source: owl.c @ 215c119

release-1.4release-1.5release-1.6release-1.7release-1.8release-1.9
Last change on this file since 215c119 was 4e4847c, checked in by Nelson Elhage <nelhage@mit.edu>, 12 years ago
Don't include owl.c when running codelist.
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File size: 21.6 KB
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1/*  Copyright (c) 2006-2009 The BarnOwl Developers. All rights reserved.
2 *  Copyright (c) 2004 James Kretchmar. All rights reserved.
3 *
4 *  This program is free software. You can redistribute it and/or
5 *  modify under the terms of the Sleepycat License. See the COPYING
6 *  file included with the distribution for more information.
7 */
8
9#include <stdio.h>
10#include <unistd.h>
11#include <getopt.h>
12#include <stdlib.h>
13#include <string.h>
14#include <signal.h>
15#include <time.h>
16#include <sys/param.h>
17#include <sys/types.h>
18#include <sys/time.h>
19#include <termios.h>
20#include <sys/stat.h>
21#include <locale.h>
22#include "owl.h"
23
24
25#if OWL_STDERR_REDIR
26#ifdef HAVE_SYS_IOCTL_H
27#include <sys/ioctl.h>
28#endif
29#ifdef HAVE_SYS_FILIO_H
30#include <sys/filio.h>
31#endif
32int stderr_replace(void);
33#endif
34
35#define STDIN 0
36
37owl_global g;
38
39typedef struct _owl_options {
40  bool load_initial_subs;
41  char *configfile;
42  char *tty;
43  char *confdir;
44  bool debug;
45  bool rm_debug;
46} owl_options;
47
48void usage()
49{
50  fprintf(stderr, "Barnowl version %s\n", OWL_VERSION_STRING);
51  fprintf(stderr, "Usage: barnowl [-n] [-d] [-D] [-v] [-h] [-c <configfile>] [-s <confdir>] [-t <ttyname>]\n");
52  fprintf(stderr, "  -n,--no-subs        don't load zephyr subscriptions\n");
53  fprintf(stderr, "  -d,--debug          enable debugging\n");
54  fprintf(stderr, "  -D,--remove-debug   enable debugging and delete previous debug file\n");
55  fprintf(stderr, "  -v,--version        print the Barnowl version number and exit\n");
56  fprintf(stderr, "  -h,--help           print this help message\n");
57  fprintf(stderr, "  -c,--config-file    specify an alternate config file\n");
58  fprintf(stderr, "  -s,--config-dir     specify an alternate config dir (default ~/.owl)\n");
59  fprintf(stderr, "  -t,--tty            set the tty name\n");
60}
61
62/* TODO: free owl_options after init is done? */
63void owl_parse_options(int argc, char *argv[], owl_options *opts) {
64  static const struct option long_options[] = {
65    { "no-subs",         0, 0, 'n' },
66    { "config-file",     1, 0, 'c' },
67    { "config-dir",      1, 0, 's' },
68    { "tty",             1, 0, 't' },
69    { "debug",           0, 0, 'd' },
70    { "remove-debug",    0, 0, 'D' },
71    { "version",         0, 0, 'v' },
72    { "help",            0, 0, 'h' },
73    { NULL, 0, NULL, 0}
74  };
75  char c;
76
77  while((c = getopt_long(argc, argv, "nc:t:s:dDvh",
78                         long_options, NULL)) != -1) {
79    switch(c) {
80    case 'n':
81      opts->load_initial_subs = 0;
82      break;
83    case 'c':
84      opts->configfile = owl_strdup(optarg);
85      break;
86    case 's':
87      opts->confdir = owl_strdup(optarg);
88      break;
89    case 't':
90      opts->tty = owl_strdup(optarg);
91      break;
92    case 'D':
93      opts->rm_debug = 1;
94      /* fallthrough */
95    case 'd':
96      opts->debug = 1;
97      break;
98    case 'v':
99      printf("This is barnowl version %s\n", OWL_VERSION_STRING);
100      exit(0);
101    case 'h':
102    default:
103      usage();
104      exit(1);
105    }
106  }
107}
108
109void owl_start_color(void) {
110  start_color();
111#ifdef HAVE_USE_DEFAULT_COLORS
