qbit/go
1
0
Fork 0
mirror of https://github.com/golang/go synced 2024-11-26 17:07:09 -07:00
Code Releases Activity

os: Plan 9: avoid doing zero-length writes.

Browse Source 
Plan 9 I/O preserves message boundaries, while Go
library code is written for UNIX-like operating
systems which do not. Avoid doing zero-length
writes in package os.

R=rsc, rminnich, ality, rminnich, r
CC=golang-dev
https://golang.org/cl/7406046
This commit is contained in:
Akshat Kumar 2013-02-22 23:06:25 +01:00 committed by Ron Minnich
parent 56a0bafdb6
commit 722ee1f479
1 changed files with 10 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
src/pkg/os/file_plan9.go
View File

@ -244,13 +244,23 @@ func (f *File) pread(b []byte, off int64) (n int, err error) {
// write writes len(b) bytes to the File.
// It returns the number of bytes written and an error, if any.
// Since Plan 9 preserves message boundaries, never allow
// a zero-byte write.
func (f *File) write(b []byte) (n int, err error) {
if len(b) == 0 {
return 0, nil
}
return syscall.Write(f.fd, b)
}
// pwrite writes len(b) bytes to the File starting at byte offset off.
// It returns the number of bytes written and an error, if any.
// Since Plan 9 preserves message boundaries, never allow
// a zero-byte write.
func (f *File) pwrite(b []byte, off int64) (n int, err error) {
if len(b) == 0 {
return 0, nil
}
return syscall.Pwrite(f.fd, b, off)
}