source: owl.c @ c08c70a

release-1.4release-1.5release-1.6release-1.7release-1.8release-1.9
Last change on this file since c08c70a was e19eb97, checked in by Anders Kaseorg <andersk@mit.edu>, 12 years ago
Add const qualifiers for char * and void *. Signed-off-by: Anders Kaseorg <andersk@mit.edu>
  • 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
36owl_global g;
37
38int main(int argc, char **argv, char **env)
39{
40  WINDOW *recwin, *sepwin, *typwin, *msgwin;
41  owl_editwin *tw;
42  owl_popwin *pw;
43  int debug, argcsave, followlast;
44  int newmsgs, nexttimediff;
45  struct sigaction sigact;
46  const char *configfile, *tty, *const *argvsave;
47  char *perlout, *perlerr;
48  const char *confdir;
49  owl_filter *f;
50  owl_style *s;
51  time_t nexttime, now;
52  struct tm *today;
53  const char *dir;
54  struct termios tio;
55  owl_message *m;
56
57  if (!GLIB_CHECK_VERSION (2, 12, 0))
58    g_error ("GLib version 2.12.0 or above is needed.");
59
60  argcsave=argc;
61  argvsave=strs(argv);
62  configfile=NULL;
63  confdir = NULL;
64  tty=NULL;
65  debug=0;
66  g.load_initial_subs = 1;
67
68  setlocale(LC_ALL, "");
69 
70  if (argc>0) {
71    argv++;
72    argc--;
73  }
74  while (argc>0) {
75    if (!strcmp(argv[0], "-n")) {
76      g.load_initial_subs = 0;
77      argv++;
78      argc--;
79    } else if (!strcmp(argv[0], "-c")) {
80      if (argc<2) {
81        fprintf(stderr, "Too few arguments to -c\n");
82        usage();
83        exit(1);
84      }
85      configfile=argv[1];
86      argv+=2;
87      argc-=2;
88    } else if (!strcmp(argv[0], "-t")) {
89      if (argc<2) {
90        fprintf(stderr, "Too few arguments to -t\n");
91        usage();
92        exit(1);
93      }
94      tty=argv[1];
95      argv+=2;
96      argc-=2;
97    } else if (!strcmp(argv[0], "-s")){
98      if (argc<2) {
99        fprintf(stderr, "Too few arguments to -s\n");
100        usage();
101        exit(1);
102      }
103      confdir = argv[1];
104      argv+=2;
105      argc-=2;
106    } else if (!strcmp(argv[0], "-d")) {
107      debug=1;
108      argv++;
109      argc--;
110    } else if (!strcmp(argv[0], "-D")) {
111      debug=1;
112      unlink(OWL_DEBUG_FILE);
113      argv++;
114      argc--;
115    } else if (!strcmp(argv[0], "-v")) {
116      printf("This is barnowl version %s\n", OWL_VERSION_STRING);
117      exit(0);
118    } else {
119      fprintf(stderr, "Unknown argument\n");
120      usage();       
121      exit(1);
122    }
123  }
124
125  owl_function_debugmsg("startup: Finished parsing arguments");
126
127  /* signal handler */
128  /*sigact.sa_handler=sig_handler;*/
129  sigact.sa_sigaction=sig_handler;
130  sigemptyset(&sigact.sa_mask);
131  sigact.sa_flags=SA_SIGINFO;
132  sigaction(SIGWINCH, &sigact, NULL);
133  sigaction(SIGALRM, &sigact, NULL);
134  sigaction(SIGPIPE, &sigact, NULL);
135  sigaction(SIGTERM, &sigact, NULL);
136  sigaction(SIGHUP, &sigact, NULL);
137
138  sigact.sa_sigaction=sigint_handler;
139  sigaction(SIGINT, &sigact, NULL);
140
141  /* save initial terminal settings */
142  tcgetattr(0, owl_global_get_startup_tio(&g));
143
144  /* turn ISTRIP off */
145  tcgetattr(0, &tio);
146  tio.c_iflag &= ~(ISTRIP|IEXTEN);
