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/lua-readline-2.8/C-readline.c

FINAL RESULTS:

data/lua-readline-2.8/C-readline.c:51:2:  [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 buffer[L_ctermid];
data/lua-readline-2.8/C-readline.c:55:17:  [2] (misc) fopen:
  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).
		tty_stream  = fopen(devtty, "a+");
data/lua-readline-2.8/C-readline.c:172:2:  [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 buffer[L_ctermid];
data/lua-readline-2.8/C-readline.c:177:26:  [2] (misc) fopen:
  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).
		callback_tty_stream  = fopen(devtty, "a+");
data/lua-readline-2.8/C-readline.c:260:9:  [1] (buffer) strncpy:
  Easily used incorrectly; doesn't always \0-terminate or check for invalid
  pointers [MS-banned] (CWE-120).
        strncpy(completions[i], tmp, length);

ANALYSIS SUMMARY:

Hits = 5
Lines analyzed = 358 in approximately 0.02 seconds (18384 lines/second)
Physical Source Lines of Code (SLOC) = 253
Hits@level = [0]   0 [1]   1 [2]   4 [3]   0 [4]   0 [5]   0
Hits@level+ = [0+]   5 [1+]   5 [2+]   4 [3+]   0 [4+]   0 [5+]   0
Hits/KSLOC@level+ = [0+] 19.7628 [1+] 19.7628 [2+] 15.8103 [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.