src/crash.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 2002 by the Claws Mail Team and Hiroyuki Yamamoto
   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 2 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, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  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__)
  46 #       include <gnu/libc-version.h>
  47 #endif
  48
  49 #ifdef SIGTERM
  50 #include "main.h"
  51 #endif
  52 #include "claws.h"
  53 #include "crash.h"
  54 #include "utils.h"
  55 #include "filesel.h"
  56 #include "version.h"
  57 #include "prefs_common.h"
  58
  59 /*
  60  * NOTE: the crash dialog is called when claws is not
  61  * initialized, so do not assume settings are available.
  62  * for example, loading / creating pixmaps seems not
  63  * to be possible.
  64  */
  65
  66 /***/
  67
  68 static GtkWidget        *crash_dialog_show              (const gchar *text,
  69                                                          const gchar *debug_output);
  70 static void              crash_create_debugger_file     (void);
  71 static void              crash_save_crash_log           (GtkButton *, const gchar *);
  72 static void              crash_create_bug_report        (GtkButton *, const gchar *);
  73 static void              crash_debug                    (unsigned long crash_pid,
  74                                                          gchar   *exe_image,
  75                                                          GString *debug_output);
  76 static const gchar      *get_compiled_in_features       (void);
  77 static const gchar      *get_lib_version                (void);
  78 static const gchar      *get_operating_system           (void);
  79 static gboolean          is_crash_dialog_allowed        (void);
  80 static void              crash_handler                  (int sig);
  81 static void              crash_cleanup_exit             (void);
  82
  83 /***/
  84
  85 static const gchar *DEBUG_SCRIPT = "bt\nkill\nq";
  86
  87 /***/
  88
  89 /*!
  90  *\brief        install crash handlers
  91  */
  92 void crash_install_handlers(void)
  93 {
  94 #if CRASH_DIALOG
  95         sigset_t mask;
  96
  97         if (!is_crash_dialog_allowed()) return;
  98
  99         sigemptyset(&mask);
 100
 101 #ifdef SIGSEGV
 102         signal(SIGSEGV, crash_handler);
 103         sigaddset(&mask, SIGSEGV);
 104 #endif
 105
 106 #ifdef SIGFPE
 107         signal(SIGFPE, crash_handler);
 108         sigaddset(&mask, SIGFPE);
 109 #endif
 110
 111 #ifdef SIGILL
 112         signal(SIGILL, crash_handler);
 113         sigaddset(&mask, SIGILL);
 114 #endif
 115
 116 #ifdef SIGABRT
 117         signal(SIGABRT, crash_handler);
 118         sigaddset(&mask, SIGABRT);
 119 #endif
 120
 121         sigprocmask(SIG_UNBLOCK, &mask, 0);
 122 #endif /* CRASH_DIALOG */
 123 }
 124
 125 /***/
 126
 127 /*!
 128  *\brief        crash dialog entry point
 129  */
 130 void crash_main(const char *arg)
 131 {
 132 #if CRASH_DIALOG
 133         gchar *text;
 134         gchar **tokens;
 135         unsigned long pid;
 136         GString *output;
 137
 138         crash_create_debugger_file();
 139         tokens = g_strsplit(arg, ",", 0);
 140
 141         pid = atol(tokens[0]);
 142         text = g_strdup_printf(_("Claws Mail process (%ld) received signal %ld"),
 143                                pid, atol(tokens[1]));
 144
 145         output = g_string_new("");
 146         crash_debug(pid, tokens[2], output);
 147
 148         /*
 149          * try to get the settings
 150          */
 151         prefs_common_read_config();
 152
 153         crash_dialog_show(text, output->str);
 154         g_string_free(output, TRUE);
 155         g_free(text);
 156         g_strfreev(tokens);
 157 #endif /* CRASH_DIALOG */
 158 }
 159
 160 /*!
