You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
528 lines
13 KiB
528 lines
13 KiB
/*
|
|
* This file is part of the KDE Libraries
|
|
* Copyright (C) 2000 Timo Hummel <timo.hummel@sap.com>
|
|
* Tom Braun <braunt@fh-konstanz.de>
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public License
|
|
* along with this library; see the file COPYING.LIB. If not, write to
|
|
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
/*
|
|
* This file is used to catch signals which would normally
|
|
* crash the application (like segmentation fault, floating
|
|
* point exception and such).
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <string.h>
|
|
#include <signal.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <time.h>
|
|
#include "kcrash.h"
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/time.h>
|
|
#include <sys/resource.h>
|
|
#include <sys/wait.h>
|
|
#include <sys/un.h>
|
|
#include <sys/socket.h>
|
|
#include <errno.h>
|
|
|
|
#include <tqwindowdefs.h>
|
|
#include <kglobal.h>
|
|
#include <kinstance.h>
|
|
#include <kaboutdata.h>
|
|
#include <kdebug.h>
|
|
#include <kapplication.h>
|
|
#include <dcopclient.h>
|
|
|
|
#include <../kinit/klauncher_cmds.h>
|
|
|
|
#if defined Q_WS_X11
|
|
#include <X11/Xlib.h>
|
|
#endif
|
|
|
|
KCrash::HandlerType KCrash::_emergencySaveFunction = 0;
|
|
KCrash::HandlerType KCrash::_crashHandler = 0;
|
|
const char *KCrash::appName = 0;
|
|
const char *KCrash::appPath = 0;
|
|
bool KCrash::safer = false;
|
|
|
|
// This function sets the function which should be called when the
|
|
// application crashes and the
|
|
// application is asked to try to save its data.
|
|
void
|
|
KCrash::setEmergencySaveFunction (HandlerType saveFunction)
|
|
{
|
|
_emergencySaveFunction = saveFunction;
|
|
|
|
/*
|
|
* We need at least the default crash handler for
|
|
* emergencySaveFunction to be called
|
|
*/
|
|
if (_emergencySaveFunction && !_crashHandler)
|
|
_crashHandler = defaultCrashHandler;
|
|
}
|
|
|
|
|
|
// This function sets the function which should be responsible for
|
|
// the application crash handling.
|
|
void
|
|
KCrash::setCrashHandler (HandlerType handler)
|
|
{
|
|
#ifdef Q_OS_UNIX
|
|
if (!handler)
|
|
handler = SIG_DFL;
|
|
|
|
sigset_t mask;
|
|
sigemptyset(&mask);
|
|
|
|
#ifdef SIGSEGV
|
|
signal (SIGSEGV, handler);
|
|
sigaddset(&mask, SIGSEGV);
|
|
#endif
|
|
#ifdef SIGFPE
|
|
signal (SIGFPE, handler);
|
|
sigaddset(&mask, SIGFPE);
|
|
#endif
|
|
#ifdef SIGILL
|
|
signal (SIGILL, handler);
|
|
sigaddset(&mask, SIGILL);
|
|
#endif
|
|
#ifdef SIGABRT
|
|
signal (SIGABRT, handler);
|
|
sigaddset(&mask, SIGABRT);
|
|
#endif
|
|
|
|
sigprocmask(SIG_UNBLOCK, &mask, 0);
|
|
#endif //Q_OS_UNIX
|
|
|
|
_crashHandler = handler;
|
|
}
|
|
|
|
void
|
|
KCrash::defaultCrashHandler (int sig)
|
|
{
|
|
#ifdef Q_OS_UNIX
|
|
// WABA: Do NOT use kdDebug() in this function because it is much too risky!
|
|
// Handle possible recursions
|
|
static int crashRecursionCounter = 0;
|
|
crashRecursionCounter++; // Nothing before this, please !
|
|
|
|
signal(SIGALRM, SIG_DFL);
|
|
alarm(3); // Kill me... (in case we deadlock in malloc)
|
|
|
|
if (crashRecursionCounter < 2) {
|
|
if (_emergencySaveFunction) {
|
|
_emergencySaveFunction (sig);
|
|
}
|
|
crashRecursionCounter++; //
|
|
}
|
|
|
|
// Close all remaining file descriptors except for stdin/stdout/stderr
|
|
struct rlimit rlp;
|
|
getrlimit(RLIMIT_NOFILE, &rlp);
|
|
for (int i = 3; i < (int)rlp.rlim_cur; i++)
|
|
close(i);
|
|
|
|
|
|
// this code is leaking, but this should not hurt cause we will do a
|
|
// exec() afterwards. exec() is supposed to clean up.
