source: owl.c @ 52761cc

release-1.5release-1.6release-1.7release-1.8release-1.9
Last change on this file since 52761cc was 84ea53c, checked in by Karl Ramm <kcr@1ts.org>, 12 years ago
data-driven owl_setup_default_filter Factor out a bunch of calls to the same three subroutines into an array, a loop, and one set of calls.
  • Property mode set to 100644
File size: 20.2 KB
Line 
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(void)
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
151static void owl_setup_default_filters(void)
152{
153  owl_filter *f;
154  int i;
155  static const struct {
156    const char *name;
157    const char *desc;
158  } filters[] = {
159    { "personal",
160      "isprivate ^true$ and ( not type ^zephyr$ or ( class ^message  ) )" },
161    { "trash",
162      "class ^mail$ or opcode ^ping$ or type ^admin$ or ( not login ^none$ )" },
163    { "wordwrap", "not ( type ^admin$ or type ^zephyr$ )" },
164    { "ping", "opcode ^ping$" },
165    { "auto", "opcode ^auto$" },
166    { "login", "not login ^none$" },
167    { "reply-lockout", "class ^noc or class ^mail$" },
168    { "out", "direction ^out$" },
169    { "aim", "type ^aim$" },
170    { "zephyr", "type ^zephyr$" },
171    { "none", "false" },
172    { "all", "true" },
173    { NULL, NULL }
174  };
175
176  owl_function_debugmsg("startup: creating default filters");
177
178  for (i = 0; filters[i].name != NULL; i++) {
179    f = owl_malloc(sizeof(owl_filter));
180    owl_filter_init_fromstring(f, filters[i].name, filters[i].desc);
181    owl_list_append_element(owl_global_get_filterlist(&g), f);
182  }
183}
184
185/*
186 * Process a new message passed to us on the message queue from some
187 * protocol. This includes adding it to the message list, updating the
188 * view and scrolling if appropriate, logging it, and so on.
189 *
190 * Either a pointer is kept to the message internally, or it is freed
191 * if unneeded. The caller no longer ``owns'' the message's memory.
192 *
193 * Returns 1 if the message was added to the message list, and 0 if it
194 * was ignored due to user settings or otherwise.
195 */
196int owl_process_message(owl_message *m) {
197  const owl_filter *f;
198  /* if this message it on the puntlist, nuke it and continue */
199  if (owl_global_message_is_puntable(&g, m)) {
200    owl_message_free(m);
201    return 0;
202  }
203
204  /*  login or logout that should be ignored? */
205  if (owl_global_is_ignorelogins(&g)
206      && owl_message_is_loginout(m)) {
207    owl_message_free(m);
208    return 0;
209  }
210
211  if (!owl_global_is_displayoutgoing(&g)
212      && owl_message_is_direction_out(m)) {
213    owl_message_free(m);
214    return 0;
215  }
216
217  /* add it to the global list */
218  owl_messagelist_append_element(owl_global_get_msglist(&g), m);
219  /* add it to any necessary views; right now there's only the current view */
220  owl_view_consider_message(owl_global_get_current_view(&g), m);
221
222  if(owl_message_is_direction_in(m)) {
223    /* let perl know about it*/
224    owl_perlconfig_getmsg(m, NULL);
225
226    /* do we need to autoreply? */
227    if (owl_global_is_zaway(&g) && !owl_message_get_attribute_value(m, "isauto")) {
228      if (owl_message_is_type_zephyr(m)) {
229        owl_zephyr_zaway(m);
230      } else if (owl_message_is_type_aim(m)) {
231        if (owl_message_is_private(m)) {
232          owl_function_send_aimawymsg(owl_message_get_sender(m), owl_global_get_zaway_msg(&g));
233        }
234      }
235    }
236
237    /* ring the bell if it's a personal */
238    if (!strcmp(owl_global_get_personalbell(&g), "on")) {
239      if (!owl_message_is_loginout(m) &&
240          !owl_message_is_mail(m) &&
241          owl_message_is_personal(m)) {
242        owl_function_beep();
243      }
244    } else if (!strcmp(owl_global_get_personalbell(&g), "off")) {
245      /* do nothing */
246    } else {
247      f=owl_global_get_filter(&g, owl_global_get_personalbell(&g));
248      if (f && owl_filter_message_match(f, m)) {
249        owl_function_beep();
250      }
251    }
252
253    /* if it matches the alert filter, do the alert action */
254    f=owl_global_get_filter(&g, owl_global_get_alert_filter(&g));
255    if (f && owl_filter_message_match(f, m)) {
256      owl_function_command(owl_global_get_alert_action(&g));
257    }
258
259    /* if it's a zephyr login or logout, update the zbuddylist */
260    if (owl_message_is_type_zephyr(m) && owl_message_is_loginout(m)) {
261      if (owl_message_is_login(m)) {
262        owl_zbuddylist_adduser(owl_global_get_zephyr_buddylist(&g), owl_message_get_sender(m));
263      } else if (owl_message_is_logout(m)) {
264        owl_zbuddylist_deluser(owl_global_get_zephyr_buddylist(&g), owl_message_get_sender(m));
265      } else {
266        owl_function_error("Internal error: received login notice that is neither login nor logout");
267      }
268    }
269  }
270
271  /* let perl know about it */
272  owl_perlconfig_newmsg(m, NULL);
273  /* log the message if we need to */
274  owl_log_message(m);
275
276  return 1;
277}
278
279/*
280 * Process any new messages we have waiting in the message queue.
