| // Copyright 2009 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 syscall |
| |
| import "unsafe" |
| |
| const ( |
| _SYS_setgroups = SYS_SETGROUPS32 |
| _SYS_clone3 = 435 |
| _SYS_faccessat2 = 439 |
| ) |
| |
| func setTimespec(sec, nsec int64) Timespec { |
| return Timespec{Sec: int32(sec), Nsec: int32(nsec)} |
| } |
| |
| func setTimeval(sec, usec int64) Timeval { |
| return Timeval{Sec: int32(sec), Usec: int32(usec)} |
| } |
| |
| // Underlying system call writes to newoffset via pointer. |
| // Implemented in assembly to avoid allocation. |
| func seek(fd int, offset int64, whence int) (newoffset int64, err Errno) |
| |
| func Seek(fd int, offset int64, whence int) (newoffset int64, err error) { |
| newoffset, errno := seek(fd, offset, whence) |
| if errno != 0 { |
| return 0, errno |
| } |
| return newoffset, nil |
| } |
| |
| //sys accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error) |
| //sys bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) |
| //sys connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) |
| //sysnb getgroups(n int, list *_Gid_t) (nn int, err error) = SYS_GETGROUPS32 |
| //sys getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) |
| //sys setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) |
| //sysnb socket(domain int, typ int, proto int) (fd int, err error) |
| //sysnb getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) |
| //sysnb getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) |
| //sys recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) |
| //sys sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) |
| //sysnb socketpair(domain int, typ int, flags int, fd *[2]int32) (err error) |
| //sys recvmsg(s int, msg *Msghdr, flags int) (n int, err error) |
| //sys sendmsg(s int, msg *Msghdr, flags int) (n int, err error) |
| |
| // 64-bit file system and 32-bit uid calls |
| // (16-bit uid calls are not always supported in newer kernels) |
| //sys Dup2(oldfd int, newfd int) (err error) |
| //sys Fchown(fd int, uid int, gid int) (err error) = SYS_FCHOWN32 |
| //sys Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64 |
| //sys fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_FSTATAT64 |
| //sysnb Getegid() (egid int) = SYS_GETEGID32 |
| //sysnb Geteuid() (euid int) = SYS_GETEUID32 |
| //sysnb Getgid() (gid int) = SYS_GETGID32 |
| //sysnb Getuid() (uid int) = SYS_GETUID32 |
| //sysnb InotifyInit() (fd int, err error) |
| //sys Listen(s int, n int) (err error) |
| //sys Pause() (err error) |
| //sys Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error) |
| //sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) = SYS_SENDFILE64 |
| //sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) = SYS__NEWSELECT |
| //sys Setfsgid(gid int) (err error) = SYS_SETFSGID32 |
| //sys Setfsuid(uid int) (err error) = SYS_SETFSUID32 |
| //sys Shutdown(fd int, how int) (err error) |
| //sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error) |
| //sys Ustat(dev int, ubuf *Ustat_t) (err error) |
| |
| //sys futimesat(dirfd int, path string, times *[2]Timeval) (err error) |
| //sysnb Gettimeofday(tv *Timeval) (err error) |
| //sysnb Time(t *Time_t) (tt Time_t, err error) |
| //sys Utime(path string, buf *Utimbuf) (err error) |
| //sys utimes(path string, times *[2]Timeval) (err error) |
| |
| //sys pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64 |
| //sys pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64 |
| //sys Truncate(path string, length int64) (err error) = SYS_TRUNCATE64 |
| //sys Ftruncate(fd int, length int64) (err error) = SYS_FTRUNCATE64 |
| |
| //sys mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error) |
