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/wmsun-1.05/SunRise.c
Examining data/wmsun-1.05/wmsun.c

FINAL RESULTS:

data/wmsun-1.05/wmsun.c:339:17:  [2] (integer) atoi:
  Unless checked, the resulting number can exceed the expected range
  (CWE-190). If source untrusted, check both minimum and maximum, even if the
  input had no minus sign (large numbers can roll over into negative number;
  consider saving to an unsigned value if that is intended).
	    UserDate = atoi(argv[++i]);

ANALYSIS SUMMARY:

Hits = 1
Lines analyzed = 589 in approximately 0.05 seconds (12848 lines/second)
Physical Source Lines of Code (SLOC) = 328
Hits@level = [0]   9 [1]   0 [2]   1 [3]   0 [4]   0 [5]   0
Hits@level+ = [0+]  10 [1+]   1 [2+]   1 [3+]   0 [4+]   0 [5+]   0
Hits/KSLOC@level+ = [0+] 30.4878 [1+] 3.04878 [2+] 3.04878 [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.