Gecko [ 167.86.127.34 ]

Name	Size	Permission
js	[ DIR ]	drwxr-xr-x
asm9_unix1_amd64.s	1.02 KB	-rw-r--r--
asm9_unix2_amd64.s	1.2 KB	-rw-r--r--
asm_aix_ppc64.s	540 B	-rw-r--r--
asm_darwin_386.s	2.5 KB	-rw-r--r--
asm_darwin_amd64.s	2.82 KB	-rw-r--r--
asm_darwin_arm.s	2.81 KB	-rw-r--r--
asm_darwin_arm64.s	2.71 KB	-rw-r--r--
asm_freebsd_arm.s	2.96 KB	-rw-r--r--
asm_freebsd_arm64.s	2.68 KB	-rw-r--r--
asm_linux_386.s	4.67 KB	-rw-r--r--
asm_linux_amd64.s	3.21 KB	-rw-r--r--
asm_linux_arm.s	3.63 KB	-rw-r--r--
asm_linux_arm64.s	2.73 KB	-rw-r--r--
asm_linux_mips64x.s	2.28 KB	-rw-r--r--
asm_linux_mipsx.s	3.28 KB	-rw-r--r--
asm_linux_ppc64x.s	2.66 KB	-rw-r--r--
asm_linux_riscv64.s	2.46 KB	-rw-r--r--
asm_linux_s390x.s	4.19 KB	-rw-r--r--
asm_netbsd_arm.s	2.85 KB	-rw-r--r--
asm_netbsd_arm64.s	2.77 KB	-rw-r--r--
asm_openbsd_arm.s	3.22 KB	-rw-r--r--
asm_openbsd_arm64.s	2.49 KB	-rw-r--r--
asm_plan9_386.s	3.14 KB	-rw-r--r--
asm_plan9_amd64.s	3.06 KB	-rw-r--r--
asm_plan9_arm.s	3.25 KB	-rw-r--r--
asm_solaris_amd64.s	1.79 KB	-rw-r--r--
asm_unix_386.s	2.74 KB	-rw-r--r--
asm_unix_amd64.s	2.08 KB	-rw-r--r--
asm_windows.s	384 B	-rw-r--r--
bpf_bsd.go	4.61 KB	-rw-r--r--
bpf_darwin.go	3.97 KB	-rw-r--r--
const_plan9.go	1.2 KB	-rw-r--r--
creds_test.go	3.26 KB	-rw-r--r--
dir_plan9.go	5.62 KB	-rw-r--r--
dirent.go	3 KB	-rw-r--r--
dirent_test.go	3.28 KB	-rw-r--r--
dll_windows.go	9.72 KB	-rw-r--r--
endian_big.go	239 B	-rw-r--r--
endian_little.go	273 B	-rw-r--r--
env_plan9.go	2.15 KB	-rw-r--r--
env_unix.go	2.77 KB	-rw-r--r--
env_windows.go	1.75 KB	-rw-r--r--
errors_plan9.go	1.61 KB	-rw-r--r--
exec_aix_test.go	816 B	-rw-r--r--
exec_bsd.go	6.36 KB	-rw-r--r--
exec_darwin.go	6.76 KB	-rw-r--r--
exec_libc.go	6.96 KB	-rw-r--r--
exec_linux.go	18.34 KB	-rw-r--r--
exec_linux_test.go	18.81 KB	-rw-r--r--
exec_plan9.go	13.19 KB	-rw-r--r--
exec_solaris_test.go	808 B	-rw-r--r--
exec_unix.go	8.13 KB	-rw-r--r--
exec_unix_test.go	3.89 KB	-rw-r--r--
exec_windows.go	7.64 KB	-rw-r--r--
export_freebsd_test.go	304 B	-rw-r--r--
export_linux_test.go	252 B	-rw-r--r--
export_test.go	193 B	-rw-r--r--
export_unix_test.go	341 B	-rw-r--r--
flock.go	691 B	-rw-r--r--
flock_aix.go	564 B	-rw-r--r--
flock_darwin.go	405 B	-rw-r--r--
flock_linux_32bit.go	481 B	-rw-r--r--
forkpipe.go	501 B	-rw-r--r--
forkpipe2.go	276 B	-rw-r--r--
fs_js.go	10.46 KB	-rw-r--r--
getdirentries_test.go	2.18 KB	-rw-r--r--
lsf_linux.go	2.12 KB	-rw-r--r--
mkall.sh	12.49 KB	-rwxr-xr-x
mkasm_darwin.go	1.66 KB	-rw-r--r--
mkerrors.sh	10.65 KB	-rwxr-xr-x
mkpost.go	1.99 KB	-rw-r--r--
mksyscall.pl	9.52 KB	-rwxr-xr-x
mksyscall_libc.pl	7.8 KB	-rwxr-xr-x
mksyscall_windows.go	707 B	-rw-r--r--
mksysctl_openbsd.pl	5.04 KB	-rwxr-xr-x
mksysnum_darwin.pl	578 B	-rwxr-xr-x
mksysnum_dragonfly.pl	866 B	-rwxr-xr-x
mksysnum_freebsd.pl	1.35 KB	-rwxr-xr-x
mksysnum_linux.pl	1.26 KB	-rwxr-xr-x
mksysnum_netbsd.pl	1.01 KB	-rwxr-xr-x
mksysnum_openbsd.pl	871 B	-rwxr-xr-x
mksysnum_plan9.sh	459 B	-rwxr-xr-x
mmap_unix_test.go	544 B	-rw-r--r--
msan.go	409 B	-rw-r--r--
msan0.go	341 B	-rw-r--r--
net.go	1.19 KB	-rw-r--r--
net_js.go	2.11 KB	-rw-r--r--
netlink_linux.go	4.67 KB	-rw-r--r--
pwd_plan9.go	1.55 KB	-rw-r--r--
route_bsd.go	9.09 KB	-rw-r--r--
route_darwin.go	2.01 KB	-rw-r--r--
route_dragonfly.go	2.61 KB	-rw-r--r--
route_freebsd.go	2.67 KB	-rw-r--r--
route_freebsd_32bit.go	1.29 KB	-rw-r--r--
route_freebsd_64bit.go	724 B	-rw-r--r--
route_netbsd.go	1.43 KB	-rw-r--r--
route_openbsd.go	1.46 KB	-rw-r--r--
security_windows.go	10.12 KB	-rw-r--r--
setuidgid_32_linux.go	306 B	-rw-r--r--
setuidgid_linux.go	302 B	-rw-r--r--
sock_cloexec_linux.go	632 B	-rw-r--r--
sockcmsg_dragonfly.go	547 B	-rw-r--r--
sockcmsg_linux.go	1.12 KB	-rw-r--r--
sockcmsg_unix.go	2.56 KB	-rw-r--r--
sockcmsg_unix_other.go	957 B	-rw-r--r--
str.go	549 B	-rw-r--r--
syscall.go	3.72 KB	-rw-r--r--
syscall_aix.go	17.83 KB	-rw-r--r--
syscall_aix_ppc64.go	405 B	-rw-r--r--
syscall_bsd.go	14.07 KB	-rw-r--r--
syscall_bsd_test.go	1.16 KB	-rw-r--r--
syscall_darwin.go	14.26 KB	-rw-r--r--
syscall_darwin_386.go	2 KB	-rw-r--r--
syscall_darwin_amd64.go	1.92 KB	-rw-r--r--
syscall_darwin_arm.go	2.03 KB	-rw-r--r--
syscall_darwin_arm64.go	1.98 KB	-rw-r--r--
