source: owl.c @ cd12307

release-1.5release-1.6release-1.7release-1.8release-1.9
Last change on this file since cd12307 was 129e609, checked in by Nelson Elhage <nelhage@mit.edu>, 12 years ago
Use a owl_dict to store the list of filters. Cathy Zhang reported that narrowing to filters that reference other filters is significantly slower than narrowing to filters that don't. The culprit is almost certainly the linear lookup of filters by name, which we currently do on each filter evaluation. Switch to using an owl_dict, which will now do a binary search over the filter list. We could potentially get this even faster by caching the owl_filter itself inside the owl_filterelement, and invalidating it somehow on filter redefinition, but we can save that sort of cleverness for later, if necessary. We also store the filters in a linked list, in order to preserve the ability to traverse them in order, for ":show filters" and for coloring.
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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(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  int i;
154  static const struct {
155    const char *name;
156    const char *desc;
157  } filters[] = {
158    { "personal",
159      "isprivate ^true$ and ( not type ^zephyr$ or ( class ^message  ) )" },
160    { "trash",
161      "class ^mail$ or opcode ^ping$ or type ^admin$ or ( not login ^none$ )" },
162    { "wordwrap", "not ( type ^admin$ or type ^zephyr$ )" },
163    { "ping", "opcode ^ping$" },
164    { "auto", "opcode ^auto$" },
165    { "login", "not login ^none$" },
166    { "reply-lockout", "class ^noc or class ^mail$" },
167    { "out", "direction ^out$" },
168    { "aim", "type ^aim$" },
169    { "zephyr", "type ^zephyr$" },
170    { "none", "false" },
171    { "all", "true" },
172    { NULL, NULL }
173  };
174
175  owl_function_debugmsg("startup: creating default filters");
176
177  for (i = 0; filters[i].name != NULL; i++)
178    owl_global_add_filter(&g, owl_filter_new_fromstring(filters[i].name,
179                                                        filters[i].desc));
180}
181
182/*
183 * Process a new message passed to us on the message queue from some
184 * protocol. This includes adding it to the message list, updating the
185 * view and scrolling if appropriate, logging it, and so on.
186 *
187 * Either a pointer is kept to the message internally, or it is freed
188 * if unneeded. The caller no longer ``owns'' the message's memory.
189 *
190 * Returns 1 if the message was added to the message list, and 0 if it
191 * was ignored due to user settings or otherwise.
192 */
193int owl_process_message(owl_message *m) {
194  const owl_filter *f;
195  /* if this message it on the puntlist, nuke it and continue */
196  if (owl_global_message_is_puntable(&g, m)) {
197    owl_message_free(m);
198    return 0;
199  }
200
201  /*  login or logout that should be ignored? */
202  if (owl_global_is_ignorelogins(&g)
203      && owl_message_is_loginout(m)) {
204    owl_message_free(m);
205    return 0;
206  }
207
208  if (!owl_global_is_displayoutgoing(&g)
209      && owl_message_is_direction_out(m)) {
210    owl_message_free(m);
211    return 0;
212  }
213
214  /* add it to the global list */
215  owl_messagelist_append_element(owl_global_get_msglist(&g), m);
216  /* add it to any necessary views; right now there's only the current view */
217  owl_view_consider_message(owl_global_get_current_view(&g), m);
218
219  if(owl_message_is_direction_in(m)) {
220    /* let perl know about it*/
221    owl_perlconfig_getmsg(m, NULL);
222
223    /* do we need to autoreply? */
224    if (owl_global_is_zaway(&g) && !owl_message_get_attribute_value(m, "isauto")) {
225      if (owl_message_is_type_zephyr(m)) {
226        owl_zephyr_zaway(m);
227      } else if (owl_message_is_type_aim(m)) {
