source: owl.c @ 6476c0e

release-1.8release-1.9
Last change on this file since 6476c0e was 6476c0e, checked in by Anders Kaseorg <andersk@mit.edu>, 10 years ago
stderr_redirect_handler: Handle partial or failed reads Signed-off-by: Anders Kaseorg <andersk@mit.edu>
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File size: 18.5 KB
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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} owl_options;
44
45void usage(void)
46{
47  fprintf(stderr, "Barnowl version %s\n", OWL_VERSION_STRING);
48  fprintf(stderr, "Usage: barnowl [-n] [-d] [-D] [-v] [-h] [-c <configfile>] [-s <confdir>] [-t <ttyname>]\n");
49  fprintf(stderr, "  -n,--no-subs        don't load zephyr subscriptions\n");
50  fprintf(stderr, "  -d,--debug          enable debugging\n");
51  fprintf(stderr, "  -v,--version        print the Barnowl version number and exit\n");
52  fprintf(stderr, "  -h,--help           print this help message\n");
53  fprintf(stderr, "  -c,--config-file    specify an alternate config file\n");
54  fprintf(stderr, "  -s,--config-dir     specify an alternate config dir (default ~/.owl)\n");
55  fprintf(stderr, "  -t,--tty            set the tty name\n");
56}
57
58/* TODO: free owl_options after init is done? */
59void owl_parse_options(int argc, char *argv[], owl_options *opts) {
60  static const struct option long_options[] = {
61    { "no-subs",         0, 0, 'n' },
62    { "config-file",     1, 0, 'c' },
63    { "config-dir",      1, 0, 's' },
64    { "tty",             1, 0, 't' },
65    { "debug",           0, 0, 'd' },
66    { "version",         0, 0, 'v' },
67    { "help",            0, 0, 'h' },
68    { NULL, 0, NULL, 0}
69  };
70  char c;
71
72  while((c = getopt_long(argc, argv, "nc:t:s:dDvh",
73                         long_options, NULL)) != -1) {
74    switch(c) {
75    case 'n':
76      opts->load_initial_subs = 0;
77      break;
78    case 'c':
79      opts->configfile = g_strdup(optarg);
80      break;
81    case 's':
82      opts->confdir = g_strdup(optarg);
83      break;
84    case 't':
85      opts->tty = g_strdup(optarg);
86      break;
87    case 'd':
88      opts->debug = 1;
89      break;
90    case 'v':
91      printf("This is barnowl version %s\n", OWL_VERSION_STRING);
92      exit(0);
93    case 'h':
94    default:
95      usage();
96      exit(1);
97    }
98  }
99}
100
101void owl_start_color(void) {
102  start_color();
103#ifdef HAVE_USE_DEFAULT_COLORS
104  use_default_colors();
105#endif
106
107  /* define simple color pairs */
108  if (has_colors() && COLOR_PAIRS>=8) {
109    int bg = COLOR_BLACK;
110#ifdef HAVE_USE_DEFAULT_COLORS
111    bg = -1;
112#endif
113    init_pair(OWL_COLOR_BLACK,   COLOR_BLACK,   bg);
114    init_pair(OWL_COLOR_RED,     COLOR_RED,     bg);
115    init_pair(OWL_COLOR_GREEN,   COLOR_GREEN,   bg);
116    init_pair(OWL_COLOR_YELLOW,  COLOR_YELLOW,  bg);
117    init_pair(OWL_COLOR_BLUE,    COLOR_BLUE,    bg);
118    init_pair(OWL_COLOR_MAGENTA, COLOR_MAGENTA, bg);
119    init_pair(OWL_COLOR_CYAN,    COLOR_CYAN,    bg);
120    init_pair(OWL_COLOR_WHITE,   COLOR_WHITE,   bg);
121  }
122}
123
124void owl_start_curses(void) {
125  struct termios tio;
126  /* save initial terminal settings */
127  tcgetattr(STDIN_FILENO, owl_global_get_startup_tio(&g));
128
129  tcgetattr(STDIN_FILENO, &tio);
130  tio.c_iflag &= ~(ISTRIP|IEXTEN);
