source: owl.c @ 6bd485e

release-1.8release-1.9
Last change on this file since 6bd485e was 6bd485e, checked in by David Benjamin <davidben@mit.edu>, 10 years ago
Reset signal dispositions and mask, in case our parent was lame Also check return values more carefully.
  • Property mode set to 100644
File size: 18.7 KB
Line 
1/*  Copyright (c) 2006-2011 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
35owl_global g;
36
37typedef struct _owl_options {
38  bool load_initial_subs;
39  char *configfile;
40  char *tty;
41  char *confdir;
42  bool debug;
43  bool rm_debug;
44} owl_options;
45
46void usage(void)
47{
48  fprintf(stderr, "Barnowl version %s\n", OWL_VERSION_STRING);
49  fprintf(stderr, "Usage: barnowl [-n] [-d] [-D] [-v] [-h] [-c <configfile>] [-s <confdir>] [-t <ttyname>]\n");
50  fprintf(stderr, "  -n,--no-subs        don't load zephyr subscriptions\n");
51  fprintf(stderr, "  -d,--debug          enable debugging\n");
52  fprintf(stderr, "  -D,--remove-debug   enable debugging and delete previous debug file\n");
53  fprintf(stderr, "  -v,--version        print the Barnowl version number and exit\n");
54  fprintf(stderr, "  -h,--help           print this help message\n");
55  fprintf(stderr, "  -c,--config-file    specify an alternate config file\n");
56  fprintf(stderr, "  -s,--config-dir     specify an alternate config dir (default ~/.owl)\n");
57  fprintf(stderr, "  -t,--tty            set the tty name\n");
58}
59
60/* TODO: free owl_options after init is done? */
61void owl_parse_options(int argc, char *argv[], owl_options *opts) {
62  static const struct option long_options[] = {
63    { "no-subs",         0, 0, 'n' },
64    { "config-file",     1, 0, 'c' },
65    { "config-dir",      1, 0, 's' },
66    { "tty",             1, 0, 't' },
67    { "debug",           0, 0, 'd' },
68    { "remove-debug",    0, 0, 'D' },
69    { "version",         0, 0, 'v' },
70    { "help",            0, 0, 'h' },
71    { NULL, 0, NULL, 0}
72  };
73  char c;
74
75  while((c = getopt_long(argc, argv, "nc:t:s:dDvh",
76                         long_options, NULL)) != -1) {
77    switch(c) {
78    case 'n':
79      opts->load_initial_subs = 0;
80      break;
81    case 'c':
82      opts->configfile = g_strdup(optarg);
83      break;
84    case 's':
85      opts->confdir = g_strdup(optarg);
86      break;
87    case 't':
88      opts->tty = g_strdup(optarg);
89      break;
90    case 'D':
91      opts->rm_debug = 1;
92      /* fallthrough */
93    case 'd':
94      opts->debug = 1;
95      break;
96    case 'v':
97      printf("This is barnowl version %s\n", OWL_VERSION_STRING);
98      exit(0);
99    case 'h':
100    default:
101      usage();
102      exit(1);
103    }
104  }
105}
106
107void owl_start_color(void) {
108  start_color();
109#ifdef HAVE_USE_DEFAULT_COLORS
110  use_default_colors();
111#endif
112
113  /* define simple color pairs */
114  if (has_colors() && COLOR_PAIRS>=8) {
115    int bg = COLOR_BLACK;
116#ifdef HAVE_USE_DEFAULT_COLORS
117    bg = -1;
118#endif
119    init_pair(OWL_COLOR_BLACK,   COLOR_BLACK,   bg);
120    init_pair(OWL_COLOR_RED,     COLOR_RED,     bg);
121    init_pair(OWL_COLOR_GREEN,   COLOR_GREEN,   bg);
122    init_pair(OWL_COLOR_YELLOW,  COLOR_YELLOW,  bg);
123    init_pair(OWL_COLOR_BLUE,    COLOR_BLUE,    bg);
124    init_pair(OWL_COLOR_MAGENTA, COLOR_MAGENTA, bg);
125    init_pair(OWL_COLOR_CYAN,    COLOR_CYAN,    bg);
126    init_pair(OWL_COLOR_WHITE,   COLOR_WHITE,   bg);
127  }
128}
129
130void owl_start_curses(void) {
131  struct termios tio;
132  /* save initial terminal settings */
133  tcgetattr(STDIN_FILENO, owl_global_get_startup_tio(&g));
134
135  tcgetattr(STDIN_FILENO, &tio);
136  tio.c_iflag &= ~(ISTRIP|IEXTEN);
137  tio.c_cc[VQUIT] = fpathconf(STDIN_FILENO, _PC_VDISABLE);
138  tio.c_cc[VSUSP] = fpathconf(STDIN_FILENO, _PC_VDISABLE);
139  tio.c_cc[VSTART] = fpathconf(STDIN_FILENO, _PC_VDISABLE);
140  tio.c_cc[VSTOP] = fpathconf(STDIN_FILENO, _PC_VDISABLE);
141  tcsetattr(STDIN_FILENO, TCSAFLUSH, &tio);
142
143  /* screen init */
144  initscr();
145  cbreak();
146  noecho();
147
148  owl_start_color();
149}
150
151void owl_shutdown_curses(void) {
152  endwin();
153  /* restore terminal settings */
154  tcsetattr(STDIN_FILENO, TCSAFLUSH, owl_global_get_startup_tio(&g));
155}
156
157/*
158 * Process a new message passed to us on the message queue from some
159 * protocol. This includes adding it to the message list, updating the
160 * view and scrolling if appropriate, logging it, and so on.
