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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. |