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Sys::Syslog(3perl) Perl Programmers Reference Guide Sys::Syslog(3perl)
NAME
Sys::Syslog, openlog, closelog, setlogmask, syslog - Perl interface to the UNIX syslog(3)
calls
SYNOPSIS
use Sys::Syslog; # all except setlogsock, or:
use Sys::Syslog qw(:DEFAULT setlogsock); # default set, plus setlogsock
setlogsock $sock_type;
openlog $ident, $logopt, $facility; # don't forget this
syslog $priority, $format, @args;
$oldmask = setlogmask $mask_priority;
closelog;
DESCRIPTION
Sys::Syslog is an interface to the UNIX syslog(3) program. Call "syslog()" with a string
priority and a list of "printf()" args just like syslog(3).
Syslog provides the functions:
openlog $ident, $logopt, $facility
$ident is prepended to every message. $logopt contains zero or more of the words pid,
ndelay, nowait. The cons option is ignored, since the failover mechanism will drop
down to the console automatically if all other media fail. $facility specifies the
part of the system to report about, for example LOG_USER or LOG_LOCAL0: see your sys-
log(3) documentation for the facilities available in your system.
You should use openlog() before calling syslog().
syslog $priority, $format, @args
If $priority permits, logs ($format, @args) printed as by "printf(3V)", with the addi-
tion that %m is replaced with "$!" (the latest error message).
If you didn't use openlog() before using syslog(), syslog will try to guess the $ident
by extracting the shortest prefix of $format that ends in a ":".
setlogmask $mask_priority
Sets log mask $mask_priority and returns the old mask.
setlogsock $sock_type [$stream_location] (added in 5.004_02)
Sets the socket type to be used for the next call to "openlog()" or "syslog()" and
returns TRUE on success, undef on failure.
A value of 'unix' will connect to the UNIX domain socket (in some systems a character
special device) returned by the "_PATH_LOG" macro (if your system defines it), or
/dev/log or /dev/conslog, whatever is writable. A value of 'stream' will connect to
the stream indicated by the pathname provided as the optional second parameter. (For
example Solaris and IRIX require 'stream' instead of 'unix'.) A value of 'inet' will
connect to an INET socket (either tcp or udp, tried in that order) returned by get-
servbyname(). 'tcp' and 'udp' can also be given as values. The value 'console' will
send messages directly to the console, as for the 'cons' option in the logopts in
openlog().
A reference to an array can also be passed as the first parameter. When this calling
method is used, the array should contain a list of sock_types which are attempted in
order.
The default is to try tcp, udp, unix, stream, console.
Giving an invalid value for sock_type will croak.
closelog
Closes the log file.
Note that "openlog" now takes three arguments, just like openlog(3).
EXAMPLES
openlog($program, 'cons,pid', 'user');
syslog('info', 'this is another test');
syslog('mail|warning', 'this is a better test: %d', time);
closelog();
syslog('debug', 'this is the last test');
setlogsock('unix');
openlog("$program $$", 'ndelay', 'user');
syslog('notice', 'fooprogram: this is really done');
setlogsock('inet');
$! = 55;
syslog('info', 'problem was %m'); # %m == $! in syslog(3)
SEE ALSO
syslog(3)
AUTHOR
Tom Christiansen <tchrist AT perl.com> and Larry Wall <larry AT wall.org>.
UNIX domain sockets added by Sean Robinson <robinson_s AT sc.edu> with support from
Tim Bunce <Tim.Bunce AT ig.uk> and the perl5-porters mailing list.
Dependency on syslog.ph replaced with XS code by Tom Hughes <tom AT compton.nu>.
Code for constant()s regenerated by Nicholas Clark <nick AT ccl4.org>.
Failover to different communication modes by Nick Williams <Nick.Williams@morganstan-
ley.com>.
perl v5.8.4 2001-09-21 Sys::Syslog(3perl)
Generated by $Id: phpMan.php,v 4.49 2006/02/26 13:18:18 chedong Exp $ Author: Che Dong
On Apache/2.0.61 (Unix) PHP/4.4.7 mod_ssl/2.0.61 OpenSSL/0.9.7e mod_fastcgi/2.4.2 DAV/2 SVN/1.4.2
Under GNU General Public License
2009-01-07 02:30 @38.103.63.57 Crawled by CCBot/1.0 (+http://www.commoncrawl.org/bot.html)