281 * Returns 1 if any messages were added to the message list, and 0 otherwise.
282 */
283int owl_process_messages(owl_ps_action *d, void *p)
284{
285  int newmsgs=0;
286  owl_message *m;
287
288  /* Grab incoming messages. */
289  while (owl_global_messagequeue_pending(&g)) {
290    m = owl_global_messagequeue_popmsg(&g);
291    if (owl_process_message(m))
292      newmsgs = 1;
293  }
294
295  if (newmsgs) {
296    /* follow the last message if we're supposed to */
297    if (owl_global_should_followlast(&g))
298      owl_function_lastmsg_noredisplay();
299
300    /* do the newmsgproc thing */
301    owl_function_do_newmsgproc();
302
303    /* redisplay if necessary */
304    /* this should be optimized to not run if the new messages won't be displayed */
305    owl_mainwin_redisplay(owl_global_get_mainwin(&g));
306    sepbar(NULL);
307    if (owl_popwin_is_active(owl_global_get_popwin(&g))) {
308      owl_popwin_refresh(owl_global_get_popwin(&g));
309      /* TODO: this is a broken kludge */
310      if (owl_global_get_viewwin(&g)) {
311        owl_viewwin_redisplay(owl_global_get_viewwin(&g), 0);
312      }
313    }
314    owl_global_set_needrefresh(&g);
315  }
316  return newmsgs;
317}
318
319void owl_process_input(owl_dispatch *d)
320{
321  owl_input j;
322  WINDOW *typwin;
323
324  typwin = owl_global_get_curs_typwin(&g);
325
326  while (1) {
327    j.ch = wgetch(typwin);
328    if (j.ch == ERR) return;
329
330    j.uch = '\0';
331    if (j.ch >= KEY_MIN && j.ch <= KEY_MAX) {
332      /* This is a curses control character. */
333    }
334    else if (j.ch > 0x7f && j.ch < 0xfe) {
335      /* Pull in a full utf-8 character. */
336      int bytes, i;
337      char utf8buf[7];
338      memset(utf8buf, '\0', 7);
339     
340      utf8buf[0] = j.ch;
341     
342      if ((j.ch & 0xc0) && (~j.ch & 0x20)) bytes = 2;
343      else if ((j.ch & 0xe0) && (~j.ch & 0x10)) bytes = 3;
344      else if ((j.ch & 0xf0) && (~j.ch & 0x08)) bytes = 4;
345      else if ((j.ch & 0xf8) && (~j.ch & 0x04)) bytes = 5;
346      else if ((j.ch & 0xfc) && (~j.ch & 0x02)) bytes = 6;
347      else bytes = 1;
348     
349      for (i = 1; i < bytes; i++) {
350        int tmp =  wgetch(typwin);
351        /* If what we got was not a byte, or not a continuation byte */
352        if (tmp > 0xff || !(tmp & 0x80 && ~tmp & 0x40)) {
353          /* ill-formed UTF-8 code unit subsequence, put back the
354             char we just got. */
355          ungetch(tmp);
356          j.ch = ERR;
357          break;
358        }
359        utf8buf[i] = tmp;
360      }
361     
362      if (j.ch != ERR) {
363        if (g_utf8_validate(utf8buf, -1, NULL)) {
364          j.uch = g_utf8_get_char(utf8buf);
365        }
366        else {
367          j.ch = ERR;
368        }
369      }
370    }
371    else if (j.ch <= 0x7f) {
372      j.uch = j.ch;
373    }
374
375    owl_process_input_char(j);
376  }
377}
378
379void sig_handler(int sig, siginfo_t *si, void *data)
380{
381  if (sig==SIGWINCH) {
382    /* we can't inturrupt a malloc here, so it just sets a flag
383     * schedulding a resize for later
384     */
385    owl_function_resize();
386  } else if (sig==SIGPIPE || sig==SIGCHLD) {
387    /* Set a flag and some info that we got the sigpipe
388     * so we can record that we got it and why... */
389    owl_global_set_errsignal(&g, sig, si);
390  } else if (sig==SIGTERM || sig==SIGHUP) {
391    owl_function_quit();