syscall_dragonfly.go	7.98 KB	-rw-r--r--
syscall_dragonfly_amd64.go	1.12 KB	-rw-r--r--
syscall_freebsd.go	15.82 KB	-rw-r--r--
syscall_freebsd_386.go	1.17 KB	-rw-r--r--
syscall_freebsd_amd64.go	1.12 KB	-rw-r--r--
syscall_freebsd_arm.go	1.16 KB	-rw-r--r--
syscall_freebsd_arm64.go	1.12 KB	-rw-r--r--
syscall_freebsd_test.go	1.35 KB	-rw-r--r--
syscall_getwd_bsd.go	453 B	-rw-r--r--
syscall_js.go	6.59 KB	-rw-r--r--
syscall_linux.go	26.05 KB	-rw-r--r--
syscall_linux_386.go	10.91 KB	-rw-r--r--
syscall_linux_amd64.go	5.39 KB	-rw-r--r--
syscall_linux_arm.go	7.47 KB	-rw-r--r--
syscall_linux_arm64.go	6.24 KB	-rw-r--r--
syscall_linux_mips64x.go	6.58 KB	-rw-r--r--
syscall_linux_mipsx.go	7.03 KB	-rw-r--r--
syscall_linux_ppc64x.go	5.21 KB	-rw-r--r--
syscall_linux_riscv64.go	6.4 KB	-rw-r--r--
syscall_linux_s390x.go	8.64 KB	-rw-r--r--
syscall_linux_test.go	10.61 KB	-rw-r--r--
syscall_netbsd.go	7.59 KB	-rw-r--r--
syscall_netbsd_386.go	716 B	-rw-r--r--
syscall_netbsd_amd64.go	709 B	-rw-r--r--
syscall_netbsd_arm.go	716 B	-rw-r--r--
syscall_netbsd_arm64.go	709 B	-rw-r--r--
syscall_openbsd.go	7.06 KB	-rw-r--r--
syscall_openbsd_386.go	715 B	-rw-r--r--
syscall_openbsd_amd64.go	701 B	-rw-r--r--
syscall_openbsd_arm.go	715 B	-rw-r--r--
syscall_openbsd_arm64.go	906 B	-rw-r--r--
syscall_plan9.go	8.94 KB	-rw-r--r--
syscall_plan9_test.go	1.15 KB	-rw-r--r--
syscall_ptrace_test.go	752 B	-rw-r--r--
syscall_solaris.go	15.07 KB	-rw-r--r--
syscall_solaris_amd64.go	487 B	-rw-r--r--
syscall_test.go	1.7 KB	-rw-r--r--
syscall_unix.go	8.3 KB	-rw-r--r--
syscall_unix_test.go	10.61 KB	-rw-r--r--
syscall_windows.go	42.54 KB	-rw-r--r--
syscall_windows_386.go	176 B	-rw-r--r--
syscall_windows_amd64.go	176 B	-rw-r--r--
syscall_windows_test.go	1.8 KB	-rw-r--r--
tables_js.go	19.17 KB	-rw-r--r--
time_fake.go	676 B	-rw-r--r--
time_nofake.go	350 B	-rw-r--r--
timestruct.go	1.13 KB	-rw-r--r--
types_aix.go	3.35 KB	-rw-r--r--
types_darwin.go	4.98 KB	-rw-r--r--
types_dragonfly.go	5.04 KB	-rw-r--r--
types_freebsd.go	6.96 KB	-rw-r--r--
types_linux.go	10.68 KB	-rw-r--r--
types_netbsd.go	4.77 KB	-rw-r--r--
types_openbsd.go	5.04 KB	-rw-r--r--
types_solaris.go	4.88 KB	-rw-r--r--
types_windows.go	26.96 KB	-rw-r--r--
types_windows_386.go	477 B	-rw-r--r--
types_windows_amd64.go	477 B	-rw-r--r--
types_windows_arm.go	477 B	-rw-r--r--
zerrors_aix_ppc64.go	47.16 KB	-rw-r--r--
zerrors_darwin_386.go	55.27 KB	-rw-r--r--
zerrors_darwin_amd64.go	55.27 KB	-rw-r--r--
zerrors_darwin_arm.go	46.08 KB	-rw-r--r--
zerrors_darwin_arm64.go	55.78 KB	-rw-r--r--
zerrors_dragonfly_amd64.go	59.49 KB	-rw-r--r--
zerrors_freebsd_386.go	67.35 KB	-rw-r--r--
zerrors_freebsd_amd64.go	67.4 KB	-rw-r--r--
zerrors_freebsd_arm.go	67.34 KB	-rw-r--r--
zerrors_freebsd_arm64.go	67.41 KB	-rw-r--r--
zerrors_linux_386.go	58.31 KB	-rw-r--r--
zerrors_linux_amd64.go	58.35 KB	-rw-r--r--
zerrors_linux_arm.go	58.83 KB	-rw-r--r--
zerrors_linux_arm64.go	69.52 KB	-rw-r--r--
zerrors_linux_mips.go	70.14 KB	-rw-r--r--
zerrors_linux_mips64.go	69.46 KB	-rw-r--r--
zerrors_linux_mips64le.go	69.46 KB	-rw-r--r--
zerrors_linux_mipsle.go	70.14 KB	-rw-r--r--
zerrors_linux_ppc64.go	71.84 KB	-rw-r--r--
zerrors_linux_ppc64le.go	72.8 KB	-rw-r--r--
zerrors_linux_riscv64.go	71.76 KB	-rw-r--r--
zerrors_linux_s390x.go	74.28 KB	-rw-r--r--
zerrors_netbsd_386.go	67.43 KB	-rw-r--r--
zerrors_netbsd_amd64.go	67.02 KB	-rw-r--r--
zerrors_netbsd_arm.go	66.45 KB	-rw-r--r--
zerrors_netbsd_arm64.go	67.02 KB	-rw-r--r--
zerrors_openbsd_386.go	62.47 KB	-rw-r--r--
zerrors_openbsd_amd64.go	62.43 KB	-rw-r--r--
zerrors_openbsd_arm.go	62.46 KB	-rw-r--r--
zerrors_openbsd_arm64.go	66.36 KB	-rw-r--r--
zerrors_solaris_amd64.go	50.71 KB	-rw-r--r--
zerrors_windows.go	9.97 KB	-rw-r--r--
zerrors_windows_386.go	176 B	-rw-r--r--
zerrors_windows_amd64.go	176 B	-rw-r--r--
zsyscall_aix_ppc64.go	40.02 KB	-rw-r--r--
zsyscall_darwin_386.go	53.97 KB	-rw-r--r--
zsyscall_darwin_386.s	8.65 KB	-rw-r--r--
zsyscall_darwin_amd64.go	53.83 KB	-rw-r--r--
zsyscall_darwin_amd64.s	8.65 KB	-rw-r--r--
zsyscall_darwin_arm.go	53.44 KB	-rw-r--r--
zsyscall_darwin_arm.s	8.56 KB	-rw-r--r--
zsyscall_darwin_arm64.go	53.3 KB	-rw-r--r--
