LDP
/
man-pages
mirror of https://github.com/mkerrisk/man-pages
0
1
Fork 0
Code Releases Activity

copy_file_range: glibc provides a user-space emulation where the system call is absent 

Signed-off-by: Shawn Landden <slandden@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Shawn Landden 2017-12-31 20:12:59 -08:00 committed by Michael Kerrisk
parent 36f69b24e2
commit 78ab0c7ba9
1 changed files with 5 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
man2/copy_file_range.2
View File

@ -27,7 +27,7 @@
copy_file_range \- Copy a range of data from one file to another
.SH SYNOPSIS
.nf
.B #include <sys/syscall.h>
.B #define _GNU_SOURCE
.B #include <unistd.h>
.PP
.BI "ssize_t copy_file_range(int " fd_in ", loff_t *" off_in ,
@ -135,12 +135,13 @@ are not on the same mounted filesystem.
.SH VERSIONS
The
.BR copy_file_range ()
system call first appeared in Linux 4.5.
Library support was added in glibc 2.27.
system call first appeared in Linux 4.5, but glibc 2.27 provides a user-space
emulation when it is not available.
.\" https://sourceware.org/git/?p=glibc.git;a=commit;f=posix/unistd.h;h=bad7a0c81f501fbbcc79af9eaa4b8254441c4a1f
.SH CONFORMING TO
The
.BR copy_file_range ()
system call is a nonstandard Linux extension.
system call is a nonstandard Linux and GNU extension.
.SH NOTES
If
.I file_in