161 *
162 * Either a pointer is kept to the message internally, or it is freed
163 * if unneeded. The caller no longer ``owns'' the message's memory.
164 *
165 * Returns 1 if the message was added to the message list, and 0 if it
166 * was ignored due to user settings or otherwise.
167 */
168static int owl_process_message(owl_message *m) {
169  const owl_filter *f;
170  /* if this message it on the puntlist, nuke it and continue */
171  if (owl_global_message_is_puntable(&g, m)) {
172    owl_message_delete(m);
173    return 0;
174  }
175
176  /*  login or logout that should be ignored? */
177  if (owl_global_is_ignorelogins(&g)
178      && owl_message_is_loginout(m)) {
179    owl_message_delete(m);
180    return 0;
181  }
182
183  if (!owl_global_is_displayoutgoing(&g)
184      && owl_message_is_direction_out(m)) {
185    owl_message_delete(m);
186    return 0;
187  }
188
189  /* add it to the global list */
190  owl_messagelist_append_element(owl_global_get_msglist(&g), m);
191  /* add it to any necessary views; right now there's only the current view */
192  owl_view_consider_message(owl_global_get_current_view(&g), m);
193
194  if(owl_message_is_direction_in(m)) {
195    /* let perl know about it*/
196    owl_perlconfig_getmsg(m, NULL);
197
198    /* do we need to autoreply? */
199    if (owl_global_is_zaway(&g) && !owl_message_get_attribute_value(m, "isauto")) {
200      if (owl_message_is_type_zephyr(m)) {
201        owl_zephyr_zaway(m);
202      } else if (owl_message_is_type_aim(m)) {
203        if (owl_message_is_private(m)) {
204          owl_function_send_aimawymsg(owl_message_get_sender(m), owl_global_get_zaway_msg(&g));
205        }
206      }
207    }
208
209    /* ring the bell if it's a personal */
210    if (!strcmp(owl_global_get_personalbell(&g), "on")) {
211      if (!owl_message_is_loginout(m) &&
212          !owl_message_is_mail(m) &&
213          owl_message_is_personal(m)) {
214        owl_function_beep();
215      }
216    } else if (!strcmp(owl_global_get_personalbell(&g), "off")) {
217      /* do nothing */
218    } else {
219      f=owl_global_get_filter(&g, owl_global_get_personalbell(&g));
220      if (f && owl_filter_message_match(f, m)) {
221        owl_function_beep();
222      }
223    }
224
225    /* if it matches the alert filter, do the alert action */
226    f=owl_global_get_filter(&g, owl_global_get_alert_filter(&g));
227    if (f && owl_filter_message_match(f, m)) {
228      owl_function_command_norv(owl_global_get_alert_action(&g));
229    }
230
231    /* if it's a zephyr login or logout, update the zbuddylist */
232    if (owl_message_is_type_zephyr(m) && owl_message_is_loginout(m)) {
233      if (owl_message_is_login(m)) {
234        owl_zbuddylist_adduser(owl_global_get_zephyr_buddylist(&g), owl_message_get_sender(m));
235      } else if (owl_message_is_logout(m)) {
236        owl_zbuddylist_deluser(owl_global_get_zephyr_buddylist(&g), owl_message_get_sender(m));
237      } else {
238        owl_function_error("Internal error: received login notice that is neither login nor logout");
239      }
240    }
241  }
242
243  /* let perl know about it */
244  owl_perlconfig_newmsg(m, NULL);
245  /* log the message if we need to */
246  owl_log_message(m);
247  /* redraw the sepbar; TODO: don't violate layering */
248  owl_global_sepbar_dirty(&g);
249
250  return 1;
251}
252
253static gboolean owl_process_messages_prepare(GSource *source, int *timeout) {
254  *timeout = -1;
255  return owl_global_messagequeue_pending(&g);
256}
257
258static gboolean owl_process_messages_check(GSource *source) {
259  return owl_global_messagequeue_pending(&g);
260}
261
262/*
263 * Process any new messages we have waiting in the message queue.
