diff options
Diffstat (limited to 'man2/sendfile.2')
| -rw-r--r-- | man2/sendfile.2 | 45 |
1 files changed, 21 insertions, 24 deletions
diff --git a/man2/sendfile.2 b/man2/sendfile.2 index 07a2c5b35d..5574eff2b4 100644 --- a/man2/sendfile.2 +++ b/man2/sendfile.2 @@ -165,34 +165,15 @@ the input file or the output file. .I offset is not NULL but the input file is not seekable. .SH VERSIONS -.BR sendfile () -first appeared in Linux 2.2. -The include file -.I <sys/sendfile.h> -is present since glibc 2.1. -.SH STANDARDS -Not specified in POSIX.1-2001, nor in other standards. -.PP Other UNIX systems implement .BR sendfile () with different semantics and prototypes. It should not be used in portable programs. -.SH NOTES -.BR sendfile () -will transfer at most 0x7ffff000 (2,147,479,552) bytes, -returning the number of bytes actually transferred. -.\" commit e28cc71572da38a5a12c1cfe4d7032017adccf69 -(This is true on both 32-bit and 64-bit systems.) -.PP -If you plan to use -.BR sendfile () -for sending files to a TCP socket, but need -to send some header data in front of the file contents, you will find -it useful to employ the -.B TCP_CORK -option, described in -.BR tcp (7), -to minimize the number of packets and to tune performance. +.SH STANDARDS +None. +.SH HISTORY +Linux 2.2, +glibc 2.1. .PP In Linux 2.4 and earlier, .I out_fd @@ -211,6 +192,22 @@ argument. The glibc .BR sendfile () wrapper function transparently deals with the kernel differences. +.SH NOTES +.BR sendfile () +will transfer at most 0x7ffff000 (2,147,479,552) bytes, +returning the number of bytes actually transferred. +.\" commit e28cc71572da38a5a12c1cfe4d7032017adccf69 +(This is true on both 32-bit and 64-bit systems.) +.PP +If you plan to use +.BR sendfile () +for sending files to a TCP socket, but need +to send some header data in front of the file contents, you will find +it useful to employ the +.B TCP_CORK +option, described in +.BR tcp (7), +to minimize the number of packets and to tune performance. .PP Applications may wish to fall back to .BR read (2) |
