src/crash.c

   1 /*
   2  * Claws Mail -- a GTK based, lightweight, and fast e-mail client
   3  * Copyright (C) 2002-2019 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 #ifdef HAVE_CONFIG_H
  20 #       include <config.h>
  21 #endif
  22
  23 #ifdef CRASH_DIALOG
  24
  25 #include "defs.h"
  26
  27 #include <glib.h>
  28 #include <glib/gi18n.h>
  29 #include <gtk/gtk.h>
  30 #include <stdio.h>
  31 #include <stdlib.h>
  32 #include <signal.h>
  33 #include <time.h>
  34 #include <sys/types.h>
  35 #include <sys/wait.h>
  36
  37 #include <errno.h>
  38 #include <fcntl.h>
  39
  40 #if HAVE_SYS_UTSNAME_H
  41 #       include <sys/utsname.h>
  42 #endif
  43
  44 #if defined(__GNU_LIBRARY__) && !defined(__UCLIBC__)
  45 #       include <gnu/libc-version.h>
  46 #endif
  47
  48 #include "main.h"
  49 #include "claws.h"
  50 #include "crash.h"
  51 #include "file-utils.h"
  52 #include "filesel.h"
  53 #include "version.h"
  54 #include "prefs_common.h"
  55 #include "manage_window.h"
  56
  57 /*
  58  * NOTE: the crash dialog is called when claws is not
  59  * initialized, so do not assume settings are available.
  60  * for example, loading / creating pixmaps seems not
  61  * to be possible.
  62  */
  63
  64 /***/
  65
  66 static GtkWidget        *crash_dialog_show              (const gchar *text,
  67                                                          const gchar *debug_output);
  68 static void              crash_create_debugger_file     (void);
  69 static void              crash_save_crash_log           (GtkButton *, const gchar *);
  70 static void              crash_create_bug_report        (GtkButton *, const gchar *);
  71 static void              crash_debug                    (unsigned long crash_pid,
  72                                                          gchar   *exe_image,
  73                                                          GString *debug_output);
  74 static gchar            *get_compiled_in_features   (void);
  75 static gchar            *get_lib_version        (void);
  76 static gchar            *get_operating_system       (void);
  77 static gboolean          is_crash_dialog_allowed        (void);
  78 static void              crash_handler                  (int sig);
  79 static void              crash_cleanup_exit             (void);
  80
  81 /***/
  82
  83 static const gchar *DEBUG_SCRIPT = "thread all apply\nbt full\nkill\nq";
  84
  85 /***/
  86
  87 /*!
  88  *\brief        install crash handlers
  89  */
  90 void crash_install_handlers(void)
  91 {
  92 #if CRASH_DIALOG
  93         sigset_t mask;
  94
  95         if (!is_crash_dialog_allowed()) return;
  96
  97         sigemptyset(&mask);
  98
  99 #ifdef SIGSEGV
 100         signal(SIGSEGV, crash_handler);
 101         sigaddset(&mask, SIGSEGV);
 102 #endif
 103
 104 #ifdef SIGFPE
 105         signal(SIGFPE, crash_handler);
 106         sigaddset(&mask, SIGFPE);
 107 #endif
 108
 109 #ifdef SIGILL
 110         signal(SIGILL, crash_handler);
 111         sigaddset(&mask, SIGILL);
 112 #endif
 113
 114 #ifdef SIGABRT
 115         signal(SIGABRT, crash_handler);
 116         sigaddset(&mask, SIGABRT);
 117 #endif
 118
 119         sigprocmask(SIG_UNBLOCK, &mask, 0);
 120 #endif /* CRASH_DIALOG */
 121 }
 122
 123 /***/
 124
 125 /*!