|
|
if (crashRecursionCounter < 3)
|
|
{
|
|
if (appName)
|
|
{
|
|
#ifndef NDEBUG
|
|
fprintf(stderr, "KCrash: crashing... crashRecursionCounter = %d\n", crashRecursionCounter);
|
|
fprintf(stderr, "KCrash: Application Name = %s path = %s pid = %d\n", appName ? appName : "<unknown>" , appPath ? appPath : "<unknown>", getpid());
|
|
#else
|
|
fprintf(stderr, "KCrash: Application '%s' crashing...\n", appName ? appName : "<unknown>");
|
|
#endif
|
|
|
|
const char * argv[24]; // don't forget to update this
|
|
int i = 0;
|
|
|
|
// argument 0 has to be drkonqi
|
|
argv[i++] = "drkonqi";
|
|
|
|
#if defined Q_WS_X11
|
|
// start up on the correct display
|
|
argv[i++] = "-display";
|
|
if ( qt_xdisplay() )
|
|
argv[i++] = XDisplayString(qt_xdisplay());
|
|
else
|
|
argv[i++] = getenv("DISPLAY");
|
|
#elif defined(Q_WS_QWS)
|
|
// start up on the correct display
|
|
argv[i++] = "-display";
|
|
argv[i++] = getenv("QWS_DISPLAY");
|
|
#endif
|
|
|
|
// we have already tested this
|
|
argv[i++] = "--appname";
|
|
argv[i++] = appName;
|
|
if (KApplication::loadedByKdeinit)
|
|
argv[i++] = "--tdeinit";
|
|
|
|
// only add apppath if it's not NULL
|
|
if (appPath) {
|
|
argv[i++] = "--apppath";
|
|
argv[i++] = appPath;
|
|
}
|
|
|
|
// signal number -- will never be NULL
|
|
char sigtxt[ 10 ];
|
|
sprintf( sigtxt, "%d", sig );
|
|
argv[i++] = "--signal";
|
|
argv[i++] = sigtxt;
|
|
|
|
char pidtxt[ 10 ];
|
|
sprintf( pidtxt, "%d", getpid());
|
|
argv[i++] = "--pid";
|
|
argv[i++] = pidtxt;
|
|
|
|
const KInstance *instance = KGlobal::_instance;
|
|
const KAboutData *about = instance ? instance->aboutData() : 0;
|
|
if (about) {
|
|
if (about->internalVersion()) {
|
|
argv[i++] = "--appversion";
|
|
argv[i++] = about->internalVersion();
|
|
}
|
|
|
|
if (about->internalProgramName()) {
|
|
argv[i++] = "--programname";
|
|
argv[i++] = about->internalProgramName();
|
|
}
|
|
|
|
if (about->internalBugAddress()) {
|
|
argv[i++] = "--bugaddress";
|
|
argv[i++] = about->internalBugAddress();
|
|
}
|
|
}
|
|
|
|
if ( kapp && !kapp->startupId().isNull()) {
|
|
argv[i++] = "--startupid";
|
|
argv[i++] = kapp->startupId().data();
|
|
}
|
|
|
|
if ( safer )
|
|
argv[i++] = "--safer";
|
|
|
|
// NULL terminated list
|
|
argv[i] = NULL;
|
|
|
|
startDrKonqi( argv, i );
|
|
_exit(253);
|
|
|
|
}
|
|
else {
|
|
fprintf(stderr, "Unknown appname\n");
|
|
}
|
|
}
|
|
|
|
if (crashRecursionCounter < 4)
|
|
{
|
|
fprintf(stderr, "Unable to start Dr. Konqi\n");
|
|
}
|
|
#endif //Q_OS_UNIX
|
|
|
|
_exit(255);
|
|
}
|
|
|
|
#ifdef Q_OS_UNIX
|
|
|
|
// Since we can't fork() in the crashhandler, we cannot execute any external code
|
|
// (there can be functions registered to be performed before fork(), for example
|
|
// handling of malloc locking, which doesn't work when malloc crashes because of heap corruption).
