Commit | Line | Data |
---|---|---|
0f85fab0 LW |
1 | # |
2 | # syslog.pl | |
3 | # | |
395c3793 | 4 | # $Log: syslog.pl,v $ |
79072805 | 5 | # |
0f85fab0 LW |
6 | # tom christiansen <tchrist@convex.com> |
7 | # modified to use sockets by Larry Wall <lwall@jpl-devvax.jpl.nasa.gov> | |
8 | # NOTE: openlog now takes three arguments, just like openlog(3) | |
9 | # | |
10 | # call syslog() with a string priority and a list of printf() args | |
11 | # like syslog(3) | |
12 | # | |
e929a76b | 13 | # usage: require 'syslog.pl'; |
0f85fab0 LW |
14 | # |
15 | # then (put these all in a script to test function) | |
16 | # | |
17 | # | |
18 | # do openlog($program,'cons,pid','user'); | |
19 | # do syslog('info','this is another test'); | |
395c3793 | 20 | # do syslog('mail|warning','this is a better test: %d', time); |
0f85fab0 LW |
21 | # do closelog(); |
22 | # | |
23 | # do syslog('debug','this is the last test'); | |
24 | # do openlog("$program $$",'ndelay','user'); | |
25 | # do syslog('notice','fooprogram: this is really done'); | |
26 | # | |
27 | # $! = 55; | |
28 | # do syslog('info','problem was %m'); # %m == $! in syslog(3) | |
29 | ||
30 | package syslog; | |
31 | ||
32 | $host = 'localhost' unless $host; # set $syslog'host to change | |
33 | ||
cb1a09d0 | 34 | if ($] >= 5) { |
4a6b6a6c | 35 | warn "You should 'use Sys::Syslog' instead; continuing" # if $^W |
cb1a09d0 AD |
36 | } |
37 | ||
34de22dd | 38 | require 'syslog.ph'; |
395c3793 | 39 | |
8e4ea0b4 | 40 | eval 'use Socket; 1' || |
4a6b6a6c | 41 | eval { require "socket.ph" } || |
42 | require "sys/socket.ph"; | |
cb1a09d0 | 43 | |
395c3793 | 44 | $maskpri = &LOG_UPTO(&LOG_DEBUG); |
0f85fab0 LW |
45 | |
46 | sub main'openlog { | |
47 | ($ident, $logopt, $facility) = @_; # package vars | |
48 | $lo_pid = $logopt =~ /\bpid\b/; | |
49 | $lo_ndelay = $logopt =~ /\bndelay\b/; | |
395c3793 | 50 | $lo_cons = $logopt =~ /\bcons\b/; |
0f85fab0 LW |
51 | $lo_nowait = $logopt =~ /\bnowait\b/; |
52 | &connect if $lo_ndelay; | |
53 | } | |
54 | ||
55 | sub main'closelog { | |
56 | $facility = $ident = ''; | |
57 | &disconnect; | |
58 | } | |
395c3793 LW |
59 | |
60 | sub main'setlogmask { | |
61 | local($oldmask) = $maskpri; | |
62 | $maskpri = shift; | |
63 | $oldmask; | |
64 | } | |
0f85fab0 LW |
65 | |
66 | sub main'syslog { | |
67 | local($priority) = shift; | |
68 | local($mask) = shift; | |
69 | local($message, $whoami); | |
395c3793 LW |
70 | local(@words, $num, $numpri, $numfac, $sum); |
71 | local($facility) = $facility; # may need to change temporarily. | |
0f85fab0 | 72 | |
395c3793 | 73 | die "syslog: expected both priority and mask" unless $mask && $priority; |
0f85fab0 | 74 | |
395c3793 LW |
75 | @words = split(/\W+/, $priority, 2);# Allow "level" or "level|facility". |
76 | undef $numpri; | |
77 | undef $numfac; | |
78 | foreach (@words) { | |
79 | $num = &xlate($_); # Translate word to number. | |
80 | if (/^kern$/ || $num < 0) { | |
81 | die "syslog: invalid level/facility: $_\n"; | |
82 | } | |
83 | elsif ($num <= &LOG_PRIMASK) { | |
84 | die "syslog: too many levels given: $_\n" if defined($numpri); | |
85 | $numpri = $num; | |
86 | return 0 unless &LOG_MASK($numpri) & $maskpri; | |
87 | } | |
88 | else { | |
89 | die "syslog: too many facilities given: $_\n" if defined($numfac); | |
90 | $facility = $_; | |
91 | $numfac = $num; | |