 126  *\brief        crash dialog entry point
 127  */
 128 void crash_main(const char *arg)
 129 {
 130 #if CRASH_DIALOG
 131         gchar *text;
 132         gchar **tokens;
 133         unsigned long pid;
 134         GString *output;
 135
 136         crash_create_debugger_file();
 137         tokens = g_strsplit(arg, ",", 0);
 138
 139         pid = atol(tokens[0]);
 140         text = g_strdup_printf(_("Claws Mail process (%ld) received signal %ld"),
 141                                pid, atol(tokens[1]));
 142
 143         output = g_string_new("");
 144         crash_debug(pid, tokens[2], output);
 145
 146         /*
 147          * try to get the settings
 148          */
 149         prefs_common_read_config();
 150
 151         crash_dialog_show(text, output->str);
 152         g_string_free(output, TRUE);
 153         g_free(text);
 154         g_strfreev(tokens);
 155 #endif /* CRASH_DIALOG */
 156 }
 157
 158 /*!
 159  *\brief        show crash dialog
 160  *
 161  *\param        text Description
 162  *\param        debug_output Output text by gdb
 163  *
 164  *\return       GtkWidget * Dialog widget
 165  */
 166 static GtkWidget *crash_dialog_show(const gchar *text, const gchar *debug_output)
 167 {
 168         GtkWidget *window1;
 169         GtkWidget *vbox1;
 170         GtkWidget *hbox1;
 171         GtkWidget *label1;
 172         GtkWidget *frame1;
 173         GtkWidget *scrolledwindow1;
 174         GtkWidget *text1;
 175         GtkWidget *hbuttonbox3;
 176         GtkWidget *hbuttonbox4;
 177         GtkWidget *button3;
 178         GtkWidget *button4;
 179         GtkWidget *button5;
 180         gchar     *crash_report;
 181         GtkTextBuffer *buffer;
 182         GtkTextIter iter;
 183         gchar *features = get_compiled_in_features();
 184         gchar *os = get_operating_system();
 185         gchar *lversion = get_lib_version();
 186
 187         window1 = gtkut_window_new(GTK_WINDOW_TOPLEVEL, "crash");
 188         gtk_container_set_border_width(GTK_CONTAINER(window1), 5);
 189         gtk_window_set_title(GTK_WINDOW(window1), _("Claws Mail has crashed"));
 190         gtk_window_set_position(GTK_WINDOW(window1), GTK_WIN_POS_CENTER);
 191         gtk_window_set_type_hint(GTK_WINDOW(window1), GDK_WINDOW_TYPE_HINT_DIALOG);
 192         gtk_window_set_modal(GTK_WINDOW(window1), TRUE);
 193         gtk_window_set_default_size(GTK_WINDOW(window1), 460, 272);
 194
 195
 196         vbox1 = gtk_box_new(GTK_ORIENTATION_VERTICAL, 2);
 197         gtk_widget_show(vbox1);
 198         gtk_container_add(GTK_CONTAINER(window1), vbox1);
 199
 200         hbox1 = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 4);
 201         gtk_widget_show(hbox1);
 202         gtk_box_pack_start(GTK_BOX(vbox1), hbox1, FALSE, TRUE, 0);
 203         gtk_container_set_border_width(GTK_CONTAINER(hbox1), 4);
 204
 205         label1 = gtk_label_new
 206             (g_strdup_printf(_("%s.\nPlease file a bug report and include the information below."), text));
 207         gtk_widget_show(label1);
 208         gtk_box_pack_start(GTK_BOX(hbox1), label1, TRUE, TRUE, 0);
 209         gtk_label_set_xalign(GTK_LABEL(label1), 0.0);
 210
 211         frame1 = gtk_frame_new(_("Debug log"));
 212         gtk_widget_show(frame1);
 213         gtk_box_pack_start(GTK_BOX(vbox1), frame1, TRUE, TRUE, 0);
 214
 215         scrolledwindow1 = gtk_scrolled_window_new(NULL, NULL);
 216         gtk_widget_show(scrolledwindow1);
 217         gtk_container_add(GTK_CONTAINER(frame1), scrolledwindow1);
 218         gtk_container_set_border_width(GTK_CONTAINER(scrolledwindow1), 3);