112  use_default_colors();
113#endif
114
115  /* define simple color pairs */
116  if (has_colors() && COLOR_PAIRS>=8) {
117    int bg = COLOR_BLACK;
118#ifdef HAVE_USE_DEFAULT_COLORS
119    bg = -1;
120#endif
121    init_pair(OWL_COLOR_BLACK,   COLOR_BLACK,   bg);
122    init_pair(OWL_COLOR_RED,     COLOR_RED,     bg);
123    init_pair(OWL_COLOR_GREEN,   COLOR_GREEN,   bg);
124    init_pair(OWL_COLOR_YELLOW,  COLOR_YELLOW,  bg);
125    init_pair(OWL_COLOR_BLUE,    COLOR_BLUE,    bg);
126    init_pair(OWL_COLOR_MAGENTA, COLOR_MAGENTA, bg);
127    init_pair(OWL_COLOR_CYAN,    COLOR_CYAN,    bg);
128    init_pair(OWL_COLOR_WHITE,   COLOR_WHITE,   bg);
129  }
130}
131
132void owl_start_curses(void) {
133  struct termios tio;
134  /* save initial terminal settings */
135  tcgetattr(0, owl_global_get_startup_tio(&g));
136
137  /* turn ISTRIP off */
138  tcgetattr(0, &tio);
139  tio.c_iflag &= ~(ISTRIP|IEXTEN);
140  tio.c_cc[VQUIT] = 0;
141  tcsetattr(0, TCSAFLUSH, &tio);
142
143  /* screen init */
144  initscr();
145  cbreak();
146  noecho();
147
148  owl_start_color();
149}
150
151void owl_setup_default_filters(void) {
152  owl_filter *f;
153
154  owl_function_debugmsg("startup: creating default filters");
155  f=owl_malloc(sizeof(owl_filter));
156  owl_filter_init_fromstring(f, "personal", "isprivate ^true$ and ( not type ^zephyr$"
157                             " or ( class ^message  ) )");
158  owl_list_append_element(owl_global_get_filterlist(&g), f);
159
160  f=owl_malloc(sizeof(owl_filter));
161  owl_filter_init_fromstring(f, "wordwrap", "not ( type ^admin$ or type ^zephyr$ ) ");
162  owl_list_append_element(owl_global_get_filterlist(&g), f);
163
164  f=owl_malloc(sizeof(owl_filter));
165  owl_filter_init_fromstring(f, "trash", "class ^mail$ or opcode ^ping$ or type ^admin$ or ( not login ^none$ )");
166  owl_list_append_element(owl_global_get_filterlist(&g), f);
167
168  f=owl_malloc(sizeof(owl_filter));
169  owl_filter_init_fromstring(f, "ping", "opcode ^ping$");
170  owl_list_append_element(owl_global_get_filterlist(&g), f);
171
172  f=owl_malloc(sizeof(owl_filter));
173  owl_filter_init_fromstring(f, "auto", "opcode ^auto$");
174  owl_list_append_element(owl_global_get_filterlist(&g), f);
175
176  f=owl_malloc(sizeof(owl_filter));
177  owl_filter_init_fromstring(f, "login", "not login ^none$");
178  owl_list_append_element(owl_global_get_filterlist(&g), f);
179
180  f=owl_malloc(sizeof(owl_filter));
181  owl_filter_init_fromstring(f, "reply-lockout", "class ^noc or class ^mail$");
182  owl_list_append_element(owl_global_get_filterlist(&g), f);
183
184  f=owl_malloc(sizeof(owl_filter));
185  owl_filter_init_fromstring(f, "out", "direction ^out$");
186  owl_list_append_element(owl_global_get_filterlist(&g), f);
187
188  f=owl_malloc(sizeof(owl_filter));
189  owl_filter_init_fromstring(f, "aim", "type ^aim$");
190  owl_list_append_element(owl_global_get_filterlist(&g), f);
191
192  f=owl_malloc(sizeof(owl_filter));
193  owl_filter_init_fromstring(f, "zephyr", "type ^zephyr$");
194  owl_list_append_element(owl_global_get_filterlist(&g), f);
195
196  f=owl_malloc(sizeof(owl_filter));
197  owl_filter_init_fromstring(f, "none", "false");
198  owl_list_append_element(owl_global_get_filterlist(&g), f);
199
200  f=owl_malloc(sizeof(owl_filter));
201  owl_filter_init_fromstring(f, "all", "true");
202  owl_list_append_element(owl_global_get_filterlist(&g), f);
203}
204
205/*
206 * Process a new message passed to us on the message queue from some
207 * protocol. This includes adding it to the message list, updating the
208 * view and scrolling if appropriate, logging it, and so on.
