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/*
CCpp.cpp - the hook for C/C++ crashing program
Copyright (C) 2009 Zdenek Prikryl (zprikryl@redhat.com)
Copyright (C) 2009 RedHat inc.
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.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "DebugDump.h"
#include "ABRTException.h"
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#include <time.h>
#include <syslog.h>
#include <string>
#define FILENAME_EXECUTABLE "executable"
#define FILENAME_CMDLINE "cmdline"
#define FILENAME_COREDUMP "coredump"
static void write_success_log(const char* pid)
{
openlog("abrt", 0, LOG_DAEMON);
syslog(LOG_WARNING, "CCpp Language Hook: Crashed pid: %s", pid);
closelog();
}
static void write_faliure_log(const char* msg)
{
openlog("abrt", 0, LOG_DAEMON);
syslog(LOG_WARNING, "CCpp Language Hook: Exception occur: %s", msg);
closelog();
}
char* get_executable(const char* pid)
{
char path[PATH_MAX];
char executable[PATH_MAX];
int len;
snprintf(path, sizeof(path), "/proc/%s/exe", pid);
if ((len = readlink(path, executable, PATH_MAX)) != -1)
{
executable[len] = '\0';
return strdup(executable);
}
return NULL;
}
// taken from kernel
#define COMMAND_LINE_SIZE 2048
char* get_cmdline(const char* pid)
{
char path[PATH_MAX];
char cmdline[COMMAND_LINE_SIZE];
snprintf(path, sizeof(path), "/proc/%s/cmdline", pid);
FILE* fp = fopen(path, "r");
int ch;
int ii = 0;
while ((ch = fgetc(fp)) != EOF)
{
if (ch == 0)
{
cmdline[ii] = ' ';
}
else if (isspace(ch) || (isascii(ch) && !iscntrl(ch)))
{
cmdline[ii] = ch;
}
ii++;
}
cmdline[ii] = '\0';
fclose(fp);
return strdup(cmdline);
}
int main(int argc, char** argv)
{
const char* program_name = argv[0];
if (argc < 3)
{
fprintf(stderr, "Usage: %s: <dddir> <pid> <signal> <uid>\n",
program_name);
return -1;
}
const char* dddir = argv[1];
const char* pid = argv[2];
const char* signal = argv[3];
const char* uid = argv[4];
if (strcmp(signal, "3") != 0 && // SIGQUIT
strcmp(signal, "4") != 0 && // SIGILL
strcmp(signal, "6") != 0 && // SIGABRT
strcmp(signal, "8") != 0 && // SIGFPE
strcmp(signal, "11") != 0) // SIGSEGV
{
return 0;
}
try
{
FILE* fp;
CDebugDump dd;
int byte;
char path[PATH_MAX];
char* executable = NULL;
char* cmdline = NULL;
executable = get_executable(pid);
cmdline = get_cmdline(pid);
if (executable == NULL ||
cmdline == NULL)
{
free(executable);
free(cmdline);
throw CABRTException(EXCEP_FATAL, "Can not get proc info.");
}
snprintf(path, sizeof(path), "%s/ccpp-%ld-%s", dddir, time(NULL), pid);
dd.Create(path);
dd.SaveText(FILENAME_ANALYZER, "CCpp");
dd.SaveText(FILENAME_EXECUTABLE, executable);
dd.SaveText(FILENAME_UID, uid);
dd.SaveText(FILENAME_CMDLINE, cmdline);
snprintf(path + strlen(path), sizeof(path), "/%s", FILENAME_COREDUMP);
if ((fp = fopen(path, "w")) == NULL)
{
dd.Delete();
dd.Close();
throw CABRTException(EXCEP_FATAL, std::string("Can not open the file ") + path);
}
// TODO: rewrite this
while ((byte = getc(stdin)) != EOF)
{
if (putc(byte, fp) == EOF)
{
fclose(fp);
dd.Delete();
dd.Close();
throw CABRTException(EXCEP_FATAL, "Can not write to the file %s.");
}
}
free(executable);
free(cmdline);
fclose(fp);
dd.Close();
write_success_log(pid);
}
catch (std::exception& e)
{
fprintf(stderr, "%s: %s\n", program_name, e.what());
write_faliure_log(e.what());
return -2;
}
return 0;
}
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