 219         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwindow1),
 220                                        GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 221
 222         text1 = gtk_text_view_new();
 223         gtk_text_view_set_editable(GTK_TEXT_VIEW(text1), FALSE);
 224         gtk_widget_show(text1);
 225         gtk_container_add(GTK_CONTAINER(scrolledwindow1), text1);
 226
 227         crash_report = g_strdup_printf(
 228                 "Claws Mail version %s\n"
 229                 "GTK version %d.%d.%d / GLib %d.%d.%d\n"
 230                 "Locale: %s (charset: %s)\n"
 231                 "Features:%s\n"
 232                 "Operating system: %s\n"
 233                 "C Library: %s\n--\n%s",
 234                 VERSION,
 235                 gtk_major_version, gtk_minor_version, gtk_micro_version,
 236                 glib_major_version, glib_minor_version, glib_micro_version,
 237                 conv_get_current_locale(), conv_get_locale_charset_str(),
 238                 features, os, lversion, debug_output);
 239         g_free(features);
 240         g_free(os);
 241         g_free(lversion);
 242
 243         buffer = gtk_text_view_get_buffer(GTK_TEXT_VIEW(text1));
 244         gtk_text_buffer_get_start_iter(buffer, &iter);
 245         gtk_text_buffer_insert(buffer, &iter, crash_report, -1);
 246
 247         hbuttonbox3 = gtk_button_box_new(GTK_ORIENTATION_HORIZONTAL);
 248         gtk_widget_show(hbuttonbox3);
 249         gtk_box_pack_start(GTK_BOX(vbox1), hbuttonbox3, FALSE, FALSE, 0);
 250
 251         hbuttonbox4 = gtk_button_box_new(GTK_ORIENTATION_HORIZONTAL);
 252         gtk_widget_show(hbuttonbox4);
 253         gtk_box_pack_start(GTK_BOX(vbox1), hbuttonbox4, FALSE, FALSE, 0);
 254
 255         button3 = gtk_button_new_with_label(_("Close"));
 256         gtk_widget_show(button3);
 257         gtk_container_add(GTK_CONTAINER(hbuttonbox4), button3);
 258         gtk_widget_set_can_default(button3, TRUE);
 259
 260         button4 = gtk_button_new_with_label(_("Save..."));
 261         gtk_widget_show(button4);
 262         gtk_container_add(GTK_CONTAINER(hbuttonbox4), button4);
 263         gtk_widget_set_can_default(button4, TRUE);
 264
 265         button5 = gtk_button_new_with_label(_("Create bug report"));
 266         gtk_widget_show(button5);
 267         gtk_container_add(GTK_CONTAINER(hbuttonbox4), button5);
 268         gtk_widget_set_can_default(button5, TRUE);
 269
 270         g_signal_connect(G_OBJECT(window1), "delete_event",
 271                          G_CALLBACK(gtk_main_quit), NULL);
 272         g_signal_connect(G_OBJECT(button3),   "clicked",
 273                          G_CALLBACK(gtk_main_quit), NULL);
 274         g_signal_connect(G_OBJECT(button4), "clicked",
 275                          G_CALLBACK(crash_save_crash_log), crash_report);
 276         g_signal_connect(G_OBJECT(button5), "clicked",
 277                          G_CALLBACK(crash_create_bug_report), NULL);
 278
 279         MANAGE_WINDOW_SIGNALS_CONNECT(window1);
 280
 281         gtk_widget_show(window1);
 282
 283         gtk_main();
 284         return window1;
 285 }
 286
 287
 288 /*!
 289  *\brief        create debugger script file in claws directory.
 290  *              all the other options (creating temp files) looked too
 291  *              convoluted.
 292  */
 293 static void crash_create_debugger_file(void)
 294 {
 295         gchar *filespec = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S, DEBUGGERRC, NULL);
 296
 297         str_write_to_file(DEBUG_SCRIPT, filespec, TRUE);
 298         g_free(filespec);
 299 }
 300
 301 /*!
