source: owl.c @ dc7884d

release-1.4release-1.5release-1.6release-1.7release-1.8release-1.9
Last change on this file since dc7884d was eb6cedc, checked in by Nelson Elhage <nelhage@mit.edu>, 12 years ago
Push commands into BarnOwl:: instead of AUTOLOAD'ing them
  • Property mode set to 100644
File size: 21.5 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 <stdlib.h>
12#include <string.h>
13#include <signal.h>
14#include <time.h>
15#include <sys/param.h>
16#include <sys/types.h>
17#include <sys/time.h>
18#include <termios.h>
19#include <sys/stat.h>
20#include <locale.h>
21#include "owl.h"
22
23
24#if OWL_STDERR_REDIR
25#ifdef HAVE_SYS_IOCTL_H
26#include <sys/ioctl.h>
27#endif
28#ifdef HAVE_SYS_FILIO_H
29#include <sys/filio.h>
30#endif
31int stderr_replace(void);
32#endif
33
34#define STDIN 0
35
36static const char fileIdent[] = "$Id$";
37
38owl_global g;
39
40int main(int argc, char **argv, char **env)
41{
42  WINDOW *recwin, *sepwin, *typwin, *msgwin;
43  owl_editwin *tw;
44  owl_popwin *pw;
45  int debug, argcsave, followlast;
46  int newmsgs, nexttimediff;
47  struct sigaction sigact;
48  char *configfile, *tty, *perlout, *perlerr, **argvsave;
49  char *confdir;
50  owl_filter *f;
51  owl_style *s;
52  time_t nexttime, now;
53  struct tm *today;
54  char *dir;
55  struct termios tio;
56  owl_message *m;
57
58  if (!GLIB_CHECK_VERSION (2, 12, 0))
59    g_error ("GLib version 2.12.0 or above is needed.");
60
61  argcsave=argc;
62  argvsave=argv;
63  configfile=NULL;
64  confdir = NULL;
65  tty=NULL;
66  debug=0;
67  g.load_initial_subs = 1;
68
69  setlocale(LC_ALL, "");
70 
71  if (argc>0) {
72    argv++;
73    argc--;
74  }
75  while (argc>0) {
76    if (!strcmp(argv[0], "-n")) {
77      g.load_initial_subs = 0;
78      argv++;
79      argc--;
80    } else if (!strcmp(argv[0], "-c")) {
81      if (argc<2) {
82        fprintf(stderr, "Too few arguments to -c\n");
83        usage();
84        exit(1);
85      }
86      configfile=argv[1];
87      argv+=2;
88      argc-=2;
89    } else if (!strcmp(argv[0], "-t")) {
90      if (argc<2) {
91        fprintf(stderr, "Too few arguments to -t\n");
92        usage();
93        exit(1);
94      }
95      tty=argv[1];
96      argv+=2;
97      argc-=2;
98    } else if (!strcmp(argv[0], "-s")){
99      if (argc<2) {
100        fprintf(stderr, "Too few arguments to -s\n");
101        usage();
102        exit(1);
103      }
104      confdir = argv[1];
105      argv+=2;
106      argc-=2;
107    } else if (!strcmp(argv[0], "-d")) {
108      debug=1;
109      argv++;
110      argc--;
111    } else if (!strcmp(argv[0], "-D")) {
112      debug=1;
113      unlink(OWL_DEBUG_FILE);
114      argv++;
115      argc--;
116    } else if (!strcmp(argv[0], "-v")) {
117      printf("This is barnowl version %s\n", OWL_VERSION_STRING);
118      exit(0);
119    } else {
120      fprintf(stderr, "Unknown argument\n");
121      usage();       
122      exit(1);
123    }
124  }
125
126  owl_function_debugmsg("startup: Finished parsing arguments");
127
128  /* signal handler */
129  /*sigact.sa_handler=sig_handler;*/
130  sigact.sa_sigaction=sig_handler;
131  sigemptyset(&sigact.sa_mask);
132  sigact.sa_flags=SA_SIGINFO;
133  sigaction(SIGWINCH, &sigact, NULL);
134  sigaction(SIGALRM, &sigact, NULL);