 161  *\brief        show crash dialog
 162  *
 163  *\param        text Description
 164  *\param        debug_output Output text by gdb
 165  *
 166  *\return       GtkWidget * Dialog widget
 167  */
 168 static GtkWidget *crash_dialog_show(const gchar *text, const gchar *debug_output)
 169 {
 170         GtkWidget *window1;
 171         GtkWidget *vbox1;
 172         GtkWidget *hbox1;
 173         GtkWidget *label1;
 174         GtkWidget *frame1;
 175         GtkWidget *scrolledwindow1;
 176         GtkWidget *text1;
 177         GtkWidget *hbuttonbox3;
 178         GtkWidget *hbuttonbox4;
 179         GtkWidget *button3;
 180         GtkWidget *button4;
 181         GtkWidget *button5;
 182         gchar     *crash_report;
 183         GtkTextBuffer *buffer;
 184         GtkTextIter iter;
 185
 186         window1 = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 187         gtk_container_set_border_width(GTK_CONTAINER(window1), 5);
 188         gtk_window_set_title(GTK_WINDOW(window1), _("Claws Mail has crashed"));
 189         gtk_window_set_position(GTK_WINDOW(window1), GTK_WIN_POS_CENTER);
 190         gtk_window_set_modal(GTK_WINDOW(window1), TRUE);
 191         gtk_window_set_default_size(GTK_WINDOW(window1), 460, 272);
 192
 193
 194         vbox1 = gtk_vbox_new(FALSE, 2);
 195         gtk_widget_show(vbox1);
 196         gtk_container_add(GTK_CONTAINER(window1), vbox1);
 197
 198         hbox1 = gtk_hbox_new(FALSE, 4);
 199         gtk_widget_show(hbox1);
 200         gtk_box_pack_start(GTK_BOX(vbox1), hbox1, FALSE, TRUE, 0);
 201         gtk_container_set_border_width(GTK_CONTAINER(hbox1), 4);
 202
 203         label1 = gtk_label_new
 204             (g_strdup_printf(_("%s.\nPlease file a bug report and include the information below."), text));
 205         gtk_widget_show(label1);
 206         gtk_box_pack_start(GTK_BOX(hbox1), label1, TRUE, TRUE, 0);
 207         gtk_misc_set_alignment(GTK_MISC(label1), 7.45058e-09, 0.5);
 208
 209         frame1 = gtk_frame_new(_("Debug log"));
 210         gtk_widget_show(frame1);
 211         gtk_box_pack_start(GTK_BOX(vbox1), frame1, TRUE, TRUE, 0);
 212
 213         scrolledwindow1 = gtk_scrolled_window_new(NULL, NULL);
 214         gtk_widget_show(scrolledwindow1);
 215         gtk_container_add(GTK_CONTAINER(frame1), scrolledwindow1);
 216         gtk_container_set_border_width(GTK_CONTAINER(scrolledwindow1), 3);
 217         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwindow1),
 218                                        GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 219
 220         text1 = gtk_text_view_new();
 221         gtk_text_view_set_editable(GTK_TEXT_VIEW(text1), FALSE);
 222         gtk_widget_show(text1);
 223         gtk_container_add(GTK_CONTAINER(scrolledwindow1), text1);
 224
 225         crash_report = g_strdup_printf(
 226                 "Claws Mail version %s\n"
 227                 "GTK+ version %d.%d.%d / GLib %d.%d.%d\n"
 228                 "Locale: %s (charset: %s)\n"
 229                 "Features:%s\n"
 230                 "Operating system: %s\n"
 231                 "C Library: %s\n--\n%s",
 232                 VERSION,
 233                 gtk_major_version, gtk_minor_version, gtk_micro_version,
 234                 glib_major_version, glib_minor_version, glib_micro_version,
 235                 conv_get_current_locale(), conv_get_locale_charset_str(),
 236                 get_compiled_in_features(),
 237                 get_operating_system(),
 238                 get_lib_version(),
 239                 debug_output);
 240
 241         buffer = gtk_text_view_get_buffer(GTK_TEXT_VIEW(text1));
 242         gtk_text_buffer_get_start_iter(buffer, &iter);
 243         gtk_text_buffer_insert(buffer, &iter, crash_report, -1);
 244
 245         hbuttonbox3 = gtk_hbutton_box_new();
 246         gtk_widget_show(hbuttonbox3);
 247         gtk_box_pack_start(GTK_BOX(vbox1), hbuttonbox3, FALSE, FALSE, 0);
 248
 249         hbuttonbox4 = gtk_hbutton_box_new();
 250         gtk_widget_show(hbuttonbox4);
 251         gtk_box_pack_start(GTK_BOX(vbox1), hbuttonbox4, FALSE, FALSE, 0);
 252
 253         button3 = gtk_button_new_with_label(_("Close"));
 254         gtk_widget_show(button3);
 255         gtk_container_add(GTK_CONTAINER(hbuttonbox4), button3);
 256         GTK_WIDGET_SET_FLAGS(button3, GTK_CAN_DEFAULT);
 257
 258         button4 = gtk_button_new_with_label(_("Save..."));
 259         gtk_widget_show(button4);
 260         gtk_container_add(GTK_CONTAINER(hbuttonbox4), button4);
 261         GTK_WIDGET_SET_FLAGS(button4, GTK_CAN_DEFAULT);
 262
 263         button5 = gtk_button_new_with_label(_("Create bug report"));
 264         gtk_widget_show(button5);
 265         gtk_container_add(GTK_CONTAINER(hbuttonbox4), button5);
 266         GTK_WIDGET_SET_FLAGS(button5, GTK_CAN_DEFAULT);
 267
 268         g_signal_connect(G_OBJECT(window1), "delete_event",
 269                          G_CALLBACK(gtk_main_quit), NULL);
 270         g_signal_connect(G_OBJECT(button3),   "clicked",
 271                          G_CALLBACK(gtk_main_quit), NULL);
 272         g_signal_connect(G_OBJECT(button4), "clicked",
 273                          G_CALLBACK(crash_save_crash_log), crash_report);
 274         g_signal_connect(G_OBJECT(button5), "clicked",
 275                          G_CALLBACK(crash_create_bug_report), NULL);
 276
 277         gtk_widget_show(window1);
 278
 279         gtk_main();
 280         return window1;
 281 }
 282
 283
 284 /*!