zsyscall_darwin_arm64.s	8.56 KB	-rw-r--r--
zsyscall_dragonfly_amd64.go	30.9 KB	-rw-r--r--
zsyscall_freebsd_386.go	33.55 KB	-rw-r--r--
zsyscall_freebsd_amd64.go	33.41 KB	-rw-r--r--
zsyscall_freebsd_arm.go	33.58 KB	-rw-r--r--
zsyscall_freebsd_arm64.go	33.41 KB	-rw-r--r--
zsyscall_linux_386.go	35.54 KB	-rw-r--r--
zsyscall_linux_amd64.go	40.66 KB	-rw-r--r--
zsyscall_linux_arm.go	39.77 KB	-rw-r--r--
zsyscall_linux_arm64.go	38.92 KB	-rw-r--r--
zsyscall_linux_mips.go	41.52 KB	-rw-r--r--
zsyscall_linux_mips64.go	41.3 KB	-rw-r--r--
zsyscall_linux_mips64le.go	41.3 KB	-rw-r--r--
zsyscall_linux_mipsle.go	41.52 KB	-rw-r--r--
zsyscall_linux_ppc64.go	41.94 KB	-rw-r--r--
zsyscall_linux_ppc64le.go	41.94 KB	-rw-r--r--
zsyscall_linux_riscv64.go	38.95 KB	-rw-r--r--
zsyscall_linux_s390x.go	35.94 KB	-rw-r--r--
zsyscall_netbsd_386.go	29.62 KB	-rw-r--r--
zsyscall_netbsd_amd64.go	29.48 KB	-rw-r--r--
zsyscall_netbsd_arm.go	29.63 KB	-rw-r--r--
zsyscall_netbsd_arm64.go	29.48 KB	-rw-r--r--
zsyscall_openbsd_386.go	30.46 KB	-rw-r--r--
zsyscall_openbsd_amd64.go	30.32 KB	-rw-r--r--
zsyscall_openbsd_arm.go	30.47 KB	-rw-r--r--
zsyscall_openbsd_arm64.go	30.32 KB	-rw-r--r--
zsyscall_plan9_386.go	6.17 KB	-rw-r--r--
zsyscall_plan9_amd64.go	6.17 KB	-rw-r--r--
zsyscall_plan9_arm.go	6.17 KB	-rw-r--r--
zsyscall_solaris_amd64.go	35.79 KB	-rw-r--r--
zsyscall_windows.go	60.53 KB	-rw-r--r--
zsysctl_openbsd.go	11.71 KB	-rw-r--r--
zsysnum_darwin_386.go	14.55 KB	-rw-r--r--
zsysnum_darwin_amd64.go	14.55 KB	-rw-r--r--
zsysnum_darwin_arm.go	12.28 KB	-rw-r--r--
zsysnum_darwin_arm64.go	14.38 KB	-rw-r--r--
zsysnum_dragonfly_amd64.go	22.72 KB	-rw-r--r--
zsysnum_freebsd_386.go	25.65 KB	-rw-r--r--
zsysnum_freebsd_amd64.go	25.65 KB	-rw-r--r--
zsysnum_freebsd_arm.go	25.65 KB	-rw-r--r--
zsysnum_freebsd_arm64.go	36.09 KB	-rw-r--r--
zsysnum_linux_386.go	11.26 KB	-rw-r--r--
zsysnum_linux_amd64.go	10.1 KB	-rw-r--r--
zsysnum_linux_arm.go	11.55 KB	-rw-r--r--
zsysnum_linux_arm64.go	8.95 KB	-rw-r--r--
zsysnum_linux_mips.go	12.1 KB	-rw-r--r--
zsysnum_linux_mips64.go	10.93 KB	-rw-r--r--
zsysnum_linux_mips64le.go	10.93 KB	-rw-r--r--
zsysnum_linux_mipsle.go	12.1 KB	-rw-r--r--
zsysnum_linux_ppc64.go	11.46 KB	-rw-r--r--
zsysnum_linux_ppc64le.go	11.49 KB	-rw-r--r--
zsysnum_linux_riscv64.go	8.88 KB	-rw-r--r--
zsysnum_linux_s390x.go	10.64 KB	-rw-r--r--
zsysnum_netbsd_386.go	25.54 KB	-rw-r--r--
zsysnum_netbsd_amd64.go	25.55 KB	-rw-r--r--
zsysnum_netbsd_arm.go	25.54 KB	-rw-r--r--
zsysnum_netbsd_arm64.go	25.55 KB	-rw-r--r--
zsysnum_openbsd_386.go	14.15 KB	-rw-r--r--
zsysnum_openbsd_amd64.go	14.15 KB	-rw-r--r--
zsysnum_openbsd_arm.go	14.46 KB	-rw-r--r--
zsysnum_openbsd_arm64.go	14.72 KB	-rw-r--r--
zsysnum_plan9.go	1.03 KB	-rw-r--r--
zsysnum_solaris_amd64.go	289 B	-rw-r--r--
zsysnum_windows_386.go	40 B	-rw-r--r--
zsysnum_windows_amd64.go	40 B	-rw-r--r--
ztypes_aix_ppc64.go	4.17 KB	-rw-r--r--
ztypes_darwin_386.go	6.7 KB	-rw-r--r--
ztypes_darwin_amd64.go	6.92 KB	-rw-r--r--
ztypes_darwin_arm.go	6.77 KB	-rw-r--r--
ztypes_darwin_arm64.go	6.92 KB	-rw-r--r--
ztypes_dragonfly_amd64.go	6.7 KB	-rw-r--r--
ztypes_freebsd_386.go	9 KB	-rw-r--r--
ztypes_freebsd_amd64.go	9 KB	-rw-r--r--
ztypes_freebsd_arm.go	9.01 KB	-rw-r--r--
ztypes_freebsd_arm64.go	9 KB	-rw-r--r--
ztypes_linux_386.go	11.55 KB	-rw-r--r--
ztypes_linux_amd64.go	11.92 KB	-rw-r--r--
ztypes_linux_arm.go	11.44 KB	-rw-r--r--
ztypes_linux_arm64.go	10.12 KB	-rw-r--r--
ztypes_linux_mips.go	9.93 KB	-rw-r--r--
ztypes_linux_mips64.go	10.05 KB	-rw-r--r--
ztypes_linux_mips64le.go	10.05 KB	-rw-r--r--
ztypes_linux_mipsle.go	9.93 KB	-rw-r--r--
ztypes_linux_ppc64.go	10.21 KB	-rw-r--r--
ztypes_linux_ppc64le.go	10.35 KB	-rw-r--r--
ztypes_linux_riscv64.go	10.2 KB	-rw-r--r--
ztypes_linux_s390x.go	10.39 KB	-rw-r--r--
ztypes_netbsd_386.go	5.98 KB	-rw-r--r--
ztypes_netbsd_amd64.go	6.17 KB	-rw-r--r--
ztypes_netbsd_arm.go	6.13 KB	-rw-r--r--
ztypes_netbsd_arm64.go	6.17 KB	-rw-r--r--
ztypes_openbsd_386.go	6.73 KB	-rw-r--r--
ztypes_openbsd_amd64.go	6.88 KB	-rw-r--r--
ztypes_openbsd_arm.go	6.84 KB	-rw-r--r--
ztypes_openbsd_arm64.go	6.66 KB	-rw-r--r--
ztypes_solaris_amd64.go	5.56 KB	-rw-r--r--

