void
__vsyslog_chk(int pri, int flag, const char *fmt, va_list ap)
{
struct tm now_tm;
time_t now;
int fd;
FILE *f;
char *buf = 0;
size_t bufsize = 0;
size_t msgoff;
#ifndef NO_SIGPIPE
struct sigaction action, oldaction;
int sigpipe;
#endif
int saved_errno = errno;
char failbuf[3 * sizeof (pid_t) + sizeof "out of memory []"];
#define INTERNALLOG LOG_ERR|LOG_CONS|LOG_PERROR|LOG_PID
/* Check for invalid bits. */
if (pri & ~(LOG_PRIMASK|LOG_FACMASK)) {
syslog(INTERNALLOG,
"syslog: unknown facility/priority: %x", pri);
pri &= LOG_PRIMASK|LOG_FACMASK;
}
/* Check priority against setlogmask values. */
if ((LOG_MASK (LOG_PRI (pri)) & LogMask) == 0)
return;
/* Set default facility if none specified. */
if ((pri & LOG_FACMASK) == 0)
pri |= LogFacility;
/* Build the message in a memory-buffer stream. */
f = __open_memstream (&buf, &bufsize);
if (f == NULL)
{
/* We cannot get a stream. There is not much we can do but
emitting an error messages. */
char numbuf[3 * sizeof (pid_t)];
char *nump;
char *endp = __stpcpy (failbuf, "out of memory [");
pid_t pid = __getpid ();
nump = numbuf + sizeof (numbuf);
/* The PID can never be zero. */
do
*--nump = '0' + pid % 10;
while ((pid /= 10) != 0);
endp = __mempcpy (endp, nump, (numbuf + sizeof (numbuf)) - nump);
*endp++ = ']';
*endp = '\0';
buf = failbuf;
bufsize = endp - failbuf;
msgoff = 0;
}
else
{
__fsetlocking (f, FSETLOCKING_BYCALLER);
fprintf (f, "<%d>", pri);
(void) time (&now);
f->_IO_write_ptr += __strftime_l (f->_IO_write_ptr,
f->_IO_write_end
- f->_IO_write_ptr,
"%h %e %T ",
__localtime_r (&now, &now_tm),
_nl_C_locobj_ptr);
msgoff = ftell (f);
if (LogTag == NULL)
LogTag = __progname;
if (LogTag != NULL)
__fputs_unlocked (LogTag, f);
if (LogStat & LOG_PID)
fprintf (f, "[%d]", (int) __getpid ());
if (LogTag != NULL)
{
putc_unlocked (':', f);
putc_unlocked (' ', f);
}
/* Restore errno for %m format. */
__set_errno (saved_errno);
/* We have the header. Print the user's format into the
buffer. */
if (flag == -1)
vfprintf (f, fmt, ap);
else
__vfprintf_chk (f, flag, fmt, ap);
/* Close the memory stream; this will finalize the data
into a malloc'd buffer in BUF. */
fclose (f);
}
/* Output to stderr if requested. */
if (LogStat & LOG_PERROR) {
struct iovec iov[2];
struct iovec *v = iov;
v->iov_base = buf + msgoff;
v->iov_len = bufsize - msgoff;
/* Append a newline if necessary. */
if (buf[bufsize - 1] != '\n')
{
++v;
v->iov_base = (char *) "\n";
v->iov_len = 1;
}
__libc_cleanup_push (free, buf == failbuf ? NULL : buf);
/* writev is a cancellation point. */
(void)__writev(STDERR_FILENO, iov, v - iov + 1);
__libc_cleanup_pop (0);
}
/* Prepare for multiple users. We have to take care: open and
write are cancellation points. */
struct cleanup_arg clarg;
clarg.buf = buf;
clarg.oldaction = NULL;
__libc_cleanup_push (cancel_handler, &clarg);
__libc_lock_lock (syslog_lock);
#ifndef NO_SIGPIPE
/* Prepare for a broken connection. */
memset (&action, 0, sizeof (action));
action.sa_handler = sigpipe_handler;
sigemptyset (&action.sa_mask);
sigpipe = __sigaction (SIGPIPE, &action, &oldaction);
if (sigpipe == 0)
clarg.oldaction = &oldaction;
#endif
/* Get connected, output the message to the local logger. */
if (!connected)
openlog_internal(LogTag, LogStat | LOG_NDELAY, 0);
/* If we have a SOCK_STREAM connection, also send ASCII NUL as
a record terminator. */
if (LogType == SOCK_STREAM)
++bufsize;
if (!connected || __send(LogFile, buf, bufsize, send_flags) < 0)
{
if (connected)
{
/* Try to reopen the syslog connection. Maybe it went
down. */