209 *
210 * Either a pointer is kept to the message internally, or it is freed
211 * if unneeded. The caller no longer ``owns'' the message's memory.
212 *
213 * Returns 1 if the message was added to the message list, and 0 if it
214 * was ignored due to user settings or otherwise.
215 */
216int owl_process_message(owl_message *m) {
217  const owl_filter *f;
218  /* if this message it on the puntlist, nuke it and continue */
219  if (owl_global_message_is_puntable(&g, m)) {
220    owl_message_free(m);
221    return 0;
222  }
223
224  /*  login or logout that should be ignored? */
225  if (owl_global_is_ignorelogins(&g)
226      && owl_message_is_loginout(m)) {
227    owl_message_free(m);
228    return 0;
229  }
230
231  if (!owl_global_is_displayoutgoing(&g)
232      && owl_message_is_direction_out(m)) {
233    owl_message_free(m);
234    return 0;
235  }
236
237  /* add it to the global list */
238  owl_messagelist_append_element(owl_global_get_msglist(&g), m);
239  /* add it to any necessary views; right now there's only the current view */
240  owl_view_consider_message(owl_global_get_current_view(&g), m);
241
242  if(owl_message_is_direction_in(m)) {
243    /* let perl know about it*/
244    owl_perlconfig_getmsg(m, NULL);
245
246    /* do we need to autoreply? */
247    if (owl_global_is_zaway(&g) && !owl_message_get_attribute_value(m, "isauto")) {
248      if (owl_message_is_type_zephyr(m)) {
249        owl_zephyr_zaway(m);
250      } else if (owl_message_is_type_aim(m)) {
251        if (owl_message_is_private(m)) {
252          owl_function_send_aimawymsg(owl_message_get_sender(m), owl_global_get_zaway_msg(&g));
253        }
254      }
255    }
256
257    /* ring the bell if it's a personal */
258    if (!strcmp(owl_global_get_personalbell(&g), "on")) {
259      if (!owl_message_is_loginout(m) &&
260          !owl_message_is_mail(m) &&
261          owl_message_is_personal(m)) {
262        owl_function_beep();
263      }
264    } else if (!strcmp(owl_global_get_personalbell(&g), "off")) {
265      /* do nothing */
266    } else {
267      f=owl_global_get_filter(&g, owl_global_get_personalbell(&g));
268      if (f && owl_filter_message_match(f, m)) {
269        owl_function_beep();
270      }
271    }
272
273    /* if it matches the alert filter, do the alert action */
274    f=owl_global_get_filter(&g, owl_global_get_alert_filter(&g));
275    if (f && owl_filter_message_match(f, m)) {
276      owl_function_command(owl_global_get_alert_action(&g));
277    }
278
279    /* if it's a zephyr login or logout, update the zbuddylist */
280    if (owl_message_is_type_zephyr(m) && owl_message_is_loginout(m)) {
281      if (owl_message_is_login(m)) {
282        owl_zbuddylist_adduser(owl_global_get_zephyr_buddylist(&g), owl_message_get_sender(m));
283      } else if (owl_message_is_logout(m)) {
284        owl_zbuddylist_deluser(owl_global_get_zephyr_buddylist(&g), owl_message_get_sender(m));
285      } else {
286        owl_function_error("Internal error: received login notice that is neither login nor logout");
287      }
288    }
289  }
290
291  /* let perl know about it */