92 | } | |
93 | } | |
0f85fab0 | 94 | |
395c3793 LW |
95 | die "syslog: level must be given\n" unless defined($numpri); |
96 | ||
97 | if (!defined($numfac)) { # Facility not specified in this call. | |
98 | $facility = 'user' unless $facility; | |
99 | $numfac = &xlate($facility); | |
100 | } | |
101 | ||
102 | &connect unless $connected; | |
0f85fab0 | 103 | |
395c3793 | 104 | $whoami = $ident; |
0f85fab0 LW |
105 | |
106 | if (!$ident && $mask =~ /^(\S.*):\s?(.*)/) { | |
107 | $whoami = $1; | |
108 | $mask = $2; | |
109 | } | |
395c3793 LW |
110 | |
111 | unless ($whoami) { | |
112 | ($whoami = getlogin) || | |
113 | ($whoami = getpwuid($<)) || | |
114 | ($whoami = 'syslog'); | |
115 | } | |
116 | ||
117 | $whoami .= "[$$]" if $lo_pid; | |
0f85fab0 LW |
118 | |
119 | $mask =~ s/%m/$!/g; | |
120 | $mask .= "\n" unless $mask =~ /\n$/; | |
121 | $message = sprintf ($mask, @_); | |
122 | ||
395c3793 | 123 | $sum = $numpri + $numfac; |
0f85fab0 LW |
124 | unless (send(SYSLOG,"<$sum>$whoami: $message",0)) { |
125 | if ($lo_cons) { | |
126 | if ($pid = fork) { | |
127 | unless ($lo_nowait) { | |
128 | do {$died = wait;} until $died == $pid || $died < 0; | |
129 | } | |
130 | } | |
131 | else { | |
132 | open(CONS,">/dev/console"); | |
395c3793 | 133 | print CONS "<$facility.$priority>$whoami: $message\r"; |
0f85fab0 LW |
134 | exit if defined $pid; # if fork failed, we're parent |
135 | close CONS; | |
136 | } | |
137 | } | |
138 | } | |
139 | } | |
140 | ||
141 | sub xlate { | |
142 | local($name) = @_; | |
55497cff | 143 | $name = uc $name; |
0f85fab0 LW |
144 | $name = "LOG_$name" unless $name =~ /^LOG_/; |
145 | $name = "syslog'$name"; | |
36477c24 | 146 | defined &$name ? &$name : -1; |
0f85fab0 LW |
147 | } |
148 | ||
149 | sub connect { | |
150 | $pat = 'S n C4 x8'; | |
151 | ||
cb1a09d0 AD |
152 | $af_unix = &AF_UNIX; |
153 | $af_inet = &AF_INET; | |
0f85fab0 | 154 | |
cb1a09d0 AD |
155 | $stream = &SOCK_STREAM; |
156 | $datagram = &SOCK_DGRAM; | |
0f85fab0 LW |
157 | |
158 | ($name,$aliases,$proto) = getprotobyname('udp'); | |
159 | $udp = $proto; | |
160 | ||
cb1a09d0 | 161 | ($name,$aliases,$port,$proto) = getservbyname('syslog','udp'); |
0f85fab0 LW |
162 | $syslog = $port; |
163 | ||
164 | if (chop($myname = `hostname`)) { | |
165 | ($name,$aliases,$addrtype,$length,@addrs) = gethostbyname($myname); | |
166 | die "Can't lookup $myname\n" unless $name; | |
167 | @bytes = unpack("C4",$addrs[0]); | |
168 | } | |
169 | else { | |
170 | @bytes = (0,0,0,0); | |
171 | } | |
172 | $this = pack($pat, $af_inet, 0, @bytes); | |
173 | ||
174 | if ($host =~ /^\d+\./) { | |
175 | @bytes = split(/\./,$host); | |
176 | } | |
177 | else { | |
178 | ($name,$aliases,$addrtype,$length,@addrs) = gethostbyname($host); | |
179 | die "Can't lookup $host\n" unless $name; | |
180 | @bytes = unpack("C4",$addrs[0]); | |
181 | } | |
182 | $that = pack($pat,$af_inet,$syslog,@bytes); | |
183 | ||
184 | socket(SYSLOG,$af_inet,$datagram,$udp) || die "socket: $!\n"; | |
185 | bind(SYSLOG,$this) || die "bind: $!\n"; | |
186 | connect(SYSLOG,$that) || die "connect: $!\n"; | |
187 | ||
188 | local($old) = select(SYSLOG); $| = 1; select($old); | |
189 | $connected = 1; | |
190 | } | |
191 | ||
192 | sub disconnect { | |
193 | close SYSLOG; | |
194 | $connected = 0; | |
195 | } | |
196 | ||
197 | 1; |