147  tio.c_cc[VQUIT] = 0;
148  tcsetattr(0, TCSAFLUSH, &tio);
149
150  /* screen init */
151  if (!getenv("TERMINFO")) {
152    owl_function_debugmsg("startup: Not setting TERMINFO");
153  } else {
154    owl_function_debugmsg("startup: leaving TERMINFO as %s from envrionment", getenv("TERMINFO"));
155  }
156  initscr();
157  start_color();
158#ifdef HAVE_USE_DEFAULT_COLORS
159  use_default_colors();
160#endif
161  cbreak();
162  noecho();
163
164  /* define simple color pairs */
165  if (has_colors() && COLOR_PAIRS>=8) {
166    int bg = COLOR_BLACK;
167#ifdef HAVE_USE_DEFAULT_COLORS
168    bg = -1;
169#endif
170    init_pair(OWL_COLOR_BLACK,   COLOR_BLACK,   bg);
171    init_pair(OWL_COLOR_RED,     COLOR_RED,     bg);
172    init_pair(OWL_COLOR_GREEN,   COLOR_GREEN,   bg);
173    init_pair(OWL_COLOR_YELLOW,  COLOR_YELLOW,  bg);
174    init_pair(OWL_COLOR_BLUE,    COLOR_BLUE,    bg);
175    init_pair(OWL_COLOR_MAGENTA, COLOR_MAGENTA, bg);
176    init_pair(OWL_COLOR_CYAN,    COLOR_CYAN,    bg);
177    init_pair(OWL_COLOR_WHITE,   COLOR_WHITE,   bg);
178  }
179
180  /* owl global init */
181  owl_global_init(&g);
182  if (debug) owl_global_set_debug_on(&g);
183  if (confdir) owl_global_set_confdir(&g, confdir);
184  owl_function_debugmsg("startup: first available debugging message");
185  owl_global_set_startupargs(&g, argcsave, argvsave);
186  owl_global_set_haveaim(&g);
187
188  /* prepare stdin dispatch */
189  {
190    owl_dispatch *d = owl_malloc(sizeof(owl_dispatch));
191    d->fd = STDIN;
192    d->cfunc = &owl_process_input;
193    d->destroy = NULL;
194    owl_select_add_dispatch(d);
195  }
196
197  owl_zephyr_initialize();
198
199#if OWL_STDERR_REDIR
200  /* Do this only after we've started curses up... */
201  {
202    owl_dispatch *d = owl_malloc(sizeof(owl_dispatch));
203    owl_function_debugmsg("startup: doing stderr redirection");
204    d->fd = stderr_replace();
205    d->cfunc = stderr_redirect_handler;
206    d->destroy = NULL;
207    owl_select_add_dispatch(d);
208  }
209#endif
210
211  /* create the owl directory, in case it does not exist */
212  owl_function_debugmsg("startup: creating owl directory, if not present");
213  dir=owl_global_get_confdir(&g);
214  mkdir(dir, S_IRWXU);
215
216  /* set the tty, either from the command line, or by figuring it out */
217  owl_function_debugmsg("startup: setting tty name");
218  if (tty) {
219    owl_global_set_tty(&g, tty);
220  } else {
221    owl_global_set_tty(&g, owl_util_get_default_tty());
222  }
223
224  /* Initialize perl */
225  owl_function_debugmsg("startup: processing config file");
226  owl_context_set_readconfig(owl_global_get_context(&g));
227  perlerr=owl_perlconfig_initperl(configfile, &argc, &argv, &env);
228  if (perlerr) {
229    endwin();
230    fprintf(stderr, "Internal perl error: %s\n", perlerr);
231    fflush(stderr);
232    printf("Internal perl error: %s\n", perlerr);
233    fflush(stdout);
234    exit(1);
235  }
236
237  owl_global_complete_setup(&g);
238
239  /* setup the default filters */
240  /* the personal filter will need to change again when AIM chat's are
241   *  included.  Also, there should be an %aimme% */
