Commit | Line | Data |
---|---|---|
a0d0e21e | 1 | package Sys::Syslog; |
8168e71f | 2 | use strict; |
f93f88eb | 3 | use warnings; |
89c3c464 | 4 | use warnings::register; |
8168e71f | 5 | use Carp; |
f93f88eb | 6 | use Exporter (); |
a650b841 | 7 | use Fcntl qw(O_WRONLY); |
07b7e4bc | 8 | use File::Basename; |
6e4ef777 SP |
9 | use POSIX qw(strftime setlocale LC_TIME); |
10 | use Socket ':all'; | |
d329efa2 | 11 | require 5.005; |
a0d0e21e | 12 | |
89c3c464 | 13 | { no strict 'vars'; |
df6b13ce | 14 | $VERSION = '0.27'; |
89c3c464 | 15 | @ISA = qw(Exporter); |
942974c1 | 16 | |
89c3c464 | 17 | %EXPORT_TAGS = ( |
4b035b3d SP |
18 | standard => [qw(openlog syslog closelog setlogmask)], |
19 | extended => [qw(setlogsock)], | |
20 | macros => [ | |
21 | # levels | |
22 | qw( | |
23 | LOG_ALERT LOG_CRIT LOG_DEBUG LOG_EMERG LOG_ERR | |
24 | LOG_INFO LOG_NOTICE LOG_WARNING | |
25 | ), | |
26 | ||
a650b841 | 27 | # standard facilities |
4b035b3d | 28 | qw( |
a650b841 AT |
29 | LOG_AUTH LOG_AUTHPRIV LOG_CRON LOG_DAEMON LOG_FTP LOG_KERN |
30 | LOG_LOCAL0 LOG_LOCAL1 LOG_LOCAL2 LOG_LOCAL3 LOG_LOCAL4 | |
31 | LOG_LOCAL5 LOG_LOCAL6 LOG_LOCAL7 LOG_LPR LOG_MAIL LOG_NEWS | |
32 | LOG_SYSLOG LOG_USER LOG_UUCP | |
33 | ), | |
34 | # Mac OS X specific facilities | |
35 | qw( LOG_INSTALL LOG_LAUNCHD LOG_NETINFO LOG_RAS LOG_REMOTEAUTH ), | |
36 | # modern BSD specific facilities | |
37 | qw( LOG_CONSOLE LOG_NTP LOG_SECURITY ), | |
38 | # IRIX specific facilities | |
39 | qw( LOG_AUDIT LOG_LFMT ), | |
4b035b3d SP |
40 | |
41 | # options | |
42 | qw( | |
43 | LOG_CONS LOG_PID LOG_NDELAY LOG_NOWAIT LOG_ODELAY LOG_PERROR | |
44 | ), | |
45 | ||
46 | # others macros | |
47 | qw( | |
48 | LOG_FACMASK LOG_NFACILITIES LOG_PRIMASK | |
49 | LOG_MASK LOG_UPTO | |
50 | ), | |
51 | ], | |
89c3c464 | 52 | ); |
942974c1 | 53 | |
89c3c464 | 54 | @EXPORT = ( |
07b7e4bc | 55 | @{$EXPORT_TAGS{standard}}, |
89c3c464 | 56 | ); |
942974c1 | 57 | |
89c3c464 | 58 | @EXPORT_OK = ( |
07b7e4bc RGS |
59 | @{$EXPORT_TAGS{extended}}, |
60 | @{$EXPORT_TAGS{macros}}, | |
89c3c464 AT |
61 | ); |
62 | ||
63 | eval { | |
64 | require XSLoader; | |
65 | XSLoader::load('Sys::Syslog', $VERSION); | |
66 | 1 | |
67 | } or do { | |
68 | require DynaLoader; | |
69 | push @ISA, 'DynaLoader'; | |
70 | bootstrap Sys::Syslog $VERSION; | |
71 | }; | |
72 | } | |
73 | ||
74 | ||
75 | # | |
76 | # Public variables | |
77 | # | |
a650b841 | 78 | use vars qw($host); # host to send syslog messages to (see notes at end) |
89c3c464 | 79 | |
f93f88eb AT |
80 | # |
81 | # Prototypes | |
82 | # | |
83 | sub silent_eval (&); | |
84 | ||
89c3c464 AT |
85 | # |
86 | # Global variables | |
87 | # | |
a650b841 | 88 | use vars qw($facility); |
89c3c464 AT |
89 | my $connected = 0; # flag to indicate if we're connected or not |
90 | my $syslog_send; # coderef of the function used to send messages | |
91 | my $syslog_path = undef; # syslog path for "stream" and "unix" mechanisms | |
a650b841 | 92 | my $syslog_xobj = undef; # if defined, holds the external object used to send messages |
89c3c464 | 93 | my $transmit_ok = 0; # flag to indicate if the last message was transmited |
f93f88eb | 94 | my $sock_timeout = 0; # socket timeout, see below |
89c3c464 AT |
95 | my $current_proto = undef; # current mechanism used to transmit messages |
96 | my $ident = ''; # identifiant prepended to each message | |
a650b841 | 97 | $facility = ''; # current facility |
89c3c464 AT |
98 | my $maskpri = LOG_UPTO(&LOG_DEBUG); # current log mask |
99 | ||
100 | my %options = ( | |
101 | ndelay => 0, | |
102 | nofatal => 0, | |
103 | nowait => 0, | |
35a209d1 | 104 | perror => 0, |
89c3c464 | 105 | pid => 0, |
942974c1 | 106 | ); |
a0d0e21e | 107 | |
a650b841 | 108 | # Default is now to first use the native mechanism, so Perl programs |
d329efa2 AT |
109 | # behave like other normal Unix programs, then try other mechanisms. |
110 | my @connectMethods = qw(native tcp udp unix pipe stream console); | |
dbfdd438 SR |
111 | if ($^O =~ /^(freebsd|linux)$/) { |
112 | @connectMethods = grep { $_ ne 'udp' } @connectMethods; | |
113 | } | |
a650b841 | 114 | |
f93f88eb AT |
115 | # And on Win32 systems, we try to use the native mechanism for this |
116 | # platform, the events logger, available through Win32::EventLog. | |
26f266f7 | 117 | EVENTLOG: { |
26f266f7 | 118 | my $is_Win32 = $^O =~ /Win32/i; |
a650b841 | 119 | |
f93f88eb | 120 | if (can_load("Sys::Syslog::Win32")) { |
26f266f7 AT |
121 | unshift @connectMethods, 'eventlog'; |
122 | } | |
123 | elsif ($is_Win32) { | |
124 | warn $@; | |
125 | } | |
126 | } | |
35a209d1 | 127 | |
23642f4b | 128 | my @defaultMethods = @connectMethods; |
89c3c464 | 129 | my @fallbackMethods = (); |
8168e71f | 130 | |
f93f88eb AT |
131 | # The timeout in connection_ok() was pushed up to 0.25 sec in |
132 | # Sys::Syslog v0.19 in order to address a heisenbug on MacOSX: | |
133 | # http://london.pm.org/pipermail/london.pm/Week-of-Mon-20061211/005961.html | |
134 | # | |
135 | # However, this also had the effect of slowing this test for | |
136 | # all other operating systems, which apparently impacted some | |
137 | # users (cf. CPAN-RT #34753). So, in order to make everybody | |
138 | # happy, the timeout is now zero by default on all systems | |
139 | # except on OSX where it is set to 250 msec, and can be set | |
140 | # with the infamous setlogsock() function. | |
141 | $sock_timeout = 0.25 if $^O =~ /darwin/; | |
142 | ||
89c3c464 AT |
143 | # coderef for a nicer handling of errors |
144 | my $err_sub = $options{nofatal} ? \&warnings::warnif : \&croak; | |
5be1dfc7 | 145 | |
5be1dfc7 | 146 | |
89c3c464 AT |
147 | sub AUTOLOAD { |
148 | # This AUTOLOAD is used to 'autoload' constants from the constant() | |
149 | # XS function. | |
150 | no strict 'vars'; | |
151 | my $constname; | |
152 | ($constname = $AUTOLOAD) =~ s/.*:://; | |
153 | croak "Sys::Syslog::constant() not defined" if $constname eq 'constant'; | |
154 | my ($error, $val) = constant($constname); | |
a650b841 | 155 | croak $error if $error; |
89c3c464 AT |
156 | no strict 'refs'; |
157 | *$AUTOLOAD = sub { $val }; | |
158 | goto &$AUTOLOAD; | |
159 | } | |
5be1dfc7 | 160 | |
5be1dfc7 | 161 | |
89c3c464 AT |
162 | sub openlog { |
163 | ($ident, my $logopt, $facility) = @_; | |
8168e71f | 164 | |
a650b841 AT |
165 | # default values |
166 | $ident ||= basename($0) || getlogin() || getpwuid($<) || 'syslog'; | |
167 | $logopt ||= ''; | |
168 | $facility ||= LOG_USER(); | |
169 | ||
89c3c464 AT |
170 | for my $opt (split /\b/, $logopt) { |
171 | $options{$opt} = 1 if exists $options{$opt} | |
172 | } | |
5be1dfc7 | 173 | |
f93f88eb | 174 | $err_sub = delete $options{nofatal} ? \&warnings::warnif : \&croak; |
89c3c464 AT |
175 | return 1 unless $options{ndelay}; |
176 | connect_log(); | |
177 | } | |
5be1dfc7 | 178 | |
89c3c464 AT |
179 | sub closelog { |
180 | $facility = $ident = ''; | |
181 | disconnect_log(); | |
182 | } | |
8168e71f | 183 | |
89c3c464 AT |
184 | sub setlogmask { |
185 | my $oldmask = $maskpri; | |
186 | $maskpri = shift unless $_[0] == 0; | |
187 | $oldmask; | |
188 | } | |
07b7e4bc | 189 | |
89c3c464 | 190 | sub setlogsock { |
f93f88eb AT |
191 | my ($setsock, $setpath, $settime) = @_; |
192 | ||
2605937c AT |
193 | # check arguments |
194 | my $diag_invalid_arg | |
195 | = "Invalid argument passed to setlogsock; must be 'stream', 'pipe', " | |
196 | . "'unix', 'native', 'eventlog', 'tcp', 'udp' or 'inet'"; | |
