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ipc.2: Use syscall(SYS_...); for system calls without a wrapper 

Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Alejandro Colomar 2021-05-10 19:55:18 +02:00 committed by Michael Kerrisk
parent 0d961e8818
commit acb2e04c24
1 changed files with 11 additions and 7 deletions
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18
man2/ipc.2
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@ -27,12 +27,20 @@
ipc \- System V IPC system calls
.SH SYNOPSIS
.nf
.BI "int ipc(unsigned int " call ", int " first ", unsigned long " second ,
.BI " unsigned long " third ", void *" ptr ", long " fifth );
.BR "#include <sys/syscall.h>" " /* Definition of " SYS_* " constants */"
.B #include <unistd.h>
.PP
.BI "int syscall(SYS_ipc, unsigned int " call ", int " first ,
.BI " unsigned long " second ", unsigned long " third \
", void *" ptr ,
.BI " long " fifth );
.fi
.PP
.IR Note :
There is no glibc wrapper for this system call; see NOTES.
glibc provides no wrapper for
.BR ipc (),
necessitating the use of
.BR syscall (2).
.SH DESCRIPTION
.BR ipc ()
is a common kernel entry point for the System\ V IPC calls
@ -56,10 +64,6 @@ system call; instead,
.BR semctl (2),
.BR shmctl (2),
and so on really are implemented as separate system calls.
.PP
Glibc does not provide a wrapper for this system call;
in the unlikely event that you want to call it directly, you can do so using
.BR syscall (2).
.SH SEE ALSO
.BR msgctl (2),
.BR msgget (2),