diff options
Diffstat (limited to 'vendor/golang.org/x/sys/unix/syscall_linux.go')
| -rw-r--r-- | vendor/golang.org/x/sys/unix/syscall_linux.go | 157 |
1 files changed, 154 insertions, 3 deletions
diff --git a/vendor/golang.org/x/sys/unix/syscall_linux.go b/vendor/golang.org/x/sys/unix/syscall_linux.go index 26903bca8..95f7a159a 100644 --- a/vendor/golang.org/x/sys/unix/syscall_linux.go +++ b/vendor/golang.org/x/sys/unix/syscall_linux.go @@ -1555,8 +1555,8 @@ func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err e //sys Acct(path string) (err error) //sys AddKey(keyType string, description string, payload []byte, ringid int) (id int, err error) //sys Adjtimex(buf *Timex) (state int, err error) -//sys Capget(hdr *CapUserHeader, data *CapUserData) (err error) -//sys Capset(hdr *CapUserHeader, data *CapUserData) (err error) +//sysnb Capget(hdr *CapUserHeader, data *CapUserData) (err error) +//sysnb Capset(hdr *CapUserHeader, data *CapUserData) (err error) //sys Chdir(path string) (err error) //sys Chroot(path string) (err error) //sys ClockGetres(clockid int32, res *Timespec) (err error) @@ -1575,7 +1575,6 @@ func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err e //sys Fchdir(fd int) (err error) //sys Fchmod(fd int, mode uint32) (err error) //sys Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error) -//sys fcntl(fd int, cmd int, arg int) (val int, err error) //sys Fdatasync(fd int) (err error) //sys Fgetxattr(fd int, attr string, dest []byte) (sz int, err error) //sys FinitModule(fd int, params string, flags int) (err error) @@ -1631,6 +1630,17 @@ func Getpgrp() (pid int) { //sysnb Settimeofday(tv *Timeval) (err error) //sys Setns(fd int, nstype int) (err error) +// PrctlRetInt performs a prctl operation specified by option and further +// optional arguments arg2 through arg5 depending on option. It returns a +// non-negative integer that is returned by the prctl syscall. +func PrctlRetInt(option int, arg2 uintptr, arg3 uintptr, arg4 uintptr, arg5 uintptr) (int, error) { + ret, _, err := Syscall6(SYS_PRCTL, uintptr(option), uintptr(arg2), uintptr(arg3), uintptr(arg4), uintptr(arg5), 0) + if err != 0 { + return 0, err + } + return int(ret), nil +} + // issue 1435. // On linux Setuid and Setgid only affects the current thread, not the process. // This does not match what most callers expect so we must return an error @@ -1644,6 +1654,30 @@ func Setgid(uid int) (err error) { return EOPNOTSUPP } +// SetfsgidRetGid sets fsgid for current thread and returns previous fsgid set. +// setfsgid(2) will return a non-nil error only if its caller lacks CAP_SETUID capability. +// If the call fails due to other reasons, current fsgid will be returned. +func SetfsgidRetGid(gid int) (int, error) { + return setfsgid(gid) +} + +// SetfsuidRetUid sets fsuid for current thread and returns previous fsuid set. +// setfsgid(2) will return a non-nil error only if its caller lacks CAP_SETUID capability +// If the call fails due to other reasons, current fsuid will be returned. +func SetfsuidRetUid(uid int) (int, error) { + return setfsuid(uid) +} + +func Setfsgid(gid int) error { + _, err := setfsgid(gid) + return err +} + +func Setfsuid(uid int) error { + _, err := setfsuid(uid) + return err +} + func Signalfd(fd int, sigmask *Sigset_t, flags int) (newfd int, err error) { return signalfd(fd, sigmask, _C__NSIG/8, flags) } @@ -1666,6 +1700,123 @@ func Signalfd(fd int, sigmask *Sigset_t, flags int) (newfd int, err error) { //sys exitThread(code int) (err error) = SYS_EXIT //sys