228        if (owl_message_is_private(m)) {
229          owl_function_send_aimawymsg(owl_message_get_sender(m), owl_global_get_zaway_msg(&g));
230        }
231      }
232    }
233
234    /* ring the bell if it's a personal */
235    if (!strcmp(owl_global_get_personalbell(&g), "on")) {
236      if (!owl_message_is_loginout(m) &&
237          !owl_message_is_mail(m) &&
238          owl_message_is_personal(m)) {
239        owl_function_beep();
240      }
241    } else if (!strcmp(owl_global_get_personalbell(&g), "off")) {
242      /* do nothing */
243    } else {
244      f=owl_global_get_filter(&g, owl_global_get_personalbell(&g));
245      if (f && owl_filter_message_match(f, m)) {
246        owl_function_beep();
247      }
248    }
249
250    /* if it matches the alert filter, do the alert action */
251    f=owl_global_get_filter(&g, owl_global_get_alert_filter(&g));
252    if (f && owl_filter_message_match(f, m)) {
253      owl_function_command(owl_global_get_alert_action(&g));
254    }
255
256    /* if it's a zephyr login or logout, update the zbuddylist */
257    if (owl_message_is_type_zephyr(m) && owl_message_is_loginout(m)) {
258      if (owl_message_is_login(m)) {
259        owl_zbuddylist_adduser(owl_global_get_zephyr_buddylist(&g), owl_message_get_sender(m));
260      } else if (owl_message_is_logout(m)) {
261        owl_zbuddylist_deluser(owl_global_get_zephyr_buddylist(&g), owl_message_get_sender(m));
262      } else {
263        owl_function_error("Internal error: received login notice that is neither login nor logout");
264      }
265    }
266  }
267
268  /* let perl know about it */
269  owl_perlconfig_newmsg(m, NULL);
270  /* log the message if we need to */
271  owl_log_message(m);
272
273  return 1;
274}
275
276/*
277 * Process any new messages we have waiting in the message queue.
278 * Returns 1 if any messages were added to the message list, and 0 otherwise.
279 */
280int owl_process_messages(owl_ps_action *d, void *p)
281{
282  int newmsgs=0;
283  int followlast = owl_global_should_followlast(&g);
284  owl_message *m;
285
286  /* Grab incoming messages. */
287  while (owl_global_messagequeue_pending(&g)) {
288    m = owl_global_messagequeue_popmsg(&g);
289    if (owl_process_message(m))
290      newmsgs = 1;
291  }
292
293  if (newmsgs) {
294    /* follow the last message if we're supposed to */
295    if (followlast)
296      owl_function_lastmsg_noredisplay();
297
298    /* do the newmsgproc thing */
299    owl_function_do_newmsgproc();
300
301    /* redisplay if necessary */
302    /* this should be optimized to not run if the new messages won't be displayed */
303    owl_mainwin_redisplay(owl_global_get_mainwin(&g));
304    sepbar(NULL);
305    if (owl_popwin_is_active(owl_global_get_popwin(&g))) {
306      owl_popwin_refresh(owl_global_get_popwin(&g));
307      /* TODO: this is a broken kludge */
308      if (owl_global_get_viewwin(&g)) {
309        owl_viewwin_redisplay(owl_global_get_viewwin(&g), 0);
310      }
311    }
312    owl_global_set_needrefresh(&g);
313  }
314  return newmsgs;
315}
316
317void owl_process_input(const owl_io_dispatch *d, void *data)
318{
319  owl_input j;
320  WINDOW *typwin;
321
322  typwin = owl_global_get_curs_typwin(&g);
323
324  while (1) {
325    j.ch = wgetch(typwin);
326    if (j.ch == ERR) return;
327
328    j.uch = '\0';
329    if (j.ch >= KEY_MIN && j.ch <= KEY_MAX) {
330      /* This is a curses control character. */
331    }
332    else if (j.ch > 0x7f && j.ch < 0xfe) {
333      /* Pull in a full utf-8 character. */
334      int bytes, i;
335      char utf8buf[7];
336      memset(utf8buf, '\0', 7);
337     
338      utf8buf[0] = j.ch;
339     
340      if ((j.ch & 0xc0) && (~j.ch & 0x20)) bytes = 2;
341      else if ((j.ch & 0xe0) && (~j.ch & 0x10)) bytes = 3;
342      else if ((j.ch & 0xf0) && (~j.ch & 0x08)) bytes = 4;