Code Editor : syscall_linux.go

// 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.

// Linux system calls.
// This file is compiled as ordinary Go code,
// but it is also input to mksyscall,
// which parses the //sys lines and generates system call stubs.
// Note that sometimes we use a lowercase //sys name and
// wrap it in our own nicer implementation.

package syscall

import "unsafe"

func rawSyscallNoError(trap, a1, a2, a3 uintptr) (r1, r2 uintptr)

/*
 * Wrapped
 */

func Access(path string, mode uint32) (err error) {
	return Faccessat(_AT_FDCWD, path, mode, 0)
}

func Chmod(path string, mode uint32) (err error) {
	return Fchmodat(_AT_FDCWD, path, mode, 0)
}

func Chown(path string, uid int, gid int) (err error) {
	return Fchownat(_AT_FDCWD, path, uid, gid, 0)
}

func Creat(path string, mode uint32) (fd int, err error) {
	return Open(path, O_CREAT|O_WRONLY|O_TRUNC, mode)
}

//sys	faccessat(dirfd int, path string, mode uint32) (err error)

func Faccessat(dirfd int, path string, mode uint32, flags int) (err error) {
	if flags & ^(_AT_SYMLINK_NOFOLLOW|_AT_EACCESS) != 0 {
		return EINVAL
	}

// The Linux kernel faccessat system call does not take any flags.
	// The glibc faccessat implements the flags itself; see
	// https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/unix/sysv/linux/faccessat.c;hb=HEAD
	// Because people naturally expect syscall.Faccessat to act
	// like C faccessat, we do the same.

if flags == 0 {
		return faccessat(dirfd, path, mode)
	}

var st Stat_t
	if err := fstatat(dirfd, path, &st, flags&_AT_SYMLINK_NOFOLLOW); err != nil {
		return err
	}

mode &= 7
	if mode == 0 {
		return nil
	}

var uid int
	if flags&_AT_EACCESS != 0 {
		uid = Geteuid()
	} else {
		uid = Getuid()
	}

if uid == 0 {
		if mode&1 == 0 {
			// Root can read and write any file.
			return nil
		}
		if st.Mode&0111 != 0 {
			// Root can execute any file that anybody can execute.
			return nil
		}
		return EACCES
	}

var fmode uint32
	if uint32(uid) == st.Uid {
		fmode = (st.Mode >> 6) & 7
	} else {
		var gid int
		if flags&_AT_EACCESS != 0 {
			gid = Getegid()
		} else {
			gid = Getgid()
		}

if uint32(gid) == st.Gid {
			fmode = (st.Mode >> 3) & 7
		} else {
			fmode = st.Mode & 7
		}
	}

if fmode&mode == mode {
		return nil
	}

return EACCES
}

//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
	}
	return fchmodat(dirfd, path, mode)
}

//sys	linkat(olddirfd int, oldpath string, newdirfd int, newpath string, flags int) (err error)

func Link(oldpath string, newpath string) (err error) {
	return linkat(_AT_FDCWD, oldpath, _AT_FDCWD, newpath, 0)
}

func Mkdir(path string, mode uint32) (err error) {
	return Mkdirat(_AT_FDCWD, path, mode)
}

func Mknod(path string, mode uint32, dev int) (err error) {
	return Mknodat(_AT_FDCWD, path, mode, dev)
}

func Open(path string, mode int, perm uint32) (fd int, err error) {
	return openat(_AT_FDCWD, path, mode|O_LARGEFILE, perm)
}

//sys	openat(dirfd int, path string, flags int, mode uint32) (fd int, err error)

func Openat(dirfd int, path string, flags int, mode uint32) (fd int, err error) {
	return openat(dirfd, path, flags|O_LARGEFILE, mode)
}

//sys	readlinkat(dirfd int, path string, buf []byte) (n int, err error)

func Readlink(path string, buf []byte) (n int, err error) {
	return readlinkat(_AT_FDCWD, path, buf)
}

func Rename(oldpath string, newpath string) (err error) {
	return Renameat(_AT_FDCWD, oldpath, _AT_FDCWD, newpath)
}

func Rmdir(path string) error {
	return unlinkat(_AT_FDCWD, path, _AT_REMOVEDIR)
}

//sys	symlinkat(oldpath string, newdirfd int, newpath string) (err error)

func Symlink(oldpath string, newpath string) (err error) {
	return symlinkat(oldpath, _AT_FDCWD, newpath)
}

func Unlink(path string) error {
	return unlinkat(_AT_FDCWD, path, 0)
}

//sys	unlinkat(dirfd int, path string, flags int) (err error)

func Unlinkat(dirfd int, path string) error {
	return unlinkat(dirfd, path, 0)
}

func Utimes(path string, tv []Timeval) (err error) {
	if len(tv) != 2 {
		return EINVAL
	}
	return utimes(path, (*[2]Timeval)(unsafe.Pointer(&tv[0])))
}