197 | croak $diag_invalid_arg unless defined $setsock; | |
198 | croak "Invalid number of arguments" unless @_ >= 1 and @_ <= 3; | |
199 | ||
f93f88eb AT |
200 | $syslog_path = $setpath if defined $setpath; |
201 | $sock_timeout = $settime if defined $settime; | |
202 | ||
89c3c464 AT |
203 | disconnect_log() if $connected; |
204 | $transmit_ok = 0; | |
205 | @fallbackMethods = (); | |
206 | @connectMethods = @defaultMethods; | |
942974c1 | 207 | |
89c3c464 AT |
208 | if (ref $setsock eq 'ARRAY') { |
209 | @connectMethods = @$setsock; | |
942974c1 | 210 | |
89c3c464 | 211 | } elsif (lc $setsock eq 'stream') { |
a650b841 | 212 | if (not defined $syslog_path) { |
89c3c464 | 213 | my @try = qw(/dev/log /dev/conslog); |
a650b841 AT |
214 | |
215 | if (length &_PATH_LOG) { # Undefined _PATH_LOG is "". | |
89c3c464 AT |
216 | unshift @try, &_PATH_LOG; |
217 | } | |
a650b841 | 218 | |
89c3c464 AT |
219 | for my $try (@try) { |
220 | if (-w $try) { | |
221 | $syslog_path = $try; | |
222 | last; | |
223 | } | |
224 | } | |
a650b841 AT |
225 | |
226 | if (not defined $syslog_path) { | |
227 | warnings::warnif "stream passed to setlogsock, but could not find any device"; | |
228 | return undef | |
229 | } | |
89c3c464 | 230 | } |
a650b841 AT |
231 | |
232 | if (not -w $syslog_path) { | |
07b7e4bc | 233 | warnings::warnif "stream passed to setlogsock, but $syslog_path is not writable"; |
89c3c464 AT |
234 | return undef; |
235 | } else { | |
a650b841 | 236 | @connectMethods = qw(stream); |
89c3c464 | 237 | } |
942974c1 | 238 | |
89c3c464 | 239 | } elsif (lc $setsock eq 'unix') { |
8edeb3ad RGS |
240 | if (length _PATH_LOG() || (defined $syslog_path && -w $syslog_path)) { |
241 | $syslog_path = _PATH_LOG() unless defined $syslog_path; | |
a650b841 | 242 | @connectMethods = qw(unix); |
89c3c464 AT |
243 | } else { |
244 | warnings::warnif 'unix passed to setlogsock, but path not available'; | |
245 | return undef; | |
246 | } | |
8168e71f | 247 | |
d329efa2 AT |
248 | } elsif (lc $setsock eq 'pipe') { |
249 | for my $path ($syslog_path, &_PATH_LOG, "/dev/log") { | |
328c41c4 | 250 | next unless defined $path and length $path and -p $path and -w _; |
d329efa2 AT |
251 | $syslog_path = $path; |
252 | last | |
253 | } | |
254 | ||
255 | if (not $syslog_path) { | |
256 | warnings::warnif "pipe passed to setlogsock, but path not available"; | |
257 | return undef | |
258 | } | |
259 | ||
260 | @connectMethods = qw(pipe); | |
261 | ||
89c3c464 | 262 | } elsif (lc $setsock eq 'native') { |
a650b841 AT |
263 | @connectMethods = qw(native); |
264 | ||
265 | } elsif (lc $setsock eq 'eventlog') { | |
f93f88eb | 266 | if (can_load("Win32::EventLog")) { |
a650b841 AT |
267 | @connectMethods = qw(eventlog); |
268 | } else { | |
35a209d1 AT |
269 | warnings::warnif "eventlog passed to setlogsock, but no Win32 API available"; |
270 | $@ = ""; | |
d329efa2 | 271 | return undef; |
a650b841 | 272 | } |
8168e71f | 273 | |
89c3c464 AT |
274 | } elsif (lc $setsock eq 'tcp') { |
275 | if (getservbyname('syslog', 'tcp') || getservbyname('syslogng', 'tcp')) { | |
a650b841 | 276 | @connectMethods = qw(tcp); |
f93f88eb | 277 | $host = $syslog_path; |
89c3c464 AT |
278 | } else { |
279 | warnings::warnif "tcp passed to setlogsock, but tcp service unavailable"; | |
280 | return undef; | |
281 | } | |
942974c1 | 282 | |
89c3c464 AT |
283 | } elsif (lc $setsock eq 'udp') { |
284 | if (getservbyname('syslog', 'udp')) { | |
a650b841 | 285 | @connectMethods = qw(udp); |
f93f88eb | 286 | $host = $syslog_path; |
89c3c464 AT |
287 | } else { |
288 | warnings::warnif "udp passed to setlogsock, but udp service unavailable"; | |
289 | return undef; | |
290 | } | |
942974c1 | 291 | |
89c3c464 AT |
292 | } elsif (lc $setsock eq 'inet') { |
293 | @connectMethods = ( 'tcp', 'udp' ); | |
942974c1 | 294 | |
89c3c464 | 295 | } elsif (lc $setsock eq 'console') { |
a650b841 | 296 | @connectMethods = qw(console); |
942974c1 | 297 | |
89c3c464 | 298 | } else { |
2605937c | 299 | croak $diag_invalid_arg |
89c3c464 | 300 | } |
942974c1 | 301 | |
89c3c464 AT |
302 | return 1; |
303 | } | |
942974c1 | 304 | |
89c3c464 AT |
305 | sub syslog { |
306 | my $priority = shift; | |
307 | my $mask = shift; | |
308 | my ($message, $buf); | |
309 | my (@words, $num, $numpri, $numfac, $sum); | |
310 | my $failed = undef; | |
311 | my $fail_time = undef; | |
8edeb3ad | 312 | my $error = $!; |
8168e71f | 313 | |
a650b841 AT |
314 | # if $ident is undefined, it means openlog() wasn't previously called |
315 | # so do it now in order to have sensible defaults | |
316 | openlog() unless $ident; | |
317 | ||
318 | local $facility = $facility; # may need to change temporarily. | |
8168e71f | 319 | |
89c3c464 AT |
320 | croak "syslog: expecting argument \$priority" unless defined $priority; |
321 | croak "syslog: expecting argument \$format" unless defined $mask; | |
5be1dfc7 | 322 | |
f93f88eb | 323 | croak "syslog: invalid level/facility: $priority" if $priority =~ /^-\d+$/; |
8edeb3ad | 324 | @words = split(/\W+/, $priority, 2); # Allow "level" or "level|facility". |
89c3c464 AT |
325 | undef $numpri; |
326 | undef $numfac; | |
5be1dfc7 | 327 | |
f93f88eb AT |
328 | for my $word (@words) { |
329 | next if length $word == 0; | |
330 | ||
331 | $num = xlate($word); # Translate word to number. | |
332 | ||
333 | if ($num < 0) { | |
334 | croak "syslog: invalid level/facility: $word" | |
335 | } | |
336 | elsif ($num <= &LOG_PRIMASK) { | |
337 | croak "syslog: too many levels given: $word" if defined $numpri; | |
338 | $numpri = $num; | |
339 | return 0 unless LOG_MASK($numpri) & $maskpri; | |
340 | } | |
341 | else { | |
342 | croak "syslog: too many facilities given: $word" if defined $numfac; | |
343 | $facility = $word; | |
344 | $numfac = $num; | |
345 | } | |
89c3c464 | 346 | } |
5be1dfc7 | 347 | |
89c3c464 | 348 | croak "syslog: level must be given" unless defined $numpri; |
942974c1 | 349 | |
89c3c464 AT |
350 | if (not defined $numfac) { # Facility not specified in this call. |
351 | $facility = 'user' unless $facility; | |
352 | $numfac = xlate($facility); | |
353 | } | |
3d256c0f | 354 | |
89c3c464 | 355 | connect_log() unless $connected; |
8168e71f | 356 | |
89c3c464 | 357 | if ($mask =~ /%m/) { |
07b7e4bc | 358 | # escape percent signs for sprintf() |
8edeb3ad | 359 | $error =~ s/%/%%/g if @_; |
a650b841 | 360 | # replace %m with $error, if preceded by an even number of percent signs |
8edeb3ad | 361 | $mask =~ s/(?<!%)((?:%%)*)%m/$1$error/g; |
89c3c464 | 362 | } |
5be1dfc7 | 363 | |
89c3c464 AT |
364 | $mask .= "\n" unless $mask =~ /\n$/; |
365 | $message = @_ ? sprintf($mask, @_) : $mask; | |
942974c1 | 366 | |
d329efa2 | 367 | # See CPAN-RT#24431. Opened on Apple Radar as bug #4944407 on 2007.01.21 |
35a209d1 | 368 | # Supposedly resolved on Leopard. |
d329efa2 AT |
369 | chomp $message if $^O =~ /darwin/; |
370 | ||
371 | if ($current_proto eq 'native') { | |
89c3c464 | 372 | $buf = $message; |
a650b841 AT |
373 | } |
374 | elsif ($current_proto eq 'eventlog') { | |
375 | $buf = $message; | |
376 | } | |
377 | else { | |
89c3c464 | 378 | my $whoami = $ident; |
89c3c464 | 379 | $whoami .= "[$$]" if $options{pid}; |
942974c1 | 380 | |
89c3c464 AT |
381 | $sum = $numpri + $numfac; |
382 | my $oldlocale = setlocale(LC_TIME); | |
383 | setlocale(LC_TIME, 'C'); | |
384 | my $timestamp = strftime "%b %e %T", localtime; | |
385 | setlocale(LC_TIME, $oldlocale); | |
386 | $buf = "<$sum>$timestamp $whoami: $message\0"; | |
387 | } | |
