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| author | Michael Kerrisk <mtk.manpages@gmail.com> | 2014-02-11 11:13:36 +0100 |
|---|---|---|
| committer | Michael Kerrisk <mtk.manpages@gmail.com> | 2014-02-11 11:13:36 +0100 |
| commit | 9798ddfd58eabb7c7e706d7dffb66accf942d138 (patch) | |
| tree | ab31041f5a6937ee7d27466691f513c50cb1058f | |
| parent | ea62994487591c3b4ca4eabbee3a5e8d44764a44 (diff) | |
| download | man-pages-9798ddfd58eabb7c7e706d7dffb66accf942d138.tar.gz | |
recv.2: Describe the various cases where the return value can be 0
Reported-by: 未卷起的浪 <ayjj_8109@qq.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
| -rw-r--r-- | man2/recv.2 | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/man2/recv.2 b/man2/recv.2 index 884862a5ea..45dba6b1d0 100644 --- a/man2/recv.2 +++ b/man2/recv.2 @@ -403,8 +403,16 @@ if an error occurred. In the event of an error, .I errno is set to indicate the error. -The return value will be 0 when the -peer has performed an orderly shutdown. + +When a stream socket peer has performed an orderly shutdown, +the return value will be 0 (the traditional "end-of-file" return). + +Datagram sockets in various domains (e.g., the UNIX and Internet domains) +permit zero-length datagrams. +When such a datagram is received, the return value is 0. + +The value 0 may also be returned if the requested number of bytes +to receive from a stream socket was 0. .SH ERRORS These are some standard errors generated by the socket layer. Additional errors |