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 | 450 |
1 files changed, 284 insertions, 166 deletions
diff --git a/vendor/golang.org/x/sys/unix/syscall_linux.go b/vendor/golang.org/x/sys/unix/syscall_linux.go index c5a9844..3f1d3d4 100644 --- a/vendor/golang.org/x/sys/unix/syscall_linux.go +++ b/vendor/golang.org/x/sys/unix/syscall_linux.go @@ -61,15 +61,23 @@ func FanotifyMark(fd int, flags uint, mask uint64, dirFd int, pathname string) ( } //sys fchmodat(dirfd int, path string, mode uint32) (err error) - -func Fchmodat(dirfd int, path string, mode uint32, flags int) (err error) { - // Linux fchmodat doesn't support the flags parameter. Mimick glibc's behavior - // and check the flags. Otherwise the mode would be applied to the symlink - // destination which is not what the user expects. - if flags&^AT_SYMLINK_NOFOLLOW != 0 { - return EINVAL - } else if flags&AT_SYMLINK_NOFOLLOW != 0 { - return EOPNOTSUPP +//sys fchmodat2(dirfd int, path string, mode uint32, flags int) (err error) + +func Fchmodat(dirfd int, path string, mode uint32, flags int) error { + // Linux fchmodat doesn't support the flags parameter, but fchmodat2 does. + // Try fchmodat2 if flags are specified. + if flags != 0 { + err := fchmodat2(dirfd, path, mode, flags) + if err == ENOSYS { + // fchmodat2 isn't available. If the flags are known to be valid, + // return EOPNOTSUPP to indicate that fchmodat doesn't support them. + if flags&^(AT_SYMLINK_NOFOLLOW|AT_EMPTY_PATH) != 0 { + return EINVAL + } else if flags&(AT_SYMLINK_NOFOLLOW|AT_EMPTY_PATH) != 0 { + return EOPNOTSUPP + } + } + return err } return fchmodat(dirfd, path, mode) } @@ -417,7 +425,8 @@ func (sa *SockaddrUnix) sockaddr() (unsafe.Pointer, _Socklen, error) { if n > 0 { sl += _Socklen(n) + 1 } - if sa.raw.Path[0] == '@' { + if sa.raw.Path[0] == '@' || (sa.raw.Path[0] == 0 && sl > 3) { + // Check sl > 3 so we don't change unnamed socket behavior. sa.raw.Path[0] = 0 // Don't count trailing NUL for abstract address. sl-- @@ -693,10 +702,10 @@ type SockaddrALG struct { func (sa *SockaddrALG) sockaddr() (unsafe.Pointer, _Socklen, error) { // Leave room for NUL byte terminator. - if len(sa.Type) > 13 { + if len(sa.Type) > len(sa.raw.Type)-1 { return nil, 0, EINVAL } - if len(sa.Name) > 63 { + if len(sa.Name) > len(sa.raw.Name)-1 { return nil, 0, EINVAL } @@ -704,17 +713,8 @@ func (sa *SockaddrALG) sockaddr() (unsafe.Pointer, _Socklen, error) { sa.raw.Feat = sa.Feature sa.raw.Mask = sa.Mask - typ, err := ByteSliceFromString(sa.Type) - if err != nil { - return nil, 0, err - } - name, err := ByteSliceFromString(sa.Name) - if err != nil { - return nil, 0, err - } - - copy(sa.raw.Type[:], typ) - copy(sa.raw.Name[:], name) + copy(sa.raw.Type[:], sa.Type) + copy(sa.raw.Name[:], sa.Name) return unsafe.Pointer(&sa.raw), SizeofSockaddrALG, nil } @@ -1015,8 +1015,7 @@ func anyToSockaddr(fd int, rsa *RawSockaddrAny) (Sockaddr, error) { for n < len(pp.Path) && pp.Path[n] != 0 { n++ } - bytes := (*[len(pp.Path)]byte)(unsafe.Pointer(&pp.Path[0]))[0:n] - sa.Name = string(bytes) + sa.Name = string(unsafe.Slice((*byte)(unsafe.Pointer(&pp.Path[0])), n)) return sa, nil case AF_INET: @@ -1311,7 +1310,7 @@ func GetsockoptString(fd, level, opt int) (string, error) { return "", err } } - return string(buf[:vallen-1]), nil + return ByteSliceToString(buf[:vallen]), nil } func GetsockoptTpacketStats(fd, level, opt int) (*TpacketStats, error) { @@ -1365,6 +1364,10 @@ func SetsockoptTCPRepairOpt(fd, level, opt int, o []TCPRepairOpt) (err error) { return setsockopt(fd, level, opt, unsafe.Pointer(&o[0]), uintptr(SizeofTCPRepairOpt*len(o))) } +func SetsockoptTCPMD5Sig(fd, level, opt int, s *TCPMD5Sig) error { + return setsockopt(fd, level, opt, unsafe.Pointer(s), unsafe.Sizeof(*s)) +} + // Keyctl Commands (http://man7.org/linux/man-pages/man2/keyctl.2.html) // KeyctlInt calls keyctl commands in which each argument is an int. @@ -1579,6 +1582,7 @@ func BindToDevice(fd int, device string) (err error) { } //sys ptrace(request int, pid int, addr uintptr, data uintptr) (err error) +//sys ptracePtr(request int, pid int, addr uintptr, data unsafe.Pointer) (err error) = SYS_PTRACE func ptracePeek(req int, pid int, addr uintptr, out []byte) (count int, err error) { // The peek requests are machine-size oriented, so we wrap it @@ -1596,7 +1600,7 @@ func ptracePeek(req int, pid int, addr uintptr, out []byte) (count int, err erro // boundary. n := 0 if addr%SizeofPtr != 0 { - err = ptrace(req, pid, addr-addr%SizeofPtr, uintptr(unsafe.Pointer(&buf[0]))) + err = ptracePtr(req, pid, addr-addr%SizeofPtr, unsafe.Pointer(&buf[0])) if err != nil { return 0, err } @@ -1608,7 +1612,7 @@ func ptracePeek(req int, pid int, addr uintptr, out []byte) (count int, err erro for len(out) > 0 { // We use an internal buffer to guarantee alignment. // It's not documented if this is necessary, but we're paranoid. - err = ptrace(req, pid, addr+uintptr(n), uintptr(unsafe.Pointer(&buf[0]))) + err = ptracePtr(req, pid, addr+uintptr(n), unsafe.Pointer(&buf[0])) if err != nil { return n, err } @@ -1640,7 +1644,7 @@ func ptracePoke(pokeReq int, peekReq int, pid int, addr uintptr, data []byte) (c n := 0 if addr%SizeofPtr != 0 { var buf [SizeofPtr]byte - err = ptrace(peekReq, pid, addr-addr%SizeofPtr, uintptr(unsafe.Pointer(&buf[0]))) + err = ptracePtr(peekReq, pid, addr-addr%SizeofPtr, unsafe.Pointer(&buf[0])) if err != nil { return 0, err } @@ -1667,7 +1671,7 @@ func ptracePoke(pokeReq int, peekReq int, pid int, addr uintptr, data []byte) (c // Trailing edge. if len(data) > 0 { var buf [SizeofPtr]byte - err = ptrace(peekReq, pid, addr+uintptr(n), uintptr(unsafe.Pointer(&buf[0]))) + err = ptracePtr(peekReq, pid, addr+uintptr(n), unsafe.Pointer(&buf[0])) if err != nil { return n, err } @@ -1695,12 +1699,23 @@ func PtracePokeUser(pid int, addr uintptr, data []byte) (count int, err error) { return ptracePoke(PTRACE_POKEUSR, PTRACE_PEEKUSR, pid, addr, data) } +// elfNT_PRSTATUS is a copy of the debug/elf.NT_PRSTATUS constant so +// x/sys/unix doesn't need to depend on debug/elf and thus +// compress/zlib, debug/dwarf, and other packages. +const elfNT_PRSTATUS = 1 + func PtraceGetRegs(pid int, regsout *PtraceRegs) (err error) { - return ptrace(PTRACE_GETREGS, pid, 0, uintptr(unsafe.Pointer(regsout))) + var iov Iovec + iov.Base = (*byte)(unsafe.Pointer(regsout)) + iov.SetLen(int(unsafe.Sizeof(*regsout))) + return ptracePtr(PTRACE_GETREGSET, pid, uintptr(elfNT_PRSTATUS), unsafe.Pointer(&iov)) } func PtraceSetRegs(pid int, regs *PtraceRegs) (err error) { - return ptrace(PTRACE_SETREGS, pid, 0, uintptr(unsafe.Pointer(regs))) + var iov Iovec + iov.Base = (*byte)(unsafe.Pointer(regs)) + iov.SetLen(int(unsafe.Sizeof(*regs))) + return ptracePtr(PTRACE_SETREGSET, pid, uintptr(elfNT_PRSTATUS), unsafe.Pointer(&iov)) } func PtraceSetOptions(pid int, options int) (err error) { @@ -1709,7 +1724,7 @@ func PtraceSetOptions(pid int, options int) (err error) { func PtraceGetEventMsg(pid int) (msg uint, err error) { var data _C_long - err = ptrace(PTRACE_GETEVENTMSG, pid, 0, uintptr(unsafe.Pointer(&data))) + err = ptracePtr(PTRACE_GETEVENTMSG, pid, 0, unsafe.Pointer(&data)) msg = uint(data) return } @@ -1800,6 +1815,7 @@ func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err e //sysnb Capset(hdr *CapUserHeader, data *CapUserData) (err error) //sys Chdir(path string) (err error) //sys Chroot(path string) (err error) +//sys ClockAdjtime(clockid int32, buf *Timex) (state int, err error) //sys ClockGetres(clockid int32, res *Timespec) (err error) //sys ClockGettime(clockid int32, time *Timespec) (err error) //sys ClockNanosleep(clockid int32, flags int, request *Timespec, remain *Timespec) (err error) @@ -1833,6 +1849,105 @@ func Dup2(oldfd, newfd int) error { //sys Fsmount(fd int, flags int, mountAttrs int) (fsfd int, err error) //sys Fsopen(fsName string, flags int) (fd int, err error) //sys Fspick(dirfd int, pathName string, flags int) (fd int, err error) + +//sys fsconfig(fd int, cmd uint, key *byte, value *byte, aux int) (err error) + +func fsconfigCommon(fd int, cmd uint, key string, value *byte, aux int) (err error) { + var keyp *byte + if keyp, err = BytePtrFromString(key); err != nil { + return + } + return fsconfig(fd, cmd, keyp, value, aux) +} + +// FsconfigSetFlag is equivalent to fsconfig(2) called +// with cmd == FSCONFIG_SET_FLAG. +// +// fd is the filesystem context to act upon. +// key the parameter key to set. +func FsconfigSetFlag(fd int, key string) (err error) { + return fsconfigCommon(fd, FSCONFIG_SET_FLAG, key, nil, 0) +} + +// FsconfigSetString is equivalent to fsconfig(2) called +// with cmd == FSCONFIG_SET_STRING. +// +// fd is the filesystem context to act upon. +// key the parameter key to set. +// value is the parameter value to set. +func FsconfigSetString(fd int, key string, value string) (err error) { + var valuep *byte + if valuep, err = BytePtrFromString(value); err != nil { + return + } + return fsconfigCommon(fd, FSCONFIG_SET_STRING, key, valuep, 0) +} + +// FsconfigSetBinary is equivalent to fsconfig(2) called +// with cmd == FSCONFIG_SET_BINARY. +// +// fd is the filesystem context to act upon. +// key the parameter key to set. +// value is the parameter value to set. +func FsconfigSetBinary(fd int, key string, value []byte) (err error) { + if len(value) == 0 { + return EINVAL + } + return fsconfigCommon(fd, FSCONFIG_SET_BINARY, key, &value[0], len(value)) +} + +// FsconfigSetPath is equivalent to fsconfig(2) called +// with