942974c1 | 388 | |
35a209d1 AT |
389 | # handle PERROR option |
390 | # "native" mechanism already handles it by itself | |
391 | if ($options{perror} and $current_proto ne 'native') { | |
392 | chomp $message; | |
393 | my $whoami = $ident; | |
394 | $whoami .= "[$$]" if $options{pid}; | |
395 | print STDERR "$whoami: $message\n"; | |
396 | } | |
397 | ||
89c3c464 AT |
398 | # it's possible that we'll get an error from sending |
399 | # (e.g. if method is UDP and there is no UDP listener, | |
400 | # then we'll get ECONNREFUSED on the send). So what we | |
401 | # want to do at this point is to fallback onto a different | |
402 | # connection method. | |
403 | while (scalar @fallbackMethods || $syslog_send) { | |
404 | if ($failed && (time - $fail_time) > 60) { | |
405 | # it's been a while... maybe things have been fixed | |
406 | @fallbackMethods = (); | |
407 | disconnect_log(); | |
408 | $transmit_ok = 0; # make it look like a fresh attempt | |
409 | connect_log(); | |
410 | } | |
942974c1 | 411 | |
89c3c464 AT |
412 | if ($connected && !connection_ok()) { |
413 | # Something was OK, but has now broken. Remember coz we'll | |
414 | # want to go back to what used to be OK. | |
415 | $failed = $current_proto unless $failed; | |
416 | $fail_time = time; | |
417 | disconnect_log(); | |
418 | } | |
942974c1 | 419 | |
89c3c464 AT |
420 | connect_log() unless $connected; |
421 | $failed = undef if ($current_proto && $failed && $current_proto eq $failed); | |
942974c1 | 422 | |
89c3c464 | 423 | if ($syslog_send) { |
a650b841 | 424 | if ($syslog_send->($buf, $numpri, $numfac)) { |
89c3c464 AT |
425 | $transmit_ok++; |
426 | return 1; | |
427 | } | |
428 | # typically doesn't happen, since errors are rare from write(). | |
429 | disconnect_log(); | |
430 | } | |
431 | } | |
432 | # could not send, could not fallback onto a working | |
433 | # connection method. Lose. | |
434 | return 0; | |
435 | } | |
942974c1 | 436 | |
89c3c464 AT |
437 | sub _syslog_send_console { |
438 | my ($buf) = @_; | |
439 | chop($buf); # delete the NUL from the end | |
440 | # The console print is a method which could block | |
441 | # so we do it in a child process and always return success | |
442 | # to the caller. | |
443 | if (my $pid = fork) { | |
942974c1 | 444 | |
89c3c464 AT |
445 | if ($options{nowait}) { |
446 | return 1; | |
447 | } else { | |
448 | if (waitpid($pid, 0) >= 0) { | |
449 | return ($? >> 8); | |
450 | } else { | |
451 | # it's possible that the caller has other | |
452 | # plans for SIGCHLD, so let's not interfere | |
453 | return 1; | |
454 | } | |
455 | } | |
456 | } else { | |
457 | if (open(CONS, ">/dev/console")) { | |
458 | my $ret = print CONS $buf . "\r"; # XXX: should this be \x0A ? | |
459 | exit $ret if defined $pid; | |
460 | close CONS; | |
461 | } | |
462 | exit if defined $pid; | |
463 | } | |
464 | } | |
942974c1 | 465 | |
89c3c464 AT |
466 | sub _syslog_send_stream { |
467 | my ($buf) = @_; | |
468 | # XXX: this only works if the OS stream implementation makes a write | |
469 | # look like a putmsg() with simple header. For instance it works on | |
470 | # Solaris 8 but not Solaris 7. | |
471 | # To be correct, it should use a STREAMS API, but perl doesn't have one. | |
472 | return syswrite(SYSLOG, $buf, length($buf)); | |
473 | } | |
942974c1 | 474 | |
d329efa2 AT |
475 | sub _syslog_send_pipe { |
476 | my ($buf) = @_; | |
477 | return print SYSLOG $buf; | |
478 | } | |
479 | ||
89c3c464 AT |
480 | sub _syslog_send_socket { |
481 | my ($buf) = @_; | |
482 | return syswrite(SYSLOG, $buf, length($buf)); | |
483 | #return send(SYSLOG, $buf, 0); | |
484 | } | |
942974c1 | 485 | |
89c3c464 AT |
486 | sub _syslog_send_native { |
487 | my ($buf, $numpri) = @_; | |
a650b841 AT |
488 | syslog_xs($numpri, $buf); |
489 | return 1; | |
89c3c464 | 490 | } |
ce43db9b | 491 | |
5be1dfc7 | 492 | |
89c3c464 AT |
493 | # xlate() |
494 | # ----- | |
495 | # private function to translate names to numeric values | |
496 | # | |
497 | sub xlate { | |
f93f88eb AT |
498 | my ($name) = @_; |
499 | ||
89c3c464 AT |
500 | return $name+0 if $name =~ /^\s*\d+\s*$/; |
501 | $name = uc $name; | |
502 | $name = "LOG_$name" unless $name =~ /^LOG_/; | |
2605937c AT |
503 | |
504 | # ExtUtils::Constant 0.20 introduced a new way to implement | |
505 | # constants, called ProxySubs. When it was used to generate | |
506 | # the C code, the constant() function no longer returns the | |
507 | # correct value. Therefore, we first try a direct call to | |
508 | # constant(), and if the value is an error we try to call the | |
509 | # constant by its full name. | |
f93f88eb | 510 | my $value = constant($name); |
2605937c AT |
511 | |
512 | if (index($value, "not a valid") >= 0) { | |
513 | $name = "Sys::Syslog::$name"; | |
514 | $value = eval { no strict "refs"; &$name }; | |
515 | $value = $@ unless defined $value; | |
516 | } | |
517 | ||
518 | $value = -1 if index($value, "not a valid") >= 0; | |
f93f88eb | 519 | |
35a209d1 | 520 | return defined $value ? $value : -1; |
89c3c464 | 521 | } |
5be1dfc7 | 522 | |
942974c1 | 523 | |
89c3c464 AT |
524 | # connect_log() |
525 | # ----------- | |
526 | # This function acts as a kind of front-end: it tries to connect to | |
527 | # a syslog service using the selected methods, trying each one in the | |
528 | # selected order. | |
529 | # | |
530 | sub connect_log { | |
531 | @fallbackMethods = @connectMethods unless scalar @fallbackMethods; | |
07b7e4bc | 532 | |
89c3c464 AT |
533 | if ($transmit_ok && $current_proto) { |
534 | # Retry what we were on, because it has worked in the past. | |
535 | unshift(@fallbackMethods, $current_proto); | |
536 | } | |
07b7e4bc | 537 | |
89c3c464 AT |
538 | $connected = 0; |
539 | my @errs = (); | |
540 | my $proto = undef; | |
07b7e4bc | 541 | |
89c3c464 AT |
542 | while ($proto = shift @fallbackMethods) { |
543 | no strict 'refs'; | |
544 | my $fn = "connect_$proto"; | |
545 | $connected = &$fn(\@errs) if defined &$fn; | |
546 | last if $connected; | |
547 | } | |
3d256c0f | 548 | |
89c3c464 AT |
549 | $transmit_ok = 0; |
550 | if ($connected) { | |
551 | $current_proto = $proto; | |
a650b841 | 552 | my ($old) = select(SYSLOG); $| = 1; select($old); |
89c3c464 AT |
553 | } else { |
554 | @fallbackMethods = (); | |
555 | $err_sub->(join "\n\t- ", "no connection to syslog available", @errs); | |
556 | return undef; | |
557 | } | |
558 | } | |
942974c1 | 559 | |
89c3c464 AT |
560 | sub connect_tcp { |
561 | my ($errs) = @_; | |
4b035b3d | 562 | |
89c3c464 AT |
563 | my $tcp = getprotobyname('tcp'); |
564 | if (!defined $tcp) { | |
565 | push @$errs, "getprotobyname failed for tcp"; | |
566 | return 0; | |
567 | } | |
4b035b3d SP |
568 | |
569 | my $syslog = getservbyname('syslog', 'tcp'); | |
570 | $syslog = getservbyname('syslogng', 'tcp') unless defined $syslog; | |
89c3c464 AT |
571 | if (!defined $syslog) { |
572 | push @$errs, "getservbyname failed for syslog/tcp and syslogng/tcp"; | |
573 | return 0; | |
574 | } | |
942974c1 | 575 | |
4b035b3d | 576 | my $addr; |
89c3c464 | 577 | if (defined $host) { |
4b035b3d SP |
578 | $addr = inet_aton($host); |
579 | if (!$addr) { | |
89c3c464 AT |
580 | push @$errs, "can't lookup $host"; |
581 | return 0; | |
582 | } | |
583 | } else { | |
4b035b3d | 584 | $addr = INADDR_LOOPBACK; |
89c3c464 | 585 | } |
4b035b3d | 586 | $addr = sockaddr_in($syslog, $addr); |
942974c1 | 587 | |
89c3c464 AT |
588 | if (!socket(SYSLOG, AF_INET, SOCK_STREAM, $tcp)) { |