//sys	utimensat(dirfd int, path string, times *[2]Timespec, flag int) (err error)

func UtimesNano(path string, ts []Timespec) (err error) {
	if len(ts) != 2 {
		return EINVAL
	}
	err = utimensat(_AT_FDCWD, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0)
	if err != ENOSYS {
		return err
	}
	// If the utimensat syscall isn't available (utimensat was added to Linux
	// in 2.6.22, Released, 8 July 2007) then fall back to utimes
	var tv [2]Timeval
	for i := 0; i < 2; i++ {
		tv[i].Sec = ts[i].Sec
		tv[i].Usec = ts[i].Nsec / 1000
	}
	return utimes(path, (*[2]Timeval)(unsafe.Pointer(&tv[0])))
}

func Futimesat(dirfd int, path string, tv []Timeval) (err error) {
	if len(tv) != 2 {
		return EINVAL
	}
	return futimesat(dirfd, path, (*[2]Timeval)(unsafe.Pointer(&tv[0])))
}

func Futimes(fd int, tv []Timeval) (err error) {
	// Believe it or not, this is the best we can do on Linux
	// (and is what glibc does).
	return Utimes("/proc/self/fd/"+itoa(fd), tv)
}

const ImplementsGetwd = true

//sys	Getcwd(buf []byte) (n int, err error)

func Getwd() (wd string, err error) {
	var buf [PathMax]byte
	n, err := Getcwd(buf[0:])
	if err != nil {
		return "", err
	}
	// Getcwd returns the number of bytes written to buf, including the NUL.
	if n < 1 || n > len(buf) || buf[n-1] != 0 {
		return "", EINVAL
	}
	return string(buf[0 : n-1]), nil
}

func Getgroups() (gids []int, err error) {
	n, err := getgroups(0, nil)
	if err != nil {
		return nil, err
	}
	if n == 0 {
		return nil, nil
	}

// Sanity check group count. Max is 1<<16 on Linux.
	if n < 0 || n > 1<<20 {
		return nil, EINVAL
	}

a := make([]_Gid_t, n)
	n, err = getgroups(n, &a[0])
	if err != nil {
		return nil, err
	}
	gids = make([]int, n)
	for i, v := range a[0:n] {
		gids[i] = int(v)
	}
	return
}

func Setgroups(gids []int) (err error) {
	if len(gids) == 0 {
		return setgroups(0, nil)
	}

a := make([]_Gid_t, len(gids))
	for i, v := range gids {
		a[i] = _Gid_t(v)
	}
	return setgroups(len(a), &a[0])
}

type WaitStatus uint32

// Wait status is 7 bits at bottom, either 0 (exited),
// 0x7F (stopped), or a signal number that caused an exit.
// The 0x80 bit is whether there was a core dump.
// An extra number (exit code, signal causing a stop)
// is in the high bits. At least that's the idea.
// There are various irregularities. For example, the
// "continued" status is 0xFFFF, distinguishing itself
// from stopped via the core dump bit.

const (
	mask    = 0x7F
	core    = 0x80
	exited  = 0x00
	stopped = 0x7F
	shift   = 8
)

func (w WaitStatus) Exited() bool { return w&mask == exited }

func (w WaitStatus) Signaled() bool { return w&mask != stopped && w&mask != exited }

func (w WaitStatus) Stopped() bool { return w&0xFF == stopped }

func (w WaitStatus) Continued() bool { return w == 0xFFFF }

func (w WaitStatus) CoreDump() bool { return w.Signaled() && w&core != 0 }

func (w WaitStatus) ExitStatus() int {
	if !w.Exited() {
		return -1
	}
	return int(w>>shift) & 0xFF
}

func (w WaitStatus) Signal() Signal {
	if !w.Signaled() {
		return -1
	}
	return Signal(w & mask)
}

func (w WaitStatus) StopSignal() Signal {
	if !w.Stopped() {
		return -1
	}
	return Signal(w>>shift) & 0xFF
}

func (w WaitStatus) TrapCause() int {
	if w.StopSignal() != SIGTRAP {
		return -1
	}
	return int(w>>shift) >> 8
}

//sys	wait4(pid int, wstatus *_C_int, options int, rusage *Rusage) (wpid int, err error)

func Wait4(pid int, wstatus *WaitStatus, options int, rusage *Rusage) (wpid int, err error) {
	var status _C_int
	wpid, err = wait4(pid, &status, options, rusage)
	if wstatus != nil {
		*wstatus = WaitStatus(status)
	}
	return
}

func Mkfifo(path string, mode uint32) (err error) {
	return Mknod(path, mode|S_IFIFO, 0)
}

func (sa *SockaddrInet4) sockaddr() (unsafe.Pointer, _Socklen, error) {
	if sa.Port < 0 || sa.Port > 0xFFFF {
		return nil, 0, EINVAL
	}
	sa.raw.Family = AF_INET
	p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port))
	p[0] = byte(sa.Port >> 8)
	p[1] = byte(sa.Port)
	for i := 0; i < len(sa.Addr); i++ {
		sa.raw.Addr[i] = sa.Addr[i]
	}
	return unsafe.Pointer(&sa.raw), SizeofSockaddrInet4, nil
}

func (sa *SockaddrInet6) sockaddr() (unsafe.Pointer, _Socklen, error) {
	if sa.Port < 0 || sa.Port > 0xFFFF {
		return nil, 0, EINVAL
	}
	sa.raw.Family = AF_INET6
	p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port))
	p[0] = byte(sa.Port >> 8)
	p[1] = byte(sa.Port)
	sa.raw.Scope_id = sa.ZoneId
	for i := 0; i < len(sa.Addr); i++ {
		sa.raw.Addr[i] = sa.Addr[i]
	}
	return unsafe.Pointer(&sa.raw), SizeofSockaddrInet6, nil
}

func (sa *SockaddrUnix) sockaddr() (unsafe.Pointer, _Socklen, error) {
	name := sa.Name
	n := len(name)
	if n > len(sa.raw.Path) {
		return nil, 0, EINVAL
	}
	if n == len(sa.raw.Path) && name[0] != '@' {
		return nil, 0, EINVAL
	}
	sa.raw.Family = AF_UNIX
	for i := 0; i < n; i++ {
		sa.raw.Path[i] = int8(name[i])
	}
	// length is family (uint16), name, NUL.
	sl := _Socklen(2)
	if n > 0 {
		sl += _Socklen(n) + 1
	}
	if sa.raw.Path[0] == '@' {
		sa.raw.Path[0] = 0
		// Don't count trailing NUL for abstract address.
		sl--
	}

