1 // Copyright 2022 The Go Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
10 _SYS_setgroups = SYS_SETGROUPS
13 _SYS_pidfd_send_signal = 424
16 //sys EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error) = SYS_EPOLL_PWAIT
17 //sys Fchown(fd int, uid int, gid int) (err error)
18 //sys Fstatfs(fd int, buf *Statfs_t) (err error)
19 //sys Ftruncate(fd int, length int64) (err error)
20 //sysnb Getegid() (egid int)
21 //sysnb Geteuid() (euid int)
22 //sysnb Getgid() (gid int)
23 //sysnb Getuid() (uid int)
24 //sys Listen(s int, n int) (err error)
25 //sys pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
26 //sys pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
27 //sys Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error) = SYS_RENAMEAT2
28 //sys Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK
29 //sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error)
30 //sys Setfsgid(gid int) (err error)
31 //sys Setfsuid(uid int) (err error)
32 //sys Shutdown(fd int, how int) (err error)
33 //sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
34 //sys statx(dirfd int, path string, flags int, mask int, stat *statx_t) (err error)
36 // makedev makes C dev_t from major and minor numbers the glibc way:
37 // 0xMMMM_MMMM 0xmmmm_mmmm -> 0xMMMM_Mmmm_mmmM_MMmm
38 func makedev(major uint32, minor uint32) uint64 {
39 majorH := uint64(major >> 12)
40 majorL := uint64(major & 0xfff)
41 minorH := uint64(minor >> 8)
42 minorL := uint64(minor & 0xff)
43 return (majorH << 44) | (minorH << 20) | (majorL << 8) | minorL
46 func timespecFromStatxTimestamp(x statxTimestamp) Timespec {
53 func fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) {
55 // Do it the glibc way, add AT_NO_AUTOMOUNT.
56 if err = statx(dirfd, path, _AT_NO_AUTOMOUNT|flags, _STATX_BASIC_STATS, &r); err != nil {
60 stat.Dev = makedev(r.Dev_major, r.Dev_minor)
62 stat.Mode = uint32(r.Mode)
66 stat.Rdev = makedev(r.Rdev_major, r.Rdev_minor)
67 // hope we don't get to process files so large to overflow these size
69 stat.Size = int64(r.Size)
70 stat.Blksize = int32(r.Blksize)
71 stat.Blocks = int64(r.Blocks)
72 stat.Atim = timespecFromStatxTimestamp(r.Atime)
73 stat.Mtim = timespecFromStatxTimestamp(r.Mtime)
74 stat.Ctim = timespecFromStatxTimestamp(r.Ctime)
79 func Fstatat(fd int, path string, stat *Stat_t, flags int) (err error) {
80 return fstatat(fd, path, stat, flags)
83 func Fstat(fd int, stat *Stat_t) (err error) {
84 return fstatat(fd, "", stat, _AT_EMPTY_PATH)
87 func Stat(path string, stat *Stat_t) (err error) {
88 return fstatat(_AT_FDCWD, path, stat, 0)
91 func Lchown(path string, uid int, gid int) (err error) {
92 return Fchownat(_AT_FDCWD, path, uid, gid, _AT_SYMLINK_NOFOLLOW)
95 func Lstat(path string, stat *Stat_t) (err error) {
96 return fstatat(_AT_FDCWD, path, stat, _AT_SYMLINK_NOFOLLOW)
99 //sys Statfs(path string, buf *Statfs_t) (err error)
100 //sys SyncFileRange(fd int, off int64, n int64, flags int) (err error)
101 //sys Truncate(path string, length int64) (err error)
102 //sys accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error)
103 //sys bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
104 //sys connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
105 //sysnb getgroups(n int, list *_Gid_t) (nn int, err error)
106 //sys getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
107 //sys setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error)
108 //sysnb socket(domain int, typ int, proto int) (fd int, err error)
109 //sysnb socketpair(domain int, typ int, proto int, fd *[2]int32) (err error)
110 //sysnb getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
111 //sysnb getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
112 //sys recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error)
113 //sys sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error)
114 //sys recvmsg(s int, msg *Msghdr, flags int) (n int, err error)
115 //sys sendmsg(s int, msg *Msghdr, flags int) (n int, err error)
116 //sys mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error)
118 type sigset_t struct {
122 //sys pselect(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timespec, sigmask *sigset_t) (n int, err error) = SYS_PSELECT6
124 func Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) {
127 ts = &Timespec{Sec: timeout.Sec, Nsec: timeout.Usec * 1000}
129 return pselect(nfd, r, w, e, ts, nil)
132 //sysnb Gettimeofday(tv *Timeval) (err error)
134 func setTimespec(sec, nsec int64) Timespec {
135 return Timespec{Sec: sec, Nsec: nsec}
138 func setTimeval(sec, usec int64) Timeval {
139 return Timeval{Sec: sec, Usec: usec}
142 func futimesat(dirfd int, path string, tv *[2]Timeval) (err error) {
144 return utimensat(dirfd, path, nil, 0)
148 NsecToTimespec(TimevalToNsec(tv[0])),
149 NsecToTimespec(TimevalToNsec(tv[1])),
151 return utimensat(dirfd, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0)
154 func Time(t *Time_t) (Time_t, error) {
156 err := Gettimeofday(&tv)
163 return Time_t(tv.Sec), nil
166 func Utime(path string, buf *Utimbuf) error {
171 return Utimes(path, tv)
174 func utimes(path string, tv *[2]Timeval) (err error) {
176 return utimensat(_AT_FDCWD, path, nil, 0)
180 NsecToTimespec(TimevalToNsec(tv[0])),
181 NsecToTimespec(TimevalToNsec(tv[1])),
183 return utimensat(_AT_FDCWD, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0)
186 // Getrlimit prefers the prlimit64 system call.
187 func Getrlimit(resource int, rlim *Rlimit) error {
188 return prlimit(0, resource, nil, rlim)
191 // setrlimit prefers the prlimit64 system call.
192 func setrlimit(resource int, rlim *Rlimit) error {
193 return prlimit(0, resource, rlim, nil)
197 func rawSetrlimit(resource int, rlim *Rlimit) Errno {
198 _, _, errno := RawSyscall6(SYS_PRLIMIT64, 0, uintptr(resource), uintptr(unsafe.Pointer(rlim)), 0, 0, 0)
202 func (r *PtraceRegs) GetEra() uint64 { return r.Era }
204 func (r *PtraceRegs) SetEra(era uint64) { r.Era = era }
206 func (iov *Iovec) SetLen(length int) {
207 iov.Len = uint64(length)
210 func (msghdr *Msghdr) SetControllen(length int) {
211 msghdr.Controllen = uint64(length)
214 func (cmsg *Cmsghdr) SetLen(length int) {
215 cmsg.Len = uint64(length)
218 func InotifyInit() (fd int, err error) {
219 return InotifyInit1(0)
222 //sys ppoll(fds *pollFd, nfds int, timeout *Timespec, sigmask *sigset_t) (n int, err error)
225 _, err := ppoll(nil, 0, nil, nil)