589 | push @$errs, "tcp socket: $!"; | |
590 | return 0; | |
591 | } | |
a650b841 | 592 | |
89c3c464 | 593 | setsockopt(SYSLOG, SOL_SOCKET, SO_KEEPALIVE, 1); |
f93f88eb | 594 | if (silent_eval { IPPROTO_TCP() }) { |
d329efa2 AT |
595 | # These constants don't exist in 5.005. They were added in 1999 |
596 | setsockopt(SYSLOG, IPPROTO_TCP(), TCP_NODELAY(), 1); | |
597 | } | |
4b035b3d | 598 | if (!connect(SYSLOG, $addr)) { |
89c3c464 AT |
599 | push @$errs, "tcp connect: $!"; |
600 | return 0; | |
601 | } | |
4b035b3d | 602 | |
89c3c464 | 603 | $syslog_send = \&_syslog_send_socket; |
4b035b3d | 604 | |
89c3c464 AT |
605 | return 1; |
606 | } | |
942974c1 | 607 | |
89c3c464 AT |
608 | sub connect_udp { |
609 | my ($errs) = @_; | |
4b035b3d | 610 | |
89c3c464 AT |
611 | my $udp = getprotobyname('udp'); |
612 | if (!defined $udp) { | |
613 | push @$errs, "getprotobyname failed for udp"; | |
614 | return 0; | |
615 | } | |
4b035b3d SP |
616 | |
617 | my $syslog = getservbyname('syslog', 'udp'); | |
89c3c464 AT |
618 | if (!defined $syslog) { |
619 | push @$errs, "getservbyname failed for syslog/udp"; | |
620 | return 0; | |
621 | } | |
4b035b3d SP |
622 | |
623 | my $addr; | |
89c3c464 | 624 | if (defined $host) { |
4b035b3d SP |
625 | $addr = inet_aton($host); |
626 | if (!$addr) { | |
89c3c464 AT |
627 | push @$errs, "can't lookup $host"; |
628 | return 0; | |
629 | } | |
630 | } else { | |
4b035b3d | 631 | $addr = INADDR_LOOPBACK; |
89c3c464 | 632 | } |
4b035b3d | 633 | $addr = sockaddr_in($syslog, $addr); |
942974c1 | 634 | |
89c3c464 AT |
635 | if (!socket(SYSLOG, AF_INET, SOCK_DGRAM, $udp)) { |
636 | push @$errs, "udp socket: $!"; | |
637 | return 0; | |
638 | } | |
4b035b3d | 639 | if (!connect(SYSLOG, $addr)) { |
89c3c464 AT |
640 | push @$errs, "udp connect: $!"; |
641 | return 0; | |
642 | } | |
4b035b3d | 643 | |
89c3c464 AT |
644 | # We want to check that the UDP connect worked. However the only |
645 | # way to do that is to send a message and see if an ICMP is returned | |
646 | _syslog_send_socket(""); | |
647 | if (!connection_ok()) { | |
648 | push @$errs, "udp connect: nobody listening"; | |
649 | return 0; | |
650 | } | |
4b035b3d | 651 | |
89c3c464 | 652 | $syslog_send = \&_syslog_send_socket; |
4b035b3d | 653 | |
89c3c464 AT |
654 | return 1; |
655 | } | |
9903e4c8 | 656 | |
89c3c464 AT |
657 | sub connect_stream { |
658 | my ($errs) = @_; | |
659 | # might want syslog_path to be variable based on syslog.h (if only | |
660 | # it were in there!) | |
8edeb3ad | 661 | $syslog_path = '/dev/conslog' unless defined $syslog_path; |
89c3c464 AT |
662 | if (!-w $syslog_path) { |
663 | push @$errs, "stream $syslog_path is not writable"; | |
664 | return 0; | |
665 | } | |
f93f88eb | 666 | if (!sysopen(SYSLOG, $syslog_path, O_WRONLY, 0400)) { |
89c3c464 AT |
667 | push @$errs, "stream can't open $syslog_path: $!"; |
668 | return 0; | |
669 | } | |
670 | $syslog_send = \&_syslog_send_stream; | |
671 | return 1; | |
672 | } | |
942974c1 | 673 | |
d329efa2 AT |
674 | sub connect_pipe { |
675 | my ($errs) = @_; | |
676 | ||
677 | $syslog_path ||= &_PATH_LOG || "/dev/log"; | |
678 | ||
679 | if (not -w $syslog_path) { | |
680 | push @$errs, "$syslog_path is not writable"; | |
681 | return 0; | |
682 | } | |
683 | ||
684 | if (not open(SYSLOG, ">$syslog_path")) { | |
685 | push @$errs, "can't write to $syslog_path: $!"; | |
686 | return 0; | |
687 | } | |
688 | ||
689 | $syslog_send = \&_syslog_send_pipe; | |
690 | ||
691 | return 1; | |
692 | } | |
693 | ||
89c3c464 AT |
694 | sub connect_unix { |
695 | my ($errs) = @_; | |
4b035b3d SP |
696 | |
697 | $syslog_path ||= _PATH_LOG() if length _PATH_LOG(); | |
698 | ||
699 | if (not defined $syslog_path) { | |
700 | push @$errs, "_PATH_LOG not available in syslog.h and no user-supplied socket path"; | |
89c3c464 AT |
701 | return 0; |
702 | } | |
4b035b3d | 703 | |
35a209d1 | 704 | if (not (-S $syslog_path or -c _)) { |
89c3c464 AT |
705 | push @$errs, "$syslog_path is not a socket"; |
706 | return 0; | |
707 | } | |
4b035b3d SP |
708 | |
709 | my $addr = sockaddr_un($syslog_path); | |
710 | if (!$addr) { | |
89c3c464 AT |
711 | push @$errs, "can't locate $syslog_path"; |
712 | return 0; | |
713 | } | |
4b035b3d | 714 | if (!socket(SYSLOG, AF_UNIX, SOCK_STREAM, 0)) { |
89c3c464 AT |
715 | push @$errs, "unix stream socket: $!"; |
716 | return 0; | |
717 | } | |
a650b841 | 718 | |
4b035b3d SP |
719 | if (!connect(SYSLOG, $addr)) { |
720 | if (!socket(SYSLOG, AF_UNIX, SOCK_DGRAM, 0)) { | |
89c3c464 AT |
721 | push @$errs, "unix dgram socket: $!"; |
722 | return 0; | |
723 | } | |
4b035b3d | 724 | if (!connect(SYSLOG, $addr)) { |
89c3c464 AT |
725 | push @$errs, "unix dgram connect: $!"; |
726 | return 0; | |
727 | } | |
728 | } | |
4b035b3d | 729 | |
89c3c464 | 730 | $syslog_send = \&_syslog_send_socket; |
4b035b3d | 731 | |
89c3c464 AT |
732 | return 1; |
733 | } | |
942974c1 | 734 | |
89c3c464 AT |
735 | sub connect_native { |
736 | my ($errs) = @_; | |
737 | my $logopt = 0; | |
5be1dfc7 | 738 | |
89c3c464 AT |
739 | # reconstruct the numeric equivalent of the options |
740 | for my $opt (keys %options) { | |
741 | $logopt += xlate($opt) if $options{$opt} | |
742 | } | |
942974c1 | 743 | |
f93f88eb | 744 | openlog_xs($ident, $logopt, xlate($facility)); |
89c3c464 | 745 | $syslog_send = \&_syslog_send_native; |
942974c1 | 746 | |
89c3c464 AT |
747 | return 1; |
748 | } | |
6e4ef777 | 749 | |
a650b841 AT |
750 | sub connect_eventlog { |
751 | my ($errs) = @_; | |
752 | ||
753 | $syslog_xobj = Sys::Syslog::Win32::_install(); | |
754 | $syslog_send = \&Sys::Syslog::Win32::_syslog_send; | |
755 | ||
756 | return 1; | |
757 | } | |
758 | ||
89c3c464 AT |
759 | sub connect_console { |
760 | my ($errs) = @_; | |
761 | if (!-w '/dev/console') { | |
762 | push @$errs, "console is not writable"; | |
763 | return 0; | |
764 | } | |
765 | $syslog_send = \&_syslog_send_console; | |
766 | return 1; | |
767 | } | |
6e4ef777 | 768 | |
a650b841 | 769 | # To test if the connection is still good, we need to check if any |
89c3c464 AT |
770 | # errors are present on the connection. The errors will not be raised |
771 | # by a write. Instead, sockets are made readable and the next read | |
772 | # would cause the error to be returned. Unfortunately the syslog | |
773 | # 'protocol' never provides anything for us to read. But with | |
774 | # judicious use of select(), we can see if it would be readable... | |
775 | sub connection_ok { | |
776 | return 1 if defined $current_proto and ( | |
777 | $current_proto eq 'native' or $current_proto eq 'console' | |
a650b841 | 778 | or $current_proto eq 'eventlog' |
89c3c464 | 779 | ); |
a650b841 | 780 | |
89c3c464 AT |
781 | my $rin = ''; |
782 | vec($rin, fileno(SYSLOG), 1) = 1; | |
f93f88eb | 783 | my $ret = select $rin, undef, $rin, $sock_timeout; |
89c3c464 AT |
784 | return ($ret ? 0 : 1); |
785 | } | |
942974c1 | 786 | |
89c3c464 AT |
787 | sub disconnect_log { |
788 | $connected = 0; | |
789 | $syslog_send = undef; | |
942974c1 | 790 | |
a650b841 AT |
791 | if (defined $current_proto and $current_proto eq 'native') { |
792 | closelog_xs(); | |
793 | return 1; | |
794 | } | |
795 | elsif (defined $current_proto and $current_proto eq 'eventlog') { | |
796 | $syslog_xobj->Close(); | |
89c3c464 AT |
797 | return 1; |
798 | } | |
6e4ef777 | 799 | |
89c3c464 AT |
800 | return close SYSLOG; |
801 | } | |
6e4ef777 | 802 | |
f93f88eb AT |
803 | |
804 | # | |