135  sigaction(SIGPIPE, &sigact, NULL);
136  sigaction(SIGTERM, &sigact, NULL);
137  sigaction(SIGHUP, &sigact, NULL);
138
139  sigact.sa_sigaction=sigint_handler;
140  sigaction(SIGINT, &sigact, NULL);
141
142  /* save initial terminal settings */
143  tcgetattr(0, owl_global_get_startup_tio(&g));
144
145  /* turn ISTRIP off */
146  tcgetattr(0, &tio);
147  tio.c_iflag &= ~(ISTRIP|IEXTEN);
148  tio.c_cc[VQUIT] = 0;
149  tcsetattr(0, TCSAFLUSH, &tio);
150
151  /* screen init */
152  if (!getenv("TERMINFO")) {
153    owl_function_debugmsg("startup: Not setting TERMINFO");
154  } else {
155    owl_function_debugmsg("startup: leaving TERMINFO as %s from envrionment", getenv("TERMINFO"));
156  }
157  initscr();
158  start_color();
159#ifdef HAVE_USE_DEFAULT_COLORS
160  use_default_colors();
161#endif
162  cbreak();
163  noecho();
164
165  /* define simple color pairs */
166  if (has_colors() && COLOR_PAIRS>=8) {
167    int bg = COLOR_BLACK;
168#ifdef HAVE_USE_DEFAULT_COLORS
169    bg = -1;
170#endif
171    init_pair(OWL_COLOR_BLACK,   COLOR_BLACK,   bg);
172    init_pair(OWL_COLOR_RED,     COLOR_RED,     bg);
173    init_pair(OWL_COLOR_GREEN,   COLOR_GREEN,   bg);
174    init_pair(OWL_COLOR_YELLOW,  COLOR_YELLOW,  bg);
175    init_pair(OWL_COLOR_BLUE,    COLOR_BLUE,    bg);
176    init_pair(OWL_COLOR_MAGENTA, COLOR_MAGENTA, bg);
177    init_pair(OWL_COLOR_CYAN,    COLOR_CYAN,    bg);
178    init_pair(OWL_COLOR_WHITE,   COLOR_WHITE,   bg);
179  }
180
181  /* owl global init */
182  owl_global_init(&g);
183  if (debug) owl_global_set_debug_on(&g);
184  if (confdir) owl_global_set_confdir(&g, confdir);
185  owl_function_debugmsg("startup: first available debugging message");
186  owl_global_set_startupargs(&g, argcsave, argvsave);
187  owl_global_set_haveaim(&g);
188
189  /* prepare stdin dispatch */
190  {
191    owl_dispatch *d = owl_malloc(sizeof(owl_dispatch));
192    d->fd = STDIN;
193    d->cfunc = &owl_process_input;
194    d->destroy = NULL;
195    owl_select_add_dispatch(d);
196  }
197
198  owl_zephyr_initialize();
199
200#if OWL_STDERR_REDIR
201  /* Do this only after we've started curses up... */
202  {
203    owl_dispatch *d = owl_malloc(sizeof(owl_dispatch));
204    owl_function_debugmsg("startup: doing stderr redirection");
205    d->fd = stderr_replace();
206    d->cfunc = stderr_redirect_handler;
207    d->destroy = NULL;
208    owl_select_add_dispatch(d);
209  }
210#endif
211
212  /* create the owl directory, in case it does not exist */
213  owl_function_debugmsg("startup: creating owl directory, if not present");
214  dir=owl_global_get_confdir(&g);
215  mkdir(dir, S_IRWXU);
216
217  /* set the tty, either from the command line, or by figuring it out */
218  owl_function_debugmsg("startup: setting tty name");
219  if (tty) {
220    owl_global_set_tty(&g, tty);
221  } else {
222    owl_global_set_tty(&g, owl_util_get_default_tty());
223  }
224
225  /* Initialize perl */
226  owl_function_debugmsg("startup: processing config file");
227  owl_context_set_readconfig(owl_global_get_context(&g));
228  perlerr=owl_perlconfig_initperl(configfile, &argc, &argv, &env);
229  if (perlerr) {
230    endwin();
231    fprintf(stderr, "Internal perl error: %s\n", perlerr);
232    fflush(stderr);
233    printf("Internal perl error: %s\n", perlerr);
234    fflush(stdout);
