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/osdclock-0.5/osd_clock.c

FINAL RESULTS:

data/osdclock-0.5/osd_clock.c:77:15:  [3] (buffer) getopt_long:
  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_long(argc ,argv,"f:c:d:F:i:H:s:o:w:tbhr",
data/osdclock-0.5/osd_clock.c:92:10:  [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).
	delay = atoi(optarg);
data/osdclock-0.5/osd_clock.c:95:9:  [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).
	wait = atoi(optarg);
data/osdclock-0.5/osd_clock.c:98:13:  [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).
	interval = atoi(optarg);
data/osdclock-0.5/osd_clock.c:101:19:  [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).
        perhour = atoi(optarg);
data/osdclock-0.5/osd_clock.c:104:11:  [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).
	shadow = atoi(optarg);
data/osdclock-0.5/osd_clock.c:107:11:  [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).
	offset = atoi(optarg);
data/osdclock-0.5/osd_clock.c:160:5:  [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 output[255];

ANALYSIS SUMMARY:

Hits = 8
Lines analyzed = 180 in approximately 0.01 seconds (12798 lines/second)
Physical Source Lines of Code (SLOC) = 137
Hits@level = [0]   2 [1]   0 [2]   7 [3]   1 [4]   0 [5]   0
Hits@level+ = [0+]  10 [1+]   8 [2+]   8 [3+]   1 [4+]   0 [5+]   0
Hits/KSLOC@level+ = [0+] 72.9927 [1+] 58.3942 [2+] 58.3942 [3+] 7.29927 [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.