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getdents.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 19:55:11 +02:00 committed by Michael Kerrisk
parent 0aa385fe25
commit 4b63cf3ca7
1 changed files with 15 additions and 5 deletions
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20
man2/getdents.2
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@ -33,19 +33,29 @@
getdents, getdents64 \- get directory entries
.SH SYNOPSIS
.nf
.BI "long getdents(unsigned int " fd ", struct linux_dirent *" dirp ,
.BR "#include <sys/syscall.h>" " /* Definition of " SYS_* " constants */"
.B #include <unistd.h>
.PP
.BI "long syscall(SYS_getdents, unsigned int " fd \
", struct linux_dirent *" dirp ,
.BI " unsigned int " count );
.PP
.BR "#define _GNU_SOURCE" " /* See feature_test_macros(7) */"
.BR "#define _GNU_SOURCE" " /* See feature_test_macros(7) */"
.BR "#include <dirent.h>"
.PP
.BI "ssize_t getdents64(int " fd ", void *" dirp ", size_t " count );
.fi
.PP
.IR Note :
There is no glibc wrapper for
.BR getdents ();
see NOTES.
glibc provides no wrapper for
.BR getdents (),
necessitating the use of
.BR syscall (2).
.PP
.IR Note :
There is no definition of
.B struct linux_dirent
in glibc; see NOTES.
.SH DESCRIPTION
These are not the interfaces you are interested in.
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