235    exit(1);
236  }
237
238  owl_global_complete_setup(&g);
239
240  /* setup the default filters */
241  /* the personal filter will need to change again when AIM chat's are
242   *  included.  Also, there should be an %aimme% */
243  owl_function_debugmsg("startup: creating default filters");
244  f=owl_malloc(sizeof(owl_filter));
245  owl_filter_init_fromstring(f, "personal", "isprivate ^true$ and ( not type ^zephyr$"
246                             " or ( class ^message  ) )");
247  owl_list_append_element(owl_global_get_filterlist(&g), f);
248
249  f=owl_malloc(sizeof(owl_filter));
250  owl_filter_init_fromstring(f, "wordwrap", "not ( type ^admin$ or type ^zephyr$ ) ");
251  owl_list_append_element(owl_global_get_filterlist(&g), f);
252
253  f=owl_malloc(sizeof(owl_filter));
254  owl_filter_init_fromstring(f, "trash", "class ^mail$ or opcode ^ping$ or type ^admin$ or ( not login ^none$ )");
255  owl_list_append_element(owl_global_get_filterlist(&g), f);
256
257  f=owl_malloc(sizeof(owl_filter));
258  owl_filter_init_fromstring(f, "ping", "opcode ^ping$");
259  owl_list_append_element(owl_global_get_filterlist(&g), f);
260
261  f=owl_malloc(sizeof(owl_filter));
262  owl_filter_init_fromstring(f, "auto", "opcode ^auto$");
263  owl_list_append_element(owl_global_get_filterlist(&g), f);
264
265  f=owl_malloc(sizeof(owl_filter));
266  owl_filter_init_fromstring(f, "login", "not login ^none$");
267  owl_list_append_element(owl_global_get_filterlist(&g), f);
268
269  f=owl_malloc(sizeof(owl_filter));
270  owl_filter_init_fromstring(f, "reply-lockout", "class ^noc or class ^mail$");
271  owl_list_append_element(owl_global_get_filterlist(&g), f);
272
273  f=owl_malloc(sizeof(owl_filter));
274  owl_filter_init_fromstring(f, "out", "direction ^out$");
275  owl_list_append_element(owl_global_get_filterlist(&g), f);
276
277  f=owl_malloc(sizeof(owl_filter));
278  owl_filter_init_fromstring(f, "aim", "type ^aim$");
279  owl_list_append_element(owl_global_get_filterlist(&g), f);
280
281  f=owl_malloc(sizeof(owl_filter));
282  owl_filter_init_fromstring(f, "zephyr", "type ^zephyr$");
283  owl_list_append_element(owl_global_get_filterlist(&g), f);
284
285  f=owl_malloc(sizeof(owl_filter));
286  owl_filter_init_fromstring(f, "none", "false");
287  owl_list_append_element(owl_global_get_filterlist(&g), f);
288
289  f=owl_malloc(sizeof(owl_filter));
290  owl_filter_init_fromstring(f, "all", "true");
291  owl_list_append_element(owl_global_get_filterlist(&g), f);
292
293  /* set the current view */
294  owl_function_debugmsg("startup: setting the current view");
295  owl_view_create(owl_global_get_current_view(&g), "main", f, owl_global_get_style_by_name(&g, "default"));
296
297  /* AIM init */
298  owl_function_debugmsg("startup: doing AIM initialization");
299  owl_aim_init();
300
301  /* execute the startup function in the configfile */
302  owl_function_debugmsg("startup: executing perl startup, if applicable");
303  perlout = owl_perlconfig_execute("BarnOwl::Hooks::_startup();");
304  if (perlout) owl_free(perlout);
305
306  /* hold on to the window names for convenience */
307  msgwin=owl_global_get_curs_msgwin(&g);
308  recwin=owl_global_get_curs_recwin(&g);
309  sepwin=owl_global_get_curs_sepwin(&g);
310  typwin=owl_global_get_curs_typwin(&g);