805 | # Wrappers around eval() that makes sure that nobody, and I say NOBODY, | |
806 | # ever knows that I wanted to test if something was here or not. | |
807 | # It is needed because some applications are trying to be too smart, | |
808 | # do it wrong, and it ends up in EPIC FAIL. | |
809 | # Yes I'm speaking of YOU, SpamAssassin. | |
810 | # | |
811 | sub silent_eval (&) { | |
812 | local($SIG{__DIE__}, $SIG{__WARN__}, $@); | |
2605937c | 813 | return eval { $_[0]->() } |
f93f88eb AT |
814 | } |
815 | ||
816 | sub can_load { | |
817 | local($SIG{__DIE__}, $SIG{__WARN__}, $@); | |
818 | return eval "use $_[0]; 1" | |
819 | } | |
820 | ||
821 | ||
822 | "Eighth Rule: read the documentation." | |
942974c1 | 823 | |
89c3c464 | 824 | __END__ |
5be1dfc7 | 825 | |
89c3c464 | 826 | =head1 NAME |
8168e71f | 827 | |
89c3c464 | 828 | Sys::Syslog - Perl interface to the UNIX syslog(3) calls |
3ffabb8c | 829 | |
89c3c464 | 830 | =head1 VERSION |
3ffabb8c | 831 | |
df6b13ce | 832 | Version 0.27 |
23642f4b | 833 | |
89c3c464 | 834 | =head1 SYNOPSIS |
cb63fe9d | 835 | |
89c3c464 AT |
836 | use Sys::Syslog; # all except setlogsock(), or: |
837 | use Sys::Syslog qw(:DEFAULT setlogsock); # default set, plus setlogsock() | |
838 | use Sys::Syslog qw(:standard :macros); # standard functions, plus macros | |
23642f4b | 839 | |
89c3c464 AT |
840 | openlog $ident, $logopt, $facility; # don't forget this |
841 | syslog $priority, $format, @args; | |
842 | $oldmask = setlogmask $mask_priority; | |
843 | closelog; | |
cb63fe9d | 844 | |
942974c1 | 845 | |
89c3c464 | 846 | =head1 DESCRIPTION |
5be1dfc7 | 847 | |
89c3c464 AT |
848 | C<Sys::Syslog> is an interface to the UNIX C<syslog(3)> program. |
849 | Call C<syslog()> with a string priority and a list of C<printf()> args | |
850 | just like C<syslog(3)>. | |
5be1dfc7 | 851 | |
a650b841 AT |
852 | You can find a kind of FAQ in L<"THE RULES OF SYS::SYSLOG">. Please read |
853 | it before coding, and again before asking questions. | |
854 | ||
5be1dfc7 | 855 | |
89c3c464 | 856 | =head1 EXPORTS |
5be1dfc7 | 857 | |
89c3c464 | 858 | C<Sys::Syslog> exports the following C<Exporter> tags: |
5be1dfc7 | 859 | |
89c3c464 AT |
860 | =over 4 |
861 | ||
862 | =item * | |
863 | ||
864 | C<:standard> exports the standard C<syslog(3)> functions: | |
865 | ||
866 | openlog closelog setlogmask syslog | |
867 | ||
868 | =item * | |
869 | ||
870 | C<:extended> exports the Perl specific functions for C<syslog(3)>: | |
871 | ||
872 | setlogsock | |
873 | ||
874 | =item * | |
875 | ||
876 | C<:macros> exports the symbols corresponding to most of your C<syslog(3)> | |
877 | macros and the C<LOG_UPTO()> and C<LOG_MASK()> functions. | |
878 | See L<"CONSTANTS"> for the supported constants and their meaning. | |
879 | ||
880 | =back | |
881 | ||
882 | By default, C<Sys::Syslog> exports the symbols from the C<:standard> tag. | |
883 | ||
884 | ||
885 | =head1 FUNCTIONS | |
886 | ||
887 | =over 4 | |
888 | ||
889 | =item B<openlog($ident, $logopt, $facility)> | |
890 | ||
891 | Opens the syslog. | |
892 | C<$ident> is prepended to every message. C<$logopt> contains zero or | |
893 | more of the options detailed below. C<$facility> specifies the part | |
894 | of the system to report about, for example C<LOG_USER> or C<LOG_LOCAL0>: | |
895 | see L<"Facilities"> for a list of well-known facilities, and your | |
896 | C<syslog(3)> documentation for the facilities available in your system. | |
897 | Check L<"SEE ALSO"> for useful links. Facility can be given as a string | |
898 | or a numeric macro. | |
899 | ||
900 | This function will croak if it can't connect to the syslog daemon. | |
901 | ||
902 | Note that C<openlog()> now takes three arguments, just like C<openlog(3)>. | |
903 | ||
904 | B<You should use C<openlog()> before calling C<syslog()>.> | |
905 | ||
906 | B<Options> | |
907 | ||
908 | =over 4 | |
909 | ||
910 | =item * | |
911 | ||
912 | C<cons> - This option is ignored, since the failover mechanism will drop | |
913 | down to the console automatically if all other media fail. | |
914 | ||
915 | =item * | |
916 | ||
917 | C<ndelay> - Open the connection immediately (normally, the connection is | |
918 | opened when the first message is logged). | |
919 | ||
920 | =item * | |
921 | ||
922 | C<nofatal> - When set to true, C<openlog()> and C<syslog()> will only | |
923 | emit warnings instead of dying if the connection to the syslog can't | |
924 | be established. | |
925 | ||
926 | =item * | |
927 | ||
928 | C<nowait> - Don't wait for child processes that may have been created | |
929 | while logging the message. (The GNU C library does not create a child | |
930 | process, so this option has no effect on Linux.) | |
931 | ||
932 | =item * | |
933 | ||
35a209d1 AT |
934 | C<perror> - Write the message to standard error output as well to the |
935 | system log. | |
936 | ||
937 | =item * | |
938 | ||
89c3c464 AT |
939 | C<pid> - Include PID with each message. |
940 | ||
941 | =back | |
942 | ||
943 | B<Examples> | |
944 | ||
945 | Open the syslog with options C<ndelay> and C<pid>, and with facility C<LOCAL0>: | |
946 | ||
947 | openlog($name, "ndelay,pid", "local0"); | |
948 | ||
949 | Same thing, but this time using the macro corresponding to C<LOCAL0>: | |
950 | ||
951 | openlog($name, "ndelay,pid", LOG_LOCAL0); | |
952 | ||
953 | ||
954 | =item B<syslog($priority, $message)> | |
955 | ||
956 | =item B<syslog($priority, $format, @args)> | |
957 | ||
958 | If C<$priority> permits, logs C<$message> or C<sprintf($format, @args)> | |
959 | with the addition that C<%m> in $message or C<$format> is replaced with | |
960 | C<"$!"> (the latest error message). | |
961 | ||
962 | C<$priority> can specify a level, or a level and a facility. Levels and | |
a650b841 AT |
963 | facilities can be given as strings or as macros. When using the C<eventlog> |
964 | mechanism, priorities C<DEBUG> and C<INFO> are mapped to event type | |
965 | C<informational>, C<NOTICE> and C<WARNIN> to C<warning> and C<ERR> to | |
966 | C<EMERG> to C<error>. | |
89c3c464 AT |
967 | |
968 | If you didn't use C<openlog()> before using C<syslog()>, C<syslog()> will | |
969 | try to guess the C<$ident> by extracting the shortest prefix of | |
970 | C<$format> that ends in a C<":">. | |
971 | ||
972 | B<Examples> | |
973 | ||
974 | syslog("info", $message); # informational level | |
975 | syslog(LOG_INFO, $message); # informational level | |
976 | ||
977 | syslog("info|local0", $message); # information level, Local0 facility | |
978 | syslog(LOG_INFO|LOG_LOCAL0, $message); # information level, Local0 facility | |
979 | ||
980 | =over 4 | |
981 | ||
982 | =item B<Note> | |
983 | ||
984 | C<Sys::Syslog> version v0.07 and older passed the C<$message> as the | |
985 | formatting string to C<sprintf()> even when no formatting arguments | |
986 | were provided. If the code calling C<syslog()> might execute with | |
987 | older versions of this module, make sure to call the function as | |
988 | C<syslog($priority, "%s", $message)> instead of C<syslog($priority, | |
989 | $message)>. This protects against hostile formatting sequences that | |
990 | might show up if $message contains tainted data. | |
991 | ||
992 | =back | |
993 | ||
994 | ||
995 | =item B<setlogmask($mask_priority)> | |
996 | ||
997 | Sets the log mask for the current process to C<$mask_priority> and | |
998 | returns the old mask. If the mask argument is 0, the current log mask | |