343      else if ((j.ch & 0xf8) && (~j.ch & 0x04)) bytes = 5;
344      else if ((j.ch & 0xfc) && (~j.ch & 0x02)) bytes = 6;
345      else bytes = 1;
346     
347      for (i = 1; i < bytes; i++) {
348        int tmp =  wgetch(typwin);
349        /* If what we got was not a byte, or not a continuation byte */
350        if (tmp > 0xff || !(tmp & 0x80 && ~tmp & 0x40)) {
351          /* ill-formed UTF-8 code unit subsequence, put back the
352             char we just got. */
353          ungetch(tmp);
354          j.ch = ERR;
355          break;
356        }
357        utf8buf[i] = tmp;
358      }
359     
360      if (j.ch != ERR) {
361        if (g_utf8_validate(utf8buf, -1, NULL)) {
362          j.uch = g_utf8_get_char(utf8buf);
363        }
364        else {
365          j.ch = ERR;
366        }
367      }
368    }
369    else if (j.ch <= 0x7f) {
370      j.uch = j.ch;
371    }
372
373    owl_process_input_char(j);
374  }
375}
376
377void sig_handler(int sig, siginfo_t *si, void *data)
378{
379  if (sig==SIGWINCH) {
380    /* we can't inturrupt a malloc here, so it just sets a flag
381     * schedulding a resize for later
382     */
383    owl_function_resize();
384  } else if (sig==SIGPIPE || sig==SIGCHLD) {
385    /* Set a flag and some info that we got the sigpipe
386     * so we can record that we got it and why... */
387    owl_global_set_errsignal(&g, sig, si);
388  } else if (sig==SIGTERM || sig==SIGHUP) {
389    owl_function_quit();
390  }
391}
392
393void sigint_handler(int sig, siginfo_t *si, void *data)
394{
395  owl_global_set_interrupted(&g);
396}
397
398void sigtstp_handler(int sig, siginfo_t *si, void *data)
399{
400  owl_global_set_got_sigstp(&g);
401}
402
403void owl_register_signal_handlers(void) {
404  struct sigaction sigact;
405
406  /* signal handler */
407  /*sigact.sa_handler=sig_handler;*/
408  sigact.sa_sigaction=sig_handler;
409  sigemptyset(&sigact.sa_mask);
410  sigact.sa_flags=SA_SIGINFO;
411  sigaction(SIGWINCH, &sigact, NULL);
412  sigaction(SIGALRM, &sigact, NULL);
413  sigaction(SIGPIPE, &sigact, NULL);
414  sigaction(SIGTERM, &sigact, NULL);
415  sigaction(SIGHUP, &sigact, NULL);
416
417  sigact.sa_sigaction=sigint_handler;
418  sigaction(SIGINT, &sigact, NULL);
419
420  sigact.sa_sigaction=sigtstp_handler;
421  sigaction(SIGTSTP, &sigact, NULL);
422}
423
424#if OWL_STDERR_REDIR
425
426/* Replaces stderr with a pipe so that we can read from it.
427 * Returns the fd of the pipe from which stderr can be read. */
428int stderr_replace(void)
429{
430  int pipefds[2];
431  if (0 != pipe(pipefds)) {
432    perror("pipe");
433    owl_function_debugmsg("stderr_replace: pipe FAILED\n");
434    return -1;
435  }
436    owl_function_debugmsg("stderr_replace: pipe: %d,%d\n", pipefds[0], pipefds[1]);
437  if (-1 == dup2(pipefds[1], 2 /*stderr*/)) {
438    owl_function_debugmsg("stderr_replace: dup2 FAILED (%s)\n", strerror(errno));
439    perror("dup2");
440    return -1;
441  }
442  return pipefds[0];
443}
444
445/* Sends stderr (read from rfd) messages to the error console */
446void stderr_redirect_handler(const owl_io_dispatch *d, void *data)
447{
448  int navail, bread;
449  char buf[4096];
450  int rfd = d->fd;
451  char *err;
452
453  if (rfd<0) return;
454  if (-1 == ioctl(rfd, FIONREAD, &navail)) {
455    return;
456  }
457  /*owl_function_debugmsg("stderr_redirect: navail = %d\n", navail);*/
458  if (navail <= 0) return;
459  if (navail > sizeof(buf)-1) {
460    navail = sizeof(buf)-1;
461  }
462  bread = read(rfd, buf, navail);
463  if (buf[navail-1] != '\0') {
464    buf[navail] = '\0';
465  }
466
467  err = owl_sprintf("[stderr]\n%s", buf);
468
469  owl_function_log_err(err);
470  owl_free(err);
471}
472
473#endif /* OWL_STDERR_REDIR */
474
475void owl_zephyr_buddycheck_timer(owl_timer *t, void *data)
476{
477  if (owl_global_is_pseudologins(&g)) {
