diff options
Diffstat (limited to 'vendor/golang.org/x/sys/unix/syscall_freebsd.go')
| -rw-r--r-- | vendor/golang.org/x/sys/unix/syscall_freebsd.go | 598 |
1 files changed, 328 insertions, 270 deletions
diff --git a/vendor/golang.org/x/sys/unix/syscall_freebsd.go b/vendor/golang.org/x/sys/unix/syscall_freebsd.go index f9b82811..085a808c 100644 --- a/vendor/golang.org/x/sys/unix/syscall_freebsd.go +++ b/vendor/golang.org/x/sys/unix/syscall_freebsd.go @@ -12,8 +12,36 @@ package unix -import "unsafe" - +import ( + "sync" + "unsafe" +) + +const ( + SYS_FSTAT_FREEBSD12 = 551 // { int fstat(int fd, _Out_ struct stat *sb); } + SYS_FSTATAT_FREEBSD12 = 552 // { int fstatat(int fd, _In_z_ char *path, \ + SYS_GETDIRENTRIES_FREEBSD12 = 554 // { ssize_t getdirentries(int fd, \ + SYS_STATFS_FREEBSD12 = 555 // { int statfs(_In_z_ char *path, \ + SYS_FSTATFS_FREEBSD12 = 556 // { int fstatfs(int fd, \ + SYS_GETFSSTAT_FREEBSD12 = 557 // { int getfsstat( \ + SYS_MKNODAT_FREEBSD12 = 559 // { int mknodat(int fd, _In_z_ char *path, \ +) + +// See https://www.freebsd.org/doc/en_US.ISO8859-1/books/porters-handbook/versions.html. +var ( + osreldateOnce sync.Once + osreldate uint32 +) + +// INO64_FIRST from /usr/src/lib/libc/sys/compat-ino64.h +const _ino64First = 1200031 + +func supportsABI(ver uint32) bool { + osreldateOnce.Do(func() { osreldate, _ = SysctlUint32("kern.osreldate") }) + return osreldate >= ver +} + +// SockaddrDatalink implements the Sockaddr interface for AF_LINK type sockets. type SockaddrDatalink struct { Len uint8 Family uint8 @@ -54,26 +82,21 @@ func nametomib(name string) (mib []_C_int, err error) { return buf[0 : n/siz], nil } -func direntIno(buf []byte) (uint64, bool) { - return readInt(buf, unsafe.Offsetof(Dirent{}.Fileno), unsafe.Sizeof(Dirent{}.Fileno)) -} - -func direntReclen(buf []byte) (uint64, bool) { - return readInt(buf, unsafe.Offsetof(Dirent{}.Reclen), unsafe.Sizeof(Dirent{}.Reclen)) -} - -func direntNamlen(buf []byte) (uint64, bool) { - return readInt(buf, unsafe.Offsetof(Dirent{}.Namlen), unsafe.Sizeof(Dirent{}.Namlen)) +func Pipe(p []int) (err error) { + return Pipe2(p, 0) } -//sysnb pipe() (r int, w int, err error) +//sysnb pipe2(p *[2]_C_int, flags int) (err error) -func Pipe(p []int) (err error) { +func Pipe2(p []int, flags int) error { if len(p) != 2 { return EINVAL } - p[0], p[1], err = pipe() - return + var pp [2]_C_int + err := pipe2(&pp, flags) + p[0] = int(pp[0]) + p[1] = int(pp[1]) + return err } func GetsockoptIPMreqn(fd, level, opt int) (*IPMreqn, error) { @@ -97,7 +120,7 @@ func Accept4(fd, flags int) (nfd int, sa Sockaddr, err error) { if len > SizeofSockaddrAny { panic("RawSockaddrAny too small") } - sa, err = anyToSockaddr(&rsa) + sa, err = anyToSockaddr(fd, &rsa) if err != nil { Close(nfd) nfd = 0 @@ -105,256 +128,63 @@ func Accept4(fd, flags int) (nfd int, sa Sockaddr, err error) { return } -func Getfsstat(buf []Statfs_t, flags int) (n int, err error) { - var _p0 unsafe.Pointer - var bufsize uintptr - if len(buf) > 0 { - _p0 = unsafe.Pointer(&buf[0]) - bufsize = unsafe.Sizeof(Statfs_t{}) * uintptr(len(buf)) - } - r0, _, e1 := Syscall(SYS_GETFSSTAT, uintptr(_p0), bufsize, uintptr(flags)) - n = int(r0) - if e1 != 0 { - err = e1 - } - return -} - -func setattrlistTimes(path string, times []Timespec, flags int) error { - // used on Darwin for UtimesNano - return ENOSYS -} - -// Derive extattr namespace and attribute name - -func xattrnamespace(fullattr string) (ns int, attr string, err error) { - s := -1 - for idx, val := range fullattr { - if val == '.' { - s = idx - break - } - } - - if s == -1 { - return -1, "", ENOATTR - } - - namespace := fullattr[0:s] - attr = fullattr[s+1:] - - switch namespace { - case "user": - return EXTATTR_NAMESPACE_USER, attr, nil - case "system": - return EXTATTR_NAMESPACE_SYSTEM, attr, nil - default: - return -1, "", ENOATTR - } -} - -func initxattrdest(dest []byte, idx int) (d unsafe.Pointer) { - if len(dest) > idx { - return unsafe.Pointer(&dest[idx]) - } else { - return unsafe.Pointer(_zero) - } -} - -// FreeBSD implements its own syscalls to handle extended attributes +const ImplementsGetwd = true -func Getxattr(file string, attr string, dest []byte) (sz int, err error) { - d := initxattrdest(dest, 0) - destsize := len(dest) +//sys Getcwd(buf []byte) (n int, err error) = SYS___GETCWD - nsid, a, err := xattrnamespace(attr) +func Getwd() (string, error) { + var buf [PathMax]byte + _, err := Getcwd(buf[0:]) if err != nil { - return -1, err + return "", err } - - return ExtattrGetFile(file, nsid, a, uintptr(d), destsize) -} - -func Fgetxattr(fd int, attr string, dest []byte) (sz int, err error) { - d := initxattrdest(dest, 0) - destsize := len(dest) - - nsid, a, err := xattrnamespace(attr) - if err != nil { - return -1, err - } - - return ExtattrGetFd(fd, nsid, a, uintptr(d), destsize) -} - -func Lgetxattr(link string, attr string, dest []byte) (sz int, err error) { - d := initxattrdest(dest, 0) - destsize := len(dest) - - nsid, a, err := xattrnamespace(attr) - if err != nil { - return -1, err + n := clen(buf[:]) + if n < 1 { + return "", EINVAL } - - return ExtattrGetLink(link, nsid, a, uintptr(d), destsize) + return string(buf[:n]), nil } -// flags are unused on FreeBSD - -func Fsetxattr(fd int, attr string, data []byte, flags int) (err error) { - d := unsafe.Pointer(&data[0]) - datasiz := len(data) - - nsid, a, err := xattrnamespace(attr) - if err != nil { - return - } - - _, err = ExtattrSetFd(fd, nsid, a, uintptr(d), datasiz) - return -} - -func Setxattr(file string, attr string, data []byte, flags int) (err error) { - d := unsafe.Pointer(&data[0]) - datasiz := len(data) - - nsid, a, err := xattrnamespace(attr) - if err != nil { - return - } - - _, err = ExtattrSetFile(file, nsid, a, uintptr(d), datasiz) - return -} - -func Lsetxattr(link string, attr string, data []byte, flags int) (err error) { - d := unsafe.Pointer(&data[0]) - datasiz := len(data) - - nsid, a, err := xattrnamespace(attr) - if err != nil { - return - } - - _, err = ExtattrSetLink(link, nsid, a, uintptr(d), datasiz) - return -} - -func Removexattr(file string, attr string) (err error) { - nsid, a, err := xattrnamespace(attr) - if err != nil { - return - } - - err = ExtattrDeleteFile(file, nsid, a) - return -} +func Getfsstat(buf []Statfs_t, flags int) (n int, err error) { + var ( + _p0 unsafe.Pointer + bufsize uintptr + oldBuf []statfs_freebsd11_t + needsConvert bool + ) -func Fremovexattr(fd int, attr string) (err error) { - nsid, a, err := xattrnamespace(attr) - if err != nil { - return + if len(buf) > 0 { + if supportsABI(_ino64First) { + _p0 = unsafe.Pointer(&buf[0]) + bufsize = unsafe.Sizeof(Statfs_t{}) * uintptr(len(buf)) + } else { + n := len(buf) + oldBuf = make([]statfs_freebsd11_t, n) + _p0 = unsafe.Pointer(&oldBuf[0]) + bufsize = unsafe.Sizeof(statfs_freebsd11_t{}) * uintptr(n) + needsConvert = true + } } - - err = ExtattrDeleteFd(fd, nsid, a) - return -} - -func Lremovexattr(link string, attr string) (err error) { - nsid, a, err := xattrnamespace(attr) - if err != nil { - return + var sysno uintptr = SYS_GETFSSTAT + if supportsABI(_ino64First) { + sysno = SYS_GETFSSTAT_FREEBSD12 } - - err = ExtattrDeleteLink(link, nsid, a) - return -} - -func Listxattr(file string, dest []byte) (sz int, err error) { - d := initxattrdest(dest, 0) - destsiz := len(dest) - - // FreeBSD won't allow you to list xattrs from multiple namespaces - s := 0 - var e error - for _, nsid := range [...]int{EXTATTR_NAMESPACE_USER, EXTATTR_NAMESPACE_SYSTEM} { - stmp, e := ExtattrListFile(file, nsid, uintptr(d), destsiz) - - /* Errors accessing system attrs are ignored so that - * we can implement the Linux-like behavior of omitting errors that - * we don't have read permissions on - * - * Linux will still error if we ask for user attributes on a file that - * we don't have read permissions on, so don't ignore those errors - */ - if e != nil && e == EPERM && nsid != EXTATTR_NAMESPACE_USER { - e = nil - continue - } else if e != nil { - return s, e - } - - s += stmp - destsiz -= s - if destsiz < 0 { - destsiz = 0 - } - d = initxattrdest(dest, s) + r0, _, e1 := Syscall(sysno, uintptr(_p0), bufsize, uintptr(flags)) + n = int(r0) + if e1 != 0 { + err = e1 } - - return s, e -} - -func Flistxattr(fd int, dest []byte) (sz int, err error) { - d := initxattrdest(dest, 0) - destsiz := len(dest) - - s := 0 - var e error - for _, nsid := range [...]int{EXTATTR_NAMESPACE_USER, EXTATTR_NAMESPACE_SYSTEM} { - stmp, e := ExtattrListFd(fd, nsid, uintptr(d), destsiz) - if e != nil && e == EPERM && nsid != EXTATTR_NAMESPACE_USER { - e = nil - continue - } else if e != nil { - return s, e + if e1 == 0 && needsConvert { + for i := range oldBuf { + buf[i].convertFrom(&oldBuf[i]) } - - s += stmp - destsiz -= s - if destsiz < 0 { - destsiz = 0 - } - d = initxattrdest(dest, s) } - - return s, e + return } -func Llistxattr(link string, dest []byte) (sz int, err error) { - d := initxattrdest(dest, 0) - destsiz := len(dest) - - s := 0 - var e error - for _, nsid := range [...]int{EXTATTR_NAMESPACE_USER, EXTATTR_NAMESPACE_SYSTEM} { - stmp, e := ExtattrListLink(link, nsid, uintptr(d), destsiz) - if e != nil && e == EPERM && nsid != EXTATTR_NAMESPACE_USER { - e = nil - continue - } else if e != nil { - return s, e - } - - s += stmp - destsiz -= s - if destsiz < 0 { - destsiz = 0 - } - d = initxattrdest(dest, s) - } - - return s, e +func setattrlistTimes(path string, times []Timespec, flags int) error { + // used on Darwin for UtimesNano + return ENOSYS } //sys ioctl(fd int, req uint, arg uintptr) (err error) @@ -368,11 +198,11 @@ func IoctlSetInt(fd int, req uint, value int) error { return ioctl(fd, req, uintptr(value)) } -func IoctlSetWinsize(fd int, req uint, value *Winsize) error { +func ioctlSetWinsize(fd int, req uint, value *Winsize) error { return ioctl(fd, req, uintptr(unsafe.Pointer(value))) } -func IoctlSetTermios(fd int, req uint, value *Termios) error { +func ioctlSetTermios(fd int, req uint, value *Termios) error { return ioctl(fd, req, uintptr(unsafe.Pointer(value))) } @@ -442,6 +272,234 @@ func Uname(uname *Utsname) error { return nil } +func Stat(path string, st *Stat_t) (err error) { + var oldStat stat_freebsd11_t + if supportsABI(_ino64First) { + return fstatat_freebsd12(AT_FDCWD, path, st, 0) + } + err = stat(path, &oldStat) + if err != nil { + return err + } + + st.convertFrom(&oldStat) + return nil +} + +func Lstat(path string, st *Stat_t) (err error) { + var oldStat stat_freebsd11_t + if supportsABI(_ino64First) { + return fstatat_freebsd12(AT_FDCWD, path, st, AT_SYMLINK_NOFOLLOW) + } + err = lstat(path, &oldStat) + if err != nil { + return err + } + + st.convertFrom(&oldStat) + return nil +} + +func Fstat(fd int, st *Stat_t) (err error) { + var oldStat stat_freebsd11_t + if supportsABI(_ino64First) { + return fstat_freebsd12(fd, st) + } + err = fstat(fd, &oldStat) + if err != nil { + return err + } + + st.convertFrom(&oldStat) + return nil +} + +func Fstatat(fd int, path string, st *Stat_t, flags int) (err error) { + var oldStat stat_freebsd11_t + if supportsABI(_ino64First) { + return fstatat_freebsd12(fd, path, st, flags) + } + err = fstatat(fd, path, &oldStat, flags) + if err != nil { + return err + } + + st.convertFrom(&oldStat) + return nil +} + +func Statfs(path string, st *Statfs_t) (err error) { + var oldStatfs statfs_freebsd11_t + if supportsABI(_ino64First) { + return statfs_freebsd12(path, st) + } + err = statfs(path, &oldStatfs) + if err != nil { + return err + } + + st.convertFrom(&oldStatfs) + return nil +} + +func Fstatfs(fd int, st *Statfs_t) (err error) { + var oldStatfs statfs_freebsd11_t + if supportsABI(_ino64First) { + return fstatfs_freebsd12(fd, st) + } + err = fstatfs(fd, &oldStatfs) + if err != nil { + return err + } + + st.convertFrom(&oldStatfs) + return nil +} + +func Getdents(fd int, buf []byte) (n int, err error) { + return Getdirentries(fd, buf, nil) +} + +func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) { + if supportsABI(_ino64First) { + return getdirentries_freebsd12(fd, buf, basep) + } + + // The old syscall entries are smaller than the new. Use 1/4 of the original + // buffer size rounded up to DIRBLKSIZ (see /usr/src/lib/libc/sys/getdirentries.c). + oldBufLen := roundup(len(buf)/4, _dirblksiz) + oldBuf := make([]byte, oldBufLen) + n, err = getdirentries(fd, oldBuf, basep) + if err == nil && n > 0 { + n = convertFromDirents11(buf, oldBuf[:n]) + } + return +} + +func Mknod(path string, mode