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# this cffi version was rewritten based on the
# ctypes implementation: Victor Stinner, 2008-05-08
"""
This module provides an interface to the Unix syslog library routines.
Refer to the Unix manual pages for a detailed description of the
syslog facility.
"""
import sys
if sys.platform == 'win32':
raise ImportError("No syslog on Windows")
from cffi import FFI
try: from __pypy__ import builtinify
except ImportError: builtinify = lambda f: f
ffi = FFI()
ffi.cdef("""
/* mandatory constants */
#define LOG_EMERG ...
#define LOG_ALERT ...
#define LOG_CRIT ...
#define LOG_ERR ...
#define LOG_WARNING ...
#define LOG_NOTICE ...
#define LOG_INFO ...
#define LOG_DEBUG ...
#define LOG_PID ...
#define LOG_CONS ...
#define LOG_NDELAY ...
#define LOG_KERN ...
#define LOG_USER ...
#define LOG_MAIL ...
#define LOG_DAEMON ...
#define LOG_AUTH ...
#define LOG_LPR ...
#define LOG_LOCAL0 ...
#define LOG_LOCAL1 ...
#define LOG_LOCAL2 ...
#define LOG_LOCAL3 ...
#define LOG_LOCAL4 ...
#define LOG_LOCAL5 ...
#define LOG_LOCAL6 ...
#define LOG_LOCAL7 ...
/* optional constants, gets defined to -919919 if missing */
#define LOG_NOWAIT ...
#define LOG_PERROR ...
/* aliased constants, gets defined as some other constant if missing */
#define LOG_SYSLOG ...
#define LOG_CRON ...
#define LOG_UUCP ...
#define LOG_NEWS ...
/* functions */
void openlog(const char *ident, int option, int facility);
void syslog(int priority, const char *format, const char *string);
// NB. the signature of syslog() is specialized to the only case we use
void closelog(void);
int setlogmask(int mask);
""")
lib = ffi.verify("""
#include <syslog.h>
#ifndef LOG_NOWAIT
#define LOG_NOWAIT -919919
#endif
#ifndef LOG_PERROR
#define LOG_PERROR -919919
#endif
#ifndef LOG_SYSLOG
#define LOG_SYSLOG LOG_DAEMON
#endif
#ifndef LOG_CRON
#define LOG_CRON LOG_DAEMON
#endif
#ifndef LOG_UUCP
#define LOG_UUCP LOG_MAIL
#endif
#ifndef LOG_NEWS
#define LOG_NEWS LOG_MAIL
#endif
""")
_S_log_open = False
_S_ident_o = None
def _get_argv():
try:
import sys
script = sys.argv[0]
if isinstance(script, str):
return script[script.rfind('/')+1:] or None
except Exception:
pass
return None
@builtinify
def openlog(ident=None, logoption=0, facility=lib.LOG_USER):
global _S_ident_o, _S_log_open
if ident is None:
ident = _get_argv()
if ident is None:
_S_ident_o = ffi.NULL
elif isinstance(ident, str):
_S_ident_o = ffi.new("char[]", ident) # keepalive
else:
raise TypeError("'ident' must be a string or None")
lib.openlog(_S_ident_o, logoption, facility)
_S_log_open = True
@builtinify
def syslog(arg1, arg2=None):
if arg2 is not None:
priority, message = arg1, arg2
else:
priority, message = LOG_INFO, arg1
# if log is not opened, open it now
if not _S_log_open:
openlog()
lib.syslog(priority, "%s", message)
@builtinify
def closelog():
global _S_log_open, S_ident_o
if _S_log_open:
lib.closelog()
_S_log_open = False
_S_ident_o = None
@builtinify
def setlogmask(mask):
return lib.setlogmask(mask)
@builtinify
def LOG_MASK(pri):
return (1 << pri)
@builtinify
def LOG_UPTO(pri):
return (1 << (pri + 1)) - 1
__all__ = []
for name in sorted(lib.__dict__):
if name.startswith('LOG_'):
value = getattr(lib, name)
if value != -919919:
globals()[name] = value
__all__.append(name)
__all__ = tuple(__all__) + (
'openlog', 'syslog', 'closelog', 'setlogmask',
'LOG_MASK', 'LOG_UPTO')
|