392  }
393}
394
395void sigint_handler(int sig, siginfo_t *si, void *data)
396{
397  owl_global_set_interrupted(&g);
398}
399
400void sigtstp_handler(int sig, siginfo_t *si, void *data)
401{
402  owl_global_set_got_sigstp(&g);
403}
404
405void owl_register_signal_handlers(void) {
406  struct sigaction sigact;
407
408  /* signal handler */
409  /*sigact.sa_handler=sig_handler;*/
410  sigact.sa_sigaction=sig_handler;
411  sigemptyset(&sigact.sa_mask);
412  sigact.sa_flags=SA_SIGINFO;
413  sigaction(SIGWINCH, &sigact, NULL);
414  sigaction(SIGALRM, &sigact, NULL);
415  sigaction(SIGPIPE, &sigact, NULL);
416  sigaction(SIGTERM, &sigact, NULL);
417  sigaction(SIGHUP, &sigact, NULL);
418
419  sigact.sa_sigaction=sigint_handler;
420  sigaction(SIGINT, &sigact, NULL);
421
422  sigact.sa_sigaction=sigtstp_handler;
423  sigaction(SIGTSTP, &sigact, NULL);
424}
425
426#if OWL_STDERR_REDIR
427
428/* Replaces stderr with a pipe so that we can read from it.
429 * Returns the fd of the pipe from which stderr can be read. */
430int stderr_replace(void)
431{
432  int pipefds[2];
433  if (0 != pipe(pipefds)) {
434    perror("pipe");
435    owl_function_debugmsg("stderr_replace: pipe FAILED\n");
436    return -1;
437  }
438    owl_function_debugmsg("stderr_replace: pipe: %d,%d\n", pipefds[0], pipefds[1]);
439  if (-1 == dup2(pipefds[1], 2 /*stderr*/)) {
440    owl_function_debugmsg("stderr_replace: dup2 FAILED (%s)\n", strerror(errno));
441    perror("dup2");
442    return -1;
443  }
444  return pipefds[0];
445}
446
447/* Sends stderr (read from rfd) messages to the error console */
448void stderr_redirect_handler(owl_dispatch *d)
449{
450  int navail, bread;
451  char buf[4096];
452  int rfd = d->fd;
453  char *err;
454
455  if (rfd<0) return;
456  if (-1 == ioctl(rfd, FIONREAD, &navail)) {
457    return;
458  }
459  /*owl_function_debugmsg("stderr_redirect: navail = %d\n", navail);*/
460  if (navail <= 0) return;
461  if (navail > sizeof(buf)-1) {
462    navail = sizeof(buf)-1;
463  }
464  bread = read(rfd, buf, navail);
465  if (buf[navail-1] != '\0') {
466    buf[navail] = '\0';
467  }
468
469  err = owl_sprintf("[stderr]\n%s", buf);
470
471  owl_function_log_err(err);
472  owl_free(err);
473}
474
475#endif /* OWL_STDERR_REDIR */
476
477void owl_zephyr_buddycheck_timer(owl_timer *t, void *data)
478{
479  if (owl_global_is_pseudologins(&g)) {
480    owl_function_debugmsg("Doing zephyr buddy check");
481    owl_function_zephyr_buddy_check(1);
482  }
483}
484
485
486int main(int argc, char **argv, char **env)
487{
488  WINDOW *recwin, *sepwin, *typwin, *msgwin;
489  owl_editwin *tw;
490  owl_popwin *pw;
491  int argcsave;
492  const char *const *argvsave;
493  char *perlout, *perlerr;
494  const owl_style *s;
495  const char *dir;
496  owl_options opts;
497
498  if (!GLIB_CHECK_VERSION (2, 12, 0))
499    g_error ("GLib version 2.12.0 or above is needed.");
500
501  argcsave=argc;
502  argvsave=strs(argv);
503
504  setlocale(LC_ALL, "");
505
506  memset(&opts, 0, sizeof opts);
507  opts.load_initial_subs = 1;
508  owl_parse_options(argc, argv, &opts);
509  g.load_initial_subs = opts.load_initial_subs;
510
511  owl_function_debugmsg("startup: Finished parsing arguments");
512
513  owl_register_signal_handlers();
514  owl_start_curses();
515
516  /* owl global init */
517  owl_global_init(&g);
518  if (opts.rm_debug) unlink(OWL_DEBUG_FILE);
519  if (opts.debug) owl_global_set_debug_on(&g);