uint32, dev uint64) (err error) { + var oldDev int + if supportsABI(_ino64First) { + return mknodat_freebsd12(AT_FDCWD, path, mode, dev) + } + oldDev = int(dev) + return mknod(path, mode, oldDev) +} + +func Mknodat(fd int, path string, mode uint32, dev uint64) (err error) { + var oldDev int + if supportsABI(_ino64First) { + return mknodat_freebsd12(fd, path, mode, dev) + } + oldDev = int(dev) + return mknodat(fd, path, mode, oldDev) +} + +// round x to the nearest multiple of y, larger or equal to x. +// +// from /usr/include/sys/param.h Macros for counting and rounding. +// #define roundup(x, y) ((((x)+((y)-1))/(y))*(y)) +func roundup(x, y int) int { + return ((x + y - 1) / y) * y +} + +func (s *Stat_t) convertFrom(old *stat_freebsd11_t) { + *s = Stat_t{ + Dev: uint64(old.Dev), + Ino: uint64(old.Ino), + Nlink: uint64(old.Nlink), + Mode: old.Mode, + Uid: old.Uid, + Gid: old.Gid, + Rdev: uint64(old.Rdev), + Atim: old.Atim, + Mtim: old.Mtim, + Ctim: old.Ctim, + Birthtim: old.Birthtim, + Size: old.Size, + Blocks: old.Blocks, + Blksize: old.Blksize, + Flags: old.Flags, + Gen: uint64(old.Gen), + } +} + +func (s *Statfs_t) convertFrom(old *statfs_freebsd11_t) { + *s = Statfs_t{ + Version: _statfsVersion, + Type: old.Type, + Flags: old.Flags, + Bsize: old.Bsize, + Iosize: old.Iosize, + Blocks: old.Blocks, + Bfree: old.Bfree, + Bavail: old.Bavail, + Files: old.Files, + Ffree: old.Ffree, + Syncwrites: old.Syncwrites, + Asyncwrites: old.Asyncwrites, + Syncreads: old.Syncreads, + Asyncreads: old.Asyncreads, + // Spare + Namemax: old.Namemax, + Owner: old.Owner, + Fsid: old.Fsid, + // Charspare + // Fstypename + // Mntfromname + // Mntonname + } + + sl := old.Fstypename[:] + n := clen(*(*[]byte)(unsafe.Pointer(&sl))) + copy(s.Fstypename[:], old.Fstypename[:n]) + + sl = old.Mntfromname[:] + n = clen(*(*[]byte)(unsafe.Pointer(&sl))) + copy(s.Mntfromname[:], old.Mntfromname[:n]) + + sl = old.Mntonname[:] + n = clen(*(*[]byte)(unsafe.Pointer(&sl))) + copy(s.Mntonname[:], old.Mntonname[:n]) +} + +func convertFromDirents11(buf []byte, old []byte) int { + const ( + fixedSize = int(unsafe.Offsetof(Dirent{}.Name)) + oldFixedSize = int(unsafe.Offsetof(dirent_freebsd11{}.Name)) + ) + + dstPos := 0 + srcPos := 0 + for dstPos+fixedSize < len(buf) && srcPos+oldFixedSize < len(old) { + dstDirent := (*Dirent)(unsafe.Pointer(&buf[dstPos])) + srcDirent := (*dirent_freebsd11)(unsafe.Pointer(&old[srcPos])) + + reclen := roundup(fixedSize+int(srcDirent.Namlen)+1, 8) + if dstPos+reclen > len(buf) { + break + } + + dstDirent.Fileno = uint64(srcDirent.Fileno) + dstDirent.Off = 0 + dstDirent.Reclen = uint16(reclen) + dstDirent.Type = srcDirent.Type + dstDirent.Pad0 = 0 + dstDirent.Namlen = uint16(srcDirent.Namlen) + dstDirent.Pad1 = 0 + + copy(dstDirent.Name[:], srcDirent.Name[:srcDirent.Namlen]) + padding := buf[dstPos+fixedSize+int(dstDirent.Namlen) : dstPos+reclen] + for i := range padding { + padding[i] = 0 + } + + dstPos += int(dstDirent.Reclen) + srcPos += int(srcDirent.Reclen) + } + + return dstPos +} + /* * Exposed directly */ @@ -481,12 +539,16 @@ func Uname(uname *Utsname) error { //sys Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error) //sys Flock(fd int, how int) (err error) //sys Fpathconf(fd int, name int) (val int, err error) -//sys Fstat(fd int, stat *Stat_t) (err error) -//sys Fstatfs(fd int, stat *Statfs_t) (err error) +//sys fstat(fd int, stat *stat_freebsd11_t) (err error) +//sys fstat_freebsd12(fd int, stat *Stat_t) (err error) +//sys fstatat(fd int, path string, stat *stat_freebsd11_t, flags int) (err error) +//sys fstatat_freebsd12(fd int, path string, stat *Stat_t, flags int) (err error) +//sys fstatfs(fd int, stat *statfs_freebsd11_t) (err error) +//sys fstatfs_freebsd12(fd int, stat *Statfs_t) (err error) //sys Fsync(fd int) (err error) //sys Ftruncate(fd int, length int64) (err error) -//sys Getdents(fd int, buf []byte) (n int, err error) -//sys Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) +//sys getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) +//sys getdirentries_freebsd12(fd int, buf []byte, basep *uintptr) (n int, err error) //sys Getdtablesize() (size int) //sysnb Getegid() (egid int) //sysnb Geteuid() (uid int) @@ -508,11 +570,13 @@ func Uname(uname *Utsname) error { //sys Link(path string, link string) (err error) //sys Linkat(pathfd int, path string, linkfd int, link string, flags int) (err error) //sys Listen(s int, backlog int) (err error) -//sys Lstat(path string, stat *Stat_t) (err error) +//sys lstat(path string, stat *stat_freebsd11_t) (err error) //sys Mkdir(path string, mode uint32) (err error) //sys Mkdirat(dirfd int, path string, mode uint32) (err error) //sys Mkfifo(path string, mode uint32) (err error) -//sys Mknod(path string, mode uint32, dev int) (err error) +//sys mknod(path string, mode uint32, dev int) (err error) +//sys mknodat(fd int, path string, mode uint32, dev int) (err error) +//sys mknodat_freebsd12(fd int, path string, mode uint32, dev uint64) (err error) //sys Nanosleep(time *Timespec, leftover *Timespec) (err error) //sys Open(path string, mode int, perm uint32) (fd int, err error) //sys Openat(fdat int, path string, mode int, perm uint32) (fd int, err error) @@ -542,8 +606,9 @@ func Uname(uname *Utsname) error { //sysnb Setsid() (pid int, err error) //sysnb Settimeofday(tp *Timeval) (err error) //sysnb Setuid(uid int) (err error) -//sys Stat(path string, stat *Stat_t) (err error) -//sys Statfs(path string, stat *Statfs_t) (err error) +//sys stat(path string, stat *stat_freebsd11_t) (err error) +//sys statfs(path string, stat *statfs_freebsd11_t) (err error) +//sys statfs_freebsd12(path string, stat *Statfs_t) (err error) //sys Symlink(path string, link string) (err error) //sys Symlinkat(oldpath string, newdirfd int, newpath string) (err error) //sys Sync() (err error) @@ -598,6 +663,7 @@ func Uname(uname *Utsname) error { // Kqueue_portset // Getattrlist // Setattrlist +// Getdents // Getdirentriesattr // Searchfs // Delete @@ -605,14 +671,6 @@ func Uname(uname *Utsname) error { // Watchevent // Waitevent // Modwatch -// Getxattr -// Fgetxattr -// Setxattr -// Fsetxattr -// Removexattr -// Fremovexattr -// Listxattr -// Flistxattr // Fsctl // Initgroups // Posix_spawn |