478    owl_function_debugmsg("Doing zephyr buddy check");
479    owl_function_zephyr_buddy_check(1);
480  }
481}
482
483
484int main(int argc, char **argv, char **env)
485{
486  WINDOW *recwin, *sepwin, *typwin, *msgwin;
487  owl_editwin *tw;
488  owl_popwin *pw;
489  int argcsave;
490  const char *const *argvsave;
491  char *perlout, *perlerr;
492  const owl_style *s;
493  const char *dir;
494  owl_options opts;
495
496  if (!GLIB_CHECK_VERSION (2, 12, 0))
497    g_error ("GLib version 2.12.0 or above is needed.");
498
499  argcsave=argc;
500  argvsave=strs(argv);
501
502  setlocale(LC_ALL, "");
503
504  memset(&opts, 0, sizeof opts);
505  opts.load_initial_subs = 1;
506  owl_parse_options(argc, argv, &opts);
507  g.load_initial_subs = opts.load_initial_subs;
508
509  owl_function_debugmsg("startup: Finished parsing arguments");
510
511  owl_register_signal_handlers();
512  owl_start_curses();
513
514  /* owl global init */
515  owl_global_init(&g);
516  if (opts.rm_debug) unlink(OWL_DEBUG_FILE);
517  if (opts.debug) owl_global_set_debug_on(&g);
518  if (opts.confdir) owl_global_set_confdir(&g, opts.confdir);
519  owl_function_debugmsg("startup: first available debugging message");
520  owl_global_set_startupargs(&g, argcsave, argvsave);
521  owl_global_set_haveaim(&g);
522
523  /* register STDIN dispatch; throw away return, we won't need it */
524  owl_select_add_io_dispatch(STDIN, OWL_IO_READ, &owl_process_input, NULL, NULL);
525  owl_zephyr_initialize();
526
527#if OWL_STDERR_REDIR
528  /* Do this only after we've started curses up... */
529  owl_function_debugmsg("startup: doing stderr redirection");
530  owl_select_add_io_dispatch(stderr_replace(), OWL_IO_READ, &stderr_redirect_handler, NULL, NULL);
531#endif
532
533  /* create the owl directory, in case it does not exist */
534  owl_function_debugmsg("startup: creating owl directory, if not present");
535  dir=owl_global_get_confdir(&g);
536  mkdir(dir, S_IRWXU);
537
538  /* set the tty, either from the command line, or by figuring it out */
539  owl_function_debugmsg("startup: setting tty name");
540  if (opts.tty) {
541    owl_global_set_tty(&g, opts.tty);
542  } else {
543    owl_global_set_tty(&g, owl_util_get_default_tty());
544  }
545
546  /* Initialize perl */
547  owl_function_debugmsg("startup: processing config file");
548  owl_context_set_readconfig(owl_global_get_context(&g));
549  perlerr=owl_perlconfig_initperl(opts.configfile, &argc, &argv, &env);
550  if (perlerr) {
551    endwin();
552    fprintf(stderr, "Internal perl error: %s\n", perlerr);
553    fflush(stderr);
554    printf("Internal perl error: %s\n", perlerr);
555    fflush(stdout);
556    exit(1);
557  }
558
559  owl_global_complete_setup(&g);
560
561  owl_setup_default_filters();
562
563  /* set the current view */
564  owl_function_debugmsg("startup: setting the current view");
565  owl_view_create(owl_global_get_current_view(&g), "main",
566                  owl_global_get_filter(&g, "all"),
567                  owl_global_get_style_by_name(&g, "default"));
568
569  /* AIM init */
570  owl_function_debugmsg("startup: doing AIM initialization");
571  owl_aim_init();
572
573  /* execute the startup function in the configfile */
574  owl_function_debugmsg("startup: executing perl startup, if applicable");
575  perlout = owl_perlconfig_execute("BarnOwl::Hooks::_startup();");
576  if (perlout) owl_free(perlout);
577
578  /* hold on to the window names for convenience */
579  msgwin=owl_global_get_curs_msgwin(&g);
580  recwin=owl_global_get_curs_recwin(&g);
581  sepwin=owl_global_get_curs_sepwin(&g);
582  typwin=owl_global_get_curs_typwin(&g);
583  tw=owl_global_get_typwin(&g);
584
585  /* welcome message */
586  owl_function_debugmsg("startup: creating splash message");
587  owl_function_adminmsg("",
588    "-----------------------------------------------------------------------\n"
