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129 | .\" ======================================================================== | |
130 | .\" | |
131 | .IX Title "IPC::Msg 3" | |
132 | .TH IPC::Msg 3 "2001-09-21" "perl v5.8.8" "Perl Programmers Reference Guide" | |
133 | .SH "NAME" | |
134 | IPC::Msg \- SysV Msg IPC object class | |
135 | .SH "SYNOPSIS" | |
136 | .IX Header "SYNOPSIS" | |
137 | .Vb 2 | |
138 | \& use IPC::SysV qw(IPC_PRIVATE S_IRWXU); | |
139 | \& use IPC::Msg; | |
140 | .Ve | |
141 | .PP | |
142 | .Vb 1 | |
143 | \& $msg = new IPC::Msg(IPC_PRIVATE, S_IRWXU); | |
144 | .Ve | |
145 | .PP | |
146 | .Vb 1 | |
147 | \& $msg->snd(pack("l! a*",$msgtype,$msg)); | |
148 | .Ve | |
149 | .PP | |
150 | .Vb 1 | |
151 | \& $msg->rcv($buf,256); | |
152 | .Ve | |
153 | .PP | |
154 | .Vb 1 | |
155 | \& $ds = $msg->stat; | |
156 | .Ve | |
157 | .PP | |
158 | .Vb 1 | |
159 | \& $msg->remove; | |
160 | .Ve | |
161 | .SH "DESCRIPTION" | |
162 | .IX Header "DESCRIPTION" | |
163 | A class providing an object based interface to SysV \s-1IPC\s0 message queues. | |
164 | .SH "METHODS" | |
165 | .IX Header "METHODS" | |
166 | .IP "new ( \s-1KEY\s0 , \s-1FLAGS\s0 )" 4 | |
167 | .IX Item "new ( KEY , FLAGS )" | |
168 | Creates a new message queue associated with \f(CW\*(C`KEY\*(C'\fR. A new queue is | |
169 | created if | |
170 | .RS 4 | |
171 | .IP "*" 4 | |
172 | \&\f(CW\*(C`KEY\*(C'\fR is equal to \f(CW\*(C`IPC_PRIVATE\*(C'\fR | |
173 | .IP "*" 4 | |
174 | \&\f(CW\*(C`KEY\*(C'\fR does not already have a message queue | |
175 | associated with it, and \f(CW\*(C`\f(CI\s-1FLAGS\s0\f(CW & IPC_CREAT\*(C'\fR is true. | |
176 | .RE | |
177 | .RS 4 | |
178 | .Sp | |
179 | On creation of a new message queue \f(CW\*(C`FLAGS\*(C'\fR is used to set the | |
180 | permissions. | |
181 | .RE | |
182 | .IP "id" 4 | |
183 | .IX Item "id" | |
184 | Returns the system message queue identifier. | |
185 | .IP "rcv ( \s-1BUF\s0, \s-1LEN\s0 [, \s-1TYPE\s0 [, \s-1FLAGS\s0 ]] )" 4 | |
186 | .IX Item "rcv ( BUF, LEN [, TYPE [, FLAGS ]] )" | |
187 | Read a message from the queue. Returns the type of the message read. | |
188 | See msgrcv. The \s-1BUF\s0 becomes tainted. | |
189 | .IP "remove" 4 | |
190 | .IX Item "remove" | |
191 | Remove and destroy the message queue from the system. | |
192 | .IP "set ( \s-1STAT\s0 )" 4 | |
193 | .IX Item "set ( STAT )" | |
194 | .PD 0 | |
195 | .IP "set ( \s-1NAME\s0 => \s-1VALUE\s0 [, \s-1NAME\s0 => \s-1VALUE\s0 ...] )" 4 | |
196 | .IX Item "set ( NAME => VALUE [, NAME => VALUE ...] )" | |
197 | .PD | |
198 | \&\f(CW\*(C`set\*(C'\fR will set the following values of the \f(CW\*(C`stat\*(C'\fR structure associated | |
199 | with the message queue. | |
200 | .Sp | |
201 | .Vb 4 | |
202 | \& uid | |
203 | \& gid | |
204 | \& mode (oly the permission bits) | |
205 | \& qbytes | |
206 | .Ve | |
207 | .Sp | |
208 | \&\f(CW\*(C`set\*(C'\fR accepts either a stat object, as returned by the \f(CW\*(C`stat\*(C'\fR method, | |
209 | or a list of \fIname\fR\-\fIvalue\fR pairs. | |
210 | .IP "snd ( \s-1TYPE\s0, \s-1MSG\s0 [, \s-1FLAGS\s0 ] )" 4 | |
211 | .IX Item "snd ( TYPE, MSG [, FLAGS ] )" | |
212 | Place a message on the queue with the data from \f(CW\*(C`MSG\*(C'\fR and with type \f(CW\*(C`TYPE\*(C'\fR. | |
213 | See msgsnd. | |
214 | .IP "stat" 4 | |
215 | .IX Item "stat" | |
216 | Returns an object of type \f(CW\*(C`IPC::Msg::stat\*(C'\fR which is a sub-class of | |
217 | \&\f(CW\*(C`Class::Struct\*(C'\fR. It provides the following fields. For a description | |
218 | of these fields see you system documentation. | |
219 | .Sp | |
220 | .Vb 12 | |
221 | \& uid | |
222 | \& gid | |
223 | \& cuid | |
224 | \& cgid | |
225 | \& mode | |
226 | \& qnum | |
227 | \& qbytes | |
228 | \& lspid | |
229 | \& lrpid | |
230 | \& stime | |
231 | \& rtime | |
232 | \& ctime | |
233 | .Ve | |
234 | .SH "SEE ALSO" | |
235 | .IX Header "SEE ALSO" | |
236 | IPC::SysV Class::Struct | |
237 | .SH "AUTHOR" | |
238 | .IX Header "AUTHOR" | |
239 | Graham Barr <gbarr@pobox.com> | |
240 | .SH "COPYRIGHT" | |
241 | .IX Header "COPYRIGHT" | |
242 | Copyright (c) 1997 Graham Barr. All rights reserved. | |
243 | This program is free software; you can redistribute it and/or modify it | |
244 | under the same terms as Perl itself. |