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/swayidle-1.6/main.c

FINAL RESULTS:

data/swayidle-1.6/main.c:65:2:  [4] (format) vfprintf:
  If format strings can be influenced by an attacker, they can be exploited
  (CWE-134). Use a constant for the format specification.
	vfprintf(stderr, fmt, args);
data/swayidle-1.6/main.c:77:2:  [4] (format) vfprintf:
  If format strings can be influenced by an attacker, they can be exploited
  (CWE-134). Use a constant for the format specification.
	vfprintf(stderr, fmt, args);
data/swayidle-1.6/main.c:97:4:  [4] (shell) execvp:
  This causes a new program to execute and is difficult to use safely
  (CWE-78). try using a library call that implements the same functionality
  if available.
			execvp(cmd[0], cmd);
data/swayidle-1.6/main.c:566:14:  [3] (buffer) getopt:
  Some older implementations do not protect against internal buffer overflows
  (CWE-120, CWE-20). Check implementation on installation, or limit the size
  of all string inputs.
	while ((c = getopt(argc, argv, "hdw")) != -1) {

ANALYSIS SUMMARY:

Hits = 4
Lines analyzed = 732 in approximately 0.03 seconds (28042 lines/second)
Physical Source Lines of Code (SLOC) = 638
Hits@level = [0]   6 [1]   0 [2]   0 [3]   1 [4]   3 [5]   0
Hits@level+ = [0+]  10 [1+]   4 [2+]   4 [3+]   4 [4+]   3 [5+]   0
Hits/KSLOC@level+ = [0+] 15.674 [1+] 6.26959 [2+] 6.26959 [3+] 6.26959 [4+] 4.70219 [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.