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/rgxg-0.1.2/src/common_macros.h
Examining data/rgxg-0.1.2/src/cidr.h
Examining data/rgxg-0.1.2/src/alternation.c
Examining data/rgxg-0.1.2/src/rgxg.h
Examining data/rgxg-0.1.2/src/range.c
Examining data/rgxg-0.1.2/src/cidr.c
Examining data/rgxg-0.1.2/src/range.h
Examining data/rgxg-0.1.2/src/escape.c
Examining data/rgxg-0.1.2/src/escape.h
Examining data/rgxg-0.1.2/src/main.c
Examining data/rgxg-0.1.2/src/alternation.h
Examining data/rgxg-0.1.2/tests/check_rgxg_net.c
Examining data/rgxg-0.1.2/tests/check_rgxg_number.c
Examining data/rgxg-0.1.2/tests/check_rgxg.c
Examining data/rgxg-0.1.2/tests/check_rgxg.h
Examining data/rgxg-0.1.2/include/rgxg/number.h
Examining data/rgxg-0.1.2/include/rgxg/net.h
Examining data/rgxg-0.1.2/include/rgxg/types.h
Examining data/rgxg-0.1.2/include/rgxg/utils.h
Examining data/rgxg-0.1.2/lib/common_macros.h
Examining data/rgxg-0.1.2/lib/net.c
Examining data/rgxg-0.1.2/lib/utils.c
Examining data/rgxg-0.1.2/lib/internal_utils.h
Examining data/rgxg-0.1.2/lib/internal_utils.c
Examining data/rgxg-0.1.2/lib/number.c

FINAL RESULTS:

data/rgxg-0.1.2/src/alternation.c:60:25:  [3] (buffer) getopt:
  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 (cont && (c = getopt (argc, argv, "hN")) != -1)
data/rgxg-0.1.2/src/cidr.c:67:25:  [3] (buffer) getopt:
  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 (cont && (c = getopt (argc, argv, "hlsuUN")) != -1)
data/rgxg-0.1.2/src/escape.c:59:25:  [3] (buffer) getopt:
  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 (cont && (c = getopt (argc, argv, "h")) != -1)
data/rgxg-0.1.2/src/range.c:95:25:  [3] (buffer) getopt:
  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 (cont && (c = getopt (argc, argv, ":b:hm:zNUlZ")) != -1)
data/rgxg-0.1.2/lib/utils.c:88:56:  [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).
            n += rgxg_utils_escape_string(patterns[i], strlen(patterns[i]), (regex ? regex+n : NULL), RGXG_NONULLBYTE);
data/rgxg-0.1.2/src/escape.c:77:45:  [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 rgxg_utils_escape_string(string, strlen(string), regex, 0);

ANALYSIS SUMMARY:

Hits = 6
Lines analyzed = 3307 in approximately 0.39 seconds (8535 lines/second)
Physical Source Lines of Code (SLOC) = 2361
Hits@level = [0]  29 [1]   2 [2]   0 [3]   4 [4]   0 [5]   0
Hits@level+ = [0+]  35 [1+]   6 [2+]   4 [3+]   4 [4+]   0 [5+]   0
Hits/KSLOC@level+ = [0+] 14.8242 [1+] 2.5413 [2+] 1.6942 [3+] 1.6942 [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.