242  owl_function_debugmsg("startup: creating default filters");
243  f=owl_malloc(sizeof(owl_filter));
244  owl_filter_init_fromstring(f, "personal", "isprivate ^true$ and ( not type ^zephyr$"
245                             " or ( class ^message  ) )");
246  owl_list_append_element(owl_global_get_filterlist(&g), f);
247
248  f=owl_malloc(sizeof(owl_filter));
249  owl_filter_init_fromstring(f, "wordwrap", "not ( type ^admin$ or type ^zephyr$ ) ");
250  owl_list_append_element(owl_global_get_filterlist(&g), f);
251
252  f=owl_malloc(sizeof(owl_filter));
253  owl_filter_init_fromstring(f, "trash", "class ^mail$ or opcode ^ping$ or type ^admin$ or ( not login ^none$ )");
254  owl_list_append_element(owl_global_get_filterlist(&g), f);
255
256  f=owl_malloc(sizeof(owl_filter));
257  owl_filter_init_fromstring(f, "ping", "opcode ^ping$");
258  owl_list_append_element(owl_global_get_filterlist(&g), f);
259
260  f=owl_malloc(sizeof(owl_filter));
261  owl_filter_init_fromstring(f, "auto", "opcode ^auto$");
262  owl_list_append_element(owl_global_get_filterlist(&g), f);
263
264  f=owl_malloc(sizeof(owl_filter));
265  owl_filter_init_fromstring(f, "login", "not login ^none$");
266  owl_list_append_element(owl_global_get_filterlist(&g), f);
267
268  f=owl_malloc(sizeof(owl_filter));
269  owl_filter_init_fromstring(f, "reply-lockout", "class ^noc or class ^mail$");
270  owl_list_append_element(owl_global_get_filterlist(&g), f);
271
272  f=owl_malloc(sizeof(owl_filter));
273  owl_filter_init_fromstring(f, "out", "direction ^out$");
274  owl_list_append_element(owl_global_get_filterlist(&g), f);
275
276  f=owl_malloc(sizeof(owl_filter));
277  owl_filter_init_fromstring(f, "aim", "type ^aim$");
278  owl_list_append_element(owl_global_get_filterlist(&g), f);
279
280  f=owl_malloc(sizeof(owl_filter));
281  owl_filter_init_fromstring(f, "zephyr", "type ^zephyr$");
282  owl_list_append_element(owl_global_get_filterlist(&g), f);
283
284  f=owl_malloc(sizeof(owl_filter));
285  owl_filter_init_fromstring(f, "none", "false");
286  owl_list_append_element(owl_global_get_filterlist(&g), f);
287
288  f=owl_malloc(sizeof(owl_filter));
289  owl_filter_init_fromstring(f, "all", "true");
290  owl_list_append_element(owl_global_get_filterlist(&g), f);
291
292  /* set the current view */
293  owl_function_debugmsg("startup: setting the current view");
294  owl_view_create(owl_global_get_current_view(&g), "main", f, owl_global_get_style_by_name(&g, "default"));
295
296  /* AIM init */
297  owl_function_debugmsg("startup: doing AIM initialization");
298  owl_aim_init();
299
300  /* execute the startup function in the configfile */
301  owl_function_debugmsg("startup: executing perl startup, if applicable");
302  perlout = owl_perlconfig_execute("BarnOwl::Hooks::_startup();");
303  if (perlout) owl_free(perlout);
304
305  /* hold on to the window names for convenience */
306  msgwin=owl_global_get_curs_msgwin(&g);
307  recwin=owl_global_get_curs_recwin(&g);
308  sepwin=owl_global_get_curs_sepwin(&g);
309  typwin=owl_global_get_curs_typwin(&g);
310  tw=owl_global_get_typwin(&g);
311
312  /* welcome message */
313  owl_function_debugmsg("startup: creating splash message");
314  owl_function_adminmsg("",
