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#!/bin/bash
dir="$1"
if [[ -z "$dir" ]]; then
echo need an argument directory
exit 1
fi
# We use one or the other syscalls.go file based on whether or not the
# Go runtime include syscall.PerOSThreadSyscall or not.
if [ -z "$(go doc syscall 2>/dev/null|grep PerOSThreadSyscall)" ]; then
rm -f "${dir}/syscalls_cgo.go"
cat > "${dir}/syscalls.go" <<EOF
// +build linux
package cap
import (
"libcap/psx"
"syscall"
)
// callKernel variables overridable for testing purposes.
// (Go build tree has no syscall.PerOSThreadSyscall support.)
var callWKernel = psx.Syscall3
var callWKernel6 = psx.Syscall6
var callRKernel = syscall.RawSyscall
var callRKernel6 = syscall.RawSyscall6
EOF
exit 0
fi
# pure Go support.
cat > "${dir}/syscalls.go" <<EOF
// +build linux,!cgo
package cap
import "syscall"
// callKernel variables overridable for testing purposes.
// (Go build tree contains syscall.PerOSThreadSyscall support.)
var callWKernel = syscall.PerOSThreadSyscall
var callWKernel6 = syscall.PerOSThreadSyscall6
var callRKernel = syscall.RawSyscall
var callRKernel6 = syscall.RawSyscall6
EOF
cat > "${dir}/syscalls_cgo.go" <<EOF
// +build linux,cgo
package cap
import (
"libcap/psx"
"syscall"
)
// callKernel variables overridable for testing purposes.
// We use this version when we are cgo compiling because
// we need to manage the native C pthreads too.
var callWKernel = psx.Syscall3
var callWKernel6 = psx.Syscall6
var callRKernel = syscall.RawSyscall
var callRKernel6 = syscall.RawSyscall6
EOF
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