src/crash.c

   1 /*
   2  * Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 2002-2012 by the Claws Mail Team
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #       include <config.h>
  22 #endif
  23
  24 #ifdef CRASH_DIALOG
  25
  26 #include "defs.h"
  27
  28 #include <glib.h>
  29 #include <glib/gi18n.h>
  30 #include <gtk/gtk.h>
  31 #include <stdio.h>
  32 #include <stdlib.h>
  33 #include <signal.h>
  34 #include <time.h>
  35 #include <sys/types.h>
  36 #include <sys/wait.h>
  37
  38 #include <errno.h>
  39 #include <fcntl.h>
  40
  41 #if HAVE_SYS_UTSNAME_H
  42 #       include <sys/utsname.h>
  43 #endif
  44
  45 #if defined(__GNU_LIBRARY__) && !defined(__UCLIBC__)
  46 #       include <gnu/libc-version.h>
  47 #endif
  48
  49 #include "main.h"
  50 #include "claws.h"
  51 #include "crash.h"
  52 #include "utils.h"
  53 #include "filesel.h"
  54 #include "version.h"
  55 #include "prefs_common.h"
  56 #include "manage_window.h"
  57
  58 /*
  59  * NOTE: the crash dialog is called when claws is not
  60  * initialized, so do not assume settings are available.
  61  * for example, loading / creating pixmaps seems not
  62  * to be possible.
  63  */
  64
  65 /***/
  66
  67 static GtkWidget        *crash_dialog_show              (const gchar *text,
  68                                                          const gchar *debug_output);
  69 static void              crash_create_debugger_file     (void);
  70 static void              crash_save_crash_log           (GtkButton *, const gchar *);
  71 static void              crash_create_bug_report        (GtkButton *, const gchar *);
  72 static void              crash_debug                    (unsigned long crash_pid,
  73                                                          gchar   *exe_image,
  74                                                          GString *debug_output);
  75 static const gchar      *get_compiled_in_features       (void);
  76 static const gchar      *get_lib_version                (void);
  77 static const gchar      *get_operating_system           (void);
  78 static gboolean          is_crash_dialog_allowed        (void);
  79 static void              crash_handler                  (int sig);
  80 static void              crash_cleanup_exit             (void);
  81
  82 /***/
  83
  84 static const gchar *DEBUG_SCRIPT = "thread all apply\nbt full\nkill\nq";
  85
  86 /***/
  87
  88 /*!
  89  *\brief        install crash handlers
  90  */
  91 void crash_install_handlers(void)
  92 {
  93 #if CRASH_DIALOG
  94         sigset_t mask;
  95
  96         if (!is_crash_dialog_allowed()) return;
  97
  98         sigemptyset(&mask);
  99
 100 #ifdef SIGSEGV
 101         signal(SIGSEGV, crash_handler);
 102         sigaddset(&mask, SIGSEGV);
 103 #endif
 104
 105 #ifdef SIGFPE
 106         signal(SIGFPE, crash_handler);
 107         sigaddset(&mask, SIGFPE);
 108 #endif
 109
 110 #ifdef SIGILL
 111         signal(SIGILL, crash_handler);
 112         sigaddset(&mask, SIGILL);
 113 #endif
 114
 115 #ifdef SIGABRT
 116         signal(SIGABRT, crash_handler);
 117         sigaddset(&mask, SIGABRT);
 118 #endif
 119
 120         sigprocmask(SIG_UNBLOCK, &mask, 0);
 121 #endif /* CRASH_DIALOG */
 122 }
 123
 124 /***/
 125
 126 /*!