315    "-----------------------------------------------------------------------\n"
316    "Welcome to barnowl version " OWL_VERSION_STRING ".  Press 'h' for on-line help.\n"
317    "To see a quick introduction, type ':show quickstart'.                  \n"
318    "                                                                       \n"
319    "BarnOwl is free software. Type ':show license' for more                \n"
320    "information.                                                     ^ ^   \n"
321    "                                                                 OvO   \n"
322    "Please report any bugs or suggestions to bug-barnowl@mit.edu    (   )  \n"
323    "-----------------------------------------------------------------m-m---\n"
324  );
325  sepbar(NULL);
326
327  /* process the startup file */
328  owl_function_debugmsg("startup: processing startup file");
329  owl_function_source(NULL);
330
331  wrefresh(sepwin);
332
333  /* First buddy check to sync the list without notifications */
334  owl_function_debugmsg("startup: doing initial zephyr buddy check");
335  /* owl_function_zephyr_buddy_check(0); */
336
337  /* set the startup and default style, based on userclue and presence of a
338   * formatting function */
339  owl_function_debugmsg("startup: setting startup and default style");
340  if (0 != strcmp(owl_global_get_default_style(&g), "__unspecified__")) {
341    /* the style was set by the user: leave it alone */
342  } else {
343    owl_global_set_default_style(&g, "default");
344  }
345
346  owl_function_debugmsg("startup: set style for the view: %s", owl_global_get_default_style(&g));
347  s = owl_global_get_style_by_name(&g, owl_global_get_default_style(&g));
348  if(s)
349      owl_view_set_style(owl_global_get_current_view(&g), s);
350  else
351      owl_function_error("No such style: %s", owl_global_get_default_style(&g));
352
353  owl_function_debugmsg("startup: setting context interactive");
354  owl_context_set_interactive(owl_global_get_context(&g));
355
356  nexttimediff=10;
357  nexttime=time(NULL);
358
359
360  owl_select_add_timer(180, 180, owl_zephyr_buddycheck_timer, NULL, NULL);
361
362  /* If we ever deprecate the mainloop hook, remove this. */
363  owl_select_add_timer(0, 1, owl_perlconfig_mainloop, NULL, NULL);
364
365
366  owl_function_debugmsg("startup: entering main loop");
367  /* main loop */
368  while (1) {
369
370    /* if a resize has been scheduled, deal with it */
371    owl_global_resize(&g, 0, 0);
372
373    /* these are here in case a resize changes the windows */
374    msgwin=owl_global_get_curs_msgwin(&g);
375    recwin=owl_global_get_curs_recwin(&g);
376    sepwin=owl_global_get_curs_sepwin(&g);
377    typwin=owl_global_get_curs_typwin(&g);
378
379    followlast=owl_global_should_followlast(&g);
380
381    /* little hack */
382    now=time(NULL);
383    today=localtime(&now);
384    if (today->tm_mon==9 && today->tm_mday==31 && owl_global_get_runtime(&g)<600) {
385      if (time(NULL)>nexttime) {
386        if (nexttimediff==1) {
387          nexttimediff=10;
388        } else {
389          nexttimediff=1;
390        }
391        nexttime+=nexttimediff;
392        owl_hack_animate();
393      }