 285  *\brief        create debugger script file in claws directory.
 286  *              all the other options (creating temp files) looked too
 287  *              convoluted.
 288  */
 289 static void crash_create_debugger_file(void)
 290 {
 291         gchar *filespec = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S, DEBUGGERRC, NULL);
 292
 293         str_write_to_file(DEBUG_SCRIPT, filespec);
 294         g_free(filespec);
 295 }
 296
 297 /*!
 298  *\brief        saves crash log to a file
 299  */
 300 static void crash_save_crash_log(GtkButton *button, const gchar *text)
 301 {
 302         time_t timer;
 303         struct tm *lt;
 304         char buf[100];
 305         gchar *filename;
 306
 307         timer = time(NULL);
 308         lt = localtime(&timer);
 309         strftime(buf, sizeof buf, "claws-crash-log-%Y-%m-%d-%H-%M-%S.txt", lt);
 310         if (NULL != (filename = filesel_select_file_save(_("Save crash information"), buf))
 311         &&  *filename)
 312                 str_write_to_file(text, filename);
 313         g_free(filename);
 314 }
 315
 316 /*!
 317  *\brief        create bug report (goes to Claws Mail bug tracker)
 318  */
 319 static void crash_create_bug_report(GtkButton *button, const gchar *data)
 320 {
 321         open_uri(BUGZILLA_URI, prefs_common.uri_cmd);
 322 }
 323
 324 /*!
 325  *\brief        launches debugger and attaches it to crashed claws
 326  */
 327 static void crash_debug(unsigned long crash_pid,
 328                         gchar *exe_image,
 329                         GString *debug_output)
 330 {
 331         int choutput[2];
 332         pid_t pid;
 333
 334         pipe(choutput);
 335
 336         if (0 == (pid = fork())) {
 337                 char *argp[10];
 338                 char **argptr = argp;
 339                 gchar *filespec = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S, DEBUGGERRC, NULL);
 340
 341                 setgid(getgid());
 342                 setuid(getuid());
 343
 344                 /*
 345                  * setup debugger to attach to crashed claws
 346                  */
 347                 *argptr++ = "gdb";
 348                 *argptr++ = "--nw";
 349                 *argptr++ = "--nx";
 350                 *argptr++ = "--quiet";
 351                 *argptr++ = "--batch";
 352                 *argptr++ = "-x";
 353                 *argptr++ = filespec;
 354                 *argptr++ = exe_image;
 355                 *argptr++ = g_strdup_printf("%ld", crash_pid);
 356                 *argptr   = NULL;
 357
 358                 /*
 359                  * redirect output to write end of pipe
 360                  */
 361                 close(1);
 362                 dup(choutput[1]);
 363                 close(choutput[0]);
 364                 if (-1 == execvp("gdb", argp))
 365                         puts("error execvp\n");
 366         } else {
 367                 char buf[100];
 368                 int r;
 369
 370                 waitpid(pid, NULL, 0);
 371
 372                 /*
 373                  * make it non blocking
 374                  */
 375                 if (-1 == fcntl(choutput[0], F_SETFL, O_NONBLOCK))
 376                         puts("set to non blocking failed\n");
 377
 378                 /*
 379                  * get the output
 380                  */
 381                 do {
 382                         r = read(choutput[0], buf, sizeof buf - 1);
 383                         if (r > 0) {
 384                                 buf[r] = 0;
 385                                 g_string_append(debug_output, buf);
 386                         }
 387                 } while (r > 0);
 388
 389                 close(choutput[0]);
 390                 close(choutput[1]);
 391
 392                 /*
 393                  * kill the process we attached to
 394                  */
 395                 kill(crash_pid, SIGCONT);
 396         }
 397 }
 398
 399 /***/
 400
 401 /*!