264 */
265static gboolean owl_process_messages_dispatch(GSource *source, GSourceFunc callback, gpointer user_data) {
266  int newmsgs=0;
267  int followlast = owl_global_should_followlast(&g);
268  owl_message *m;
269
270  /* Grab incoming messages. */
271  while (owl_global_messagequeue_pending(&g)) {
272    m = owl_global_messagequeue_popmsg(&g);
273    if (owl_process_message(m))
274      newmsgs = 1;
275  }
276
277  if (newmsgs) {
278    /* follow the last message if we're supposed to */
279    if (followlast)
280      owl_function_lastmsg_noredisplay();
281
282    /* do the newmsgproc thing */
283    owl_function_do_newmsgproc();
284
285    /* redisplay if necessary */
286    /* this should be optimized to not run if the new messages won't be displayed */
287    owl_mainwin_redisplay(owl_global_get_mainwin(&g));
288  }
289  return TRUE;
290}
291
292static GSourceFuncs owl_process_messages_funcs = {
293  owl_process_messages_prepare,
294  owl_process_messages_check,
295  owl_process_messages_dispatch,
296  NULL
297};
298
299void owl_process_input(const owl_io_dispatch *d, void *data)
300{
301  owl_input j;
302
303  while (1) {
304    j.ch = wgetch(g.input_pad);
305    if (j.ch == ERR) return;
306
307    j.uch = '\0';
308    if (j.ch >= KEY_MIN && j.ch <= KEY_MAX) {
309      /* This is a curses control character. */
310    }
311    else if (j.ch > 0x7f && j.ch < 0xfe) {
312      /* Pull in a full utf-8 character. */
313      int bytes, i;
314      char utf8buf[7];
315      memset(utf8buf, '\0', 7);
316     
317      utf8buf[0] = j.ch;
318     
319      if ((j.ch & 0xc0) && (~j.ch & 0x20)) bytes = 2;
320      else if ((j.ch & 0xe0) && (~j.ch & 0x10)) bytes = 3;
321      else if ((j.ch & 0xf0) && (~j.ch & 0x08)) bytes = 4;
322      else if ((j.ch & 0xf8) && (~j.ch & 0x04)) bytes = 5;
323      else if ((j.ch & 0xfc) && (~j.ch & 0x02)) bytes = 6;
324      else bytes = 1;
325     
326      for (i = 1; i < bytes; i++) {
327        int tmp = wgetch(g.input_pad);
328        /* If what we got was not a byte, or not a continuation byte */
329        if (tmp > 0xff || !(tmp & 0x80 && ~tmp & 0x40)) {
330          /* ill-formed UTF-8 code unit subsequence, put back the
331             char we just got. */
332          ungetch(tmp);
333          j.ch = ERR;
334          break;
335        }
336        utf8buf[i] = tmp;
337      }
338     
339      if (j.ch != ERR) {
340        if (g_utf8_validate(utf8buf, -1, NULL)) {
341          j.uch = g_utf8_get_char(utf8buf);
342        }
343        else {
344          j.ch = ERR;
345        }
346      }
347    }
348    else if (j.ch <= 0x7f) {
349      j.uch = j.ch;
350    }
351
352    owl_process_input_char(j);
353  }
354}
355
356static gboolean sig_handler_main_thread(gpointer data) {
357  int sig = GPOINTER_TO_INT(data);
358
359  owl_function_debugmsg("Got signal %d", sig);
360  if (sig == SIGWINCH) {
361    owl_function_resize();
362  } else if (sig == SIGTERM || sig == SIGHUP) {
363    owl_function_quit();
364  } else if (sig == SIGINT && owl_global_take_interrupt(&g)) {
365    owl_input in;
366    in.ch = in.uch = owl_global_get_startup_tio(&g)->c_cc[VINTR];
367    owl_process_input_char(in);
368  }
369  return FALSE;
370}
371
372static void sig_handler(int sig, void *data) {
373  GMainContext *context = data;
374  GSource *source;
375
376  /* If it was an interrupt, set a flag so we can handle it earlier if
377   * needbe. sig_handler_main_thread will check the flag to make sure
378   * no one else took it. */
379  if (sig == SIGINT) {
380    owl_global_add_interrupt(&g);
381  }
382  /* Send a message to the main thread. */
383  source = g_idle_source_new();
384  g_source_set_priority(source, G_PRIORITY_DEFAULT);
385  g_source_set_callback(source, sig_handler_main_thread,
386                        GINT_TO_POINTER(sig), NULL);
