+/*
+ * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
+ * Copyright (C) 2002 by the Sylpheed Claws Team and Hiroyuki Yamamoto
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <glib.h>
+#include <gtk/gtk.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <signal.h>
+
+#include <errno.h>
+#include <fcntl.h>
+
+#include "intl.h"
+#include "crash.h"
+#include "utils.h"
+#include "prefs.h"
+
+static void crash_handler (int sig);
+static gboolean is_crash_dialog_allowed (void);
+static void crash_debug (unsigned long crash_pid, GString *string);
+static gboolean crash_create_debugger_file (void);
+
+static const gchar *DEBUG_SCRIPT = "bt full\nq";
+
+/***/
+
+GtkWidget *crash_dialog_new (const gchar *text, const gchar *debug_output)
+{
+ GtkWidget *window1;
+ GtkWidget *vbox1;
+ GtkWidget *label1;
+ GtkWidget *scrolledwindow1;
+ GtkWidget *text1;
+ GtkWidget *hbuttonbox1;
+ GtkWidget *close;
+ GtkWidget *button3;
+
+ window1 = gtk_window_new(GTK_WINDOW_TOPLEVEL);
+ gtk_object_set_data(GTK_OBJECT(window1), "window1", window1);
+ gtk_window_set_title(GTK_WINDOW(window1), _("Sylpheed Claws - It Bites!"));
+
+ vbox1 = gtk_vbox_new(FALSE, 0);
+ gtk_widget_show(vbox1);
+ gtk_container_add(GTK_CONTAINER(window1), vbox1);
+ gtk_container_set_border_width(GTK_CONTAINER (vbox1), 1);
+
+ label1 = gtk_label_new(text);
+ gtk_widget_show(label1);
+ gtk_box_pack_start(GTK_BOX(vbox1), label1, FALSE, FALSE, 0);
+
+ scrolledwindow1 = gtk_scrolled_window_new(NULL, NULL);
+ gtk_widget_show(scrolledwindow1);
+ gtk_box_pack_start(GTK_BOX(vbox1), scrolledwindow1, TRUE, TRUE, 0);
+ gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolledwindow1),
+ GTK_POLICY_NEVER, GTK_POLICY_ALWAYS);
+
+ text1 = gtk_text_new(NULL, NULL);
+ gtk_text_insert(GTK_TEXT(text1), NULL, NULL, NULL,
+ debug_output, strlen(debug_output));
+ gtk_widget_show(text1);
+ gtk_container_add(GTK_CONTAINER (scrolledwindow1), text1);
+
+ hbuttonbox1 = gtk_hbutton_box_new();
+ gtk_widget_show(hbuttonbox1);
+ gtk_box_pack_start(GTK_BOX(vbox1), hbuttonbox1, FALSE, TRUE, 0);
+ gtk_button_box_set_child_ipadding(GTK_BUTTON_BOX (hbuttonbox1), 5, -1);
+
+ close = gtk_button_new_with_label(_("Close"));
+ gtk_widget_show(close);
+ gtk_container_add(GTK_CONTAINER(hbuttonbox1), close);
+ GTK_WIDGET_SET_FLAGS(close, GTK_CAN_DEFAULT);
+
+ button3 = gtk_button_new_with_label(_("Save..."));
+ gtk_widget_show(button3);
+ gtk_container_add(GTK_CONTAINER(hbuttonbox1), button3);
+ GTK_WIDGET_SET_FLAGS(button3, GTK_CAN_DEFAULT);
+
+ gtk_signal_connect(GTK_OBJECT(window1), "delete_event",
+ GTK_SIGNAL_FUNC(gtk_main_quit), NULL);
+ gtk_signal_connect(GTK_OBJECT(close), "clicked",
+ GTK_SIGNAL_FUNC(gtk_main_quit), NULL);
+
+ gtk_widget_show(window1);
+ gtk_main();
+ return window1;
+}
+
+/***/
+
+void crash_install_handlers(void)
+{
+#if HAVE_GDB
+ sigset_t mask;
+
+ if (!is_crash_dialog_allowed()) return;
+
+ sigemptyset(&mask);
+
+#ifdef SIGSEGV
+ signal(SIGSEGV, crash_handler);
+ sigaddset(&mask, SIGSEGV);
+#endif
+
+#ifdef SIGFPE
+ signal(SIGFPE, crash_handler);
+ sigaddset(&mask, SIGFPE);
+#endif
+
+#ifdef SIGILL
+ signal(SIGILL, crash_handler);
+ sigaddset(&mask, SIGILL);
+#endif
+
+#ifdef SIGABRT
+ signal(SIGABRT, crash_handler);
+ sigaddset(&mask, SIGABRT);
+#endif
+
+ sigprocmask(SIG_UNBLOCK, &mask, 0);
+#endif /* HAVE_GDB */
+}
+
+/***/
+
+/*
+ *\brief crash dialog entry point
+ */
+void crash_main(const char *arg)
+{
+#if HAVE_GDB
+ gchar *text;
+ gchar **tokens;
+ unsigned long pid;
+ GString *output;
+
+ crash_create_debugger_file();
+ tokens = g_strsplit(arg, ",", 0);
+
+ pid = atol(tokens[0]);
+ text = g_strdup_printf("Sylpheed process (%lx) received signal %ld",
+ pid, atol(tokens[1]));
+
+ output = g_string_new("DEBUG LOG\n");
+ crash_debug(pid, output);
+ crash_dialog_new(text, output->str);
+ g_string_free(output, TRUE);
+ g_free(text);
+ g_strfreev(tokens);
+#endif /* HAVE_GDB */
+}
+
+/*
+ *\brief create debugger script file in sylpheed directory.