 402  *\brief        features
 403  */
 404 static const gchar *get_compiled_in_features(void)
 405 {
 406         return g_strdup_printf("%s",
 407 #if USE_THREADS
 408                    " gthread"
 409 #endif
 410 #if INET6
 411                    " IPv6"
 412 #endif
 413 #if HAVE_ICONV
 414                    " iconv"
 415 #endif
 416 #if HAVE_LIBCOMPFACE
 417                    " compface"
 418 #endif
 419 #if USE_OPENSSL
 420                    " OpenSSL"
 421 #endif
 422 #if USE_LDAP
 423                    " LDAP"
 424 #endif
 425 #if USE_JPILOT
 426                    " JPilot"
 427 #endif
 428 #if USE_ASPELL
 429                    " GNU/aspell"
 430 #endif
 431 #if HAVE_LIBETPAN
 432                    " libetpan"
 433 #endif
 434 #if USE_GNOMEPRINT
 435                    " libgnomeprint"
 436 #endif
 437 #if HAVE_LIBSM
 438                    " libSM"
 439 #endif
 440         "");
 441 }
 442
 443 /***/
 444
 445 /*!
 446  *\brief        library version
 447  */
 448 static const gchar *get_lib_version(void)
 449 {
 450 #if defined(__GNU_LIBRARY__)
 451         return g_strdup_printf("GNU libc %s", gnu_get_libc_version());
 452 #else
 453         return g_strdup(_("Unknown"));
 454 #endif
 455 }
 456
 457 /***/
 458
 459 /*!
 460  *\brief        operating system
 461  */
 462 static const gchar *get_operating_system(void)
 463 {
 464 #if HAVE_SYS_UTSNAME_H
 465         struct utsname utsbuf;
 466         uname(&utsbuf);
 467         return g_strdup_printf("%s %s (%s)",
 468                                utsbuf.sysname,
 469                                utsbuf.release,
 470                                utsbuf.machine);
 471 #else
 472         return g_strdup(_("Unknown"));
 473
 474 #endif
 475 }
 476
 477 /***/
 478
 479 /*!
 480  *\brief        see if the crash dialog is allowed (because some
 481  *              developers may prefer to run claws-mail under gdb...)
 482  */
 483 static gboolean is_crash_dialog_allowed(void)
 484 {
 485         return !getenv("CLAWS_NO_CRASH");
 486 }
 487
 488 /*!
 489  *\brief        this handler will probably evolve into
 490  *              something better.
 491  */
 492 static void crash_handler(int sig)
 493 {
 494         pid_t pid;
 495         static volatile unsigned long crashed_ = 0;
 496
 497         /*
 498          * let's hope argv0 aren't trashed.
 499          * both are defined in main.c.
 500          */
 501         extern gchar *argv0;
 502
 503
 504         /*
 505          * besides guarding entrancy it's probably also better
 506          * to mask off signals
 507          */
 508         if (crashed_) return;
 509
 510         crashed_++;
 511
 512 #ifdef SIGTERM
 513         if (sig == SIGTERM)
 514                 clean_quit(NULL);
 515 #endif
 516
 517         /*
 518          * gnome ungrabs focus, and flushes gdk. mmmh, good idea.
 519          */
 520         gdk_pointer_ungrab(GDK_CURRENT_TIME);
 521         gdk_keyboard_ungrab(GDK_CURRENT_TIME);
 522         gdk_flush();
 523
 524         if (0 == (pid = fork())) {
 525                 char buf[50];
 526                 char *args[5];
 527
 528                 /*
 529                  * probably also some other parameters (like GTK+ ones).
 530                  * also we pass the full startup dir and the real command
 531                  * line typed in (argv0)
 532                  */
 533                 args[0] = argv0;
 534                 args[1] = "--debug";
 535                 args[2] = "--crash";
 536                 sprintf(buf, "%d,%d,%s", getppid(), sig, argv0);
 537                 args[3] = buf;
 538                 args[4] = NULL;
 539
 540                 chdir(claws_get_startup_dir());
 541                 setgid(getgid());
 542                 setuid(getuid());
 543                 execvp(argv0, args);
 544         } else {
 545                 waitpid(pid, NULL, 0);
 546                 crash_cleanup_exit();
 547                 _exit(253);
 548         }
 549
 550         _exit(253);
 551 }
 552
 553 /*!
 554  *\brief        put all the things here we can do before
 555  *              letting the program die
 556  */
 557 static void crash_cleanup_exit(void)
 558 {
 559         extern gchar *get_socket_name(void);
 560         const char *filename = get_socket_name();
 561         g_unlink(filename);
 562 }
 563
 564 #endif