311  tw=owl_global_get_typwin(&g);
312
313  /* welcome message */
314  owl_function_debugmsg("startup: creating splash message");
315  owl_function_adminmsg("",
316    "-----------------------------------------------------------------------\n"
317    "Welcome to barnowl version " OWL_VERSION_STRING ".  Press 'h' for on-line help.\n"
318    "To see a quick introduction, type ':show quickstart'.                  \n"
319    "                                                                       \n"
320    "BarnOwl is free software. Type ':show license' for more                \n"
321    "information.                                                     ^ ^   \n"
322    "                                                                 OvO   \n"
323    "Please report any bugs or suggestions to bug-barnowl@mit.edu    (   )  \n"
324    "-----------------------------------------------------------------m-m---\n"
325  );
326  sepbar(NULL);
327
328  /* process the startup file */
329  owl_function_debugmsg("startup: processing startup file");
330  owl_function_source(NULL);
331
332  wrefresh(sepwin);
333
334  /* First buddy check to sync the list without notifications */
335  owl_function_debugmsg("startup: doing initial zephyr buddy check");
336  /* owl_function_zephyr_buddy_check(0); */
337
338  /* set the startup and default style, based on userclue and presence of a
339   * formatting function */
340  owl_function_debugmsg("startup: setting startup and default style");
341  if (0 != strcmp(owl_global_get_default_style(&g), "__unspecified__")) {
342    /* the style was set by the user: leave it alone */
343  } else {
344    owl_global_set_default_style(&g, "default");
345  }
346
347  owl_function_debugmsg("startup: set style for the view: %s", owl_global_get_default_style(&g));
348  s = owl_global_get_style_by_name(&g, owl_global_get_default_style(&g));
349  if(s)
350      owl_view_set_style(owl_global_get_current_view(&g), s);
351  else
352      owl_function_error("No such style: %s", owl_global_get_default_style(&g));
353
354  owl_function_debugmsg("startup: setting context interactive");
355  owl_context_set_interactive(owl_global_get_context(&g));
356
357  nexttimediff=10;
358  nexttime=time(NULL);
359
360
361  owl_select_add_timer(180, 180, owl_zephyr_buddycheck_timer, NULL, NULL);
362
363  /* If we ever deprecate the mainloop hook, remove this. */
364  owl_select_add_timer(0, 1, owl_perlconfig_mainloop, NULL, NULL);
365
366
367  owl_function_debugmsg("startup: entering main loop");
368  /* main loop */
369  while (1) {
370
371    /* if a resize has been scheduled, deal with it */
372    owl_global_resize(&g, 0, 0);
373
374    /* these are here in case a resize changes the windows */
375    msgwin=owl_global_get_curs_msgwin(&g);
376    recwin=owl_global_get_curs_recwin(&g);
377    sepwin=owl_global_get_curs_sepwin(&g);
378    typwin=owl_global_get_curs_typwin(&g);
379
380    followlast=owl_global_should_followlast(&g);
381
382    /* little hack */
383    now=time(NULL);
384    today=localtime(&now);
385    if (today->tm_mon==9 && today->tm_mday==31 && owl_global_get_runtime(&g)<600) {
386      if (time(NULL)>nexttime) {
387        if (nexttimediff==1) {
388          nexttimediff=10;
389        } else {
390          nexttimediff=1;