292  owl_perlconfig_newmsg(m, NULL);
293  /* log the message if we need to */
294  owl_log_message(m);
295
296  return 1;
297}
298
299void owl_process_input(owl_dispatch *d)
300{
301  owl_input j;
302  WINDOW *typwin;
303
304  typwin = owl_global_get_curs_typwin(&g);
305
306  while (1) {
307    j.ch = wgetch(typwin);
308    if (j.ch == ERR) return;
309
310    j.uch = '\0';
311    if (j.ch >= KEY_MIN && j.ch <= KEY_MAX) {
312      /* This is a curses control character. */
313    }
314    else if (j.ch > 0x7f && j.ch < 0xfe) {
315      /* Pull in a full utf-8 character. */
316      int bytes, i;
317      char utf8buf[7];
318      memset(utf8buf, '\0', 7);
319     
320      utf8buf[0] = j.ch;
321     
322      if ((j.ch & 0xc0) && (~j.ch & 0x20)) bytes = 2;
323      else if ((j.ch & 0xe0) && (~j.ch & 0x10)) bytes = 3;
324      else if ((j.ch & 0xf0) && (~j.ch & 0x08)) bytes = 4;
325      else if ((j.ch & 0xf8) && (~j.ch & 0x04)) bytes = 5;
326      else if ((j.ch & 0xfc) && (~j.ch & 0x02)) bytes = 6;
327      else bytes = 1;
328     
329      for (i = 1; i < bytes; i++) {
330        int tmp =  wgetch(typwin);
331        /* If what we got was not a byte, or not a continuation byte */
332        if (tmp > 0xff || !(tmp & 0x80 && ~tmp & 0x40)) {
333          /* ill-formed UTF-8 code unit subsequence, put back the
334             char we just got. */
335          ungetch(tmp);
336          j.ch = ERR;
337          break;
338        }
339        utf8buf[i] = tmp;
340      }
341     
342      if (j.ch != ERR) {
343        if (g_utf8_validate(utf8buf, -1, NULL)) {
344          j.uch = g_utf8_get_char(utf8buf);
345        }
346        else {
347          j.ch = ERR;
348        }
349      }
350    }
351    else if (j.ch <= 0x7f) {
352      j.uch = j.ch;
353    }
354
355    owl_process_input_char(j);
356  }
357}
358
359void sig_handler(int sig, siginfo_t *si, void *data)
360{
361  if (sig==SIGWINCH) {
362    /* we can't inturrupt a malloc here, so it just sets a flag
363     * schedulding a resize for later
364     */
365    owl_function_resize();
366  } else if (sig==SIGPIPE || sig==SIGCHLD) {
367    /* Set a flag and some info that we got the sigpipe
368     * so we can record that we got it and why... */
369    owl_global_set_errsignal(&g, sig, si);
370  } else if (sig==SIGTERM || sig==SIGHUP) {
371    owl_function_quit();
372  }
373}
374
375void sigint_handler(int sig, siginfo_t *si, void *data)
376{
377  owl_global_set_interrupted(&g);
378}
379
380void owl_register_signal_handlers(void) {
381  struct sigaction sigact;
382
383  /* signal handler */
384  /*sigact.sa_handler=sig_handler;*/
385  sigact.sa_sigaction=sig_handler;
386  sigemptyset(&sigact.sa_mask);
387  sigact.sa_flags=SA_SIGINFO;
388  sigaction(SIGWINCH, &sigact, NULL);
389  sigaction(SIGALRM, &sigact, NULL);
390  sigaction(SIGPIPE, &sigact, NULL);
391  sigaction(SIGTERM, &sigact, NULL);
392  sigaction(SIGHUP, &sigact, NULL);
393
394  sigact.sa_sigaction=sigint_handler;
395  sigaction(SIGINT, &sigact, NULL);
396
397}
398
399#if OWL_STDERR_REDIR
400
401/* Replaces stderr with a pipe so that we can read from it.
