diff options
Diffstat (limited to 'src/syscall')
| -rw-r--r-- | src/syscall/syscall_windows.go | 8 | ||||
| -rw-r--r-- | src/syscall/types_windows.go | 4 |
2 files changed, 12 insertions, 0 deletions
diff --git a/src/syscall/syscall_windows.go b/src/syscall/syscall_windows.go index 817eeb6811..3e63897b6b 100644 --- a/src/syscall/syscall_windows.go +++ b/src/syscall/syscall_windows.go @@ -468,6 +468,14 @@ func Open(name string, flag int, perm uint32) (fd Handle, err error) { if flag&O_TRUNC == O_TRUNC && (createmode == OPEN_EXISTING || (createmode == OPEN_ALWAYS && err == ERROR_ALREADY_EXISTS)) { err = Ftruncate(h, 0) + if err == _ERROR_INVALID_PARAMETER { + // ERROR_INVALID_PARAMETER means truncation is not supported on this file handle. + // Unix's O_TRUNC specification says to ignore O_TRUNC on named pipes and terminal devices. + // We do the same here. + if t, err1 := GetFileType(h); err1 == nil && (t == FILE_TYPE_PIPE || t == FILE_TYPE_CHAR) { + err = nil + } + } if err != nil { CloseHandle(h) return InvalidHandle, err diff --git a/src/syscall/types_windows.go b/src/syscall/types_windows.go index b40b455e7d..3c6d18a850 100644 --- a/src/syscall/types_windows.go +++ b/src/syscall/types_windows.go @@ -35,6 +35,10 @@ const ( ) const ( + _ERROR_INVALID_PARAMETER Errno = 87 +) + +const ( // Invented values to support what package os expects. O_RDONLY = 0x00000 O_WRONLY = 0x00001 |