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os: fix Plan 9 build after more FileMode changes

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This should go in after Brad's CL 5553064.

R=bradfitz, rsc
CC=golang-dev
https://golang.org/cl/5555056
This commit is contained in:
Anthony Martin 2012-01-20 20:01:29 -08:00
parent 35ba05ee28
commit fb3b27329e
1 changed files with 28 additions and 15 deletions
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43
src/pkg/os/file_plan9.go
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@ -56,12 +56,27 @@ func epipecheck(file *File, e error) {
// On Unix-like systems, it is "/dev/null"; on Windows, "NUL". // On Unix-like systems, it is "/dev/null"; on Windows, "NUL".
const DevNull = "/dev/null" const DevNull = "/dev/null"
// syscallMode returns the syscall-specific mode bits from Go's portable mode bits.
func syscallMode(i FileMode) (o uint32) {
o |= uint32(i.Perm())
if i&ModeAppend != 0 {
o |= syscall.DMAPPEND
}
if i&ModeExclusive != 0 {
o |= syscall.DMEXCL
}
if i&ModeTemporary != 0 {
o |= syscall.DMTMP
}
return
}
// OpenFile is the generalized open call; most users will use Open // OpenFile is the generalized open call; most users will use Open
// or Create instead. It opens the named file with specified flag // or Create instead. It opens the named file with specified flag
// (O_RDONLY etc.) and perm, (0666 etc.) if applicable. If successful, // (O_RDONLY etc.) and perm, (0666 etc.) if applicable. If successful,
// methods on the returned File can be used for I/O. // methods on the returned File can be used for I/O.
// It returns the File and an error, if any. // It returns the File and an error, if any.
func OpenFile(name string, flag int, perm uint32) (file *File, err error) { func OpenFile(name string, flag int, perm FileMode) (file *File, err error) {
var ( var (
fd int fd int
e error e error
@ -89,12 +104,12 @@ func OpenFile(name string, flag int, perm uint32) (file *File, err error) {
syscall.ForkLock.RLock() syscall.ForkLock.RLock()
if (create && trunc) || excl { if (create && trunc) || excl {
fd, e = syscall.Create(name, flag, perm) fd, e = syscall.Create(name, flag, syscallMode(perm))
} else { } else {
fd, e = syscall.Open(name, flag) fd, e = syscall.Open(name, flag)
if e != nil && create { if e != nil && create {
var e1 error var e1 error
fd, e1 = syscall.Create(name, flag, perm) fd, e1 = syscall.Create(name, flag, syscallMode(perm))
if e1 == nil { if e1 == nil {
e = nil e = nil
} }
@ -162,18 +177,18 @@ func (f *File) Truncate(size int64) error {
return nil return nil
} }
// Chmod changes the mode of the file to mode. const chmodMask = uint32(syscall.DMAPPEND | syscall.DMEXCL | syscall.DMTMP | ModePerm)
func (f *File) Chmod(mode uint32) error {
var d Dir // Chmod changes the mode of the file to mode.
var mask = ^uint32(0777) func (f *File) Chmod(mode FileMode) error {
var d Dir
d.Null()
odir, e := dirstat(f) odir, e := dirstat(f)
if e != nil { if e != nil {
return &PathError{"chmod", f.name, e} return &PathError{"chmod", f.name, e}
} }
d.Null()
d.Mode = (odir.Mode & mask) | (mode &^ mask) d.Mode = odir.Mode&^chmodMask | syscallMode(mode)&chmodMask
if e := syscall.Fwstat(f.fd, pdir(nil, &d)); e != nil { if e := syscall.Fwstat(f.fd, pdir(nil, &d)); e != nil {
return &PathError{"chmod", f.name, e} return &PathError{"chmod", f.name, e}
} }
@ -266,17 +281,15 @@ func Rename(oldname, newname string) error {
} }
// Chmod changes the mode of the named file to mode. // Chmod changes the mode of the named file to mode.
func Chmod(name string, mode uint32) error { func Chmod(name string, mode FileMode) error {
var d Dir var d Dir
var mask = ^uint32(0777)
d.Null()
odir, e := dirstat(name) odir, e := dirstat(name)
if e != nil { if e != nil {
return &PathError{"chmod", name, e} return &PathError{"chmod", name, e}
} }
d.Null()
d.Mode = (odir.Mode & mask) | (mode &^ mask) d.Mode = odir.Mode&^chmodMask | syscallMode(mode)&chmodMask
if e := syscall.Wstat(name, pdir(nil, &d)); e != nil { if e := syscall.Wstat(name, pdir(nil, &d)); e != nil {
return &PathError{"chmod", name, e} return &PathError{"chmod", name, e}
} }