394    }
395
396    /* Grab incoming messages. */
397    newmsgs=0;
398    while(owl_global_messagequeue_pending(&g)) {
399
400      m = owl_global_messagequeue_popmsg(&g);
401
402      if(owl_process_message(m))
403        newmsgs = 1;
404    }
405
406    /* follow the last message if we're supposed to */
407    if (newmsgs && followlast) {
408      owl_function_lastmsg_noredisplay();
409    }
410
411    /* do the newmsgproc thing */
412    if (newmsgs) {
413      owl_function_do_newmsgproc();
414    }
415   
416    /* redisplay if necessary */
417    /* this should be optimized to not run if the new messages won't be displayed */
418    if (newmsgs) {
419      owl_mainwin_redisplay(owl_global_get_mainwin(&g));
420      sepbar(NULL);
421      if (owl_popwin_is_active(owl_global_get_popwin(&g))) {
422        owl_popwin_refresh(owl_global_get_popwin(&g));
423        /* TODO: this is a broken kludge */
424        if (owl_global_get_viewwin(&g)) {
425          owl_viewwin_redisplay(owl_global_get_viewwin(&g), 0);
426        }
427      }
428      owl_global_set_needrefresh(&g);
429    }
430
431    /* if a popwin just came up, refresh it */
432    pw=owl_global_get_popwin(&g);
433    if (owl_popwin_is_active(pw) && owl_popwin_needs_first_refresh(pw)) {
434      owl_popwin_refresh(pw);
435      owl_popwin_no_needs_first_refresh(pw);
436      owl_global_set_needrefresh(&g);
437      /* TODO: this is a broken kludge */
438      if (owl_global_get_viewwin(&g)) {
439        owl_viewwin_redisplay(owl_global_get_viewwin(&g), 0);
440      }
441    }
442
443    /* update the terminal if we need to */
444    if (owl_global_is_needrefresh(&g)) {
445      /* leave the cursor in the appropriate window */
446      if (owl_global_is_typwin_active(&g)) {
447        owl_function_set_cursor(typwin);
448      } else {
449        owl_function_set_cursor(sepwin);
450      }
451      doupdate();
452      owl_global_set_noneedrefresh(&g);
453    }
454
455    /* Some calls into libzephyr call Z_WaitForNotice(), which has its
456     * own select loop and may leave zephyrs on the queue. Check for
457     * them now, and process any we find. */
458    owl_zephyr_process_events(NULL);
459
460    /* select on FDs we know about. */
461    owl_select();
462
463    /* Log any error signals */
464    {
465      siginfo_t si;
466      int signum;
467      if ((signum = owl_global_get_errsignal_and_clear(&g, &si)) > 0) {
468        owl_function_error("Got unexpected signal: %d %s  (code: %d band: %ld  errno: %d)",
469                           signum, signum==SIGPIPE?"SIGPIPE":"SIG????",
470                           si.si_code, si.si_band, si.si_errno);
471      }
472    }
473
474  }
475}
476
477/*
478 * Process a new message passed to us on the message queue from some
479 * protocol. This includes adding it to the message list, updating the
480 * view and scrolling if appropriate, logging it, and so on.
481 *
482 * Either a pointer is kept to the message internally, or it is freed
483 * if unneeded. The caller no longer ``owns'' the message's memory.
484 *
485 * Returns 1 if the message was added to the message list, and 0 if it
486 * was ignored due to user settings or otherwise.
