lookup_dcookie.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 19:55:27 +02:00 committed by Michael Kerrisk
parent aecad91d0b
commit 3977e9ff1f
1 changed files with 9 additions and 5 deletions

View File

@ -29,11 +29,18 @@
lookup_dcookie \- return a directory entry's path
.SH SYNOPSIS
.nf
.BI "int lookup_dcookie(uint64_t " cookie ", char *" buffer ", size_t " len );
.BR "#include <sys/syscall.h>" " /* Definition of " SYS_* " constants */"
.B #include <unistd.h>
.PP
.BI "int syscall(SYS_lookup_dcookie, uint64_t " cookie ", char *" buffer ,
.BI " size_t " len );
.fi
.PP
.IR Note :
There is no glibc wrapper for this system call; see NOTES.
glibc provides no wrapper for
.BR lookup_dcookie (),
necessitating the use of
.BR syscall (2).
.SH DESCRIPTION
Look up the full path of the directory entry specified by the value
.IR cookie .
@ -92,8 +99,5 @@ It relies on a kernel driver to register cookies for directory entries.
.PP
The path returned may be suffixed by the string " (deleted)" if the directory
entry has been removed.
.PP
Glibc does not provide a wrapper for this system call; call it using
.BR syscall (2).
.SH SEE ALSO
.BR oprofile (1)