cmd == FSCONFIG_SET_PATH. +// +// fd is the filesystem context to act upon. +// key the parameter key to set. +// path is a non-empty path for specified key. +// atfd is a file descriptor at which to start lookup from or AT_FDCWD. +func FsconfigSetPath(fd int, key string, path string, atfd int) (err error) { + var valuep *byte + if valuep, err = BytePtrFromString(path); err != nil { + return + } + return fsconfigCommon(fd, FSCONFIG_SET_PATH, key, valuep, atfd) +} + +// FsconfigSetPathEmpty is equivalent to fsconfig(2) called +// with cmd == FSCONFIG_SET_PATH_EMPTY. The same as +// FconfigSetPath but with AT_PATH_EMPTY implied. +func FsconfigSetPathEmpty(fd int, key string, path string, atfd int) (err error) { + var valuep *byte + if valuep, err = BytePtrFromString(path); err != nil { + return + } + return fsconfigCommon(fd, FSCONFIG_SET_PATH_EMPTY, key, valuep, atfd) +} + +// FsconfigSetFd is equivalent to fsconfig(2) called +// with cmd == FSCONFIG_SET_FD. +// +// fd is the filesystem context to act upon. +// key the parameter key to set. +// value is a file descriptor to be assigned to specified key. +func FsconfigSetFd(fd int, key string, value int) (err error) { + return fsconfigCommon(fd, FSCONFIG_SET_FD, key, nil, value) +} + +// FsconfigCreate is equivalent to fsconfig(2) called +// with cmd == FSCONFIG_CMD_CREATE. +// +// fd is the filesystem context to act upon. +func FsconfigCreate(fd int) (err error) { + return fsconfig(fd, FSCONFIG_CMD_CREATE, nil, nil, 0) +} + +// FsconfigReconfigure is equivalent to fsconfig(2) called +// with cmd == FSCONFIG_CMD_RECONFIGURE. +// +// fd is the filesystem context to act upon. +func FsconfigReconfigure(fd int) (err error) { + return fsconfig(fd, FSCONFIG_CMD_RECONFIGURE, nil, nil, 0) +} + //sys Getdents(fd int, buf []byte) (n int, err error) = SYS_GETDENTS64 //sysnb Getpgid(pid int) (pgid int, err error) @@ -1868,9 +1983,8 @@ func Getpgrp() (pid int) { //sys OpenTree(dfd int, fileName string, flags uint) (r int, err error) //sys PerfEventOpen(attr *PerfEventAttr, pid int, cpu int, groupFd int, flags int) (fd int, err error) //sys PivotRoot(newroot string, putold string) (err error) = SYS_PIVOT_ROOT -//sysnb Prlimit(pid int, resource int, newlimit *Rlimit, old *Rlimit) (err error) = SYS_PRLIMIT64 //sys Prctl(option int, arg2 uintptr, arg3 uintptr, arg4 uintptr, arg5 uintptr) (err error) -//sys Pselect(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timespec, sigmask *Sigset_t) (n int, err error) = SYS_PSELECT6 +//sys pselect6(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timespec, sigmask *sigset_argpack) (n int, err error) //sys read(fd int, p []byte) (n int, err error) //sys Removexattr(path string, attr string) (err error) //sys Renameat2(olddirfd int, oldpath string, newdirfd int, newpath string, flags uint) (err error) @@ -1882,6 +1996,15 @@ func Getpgrp() (pid int) { //sysnb Settimeofday(tv *Timeval) (err error) //sys Setns(fd int, nstype int) (err error) +//go:linkname syscall_prlimit syscall.prlimit +func syscall_prlimit(pid, resource int, newlimit, old *syscall.Rlimit) error + +func Prlimit(pid, resource int, newlimit, old *Rlimit) error { + // Just call the syscall version, because as of Go 1.21 + // it will affect starting a new process. + return syscall_prlimit(pid, resource, (*syscall.Rlimit)(newlimit), (*syscall.Rlimit)(old)) +} + // 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. @@ -1964,8 +2087,6 @@ func Signalfd(fd int, sigmask *Sigset_t, flags int) (newfd int, err error) { //sys Unshare(flags int) (err error) //sys write(fd int, p []byte) (n 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 @@ -1973,36 +2094,46 @@ func Signalfd(fd int, sigmask *Sigset_t, flags int) (newfd int, err error) { //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)) +// minIovec is the size of the small initial allocation used by +// Readv, Writev, etc. +// +// This small allocation gets stack allocated, which lets the +// common use case of len(iovs) <= minIovs avoid more expensive +// heap allocations. +const minIovec = 8 + +// appendBytes converts bs to Iovecs and appends them to vecs. +func appendBytes(vecs []Iovec, bs [][]byte) []Iovec { + for _, b := range bs { + var v Iovec + v.SetLen(len(b)) if len(b) > 0 { - iovecs[i].Base = &b[0] + v.Base = &b[0] } else { - iovecs[i].Base = (*byte)(unsafe.Pointer(&_zero)) + v.Base = (*byte)(unsafe.Pointer(&_zero)) } + vecs = append(vecs, v) } - return iovecs + return vecs } -// 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. +// offs2lohi splits offs into its low and high order bits. func offs2lohi(offs int64) (lo, hi uintptr) { - return uintptr(offs), uintptr(uint64(offs) >> SizeofLong) + const longBits = SizeofLong * 8 + return uintptr(offs), uintptr(uint64(offs) >> (longBits - 1) >> 1) // two shifts to avoid false positive in vet } func Readv(fd int, iovs [][]byte) (n int, err error) { - iovecs := bytes2iovec(iovs) + iovecs := make([]Iovec, 0, minIovec) + iovecs = appendBytes(iovecs, 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) + iovecs := make([]Iovec, 0, minIovec) + iovecs = appendBytes(iovecs, iovs) lo, hi := offs2lohi(offset) n, err = preadv(fd, iovecs, lo, hi) readvRacedetect(iovecs, n, err) @@ -2010,7 +2141,8 @@ func Preadv(fd int, iovs [][]byte, offset int64) (n int, err error) { } func Preadv2(fd int, iovs [][]byte, offset int64, flags int) (n int, err error) { - iovecs := bytes2iovec(iovs) + iovecs := make([]Iovec, 0, minIovec) + iovecs = appendBytes(iovecs, iovs) lo, hi := offs2lohi(offset) n, err = preadv2(fd, iovecs, lo, hi, flags) readvRacedetect(iovecs, n, err) @@ -2037,7 +2169,8 @@ func readvRacedetect(iovecs []Iovec, n int, err error) { } func Writev(fd int, iovs [][]byte) (n int, err error) { - iovecs := bytes2iovec(iovs) + iovecs := make([]Iovec, 0, minIovec) + iovecs = appendBytes(iovecs, iovs) if raceenabled { raceReleaseMerge(unsafe.Pointer(&ioSync)) } @@ -2047,7 +2180,8 @@ func Writev(fd int, iovs [][]byte) (n int, err error) { } func Pwritev(fd int, iovs [][]byte, offset int64) (n int, err error) { - iovecs := bytes2iovec(iovs) + iovecs := make([]Iovec, 0, minIovec) + iovecs = appendBytes(iovecs, iovs) if raceenabled { raceReleaseMerge(unsafe.Pointer(&ioSync)) } @@ -2058,7 +2192,8 @@ func Pwritev(fd int, iovs [][]byte, offset int64) (n int, err