read.2: Clarify details for seekable files

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2013-02-12 22:25:08 +01:00 · 2013-02-12 22:25:08 +01:00 · dc0e450b3e
parent 45e97e2ac5
commit dc0e450b3e
1 changed files with 9 additions and 1 deletions
--- a/man2/read.2
+++ b/man2/read.2
@ -49,7 +49,15 @@ bytes from file descriptor
 .I fd
 into the buffer starting at
 .IR buf .
-.PP
+
+On files that support seeking,
+the read operation commences at the current file offset,
+and the file offset is incremented by the number of bytes read.
+If the current file offset is at or past the end of file,
+no bytes are read, and
+.BR read ()
+returns zero.
+
 If
 .I count
 is zero,