391        }
392        nexttime+=nexttimediff;
393        owl_hack_animate();
394      }
395    }
396
397    /* Grab incoming messages. */
398    newmsgs=0;
399    while(owl_global_messagequeue_pending(&g)) {
400
401      m = owl_global_messagequeue_popmsg(&g);
402
403      if(owl_process_message(m))
404        newmsgs = 1;
405    }
406
407    /* follow the last message if we're supposed to */
408    if (newmsgs && followlast) {
409      owl_function_lastmsg_noredisplay();
410    }
411
412    /* do the newmsgproc thing */
413    if (newmsgs) {
414      owl_function_do_newmsgproc();
415    }
416   
417    /* redisplay if necessary */
418    /* this should be optimized to not run if the new messages won't be displayed */
419    if (newmsgs) {
420      owl_mainwin_redisplay(owl_global_get_mainwin(&g));
421      sepbar(NULL);
422      if (owl_popwin_is_active(owl_global_get_popwin(&g))) {
423        owl_popwin_refresh(owl_global_get_popwin(&g));
424        /* TODO: this is a broken kludge */
425        if (owl_global_get_viewwin(&g)) {
426          owl_viewwin_redisplay(owl_global_get_viewwin(&g), 0);
427        }
428      }
429      owl_global_set_needrefresh(&g);
430    }
431
432    /* if a popwin just came up, refresh it */
433    pw=owl_global_get_popwin(&g);
434    if (owl_popwin_is_active(pw) && owl_popwin_needs_first_refresh(pw)) {
435      owl_popwin_refresh(pw);
436      owl_popwin_no_needs_first_refresh(pw);
437      owl_global_set_needrefresh(&g);
438      /* TODO: this is a broken kludge */
439      if (owl_global_get_viewwin(&g)) {
440        owl_viewwin_redisplay(owl_global_get_viewwin(&g), 0);
441      }
442    }
443
444    /* update the terminal if we need to */
445    if (owl_global_is_needrefresh(&g)) {
446      /* leave the cursor in the appropriate window */
447      if (owl_global_is_typwin_active(&g)) {
448        owl_function_set_cursor(typwin);
449      } else {
450        owl_function_set_cursor(sepwin);
451      }
452      doupdate();
453      owl_global_set_noneedrefresh(&g);
454    }
455
456    /* Some calls into libzephyr call Z_WaitForNotice(), which has its
457     * own select loop and may leave zephyrs on the queue. Check for
458     * them now, and process any we find. */
459    owl_zephyr_process_events(NULL);
460
461    /* select on FDs we know about. */
462    owl_select();
463
464    /* Log any error signals */
465    {
466      siginfo_t si;
467      int signum;
468      if ((signum = owl_global_get_errsignal_and_clear(&g, &si)) > 0) {
469        owl_function_error("Got unexpected signal: %d %s  (code: %d band: %ld  errno: %d)",
470                           signum, signum==SIGPIPE?"SIGPIPE":"SIG????",
471                           si.si_code, si.si_band, si.si_errno);
472      }
473    }
474
475  }
476}
477
478/*
479 * Process a new message passed to us on the message queue from some
480 * protocol. This includes adding it to the message list, updating the
481 * view and scrolling if appropriate, logging it, and so on.
482 *
483 * Either a pointer is kept to the message internally, or it is freed
484 * if unneeded. The caller no longer ``owns'' the message's memory.
485 *
486 * Returns 1 if the message was added to the message list, and 0 if it
487 * was ignored due to user settings or otherwise.