589    "Welcome to barnowl version " OWL_VERSION_STRING ".  Press 'h' for on-line help.\n"
590    "To see a quick introduction, type ':show quickstart'.                  \n"
591    "                                                                       \n"
592    "BarnOwl is free software. Type ':show license' for more                \n"
593    "information.                                                     ^ ^   \n"
594    "                                                                 OvO   \n"
595    "Please report any bugs or suggestions to bug-barnowl@mit.edu    (   )  \n"
596    "-----------------------------------------------------------------m-m---\n"
597  );
598  sepbar(NULL);
599
600  /* process the startup file */
601  owl_function_debugmsg("startup: processing startup file");
602  owl_function_source(NULL);
603
604  wrefresh(sepwin);
605
606  /* Set the default style */
607  owl_function_debugmsg("startup: setting startup and default style");
608  if (0 != strcmp(owl_global_get_default_style(&g), "__unspecified__")) {
609    /* the style was set by the user: leave it alone */
610  } else {
611    owl_global_set_default_style(&g, "default");
612  }
613
614  owl_function_debugmsg("startup: set style for the view: %s", owl_global_get_default_style(&g));
615  s = owl_global_get_style_by_name(&g, owl_global_get_default_style(&g));
616  if(s)
617      owl_view_set_style(owl_global_get_current_view(&g), s);
618  else
619      owl_function_error("No such style: %s", owl_global_get_default_style(&g));
620
621  owl_function_debugmsg("startup: setting context interactive");
622  owl_context_set_interactive(owl_global_get_context(&g));
623
624  owl_select_add_timer(180, 180, owl_zephyr_buddycheck_timer, NULL, NULL);
625
626  /* If we ever deprecate the mainloop hook, remove this. */
627  owl_select_add_timer(0, 1, owl_perlconfig_mainloop, NULL, NULL);
628
629  owl_select_add_pre_select_action(owl_process_messages, NULL, NULL);
630
631  owl_function_debugmsg("startup: entering main loop");
632  /* main loop */
633  while (1) {
634
635    /* if a resize has been scheduled, deal with it */
636    owl_global_resize(&g, 0, 0);
637
638    /* these are here in case a resize changes the windows */
639    msgwin=owl_global_get_curs_msgwin(&g);
640    recwin=owl_global_get_curs_recwin(&g);
641    sepwin=owl_global_get_curs_sepwin(&g);
642    typwin=owl_global_get_curs_typwin(&g);
643
644    /* if a popwin just came up, refresh it */
645    pw=owl_global_get_popwin(&g);
646    if (owl_popwin_is_active(pw) && owl_popwin_needs_first_refresh(pw)) {
647      owl_popwin_refresh(pw);
648      owl_popwin_no_needs_first_refresh(pw);
649      owl_global_set_needrefresh(&g);
650      /* TODO: this is a broken kludge */
651      if (owl_global_get_viewwin(&g)) {
652        owl_viewwin_redisplay(owl_global_get_viewwin(&g), 0);
653      }
654    }
655
656    /* update the terminal if we need to */
657    if (owl_global_is_needrefresh(&g)) {
658      /* leave the cursor in the appropriate window */
659      if (owl_global_is_typwin_active(&g)) {
660        owl_function_set_cursor(typwin);
661      } else {
662        owl_function_set_cursor(sepwin);
663      }
664      doupdate();
665      owl_global_set_noneedrefresh(&g);
666    }
667
668    /* select on FDs we know about. */
669    owl_select();
670
671    /* Log any error signals */
672    {
673      siginfo_t si;
674      int signum;
675      if ((signum = owl_global_get_errsignal_and_clear(&g, &si)) > 0) {
676        owl_function_error("Got unexpected signal: %d %s  (code: %d band: %ld  errno: %d)",
677                           signum, signum==SIGPIPE?"SIGPIPE":"SIG????",
678                           si.si_code, si.si_band, si.si_errno);
679      }
680    }
681
682  }
683}
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