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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
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-rw-r--r--
exec_plan9.go
13.19
KB
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exec_solaris_test.go
808
B
-rw-r--r--
exec_unix.go
8.13
KB
-rw-r--r--
exec_unix_test.go
3.89
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-rw-r--r--
exec_windows.go
7.64
KB
-rw-r--r--
export_freebsd_test.go
304
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-rw-r--r--
export_linux_test.go
252
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-rw-r--r--
export_test.go
193
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-rw-r--r--
export_unix_test.go
341
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-rw-r--r--
flock.go
691
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-rw-r--r--
flock_aix.go
564
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-rw-r--r--
flock_darwin.go
405
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-rw-r--r--
flock_linux_32bit.go
481
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-rw-r--r--
forkpipe.go
501
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-rw-r--r--
forkpipe2.go
276
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-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
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-rwxr-xr-x
mksysnum_plan9.sh
459
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-rwxr-xr-x
mmap_unix_test.go
544
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-rw-r--r--
msan.go
409
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-rw-r--r--
msan0.go
341
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-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
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-rw-r--r--
zsysnum_linux_s390x.go
10.64
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-rw-r--r--
zsysnum_netbsd_386.go
25.54
KB
-rw-r--r--
zsysnum_netbsd_amd64.go
25.55
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-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
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ztypes_linux_arm64.go
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ztypes_linux_mips.go
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ztypes_linux_mips64.go
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ztypes_linux_ppc64.go
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ztypes_linux_riscv64.go
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ztypes_netbsd_386.go
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ztypes_openbsd_arm.go
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ztypes_openbsd_arm64.go
6.66
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ztypes_solaris_amd64.go
5.56
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Code Editor : exec_darwin.go
// Copyright 2011 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" ) type SysProcAttr struct { Chroot string // Chroot. Credential *Credential // Credential. Ptrace bool // Enable tracing. Setsid bool // Create session. Setpgid bool // Set process group ID to Pgid, or, if Pgid == 0, to new pid. Setctty bool // Set controlling terminal to fd Ctty Noctty bool // Detach fd 0 from controlling terminal Ctty int // Controlling TTY fd Foreground bool // Place child's process group in foreground. (Implies Setpgid. Uses Ctty as fd of controlling TTY) Pgid int // Child's process group ID if Setpgid. } // Implemented in runtime package. func runtime_BeforeFork() func runtime_AfterFork() func runtime_AfterForkInChild() // Fork, dup fd onto 0..len(fd), and exec(argv0, argvv, envv) in child. // If a dup or exec fails, write the errno error to pipe. // (Pipe is close-on-exec so if exec succeeds, it will be closed.) // In the child, this function must not acquire any locks, because // they might have been locked at the time of the fork. This means // no rescheduling, no malloc calls, and no new stack segments. // For the same reason compiler does not race instrument it. // The calls to rawSyscall are okay because they are assembly // functions that do not grow the stack. //go:norace func forkAndExecInChild(argv0 *byte, argv, envv []*byte, chroot, dir *byte, attr *ProcAttr, sys *SysProcAttr, pipe int) (pid int, err Errno) { // Declare all variables at top in case any // declarations require heap allocation (e.g., err1). var ( r1 uintptr err1 Errno nextfd int i int ) // guard against side effects of shuffling fds below. // Make sure that nextfd is beyond any currently open files so // that we can't run the risk of overwriting any of them. fd := make([]int, len(attr.Files)) nextfd = len(attr.Files) for i, ufd := range attr.Files { if nextfd < int(ufd) { nextfd = int(ufd) } fd[i] = int(ufd) } nextfd++ // About to call fork. // No more allocation or calls of non-assembly functions. runtime_BeforeFork() r1, _, err1 = rawSyscall(funcPC(libc_fork_trampoline), 0, 0, 0) if err1 != 0 { runtime_AfterFork() return 0, err1 } if r1 != 0 { // parent; return PID runtime_AfterFork() return int(r1), 0 } // Fork succeeded, now in child. runtime_AfterForkInChild() // Enable tracing if requested. if sys.Ptrace { if err := ptrace(PTRACE_TRACEME, 0, 0, 0); err != nil { err1 = err.