func addSyscall()

in rule/rule.go [538:573]

• 30 lines of code
• 8 McCabe index (conditional complexity)

func addSyscall(rule *ruleData, syscall string) error {
	if syscall == "all" {
		rule.allSyscalls = true
		return nil
	}
	rule.allSyscalls = false

	syscallNum, err := strconv.Atoi(syscall)
	if err != nil {
		if !errors.Is(err, strconv.ErrSyntax) {
			return fmt.Errorf("failed to parse syscall number '%v': %w", syscall, err)
		}

		arch := rule.arch
		if arch == "" {
			arch, err = getRuntimeArch()
			if err != nil {
				return fmt.Errorf("failed to add syscall: %w", err)
			}
		}

		// Convert name to number.
		table, found := reverseSyscall[arch]
		if !found {
			return fmt.Errorf("syscall table not found for arch %v", arch)
		}

		syscallNum, found = table[syscall]
		if !found {
			return fmt.Errorf("unknown syscall '%v' for arch %v", syscall, arch)
		}
	}

	rule.syscalls = append(rule.syscalls, uint32(syscallNum))
	return nil
}