error) { } func Pwritev2(fd int, iovs [][]byte, offset int64, flags int) (n int, err error) { - iovecs := bytes2iovec(iovs) + iovecs := make([]Iovec, 0, minIovec) + iovecs = appendBytes(iovecs, iovs) if raceenabled { raceReleaseMerge(unsafe.Pointer(&ioSync)) } @@ -2086,21 +2221,7 @@ func writevRacedetect(iovecs []Iovec, n int) { // mmap varies by architecture; see syscall_linux_*.go. //sys munmap(addr uintptr, length uintptr) (err error) - -var mapper = &mmapper{ - active: make(map[*byte][]byte), - mmap: mmap, - munmap: munmap, -} - -func Mmap(fd int, offset int64, length int, prot int, flags int) (data []byte, err error) { - return mapper.Mmap(fd, offset, length, prot, flags) -} - -func Munmap(b []byte) (err error) { - return mapper.Munmap(b) -} - +//sys mremap(oldaddr uintptr, oldlength uintptr, newlength uintptr, flags int, newaddr uintptr) (xaddr uintptr, err error) //sys Madvise(b []byte, advice int) (err error) //sys Mprotect(b []byte, prot int) (err error) //sys Mlock(b []byte) (err error) @@ -2109,6 +2230,12 @@ func Munmap(b []byte) (err error) { //sys Munlock(b []byte) (err error) //sys Munlockall() (err error) +const ( + mremapFixed = MREMAP_FIXED + mremapDontunmap = MREMAP_DONTUNMAP + mremapMaymove = MREMAP_MAYMOVE +) + // Vmsplice splices user pages from a slice of Iovecs into a pipe specified by fd, // using the specified flags. func Vmsplice(fd int, iovs []Iovec, flags int) (int, error) { @@ -2139,6 +2266,14 @@ func isGroupMember(gid int) bool { return false } +func isCapDacOverrideSet() bool { + hdr := CapUserHeader{Version: LINUX_CAPABILITY_VERSION_3} + data := [2]CapUserData{} + err := Capget(&hdr, &data[0]) + + return err == nil && data[0].Effective&(1<<CAP_DAC_OVERRIDE) != 0 +} + //sys faccessat(dirfd int, path string, mode uint32) (err error) //sys Faccessat2(dirfd int, path string, mode uint32, flags int) (err error) @@ -2174,6 +2309,12 @@ func Faccessat(dirfd int, path string, mode uint32, flags int) (err error) { var uid int if flags&AT_EACCESS != 0 { uid = Geteuid() + if uid != 0 && isCapDacOverrideSet() { + // If CAP_DAC_OVERRIDE is set, file access check is + // done by the kernel in the same way as for root + // (see generic_permission() in the Linux sources). + uid = 0 + } } else { uid = Getuid() } @@ -2379,99 +2520,76 @@ func PthreadSigmask(how int, set, oldset *Sigset_t) error { return rtSigprocmask(how, set, oldset, _C__NSIG/8) } -/* - * Unimplemented - */ -// AfsSyscall -// ArchPrctl -// Brk -// ClockNanosleep -// ClockSettime -// Clone -// EpollCtlOld -// EpollPwait -// EpollWaitOld -// Execve -// Fork -// Futex -// GetKernelSyms -// GetMempolicy -// GetRobustList -// GetThreadArea -// Getpmsg -// IoCancel -// IoDestroy -// IoGetevents -// IoSetup -// IoSubmit -// IoprioGet -// IoprioSet -// KexecLoad -// LookupDcookie -// Mbind -// MigratePages -// Mincore -// ModifyLdt -// Mount -// MovePages -// MqGetsetattr -// MqNotify -// MqOpen -// MqTimedreceive -// MqTimedsend -// MqUnlink -// Mremap -// Msgctl -// Msgget -// Msgrcv -// Msgsnd -// Nfsservctl -// Personality -// Pselect6 -// Ptrace -// Putpmsg -// Quotactl -// Readahead -// Readv -// RemapFilePages -// RestartSyscall -// RtSigaction -// RtSigpending -// RtSigqueueinfo -// RtSigreturn -// RtSigsuspend -// RtSigtimedwait -// SchedGetPriorityMax -// SchedGetPriorityMin -// SchedGetparam -// SchedGetscheduler -// SchedRrGetInterval -// SchedSetparam -// SchedYield -// Security -// Semctl -// Semget -// Semop -// Semtimedop -// SetMempolicy -// SetRobustList -// SetThreadArea -// SetTidAddress -// Sigaltstack -// Swapoff -// Swapon -// Sysfs -// TimerCreate -// TimerDelete -// TimerGetoverrun -// TimerGettime -// TimerSettime -// Tkill (obsolete) -// Tuxcall -// Umount2 -// Uselib -// Utimensat -// Vfork -// Vhangup -// Vserver -// _Sysctl +//sysnb getresuid(ruid *_C_int, euid *_C_int, suid *_C_int) +//sysnb getresgid(rgid *_C_int, egid *_C_int, sgid *_C_int) + +func Getresuid() (ruid, euid, suid int) { + var r, e, s _C_int + getresuid(&r, &e, &s) + return int(r), int(e), int(s) +} + +func Getresgid() (rgid, egid, sgid int) { + var r, e, s _C_int + getresgid(&r, &e, &s) + return int(r), int(e), int(s) +} + +// Pselect is a wrapper around the Linux pselect6 system call. +// This version does not modify the timeout argument. +func Pselect(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timespec, sigmask *Sigset_t) (n int, err error) { + // Per https://man7.org/linux/man-pages/man2/select.2.html#NOTES, + // The Linux pselect6() system call modifies its timeout argument. + // [Not modifying the argument] is the behavior required by POSIX.1-2001. + var mutableTimeout *Timespec + if timeout != nil { + mutableTimeout = new(Timespec) + *mutableTimeout = *timeout + } + + // The final argument of the pselect6() system call is not a + // sigset_t * pointer, but is instead a structure + var kernelMask *sigset_argpack + if sigmask != nil { + wordBits := 32 << (^uintptr(0) >> 63) // see math.intSize + + // A sigset stores one bit per signal, + // offset by 1 (because signal 0 does not exist). + // So the number of words needed is ⌈__C_NSIG - 1 / wordBits⌉. + sigsetWords := (_C__NSIG - 1 + wordBits - 1) / (wordBits) + + sigsetBytes := uintptr(sigsetWords * (wordBits / 8)) + kernelMask = &sigset_argpack{ + ss: sigmask, + ssLen: sigsetBytes, + } + } + + return pselect6(nfd, r, w, e, mutableTimeout, kernelMask) +} + +//sys schedSetattr(pid int, attr *SchedAttr, flags uint) (err error) +//sys schedGetattr(pid int, attr *SchedAttr, size uint, flags uint) (err error) + +// SchedSetAttr is a wrapper for sched_setattr(2) syscall. +// https://man7.org/linux/man-pages/man2/sched_setattr.2.html +func SchedSetAttr(pid int, attr *SchedAttr, flags uint) error { + if attr == nil { + return EINVAL + } + attr.Size = SizeofSchedAttr + return schedSetattr(pid, attr, flags) +} + +// SchedGetAttr is a wrapper for sched_getattr(2) syscall. +// https://man7.org/linux/man-pages/man2/sched_getattr.2.html +func SchedGetAttr(pid int, flags uint) (*SchedAttr, error) { + attr := &SchedAttr{} + if err := schedGetattr(pid, attr, SizeofSchedAttr, flags); err != nil { + return nil, err + } + return attr, nil +} + +//sys Cachestat(fd uint, crange *CachestatRange, cstat *Cachestat_t, flags uint) (err error) +//sys Mseal(b []byte, flags uint) (err error) |