Flawfinder version 2.0.10, (C) 2001-2019 David A. Wheeler.
Number of rules (primarily dangerous function names) in C/C++ ruleset: 223
Examining data/ruby-serialport-1.3.1/ext/native/win_serialport_impl.c
Examining data/ruby-serialport-1.3.1/ext/native/serialport.h
Examining data/ruby-serialport-1.3.1/ext/native/serialport.c
Examining data/ruby-serialport-1.3.1/ext/native/posix_serialport_impl.c

FINAL RESULTS:

data/ruby-serialport-1.3.1/ext/native/posix_serialport_impl.c:137:9:  [2] (misc) open:
  Check when opening files - can an attacker redirect it (via symlinks),
  force the opening of special file type (e.g., device files), move things
  around to create a race condition, control its ancestors, or change its
  contents? (CWE-362).
   fd = open(port, O_RDWR | O_NOCTTY | O_NDELAY);
data/ruby-serialport-1.3.1/ext/native/win_serialport_impl.c:74:4:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
   char port[260]; /* Windows XP MAX_PATH. See http://msdn.microsoft.com/en-us/library/aa365247(VS.85).aspx */
data/ruby-serialport-1.3.1/ext/native/win_serialport_impl.c:115:9:  [2] (misc) open:
  Check when opening files - can an attacker redirect it (via symlinks),
  force the opening of special file type (e.g., device files), move things
  around to create a race condition, control its ancestors, or change its
  contents? (CWE-362).
   fd = open(port, O_BINARY | O_RDWR);

ANALYSIS SUMMARY:

Hits = 3
Lines analyzed = 2161 in approximately 0.07 seconds (32266 lines/second)
Physical Source Lines of Code (SLOC) = 1524
Hits@level = [0]   3 [1]   0 [2]   3 [3]   0 [4]   0 [5]   0
Hits@level+ = [0+]   6 [1+]   3 [2+]   3 [3+]   0 [4+]   0 [5+]   0
Hits/KSLOC@level+ = [0+] 3.93701 [1+] 1.9685 [2+] 1.9685 [3+]   0 [4+]   0 [5+]   0
Dot directories skipped = 1 (--followdotdir overrides)
Minimum risk level = 1
Not every hit is necessarily a security vulnerability.
There may be other security vulnerabilities; review your code!
See 'Secure Programming HOWTO'
(https://dwheeler.com/secure-programs) for more information.