+ * all the other options (creating temp files) looked too
+ * convoluted.
+ */
+static gboolean crash_create_debugger_file(void)
+{
+ PrefFile *pf;
+ gchar *filespec = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S, DEBUGGERRC, NULL);
+
+ pf = prefs_write_open(filespec);
+ g_free(filespec);
+ if (pf)
+ fprintf(pf->fp, DEBUG_SCRIPT);
+ prefs_write_close(pf);
+}
+
+/*
+ *\brief launches debugger and attaches it to crashed sylpheed
+ */
+static void crash_debug(unsigned long crash_pid, GString *string)
+{
+ int choutput[2];
+ pid_t pid;
+
+ pipe(choutput);
+
+ if (0 == (pid = fork())) {
+ const char *argp[9];
+ const char **argptr = argp;
+ const gchar *cmdline;
+ gchar *filespec = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S, DEBUGGERRC, NULL);
+
+ setgid(getgid());
+ setuid(getuid());
+
+ /*
+ * setup debugger to attach to crashed sylpheed
+ */
+ *argptr++ = "--nw";
+ *argptr++ = "--nx";
+ *argptr++ = "--quiet";
+ *argptr++ = "--batch";
+ *argptr++ = "--command";
+ *argptr++ = g_strdup_printf("%s", filespec);
+ *argptr++ = "sylpheed"; /* program file name */
+ *argptr++ = g_strdup_printf("%d", crash_pid);
+ *argptr = NULL;
+
+ /*
+ * redirect output to write end of pipe
+ */
+ close(1);
+ dup(choutput[1]);
+ close(choutput[0]);
+ if (-1 == execvp("gdb", argp))
+ puts("error execvp\n");
+ } else {
+ char buf[100];
+ int r;
+
+ waitpid(pid, NULL, 0);
+
+ /*
+ * make it non blocking
+ */
+ if (-1 == fcntl(choutput[0], F_SETFL, O_NONBLOCK))
+ puts("set to non blocking failed\n");
+
+ /*
+ * get the output
+ */
+ do {
+ r = read(choutput[0], buf, sizeof buf - 1);
+ if (r > 0) {
+ buf[r] = 0;
+ g_string_append(string, buf);
+ }
+ } while (r > 0);
+
+ close(choutput[0]);
+ close(choutput[1]);
+
+ /*
+ * kill the process we attached to
+ */
+ kill(crash_pid, SIGCONT);
+ }
+}
+
+/*
+ *\brief checks KDE, GNOME and Sylpheed specific variables
+ * to see if the crash dialog is allowed (because some
+ * developers may prefer to run sylpheed under gdb...)
+ */
+static gboolean is_crash_dialog_allowed(void)
+{
+ return getenv("KDE_DEBUG") ||
+ !getenv("GNOME_DISABLE_CRASH_DIALOG") ||
+ !getenv("SYLPHEED_NO_CRASH");
+}
+
+/*
+ *\brief this handler will probably evolve into
+ * something better.
+ */
+static void crash_handler(int sig)
+{
+ pid_t pid;
+ static volatile unsigned long crashed_ = 0;
+
+ /*
+ * besides guarding entrancy it's probably also better
+ * to mask off signals
+ */
+ if (crashed_)
+ return;
+
+ crashed_++;
+
+ /*
+ * gnome ungrabs focus, and flushes gdk. mmmh, good idea.
+ */
+ gdk_pointer_ungrab(GDK_CURRENT_TIME);
+ gdk_keyboard_ungrab(GDK_CURRENT_TIME);
+ gdk_flush();
+
+ if (0 == (pid = fork())) {
+ char buf[50];
+ const char *args[4];
+
+ /*
+ * probably also some other parameters (like GTK+ ones).
+ */
+ args[0] = "--debug";
+ args[1] = "--crash";
+ sprintf(buf, "%ld,%d", getppid(), sig);
+ args[2] = buf;
+ args[3] = NULL;
+
+ setgid(getgid());
+ setuid(getuid());
+#if 0
+ execvp("/alfons/Projects/sylpheed-claws/src/sylpheed", args);
+#else
+ execvp("sylpheed", args);
+#endif
+ } else {
+ waitpid(pid, NULL, 0);
+ _exit(253);
+ }
+
+ _exit(253);
+}
+
projects / claws.git / commitdiff