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/*
abrt-hook-python.cpp - writes data to the /var/cache/abrt directory
with SUID bit
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 <getopt.h>
#include <syslog.h>
// We can easily get rid of abrtlib (libABRTUtils.so) usage in this file,
// but DebugDump will pull it in anyway
#include "abrtlib.h"
#include "hooklib.h"
#include "DebugDump.h"
#include "CrashTypes.h"
#include "ABRTException.h"
#if HAVE_CONFIG_H
# include <config.h>
#endif
#define MAX_BT_SIZE (1024*1024)
#define MAX_BT_SIZE_STR "1 MB"
static char *pid;
static char *executable;
static bool printable_str(const char *str)
{
do {
if ((unsigned char)(*str) < ' ' || *str == 0x7f)
return false;
str++;
} while (*str);
return true;
}
int main(int argc, char** argv)
{
// Parse options
static const struct option longopts[] = {
// name , has_arg , flag, val
{ "pid" , required_argument, NULL, 'p' },
{ "executable", required_argument, NULL, 'e' },
{ 0 },
};
int opt;
while ((opt = getopt_long(argc, argv, "p:e:u:l:", longopts, NULL)) != -1)
{
switch (opt)
{
case 'p':
pid = optarg;
break;
case 'e':
executable = optarg;
break;
default:
usage:
error_msg_and_die(
"Usage: abrt-hook-python [OPTIONS] <BACKTRACE\n"
"\nOptions:\n"
" -p,--pid PID PID of process that caused the crash\n"
" -p,--executable PATH absolute path to the program that crashed\n"
);
}
}
if (!pid || !executable)
goto usage;
if (strlen(executable) > PATH_MAX || !printable_str(executable))
goto usage;
// pid string is sanitized later by xatou()
openlog("abrt", LOG_PID, LOG_DAEMON);
logmode = LOGMODE_SYSLOG;
// Error if daemon is not running
if (!daemon_is_ok())
error_msg_and_die("daemon is not running, python crash dump aborted");
unsigned setting_MaxCrashReportsSize = 0;
parse_conf(NULL, &setting_MaxCrashReportsSize, NULL);
if (setting_MaxCrashReportsSize > 0)
{
check_free_space(setting_MaxCrashReportsSize);
}
// Read the backtrace from stdin
char *bt = (char*)xmalloc(MAX_BT_SIZE);
ssize_t len = full_read(STDIN_FILENO, bt, MAX_BT_SIZE-1);
if (len < 0)
{
perror_msg_and_die("read error");
}
bt[len] = '\0';
if (len == MAX_BT_SIZE-1)
{
error_msg("backtrace size limit exceeded, trimming to " MAX_BT_SIZE_STR);
}
// This also checks that pid is a valid numeric string
char *cmdline = get_cmdline(xatou(pid)); // never NULL
// Create directory with the debug dump
char path[PATH_MAX];
unsigned path_len = snprintf(path, sizeof(path), DEBUG_DUMPS_DIR"/pyhook-%ld-%s.new",
(long)time(NULL), pid);
if (path_len >= sizeof(path))
exit(1);
CDebugDump dd;
try {
dd.Create(path, getuid());
} catch (CABRTException &e) {
dd.Delete();
dd.Close();
error_msg_and_die("error while creating crash dump %s: %s", path, e.what());
}
dd.SaveText(FILENAME_ANALYZER, "Python");
dd.SaveText(FILENAME_EXECUTABLE, executable);
dd.SaveText(FILENAME_BACKTRACE, bt);
// python handler puts a short(er) crash descr in 1st line. Example:
// "CCMainWindow.py:1:<module>:ZeroDivisionError: integer division or modulo by zero"
strchrnul(bt, '\n')[0] = '\0';
dd.SaveText(FILENAME_REASON, bt);
free(bt);
dd.SaveText(FILENAME_CMDLINE, cmdline);
free(cmdline);
char uid[sizeof(long) * 3 + 2];
sprintf(uid, "%lu", (long)getuid());
dd.SaveText(CD_UID, uid);
dd.Close();
char *newpath = xstrndup(path, path_len - (sizeof(".new")-1));
if (rename(path, newpath) != 0)
strcpy(path, newpath);
free(newpath);
log("saved python crash dump of pid %s to %s", pid, path);
if (setting_MaxCrashReportsSize > 0)
{
trim_debug_dumps(setting_MaxCrashReportsSize, path);
}
return 0;
}
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