131  tio.c_cc[VQUIT] = fpathconf(STDIN_FILENO, _PC_VDISABLE);
132  tio.c_cc[VSUSP] = fpathconf(STDIN_FILENO, _PC_VDISABLE);
133  tio.c_cc[VSTART] = fpathconf(STDIN_FILENO, _PC_VDISABLE);
134  tio.c_cc[VSTOP] = fpathconf(STDIN_FILENO, _PC_VDISABLE);
135  tcsetattr(STDIN_FILENO, TCSAFLUSH, &tio);
136
137  /* screen init */
138  initscr();
139  cbreak();
140  noecho();
141
142  owl_start_color();
143}
144
145void owl_shutdown_curses(void) {
146  endwin();
147  /* restore terminal settings */
148  tcsetattr(STDIN_FILENO, TCSAFLUSH, owl_global_get_startup_tio(&g));
149}
150
151/*
152 * Process a new message passed to us on the message queue from some
153 * protocol. This includes adding it to the message list, updating the
154 * view and scrolling if appropriate, logging it, and so on.
155 *
156 * Either a pointer is kept to the message internally, or it is freed
157 * if unneeded. The caller no longer ``owns'' the message's memory.
158 *
159 * Returns 1 if the message was added to the message list, and 0 if it
160 * was ignored due to user settings or otherwise.
161 */
162static int owl_process_message(owl_message *m) {
163  const owl_filter *f;
164  /* if this message it on the puntlist, nuke it and continue */
165  if (owl_global_message_is_puntable(&g, m)) {
166    owl_message_delete(m);
167    return 0;
168  }
169
170  /*  login or logout that should be ignored? */
171  if (owl_global_is_ignorelogins(&g)
172      && owl_message_is_loginout(m)) {
173    owl_message_delete(m);
174    return 0;
175  }
176
177  if (!owl_global_is_displayoutgoing(&g)
178      && owl_message_is_direction_out(m)) {
179    owl_message_delete(m);
180    return 0;
181  }
182
183  /* add it to the global list */
184  owl_messagelist_append_element(owl_global_get_msglist(&g), m);
185  /* add it to any necessary views; right now there's only the current view */
186  owl_view_consider_message(owl_global_get_current_view(&g), m);
187
188  if(owl_message_is_direction_in(m)) {
189    /* let perl know about it*/
190    owl_perlconfig_getmsg(m, NULL);
191
192    /* do we need to autoreply? */
193    if (owl_global_is_zaway(&g) && !owl_message_get_attribute_value(m, "isauto")) {
194      if (owl_message_is_type_zephyr(m)) {
195        owl_zephyr_zaway(m);
196      } else if (owl_message_is_type_aim(m)) {
197        if (owl_message_is_private(m)) {
198          owl_function_send_aimawymsg(owl_message_get_sender(m), owl_global_get_zaway_msg(&g));
199        }
200      }
201    }
202
203    /* ring the bell if it's a personal */
204    if (!strcmp(owl_global_get_personalbell(&g), "on")) {
205      if (!owl_message_is_loginout(m) &&
206          !owl_message_is_mail(m) &&
207          owl_message_is_personal(m)) {
208        owl_function_beep();
209      }
210    } else if (!strcmp(owl_global_get_personalbell(&g), "off")) {
211      /* do nothing */
212    } else {
213      f=owl_global_get_filter(&g, owl_global_get_personalbell(&g));
214      if (f && owl_filter_message_match(f, m)) {
215        owl_function_beep();
216      }
217    }
218
219    /* if it matches the alert filter, do the alert action */
220    f=owl_global_get_filter(&g, owl_global_get_alert_filter(&g));
221    if (f && owl_filter_message_match(f, m)) {
222      owl_function_command_norv(owl_global_get_alert_action(&g));
223    }
224
225    /* if it's a zephyr login or logout, update the zbuddylist */
