Initial commit

src/main/phpselector.go

@@ -0,0 +1,91 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"os/user"
+	"strings"
+	"syscall"
+)
+
+const (
+	PATH_TO_USER_CONFIG = "/usr/local/hestia/data/users/%s/user.conf"
+)
+
+func isExecOther(mode os.FileMode) bool {
+	return mode&0001 != 0
+}
+
+func getPHPVerFromConf(path string) (string, error) {
+	f, err := os.Open(path)
+	if err != nil {
+		return "", fmt.Errorf("user config reading error %s", err)
+	}
+	defer f.Close()
+	scanner := bufio.NewScanner(f)
+
+	for scanner.Scan() {
+		line := scanner.Text()
+		formatedLine := strings.SplitN(strings.TrimSpace(line), "=", 2)
+		if len(formatedLine) < 2 {
+			return "", fmt.Errorf("incorrect string formatting in config %s", line)
+		}
+		if strings.TrimSpace(formatedLine[0]) == "PHPCLI" {
+			result := strings.Trim(formatedLine[1], "' ")
+			return result, nil
+		}
+	}
+
+	if err := scanner.Err(); err != nil {
+		return "", fmt.Errorf("user config reading error %s", err)
+	}
+
+	return "", nil
+}
+
+func getUserPHPVer() (string, error) {
+	user, err := user.Current()
+	if err != nil {
+		return "", fmt.Errorf("user information error %s", err)
+	}
+	pathToConf := fmt.Sprintf(PATH_TO_USER_CONFIG, user.Username)
+	phpVer, err := getPHPVerFromConf(pathToConf)
+	if err != nil {
+		return "", err
+	}
+	phpPath := "/usr/bin/php" + phpVer
+	if finfo, err := os.Stat(phpPath); err != nil {
+		return "", err
+	} else {
+		fmode := finfo.Mode()
+		if !isExecOther(fmode) {
+			return "", fmt.Errorf("not executable by others %s", phpPath)
+		}
+		if strings.Contains(finfo.Name(), "hestiacp-php-selector") {
+			return "", fmt.Errorf("infinite symbolic link")
+		}
+	}
+	return phpPath, nil
+}
+
+func inner_main() int {
+	phpPath, err := getUserPHPVer()
+	if err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		return 1
+	}
+	if phpPath == "" {
+		fmt.Fprintln(os.Stderr, "no php supported")
+		return 1
+	}
+	err = syscall.Exec(phpPath, os.Args, os.Environ())
+	if err != nil {
+		fmt.Fprintln(os.Stderr, err)
+	}
+	return 1
+}
+
+func main() {
+	os.Exit(inner_main())
+}