 127  *\brief        crash dialog entry point
 128  */
 129 void crash_main(const char *arg)
 130 {
 131 #if CRASH_DIALOG
 132         gchar *text;
 133         gchar **tokens;
 134         unsigned long pid;
 135         GString *output;
 136
 137         crash_create_debugger_file();
 138         tokens = g_strsplit(arg, ",", 0);
 139
 140         pid = atol(tokens[0]);
 141         text = g_strdup_printf(_("Claws Mail process (%ld) received signal %ld"),
 142                                pid, atol(tokens[1]));
 143
 144         output = g_string_new("");
 145         crash_debug(pid, tokens[2], output);
 146
 147         /*
 148          * try to get the settings
 149          */
 150         prefs_common_read_config();
 151
 152         crash_dialog_show(text, output->str);
 153         g_string_free(output, TRUE);
 154         g_free(text);
 155         g_strfreev(tokens);
 156 #endif /* CRASH_DIALOG */
 157 }
 158
 159 /*!
 160  *\brief        show crash dialog
 161  *
 162  *\param        text Description
 163  *\param        debug_output Output text by gdb
 164  *
 165  *\return       GtkWidget * Dialog widget
 166  */
 167 static GtkWidget *crash_dialog_show(const gchar *text, const gchar *debug_output)
 168 {
 169         GtkWidget *window1;
 170         GtkWidget *vbox1;
 171         GtkWidget *hbox1;
 172         GtkWidget *label1;
 173         GtkWidget *frame1;
 174         GtkWidget *scrolledwindow1;
 175         GtkWidget *text1;
 176         GtkWidget *hbuttonbox3;
 177         GtkWidget *hbuttonbox4;
 178         GtkWidget *button3;
 179         GtkWidget *button4;
 180         GtkWidget *button5;
 181         gchar     *crash_report;
 182         GtkTextBuffer *buffer;
 183         GtkTextIter iter;
 184
 185         window1 = gtkut_window_new(GTK_WINDOW_TOPLEVEL, "crash");
 186         gtk_container_set_border_width(GTK_CONTAINER(window1), 5);
 187         gtk_window_set_title(GTK_WINDOW(window1), _("Claws Mail has crashed"));
 188         gtk_window_set_position(GTK_WINDOW(window1), GTK_WIN_POS_CENTER);
 189         gtk_window_set_modal(GTK_WINDOW(window1), TRUE);
 190         gtk_window_set_default_size(GTK_WINDOW(window1), 460, 272);
 191
 192
 193         vbox1 = gtk_vbox_new(FALSE, 2);
 194         gtk_widget_show(vbox1);
 195         gtk_container_add(GTK_CONTAINER(window1), vbox1);
 196
 197         hbox1 = gtk_hbox_new(FALSE, 4);
 198         gtk_widget_show(hbox1);
 199         gtk_box_pack_start(GTK_BOX(vbox1), hbox1, FALSE, TRUE, 0);
 200         gtk_container_set_border_width(GTK_CONTAINER(hbox1), 4);
 201
 202         label1 = gtk_label_new
 203             (g_strdup_printf(_("%s.\nPlease file a bug report and include the information below."), text));
 204         gtk_widget_show(label1);
 205         gtk_box_pack_start(GTK_BOX(hbox1), label1, TRUE, TRUE, 0);
 206         gtk_misc_set_alignment(GTK_MISC(label1), 7.45058e-09, 0.5);
 207
 208         frame1 = gtk_frame_new(_("Debug log"));
 209         gtk_widget_show(frame1);
 210         gtk_box_pack_start(GTK_BOX(vbox1), frame1, TRUE, TRUE, 0);
 211
 212         scrolledwindow1 = gtk_scrolled_window_new(NULL, NULL);
 213         gtk_widget_show(scrolledwindow1);
 214         gtk_container_add(GTK_CONTAINER(frame1), scrolledwindow1);
 215         gtk_container_set_border_width(GTK_CONTAINER(scrolledwindow1), 3);
 216         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwindow1),
 217                                        GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 218