226    if (owl_message_is_type_zephyr(m) && owl_message_is_loginout(m)) {
227      if (owl_message_is_login(m)) {
228        owl_zbuddylist_adduser(owl_global_get_zephyr_buddylist(&g), owl_message_get_sender(m));
229      } else if (owl_message_is_logout(m)) {
230        owl_zbuddylist_deluser(owl_global_get_zephyr_buddylist(&g), owl_message_get_sender(m));
231      } else {
232        owl_function_error("Internal error: received login notice that is neither login nor logout");
233      }
234    }
235  }
236
237  /* let perl know about it */
238  owl_perlconfig_newmsg(m, NULL);
239  /* log the message if we need to */
240  owl_log_message(m);
241  /* redraw the sepbar; TODO: don't violate layering */
242  owl_global_sepbar_dirty(&g);
243
244  return 1;
245}
246
247static gboolean owl_process_messages_prepare(GSource *source, int *timeout) {
248  *timeout = -1;
249  return owl_global_messagequeue_pending(&g);
250}
251
252static gboolean owl_process_messages_check(GSource *source) {
253  return owl_global_messagequeue_pending(&g);
254}
255
256/*
257 * Process any new messages we have waiting in the message queue.
258 */
259static gboolean owl_process_messages_dispatch(GSource *source, GSourceFunc callback, gpointer user_data) {
260  int newmsgs=0;
261  int followlast = owl_global_should_followlast(&g);
262  owl_message *m;
263
264  /* Grab incoming messages. */
265  while (owl_global_messagequeue_pending(&g)) {
266    m = owl_global_messagequeue_popmsg(&g);
267    if (owl_process_message(m))
268      newmsgs = 1;
269  }
270
271  if (newmsgs) {
272    /* follow the last message if we're supposed to */
273    if (followlast)
274      owl_function_lastmsg_noredisplay();
275
276    /* do the newmsgproc thing */
277    owl_function_do_newmsgproc();
278
279    /* redisplay if necessary */
280    /* this should be optimized to not run if the new messages won't be displayed */
281    owl_mainwin_redisplay(owl_global_get_mainwin(&g));
282  }
283  return TRUE;
284}
285
286static GSourceFuncs owl_process_messages_funcs = {
287  owl_process_messages_prepare,
288  owl_process_messages_check,
289  owl_process_messages_dispatch,
290  NULL
291};
292
293void owl_process_input_char(owl_input j)
294{
295  int ret;
296
297  owl_global_set_lastinputtime(&g, time(NULL));
298  ret = owl_keyhandler_process(owl_global_get_keyhandler(&g), j);
299  if (ret!=0 && ret!=1) {
300    owl_function_makemsg("Unable to handle keypress");
301  }
302}
303
304void owl_process_input(const owl_io_dispatch *d, void *data)
305{
306  owl_input j;
307
308  while (1) {
309    j.ch = wgetch(g.input_pad);
310    if (j.ch == ERR) return;
311
312    j.uch = '\0';
313    if (j.ch >= KEY_MIN && j.ch <= KEY_MAX) {
314      /* This is a curses control character. */
315    }
316    else if (j.ch > 0x7f && j.ch < 0xfe) {
317      /* Pull in a full utf-8 character. */
318      int bytes, i;
319      char utf8buf[7];
320      memset(utf8buf, '\0', 7);
321     
322      utf8buf[0] = j.ch;
323     
324      if ((j.ch & 0xc0) && (~j.ch & 0x20)) bytes = 2;
325      else if ((j.ch & 0xe0) && (~j.ch & 0x10)) bytes = 3;
326      else if ((j.ch & 0xf0) && (~j.ch & 0x08)) bytes = 4;
327      else if ((j.ch & 0xf8) && (~j.ch & 0x04)) bytes = 5;
328      else if ((j.ch & 0xfc) && (~j.ch & 0x02)) bytes = 6;
329      else bytes = 1;
330     
331      for (i = 1; i < bytes; i++) {
332        int tmp = wgetch(g.input_pad);
