--- /dev/null
+// Copyright 2018 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.
+
+// +build ignore
+
+// Generate system call table for DragonFly, NetBSD,
+// FreeBSD or OpenBSD from master list (for example,
+// /usr/src/sys/kern/syscalls.master or sys/syscall.h).
+package main
+
+import (
+ "bufio"
+ "fmt"
+ "io"
+ "io/ioutil"
+ "net/http"
+ "os"
+ "regexp"
+ "strings"
+)
+
+var (
+ goos, goarch string
+)
+
+// cmdLine returns this programs's commandline arguments
+func cmdLine() string {
+ return "go run mksysnum.go " + strings.Join(os.Args[1:], " ")
+}
+
+// buildTags returns build tags
+func buildTags() string {
+ return fmt.Sprintf("%s,%s", goarch, goos)
+}
+
+func checkErr(err error) {
+ if err != nil {
+ fmt.Fprintf(os.Stderr, "%v\n", err)
+ os.Exit(1)
+ }
+}
+
+// source string and substring slice for regexp
+type re struct {
+ str string // source string
+ sub []string // matched sub-string
+}
+
+// Match performs regular expression match
+func (r *re) Match(exp string) bool {
+ r.sub = regexp.MustCompile(exp).FindStringSubmatch(r.str)
+ if r.sub != nil {
+ return true
+ }
+ return false
+}
+
+// fetchFile fetches a text file from URL
+func fetchFile(URL string) io.Reader {
+ resp, err := http.Get(URL)
+ checkErr(err)
+ defer resp.Body.Close()
+ body, err := ioutil.ReadAll(resp.Body)
+ checkErr(err)
+ return strings.NewReader(string(body))
+}
+
+// readFile reads a text file from path
+func readFile(path string) io.Reader {
+ file, err := os.Open(os.Args[1])
+ checkErr(err)
+ return file
+}
+
+func format(name, num, proto string) string {
+ name = strings.ToUpper(name)
+ // There are multiple entries for enosys and nosys, so comment them out.
+ nm := re{str: name}
+ if nm.Match(`^SYS_E?NOSYS$`) {
+ name = fmt.Sprintf("// %s", name)
+ }
+ if name == `SYS_SYS_EXIT` {
+ name = `SYS_EXIT`
+ }
+ return fmt.Sprintf(" %s = %s; // %s\n", name, num, proto)
+}
+
+func main() {
+ // Get the OS (using GOOS_TARGET if it exist)
+ goos = os.Getenv("GOOS_TARGET")
+ if goos == "" {
+ goos = os.Getenv("GOOS")
+ }
+ // Get the architecture (using GOARCH_TARGET if it exists)
+ goarch = os.Getenv("GOARCH_TARGET")
+ if goarch == "" {
+ goarch = os.Getenv("GOARCH")
+ }
+ // Check if GOOS and GOARCH environment variables are defined
+ if goarch == "" || goos == "" {
+ fmt.Fprintf(os.Stderr, "GOARCH or GOOS not defined in environment\n")
+ os.Exit(1)
+ }
+
+ file := strings.TrimSpace(os.Args[1])
+ var syscalls io.Reader
+ if strings.HasPrefix(file, "https://") || strings.HasPrefix(file, "http://") {
+ // Download syscalls.master file
+ syscalls = fetchFile(file)
+ } else {
+ syscalls = readFile(file)
+ }
+
+ var text, line string
+ s := bufio.NewScanner(syscalls)
+ for s.Scan() {
+ t := re{str: line}
+ if t.Match(`^(.*)\\$`) {
+ // Handle continuation
+ line = t.sub[1]
+ line += strings.TrimLeft(s.Text(), " \t")
+ } else {
+ // New line
+ line = s.Text()
+ }
+ t = re{str: line}
+ if t.Match(`\\$`) {
+ continue
+ }
+ t = re{str: line}
+
+ switch goos {
+ case "dragonfly":
+ if t.Match(`^([0-9]+)\s+STD\s+({ \S+\s+(\w+).*)$`) {
+ num, proto := t.sub[1], t.sub[2]
+ name := fmt.Sprintf("SYS_%s", t.sub[3])
+ text += format(name, num, proto)
+ }
+ case "freebsd":
+ if t.Match(`^([0-9]+)\s+\S+\s+(?:(?:NO)?STD|COMPAT10)\s+({ \S+\s+(\w+).*)$`) {
+ num, proto := t.sub[1], t.sub[2]
+ name := fmt.Sprintf("SYS_%s", t.sub[3])
+ text += format(name, num, proto)
+ }
+ case "openbsd":
+ if t.Match(`^([0-9]+)\s+STD\s+(NOLOCK\s+)?({ \S+\s+\*?(\w+).*)$`) {
+ num, proto, name := t.sub[1], t.sub[3], t.sub[4]
+ text += format(name, num, proto)
+ }
+ case "netbsd":
+ if t.Match(`^([0-9]+)\s+((STD)|(NOERR))\s+(RUMP\s+)?({\s+\S+\s*\*?\s*\|(\S+)\|(\S*)\|(\w+).*\s+})(\s+(\S+))?$`) {
+ num, proto, compat := t.sub[1], t.sub[6], t.sub[8]
+ name := t.sub[7] + "_" + t.sub[9]
+ if t.sub[11] != "" {
+ name = t.sub[7] + "_" + t.sub[11]
+ }
+ name = strings.ToUpper(name)
+ if compat == "" || compat == "13" || compat == "30" || compat == "50" {
+ text += fmt.Sprintf(" %s = %s; // %s\n", name, num, proto)
+ }
+ }
+ default:
+ fmt.Fprintf(os.Stderr, "unrecognized GOOS=%s\n", goos)
+ os.Exit(1)
+
+ }
+ }
+ err := s.Err()
+ checkErr(err)
+
+ fmt.Printf(template, cmdLine(), buildTags(), text)
+}
+
+const template = `// %s
+// Code generated by the command above; see README.md. DO NOT EDIT.
+
+// +build %s
+
+package unix
+
+const(
+%s)`
projects / dotfiles / .git / blobdiff