diff options
Diffstat (limited to 'man2/msgctl.2')
| -rw-r--r-- | man2/msgctl.2 | 65 |
1 files changed, 34 insertions, 31 deletions
diff --git a/man2/msgctl.2 b/man2/msgctl.2 index bfdc7f25d..432ecd7a9 100644 --- a/man2/msgctl.2 +++ b/man2/msgctl.2 @@ -60,19 +60,16 @@ data structure is defined in \fI<sys/msg.h>\fP as follows: .in +4n .EX struct msqid_ds { - struct ipc_perm msg_perm; /* Ownership and permissions */ - time_t msg_stime; /* Time of last msgsnd(2) */ - time_t msg_rtime; /* Time of last msgrcv(2) */ - time_t msg_ctime; /* Creation time/time of last - modification via msgctl() */ - unsigned long __msg_cbytes; /* Current number of bytes in - queue (nonstandard) */ - msgqnum_t msg_qnum; /* Current number of messages - in queue */ - msglen_t msg_qbytes; /* Maximum number of bytes - allowed in queue */ - pid_t msg_lspid; /* PID of last msgsnd(2) */ - pid_t msg_lrpid; /* PID of last msgrcv(2) */ + struct ipc_perm msg_perm; /* Ownership and permissions */ + time_t msg_stime; /* Time of last msgsnd(2) */ + time_t msg_rtime; /* Time of last msgrcv(2) */ + time_t msg_ctime; /* Time of creation or last + modification by msgctl() */ + unsigned long msg_cbytes; /* # of bytes in queue */ + msgqnum_t msg_qnum; /* # number of messages in queue */ + msglen_t msg_qbytes; /* Maximum # of bytes in queue */ + pid_t msg_lspid; /* PID of last msgsnd(2) */ + pid_t msg_lrpid; /* PID of last msgrcv(2) */ }; .EE .in @@ -87,6 +84,26 @@ This is an structure (see below) that specifies the access permissions on the message queue. .TP +.I msg_stime +Time of the last +.BR msgsnd (2) +system call. +.TP +.I msg_rtime +Time of the last +.BR msgrcv (2) +system call. +.TP +.I msg_ctime +Time of creation of queue or time of last +.BR msgctl () +.BR IPC_SET +operation. +.TP +.I msg_cbytes +Number of bytes in all messages currently on the message queue. +This is a nonstandard Linux extension that is not specified in POSIX. +.TP .I msg_qnum Number of messages currently on the message queue. .TP @@ -103,22 +120,6 @@ system call. ID of the process that performed the last .BR msgrcv (2) system call. -.TP -.I msg_stime -Time of the last -.BR msgsnd (2) -system call. -.TP -.I msg_rtime -Time of the last -.BR msgrcv (2) -system call. -.TP -.I msg_ctime -Time of creation of queue or time of last -.BR msgctl () -.BR IPC_SET -operation. .PP The .I ipc_perm @@ -180,12 +181,14 @@ to the kernel data structure associated with this message queue, updating also its .I msg_ctime member. +.IP The following members of the structure are updated: .IR msg_qbytes , .IR msg_perm.uid , .IR msg_perm.gid , and (the least significant 9 bits of) .IR msg_perm.mode . +.IP The effective UID of the calling process must match the owner .RI ( msg_perm.uid ) or creator @@ -421,7 +424,7 @@ to include these header files. .PP The .BR IPC_INFO , -.B MSG_STAT +.BR MSG_STAT , and .B MSG_INFO operations are used by the @@ -452,7 +455,7 @@ flag in .BR mq_overview (7), .BR sysvipc (7) .SH COLOPHON -This page is part of release 5.09 of the Linux +This page is part of release 5.10 of the Linux .I man-pages project. A description of the project, |