387  g_source_attach(source, context);
388  g_source_unref(source);
389}
390
391#define CHECK_RESULT(s, syscall) \
392  G_STMT_START {                 \
393    if ((syscall) != 0) {        \
394      perror((s));               \
395      exit(1);                   \
396    }                            \
397  } G_STMT_END
398
399void owl_register_signal_handlers(void) {
400  struct sigaction sig_ignore = { .sa_handler = SIG_IGN };
401  struct sigaction sig_default = { .sa_handler = SIG_DFL };
402  sigset_t sigset;
403  int ret, i;
404  const int signals[] = { SIGABRT, SIGBUS, SIGCHLD, SIGFPE, SIGHUP, SIGILL,
405                          SIGINT, SIGQUIT, SIGSEGV, SIGTERM, SIGWINCH };
406
407  /* Sanitize our signals; the mask and dispositions from our parent
408   * aren't really useful. Signal list taken from equivalent code in
409   * Chromium. */
410  CHECK_RESULT("sigemptyset", sigemptyset(&sigset));
411  if ((ret = pthread_sigmask(SIG_SETMASK, &sigset, NULL)) != 0) {
412    errno = ret;
413    perror("pthread_sigmask");
414  }
415  for (i = 0; i < G_N_ELEMENTS(signals); i++) {
416    CHECK_RESULT("sigaction", sigaction(signals[i], &sig_default, NULL));
417  }
418
419  /* Turn off SIGPIPE; we check the return value of write. */
420  CHECK_RESULT("sigaction", sigaction(SIGPIPE, &sig_ignore, NULL));
421
422  /* Register some signals with the signal thread. */
423  CHECK_RESULT("sigaddset", sigaddset(&sigset, SIGWINCH));
424  CHECK_RESULT("sigaddset", sigaddset(&sigset, SIGTERM));
425  CHECK_RESULT("sigaddset", sigaddset(&sigset, SIGHUP));
426  CHECK_RESULT("sigaddset", sigaddset(&sigset, SIGINT));
427  owl_signal_init(&sigset, sig_handler, g_main_context_default());
428}
429
430#if OWL_STDERR_REDIR
431
432/* Replaces stderr with a pipe so that we can read from it.
433 * Returns the fd of the pipe from which stderr can be read. */
434int stderr_replace(void)
435{
436  int pipefds[2];
437  if (0 != pipe(pipefds)) {
438    perror("pipe");
439    owl_function_debugmsg("stderr_replace: pipe FAILED\n");
440    return -1;
441  }
442    owl_function_debugmsg("stderr_replace: pipe: %d,%d\n", pipefds[0], pipefds[1]);
443  if (-1 == dup2(pipefds[1], 2 /*stderr*/)) {
444    owl_function_debugmsg("stderr_replace: dup2 FAILED (%s)\n", strerror(errno));
445    perror("dup2");
446    return -1;
447  }
448  return pipefds[0];
449}
450
451/* Sends stderr (read from rfd) messages to the error console */
452void stderr_redirect_handler(const owl_io_dispatch *d, void *data)
453{
454  int navail, bread;
455  char buf[4096];
456  int rfd = d->fd;
457  char *err;
458
459  if (rfd<0) return;
460  if (-1 == ioctl(rfd, FIONREAD, &navail)) {
461    return;
462  }
463  /*owl_function_debugmsg("stderr_redirect: navail = %d\n", navail);*/
464  if (navail <= 0) return;
465  if (navail > sizeof(buf)-1) {
466    navail = sizeof(buf)-1;
467  }
468  bread = read(rfd, buf, navail);
469  if (buf[navail-1] != '\0') {
470    buf[navail] = '\0';
471  }
472
473  err = g_strdup_printf("[stderr]\n%s", buf);
474
475  owl_function_log_err(err);
476  g_free(err);
477}
478
479#endif /* OWL_STDERR_REDIR */
480
481int main(int argc, char **argv, char **env)
482{
483  int argc_copy;
484  char **argv_copy;
485  char *perlout, *perlerr;
486  const owl_style *s;
487  const char *dir;
488  owl_options opts;
489  GSource *source;
490
491  if (!GLIB_CHECK_VERSION (2, 12, 0))
492    g_error ("GLib version 2.12.0 or above is needed.");
493
494  argc_copy = argc;
495  argv_copy = g_strdupv(argv);
496
497  setlocale(LC_ALL, "");
498
499  memset(&opts, 0, sizeof opts);
500  opts.load_initial_subs = 1;
501  owl_parse_options(argc, argv, &opts);
502  g.load_initial_subs = opts.load_initial_subs;
503
504  owl_start_curses();
505
506  /* owl global init */
507  owl_global_init(&g);
508  if (opts.rm_debug) unlink(OWL_DEBUG_FILE);
