
596    /* follow the last message if we're supposed to */
597    if (newmsgs && followlast) {
598      owl_function_lastmsg_noredisplay();
599    }
600
601    /* do the newmsgproc thing */
602    if (newmsgs) {
603      owl_function_do_newmsgproc();
604    }
605   
606    /* redisplay if necessary */
607    /* this should be optimized to not run if the new messages won't be displayed */
608    if (newmsgs) {
609      owl_mainwin_redisplay(owl_global_get_mainwin(&g));
610      sepbar(NULL);
611      if (owl_popwin_is_active(owl_global_get_popwin(&g))) {
612        owl_popwin_refresh(owl_global_get_popwin(&g));
613        /* TODO: this is a broken kludge */
614        if (owl_global_get_viewwin(&g)) {
615          owl_viewwin_redisplay(owl_global_get_viewwin(&g), 0);
616        }
617      }
618      owl_global_set_needrefresh(&g);
619    }
620
621    /* if a popwin just came up, refresh it */
622    pw=owl_global_get_popwin(&g);
623    if (owl_popwin_is_active(pw) && owl_popwin_needs_first_refresh(pw)) {
624      owl_popwin_refresh(pw);
625      owl_popwin_no_needs_first_refresh(pw);
626      owl_global_set_needrefresh(&g);
627      /* TODO: this is a broken kludge */
628      if (owl_global_get_viewwin(&g)) {
629        owl_viewwin_redisplay(owl_global_get_viewwin(&g), 0);
630      }
631    }
632
633    /* update the terminal if we need to */
634    if (owl_global_is_needrefresh(&g)) {
635      /* leave the cursor in the appropriate window */
636      if (owl_global_is_typwin_active(&g)) {
637        owl_function_set_cursor(typwin);
638      } else {
639        owl_function_set_cursor(sepwin);
640      }
641      doupdate();
642      owl_global_set_noneedrefresh(&g);
643    }
644
645    /* Handle all keypresses.  If no key has been pressed, sleep for a
646     * little bit, but otherwise do not.  This lets input be grabbed
647     * as quickly as possbile */
648    j=wgetch(typwin);
649    if (j==ERR) {
650      usleep(10);
651    } else {
652      owl_global_update_lastinputtime(&g);
653      /* find and activate the current keymap.
654       * TODO: this should really get fixed by activating
655       * keymaps as we switch between windows...
656       */
657      if (pw && owl_popwin_is_active(pw) && owl_global_get_viewwin(&g)) {
658        owl_context_set_popless(owl_global_get_context(&g), 
659                                owl_global_get_viewwin(&g));
660        owl_function_activate_keymap("popless");
661      } else if (owl_global_is_typwin_active(&g) 
662                 && owl_editwin_get_style(tw)==OWL_EDITWIN_STYLE_ONELINE) {
663        /*
664          owl_context_set_editline(owl_global_get_context(&g), tw);
665          owl_function_activate_keymap("editline");
666        */
667      } else if (owl_global_is_typwin_active(&g) 
668                 && owl_editwin_get_style(tw)==OWL_EDITWIN_STYLE_MULTILINE) {
669        owl_context_set_editmulti(owl_global_get_context(&g), tw);
670        owl_function_activate_keymap("editmulti");
671      } else {
672        owl_context_set_recv(owl_global_get_context(&g));
673        owl_function_activate_keymap("recv");
674      }
675      /* now actually handle the keypress */
676      ret = owl_keyhandler_process(owl_global_get_keyhandler(&g), j);
677      if (ret!=0 && ret!=1) {
678        owl_function_makemsg("Unable to handle keypress");
679      }
680    }
681
682    /* Log any error signals */
683    {
684      siginfo_t si;
685      int signum;
686      if ((signum = owl_global_get_errsignal_and_clear(&g, &si)) > 0) {
687        owl_function_error("Got unexpected signal: %d %s  (code: %d band: %d  errno: %d)", 
688                           signum, signum==SIGPIPE?"SIGPIPE":"SIG????",
689                           si.si_code, si.si_band, si.si_errno);
690      }
691    }
692
693  }
694}
695
696void sig_handler(int sig, siginfo_t *si, void *data)
697{
698  if (sig==SIGWINCH) {
699    /* we can't inturrupt a malloc here, so it just sets a flag
700     * schedulding a resize for later
701     */
702    owl_function_resize();
703  } else if (sig==SIGPIPE || sig==SIGCHLD) {
704    /* Set a flag and some info that we got the sigpipe
705     * so we can record that we got it and why... */
706    owl_global_set_errsignal(&g, sig, si);
707  } else if (sig==SIGTERM || sig==SIGHUP) {
708    owl_function_quit();
709  }
710
711}
712
713void usage()
714{
715  fprintf(stderr, "Owl version %s\n", OWL_VERSION_STRING);
716  fprintf(stderr, "Usage: owl [-n] [-d] [-D] [-v] [-h] [-c <configfile>] [-t <ttyname>]\n");
717  fprintf(stderr, "  -n      don't load zephyr subscriptions\n");
718  fprintf(stderr, "  -d      enable debugging\n");
719  fprintf(stderr, "  -D      enable debugging and delete previous debug file\n");
720  fprintf(stderr, "  -v      print the Owl version number and exit\n");
721  fprintf(stderr, "  -h      print this help message\n");
722  fprintf(stderr, "  -c      specify an alternate config file\n");
723  fprintf(stderr, "  -t      set the tty name\n");
724}
725
726#if OWL_STDERR_REDIR
727
728/* Replaces stderr with a pipe so that we can read from it.
729 * Returns the fd of the pipe from which stderr can be read. */
730int stderr_replace(void)
731{
732  int pipefds[2];
733  if (0 != pipe(pipefds)) {
734    perror("pipe");
735    owl_function_debugmsg("stderr_replace: pipe FAILED\n");
736    return -1;
737  }
738    owl_function_debugmsg("stderr_replace: pipe: %d,%d\n", pipefds[0], pipefds[1]);
739  if (-1 == dup2(pipefds[1], 2 /*stderr*/)) {
740    owl_function_debugmsg("stderr_replace: dup2 FAILED (%s)\n", strerror(errno));
741    perror("dup2");
742    return -1;
743  }
744  return pipefds[0];
745}
746
747/* Sends stderr (read from rfd) messages to the error console */
748void stderr_redirect_handler(int handle, int rfd, int eventmask, void *data) 
749{
750  int navail, bread;
751  char *buf;
752  /*owl_function_debugmsg("stderr_redirect: called with rfd=%d\n", rfd);*/
753  if (rfd<0) return;
754  if (-1 == ioctl(rfd, FIONREAD, (void*)&navail)) {
755    return;
756  }
757  /*owl_function_debugmsg("stderr_redirect: navail = %d\n", navail);*/
758  if (navail<=0) return;
759  if (navail>256) { navail = 256; }
760  buf = owl_malloc(navail+1);
761  bread = read(rfd, buf, navail);
762  if (buf[navail-1] != '\0') {
763    buf[navail] = '\0';
764  }
765  owl_function_error("Err: %s", buf);
766  owl_free(buf);
767}
768
769#endif /* OWL_STDERR_REDIR */
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