999 | is not modified. See L<"Levels"> for the list of available levels. | |
1000 | You can use the C<LOG_UPTO()> function to allow all levels up to a | |
1001 | given priority (but it only accept the numeric macros as arguments). | |
1002 | ||
1003 | B<Examples> | |
1004 | ||
1005 | Only log errors: | |
1006 | ||
1007 | setlogmask( LOG_MASK(LOG_ERR) ); | |
1008 | ||
1009 | Log everything except informational messages: | |
1010 | ||
1011 | setlogmask( ~(LOG_MASK(LOG_INFO)) ); | |
1012 | ||
1013 | Log critical messages, errors and warnings: | |
1014 | ||
1015 | setlogmask( LOG_MASK(LOG_CRIT) | LOG_MASK(LOG_ERR) | LOG_MASK(LOG_WARNING) ); | |
1016 | ||
1017 | Log all messages up to debug: | |
1018 | ||
1019 | setlogmask( LOG_UPTO(LOG_DEBUG) ); | |
1020 | ||
1021 | ||
1022 | =item B<setlogsock($sock_type)> | |
1023 | ||
07b7e4bc | 1024 | =item B<setlogsock($sock_type, $stream_location)> (added in Perl 5.004_02) |
89c3c464 | 1025 | |
f93f88eb AT |
1026 | =item B<setlogsock($sock_type, $stream_location, $sock_timeout)> (added in 0.25) |
1027 | ||
89c3c464 AT |
1028 | Sets the socket type to be used for the next call to |
1029 | C<openlog()> or C<syslog()> and returns true on success, | |
4b035b3d SP |
1030 | C<undef> on failure. The available mechanisms are: |
1031 | ||
1032 | =over | |
1033 | ||
1034 | =item * | |
1035 | ||
07b7e4bc RGS |
1036 | C<"native"> - use the native C functions from your C<syslog(3)> library |
1037 | (added in C<Sys::Syslog> 0.15). | |
4b035b3d SP |
1038 | |
1039 | =item * | |
1040 | ||
d329efa2 AT |
1041 | C<"eventlog"> - send messages to the Win32 events logger (Win32 only; |
1042 | added in C<Sys::Syslog> 0.19). | |
1043 | ||
1044 | =item * | |
1045 | ||
4b035b3d | 1046 | C<"tcp"> - connect to a TCP socket, on the C<syslog/tcp> or C<syslogng/tcp> |
f93f88eb | 1047 | service. If defined, the second parameter is used as a hostname to connect to. |
4b035b3d SP |
1048 | |
1049 | =item * | |
1050 | ||
1051 | C<"udp"> - connect to a UDP socket, on the C<syslog/udp> service. | |
f93f88eb AT |
1052 | If defined, the second parameter is used as a hostname to connect to, |
1053 | and the third parameter as the timeout used to check for UDP response. | |
4b035b3d SP |
1054 | |
1055 | =item * | |
1056 | ||
f93f88eb AT |
1057 | C<"inet"> - connect to an INET socket, either TCP or UDP, tried in that |
1058 | order. If defined, the second parameter is used as a hostname to connect to. | |
4b035b3d SP |
1059 | |
1060 | =item * | |
1061 | ||
1062 | C<"unix"> - connect to a UNIX domain socket (in some systems a character | |
1063 | special device). The name of that socket is the second parameter or, if | |
1064 | you omit the second parameter, the value returned by the C<_PATH_LOG> macro | |
1065 | (if your system defines it), or F</dev/log> or F</dev/conslog>, whatever is | |
1066 | writable. | |
1067 | ||
1068 | =item * | |
1069 | ||
1070 | C<"stream"> - connect to the stream indicated by the pathname provided as | |
1071 | the optional second parameter, or, if omitted, to F</dev/conslog>. | |
1072 | For example Solaris and IRIX system may prefer C<"stream"> instead of C<"unix">. | |
1073 | ||
1074 | =item * | |
1075 | ||
d329efa2 AT |
1076 | C<"pipe"> - connect to the named pipe indicated by the pathname provided as |
1077 | the optional second parameter, or, if omitted, to the value returned by | |
1078 | the C<_PATH_LOG> macro (if your system defines it), or F</dev/log> | |
1079 | (added in C<Sys::Syslog> 0.21). | |
4b035b3d | 1080 | |
a650b841 AT |
1081 | =item * |
1082 | ||
d329efa2 AT |
1083 | C<"console"> - send messages directly to the console, as for the C<"cons"> |
1084 | option of C<openlog()>. | |
a650b841 | 1085 | |
4b035b3d | 1086 | =back |
89c3c464 AT |
1087 | |
1088 | A reference to an array can also be passed as the first parameter. | |
1089 | When this calling method is used, the array should contain a list of | |
4b035b3d | 1090 | mechanisms which are attempted in order. |
89c3c464 | 1091 | |
f93f88eb AT |
1092 | The default is to try C<native>, C<tcp>, C<udp>, C<unix>, C<pipe>, C<stream>, |
1093 | C<console>. | |
35a209d1 AT |
1094 | Under systems with the Win32 API, C<eventlog> will be added as the first |
1095 | mechanism to try if C<Win32::EventLog> is available. | |
89c3c464 | 1096 | |
07b7e4bc | 1097 | Giving an invalid value for C<$sock_type> will C<croak>. |
89c3c464 | 1098 | |
4b035b3d SP |
1099 | B<Examples> |
1100 | ||
1101 | Select the UDP socket mechanism: | |
1102 | ||
1103 | setlogsock("udp"); | |
1104 | ||
1105 | Select the native, UDP socket then UNIX domain socket mechanisms: | |
1106 | ||
1107 | setlogsock(["native", "udp", "unix"]); | |
1108 | ||
07b7e4bc RGS |
1109 | =over |
1110 | ||
1111 | =item B<Note> | |
1112 | ||
1113 | Now that the "native" mechanism is supported by C<Sys::Syslog> and selected | |
1114 | by default, the use of the C<setlogsock()> function is discouraged because | |
1115 | other mechanisms are less portable across operating systems. Authors of | |
1116 | modules and programs that use this function, especially its cargo-cult form | |
1117 | C<setlogsock("unix")>, are advised to remove any occurence of it unless they | |
1118 | specifically want to use a given mechanism (like TCP or UDP to connect to | |
1119 | a remote host). | |
1120 | ||
1121 | =back | |
89c3c464 AT |
1122 | |
1123 | =item B<closelog()> | |
1124 | ||
4b035b3d | 1125 | Closes the log file and returns true on success. |
89c3c464 AT |
1126 | |
1127 | =back | |
1128 | ||
1129 | ||
a650b841 AT |
1130 | =head1 THE RULES OF SYS::SYSLOG |
1131 | ||
1132 | I<The First Rule of Sys::Syslog is:> | |
1133 | You do not call C<setlogsock>. | |
1134 | ||
1135 | I<The Second Rule of Sys::Syslog is:> | |
1136 | You B<do not> call C<setlogsock>. | |
1137 | ||
1138 | I<The Third Rule of Sys::Syslog is:> | |
1139 | The program crashes, C<die>s, calls C<closelog>, the log is over. | |
1140 | ||
1141 | I<The Fourth Rule of Sys::Syslog is:> | |
1142 | One facility, one priority. | |
1143 | ||
1144 | I<The Fifth Rule of Sys::Syslog is:> | |
1145 | One log at a time. | |
1146 | ||
1147 | I<The Sixth Rule of Sys::Syslog is:> | |
1148 | No C<syslog> before C<openlog>. | |
1149 | ||
1150 | I<The Seventh Rule of Sys::Syslog is:> | |
1151 | Logs will go on as long as they have to. | |
1152 | ||
1153 | I<The Eighth, and Final Rule of Sys::Syslog is:> | |
1154 | If this is your first use of Sys::Syslog, you must read the doc. | |
1155 | ||
1156 | ||
89c3c464 AT |
1157 | =head1 EXAMPLES |
1158 | ||
a650b841 AT |
1159 | An example: |
1160 | ||
89c3c464 AT |
1161 | openlog($program, 'cons,pid', 'user'); |
1162 | syslog('info', '%s', 'this is another test'); | |
1163 | syslog('mail|warning', 'this is a better test: %d', time); | |
1164 | closelog(); | |
5be1dfc7 HF |
1165 | |
1166 | syslog('debug', 'this is the last test'); | |
cb63fe9d | 1167 | |
a650b841 AT |
1168 | Another example: |
1169 | ||
5be1dfc7 HF |
1170 | openlog("$program $$", 'ndelay', 'user'); |
1171 | syslog('notice', 'fooprogram: this is really done'); | |
1172 | ||
a650b841 AT |
1173 | Example of use of C<%m>: |
1174 | ||
5be1dfc7 | 1175 | $! = 55; |
6e4ef777 SP |
1176 | syslog('info', 'problem was %m'); # %m == $! in syslog(3) |
1177 | ||
1178 | Log to UDP port on C<$remotehost> instead of logging locally: | |
5be1dfc7 | 1179 | |
f93f88eb | 1180 | setlogsock("udp", $remotehost); |
476b65d9 JH |
1181 | openlog($program, 'ndelay', 'user'); |
1182 | syslog('info', 'something happened over here'); | |