return unsafe.Pointer(&sa.raw), sl, nil
}

type SockaddrLinklayer struct {
	Protocol uint16
	Ifindex  int
	Hatype   uint16
	Pkttype  uint8
	Halen    uint8
	Addr     [8]byte
	raw      RawSockaddrLinklayer
}

func (sa *SockaddrLinklayer) sockaddr() (unsafe.Pointer, _Socklen, error) {
	if sa.Ifindex < 0 || sa.Ifindex > 0x7fffffff {
		return nil, 0, EINVAL
	}
	sa.raw.Family = AF_PACKET
	sa.raw.Protocol = sa.Protocol
	sa.raw.Ifindex = int32(sa.Ifindex)
	sa.raw.Hatype = sa.Hatype
	sa.raw.Pkttype = sa.Pkttype
	sa.raw.Halen = sa.Halen
	for i := 0; i < len(sa.Addr); i++ {
		sa.raw.Addr[i] = sa.Addr[i]
	}
	return unsafe.Pointer(&sa.raw), SizeofSockaddrLinklayer, nil
}

type SockaddrNetlink struct {
	Family uint16
	Pad    uint16
	Pid    uint32
	Groups uint32
	raw    RawSockaddrNetlink
}

func (sa *SockaddrNetlink) sockaddr() (unsafe.Pointer, _Socklen, error) {
	sa.raw.Family = AF_NETLINK
	sa.raw.Pad = sa.Pad
	sa.raw.Pid = sa.Pid
	sa.raw.Groups = sa.Groups
	return unsafe.Pointer(&sa.raw), SizeofSockaddrNetlink, nil
}

func anyToSockaddr(rsa *RawSockaddrAny) (Sockaddr, error) {
	switch rsa.Addr.Family {
	case AF_NETLINK:
		pp := (*RawSockaddrNetlink)(unsafe.Pointer(rsa))
		sa := new(SockaddrNetlink)
		sa.Family = pp.Family
		sa.Pad = pp.Pad
		sa.Pid = pp.Pid
		sa.Groups = pp.Groups
		return sa, nil

case AF_PACKET:
		pp := (*RawSockaddrLinklayer)(unsafe.Pointer(rsa))
		sa := new(SockaddrLinklayer)
		sa.Protocol = pp.Protocol
		sa.Ifindex = int(pp.Ifindex)
		sa.Hatype = pp.Hatype
		sa.Pkttype = pp.Pkttype
		sa.Halen = pp.Halen
		for i := 0; i < len(sa.Addr); i++ {
			sa.Addr[i] = pp.Addr[i]
		}
		return sa, nil

case AF_UNIX:
		pp := (*RawSockaddrUnix)(unsafe.Pointer(rsa))
		sa := new(SockaddrUnix)
		if pp.Path[0] == 0 {
			// "Abstract" Unix domain socket.
			// Rewrite leading NUL as @ for textual display.
			// (This is the standard convention.)
			// Not friendly to overwrite in place,
			// but the callers below don't care.
			pp.Path[0] = '@'
		}

// Assume path ends at NUL.
		// This is not technically the Linux semantics for
		// abstract Unix domain sockets--they are supposed
		// to be uninterpreted fixed-size binary blobs--but
		// everyone uses this convention.
		n := 0
		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)
		return sa, nil

case AF_INET:
		pp := (*RawSockaddrInet4)(unsafe.Pointer(rsa))
		sa := new(SockaddrInet4)
		p := (*[2]byte)(unsafe.Pointer(&pp.Port))
		sa.Port = int(p[0])<<8 + int(p[1])
		for i := 0; i < len(sa.Addr); i++ {
			sa.Addr[i] = pp.Addr[i]
		}
		return sa, nil

case AF_INET6:
		pp := (*RawSockaddrInet6)(unsafe.Pointer(rsa))
		sa := new(SockaddrInet6)
		p := (*[2]byte)(unsafe.Pointer(&pp.Port))
		sa.Port = int(p[0])<<8 + int(p[1])
		sa.ZoneId = pp.Scope_id
		for i := 0; i < len(sa.Addr); i++ {
			sa.Addr[i] = pp.Addr[i]
		}
		return sa, nil
	}
	return nil, EAFNOSUPPORT
}

func Accept(fd int) (nfd int, sa Sockaddr, err error) {
	var rsa RawSockaddrAny
	var len _Socklen = SizeofSockaddrAny
	nfd, err = accept(fd, &rsa, &len)
	if err != nil {
		return
	}
	sa, err = anyToSockaddr(&rsa)
	if err != nil {
		Close(nfd)
		nfd = 0
	}
	return
}

func Accept4(fd int, flags int) (nfd int, sa Sockaddr, err error) {
	var rsa RawSockaddrAny
	var len _Socklen = SizeofSockaddrAny
	nfd, err = accept4(fd, &rsa, &len, flags)
	if err != nil {
		return
	}
	if len > SizeofSockaddrAny {
		panic("RawSockaddrAny too small")
	}
	sa, err = anyToSockaddr(&rsa)
	if err != nil {
		Close(nfd)
		nfd = 0
	}
	return
}

func Getsockname(fd int) (sa Sockaddr, err error) {
	var rsa RawSockaddrAny
	var len _Socklen = SizeofSockaddrAny
	if err = getsockname(fd, &rsa, &len); err != nil {
		return
	}
	return anyToSockaddr(&rsa)
}

func GetsockoptInet4Addr(fd, level, opt int) (value [4]byte, err error) {
	vallen := _Socklen(4)
	err = getsockopt(fd, level, opt, unsafe.Pointer(&value[0]), &vallen)
	return value, err
}

func GetsockoptIPMreq(fd, level, opt int) (*IPMreq, error) {
	var value IPMreq
	vallen := _Socklen(SizeofIPMreq)
	err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen)
	return &value, err
}

func GetsockoptIPMreqn(fd, level, opt int) (*IPMreqn, error) {
	var value IPMreqn
	vallen := _Socklen(SizeofIPMreqn)
	err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen)
	return &value, err
}

func GetsockoptIPv6Mreq(fd, level, opt int) (*IPv6Mreq, error) {
	var value IPv6Mreq
	vallen := _Socklen(SizeofIPv6Mreq)
	err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen)
	return &value, err
}

func GetsockoptIPv6MTUInfo(fd, level, opt int) (*IPv6MTUInfo, error) {
	var value IPv6MTUInfo
	vallen := _Socklen(SizeofIPv6MTUInfo)
	err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen)
	return &value, err
}

func GetsockoptICMPv6Filter(fd, level, opt int) (*ICMPv6Filter, error) {
	var value ICMPv6Filter
	vallen := _Socklen(SizeofICMPv6Filter)
	err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen)
	return &value, err
}