509  if (opts.debug) owl_global_set_debug_on(&g);
510  if (opts.confdir) owl_global_set_confdir(&g, opts.confdir);
511  owl_function_debugmsg("startup: first available debugging message");
512  owl_global_set_startupargs(&g, argc_copy, argv_copy);
513  g_strfreev(argv_copy);
514  owl_global_set_haveaim(&g);
515
516  owl_register_signal_handlers();
517
518  /* register STDIN dispatch; throw away return, we won't need it */
519  owl_select_add_io_dispatch(STDIN_FILENO, OWL_IO_READ, &owl_process_input, NULL, NULL);
520  owl_zephyr_initialize();
521
522#if OWL_STDERR_REDIR
523  /* Do this only after we've started curses up... */
524  owl_function_debugmsg("startup: doing stderr redirection");
525  owl_select_add_io_dispatch(stderr_replace(), OWL_IO_READ, &stderr_redirect_handler, NULL, NULL);
526#endif
527
528  /* create the owl directory, in case it does not exist */
529  owl_function_debugmsg("startup: creating owl directory, if not present");
530  dir=owl_global_get_confdir(&g);
531  mkdir(dir, S_IRWXU);
532
533  /* set the tty, either from the command line, or by figuring it out */
534  owl_function_debugmsg("startup: setting tty name");
535  if (opts.tty) {
536    owl_global_set_tty(&g, opts.tty);
537  } else {
538    char *tty = owl_util_get_default_tty();
539    owl_global_set_tty(&g, tty);
540    g_free(tty);
541  }
542
543  /* Initialize perl */
544  owl_function_debugmsg("startup: processing config file");
545
546  owl_global_pop_context(&g);
547  owl_global_push_context(&g, OWL_CTX_READCONFIG, NULL, NULL, NULL);
548
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_global_setup_default_filters(&g);
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) g_free(perlout);
577
578  /* welcome message */
579  owl_function_debugmsg("startup: creating splash message");
580  owl_function_adminmsg("",
581    "-----------------------------------------------------------------------\n"
582    "Welcome to barnowl version " OWL_VERSION_STRING ".\n"
583    "To see a quick introduction, type ':show quickstart'.                  \n"
584    "Press 'h' for on-line help.                                            \n"
585    "                                                                       \n"
586    "BarnOwl is free software. Type ':show license' for more                \n"
587    "information.                                                     ^ ^   \n"
588    "                                                                 OvO   \n"
589    "Please report any bugs or suggestions to bug-barnowl@mit.edu    (   )  \n"
590    "-----------------------------------------------------------------m-m---\n"
591  );
592
593  /* process the startup file */
594  owl_function_debugmsg("startup: processing startup file");
595  owl_function_source(NULL);
596
597  owl_function_debugmsg("startup: set style for the view: %s", owl_global_get_default_style(&g));
598  s = owl_global_get_style_by_name(&g, owl_global_get_default_style(&g));
599  if(s)
600      owl_view_set_style(owl_global_get_current_view(&g), s);
601  else
602      owl_function_error("No such style: %s", owl_global_get_default_style(&g));
603
604  owl_function_debugmsg("startup: setting context interactive");
605
606  owl_global_pop_context(&g);
607  owl_global_push_context(&g, OWL_CTX_INTERACTIVE|OWL_CTX_RECV, NULL, "recv", NULL);
608
609  source = owl_window_redraw_source_new();
610  g_source_attach(source, NULL);
611  g_source_unref(source);
612
613  source = g_source_new(&owl_process_messages_funcs, sizeof(GSource));
614  g_source_attach(source, NULL);
615  g_source_unref(source);
616
617  owl_function_debugmsg("startup: entering main loop");
618  owl_select_run_loop();
619
620  /* Shut down everything. */
621  owl_zephyr_shutdown();
622  owl_shutdown_curses();
623  return 0;
624}
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