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/an-1.2/an.c
Examining data/an-1.2/an.h
Examining data/an-1.2/bitfield.c
Examining data/an-1.2/bitfield.h
Examining data/an-1.2/malloc.c
Examining data/an-1.2/malloc.h
Examining data/an-1.2/unicode.c
Examining data/an-1.2/unicode.h
Examining data/an-1.2/words.c
Examining data/an-1.2/words.h

FINAL RESULTS:

data/an-1.2/an.c:131:19:  [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 ((opt = getopt_long (argc, argv, "c:d:hl:m:n:t:u:vw",
data/an-1.2/an.c:147:24:  [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).
            maxwords = atoi(optarg);
data/an-1.2/an.c:150:22:  [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).
            minlen = atoi(optarg);
data/an-1.2/an.c:153:24:  [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).
            maxtotal = atoi(optarg);
data/an-1.2/words.c:115:5:  [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 line[LONGEST_WORD];
data/an-1.2/words.c:117:12:  [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).
    dict = fopen(filename, "r");
data/an-1.2/words.c:123:26:  [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).
        char *l = line + strlen(line) - 1;

ANALYSIS SUMMARY:

Hits = 7
Lines analyzed = 942 in approximately 0.03 seconds (30053 lines/second)
Physical Source Lines of Code (SLOC) = 624
Hits@level = [0]  14 [1]   1 [2]   5 [3]   1 [4]   0 [5]   0
Hits@level+ = [0+]  21 [1+]   7 [2+]   6 [3+]   1 [4+]   0 [5+]   0
Hits/KSLOC@level+ = [0+] 33.6538 [1+] 11.2179 [2+] 9.61538 [3+] 1.60256 [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.