func GetsockoptUcred(fd, level, opt int) (*Ucred, error) {
	var value Ucred
	vallen := _Socklen(SizeofUcred)
	err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen)
	return &value, err
}

func SetsockoptIPMreqn(fd, level, opt int, mreq *IPMreqn) (err error) {
	return setsockopt(fd, level, opt, unsafe.Pointer(mreq), unsafe.Sizeof(*mreq))
}

func Recvmsg(fd int, p, oob []byte, flags int) (n, oobn int, recvflags int, from Sockaddr, err error) {
	var msg Msghdr
	var rsa RawSockaddrAny
	msg.Name = (*byte)(unsafe.Pointer(&rsa))
	msg.Namelen = uint32(SizeofSockaddrAny)
	var iov Iovec
	if len(p) > 0 {
		iov.Base = &p[0]
		iov.SetLen(len(p))
	}
	var dummy byte
	if len(oob) > 0 {
		if len(p) == 0 {
			var sockType int
			sockType, err = GetsockoptInt(fd, SOL_SOCKET, SO_TYPE)
			if err != nil {
				return
			}
			// receive at least one normal byte
			if sockType != SOCK_DGRAM {
				iov.Base = &dummy
				iov.SetLen(1)
			}
		}
		msg.Control = &oob[0]
		msg.SetControllen(len(oob))
	}
	msg.Iov = &iov
	msg.Iovlen = 1
	if n, err = recvmsg(fd, &msg, flags); err != nil {
		return
	}
	oobn = int(msg.Controllen)
	recvflags = int(msg.Flags)
	// source address is only specified if the socket is unconnected
	if rsa.Addr.Family != AF_UNSPEC {
		from, err = anyToSockaddr(&rsa)
	}
	return
}

func Sendmsg(fd int, p, oob []byte, to Sockaddr, flags int) (err error) {
	_, err = SendmsgN(fd, p, oob, to, flags)
	return
}

func SendmsgN(fd int, p, oob []byte, to Sockaddr, flags int) (n int, err error) {
	var ptr unsafe.Pointer
	var salen _Socklen
	if to != nil {
		var err error
		ptr, salen, err = to.sockaddr()
		if err != nil {
			return 0, err
		}
	}
	var msg Msghdr
	msg.Name = (*byte)(ptr)
	msg.Namelen = uint32(salen)
	var iov Iovec
	if len(p) > 0 {
		iov.Base = &p[0]
		iov.SetLen(len(p))
	}
	var dummy byte
	if len(oob) > 0 {
		if len(p) == 0 {
			var sockType int
			sockType, err = GetsockoptInt(fd, SOL_SOCKET, SO_TYPE)
			if err != nil {
				return 0, err
			}
			// send at least one normal byte
			if sockType != SOCK_DGRAM {
				iov.Base = &dummy
				iov.SetLen(1)
			}
		}
		msg.Control = &oob[0]
		msg.SetControllen(len(oob))
	}
	msg.Iov = &iov
	msg.Iovlen = 1
	if n, err = sendmsg(fd, &msg, flags); err != nil {
		return 0, err
	}
	if len(oob) > 0 && len(p) == 0 {
		n = 0
	}
	return n, nil
}

// BindToDevice binds the socket associated with fd to device.
func BindToDevice(fd int, device string) (err error) {
	return SetsockoptString(fd, SOL_SOCKET, SO_BINDTODEVICE, device)
}

//sys	ptrace(request int, pid int, addr uintptr, data uintptr) (err error)

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
	// to retrieve arbitrary-length data.

// The ptrace syscall differs from glibc's ptrace.
	// Peeks returns the word in *data, not as the return value.

var buf [sizeofPtr]byte

// Leading edge. PEEKTEXT/PEEKDATA don't require aligned
	// access (PEEKUSER warns that it might), but if we don't
	// align our reads, we might straddle an unmapped page
	// boundary and not get the bytes leading up to the page
	// boundary.
	n := 0
	if addr%sizeofPtr != 0 {
		err = ptrace(req, pid, addr-addr%sizeofPtr, uintptr(unsafe.Pointer(&buf[0])))
		if err != nil {
			return 0, err
		}
		n += copy(out, buf[addr%sizeofPtr:])
		out = out[n:]
	}

// Remainder.
	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])))
		if err != nil {
			return n, err
		}
		copied := copy(out, buf[0:])
		n += copied
		out = out[copied:]
	}

return n, nil
}

func PtracePeekText(pid int, addr uintptr, out []byte) (count int, err error) {
	return ptracePeek(PTRACE_PEEKTEXT, pid, addr, out)
}

func PtracePeekData(pid int, addr uintptr, out []byte) (count int, err error) {
	return ptracePeek(PTRACE_PEEKDATA, pid, addr, out)
}

func ptracePoke(pokeReq int, peekReq int, pid int, addr uintptr, data []byte) (count int, err error) {
	// As for ptracePeek, we need to align our accesses to deal
	// with the possibility of straddling an invalid page.

// Leading edge.
	n := 0
	if addr%sizeofPtr != 0 {
		var buf [sizeofPtr]byte
		err = ptrace(peekReq, pid, addr-addr%sizeofPtr, uintptr(unsafe.Pointer(&buf[0])))
		if err != nil {
			return 0, err
		}
		n += copy(buf[addr%sizeofPtr:], data)
		word := *((*uintptr)(unsafe.Pointer(&buf[0])))
		err = ptrace(pokeReq, pid, addr-addr%sizeofPtr, word)
		if err != nil {
			return 0, err
		}
		data = data[n:]
	}

// Interior.
	for len(data) > sizeofPtr {
		word := *((*uintptr)(unsafe.Pointer(&data[0])))
		err = ptrace(pokeReq, pid, addr+uintptr(n), word)
		if err != nil {
			return n, err
		}
		n += sizeofPtr
		data = data[sizeofPtr:]
	}