402 * Returns the fd of the pipe from which stderr can be read. */
403int stderr_replace(void)
404{
405  int pipefds[2];
406  if (0 != pipe(pipefds)) {
407    perror("pipe");
408    owl_function_debugmsg("stderr_replace: pipe FAILED\n");
409    return -1;
410  }
411    owl_function_debugmsg("stderr_replace: pipe: %d,%d\n", pipefds[0], pipefds[1]);
412  if (-1 == dup2(pipefds[1], 2 /*stderr*/)) {
413    owl_function_debugmsg("stderr_replace: dup2 FAILED (%s)\n", strerror(errno));
414    perror("dup2");
415    return -1;
416  }
417  return pipefds[0];
418}
419
420/* Sends stderr (read from rfd) messages to the error console */
421void stderr_redirect_handler(owl_dispatch *d)
422{
423  int navail, bread;
424  char buf[4096];
425  int rfd = d->fd;
426  char *err;
427
428  if (rfd<0) return;
429  if (-1 == ioctl(rfd, FIONREAD, &navail)) {
430    return;
431  }
432  /*owl_function_debugmsg("stderr_redirect: navail = %d\n", navail);*/
433  if (navail <= 0) return;
434  if (navail > sizeof(buf)-1) {
435    navail = sizeof(buf)-1;
436  }
437  bread = read(rfd, buf, navail);
438  if (buf[navail-1] != '\0') {
439    buf[navail] = '\0';
440  }
441
442  err = owl_sprintf("[stderr]\n%s", buf);
443
444  owl_function_log_err(err);
445  owl_free(err);
446}
447
448#endif /* OWL_STDERR_REDIR */
449
450void owl_zephyr_buddycheck_timer(owl_timer *t, void *data)
451{
452  if (owl_global_is_pseudologins(&g)) {
453    owl_function_debugmsg("Doing zephyr buddy check");
454    owl_function_zephyr_buddy_check(1);
455  }
456}
457
458
459int main(int argc, char **argv, char **env)
460{
461  WINDOW *recwin, *sepwin, *typwin, *msgwin;
462  owl_editwin *tw;
463  owl_popwin *pw;
464  int argcsave, followlast;
465  int newmsgs, nexttimediff;
466  const char *const *argvsave;
467  char *perlout, *perlerr;
468  const owl_style *s;
469  time_t nexttime, now;
470  struct tm *today;
471  const char *dir;
472  owl_message *m;
473  owl_options opts;
474
475  if (!GLIB_CHECK_VERSION (2, 12, 0))
476    g_error ("GLib version 2.12.0 or above is needed.");
477
478  argcsave=argc;
479  argvsave=strs(argv);
480
481  setlocale(LC_ALL, "");
482
483  memset(&opts, 0, sizeof opts);
484  opts.load_initial_subs = 1;
485  owl_parse_options(argc, argv, &opts);
486  g.load_initial_subs = opts.load_initial_subs;
487
488  owl_function_debugmsg("startup: Finished parsing arguments");
489
490  owl_register_signal_handlers();
491  owl_start_curses();
492
493  /* owl global init */
494  owl_global_init(&g);
495  if (opts.rm_debug) unlink(OWL_DEBUG_FILE);
496  if (opts.debug) owl_global_set_debug_on(&g);
497  if (opts.confdir) owl_global_set_confdir(&g, opts.confdir);
498  owl_function_debugmsg("startup: first available debugging message");
499  owl_global_set_startupargs(&g, argcsave, argvsave);
500  owl_global_set_haveaim(&g);
501
502  /* prepare stdin dispatch */
503  {
504    owl_dispatch *d = owl_malloc(sizeof(owl_dispatch));
505    d->fd = STDIN;
506    d->cfunc = &owl_process_input;
507    d->destroy = NULL;
508    owl_select_add_dispatch(d);
509  }
510
511  owl_zephyr_initialize();
512
513#if OWL_STDERR_REDIR
514  /* Do this only after we've started curses up... */
515  {
516    owl_dispatch *d = owl_malloc(sizeof(owl_dispatch));
517    owl_function_debugmsg("startup: doing stderr redirection");
518    d->fd = stderr_replace();
519    d->cfunc = stderr_redirect_handler;
520    d->destroy = NULL;
521    owl_select_add_dispatch(d);
522  }
523#endif
524
525  /* create the owl directory, in case it does not exist */
526  owl_function_debugmsg("startup: creating owl directory, if not present");
527  dir=owl_global_get_confdir(&g);
528  mkdir(dir, S_IRWXU);
529
530  /* set the tty, either from the command line, or by figuring it out */
