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/ruby-fast-stemmer-1.0.2/ext/porter.c
Examining data/ruby-fast-stemmer-1.0.2/ext/porter_wrap.c

FINAL RESULTS:

data/ruby-fast-stemmer-1.0.2/ext/porter.c:431:18:  [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).
   {  FILE * f = fopen(argv[i],"r");
data/ruby-fast-stemmer-1.0.2/ext/porter.c:400:16:  [1] (buffer) getc:
  Check buffer boundaries if used in a loop including recursive loops
  (CWE-120, CWE-20).
   {  int ch = getc(f);
data/ruby-fast-stemmer-1.0.2/ext/porter.c:412:18:  [1] (buffer) getc:
  Check buffer boundaries if used in a loop including recursive loops
  (CWE-120, CWE-20).
            ch = getc(f);
data/ruby-fast-stemmer-1.0.2/ext/porter_wrap.c:27:2:  [1] (buffer) strncpy:
  Easily used incorrectly; doesn't always \0-terminate or check for invalid
  pointers [MS-banned] (CWE-120).
	strncpy(word, RSTRING_PTR(str), RSTRING_LEN(str));
data/ruby-fast-stemmer-1.0.2/ext/porter_wrap.c:30:27:  [1] (buffer) strlen:
  Does not handle strings that are not \0-terminated; if given one it may
  perform an over-read (it could cause a crash if unprotected) (CWE-126).
	length  = stem(&z, word, strlen(word)-1);

ANALYSIS SUMMARY:

Hits = 5
Lines analyzed = 483 in approximately 0.05 seconds (9772 lines/second)
Physical Source Lines of Code (SLOC) = 281
Hits@level = [0]   2 [1]   4 [2]   1 [3]   0 [4]   0 [5]   0
Hits@level+ = [0+]   7 [1+]   5 [2+]   1 [3+]   0 [4+]   0 [5+]   0
Hits/KSLOC@level+ = [0+] 24.911 [1+] 17.7936 [2+] 3.55872 [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.