(Errno) goto childerror } } // Session ID if sys.Setsid { _, _, err1 = rawSyscall(funcPC(libc_setsid_trampoline), 0, 0, 0) if err1 != 0 { goto childerror } } // Set process group if sys.Setpgid || sys.Foreground { // Place child in process group. _, _, err1 = rawSyscall(funcPC(libc_setpgid_trampoline), 0, uintptr(sys.Pgid), 0) if err1 != 0 { goto childerror } } if sys.Foreground { pgrp := sys.Pgid if pgrp == 0 { r1, _, err1 = rawSyscall(funcPC(libc_getpid_trampoline), 0, 0, 0) if err1 != 0 { goto childerror } pgrp = int(r1) } // Place process group in foreground. _, _, err1 = rawSyscall(funcPC(libc_ioctl_trampoline), uintptr(sys.Ctty), uintptr(TIOCSPGRP), uintptr(unsafe.Pointer(&pgrp))) if err1 != 0 { goto childerror } } // Chroot if chroot != nil { _, _, err1 = rawSyscall(funcPC(libc_chroot_trampoline), uintptr(unsafe.Pointer(chroot)), 0, 0) if err1 != 0 { goto childerror } } // User and groups if cred := sys.Credential; cred != nil { ngroups := uintptr(len(cred.Groups)) groups := uintptr(0) if ngroups > 0 { groups = uintptr(unsafe.Pointer(&cred.Groups[0])) } if !cred.NoSetGroups { _, _, err1 = rawSyscall(funcPC(libc_setgroups_trampoline), ngroups, groups, 0) if err1 != 0 { goto childerror } } _, _, err1 = rawSyscall(funcPC(libc_setgid_trampoline), uintptr(cred.Gid), 0, 0) if err1 != 0 { goto childerror } _, _, err1 = rawSyscall(funcPC(libc_setuid_trampoline), uintptr(cred.Uid), 0, 0) if err1 != 0 { goto childerror } } // Chdir if dir != nil { _, _, err1 = rawSyscall(funcPC(libc_chdir_trampoline), uintptr(unsafe.Pointer(dir)), 0, 0) if err1 != 0 { goto childerror } } // Pass 1: look for fd[i] < i and move those up above len(fd) // so that pass 2 won't stomp on an fd it needs later. if pipe < nextfd { _, _, err1 = rawSyscall(funcPC(libc_dup2_trampoline), uintptr(pipe), uintptr(nextfd), 0) if err1 != 0 { goto childerror } rawSyscall(funcPC(libc_fcntl_trampoline), uintptr(nextfd), F_SETFD, FD_CLOEXEC) pipe = nextfd nextfd++ } for i = 0; i < len(fd); i++ { if fd[i] >= 0 && fd[i] < int(i) { if nextfd == pipe { // don't stomp on pipe nextfd++ } _, _, err1 = rawSyscall(funcPC(libc_dup2_trampoline), uintptr(fd[i]), uintptr(nextfd), 0) if err1 != 0 { goto childerror } rawSyscall(funcPC(libc_fcntl_trampoline), uintptr(nextfd), F_SETFD, FD_CLOEXEC) fd[i] = nextfd nextfd++ } } // Pass 2: dup fd[i] down onto i. for i = 0; i < len(fd); i++ { if fd[i] == -1 { rawSyscall(funcPC(libc_close_trampoline), uintptr(i), 0, 0) continue } if fd[i] == int(i) { // dup2(i, i) won't clear close-on-exec flag on Linux, // probably not elsewhere either. _, _, err1 = rawSyscall(funcPC(libc_fcntl_trampoline), uintptr(fd[i]), F_SETFD, 0) if err1 != 0 { goto childerror } continue } // The new fd is created NOT close-on-exec, // which is exactly what we want. _, _, err1 = rawSyscall(funcPC(libc_dup2_trampoline), uintptr(fd[i]), uintptr(i), 0) if err1 != 0 { goto childerror } } // By convention, we don't close-on-exec the fds we are // started with, so if len(fd) < 3, close 0, 1, 2 as needed. // Programs that know they inherit fds >= 3 will need // to set them close-on-exec. for i = len(fd); i < 3; i++ { rawSyscall(funcPC(libc_close_trampoline), uintptr(i), 0, 0) } // Detach fd 0 from tty if sys.Noctty { _, _, err1 = rawSyscall(funcPC(libc_ioctl_trampoline), 0, uintptr(TIOCNOTTY), 0) if err1 != 0 { goto childerror } } // Set the controlling TTY to Ctty if sys.Setctty { _, _, err1 = rawSyscall(funcPC(libc_ioctl_trampoline), uintptr(sys.Ctty), uintptr(TIOCSCTTY), 0) if err1 != 0 { goto childerror } } // Time to exec. _, _, err1 = rawSyscall(funcPC(libc_execve_trampoline), uintptr(unsafe.Pointer(argv0)), uintptr(unsafe.Pointer(&argv[0])), uintptr(unsafe.Pointer(&envv[0]))) childerror: // send error code on pipe rawSyscall(funcPC(libc_write_trampoline), uintptr(pipe), uintptr(unsafe.Pointer(&err1)), unsafe.Sizeof(err1)) for { rawSyscall(funcPC(libc_exit_trampoline), 253, 0, 0) } }
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