|
|
|
|
static int write_socket(int sock, char *buffer, int len);
|
|
static int read_socket(int sock, char *buffer, int len);
|
|
static int openSocket();
|
|
|
|
void KCrash::startDrKonqi( const char* argv[], int argc )
|
|
{
|
|
int socket = openSocket();
|
|
if( socket < -1 )
|
|
{
|
|
startDirectly( argv, argc );
|
|
return;
|
|
}
|
|
klauncher_header header;
|
|
header.cmd = LAUNCHER_EXEC_NEW;
|
|
const int BUFSIZE = 8192; // make sure this is big enough
|
|
char buffer[ BUFSIZE + 10 ];
|
|
int pos = 0;
|
|
long argcl = argc;
|
|
memcpy( buffer + pos, &argcl, sizeof( argcl ));
|
|
pos += sizeof( argcl );
|
|
for( int i = 0;
|
|
i < argc;
|
|
++i )
|
|
{
|
|
int len = strlen( argv[ i ] ) + 1; // include terminating \0
|
|
if( pos + len > BUFSIZE )
|
|
{
|
|
fprintf( stderr, "BUFSIZE in KCrash not big enough!\n" );
|
|
startDirectly( argv, argc );
|
|
return;
|
|
}
|
|
memcpy( buffer + pos, argv[ i ], len );
|
|
pos += len;
|
|
}
|
|
long env = 0;
|
|
memcpy( buffer + pos, &env, sizeof( env ));
|
|
pos += sizeof( env );
|
|
long avoid_loops = 0;
|
|
memcpy( buffer + pos, &avoid_loops, sizeof( avoid_loops ));
|
|
pos += sizeof( avoid_loops );
|
|
header.arg_length = pos;
|
|
write_socket(socket, (char *) &header, sizeof(header));
|
|
write_socket(socket, buffer, pos);
|
|
if( read_socket( socket, (char *) &header, sizeof(header)) < 0
|
|
|| header.cmd != LAUNCHER_OK )
|
|
{
|
|
startDirectly( argv, argc );
|
|
return;
|
|
}
|
|
long pid;
|
|
read_socket(socket, buffer, header.arg_length);
|
|
pid = 0;
|
|
for (int k=0;k<sizeof(long);k++) {
|
|
pid = pid | (buffer[k] << ((sizeof(long)-1-k)*8));
|
|
}
|
|
|
|
alarm(0); // Seems we made it....
|
|
|
|
for(;;)
|
|
{
|
|
if( kill( pid, 0 ) < 0 )
|
|
_exit(253);
|
|
sleep(1);
|
|
// the debugger should stop this process anyway
|
|
}
|
|
}
|
|
|
|
// If we can't reach tdeinit we can still at least try to fork()
|
|
void KCrash::startDirectly( const char* argv[], int )
|
|
{
|
|
fprintf( stderr, "KCrash cannot reach tdeinit, launching directly.\n" );
|
|
pid_t pid = fork();
|
|
if (pid <= 0)
|
|
{
|
|
if(!geteuid() && setgid(getgid()) < 0)
|
|
_exit(253);
|
|
if(!geteuid() && setuid(getuid()) < 0)
|
|
_exit(253);
|
|
execvp("drkonqi", const_cast< char** >( argv ));
|
|
_exit(errno);
|
|
}
|
|
else
|
|
{
|
|
alarm(0); // Seems we made it....
|
|
// wait for child to exit
|
|
waitpid(pid, NULL, 0);
|
|
_exit(253);
|
|
}
|
|
}
|
|
|
|
// From now on this code is copy&pasted from kinit/wrapper.c :
|
|
|
|
extern char **environ;
|
|
|
|
static char *getDisplay()
|
|
{
|
|
const char *display;
|
|
char *result;
|
|
char *screen;
|
|
char *colon;
|
|
char *i;
|
|
/*
|
|
don't test for a value from tqglobal.h but instead distinguish
|
|
Qt/X11 from Qt/Embedded by the fact that Qt/E apps have -DQWS
|
|
on the commandline (which in tqglobal.h however triggers Q_WS_QWS,
|
|
but we don't want to include that here) (Simon)
|
|
#ifdef Q_WS_X11
|
|
*/
|
|
#if !defined(QWS)
|
|
display = getenv("DISPLAY");
|
|
#else
|
|
display = getenv("QWS_DISPLAY");
|
|
#endif
|
|
if (!display || !*display)
|
|
{
|
|
display = ":0";
|
|
}
|
|
result = (char*)malloc(strlen(display)+1);
|
|
if (result == NULL)
|
|
return NULL;
|
|
|
|
strcpy(result, display);
|
|
screen = strrchr(result, '.');
|
|
colon = strrchr(result, ':');
|
|
if (screen && (screen > colon))
|
|
*screen = '\0';
|
|
while((i = strchr(result, ':')))
|
|
*i = '_';
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* Write 'len' bytes from 'buffer' into 'sock'.
|
|
* returns 0 on success, -1 on failure.
|
|
*/
|
|
static int write_socket(int sock, char *buffer, int len)
|
|
{
|
|
ssize_t result;
|
|
int bytes_left = len;
|
|
while ( bytes_left > 0)
|
|
{
|
|
result = write(sock, buffer, bytes_left);
|
|
if (result > 0)
|
|
{
|
|
buffer += result;
|
|
bytes_left -= result;
|
|
}
|
|
else if (result == 0)
|
|
return -1;
|
|
else if ((result == -1) && (errno != EINTR) && (errno != EAGAIN))
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Read 'len' bytes from 'sock' into 'buffer'.