488 */
489int owl_process_message(owl_message *m) {
490  owl_filter *f;
491  /* if this message it on the puntlist, nuke it and continue */
492  if (owl_global_message_is_puntable(&g, m)) {
493    owl_message_free(m);
494    return 0;
495  }
496
497  /*  login or logout that should be ignored? */
498  if (owl_global_is_ignorelogins(&g)
499      && owl_message_is_loginout(m)) {
500    owl_message_free(m);
501    return 0;
502  }
503
504  if (!owl_global_is_displayoutgoing(&g)
505      && owl_message_is_direction_out(m)) {
506    owl_message_free(m);
507    return 0;
508  }
509
510  /* add it to the global list */
511  owl_messagelist_append_element(owl_global_get_msglist(&g), m);
512  /* add it to any necessary views; right now there's only the current view */
513  owl_view_consider_message(owl_global_get_current_view(&g), m);
514
515  if(owl_message_is_direction_in(m)) {
516    /* let perl know about it*/
517    owl_perlconfig_getmsg(m, NULL);
518
519    /* do we need to autoreply? */
520    if (owl_global_is_zaway(&g) && !owl_message_get_attribute_value(m, "isauto")) {
521      if (owl_message_is_type_zephyr(m)) {
522        owl_zephyr_zaway(m);
523      } else if (owl_message_is_type_aim(m)) {
524        if (owl_message_is_private(m)) {
525          owl_function_send_aimawymsg(owl_message_get_sender(m), owl_global_get_zaway_msg(&g));
526        }
527      }
528    }
529
530    /* ring the bell if it's a personal */
531    if (!strcmp(owl_global_get_personalbell(&g), "on")) {
532      if (!owl_message_is_loginout(m) &&
533          !owl_message_is_mail(m) &&
534          owl_message_is_personal(m)) {
535        owl_function_beep();
536      }
537    } else if (!strcmp(owl_global_get_personalbell(&g), "off")) {
538      /* do nothing */
539    } else {
540      f=owl_global_get_filter(&g, owl_global_get_personalbell(&g));
541      if (f && owl_filter_message_match(f, m)) {
542        owl_function_beep();
543      }
544    }
545
546    /* if it matches the alert filter, do the alert action */
547    f=owl_global_get_filter(&g, owl_global_get_alert_filter(&g));
548    if (f && owl_filter_message_match(f, m)) {
549      owl_function_command(owl_global_get_alert_action(&g));
550    }
551
552    /* if it's a zephyr login or logout, update the zbuddylist */
553    if (owl_message_is_type_zephyr(m) && owl_message_is_loginout(m)) {
554      if (owl_message_is_login(m)) {
555        owl_zbuddylist_adduser(owl_global_get_zephyr_buddylist(&g), owl_message_get_sender(m));
556      } else if (owl_message_is_logout(m)) {
557        owl_zbuddylist_deluser(owl_global_get_zephyr_buddylist(&g), owl_message_get_sender(m));
558      } else {
559        owl_function_error("Internal error: received login notice that is neither login nor logout");
560      }
561    }
562  }
563
564  /* let perl know about it */
565  owl_perlconfig_newmsg(m, NULL);
566  /* log the message if we need to */
567  owl_log_message(m);
568
569  return 1;
570}
571
572void owl_process_input(owl_dispatch *d)
573{
574  owl_input j;
575  WINDOW *typwin;
576
577  typwin = owl_global_get_curs_typwin(&g);
578
579  while (1) {
580    j.ch = wgetch(typwin);
581    if (j.ch == ERR) return;
582
583    j.uch = '\0';
584    if (j.ch >= KEY_MIN && j.ch <= KEY_MAX) {
585      /* This is a curses control character. */
586    }
587    else if (j.ch > 0x7f && j.ch < 0xfe) {
588      /* Pull in a full utf-8 character. */
589      int bytes, i;
590      char utf8buf[7];
591      memset(utf8buf, '\0', 7);
592     
593      utf8buf[0] = j.ch;
594     
595      if ((j.ch & 0xc0) && (~j.ch & 0x20)) bytes = 2;
596      else if ((j.ch & 0xe0) && (~j.ch & 0x10)) bytes = 3;
597      else if ((j.ch & 0xf0) && (~j.ch & 0x08)) bytes = 4;
598      else if ((j.ch & 0xf8) && (~j.ch & 0x04)) bytes = 5;
599      else if ((j.ch & 0xfc) && (~j.ch & 0x02)) bytes = 6;
600      else bytes = 1;