487 */
488int owl_process_message(owl_message *m) {
489  owl_filter *f;
490  /* if this message it on the puntlist, nuke it and continue */
491  if (owl_global_message_is_puntable(&g, m)) {
492    owl_message_free(m);
493    return 0;
494  }
495
496  /*  login or logout that should be ignored? */
497  if (owl_global_is_ignorelogins(&g)
498      && owl_message_is_loginout(m)) {
499    owl_message_free(m);
500    return 0;
501  }
502
503  if (!owl_global_is_displayoutgoing(&g)
504      && owl_message_is_direction_out(m)) {
505    owl_message_free(m);
506    return 0;
507  }
508
509  /* add it to the global list */
510  owl_messagelist_append_element(owl_global_get_msglist(&g), m);
511  /* add it to any necessary views; right now there's only the current view */
512  owl_view_consider_message(owl_global_get_current_view(&g), m);
513
514  if(owl_message_is_direction_in(m)) {
515    /* let perl know about it*/
516    owl_perlconfig_getmsg(m, NULL);
517
518    /* do we need to autoreply? */
519    if (owl_global_is_zaway(&g) && !owl_message_get_attribute_value(m, "isauto")) {
520      if (owl_message_is_type_zephyr(m)) {
521        owl_zephyr_zaway(m);
522      } else if (owl_message_is_type_aim(m)) {
523        if (owl_message_is_private(m)) {
524          owl_function_send_aimawymsg(owl_message_get_sender(m), owl_global_get_zaway_msg(&g));
525        }
526      }
527    }
528
529    /* ring the bell if it's a personal */
530    if (!strcmp(owl_global_get_personalbell(&g), "on")) {
531      if (!owl_message_is_loginout(m) &&
532          !owl_message_is_mail(m) &&
533          owl_message_is_personal(m)) {
534        owl_function_beep();
535      }
536    } else if (!strcmp(owl_global_get_personalbell(&g), "off")) {
537      /* do nothing */
538    } else {
539      f=owl_global_get_filter(&g, owl_global_get_personalbell(&g));
540      if (f && owl_filter_message_match(f, m)) {
541        owl_function_beep();
542      }
543    }
544
545    /* if it matches the alert filter, do the alert action */
546    f=owl_global_get_filter(&g, owl_global_get_alert_filter(&g));
547    if (f && owl_filter_message_match(f, m)) {
548      owl_function_command(owl_global_get_alert_action(&g));
549    }
550
551    /* if it's a zephyr login or logout, update the zbuddylist */
552    if (owl_message_is_type_zephyr(m) && owl_message_is_loginout(m)) {
553      if (owl_message_is_login(m)) {
554        owl_zbuddylist_adduser(owl_global_get_zephyr_buddylist(&g), owl_message_get_sender(m));
555      } else if (owl_message_is_logout(m)) {
556        owl_zbuddylist_deluser(owl_global_get_zephyr_buddylist(&g), owl_message_get_sender(m));
557      } else {
558        owl_function_error("Internal error: received login notice that is neither login nor logout");
559      }
560    }
561  }
562
563  /* let perl know about it */
564  owl_perlconfig_newmsg(m, NULL);
565  /* log the message if we need to */
566  owl_log_message(m);
567
568  return 1;
569}
570
571void owl_process_input(owl_dispatch *d)
572{
573  owl_input j;
574  WINDOW *typwin;
575
576  typwin = owl_global_get_curs_typwin(&g);
577
578  while (1) {
579    j.ch = wgetch(typwin);
580    if (j.ch == ERR) return;
581
582    j.uch = '\0';
583    if (j.ch >= KEY_MIN && j.ch <= KEY_MAX) {
584      /* This is a curses control character. */
585    }
586    else if (j.ch > 0x7f && j.ch < 0xfe) {
587      /* Pull in a full utf-8 character. */
588      int bytes, i;
589      char utf8buf[7];
590      memset(utf8buf, '\0', 7);
591     
592      utf8buf[0] = j.ch;
593     
594      if ((j.ch & 0xc0) && (~j.ch & 0x20)) bytes = 2;
595      else if ((j.ch & 0xe0) && (~j.ch & 0x10)) bytes = 3;
596      else if ((j.ch & 0xf0) && (~j.ch & 0x08)) bytes = 4;
597      else if ((j.ch & 0xf8) && (~j.ch & 0x04)) bytes = 5;
