diff options
author | Russ Cox <rsc@golang.org> | 2014-09-08 00:08:51 -0400 |
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committer | Russ Cox <rsc@golang.org> | 2014-09-08 00:08:51 -0400 |
commit | 8528da672cc093d4dd06732819abc1f7b6b5a46e (patch) | |
tree | 334be80d4a4c85b77db6f6fdb67cbf0528cba5f5 /src/runtime/env_plan9.go | |
parent | 73bcb69f272cbf34ddcc9daa56427a8683b5a95d (diff) | |
download | go-8528da672cc093d4dd06732819abc1f7b6b5a46e.tar.gz |
build: move package sources from src/pkg to src
Preparation was in CL 134570043.
This CL contains only the effect of 'hg mv src/pkg/* src'.
For more about the move, see golang.org/s/go14nopkg.
Diffstat (limited to 'src/runtime/env_plan9.go')
-rw-r--r-- | src/runtime/env_plan9.go | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/src/runtime/env_plan9.go b/src/runtime/env_plan9.go new file mode 100644 index 000000000..76e9867e0 --- /dev/null +++ b/src/runtime/env_plan9.go @@ -0,0 +1,52 @@ +// Copyright 2012 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 runtime + +import "unsafe" + +func getenv(s *byte) *byte { + val := gogetenv(gostringnocopy(s)) + if val == "" { + return nil + } + // Strings found in environment are NUL-terminated. + return &bytes(val)[0] +} + +var tracebackbuf [128]byte + +func gogetenv(key string) string { + var file [128]byte + if len(key) > len(file)-6 { + return "" + } + + copy(file[:], "/env/") + copy(file[5:], key) + + fd := open(&file[0], _OREAD, 0) + if fd < 0 { + return "" + } + n := seek(fd, 0, 2) - 1 + if n <= 0 { + close(fd) + return "" + } + + p := make([]byte, n) + + r := pread(fd, unsafe.Pointer(&p[0]), int32(n), 0) + close(fd) + if r < 0 { + return "" + } + + var s string + sp := (*_string)(unsafe.Pointer(&s)) + sp.str = &p[0] + sp.len = int(r) + return s +} |