1 files changed, 90 insertions, 0 deletions
diff --git a/src/pkg/os/error_posix.go b/src/pkg/os/error_posix.go
new file mode 100644
index 000000000..d43f1786d
--- /dev/null
+++ b/src/pkg/os/error_posix.go
@@ -0,0 +1,90 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package os
+
+import syscall "syscall"
+
+// Errno is the Unix error number.  Names such as EINVAL are simple
+// wrappers to convert the error number into an Error.
+type Errno int64
+
+func (e Errno) String() string { return syscall.Errstr(int(e)) }
+
+func (e Errno) Temporary() bool {
+	return e == Errno(syscall.EINTR) || e == Errno(syscall.EMFILE) || e.Timeout()
+}
+
+func (e Errno) Timeout() bool {
+	return e == Errno(syscall.EAGAIN) || e == Errno(syscall.EWOULDBLOCK) || e == Errno(syscall.ETIMEDOUT)
+}
+
+// Commonly known Unix errors.
+var (
+	EPERM        Error = Errno(syscall.EPERM)
+	ENOENT       Error = Errno(syscall.ENOENT)
+	ESRCH        Error = Errno(syscall.ESRCH)
+	EINTR        Error = Errno(syscall.EINTR)
+	EIO          Error = Errno(syscall.EIO)
+	ENXIO        Error = Errno(syscall.ENXIO)
+	E2BIG        Error = Errno(syscall.E2BIG)
+	ENOEXEC      Error = Errno(syscall.ENOEXEC)
+	EBADF        Error = Errno(syscall.EBADF)
+	ECHILD       Error = Errno(syscall.ECHILD)
+	EDEADLK      Error = Errno(syscall.EDEADLK)
+	ENOMEM       Error = Errno(syscall.ENOMEM)
+	EACCES       Error = Errno(syscall.EACCES)
+	EFAULT       Error = Errno(syscall.EFAULT)
+	EBUSY        Error = Errno(syscall.EBUSY)
+	EEXIST       Error = Errno(syscall.EEXIST)
+	EXDEV        Error = Errno(syscall.EXDEV)
+	ENODEV       Error = Errno(syscall.ENODEV)
+	ENOTDIR      Error = Errno(syscall.ENOTDIR)
+	EISDIR       Error = Errno(syscall.EISDIR)
+	EINVAL       Error = Errno(syscall.EINVAL)
+	ENFILE       Error = Errno(syscall.ENFILE)
+	EMFILE       Error = Errno(syscall.EMFILE)
+	ENOTTY       Error = Errno(syscall.ENOTTY)
+	EFBIG        Error = Errno(syscall.EFBIG)
+	ENOSPC       Error = Errno(syscall.ENOSPC)
+	ESPIPE       Error = Errno(syscall.ESPIPE)
+	EROFS        Error = Errno(syscall.EROFS)
+	EMLINK       Error = Errno(syscall.EMLINK)
+	EPIPE        Error = Errno(syscall.EPIPE)
+	EAGAIN       Error = Errno(syscall.EAGAIN)
+	EDOM         Error = Errno(syscall.EDOM)
+	ERANGE       Error = Errno(syscall.ERANGE)
+	EADDRINUSE   Error = Errno(syscall.EADDRINUSE)
+	ECONNREFUSED Error = Errno(syscall.ECONNREFUSED)
+	ENAMETOOLONG Error = Errno(syscall.ENAMETOOLONG)
+	EAFNOSUPPORT Error = Errno(syscall.EAFNOSUPPORT)
+	ETIMEDOUT    Error = Errno(syscall.ETIMEDOUT)
+	ENOTCONN     Error = Errno(syscall.ENOTCONN)
+)
+
+// SyscallError records an error from a specific system call.
+type SyscallError struct {
+	Syscall string
+	Errno   Errno
+}
+
+func (e *SyscallError) String() string { return e.Syscall + ": " + e.Errno.String() }
+
+// Note: If the name of the function NewSyscallError changes,
+// pkg/go/doc/doc.go should be adjusted since it hardwires
+// this name in a heuristic.
+
+// NewSyscallError returns, as an Error, a new SyscallError
+// with the given system call name and error details.
+// As a convenience, if errno is 0, NewSyscallError returns nil.
+func NewSyscallError(syscall string, errno int) Error {
+	if errno == 0 {
+		return nil
+	}
+	return &SyscallError{syscall, Errno(errno)}
+}
+
+func iserror(errno int) bool {
+	return errno != 0
+}