 219         text1 = gtk_text_view_new();
 220         gtk_text_view_set_editable(GTK_TEXT_VIEW(text1), FALSE);
 221         gtk_widget_show(text1);
 222         gtk_container_add(GTK_CONTAINER(scrolledwindow1), text1);
 223
 224         crash_report = g_strdup_printf(
 225                 "Claws Mail version %s\n"
 226                 "GTK+ version %d.%d.%d / GLib %d.%d.%d\n"
 227                 "Locale: %s (charset: %s)\n"
 228                 "Features:%s\n"
 229                 "Operating system: %s\n"
 230                 "C Library: %s\n--\n%s",
 231                 VERSION,
 232                 gtk_major_version, gtk_minor_version, gtk_micro_version,
 233                 glib_major_version, glib_minor_version, glib_micro_version,
 234                 conv_get_current_locale(), conv_get_locale_charset_str(),
 235                 get_compiled_in_features(),
 236                 get_operating_system(),
 237                 get_lib_version(),
 238                 debug_output);
 239
 240         buffer = gtk_text_view_get_buffer(GTK_TEXT_VIEW(text1));
 241         gtk_text_buffer_get_start_iter(buffer, &iter);
 242         gtk_text_buffer_insert(buffer, &iter, crash_report, -1);
 243
 244         hbuttonbox3 = gtk_hbutton_box_new();
 245         gtk_widget_show(hbuttonbox3);
 246         gtk_box_pack_start(GTK_BOX(vbox1), hbuttonbox3, FALSE, FALSE, 0);
 247
 248         hbuttonbox4 = gtk_hbutton_box_new();
 249         gtk_widget_show(hbuttonbox4);
 250         gtk_box_pack_start(GTK_BOX(vbox1), hbuttonbox4, FALSE, FALSE, 0);
 251
 252         button3 = gtk_button_new_with_label(_("Close"));
 253         gtk_widget_show(button3);
 254         gtk_container_add(GTK_CONTAINER(hbuttonbox4), button3);
 255         gtkut_widget_set_can_default(button3, TRUE);
 256
 257         button4 = gtk_button_new_with_label(_("Save..."));
 258         gtk_widget_show(button4);
 259         gtk_container_add(GTK_CONTAINER(hbuttonbox4), button4);
 260         gtkut_widget_set_can_default(button4, TRUE);
 261
 262         button5 = gtk_button_new_with_label(_("Create bug report"));
 263         gtk_widget_show(button5);
 264         gtk_container_add(GTK_CONTAINER(hbuttonbox4), button5);
 265         gtkut_widget_set_can_default(button5, TRUE);
 266
 267         g_signal_connect(G_OBJECT(window1), "delete_event",
 268                          G_CALLBACK(gtk_main_quit), NULL);
 269         g_signal_connect(G_OBJECT(button3),   "clicked",
 270                          G_CALLBACK(gtk_main_quit), NULL);
 271         g_signal_connect(G_OBJECT(button4), "clicked",
 272                          G_CALLBACK(crash_save_crash_log), crash_report);
 273         g_signal_connect(G_OBJECT(button5), "clicked",
 274                          G_CALLBACK(crash_create_bug_report), NULL);
 275
 276         MANAGE_WINDOW_SIGNALS_CONNECT(window1);
 277
 278         gtk_widget_show(window1);
 279
 280         gtk_main();
 281         return window1;
 282 }
 283
 284
 285 /*!
 286  *\brief        create debugger script file in claws directory.
 287  *              all the other options (creating temp files) looked too
 288  *              convoluted.
 289  */
 290 static void crash_create_debugger_file(void)
 291 {
 292         gchar *filespec = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S, DEBUGGERRC, NULL);
 293
 294         str_write_to_file(DEBUG_SCRIPT, filespec);
 295         g_free(filespec);
 296 }
 297
 298 /*!