333        /* If what we got was not a byte, or not a continuation byte */
334        if (tmp > 0xff || !(tmp & 0x80 && ~tmp & 0x40)) {
335          /* ill-formed UTF-8 code unit subsequence, put back the
336             char we just got. */
337          ungetch(tmp);
338          j.ch = ERR;
339          break;
340        }
341        utf8buf[i] = tmp;
342      }
343     
344      if (j.ch != ERR) {
345        if (g_utf8_validate(utf8buf, -1, NULL)) {
346          j.uch = g_utf8_get_char(utf8buf);
347        }
348        else {
349          j.ch = ERR;
350        }
351      }
352    }
353    else if (j.ch <= 0x7f) {
354      j.uch = j.ch;
355    }
356
357    owl_process_input_char(j);
358  }
359}
360
361static void sig_handler_main_thread(void *data) {
362  int sig = GPOINTER_TO_INT(data);
363
364  owl_function_debugmsg("Got signal %d", sig);
365  if (sig == SIGWINCH) {
366    owl_function_resize();
367  } else if (sig == SIGTERM || sig == SIGHUP) {
368    owl_function_quit();
369  } else if (sig == SIGINT && owl_global_take_interrupt(&g)) {
370    owl_input in;
371    in.ch = in.uch = owl_global_get_startup_tio(&g)->c_cc[VINTR];
372    owl_process_input_char(in);
373  }
374}
375
376static void sig_handler(const siginfo_t *siginfo, void *data) {
377  /* If it was an interrupt, set a flag so we can handle it earlier if
378   * needbe. sig_handler_main_thread will check the flag to make sure
379   * no one else took it. */
380  if (siginfo->si_signo == SIGINT) {
381    owl_global_add_interrupt(&g);
382  }
383  /* Send a message to the main thread. */
384  owl_select_post_task(sig_handler_main_thread,
385                       GINT_TO_POINTER(siginfo->si_signo), NULL);
386}
387
388#define CHECK_RESULT(s, syscall) \
389  G_STMT_START {                 \
390    if ((syscall) != 0) {        \
391      perror((s));               \
392      exit(1);                   \
393    }                            \
394  } G_STMT_END
395
396void owl_register_signal_handlers(void) {
397  struct sigaction sig_ignore = { .sa_handler = SIG_IGN };
398  struct sigaction sig_default = { .sa_handler = SIG_DFL };
399  sigset_t sigset;
400  int ret, i;
401  const int signals[] = { SIGABRT, SIGBUS, SIGCHLD, SIGFPE, SIGHUP, SIGILL,
402                          SIGINT, SIGQUIT, SIGSEGV, SIGTERM, SIGWINCH };
403
404  /* Sanitize our signals; the mask and dispositions from our parent
405   * aren't really useful. Signal list taken from equivalent code in
406   * Chromium. */
407  CHECK_RESULT("sigemptyset", sigemptyset(&sigset));
408  if ((ret = pthread_sigmask(SIG_SETMASK, &sigset, NULL)) != 0) {
409    errno = ret;
410    perror("pthread_sigmask");
411  }
412  for (i = 0; i < G_N_ELEMENTS(signals); i++) {
413    CHECK_RESULT("sigaction", sigaction(signals[i], &sig_default, NULL));
414  }
415
416  /* Turn off SIGPIPE; we check the return value of write. */
417  CHECK_RESULT("sigaction", sigaction(SIGPIPE, &sig_ignore, NULL));
418
419  /* Register some signals with the signal thread. */
420  CHECK_RESULT("sigaddset", sigaddset(&sigset, SIGWINCH));
421  CHECK_RESULT("sigaddset", sigaddset(&sigset, SIGTERM));
422  CHECK_RESULT("sigaddset", sigaddset(&sigset, SIGHUP));
423  CHECK_RESULT("sigaddset", sigaddset(&sigset, SIGINT));
424  owl_signal_init(&sigset, sig_handler, NULL);
425}
426
427#if OWL_STDERR_REDIR
428
429/* Replaces stderr with a pipe so that we can read from it.
