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/sparskit-2.0.0/INFO/rinfoC.c

FINAL RESULTS:

data/sparskit-2.0.0/INFO/rinfoC.c:16:3:  [4] (format) vsprintf:
  Potential format string problem (CWE-134). Make format string constant.
  vsprintf(out1, f_str, argp);
data/sparskit-2.0.0/INFO/rinfoC.c:19:3:  [4] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf.
  sprintf(out2, "Error! %s\n", out1);
data/sparskit-2.0.0/INFO/rinfoC.c:21:3:  [4] (format) fprintf:
  If format strings can be influenced by an attacker, they can be exploited
  (CWE-134). Use a constant for the format specification.
  fprintf(stdout, out2);
data/sparskit-2.0.0/INFO/rinfoC.c:13:3:  [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 out1[256], out2[256];
data/sparskit-2.0.0/INFO/rinfoC.c:51:5:  [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 guesol[3], title[73], key[9], type[4];

ANALYSIS SUMMARY:

Hits = 5
Lines analyzed = 104 in approximately 0.03 seconds (4016 lines/second)
Physical Source Lines of Code (SLOC) = 76
Hits@level = [0]   3 [1]   0 [2]   2 [3]   0 [4]   3 [5]   0
Hits@level+ = [0+]   8 [1+]   5 [2+]   5 [3+]   3 [4+]   3 [5+]   0
Hits/KSLOC@level+ = [0+] 105.263 [1+] 65.7895 [2+] 65.7895 [3+] 39.4737 [4+] 39.4737 [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.