520  if (opts.confdir) owl_global_set_confdir(&g, opts.confdir);
521  owl_function_debugmsg("startup: first available debugging message");
522  owl_global_set_startupargs(&g, argcsave, argvsave);
523  owl_global_set_haveaim(&g);
524
525  /* prepare stdin dispatch */
526  {
527    owl_dispatch *d = owl_malloc(sizeof(owl_dispatch));
528    d->fd = STDIN;
529    d->cfunc = &owl_process_input;
530    d->destroy = NULL;
531    owl_select_add_dispatch(d);
532  }
533
534  owl_zephyr_initialize();
535
536#if OWL_STDERR_REDIR
537  /* Do this only after we've started curses up... */
538  {
539    owl_dispatch *d = owl_malloc(sizeof(owl_dispatch));
540    owl_function_debugmsg("startup: doing stderr redirection");
541    d->fd = stderr_replace();
542    d->cfunc = stderr_redirect_handler;
543    d->destroy = NULL;
544    owl_select_add_dispatch(d);
545  }
546#endif
547
548  /* create the owl directory, in case it does not exist */
549  owl_function_debugmsg("startup: creating owl directory, if not present");
550  dir=owl_global_get_confdir(&g);
551  mkdir(dir, S_IRWXU);
552
553  /* set the tty, either from the command line, or by figuring it out */
554  owl_function_debugmsg("startup: setting tty name");
555  if (opts.tty) {
556    owl_global_set_tty(&g, opts.tty);
557  } else {
558    owl_global_set_tty(&g, owl_util_get_default_tty());
559  }
560
561  /* Initialize perl */
562  owl_function_debugmsg("startup: processing config file");
563  owl_context_set_readconfig(owl_global_get_context(&g));
564  perlerr=owl_perlconfig_initperl(opts.configfile, &argc, &argv, &env);
565  if (perlerr) {
566    endwin();
567    fprintf(stderr, "Internal perl error: %s\n", perlerr);
568    fflush(stderr);
569    printf("Internal perl error: %s\n", perlerr);
570    fflush(stdout);
571    exit(1);
572  }
573
574  owl_global_complete_setup(&g);
575
576  owl_setup_default_filters();
577
578  /* set the current view */
579  owl_function_debugmsg("startup: setting the current view");
580  owl_view_create(owl_global_get_current_view(&g), "main",
581                  owl_global_get_filter(&g, "all"),
582                  owl_global_get_style_by_name(&g, "default"));
583
584  /* AIM init */
585  owl_function_debugmsg("startup: doing AIM initialization");
586  owl_aim_init();
587
588  /* execute the startup function in the configfile */
589  owl_function_debugmsg("startup: executing perl startup, if applicable");
590  perlout = owl_perlconfig_execute("BarnOwl::Hooks::_startup();");
591  if (perlout) owl_free(perlout);
592
593  /* hold on to the window names for convenience */
594  msgwin=owl_global_get_curs_msgwin(&g);
595  recwin=owl_global_get_curs_recwin(&g);
596  sepwin=owl_global_get_curs_sepwin(&g);
597  typwin=owl_global_get_curs_typwin(&g);
598  tw=owl_global_get_typwin(&g);
599
600  /* welcome message */
601  owl_function_debugmsg("startup: creating splash message");
602  owl_function_adminmsg("",
603    "-----------------------------------------------------------------------\n"
604    "Welcome to barnowl version " OWL_VERSION_STRING ".  Press 'h' for on-line help.\n"
605    "To see a quick introduction, type ':show quickstart'.                  \n"
606    "                                                                       \n"
607    "BarnOwl is free software. Type ':show license' for more                \n"
608    "information.                                                     ^ ^   \n"