430 * Returns the fd of the pipe from which stderr can be read. */
431int stderr_replace(void)
432{
433  int pipefds[2];
434  if (0 != pipe(pipefds)) {
435    perror("pipe");
436    owl_function_debugmsg("stderr_replace: pipe FAILED\n");
437    return -1;
438  }
439    owl_function_debugmsg("stderr_replace: pipe: %d,%d\n", pipefds[0], pipefds[1]);
440  if (-1 == dup2(pipefds[1], 2 /*stderr*/)) {
441    owl_function_debugmsg("stderr_replace: dup2 FAILED (%s)\n", strerror(errno));
442    perror("dup2");
443    return -1;
444  }
445  return pipefds[0];
446}
447
448/* Sends stderr (read from rfd) messages to the error console */
449void stderr_redirect_handler(const owl_io_dispatch *d, void *data)
450{
451  int navail, bread;
452  char buf[4096];
453  int rfd = d->fd;
454  char *err;
455
456  if (rfd<0) return;
457  if (-1 == ioctl(rfd, FIONREAD, &navail)) {
458    return;
459  }
460  /*owl_function_debugmsg("stderr_redirect: navail = %d\n", navail);*/
461  if (navail <= 0) return;
462  if (navail > sizeof(buf)-1) {
463    navail = sizeof(buf)-1;
464  }
465  bread = read(rfd, buf, navail);
466  if (bread == -1)
467    return;
468
469  err = g_strdup_printf("[stderr]\n%.*s", bread, buf);
470
471  owl_function_log_err(err);
472  g_free(err);
473}
474
475#endif /* OWL_STDERR_REDIR */
476
477int main(int argc, char **argv, char **env)
478{
479  int argc_copy;
480  char **argv_copy;
481  char *perlout, *perlerr;
482  const owl_style *s;
483  const char *dir;
484  owl_options opts;
485  GSource *source;
486
487  if (!GLIB_CHECK_VERSION (2, 12, 0))
488    g_error ("GLib version 2.12.0 or above is needed.");
489
490  argc_copy = argc;
491  argv_copy = g_strdupv(argv);
492
493  setlocale(LC_ALL, "");
494
495  memset(&opts, 0, sizeof opts);
496  opts.load_initial_subs = 1;
497  owl_parse_options(argc, argv, &opts);
498  g.load_initial_subs = opts.load_initial_subs;
499
500  owl_start_curses();
501
502  /* owl global init */
503  owl_global_init(&g);
504  if (opts.debug) owl_global_set_debug_on(&g);
505  if (opts.confdir) owl_global_set_confdir(&g, opts.confdir);
506  owl_function_debugmsg("startup: first available debugging message");
507  owl_global_set_startupargs(&g, argc_copy, argv_copy);
508  g_strfreev(argv_copy);
509  owl_global_set_haveaim(&g);
510
511  owl_register_signal_handlers();
512
513  /* register STDIN dispatch; throw away return, we won't need it */
514  owl_select_add_io_dispatch(STDIN_FILENO, OWL_IO_READ, &owl_process_input, NULL, NULL);
515  owl_zephyr_initialize();
516
517#if OWL_STDERR_REDIR
518  /* Do this only after we've started curses up... */
519  owl_function_debugmsg("startup: doing stderr redirection");
520  owl_select_add_io_dispatch(stderr_replace(), OWL_IO_READ, &stderr_redirect_handler, NULL, NULL);
521#endif
522
523  /* create the owl directory, in case it does not exist */
524  owl_function_debugmsg("startup: creating owl directory, if not present");
525  dir=owl_global_get_confdir(&g);
526  mkdir(dir, S_IRWXU);
527
528  /* set the tty, either from the command line, or by figuring it out */
529  owl_function_debugmsg("startup: setting tty name");
530  if (opts.tty) {
531    owl_global_set_tty(&g, opts.tty);
532  } else {
533    char *tty = owl_util_get_default_tty();
534    owl_global_set_tty(&g, tty);
535    g_free(tty);
536  }
537
538  /* Initialize perl */