601     
602      for (i = 1; i < bytes; i++) {
603        int tmp =  wgetch(typwin);
604        /* If what we got was not a byte, or not a continuation byte */
605        if (tmp > 0xff || !(tmp & 0x80 && ~tmp & 0x40)) {
606          /* ill-formed UTF-8 code unit subsequence, put back the
607             char we just got. */
608          ungetch(tmp);
609          j.ch = ERR;
610          break;
611        }
612        utf8buf[i] = tmp;
613      }
614     
615      if (j.ch != ERR) {
616        if (g_utf8_validate(utf8buf, -1, NULL)) {
617          j.uch = g_utf8_get_char(utf8buf);
618        }
619        else {
620          j.ch = ERR;
621        }
622      }
623    }
624    else if (j.ch <= 0x7f) {
625      j.uch = j.ch;
626    }
627
628    owl_process_input_char(j);
629  }
630}
631
632void sig_handler(int sig, siginfo_t *si, void *data)
633{
634  if (sig==SIGWINCH) {
635    /* we can't inturrupt a malloc here, so it just sets a flag
636     * schedulding a resize for later
637     */
638    owl_function_resize();
639  } else if (sig==SIGPIPE || sig==SIGCHLD) {
640    /* Set a flag and some info that we got the sigpipe
641     * so we can record that we got it and why... */
642    owl_global_set_errsignal(&g, sig, si);
643  } else if (sig==SIGTERM || sig==SIGHUP) {
644    owl_function_quit();
645  }
646}
647
648void sigint_handler(int sig, siginfo_t *si, void *data)
649{
650  owl_global_set_interrupted(&g);
651}
652
653void usage()
654{
655  fprintf(stderr, "Barnowl version %s\n", OWL_VERSION_STRING);
656  fprintf(stderr, "Usage: barnowl [-n] [-d] [-D] [-v] [-h] [-c <configfile>] [-s <confdir>] [-t <ttyname>]\n");
657  fprintf(stderr, "  -n      don't load zephyr subscriptions\n");
658  fprintf(stderr, "  -d      enable debugging\n");
659  fprintf(stderr, "  -D      enable debugging and delete previous debug file\n");
660  fprintf(stderr, "  -v      print the Barnowl version number and exit\n");
661  fprintf(stderr, "  -h      print this help message\n");
662  fprintf(stderr, "  -c      specify an alternate config file\n");
663  fprintf(stderr, "  -s      specify an alternate config dir (default ~/.owl)\n");
664  fprintf(stderr, "  -t      set the tty name\n");
665}
666
667#if OWL_STDERR_REDIR
668
669/* Replaces stderr with a pipe so that we can read from it.
670 * Returns the fd of the pipe from which stderr can be read. */
671int stderr_replace(void)
672{
673  int pipefds[2];
674  if (0 != pipe(pipefds)) {
675    perror("pipe");
676    owl_function_debugmsg("stderr_replace: pipe FAILED\n");
677    return -1;
678  }
679    owl_function_debugmsg("stderr_replace: pipe: %d,%d\n", pipefds[0], pipefds[1]);
680  if (-1 == dup2(pipefds[1], 2 /*stderr*/)) {
681    owl_function_debugmsg("stderr_replace: dup2 FAILED (%s)\n", strerror(errno));
682    perror("dup2");
683    return -1;
684  }
685  return pipefds[0];
686}
687
688/* Sends stderr (read from rfd) messages to the error console */
689void stderr_redirect_handler(owl_dispatch *d)
690{
691  int navail, bread;
692  char buf[4096];
693  int rfd = d->fd;
694  char *err;
695
696  if (rfd<0) return;
697  if (-1 == ioctl(rfd, FIONREAD, (void*)&navail)) {
698    return;
699  }
700  /*owl_function_debugmsg("stderr_redirect: navail = %d\n", navail);*/
701  if (navail <= 0) return;
702  if (navail > sizeof(buf)-1) {
703    navail = sizeof(buf)-1;
704  }
705  bread = read(rfd, buf, navail);
706  if (buf[navail-1] != '\0') {
707    buf[navail] = '\0';
708  }
709
710  err = owl_sprintf("[stderr]\n%s", buf);
711
712  owl_function_log_err(err);
713}
714
715#endif /* OWL_STDERR_REDIR */
716
717void owl_zephyr_buddycheck_timer(owl_timer *t, void *data)
718{
719  if (owl_global_is_pseudologins(&g)) {
720    owl_function_debugmsg("Doing zephyr buddy check");
721    owl_function_zephyr_buddy_check(1);
722  }
723}
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