598      else if ((j.ch & 0xfc) && (~j.ch & 0x02)) bytes = 6;
599      else bytes = 1;
600     
601      for (i = 1; i < bytes; i++) {
602        int tmp =  wgetch(typwin);
603        /* If what we got was not a byte, or not a continuation byte */
604        if (tmp > 0xff || !(tmp & 0x80 && ~tmp & 0x40)) {
605          /* ill-formed UTF-8 code unit subsequence, put back the
606             char we just got. */
607          ungetch(tmp);
608          j.ch = ERR;
609          break;
610        }
611        utf8buf[i] = tmp;
612      }
613     
614      if (j.ch != ERR) {
615        if (g_utf8_validate(utf8buf, -1, NULL)) {
616          j.uch = g_utf8_get_char(utf8buf);
617        }
618        else {
619          j.ch = ERR;
620        }
621      }
622    }
623    else if (j.ch <= 0x7f) {
624      j.uch = j.ch;
625    }
626
627    owl_process_input_char(j);
628  }
629}
630
631void sig_handler(int sig, siginfo_t *si, void *data)
632{
633  if (sig==SIGWINCH) {
634    /* we can't inturrupt a malloc here, so it just sets a flag
635     * schedulding a resize for later
636     */
637    owl_function_resize();
638  } else if (sig==SIGPIPE || sig==SIGCHLD) {
639    /* Set a flag and some info that we got the sigpipe
640     * so we can record that we got it and why... */
641    owl_global_set_errsignal(&g, sig, si);
642  } else if (sig==SIGTERM || sig==SIGHUP) {
643    owl_function_quit();
644  }
645}
646
647void sigint_handler(int sig, siginfo_t *si, void *data)
648{
649  owl_global_set_interrupted(&g);
650}
651
652void usage()
653{
654  fprintf(stderr, "Barnowl version %s\n", OWL_VERSION_STRING);
655  fprintf(stderr, "Usage: barnowl [-n] [-d] [-D] [-v] [-h] [-c <configfile>] [-s <confdir>] [-t <ttyname>]\n");
656  fprintf(stderr, "  -n      don't load zephyr subscriptions\n");
657  fprintf(stderr, "  -d      enable debugging\n");
658  fprintf(stderr, "  -D      enable debugging and delete previous debug file\n");
659  fprintf(stderr, "  -v      print the Barnowl version number and exit\n");
660  fprintf(stderr, "  -h      print this help message\n");
661  fprintf(stderr, "  -c      specify an alternate config file\n");
662  fprintf(stderr, "  -s      specify an alternate config dir (default ~/.owl)\n");
663  fprintf(stderr, "  -t      set the tty name\n");
664}
665
666#if OWL_STDERR_REDIR
667
668/* Replaces stderr with a pipe so that we can read from it.
669 * Returns the fd of the pipe from which stderr can be read. */
670int stderr_replace(void)
671{
672  int pipefds[2];
673  if (0 != pipe(pipefds)) {
674    perror("pipe");
675    owl_function_debugmsg("stderr_replace: pipe FAILED\n");
676    return -1;
677  }
678    owl_function_debugmsg("stderr_replace: pipe: %d,%d\n", pipefds[0], pipefds[1]);
679  if (-1 == dup2(pipefds[1], 2 /*stderr*/)) {
680    owl_function_debugmsg("stderr_replace: dup2 FAILED (%s)\n", strerror(errno));
681    perror("dup2");
682    return -1;
683  }
684  return pipefds[0];
685}
686
687/* Sends stderr (read from rfd) messages to the error console */
688void stderr_redirect_handler(owl_dispatch *d)
689{
690  int navail, bread;
691  char buf[4096];
692  int rfd = d->fd;
693  char *err;
694
695  if (rfd<0) return;
696  if (-1 == ioctl(rfd, FIONREAD, &navail)) {
697    return;
698  }
699  /*owl_function_debugmsg("stderr_redirect: navail = %d\n", navail);*/
700  if (navail <= 0) return;
701  if (navail > sizeof(buf)-1) {
702    navail = sizeof(buf)-1;
703  }
704  bread = read(rfd, buf, navail);
705  if (buf[navail-1] != '\0') {
706    buf[navail] = '\0';
707  }
708
709  err = owl_sprintf("[stderr]\n%s", buf);
710
711  owl_function_log_err(err);
712  owl_free(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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