 299  *\brief        saves crash log to a file
 300  */
 301 static void crash_save_crash_log(GtkButton *button, const gchar *text)
 302 {
 303         time_t timer;
 304         struct tm *lt;
 305         char buf[100];
 306         struct tm buft;
 307         gchar *filename;
 308
 309         timer = time(NULL);
 310         lt = localtime_r(&timer, &buft);
 311         strftime(buf, sizeof buf, "claws-crash-log-%Y-%m-%d-%H-%M-%S.txt", lt);
 312         if (NULL != (filename = filesel_select_file_save(_("Save crash information"), buf))
 313         &&  *filename)
 314                 str_write_to_file(text, filename);
 315         g_free(filename);
 316 }
 317
 318 /*!
 319  *\brief        create bug report (goes to Claws Mail bug tracker)
 320  */
 321 static void crash_create_bug_report(GtkButton *button, const gchar *data)
 322 {
 323         open_uri(BUGZILLA_URI, prefs_common_get_uri_cmd());
 324 }
 325
 326 /*!
 327  *\brief        launches debugger and attaches it to crashed claws
 328  */
 329 static void crash_debug(unsigned long crash_pid,
 330                         gchar *exe_image,
 331                         GString *debug_output)
 332 {
 333         int choutput[2];
 334         pid_t pid;
 335
 336         pipe(choutput);
 337
 338         if (0 == (pid = fork())) {
 339                 char *argp[10];
 340                 char **argptr = argp;
 341                 gchar *filespec = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S, DEBUGGERRC, NULL);
 342
 343                 setgid(getgid());
 344                 setuid(getuid());
 345
 346                 /*
 347                  * setup debugger to attach to crashed claws
 348                  */
 349                 *argptr++ = "gdb";
 350                 *argptr++ = "--nw";
 351                 *argptr++ = "--nx";
 352                 *argptr++ = "--quiet";
 353                 *argptr++ = "--batch";
 354                 *argptr++ = "-x";
 355                 *argptr++ = filespec;
 356                 *argptr++ = exe_image;
 357                 *argptr++ = g_strdup_printf("%ld", crash_pid);
 358                 *argptr   = NULL;
 359
 360                 /*
 361                  * redirect output to write end of pipe
 362                  */
 363                 close(1);
 364                 dup(choutput[1]);
 365                 close(choutput[0]);
 366                 if (-1 == execvp("gdb", argp))
 367                         g_print("error execvp\n");
 368         } else {
 369                 char buf[100];
 370                 int r;
 371
 372                 waitpid(pid, NULL, 0);
 373
 374                 /*
 375                  * make it non blocking
 376                  */
 377                 if (-1 == fcntl(choutput[0], F_SETFL, O_NONBLOCK))
 378                         g_print("set to non blocking failed\n");
 379
 380                 /*
 381                  * get the output
 382                  */
 383                 do {
 384                         r = read(choutput[0], buf, sizeof buf - 1);
 385                         if (r > 0) {
 386                                 buf[r] = 0;
 387                                 g_string_append(debug_output, buf);
 388                         }
 389                 } while (r > 0);
 390
 391                 close(choutput[0]);
 392                 close(choutput[1]);
 393
 394                 /*
 395                  * kill the process we attached to
 396                  */
 397                 kill(crash_pid, SIGCONT);
 398         }
 399 }
 400
 401 /***/
 402
 403 /*!
 404  *\brief        features
 405  */
 406 static const gchar *get_compiled_in_features(void)
 407 {
 408         return g_strdup_printf("%s",
 409 #if INET6
 410                    " IPv6"
 411 #endif
 412 #if HAVE_ICONV
 413                    " iconv"
 414 #endif
 415 #if HAVE_LIBCOMPFACE
 416                    " compface"
 417 #endif
 418 #if USE_GNUTLS
 419                    " GnuTLS"
 420 #endif
 421 #if USE_LDAP
 422                    " LDAP"
 423 #endif
 424 #if USE_JPILOT
 425                    " JPilot"
 426 #endif
 427 #if USE_ENCHANT
 428                    " GNU/aspell"
 429 #endif
 430 #if HAVE_LIBETPAN
 431                    " libetpan"
 432 #endif
 433 #if HAVE_LIBSM
 434                    " libSM"
 435 #endif
 436         "");
 437 }
 438
 439 /***/
 440
 441 /*!
