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openat2.2: Use syscall(SYS_...); for system calls without a wrapper; fix includes too 

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 19:55:36 +02:00 committed by Michael Kerrisk
parent bc2813df5e
commit 10f4414ccb
1 changed files with 11 additions and 9 deletions
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20
man2/openat2.2
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@ -26,16 +26,21 @@
openat2 \- open and possibly create a file (extended)
.SH SYNOPSIS
.nf
.B #include <sys/stat.h>
.B #include <fcntl.h>
.B #include <linux/openat2.h>
.BR "#include <fcntl.h>" \
" /* Definition of " O_* " and " S_* " constants */"
.BR "#include <linux/openat2.h>" " /* Definition of " RESOLVE_* " constants */"
.BR "#include <sys/syscall.h>" " /* Definition of " SYS_* " constants */"
.B #include <unistd.h>
.PP
.BI "long openat2(int " dirfd ", const char *" pathname ,
.BI " struct open_how *" how ", size_t " size );
.BI "long syscall(SYS_openat2, int " dirfd ", const char *" pathname ,
.BI " struct open_how *" how ", size_t " size );
.fi
.PP
.IR Note :
There is no glibc wrapper for this system call; see NOTES.
glibc provides no wrapper for
.BR openat2 (),
necessitating the use of
.BR syscall (2).
.SH DESCRIPTION
The
.BR openat2 ()
@ -494,9 +499,6 @@ The semantics of
were modeled after FreeBSD's
.BR O_BENEATH .
.SH NOTES
Glibc does not provide a wrapper for this system call; call it using
.BR syscall (2).
.\"
.SS Extensibility
In order to allow for future extensibility,
.BR openat2 ()