closelog_internal ();
openlog_internal(LogTag, LogStat | LOG_NDELAY, 0);
}
if (!connected || __send(LogFile, buf, bufsize, send_flags) < 0)
{
closelog_internal (); /* attempt re-open next time */
/*
* 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 = __open(_PATH_CONSOLE, O_WRONLY|O_NOCTTY, 0)) >= 0)
{
__dprintf (fd, "%s\r\n", buf + msgoff);
(void)__close(fd);
}
}
}
#ifndef NO_SIGPIPE
if (sigpipe == 0)
__sigaction (SIGPIPE, &oldaction, (struct sigaction *) NULL);
#endif
/* End of critical section. */
__libc_cleanup_pop (0);
__libc_lock_unlock (syslog_lock);
if (buf != failbuf)
free (buf);
}
const char* __strftime_fmt_1(char (*s)[100],
size_t* l,
int f,
const struct tm* tm,
locale_t loc) {
nl_item item;
long long val;
const char* fmt = "-";
int width = 2;
switch (f) {
case 'a':
if (tm->tm_wday > 6U)
goto string;
item = ABDAY_1 + tm->tm_wday;
goto nl_strcat;
case 'A':
if (tm->tm_wday > 6U)
goto string;
item = DAY_1 + tm->tm_wday;
goto nl_strcat;
case 'h':
case 'b':
if (tm->tm_mon > 11U)
goto string;
item = ABMON_1 + tm->tm_mon;
goto nl_strcat;
case 'B':
if (tm->tm_mon > 11U)
goto string;
item = MON_1 + tm->tm_mon;
goto nl_strcat;
case 'c':
item = D_T_FMT;
goto nl_strftime;
case 'C':
val = (1900LL + tm->tm_year) / 100;
goto number;
case 'd':
val = tm->tm_mday;
goto number;
case 'D':
fmt = "%m/%d/%y";
goto recu_strftime;
case 'e':
*l = snprintf(*s, sizeof *s, "%2d", tm->tm_mday);
return *s;
case 'F':
fmt = "%Y-%m-%d";
goto recu_strftime;
case 'g':
case 'G':
val = tm->tm_year + 1900LL;
if (tm->tm_yday < 3 && week_num(tm) != 1)
val--;
else if (tm->tm_yday > 360 && week_num(tm) == 1)
val++;
if (f == 'g')
val %= 100;
else
width = 4;
goto number;
case 'H':
val = tm->tm_hour;
goto number;
case 'I':
val = tm->tm_hour;
if (!val)
val = 12;
else if (val > 12)
val -= 12;
goto number;
case 'j':
val = tm->tm_yday + 1;
width = 3;
goto number;
case 'm':
val = tm->tm_mon + 1;
goto number;
case 'M':
val = tm->tm_min;
goto number;
case 'n':
*l = 1;
return "\n";
case 'p':
item = tm->tm_hour >= 12 ? PM_STR : AM_STR;
goto nl_strcat;
case 'r':
item = T_FMT_AMPM;
goto nl_strftime;
case 'R':
fmt = "%H:%M";
goto recu_strftime;
case 's':
val = __tm_to_secs(tm) - tm->__tm_gmtoff;
width = 1;
goto number;
case 'S':
val = tm->tm_sec;
goto number;
case 't':
*l = 1;
return "\t";
case 'T':
fmt = "%H:%M:%S";
goto recu_strftime;
case 'u':
val = tm->tm_wday ? tm->tm_wday : 7;
width = 1;
goto number;
case 'U':
val = (tm->tm_yday + 7U - tm->tm_wday) / 7;
goto number;
case 'W':
val = (tm->tm_yday + 7U - (tm->tm_wday + 6U) % 7) / 7;
goto number;
case 'V':
val = week_num(tm);
goto number;
case 'w':
val = tm->tm_wday;
width = 1;
goto number;
case 'x':
item = D_FMT;
goto nl_strftime;
case 'X':
item = T_FMT;
goto nl_strftime;
case 'y':
val = tm->tm_year % 100;
goto number;
case 'Y':
val = tm->tm_year + 1900LL;
if (val >= 10000) {
*l = snprintf(*s, sizeof *s, "+%lld", val);
return *s;
}
width = 4;
goto number;
case 'z':
if (tm->tm_isdst < 0) {
*l = 0;
return "";
}
*l = snprintf(*s, sizeof *s, "%+.2d%.2d", (tm->__tm_gmtoff) / 3600,
abs(tm->__tm_gmtoff % 3600) / 60);
return *s;
case 'Z':
if (tm->tm_isdst < 0) {
*l = 0;
return "";
}
fmt = __tm_to_tzname(tm);
goto string;
case '%':
*l = 1;
return "%";
default:
return 0;
}
number:
*l = snprintf(*s, sizeof *s, "%0*lld", width, val);
return *s;
nl_strcat:
fmt = __nl_langinfo_l(item, loc);
string:
*l = strlen(fmt);
return fmt;
nl_strftime:
fmt = __nl_langinfo_l(item, loc);
recu_strftime:
*l = __strftime_l(*s, sizeof *s, fmt, tm, loc);
if (!*l)
return 0;
return *s;
}