|
|
* returns 0 on success, -1 on failure.
|
|
*/
|
|
static int read_socket(int sock, char *buffer, int len)
|
|
{
|
|
ssize_t result;
|
|
int bytes_left = len;
|
|
while ( bytes_left > 0)
|
|
{
|
|
result = read(sock, buffer, bytes_left);
|
|
if (result > 0)
|
|
{
|
|
buffer += result;
|
|
bytes_left -= result;
|
|
}
|
|
else if (result == 0)
|
|
return -1;
|
|
else if ((result == -1) && (errno != EINTR) && (errno != EAGAIN))
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int openSocket()
|
|
{
|
|
kde_socklen_t socklen;
|
|
int s;
|
|
struct sockaddr_un server;
|
|
#define MAX_SOCK_FILE 255
|
|
char sock_file[MAX_SOCK_FILE + 1];
|
|
const char *home_dir = getenv("HOME");
|
|
const char *kde_home = getenv("TDEHOME");
|
|
char *display;
|
|
|
|
sock_file[0] = sock_file[MAX_SOCK_FILE] = 0;
|
|
|
|
if (!kde_home || !kde_home[0])
|
|
{
|
|
kde_home = "~/.trinity/";
|
|
}
|
|
|
|
if (kde_home[0] == '~')
|
|
{
|
|
if (!home_dir || !home_dir[0])
|
|
{
|
|
fprintf(stderr, "Warning: $HOME not set!\n");
|
|
return -1;
|
|
}
|
|
if (strlen(home_dir) > (MAX_SOCK_FILE-100))
|
|
{
|
|
fprintf(stderr, "Warning: Home directory path too long!\n");
|
|
return -1;
|
|
}
|
|
kde_home++;
|
|
strncpy(sock_file, home_dir, MAX_SOCK_FILE);
|
|
}
|
|
strncat(sock_file, kde_home, MAX_SOCK_FILE - strlen(sock_file));
|
|
|
|
/** Strip trailing '/' **/
|
|
if ( sock_file[strlen(sock_file)-1] == '/')
|
|
sock_file[strlen(sock_file)-1] = 0;
|
|
|
|
strncat(sock_file, "/socket-", MAX_SOCK_FILE - strlen(sock_file));
|
|
if( getenv("XAUTHLOCALHOSTNAME"))
|
|
strncat(sock_file, getenv("XAUTHLOCALHOSTNAME"), MAX_SOCK_FILE - strlen(sock_file) - 1);
|
|
else if (gethostname(sock_file+strlen(sock_file), MAX_SOCK_FILE - strlen(sock_file) - 1) != 0)
|
|
{
|
|
perror("Warning: Could not determine hostname: ");
|
|
return -1;
|
|
}
|
|
sock_file[sizeof(sock_file)-1] = '\0';
|
|
|
|
/* append $DISPLAY */
|
|
display = getDisplay();
|
|
if (display == NULL)
|
|
{
|
|
fprintf(stderr, "Error: Could not determine display.\n");
|
|
return -1;
|
|
}
|
|
|
|
if (strlen(sock_file)+strlen(display)+strlen("/tdeinit_")+2 > MAX_SOCK_FILE)
|
|
{
|
|
fprintf(stderr, "Warning: Socket name will be too long.\n");
|
|
free(display);
|
|
return -1;
|
|
}
|
|
strcat(sock_file, "/tdeinit_");
|
|
strcat(sock_file, display);
|
|
free(display);
|
|
|
|
if (strlen(sock_file) >= sizeof(server.sun_path))
|
|
{
|
|
fprintf(stderr, "Warning: Path of socketfile exceeds UNIX_PATH_MAX.\n");
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* create the socket stream
|
|
*/
|
|
s = socket(PF_UNIX, SOCK_STREAM, 0);
|
|
if (s < 0)
|
|
{
|
|
perror("Warning: socket() failed: ");
|
|
return -1;
|
|
}
|
|
|
|
server.sun_family = AF_UNIX;
|
|
strcpy(server.sun_path, sock_file);
|
|
socklen = sizeof(server);
|
|
if(connect(s, (struct sockaddr *)&server, socklen) == -1)
|
|
{
|
|
perror("Warning: connect() failed: ");
|
|
close(s);
|
|
return -1;
|
|
}
|
|
return s;
|
|
}
|
|
|
|
#endif // Q_OS_UNIX
|