 442  *\brief        library version
 443  */
 444 static const gchar *get_lib_version(void)
 445 {
 446 #if defined(__UCLIBC__)
 447         return g_strdup_printf("uClibc %i.%i.%i", __UCLIBC_MAJOR__, __UCLIBC_MINOR__, __UCLIBC_SUBLEVEL__);
 448 #elif defined(__GNU_LIBRARY__)
 449         return g_strdup_printf("GNU libc %s", gnu_get_libc_version());
 450 #else
 451         return g_strdup(_("Unknown"));
 452 #endif
 453 }
 454
 455 /***/
 456
 457 /*!
 458  *\brief        operating system
 459  */
 460 static const gchar *get_operating_system(void)
 461 {
 462 #if HAVE_SYS_UTSNAME_H
 463         struct utsname utsbuf;
 464         uname(&utsbuf);
 465         return g_strdup_printf("%s %s (%s)",
 466                                utsbuf.sysname,
 467                                utsbuf.release,
 468                                utsbuf.machine);
 469 #else
 470         return g_strdup(_("Unknown"));
 471
 472 #endif
 473 }
 474
 475 /***/
 476
 477 /*!
 478  *\brief        see if the crash dialog is allowed (because some
 479  *              developers may prefer to run claws-mail under gdb...)
 480  */
 481 static gboolean is_crash_dialog_allowed(void)
 482 {
 483         return !getenv("CLAWS_NO_CRASH");
 484 }
 485
 486 /*!
 487  *\brief        this handler will probably evolve into
 488  *              something better.
 489  */
 490 static void crash_handler(int sig)
 491 {
 492         pid_t pid;
 493         static volatile unsigned long crashed_ = 0;
 494
 495         /*
 496          * let's hope argv0 aren't trashed.
 497          * both are defined in main.c.
 498          */
 499         extern gchar *argv0;
 500
 501
 502         /*
 503          * besides guarding entrancy it's probably also better
 504          * to mask off signals
 505          */
 506         if (crashed_) return;
 507
 508         crashed_++;
 509
 510 #ifdef SIGTERM
 511         if (sig == SIGTERM)
 512                 clean_quit(NULL);
 513 #endif
 514
 515         /*
 516          * gnome ungrabs focus, and flushes gdk. mmmh, good idea.
 517          */
 518         gdk_pointer_ungrab(GDK_CURRENT_TIME);
 519         gdk_keyboard_ungrab(GDK_CURRENT_TIME);
 520         gdk_flush();
 521
 522         if (0 == (pid = fork())) {
 523                 char buf[50];
 524                 char *args[5];
 525
 526                 /*
 527                  * probably also some other parameters (like GTK+ ones).
 528                  * also we pass the full startup dir and the real command
 529                  * line typed in (argv0)
 530                  */
 531                 args[0] = argv0;
 532                 args[1] = "--debug";
 533                 args[2] = "--crash";
 534                 sprintf(buf, "%d,%d,%s", getppid(), sig, argv0);
 535                 args[3] = buf;
 536                 args[4] = NULL;
 537
 538                 chdir(claws_get_startup_dir());
 539                 setgid(getgid());
 540                 setuid(getuid());
 541                 execvp(argv0, args);
 542         } else {
 543                 waitpid(pid, NULL, 0);
 544                 crash_cleanup_exit();
 545                 _exit(253);
 546         }
 547
 548         _exit(253);
 549 }
 550
 551 /*!
 552  *\brief        put all the things here we can do before
 553  *              letting the program die
 554  */
 555 static void crash_cleanup_exit(void)
 556 {
 557         const char *filename = claws_get_socket_name();
 558         claws_unlink(filename);
 559 }
 560
 561 #endif