609    "                                                                 OvO   \n"
610    "Please report any bugs or suggestions to bug-barnowl@mit.edu    (   )  \n"
611    "-----------------------------------------------------------------m-m---\n"
612  );
613  sepbar(NULL);
614
615  /* process the startup file */
616  owl_function_debugmsg("startup: processing startup file");
617  owl_function_source(NULL);
618
619  wrefresh(sepwin);
620
621  /* Set the default style */
622  owl_function_debugmsg("startup: setting startup and default style");
623  if (0 != strcmp(owl_global_get_default_style(&g), "__unspecified__")) {
624    /* the style was set by the user: leave it alone */
625  } else {
626    owl_global_set_default_style(&g, "default");
627  }
628
629  owl_function_debugmsg("startup: set style for the view: %s", owl_global_get_default_style(&g));
630  s = owl_global_get_style_by_name(&g, owl_global_get_default_style(&g));
631  if(s)
632      owl_view_set_style(owl_global_get_current_view(&g), s);
633  else
634      owl_function_error("No such style: %s", owl_global_get_default_style(&g));
635
636  owl_function_debugmsg("startup: setting context interactive");
637  owl_context_set_interactive(owl_global_get_context(&g));
638
639  owl_select_add_timer(180, 180, owl_zephyr_buddycheck_timer, NULL, NULL);
640
641  /* If we ever deprecate the mainloop hook, remove this. */
642  owl_select_add_timer(0, 1, owl_perlconfig_mainloop, NULL, NULL);
643
644  owl_select_add_pre_select_action(owl_process_messages, NULL, NULL);
645
646  owl_function_debugmsg("startup: entering main loop");
647  /* main loop */
648  while (1) {
649
650    /* if a resize has been scheduled, deal with it */
651    owl_global_resize(&g, 0, 0);
652
653    /* these are here in case a resize changes the windows */
654    msgwin=owl_global_get_curs_msgwin(&g);
655    recwin=owl_global_get_curs_recwin(&g);
656    sepwin=owl_global_get_curs_sepwin(&g);
657    typwin=owl_global_get_curs_typwin(&g);
658
659    /* if a popwin just came up, refresh it */
660    pw=owl_global_get_popwin(&g);
661    if (owl_popwin_is_active(pw) && owl_popwin_needs_first_refresh(pw)) {
662      owl_popwin_refresh(pw);
663      owl_popwin_no_needs_first_refresh(pw);
664      owl_global_set_needrefresh(&g);
665      /* TODO: this is a broken kludge */
666      if (owl_global_get_viewwin(&g)) {
667        owl_viewwin_redisplay(owl_global_get_viewwin(&g), 0);
668      }
669    }
670
671    /* update the terminal if we need to */
672    if (owl_global_is_needrefresh(&g)) {
673      /* leave the cursor in the appropriate window */
674      if (owl_global_is_typwin_active(&g)) {
675        owl_function_set_cursor(typwin);
676      } else {
677        owl_function_set_cursor(sepwin);
678      }
679      doupdate();
680      owl_global_set_noneedrefresh(&g);
681    }
682
683    /* select on FDs we know about. */
684    owl_select();
685
686    /* Log any error signals */
687    {
688      siginfo_t si;
689      int signum;
690      if ((signum = owl_global_get_errsignal_and_clear(&g, &si)) > 0) {
691        owl_function_error("Got unexpected signal: %d %s  (code: %d band: %ld  errno: %d)",
692                           signum, signum==SIGPIPE?"SIGPIPE":"SIG????",
693                           si.si_code, si.si_band, si.si_errno);
694      }
695    }
696
697  }
698}
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