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Diffstat (limited to 'man2/write.2')
| -rw-r--r-- | man2/write.2 | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/man2/write.2 b/man2/write.2 index 90ef9b5994..3e8c363ab9 100644 --- a/man2/write.2 +++ b/man2/write.2 @@ -89,6 +89,10 @@ Note that not all filesystems are POSIX conforming. .SH RETURN VALUE On success, the number of bytes written is returned (zero indicates nothing was written). +It is not an error if this number is smaller than the number of bytes +requested; this may happen for example because the disk device was filled. +See also NOTES. + On error, \-1 is returned, and \fIerrno\fP is set appropriately. @@ -217,6 +221,14 @@ then the call fails with the error .BR EINTR ; if it is interrupted after at least one byte has been written, the call succeeds, and returns the number of bytes written. + +On Linux, +.BR read () +(and similar system calls) 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.) .SH BUGS According to POSIX.1-2008/SUSv4 Section XSI 2.9.7 ("Thread Interactions with Regular File Operations"): |