1183 | ||
8168e71f SP |
1184 | |
1185 | =head1 CONSTANTS | |
1186 | ||
1187 | =head2 Facilities | |
1188 | ||
1189 | =over 4 | |
1190 | ||
1191 | =item * | |
1192 | ||
a650b841 AT |
1193 | C<LOG_AUDIT> - audit daemon (IRIX); falls back to C<LOG_AUTH> |
1194 | ||
1195 | =item * | |
1196 | ||
8168e71f SP |
1197 | C<LOG_AUTH> - security/authorization messages |
1198 | ||
1199 | =item * | |
1200 | ||
1201 | C<LOG_AUTHPRIV> - security/authorization messages (private) | |
1202 | ||
1203 | =item * | |
1204 | ||
a650b841 AT |
1205 | C<LOG_CONSOLE> - C</dev/console> output (FreeBSD); falls back to C<LOG_USER> |
1206 | ||
1207 | =item * | |
1208 | ||
4b035b3d | 1209 | C<LOG_CRON> - clock daemons (B<cron> and B<at>) |
8168e71f SP |
1210 | |
1211 | =item * | |
1212 | ||
1213 | C<LOG_DAEMON> - system daemons without separate facility value | |
1214 | ||
1215 | =item * | |
1216 | ||
4b035b3d | 1217 | C<LOG_FTP> - FTP daemon |
8168e71f SP |
1218 | |
1219 | =item * | |
1220 | ||
1221 | C<LOG_KERN> - kernel messages | |
1222 | ||
1223 | =item * | |
1224 | ||
a650b841 | 1225 | C<LOG_INSTALL> - installer subsystem (Mac OS X); falls back to C<LOG_USER> |
4b035b3d SP |
1226 | |
1227 | =item * | |
1228 | ||
a650b841 AT |
1229 | C<LOG_LAUNCHD> - launchd - general bootstrap daemon (Mac OS X); |
1230 | falls back to C<LOG_DAEMON> | |
1231 | ||
1232 | =item * | |
1233 | ||
1234 | C<LOG_LFMT> - logalert facility; falls back to C<LOG_USER> | |
4b035b3d SP |
1235 | |
1236 | =item * | |
1237 | ||
8168e71f SP |
1238 | C<LOG_LOCAL0> through C<LOG_LOCAL7> - reserved for local use |
1239 | ||
1240 | =item * | |
1241 | ||
1242 | C<LOG_LPR> - line printer subsystem | |
1243 | ||
1244 | =item * | |
1245 | ||
1246 | C<LOG_MAIL> - mail subsystem | |
1247 | ||
1248 | =item * | |
1249 | ||
a650b841 | 1250 | C<LOG_NETINFO> - NetInfo subsystem (Mac OS X); falls back to C<LOG_DAEMON> |
4b035b3d SP |
1251 | |
1252 | =item * | |
1253 | ||
8168e71f SP |
1254 | C<LOG_NEWS> - USENET news subsystem |
1255 | ||
1256 | =item * | |
1257 | ||
a650b841 AT |
1258 | C<LOG_NTP> - NTP subsystem (FreeBSD, NetBSD); falls back to C<LOG_DAEMON> |
1259 | ||
1260 | =item * | |
1261 | ||
1262 | C<LOG_RAS> - Remote Access Service (VPN / PPP) (Mac OS X); | |
1263 | falls back to C<LOG_AUTH> | |
4b035b3d SP |
1264 | |
1265 | =item * | |
1266 | ||
a650b841 AT |
1267 | C<LOG_REMOTEAUTH> - remote authentication/authorization (Mac OS X); |
1268 | falls back to C<LOG_AUTH> | |
1269 | ||
1270 | =item * | |
1271 | ||
1272 | C<LOG_SECURITY> - security subsystems (firewalling, etc.) (FreeBSD); | |
1273 | falls back to C<LOG_AUTH> | |
4b035b3d SP |
1274 | |
1275 | =item * | |
1276 | ||
8168e71f SP |
1277 | C<LOG_SYSLOG> - messages generated internally by B<syslogd> |
1278 | ||
1279 | =item * | |
1280 | ||
1281 | C<LOG_USER> (default) - generic user-level messages | |
1282 | ||
1283 | =item * | |
1284 | ||
1285 | C<LOG_UUCP> - UUCP subsystem | |
1286 | ||
1287 | =back | |
1288 | ||
1289 | ||
1290 | =head2 Levels | |
1291 | ||
1292 | =over 4 | |
1293 | ||
1294 | =item * | |
1295 | ||
1296 | C<LOG_EMERG> - system is unusable | |
1297 | ||
1298 | =item * | |
1299 | ||
1300 | C<LOG_ALERT> - action must be taken immediately | |
1301 | ||
1302 | =item * | |
1303 | ||
1304 | C<LOG_CRIT> - critical conditions | |
1305 | ||
1306 | =item * | |
1307 | ||
942974c1 | 1308 | C<LOG_ERR> - error conditions |
8168e71f SP |
1309 | |
1310 | =item * | |
1311 | ||
1312 | C<LOG_WARNING> - warning conditions | |
1313 | ||
1314 | =item * | |
1315 | ||
1316 | C<LOG_NOTICE> - normal, but significant, condition | |
1317 | ||
1318 | =item * | |
1319 | ||
1320 | C<LOG_INFO> - informational message | |
1321 | ||
1322 | =item * | |
1323 | ||
1324 | C<LOG_DEBUG> - debug-level message | |
1325 | ||
1326 | =back | |
1327 | ||
1328 | ||
1329 | =head1 DIAGNOSTICS | |
1330 | ||
a650b841 | 1331 | =over |
8168e71f | 1332 | |
a650b841 | 1333 | =item C<Invalid argument passed to setlogsock> |
8168e71f SP |
1334 | |
1335 | B<(F)> You gave C<setlogsock()> an invalid value for C<$sock_type>. | |
1336 | ||
35a209d1 | 1337 | =item C<eventlog passed to setlogsock, but no Win32 API available> |
a650b841 AT |
1338 | |
1339 | B<(W)> You asked C<setlogsock()> to use the Win32 event logger but the | |
1340 | operating system running the program isn't Win32 or does not provides Win32 | |
35a209d1 | 1341 | compatible facilities. |
a650b841 AT |
1342 | |
1343 | =item C<no connection to syslog available> | |
8168e71f SP |
1344 | |
1345 | B<(F)> C<syslog()> failed to connect to the specified socket. | |
1346 | ||
a650b841 | 1347 | =item C<stream passed to setlogsock, but %s is not writable> |
8168e71f | 1348 | |
942974c1 | 1349 | B<(W)> You asked C<setlogsock()> to use a stream socket, but the given |
8168e71f SP |
1350 | path is not writable. |
1351 | ||
a650b841 | 1352 | =item C<stream passed to setlogsock, but could not find any device> |
8168e71f | 1353 | |
942974c1 | 1354 | B<(W)> You asked C<setlogsock()> to use a stream socket, but didn't |
8168e71f SP |
1355 | provide a path, and C<Sys::Syslog> was unable to find an appropriate one. |
1356 | ||
a650b841 | 1357 | =item C<tcp passed to setlogsock, but tcp service unavailable> |
8168e71f | 1358 | |
942974c1 | 1359 | B<(W)> You asked C<setlogsock()> to use a TCP socket, but the service |
8168e71f SP |
1360 | is not available on the system. |
1361 | ||
a650b841 | 1362 | =item C<syslog: expecting argument %s> |
8168e71f SP |
1363 | |
1364 | B<(F)> You forgot to give C<syslog()> the indicated argument. | |
1365 | ||
a650b841 | 1366 | =item C<syslog: invalid level/facility: %s> |
8168e71f | 1367 | |
6e4ef777 | 1368 | B<(F)> You specified an invalid level or facility. |
8168e71f | 1369 | |
a650b841 | 1370 | =item C<syslog: too many levels given: %s> |
8168e71f SP |
1371 | |
1372 | B<(F)> You specified too many levels. | |
1373 | ||
a650b841 | 1374 | =item C<syslog: too many facilities given: %s> |
8168e71f SP |
1375 | |
1376 | B<(F)> You specified too many facilities. | |
1377 | ||
a650b841 | 1378 | =item C<syslog: level must be given> |
8168e71f SP |
1379 | |
1380 | B<(F)> You forgot to specify a level. | |
1381 | ||
a650b841 | 1382 | =item C<udp passed to setlogsock, but udp service unavailable> |
8168e71f | 1383 | |
942974c1 | 1384 | B<(W)> You asked C<setlogsock()> to use a UDP socket, but the service |
8168e71f SP |
1385 | is not available on the system. |
1386 | ||
a650b841 | 1387 | =item C<unix passed to setlogsock, but path not available> |
8168e71f | 1388 | |
942974c1 | 1389 | B<(W)> You asked C<setlogsock()> to use a UNIX socket, but C<Sys::Syslog> |
8168e71f SP |
1390 | was unable to find an appropriate an appropriate device. |
1391 | ||
1392 | =back | |
1393 | ||
1394 | ||
5be1dfc7 HF |
1395 | =head1 SEE ALSO |
1396 | ||
a650b841 AT |
1397 | =head2 Manual Pages |
1398 | ||
5be1dfc7 HF |
1399 | L<syslog(3)> |
1400 | ||
6e4ef777 SP |
1401 | SUSv3 issue 6, IEEE Std 1003.1, 2004 edition, |
1402 | L<http://www.opengroup.org/onlinepubs/000095399/basedefs/syslog.h.html> | |
1403 | ||
1404 | GNU C Library documentation on syslog, | |
1405 | L<http://www.gnu.org/software/libc/manual/html_node/Syslog.html> | |
1406 | ||
1407 | Solaris 10 documentation on syslog, | |
f93f88eb AT |
1408 | L<http://docs.sun.com/app/docs/doc/816-5168/syslog-3c?a=view> |
1409 | ||
1410 | Mac OS X documentation on syslog, | |
1411 | L<http://developer.apple.com/documentation/Darwin/Reference/ManPages/man3/syslog.3.html> | |