531  owl_function_debugmsg("startup: setting tty name");
532  if (opts.tty) {
533    owl_global_set_tty(&g, opts.tty);
534  } else {
535    owl_global_set_tty(&g, owl_util_get_default_tty());
536  }
537
538  /* Initialize perl */
539  owl_function_debugmsg("startup: processing config file");
540  owl_context_set_readconfig(owl_global_get_context(&g));
541  perlerr=owl_perlconfig_initperl(opts.configfile, &argc, &argv, &env);
542  if (perlerr) {
543    endwin();
544    fprintf(stderr, "Internal perl error: %s\n", perlerr);
545    fflush(stderr);
546    printf("Internal perl error: %s\n", perlerr);
547    fflush(stdout);
548    exit(1);
549  }
550
551  owl_global_complete_setup(&g);
552
553  owl_setup_default_filters();
554
555  /* set the current view */
556  owl_function_debugmsg("startup: setting the current view");
557  owl_view_create(owl_global_get_current_view(&g), "main",
558                  owl_global_get_filter(&g, "all"),
559                  owl_global_get_style_by_name(&g, "default"));
560
561  /* AIM init */
562  owl_function_debugmsg("startup: doing AIM initialization");
563  owl_aim_init();
564
565  /* execute the startup function in the configfile */
566  owl_function_debugmsg("startup: executing perl startup, if applicable");
567  perlout = owl_perlconfig_execute("BarnOwl::Hooks::_startup();");
568  if (perlout) owl_free(perlout);
569
570  /* hold on to the window names for convenience */
571  msgwin=owl_global_get_curs_msgwin(&g);
572  recwin=owl_global_get_curs_recwin(&g);
573  sepwin=owl_global_get_curs_sepwin(&g);
574  typwin=owl_global_get_curs_typwin(&g);
575  tw=owl_global_get_typwin(&g);
576
577  /* welcome message */
578  owl_function_debugmsg("startup: creating splash message");
579  owl_function_adminmsg("",
580    "-----------------------------------------------------------------------\n"
581    "Welcome to barnowl version " OWL_VERSION_STRING ".  Press 'h' for on-line help.\n"
582    "To see a quick introduction, type ':show quickstart'.                  \n"
583    "                                                                       \n"
584    "BarnOwl is free software. Type ':show license' for more                \n"
585    "information.                                                     ^ ^   \n"
586    "                                                                 OvO   \n"
587    "Please report any bugs or suggestions to bug-barnowl@mit.edu    (   )  \n"
588    "-----------------------------------------------------------------m-m---\n"
589  );
590  sepbar(NULL);
591
592  /* process the startup file */
593  owl_function_debugmsg("startup: processing startup file");
594  owl_function_source(NULL);
595
596  wrefresh(sepwin);
597
598  /* Set the default style */
599  owl_function_debugmsg("startup: setting startup and default style");
600  if (0 != strcmp(owl_global_get_default_style(&g), "__unspecified__")) {
601    /* the style was set by the user: leave it alone */
602  } else {
603    owl_global_set_default_style(&g, "default");
604  }
605
606  owl_function_debugmsg("startup: set style for the view: %s", owl_global_get_default_style(&g));
607  s = owl_global_get_style_by_name(&g, owl_global_get_default_style(&g));
608  if(s)
609      owl_view_set_style(owl_global_get_current_view(&g), s);
610  else
611      owl_function_error("No such style: %s", owl_global_get_default_style(&g));
612
613  owl_function_debugmsg("startup: setting context interactive");
614  owl_context_set_interactive(owl_global_get_context(&g));
615
616  nexttimediff=10;
617  nexttime=time(NULL);
618
619  owl_select_add_timer(180, 180, owl_zephyr_buddycheck_timer, NULL, NULL);
620
621  /* If we ever deprecate the mainloop hook, remove this. */
