void __guard_setup(void)
{
size_t size;
if (__guard != 0UL)
return;
/* Start with the "terminator canary". */
__guard = 0xFF0A0D00UL;
#ifndef __SSP_QUICK_CANARY__
# ifdef __SSP_USE_ERANDOM__
{
int mib[3];
/* Random is another depth in Linux, hence an array of 3. */
mib[0] = CTL_KERN;
mib[1] = KERN_RANDOM;
mib[2] = RANDOM_ERANDOM;
size = sizeof(unsigned long);
if (__sysctl(mib, 3, &__guard, &size, NULL, 0) != (-1))
if (__guard != 0UL)
return;
}
# endif /* ifdef __SSP_USE_ERANDOM__ */
/*
* Attempt to open kernel pseudo random device if one exists before
* opening urandom to avoid system entropy depletion.
*/
{
int fd;
# ifdef __SSP_USE_ERANDOM__
if ((fd = __libc_open("/dev/erandom", O_RDONLY)) == (-1))
# endif
fd = __libc_open("/dev/urandom", O_RDONLY);
if (fd != (-1)) {
size = __libc_read(fd, (char *) &__guard, sizeof(__guard));
__libc_close(fd);
if (size == sizeof(__guard))
return;
}
}
#endif /* ifndef __SSP_QUICK_CANARY__ */
/* Everything failed? Or we are using a weakened model of the
* terminator canary */
{
struct timeval tv;
__gettimeofday(&tv, NULL);
__guard ^= tv.tv_usec ^ tv.tv_sec;
}
}
FILE *fopen_unlocked(const char *path, const char *mode) {
int f=0; /* O_RDONLY, O_WRONLY or O_RDWR */
int fd;
f=__stdio_parse_mode(mode);
if ((fd=__libc_open(path,f,0666))<0)
return 0;
return __stdio_init_file(fd,1,f);
}
int creat(const char *file, mode_t mode)
{
return __libc_open(file, O_WRONLY | O_CREAT | O_TRUNC, mode);
}
void __libc_vsyslog(int priority, const char *format, va_list arg_ptr)
{
char buffer[BUF_SIZE];
char time_buf[20];
int buflen, headerlen;
time_t now;
struct tm now_tm;
pid_t pid;
int fd;
int sigpipe;
struct sigaction action, oldaction;
int saved_errno = errno;
/* check for invalid priority/facility bits */
if (priority & ~(LOG_PRIMASK|LOG_FACMASK)) {
syslog(LOG_ERR|LOG_CONS|LOG_PERROR|LOG_PID, "syslog: unknown facility/priorityority: %x", priority);
priority &= LOG_PRIMASK|LOG_FACMASK;
}
/* check priority against setlogmask */
if ((LOG_MASK(LOG_PRI(priority)) && LogMask) == 0) return;
/* Set default facility if none specified. */
if ((priority & LOG_FACMASK) == 0) priority |= LogFacility;
pid = getpid();
time(&now);
strftime(time_buf, 20, "%h %e %T", localtime_r (&now, &now_tm));
if (LogStat & LOG_PID)
headerlen = snprintf(buffer, 130, "<%d>%s %s[%ld]: ", priority, time_buf, LogTag, (long) pid);
else
headerlen = snprintf(buffer, 130, "<%d>%s %s: ", priority, time_buf, LogTag);
if (!LogTag[0]) {
if ((LogStat & LOG_PID) != LOG_PID)
headerlen = snprintf(buffer, 130, "<%d>%s (unknown)[%ld]: ", priority, time_buf, (long) pid);
strcat(buffer+headerlen, "syslog without openlog w/ ident, please check code!");
buflen = 41;
}
else {
errno=saved_errno;
buflen = vsnprintf(buffer+headerlen, BUF_SIZE - headerlen, format, arg_ptr);
}
if (LogStat & LOG_PERROR) {
__libc_write(1, buffer+headerlen, buflen);
if (buffer[headerlen+buflen] != '\n') __libc_write(1,"\n", 1);
}
/* prepare for broken connection */
memset(&action, 0, sizeof(action));
action.sa_handler = SIG_IGN;
sigemptyset(&action.sa_mask);
sigpipe = sigaction (SIGPIPE, &action, &oldaction);
if (!connected) openlog_intern(LogStat | LOG_NDELAY, 0);
/* If we have a SOCK_STREAM connection, also send ASCII NUL as a
* record terminator. */
if (LogType == SOCK_STREAM) buflen++;
if (!connected || (send(LogFile, buffer, buflen+headerlen, 0) != buflen+headerlen)) {
if (LogType == SOCK_STREAM) buflen--;
closelog_intern();
/*
* Output the message to the console; don't worry about blocking,
* if console blocks everything will. Make sure the error reported
* is the one from the syslogd failure.
*/
if ((LogStat & LOG_CONS) &&
((fd = __libc_open(_PATH_CONSOLE, O_WRONLY|O_NOCTTY, 0)) >= 0))
{
__libc_write(fd, buffer, buflen+headerlen);
__libc_write(fd, "\r\n", 2);
__libc_close(fd);
}
}
if (sigpipe == 0)
sigaction(SIGPIPE, &oldaction, (struct sigaction *) NULL);
}