6e4ef777 | 1412 | |
f93f88eb AT |
1413 | IRIX 6.5 documentation on syslog, |
1414 | L<http://techpubs.sgi.com/library/tpl/cgi-bin/getdoc.cgi?coll=0650&db=man&fname=3c+syslog> | |
a650b841 | 1415 | |
6e4ef777 | 1416 | AIX 5L 5.3 documentation on syslog, |
d329efa2 | 1417 | L<http://publib.boulder.ibm.com/infocenter/pseries/v5r3/index.jsp?topic=/com.ibm.aix.basetechref/doc/basetrf2/syslog.htm> |
6e4ef777 SP |
1418 | |
1419 | HP-UX 11i documentation on syslog, | |
f93f88eb | 1420 | L<http://docs.hp.com/en/B2355-60130/syslog.3C.html> |
6e4ef777 SP |
1421 | |
1422 | Tru64 5.1 documentation on syslog, | |
1423 | L<http://h30097.www3.hp.com/docs/base_doc/DOCUMENTATION/V51_HTML/MAN/MAN3/0193____.HTM> | |
1424 | ||
1425 | Stratus VOS 15.1, | |
1426 | L<http://stratadoc.stratus.com/vos/15.1.1/r502-01/wwhelp/wwhimpl/js/html/wwhelp.htm?context=r502-01&file=ch5r502-01bi.html> | |
1427 | ||
a650b841 AT |
1428 | =head2 RFCs |
1429 | ||
6e4ef777 SP |
1430 | I<RFC 3164 - The BSD syslog Protocol>, L<http://www.faqs.org/rfcs/rfc3164.html> |
1431 | -- Please note that this is an informational RFC, and therefore does not | |
1432 | specify a standard of any kind. | |
1433 | ||
1434 | I<RFC 3195 - Reliable Delivery for syslog>, L<http://www.faqs.org/rfcs/rfc3195.html> | |
1435 | ||
a650b841 AT |
1436 | =head2 Articles |
1437 | ||
04f98b29 RGS |
1438 | I<Syslogging with Perl>, L<http://lexington.pm.org/meetings/022001.html> |
1439 | ||
a650b841 | 1440 | =head2 Event Log |
8168e71f | 1441 | |
a650b841 AT |
1442 | Windows Event Log, |
1443 | L<http://msdn.microsoft.com/library/default.asp?url=/library/en-us/wes/wes/windows_event_log.asp> | |
5be1dfc7 | 1444 | |
a650b841 AT |
1445 | |
1446 | =head1 AUTHORS & ACKNOWLEDGEMENTS | |
1447 | ||
1448 | Tom Christiansen E<lt>F<tchrist (at) perl.com>E<gt> and Larry Wall | |
1449 | E<lt>F<larry (at) wall.org>E<gt>. | |
150b260b GS |
1450 | |
1451 | UNIX domain sockets added by Sean Robinson | |
a650b841 AT |
1452 | E<lt>F<robinson_s (at) sc.maricopa.edu>E<gt> with support from Tim Bunce |
1453 | E<lt>F<Tim.Bunce (at) ig.co.uk>E<gt> and the C<perl5-porters> mailing list. | |
150b260b GS |
1454 | |
1455 | Dependency on F<syslog.ph> replaced with XS code by Tom Hughes | |
a650b841 | 1456 | E<lt>F<tom (at) compton.nu>E<gt>. |
5be1dfc7 | 1457 | |
a650b841 | 1458 | Code for C<constant()>s regenerated by Nicholas Clark E<lt>F<nick (at) ccl4.org>E<gt>. |
23642f4b NW |
1459 | |
1460 | Failover to different communication modes by Nick Williams | |
a650b841 AT |
1461 | E<lt>F<Nick.Williams (at) morganstanley.com>E<gt>. |
1462 | ||
1463 | Extracted from core distribution for publishing on the CPAN by | |
1464 | SE<eacute>bastien Aperghis-Tramoni E<lt>sebastien (at) aperghis.netE<gt>. | |
b903fcff | 1465 | |
89c3c464 | 1466 | XS code for using native C functions borrowed from C<L<Unix::Syslog>>, |
a650b841 | 1467 | written by Marcus Harnisch E<lt>F<marcus.harnisch (at) gmx.net>E<gt>. |
89c3c464 | 1468 | |
a650b841 AT |
1469 | Yves Orton suggested and helped for making C<Sys::Syslog> use the native |
1470 | event logger under Win32 systems. | |
1471 | ||
1472 | Jerry D. Hedden and Reini Urban provided greatly appreciated help to | |
1473 | debug and polish C<Sys::Syslog> under Cygwin. | |
8168e71f SP |
1474 | |
1475 | ||
1476 | =head1 BUGS | |
1477 | ||
1478 | Please report any bugs or feature requests to | |
a650b841 | 1479 | C<bug-sys-syslog (at) rt.cpan.org>, or through the web interface at |
35a209d1 | 1480 | L<http://rt.cpan.org/Public/Dist/Display.html?Name=Sys-Syslog>. |
8168e71f SP |
1481 | I will be notified, and then you'll automatically be notified of progress on |
1482 | your bug as I make changes. | |
1483 | ||
1484 | ||
1485 | =head1 SUPPORT | |
1486 | ||
1487 | You can find documentation for this module with the perldoc command. | |
1488 | ||
1489 | perldoc Sys::Syslog | |
1490 | ||
1491 | You can also look for information at: | |
1492 | ||
1493 | =over 4 | |
1494 | ||
1495 | =item * AnnoCPAN: Annotated CPAN documentation | |
1496 | ||
1497 | L<http://annocpan.org/dist/Sys-Syslog> | |
1498 | ||
1499 | =item * CPAN Ratings | |
1500 | ||
1501 | L<http://cpanratings.perl.org/d/Sys-Syslog> | |
1502 | ||
1503 | =item * RT: CPAN's request tracker | |
1504 | ||
1505 | L<http://rt.cpan.org/NoAuth/Bugs.html?Dist=Sys-Syslog> | |
1506 | ||
1507 | =item * Search CPAN | |
1508 | ||
6e4ef777 SP |
1509 | L<http://search.cpan.org/dist/Sys-Syslog/> |
1510 | ||
1511 | =item * Kobes' CPAN Search | |
1512 | ||
1513 | L<http://cpan.uwinnipeg.ca/dist/Sys-Syslog> | |
1514 | ||
1515 | =item * Perl Documentation | |
1516 | ||
1517 | L<http://perldoc.perl.org/Sys/Syslog.html> | |
8168e71f SP |
1518 | |
1519 | =back | |
1520 | ||
1521 | ||
35a209d1 AT |
1522 | =head1 COPYRIGHT |
1523 | ||
f93f88eb | 1524 | Copyright (C) 1990-2008 by Larry Wall and others. |
35a209d1 AT |
1525 | |
1526 | ||
8168e71f SP |
1527 | =head1 LICENSE |
1528 | ||
1529 | This program is free software; you can redistribute it and/or modify it | |
1530 | under the same terms as Perl itself. | |
1531 | ||
5be1dfc7 | 1532 | =cut |
a650b841 AT |
1533 | |
1534 | =begin comment | |
1535 | ||
1536 | Notes for the future maintainer (even if it's still me..) | |
1537 | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | |
1538 | ||
1539 | Using Google Code Search, I search who on Earth was relying on $host being | |
1540 | public. It found 5 hits: | |
1541 | ||
1542 | * First was inside Indigo Star Perl2exe documentation. Just an old version | |
1543 | of Sys::Syslog. | |
1544 | ||
1545 | ||
1546 | * One real hit was inside DalWeathDB, a weather related program. It simply | |
1547 | does a | |
1548 | ||
1549 | $Sys::Syslog::host = '127.0.0.1'; | |
1550 | ||
1551 | - L<http://www.gallistel.net/nparker/weather/code/> | |
1552 | ||
1553 | ||
1554 | * Two hits were in TPC, a fax server thingy. It does a | |
1555 | ||
1556 | $Sys::Syslog::host = $TPC::LOGHOST; | |
1557 | ||
1558 | but also has this strange piece of code: | |
1559 | ||
1560 | # work around perl5.003 bug | |
1561 | sub Sys::Syslog::hostname {} | |
1562 | ||
1563 | I don't know what bug the author referred to. | |
1564 | ||
1565 | - L<http://www.tpc.int/> | |
1566 | - L<ftp://ftp.tpc.int/tpc/server/UNIX/> | |
1567 | - L<ftp://ftp-usa.tpc.int/pub/tpc/server/UNIX/> | |
1568 | ||
1569 | ||
1570 | * Last hit was in Filefix, which seems to be a FIDOnet mail program (!). | |
1571 | This one does not use $host, but has the following piece of code: | |
1572 | ||
1573 | sub Sys::Syslog::hostname | |
1574 | { | |
1575 | use Sys::Hostname; | |
1576 | return hostname; | |
1577 | } | |
1578 | ||
1579 | I guess this was a more elaborate form of the previous bit, maybe because | |
1580 | of a bug in Sys::Syslog back then? | |
1581 | ||
1582 | - L<ftp://ftp.kiae.su/pub/unix/fido/> | |
1583 | ||
d329efa2 AT |
1584 | |
1585 | Links | |
1586 | ----- | |
f93f88eb AT |
1587 | Linux Fast-STREAMS |
1588 | - L<http://www.openss7.org/streams.html> | |
1589 | ||
d329efa2 AT |
1590 | II12021: SYSLOGD HOWTO TCPIPINFO (z/OS, OS/390, MVS) |
1591 | - L<http://www-1.ibm.com/support/docview.wss?uid=isg1II12021> | |
1592 | ||
1593 | Getting the most out of the Event Viewer | |
1594 | - L<http://www.codeproject.com/dotnet/evtvwr.asp?print=true> | |
1595 | ||
1596 | Log events to the Windows NT Event Log with JNI | |
1597 | - L<http://www.javaworld.com/javaworld/jw-09-2001/jw-0928-ntmessages.html> | |
1598 | ||
a650b841 | 1599 | =end comment |
d329efa2 | 1600 |