622  owl_select_add_timer(0, 1, owl_perlconfig_mainloop, NULL, NULL);
623
624  owl_function_debugmsg("startup: entering main loop");
625  /* main loop */
626  while (1) {
627
628    /* if a resize has been scheduled, deal with it */
629    owl_global_resize(&g, 0, 0);
630
631    /* these are here in case a resize changes the windows */
632    msgwin=owl_global_get_curs_msgwin(&g);
633    recwin=owl_global_get_curs_recwin(&g);
634    sepwin=owl_global_get_curs_sepwin(&g);
635    typwin=owl_global_get_curs_typwin(&g);
636
637    followlast=owl_global_should_followlast(&g);
638
639    /* little hack */
640    now=time(NULL);
641    today=localtime(&now);
642    if (today->tm_mon==9 && today->tm_mday==31 && owl_global_get_runtime(&g)<600) {
643      if (time(NULL)>nexttime) {
644        if (nexttimediff==1) {
645          nexttimediff=10;
646        } else {
647          nexttimediff=1;
648        }
649        nexttime+=nexttimediff;
650        owl_hack_animate();
651      }
652    }
653
654    /* Grab incoming messages. */
655    newmsgs=0;
656    while(owl_global_messagequeue_pending(&g)) {
657
658      m = owl_global_messagequeue_popmsg(&g);
659
660      if(owl_process_message(m))
661        newmsgs = 1;
662    }
663
664    /* follow the last message if we're supposed to */
665    if (newmsgs && followlast) {
666      owl_function_lastmsg_noredisplay();
667    }
668
669    /* do the newmsgproc thing */
670    if (newmsgs) {
671      owl_function_do_newmsgproc();
672    }
673   
674    /* redisplay if necessary */
675    /* this should be optimized to not run if the new messages won't be displayed */
676    if (newmsgs) {
677      owl_mainwin_redisplay(owl_global_get_mainwin(&g));
678      sepbar(NULL);
679      if (owl_popwin_is_active(owl_global_get_popwin(&g))) {
680        owl_popwin_refresh(owl_global_get_popwin(&g));
681        /* TODO: this is a broken kludge */
682        if (owl_global_get_viewwin(&g)) {
683          owl_viewwin_redisplay(owl_global_get_viewwin(&g), 0);
684        }
685      }
686      owl_global_set_needrefresh(&g);
687    }
688
689    /* if a popwin just came up, refresh it */
690    pw=owl_global_get_popwin(&g);
691    if (owl_popwin_is_active(pw) && owl_popwin_needs_first_refresh(pw)) {
692      owl_popwin_refresh(pw);
693      owl_popwin_no_needs_first_refresh(pw);
694      owl_global_set_needrefresh(&g);
695      /* TODO: this is a broken kludge */
696      if (owl_global_get_viewwin(&g)) {
697        owl_viewwin_redisplay(owl_global_get_viewwin(&g), 0);
698      }
699    }
700
701    /* update the terminal if we need to */
702    if (owl_global_is_needrefresh(&g)) {
703      /* leave the cursor in the appropriate window */
704      if (owl_global_is_typwin_active(&g)) {
705        owl_function_set_cursor(typwin);
706      } else {
707        owl_function_set_cursor(sepwin);
708      }
709      doupdate();
710      owl_global_set_noneedrefresh(&g);
711    }
712
713    /* Some calls into libzephyr call Z_WaitForNotice(), which has its
714     * own select loop and may leave zephyrs on the queue. Check for
715     * them now, and process any we find. */
716    owl_zephyr_process_events(NULL);
717
718    /* select on FDs we know about. */
719    owl_select();
720
721    /* Log any error signals */
722    {
723      siginfo_t si;
724      int signum;
725      if ((signum = owl_global_get_errsignal_and_clear(&g, &si)) > 0) {
726        owl_function_error("Got unexpected signal: %d %s  (code: %d band: %ld  errno: %d)",
727                           signum, signum==SIGPIPE?"SIGPIPE":"SIG????",
728                           si.si_code, si.si_band, si.si_errno);
729      }
730    }
731
732  }
733}
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