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/prefix-1.2.9/prefix.c

FINAL RESULTS:

data/prefix-1.2.9/prefix.c:770:5:  [4] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf.
    sprintf(out, "%s[%c-%c]", pr->prefix, pr->first, pr->last);
data/prefix-1.2.9/prefix.c:774:5:  [4] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf.
    sprintf(out, "%s", pr->prefix);
data/prefix-1.2.9/prefix.c:1336:9:  [3] (random) random:
  This function is not sufficiently random for security-related functions
  such as key and nonce creation (CWE-327). Use a more secure technique for
  acquiring random values.
	cut = (random() % 2) ? (cut - lower_dist) : (cut + upper_dist);
data/prefix-1.2.9/prefix.c:54:3:  [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 prefix[1]; /* this is a varlena structure, data follows */
data/prefix-1.2.9/prefix.c:128:5:  [2] (buffer) memcpy:
  Does not check for buffer overflows when copying to destination (CWE-120).
  Make sure destination can always hold the source data.
    memcpy(result, a, i);
data/prefix-1.2.9/prefix.c:143:3:  [2] (buffer) memcpy:
  Does not check for buffer overflows when copying to destination (CWE-120).
  Make sure destination can always hold the source data.
  memcpy(pr->prefix, prefix, s);
data/prefix-1.2.9/prefix.c:172:5:  [2] (buffer) memcpy:
  Does not check for buffer overflows when copying to destination (CWE-120).
  Make sure destination can always hold the source data.
    memcpy(prefix, pr->prefix, s-2);
data/prefix-1.2.9/prefix.c:207:3:  [2] (buffer) memcpy:
  Does not check for buffer overflows when copying to destination (CWE-120).
  Make sure destination can always hold the source data.
  memcpy(pr->prefix, str, len);
data/prefix-1.2.9/prefix.c:372:5:  [2] (buffer) memcpy:
  Does not check for buffer overflows when copying to destination (CWE-120).
  Make sure destination can always hold the source data.
    memcpy(VARDATA(vdat), pr, (size - VARHDRSZ));
data/prefix-1.2.9/prefix.c:141:11:  [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).
  int s = strlen(prefix) + 1;
data/prefix-1.2.9/prefix.c:170:13:  [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).
    int s = strlen(pr->prefix)+2;
data/prefix-1.2.9/prefix.c:206:9:  [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).
  len = strlen(pr->prefix);
data/prefix-1.2.9/prefix.c:224:33:  [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 *prefix = (char *)palloc(strlen(str)+1);
data/prefix-1.2.9/prefix.c:231:17:  [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).
  bzero(prefix, strlen(str)+1);
data/prefix-1.2.9/prefix.c:369:37:  [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).
    size = sizeof(prefix_range) + ((strlen(pr->prefix)+1)*sizeof(char)) + VARHDRSZ;
data/prefix-1.2.9/prefix.c:400:13:  [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).
  int len = strlen(pr->prefix);
data/prefix-1.2.9/prefix.c:410:12:  [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).
  int sa = strlen(a->prefix);
data/prefix-1.2.9/prefix.c:411:12:  [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).
  int sb = strlen(b->prefix);
data/prefix-1.2.9/prefix.c:437:14:  [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).
  int alen = strlen(a->prefix);
data/prefix-1.2.9/prefix.c:438:14:  [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).
  int blen = strlen(b->prefix);
data/prefix-1.2.9/prefix.c:514:8:  [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).
  sl = strlen(left->prefix);
data/prefix-1.2.9/prefix.c:515:8:  [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).
  sr = strlen(right->prefix);
data/prefix-1.2.9/prefix.c:538:14:  [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).
  int plen = strlen(pr->prefix);
data/prefix-1.2.9/prefix.c:561:14:  [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).
  int alen = strlen(a->prefix);
data/prefix-1.2.9/prefix.c:562:14:  [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).
  int blen = strlen(b->prefix);
data/prefix-1.2.9/prefix.c:575:11:  [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).
  gplen = strlen(gp);
data/prefix-1.2.9/prefix.c:633:14:  [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).
  int alen = strlen(a->prefix);
data/prefix-1.2.9/prefix.c:634:14:  [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).
  int blen = strlen(b->prefix);
data/prefix-1.2.9/prefix.c:646:11:  [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).
  gplen = strlen(gp);
data/prefix-1.2.9/prefix.c:706:10:  [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).
  return strlen(inter->prefix) > 0 || (inter->first != 0 && inter->last != 0);
data/prefix-1.2.9/prefix.c:726:36:  [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).
  int flen = t_first == NULL ? 0 : strlen(c_first);
data/prefix-1.2.9/prefix.c:727:36:  [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).
  int llen = t_last  == NULL ? 0 : strlen(c_last);
data/prefix-1.2.9/prefix.c:769:27:  [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).
    out = (char *)palloc((strlen(pr->prefix)+6) * sizeof(char));
data/prefix-1.2.9/prefix.c:773:27:  [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).
    out = (char *)palloc((strlen(pr->prefix)+1) * sizeof(char));
data/prefix-1.2.9/prefix.c:1104:11:  [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).
  olen  = strlen(orig->prefix);
data/prefix-1.2.9/prefix.c:1105:11:  [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).
  nlen  = strlen(new->prefix);
data/prefix-1.2.9/prefix.c:1107:11:  [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).
  gplen = strlen(gp);
data/prefix-1.2.9/prefix.c:1306:11:  [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).
      if( strlen(tmp_union->prefix) == 0 )
data/prefix-1.2.9/prefix.c:1319:11:  [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).
      if( strlen(tmp_union->prefix) == 0 )
data/prefix-1.2.9/prefix.c:1448:15:  [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).
      gplen = strlen(gp->prefix);
data/prefix-1.2.9/prefix.c:1701:8:  [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).
	  if( strlen(tmp_union->prefix) > 0 ) {

ANALYSIS SUMMARY:

Hits = 41
Lines analyzed = 1878 in approximately 0.07 seconds (26888 lines/second)
Physical Source Lines of Code (SLOC) = 1312
Hits@level = [0]   0 [1]  32 [2]   6 [3]   1 [4]   2 [5]   0
Hits@level+ = [0+]  41 [1+]  41 [2+]   9 [3+]   3 [4+]   2 [5+]   0
Hits/KSLOC@level+ = [0+] 31.25 [1+] 31.25 [2+] 6.85976 [3+] 2.28659 [4+] 1.52439 [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.