 302  *\brief        saves crash log to a file
 303  */
 304 static void crash_save_crash_log(GtkButton *button, const gchar *text)
 305 {
 306         time_t timer;
 307         struct tm *lt;
 308         char buf[100];
 309         struct tm buft;
 310         gchar *filename;
 311
 312         timer = time(NULL);
 313         lt = localtime_r(&timer, &buft);
 314         strftime(buf, sizeof buf, "claws-crash-log-%Y-%m-%d-%H-%M-%S.txt", lt);
 315         if (NULL != (filename = filesel_select_file_save(_("Save crash information"), buf))
 316         &&  *filename)
 317                 str_write_to_file(text, filename, TRUE);
 318         g_free(filename);
 319 }
 320
 321 /*!
 322  *\brief        create bug report (goes to Claws Mail bug tracker)
 323  */
 324 static void crash_create_bug_report(GtkButton *button, const gchar *data)
 325 {
 326         open_uri(BUGZILLA_URI, prefs_common_get_uri_cmd());
 327 }
 328
 329 /*!
 330  *\brief        launches debugger and attaches it to crashed claws
 331  */
 332 static void crash_debug(unsigned long crash_pid,
 333                         gchar *exe_image,
 334                         GString *debug_output)
 335 {
 336         int choutput[2];
 337         pid_t pid;
 338
 339         if (pipe(choutput) == -1) {
 340                 g_print("can't pipe - error %s", g_strerror(errno));
 341                 return;
 342         }
 343
 344         if (0 == (pid = fork())) {
 345                 char *argp[10];
 346                 char **argptr = argp;
 347                 gchar *filespec = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S, DEBUGGERRC, NULL);
 348
 349                 if (setgid(getgid()) != 0)
 350                         perror("setgid");
 351                 if (setuid(getuid()) != 0)
 352                         perror("setuid");
 353
 354                 /*
 355                  * setup debugger to attach to crashed claws
 356                  */
 357                 *argptr++ = "gdb";
 358                 *argptr++ = "--nw";
 359                 *argptr++ = "--nx";
 360                 *argptr++ = "--quiet";
 361                 *argptr++ = "--batch";
 362                 *argptr++ = "-x";
 363                 *argptr++ = filespec;
 364                 *argptr++ = exe_image;
 365                 *argptr++ = g_strdup_printf("%ld", crash_pid);
 366                 *argptr   = NULL;
 367
 368                 /*
 369                  * redirect output to write end of pipe
 370                  */
 371                 close(1);
 372                 if (dup(choutput[1]) < 0)
 373                         perror("dup");
 374                 close(choutput[0]);
 375                 if (-1 == execvp("gdb", argp))
 376                         perror("execvp");
 377         } else {
 378                 char buf[100];
 379                 int r;
 380
 381                 waitpid(pid, NULL, 0);
 382
 383                 /*
 384                  * make it non blocking
 385                  */
 386                 if (-1 == fcntl(choutput[0], F_SETFL, O_NONBLOCK))
 387                         g_print("set to non blocking failed\n");
 388
 389                 /*
 390                  * get the output
 391                  */
 392                 do {
 393                         r = read(choutput[0], buf, sizeof buf - 1);
 394                         if (r > 0) {
 395                                 buf[r] = 0;
 396                                 g_string_append(debug_output, buf);
 397                         }
 398                 } while (r > 0);
 399
 400                 close(choutput[0]);
 401                 close(choutput[1]);
 402
 403                 /*
 404                  * kill the process we attached to
 405                  */
 406                 kill(crash_pid, SIGCONT);
 407         }
 408 }
 409
 410 /***/
 411
 412 /*!
 413  *\brief        features
 414  */
 415 static gchar *get_compiled_in_features(void)
 416 {
 417         return g_strdup_printf("%s",
 418 #if INET6
 419                    " IPv6"
 420 #endif
 421 #if HAVE_ICONV
 422                    " iconv"
 423 #endif
 424 #if HAVE_LIBCOMPFACE
 425                    " compface"
 426 #endif
 427 #if USE_GNUTLS
 428                    " GnuTLS"
 429 #endif
 430 #if USE_LDAP
 431                    " LDAP"
 432 #endif
 433 #if USE_JPILOT
 434                    " JPilot"
 435 #endif
 436 #if USE_ENCHANT
 437                    " GNU/aspell"
 438 #endif
 439 #if HAVE_LIBETPAN
 440                    " libetpan"
 441 #endif
 442 #if HAVE_LIBSM
 443                    " libSM"
 444 #endif
 445         "");
 446 }
 447
 448 /***/
 449
 450 /*!