| //sys EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error) |
| |
| func Stat(path string, stat *Stat_t) (err error) { |
| return fstatat(_AT_FDCWD, path, stat, 0) |
| } |
| |
| func Lchown(path string, uid int, gid int) (err error) { |
| return Fchownat(_AT_FDCWD, path, uid, gid, _AT_SYMLINK_NOFOLLOW) |
| } |
| |
| func Lstat(path string, stat *Stat_t) (err error) { |
| return fstatat(_AT_FDCWD, path, stat, _AT_SYMLINK_NOFOLLOW) |
| } |
| |
| func Fstatfs(fd int, buf *Statfs_t) (err error) { |
| _, _, e := Syscall(SYS_FSTATFS64, uintptr(fd), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf))) |
| if e != 0 { |
| err = e |
| } |
| return |
| } |
| |
| func Statfs(path string, buf *Statfs_t) (err error) { |
| pathp, err := BytePtrFromString(path) |
| if err != nil { |
| return err |
| } |
| _, _, e := Syscall(SYS_STATFS64, uintptr(unsafe.Pointer(pathp)), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf))) |
| if e != 0 { |
| err = e |
| } |
| return |
| } |
| |
| func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) { |
| page := uintptr(offset / 4096) |
| if offset != int64(page)*4096 { |
| return 0, EINVAL |
| } |
| return mmap2(addr, length, prot, flags, fd, page) |
| } |
| |
| type rlimit32 struct { |
| Cur uint32 |
| Max uint32 |
| } |
| |
| //sysnb getrlimit(resource int, rlim *rlimit32) (err error) = SYS_GETRLIMIT |
| |
| const rlimInf32 = ^uint32(0) |
| const rlimInf64 = ^uint64(0) |
| |
| func Getrlimit(resource int, rlim *Rlimit) (err error) { |
| err = prlimit(0, resource, nil, rlim) |
| if err != ENOSYS { |
| return err |
| } |
| |
| rl := rlimit32{} |
| err = getrlimit(resource, &rl) |
| if err != nil { |
| return |
| } |
| |
| if rl.Cur == rlimInf32 { |
| rlim.Cur = rlimInf64 |
| } else { |
| rlim.Cur = uint64(rl.Cur) |
| } |
| |
| if rl.Max == rlimInf32 { |
| rlim.Max = rlimInf64 |
| } else { |
| rlim.Max = uint64(rl.Max) |
| } |
| return |
| } |
| |
| //sysnb setrlimit1(resource int, rlim *rlimit32) (err error) = SYS_SETRLIMIT |
| |
| func setrlimit(resource int, rlim *Rlimit) (err error) { |
| err = prlimit(0, resource, rlim, nil) |
| if err != ENOSYS { |
| return err |
| } |
| |
| rl := rlimit32{} |
| if rlim.Cur == rlimInf64 { |
| rl.Cur = rlimInf32 |
| } else if rlim.Cur < uint64(rlimInf32) { |
| rl.Cur = uint32(rlim.Cur) |
| } else { |
| return EINVAL |
| } |
| if rlim.Max == rlimInf64 { |
| rl.Max = rlimInf32 |
| } else if rlim.Max < uint64(rlimInf32) { |
| rl.Max = uint32(rlim.Max) |
| } else { |
| return EINVAL |
| } |
| |
| return setrlimit1(resource, &rl) |
| } |
| |
| //go:nosplit |
| func rawSetrlimit(resource int, rlim *Rlimit) Errno { |
| _, _, errno := RawSyscall6(SYS_PRLIMIT64, 0, uintptr(resource), uintptr(unsafe.Pointer(rlim)), 0, 0, 0) |
| if errno != ENOSYS { |
| return errno |
| } |
| |
| rl := rlimit32{} |
| if rlim.Cur == rlimInf64 { |
| rl.Cur = rlimInf32 |
| } else if rlim.Cur < uint64(rlimInf32) { |
| rl.Cur = uint32(rlim.Cur) |
| } else { |
| return EINVAL |
| } |
| if rlim.Max == rlimInf64 { |
| rl.Max = rlimInf32 |
| } else if rlim.Max < uint64(rlimInf32) { |
| rl.Max = uint32(rlim.Max) |
| } else { |
| return EINVAL |
| } |
| |
| _, _, errno = RawSyscall(SYS_SETRLIMIT, uintptr(resource), uintptr(unsafe.Pointer(rlim)), 0) |
| return errno |
| } |
| |
| func (r *PtraceRegs) PC() uint64 { return uint64(r.Uregs[15]) } |
| |
| func (r *PtraceRegs) SetPC(pc uint64) { r.Uregs[15] = uint32(pc) } |
| |
| func (iov *Iovec) SetLen(length int) { |
| iov.Len = uint32(length) |
| } |
| |
| func (msghdr *Msghdr) SetControllen(length int) { |
| msghdr.Controllen = uint32(length) |
| } |
| |
| func (cmsg *Cmsghdr) SetLen(length int) { |
| cmsg.Len = uint32(length) |
| } |