readlen(fd int, p *byte, np int) (n int, err error) = SYS_READ //sys writelen(fd int, p *byte, np int) (n int, err error) = SYS_WRITE +//sys readv(fd int, iovs []Iovec) (n int, err error) = SYS_READV +//sys writev(fd int, iovs []Iovec) (n int, err error) = SYS_WRITEV +//sys preadv(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr) (n int, err error) = SYS_PREADV +//sys pwritev(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr) (n int, err error) = SYS_PWRITEV +//sys preadv2(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr, flags int) (n int, err error) = SYS_PREADV2 +//sys pwritev2(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr, flags int) (n int, err error) = SYS_PWRITEV2 + +func bytes2iovec(bs [][]byte) []Iovec { + iovecs := make([]Iovec, len(bs)) + for i, b := range bs { + iovecs[i].SetLen(len(b)) + if len(b) > 0 { + iovecs[i].Base = &b[0] + } else { + iovecs[i].Base = (*byte)(unsafe.Pointer(&_zero)) + } + } + return iovecs +} + +// offs2lohi splits offs into its lower and upper unsigned long. On 64-bit +// systems, hi will always be 0. On 32-bit systems, offs will be split in half. +// preadv/pwritev chose this calling convention so they don't need to add a +// padding-register for alignment on ARM. +func offs2lohi(offs int64) (lo, hi uintptr) { + return uintptr(offs), uintptr(uint64(offs) >> SizeofLong) +} + +func Readv(fd int, iovs [][]byte) (n int, err error) { + iovecs := bytes2iovec(iovs) + n, err = readv(fd, iovecs) + readvRacedetect(iovecs, n, err) + return n, err +} + +func Preadv(fd int, iovs [][]byte, offset int64) (n int, err error) { + iovecs := bytes2iovec(iovs) + lo, hi := offs2lohi(offset) + n, err = preadv(fd, iovecs, lo, hi) + readvRacedetect(iovecs, n, err) + return n, err +} + +func Preadv2(fd int, iovs [][]byte, offset int64, flags int) (n int, err error) { + iovecs := bytes2iovec(iovs) + lo, hi := offs2lohi(offset) + n, err = preadv2(fd, iovecs, lo, hi, flags) + readvRacedetect(iovecs, n, err) + return n, err +} + +func readvRacedetect(iovecs []Iovec, n int, err error) { + if !raceenabled { + return + } + for i := 0; n > 0 && i < len(iovecs); i++ { + m := int(iovecs[i].Len) + if m > n { + m = n + } + n -= m + if m > 0 { + raceWriteRange(unsafe.Pointer(iovecs[i].Base), m) + } + } + if err == nil { + raceAcquire(unsafe.Pointer(&ioSync)) + } +} + +func Writev(fd int, iovs [][]byte) (n int, err error) { + iovecs := bytes2iovec(iovs) + if raceenabled { + raceReleaseMerge(unsafe.Pointer(&ioSync)) + } + n, err = writev(fd, iovecs) + writevRacedetect(iovecs, n) + return n, err +} + +func Pwritev(fd int, iovs [][]byte, offset int64) (n int, err error) { + iovecs := bytes2iovec(iovs) + if raceenabled { + raceReleaseMerge(unsafe.Pointer(&ioSync)) + } + lo, hi := offs2lohi(offset) + n, err = pwritev(fd, iovecs, lo, hi) + writevRacedetect(iovecs, n) + return n, err +} + +func Pwritev2(fd int, iovs [][]byte, offset int64, flags int) (n int, err error) { + iovecs := bytes2iovec(iovs) + if raceenabled { + raceReleaseMerge(unsafe.Pointer(&ioSync)) + } + lo, hi := offs2lohi(offset) + n, err = pwritev2(fd, iovecs, lo, hi, flags) + writevRacedetect(iovecs, n) + return n, err +} + +func writevRacedetect(iovecs []Iovec, n int) { + if !raceenabled { + return + } + for i := 0; n > 0 && i < len(iovecs); i++ { + m := int(iovecs[i].Len) + if m > n { + m = n + } + n -= m + if m > 0 { + raceReadRange(unsafe.Pointer(iovecs[i].Base), m) + } + } +} // mmap varies by architecture; see syscall_linux_*.go. //sys munmap(addr uintptr, length uintptr) (err error) |