 451  *\brief        library version
 452  */
 453 static gchar *get_lib_version(void)
 454 {
 455 #if defined(__UCLIBC__)
 456         return g_strdup_printf("uClibc %i.%i.%i", __UCLIBC_MAJOR__, __UCLIBC_MINOR__, __UCLIBC_SUBLEVEL__);
 457 #elif defined(__GNU_LIBRARY__)
 458         return g_strdup_printf("GNU libc %s", gnu_get_libc_version());
 459 #else
 460         return g_strdup(_("Unknown"));
 461 #endif
 462 }
 463
 464 /***/
 465
 466 /*!
 467  *\brief        operating system
 468  */
 469 static gchar *get_operating_system(void)
 470 {
 471 #if HAVE_SYS_UTSNAME_H
 472         struct utsname utsbuf;
 473         uname(&utsbuf);
 474         return g_strdup_printf("%s %s (%s)",
 475                                utsbuf.sysname,
 476                                utsbuf.release,
 477                                utsbuf.machine);
 478 #else
 479         return g_strdup(_("Unknown"));
 480
 481 #endif
 482 }
 483
 484 /***/
 485
 486 /*!
 487  *\brief        see if the crash dialog is allowed (because some
 488  *              developers may prefer to run Claws Mail under gdb...)
 489  */
 490 static gboolean is_crash_dialog_allowed(void)
 491 {
 492         return !g_getenv("CLAWS_NO_CRASH");
 493 }
 494
 495 /*!
 496  *\brief        this handler will probably evolve into
 497  *              something better.
 498  */
 499 static void crash_handler(int sig)
 500 {
 501         pid_t pid;
 502         static volatile unsigned long crashed_ = 0;
 503
 504         /*
 505          * let's hope argv0 aren't trashed.
 506          * both are defined in main.c.
 507          */
 508         extern gchar *argv0;
 509
 510
 511         /*
 512          * besides guarding entrancy it's probably also better
 513          * to mask off signals
 514          */
 515         if (crashed_) return;
 516
 517         crashed_++;
 518
 519 #ifdef SIGTERM
 520         if (sig == SIGTERM)
 521                 clean_quit(NULL);
 522 #endif
 523
 524         /*
 525          * gnome ungrabs focus, and flushes gdk. mmmh, good idea.
 526          */
 527         gdk_pointer_ungrab(GDK_CURRENT_TIME);
 528         gdk_keyboard_ungrab(GDK_CURRENT_TIME);
 529         gdk_flush();
 530
 531         if (0 == (pid = fork())) {
 532                 char buf[50];
 533                 char *args[5];
 534
 535                 /*
 536                  * probably also some other parameters (like GTK ones).
 537                  * also we pass the full startup dir and the real command
 538                  * line typed in (argv0)
 539                  */
 540                 args[0] = argv0;
 541                 args[1] = "--debug";
 542                 args[2] = "--crash";
 543                 sprintf(buf, "%d,%d,%s", getppid(), sig, argv0);
 544                 args[3] = buf;
 545                 args[4] = NULL;
 546
 547                 if (chdir(claws_get_startup_dir()) != 0)
 548                         FILE_OP_ERROR(claws_get_startup_dir(), "chdir");
 549                 if (setgid(getgid()) != 0)
 550                         perror("setgid");
 551                 if (setuid(getuid()) != 0 )
 552                         perror("setuid");
 553                 execvp(argv0, args);
 554                 perror("execvp");
 555         } else {
 556                 waitpid(pid, NULL, 0);
 557                 crash_cleanup_exit();
 558                 _exit(253);
 559         }
 560
 561         _exit(253);
 562 }
 563
 564 /*!
 565  *\brief        put all the things here we can do before
 566  *              letting the program die
 567  */
 568 static void crash_cleanup_exit(void)
 569 {
 570         const char *filename = claws_get_socket_name();
 571         claws_unlink(filename);
 572 }
 573
 574 #endif