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msgop.2: Note capability required to raise MQ size beyond MSGMNB
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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.\" Added notes on /proc files
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.\" Added notes on /proc files
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.\" FIXME . Add example programs to this page.
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.\" FIXME . Add example programs to this page.
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.\"
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.\"
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.TH MSGOP 2 2014-03-17 "Linux" "Linux Programmer's Manual"
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.TH MSGOP 2 2014-04-28 "Linux" "Linux Programmer's Manual"
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.SH NAME
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.SH NAME
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msgrcv, msgsnd \- System V message queue operations
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msgrcv, msgsnd \- System V message queue operations
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.SH SYNOPSIS
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.SH SYNOPSIS
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@ -507,7 +507,11 @@ Maximum size for a message text: 8192 bytes
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Default maximum size in bytes of a message queue: 16384 bytes
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Default maximum size in bytes of a message queue: 16384 bytes
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(on Linux, this limit can be read and modified via
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(on Linux, this limit can be read and modified via
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.IR /proc/sys/kernel/msgmnb ).
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.IR /proc/sys/kernel/msgmnb ).
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The superuser can increase the size of a message queue beyond
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A privileged process
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(Linux: a process with the
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.B CAP_SYS_RESOURCE
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capability)
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can increase the size of a message queue beyond
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.B MSGMNB
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.B MSGMNB
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by a
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by a
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.BR msgctl (2)
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.BR msgctl (2)
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