// Trailing edge.
	if len(data) > 0 {
		var buf [sizeofPtr]byte
		err = ptrace(peekReq, pid, addr+uintptr(n), uintptr(unsafe.Pointer(&buf[0])))
		if err != nil {
			return n, err
		}
		copy(buf[0:], data)
		word := *((*uintptr)(unsafe.Pointer(&buf[0])))
		err = ptrace(pokeReq, pid, addr+uintptr(n), word)
		if err != nil {
			return n, err
		}
		n += len(data)
	}

return n, nil
}

func PtracePokeText(pid int, addr uintptr, data []byte) (count int, err error) {
	return ptracePoke(PTRACE_POKETEXT, PTRACE_PEEKTEXT, pid, addr, data)
}

func PtracePokeData(pid int, addr uintptr, data []byte) (count int, err error) {
	return ptracePoke(PTRACE_POKEDATA, PTRACE_PEEKDATA, pid, addr, data)
}

func PtraceGetRegs(pid int, regsout *PtraceRegs) (err error) {
	return ptrace(PTRACE_GETREGS, pid, 0, uintptr(unsafe.Pointer(regsout)))
}

func PtraceSetRegs(pid int, regs *PtraceRegs) (err error) {
	return ptrace(PTRACE_SETREGS, pid, 0, uintptr(unsafe.Pointer(regs)))
}

func PtraceSetOptions(pid int, options int) (err error) {
	return ptrace(PTRACE_SETOPTIONS, pid, 0, uintptr(options))
}

func PtraceGetEventMsg(pid int) (msg uint, err error) {
	var data _C_long
	err = ptrace(PTRACE_GETEVENTMSG, pid, 0, uintptr(unsafe.Pointer(&data)))
	msg = uint(data)
	return
}

func PtraceCont(pid int, signal int) (err error) {
	return ptrace(PTRACE_CONT, pid, 0, uintptr(signal))
}

func PtraceSyscall(pid int, signal int) (err error) {
	return ptrace(PTRACE_SYSCALL, pid, 0, uintptr(signal))
}

func PtraceSingleStep(pid int) (err error) { return ptrace(PTRACE_SINGLESTEP, pid, 0, 0) }

func PtraceAttach(pid int) (err error) { return ptrace(PTRACE_ATTACH, pid, 0, 0) }

func PtraceDetach(pid int) (err error) { return ptrace(PTRACE_DETACH, pid, 0, 0) }

//sys	reboot(magic1 uint, magic2 uint, cmd int, arg string) (err error)

func Reboot(cmd int) (err error) {
	return reboot(LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, cmd, "")
}

func ReadDirent(fd int, buf []byte) (n int, err error) {
	return Getdents(fd, buf)
}

func direntIno(buf []byte) (uint64, bool) {
	return readInt(buf, unsafe.Offsetof(Dirent{}.Ino), unsafe.Sizeof(Dirent{}.Ino))
}

func direntReclen(buf []byte) (uint64, bool) {
	return readInt(buf, unsafe.Offsetof(Dirent{}.Reclen), unsafe.Sizeof(Dirent{}.Reclen))
}

func direntNamlen(buf []byte) (uint64, bool) {
	reclen, ok := direntReclen(buf)
	if !ok {
		return 0, false
	}
	return reclen - uint64(unsafe.Offsetof(Dirent{}.Name)), true
}

//sys	mount(source string, target string, fstype string, flags uintptr, data *byte) (err error)

func Mount(source string, target string, fstype string, flags uintptr, data string) (err error) {
	// Certain file systems get rather angry and EINVAL if you give
	// them an empty string of data, rather than NULL.
	if data == "" {
		return mount(source, target, fstype, flags, nil)
	}
	datap, err := BytePtrFromString(data)
	if err != nil {
		return err
	}
	return mount(source, target, fstype, flags, datap)
}

// Sendto
// Recvfrom
// Socketpair

/*
 * Direct access
 */
//sys	Acct(path string) (err error)
//sys	Adjtimex(buf *Timex) (state int, err error)
//sys	Chdir(path string) (err error)
//sys	Chroot(path string) (err error)
//sys	Close(fd int) (err error)
//sys	Dup(oldfd int) (fd int, err error)
//sys	Dup3(oldfd int, newfd int, flags int) (err error)
//sysnb	EpollCreate1(flag int) (fd int, err error)
//sysnb	EpollCtl(epfd int, op int, fd int, event *EpollEvent) (err error)
//sys	Fallocate(fd int, mode uint32, off int64, len int64) (err error)
//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	Flock(fd int, how int) (err error)
//sys	Fsync(fd int) (err error)
//sys	Getdents(fd int, buf []byte) (n int, err error) = SYS_GETDENTS64
//sysnb	Getpgid(pid int) (pgid int, err error)

func Getpgrp() (pid int) {
	pid, _ = Getpgid(0)
	return
}

//sysnb	Getpid() (pid int)
//sysnb	Getppid() (ppid int)
//sys	Getpriority(which int, who int) (prio int, err error)
//sysnb	Getrusage(who int, rusage *Rusage) (err error)
//sysnb	Gettid() (tid int)
//sys	Getxattr(path string, attr string, dest []byte) (sz int, err error)
//sys	InotifyAddWatch(fd int, pathname string, mask uint32) (watchdesc int, err error)
//sysnb	InotifyInit1(flags int) (fd int, err error)
//sysnb	InotifyRmWatch(fd int, watchdesc uint32) (success int, err error)
//sysnb	Kill(pid int, sig Signal) (err error)
//sys	Klogctl(typ int, buf []byte) (n int, err error) = SYS_SYSLOG
//sys	Listxattr(path string, dest []byte) (sz int, err error)
//sys	Mkdirat(dirfd int, path string, mode uint32) (err error)
//sys	Mknodat(dirfd int, path string, mode uint32, dev int) (err error)
//sys	Nanosleep(time *Timespec, leftover *Timespec) (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	read(fd int, p []byte) (n int, err error)
//sys	Removexattr(path string, attr string) (err error)
//sys	Setdomainname(p []byte) (err error)
//sys	Sethostname(p []byte) (err error)
//sysnb	Setpgid(pid int, pgid int) (err error)
//sysnb	Setsid() (pid int, err error)
//sysnb	Settimeofday(tv *Timeval) (err error)

// 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
// here rather than letting the caller think that the call succeeded.

func Setuid(uid int) (err error) {
	return EOPNOTSUPP
}

func Setgid(gid int) (err error) {
	return EOPNOTSUPP
}

//sys	Setpriority(which int, who int, prio int) (err error)
//sys	Setxattr(path string, attr string, data []byte, flags int) (err error)
//sys	Sync()
//sysnb	Sysinfo(info *Sysinfo_t) (err error)
//sys	Tee(rfd int, wfd int, len int, flags int) (n int64, err error)
//sysnb	Tgkill(tgid int, tid int, sig Signal) (err error)
//sysnb	Times(tms *Tms) (ticks uintptr, err error)
//sysnb	Umask(mask int) (oldmask int)
//sysnb	Uname(buf *Utsname) (err error)
//sys	Unmount(target string, flags int) (err error) = SYS_UMOUNT2
//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

// 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	Madvise(b []byte, advice int) (err error)
//sys	Mprotect(b []byte, prot int) (err error)
//sys	Mlock(b []byte) (err error)
//sys	Munlock(b []byte) (err error)
//sys	Mlockall(flags int) (err error)
//sys	Munlockall() (err error)

${this.title}

Code Editor : syscall_linux.go