539  owl_function_debugmsg("startup: processing config file");
540
541  owl_global_pop_context(&g);
542  owl_global_push_context(&g, OWL_CTX_READCONFIG, NULL, NULL, NULL);
543
544  perlerr=owl_perlconfig_initperl(opts.configfile, &argc, &argv, &env);
545  if (perlerr) {
546    endwin();
547    fprintf(stderr, "Internal perl error: %s\n", perlerr);
548    fflush(stderr);
549    printf("Internal perl error: %s\n", perlerr);
550    fflush(stdout);
551    exit(1);
552  }
553
554  owl_global_complete_setup(&g);
555
556  owl_global_setup_default_filters(&g);
557
558  /* set the current view */
559  owl_function_debugmsg("startup: setting the current view");
560  owl_view_create(owl_global_get_current_view(&g), "main",
561                  owl_global_get_filter(&g, "all"),
562                  owl_global_get_style_by_name(&g, "default"));
563
564  /* AIM init */
565  owl_function_debugmsg("startup: doing AIM initialization");
566  owl_aim_init();
567
568  /* execute the startup function in the configfile */
569  owl_function_debugmsg("startup: executing perl startup, if applicable");
570  perlout = owl_perlconfig_execute("BarnOwl::Hooks::_startup();");
571  g_free(perlout);
572
573  /* welcome message */
574  owl_function_debugmsg("startup: creating splash message");
575  owl_function_adminmsg("",
576    "-----------------------------------------------------------------------\n"
577    "Welcome to barnowl version " OWL_VERSION_STRING ".\n"
578    "To see a quick introduction, type ':show quickstart'.                  \n"
579    "Press 'h' for on-line help.                                            \n"
580    "                                                                       \n"
581    "BarnOwl is free software. Type ':show license' for more                \n"
582    "information.                                                     ^ ^   \n"
583    "                                                                 OvO   \n"
584    "Please report any bugs or suggestions to bug-barnowl@mit.edu    (   )  \n"
585    "-----------------------------------------------------------------m-m---\n"
586  );
587
588  /* process the startup file */
589  owl_function_debugmsg("startup: processing startup file");
590  owl_function_source(NULL);
591
592  owl_function_debugmsg("startup: set style for the view: %s", owl_global_get_default_style(&g));
593  s = owl_global_get_style_by_name(&g, owl_global_get_default_style(&g));
594  if(s)
595      owl_view_set_style(owl_global_get_current_view(&g), s);
596  else
597      owl_function_error("No such style: %s", owl_global_get_default_style(&g));
598
599  owl_function_debugmsg("startup: setting context interactive");
600
601  owl_global_pop_context(&g);
602  owl_global_push_context(&g, OWL_CTX_INTERACTIVE|OWL_CTX_RECV, NULL, "recv", NULL);
603
604  source = owl_window_redraw_source_new();
605  g_source_attach(source, NULL);
606  g_source_unref(source);
607
608  source = g_source_new(&owl_process_messages_funcs, sizeof(GSource));
609  g_source_attach(source, NULL);
610  g_source_unref(source);
611
612  owl_function_debugmsg("startup: entering main loop");
613  owl_select_run_loop();
614
615  /* Shut down everything. */
616  owl_zephyr_shutdown();
617  owl_signal_shutdown();
618  owl_shutdown_curses();
619  return 0;
620}
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