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-mysql2-0.5.3/ext/mysql2/client.h
Examining data/ruby-mysql2-0.5.3/ext/mysql2/infile.c
Examining data/ruby-mysql2-0.5.3/ext/mysql2/infile.h
Examining data/ruby-mysql2-0.5.3/ext/mysql2/mysql2_ext.c
Examining data/ruby-mysql2-0.5.3/ext/mysql2/mysql2_ext.h
Examining data/ruby-mysql2-0.5.3/ext/mysql2/mysql_enc_name_to_ruby.h
Examining data/ruby-mysql2-0.5.3/ext/mysql2/mysql_enc_to_ruby.h
Examining data/ruby-mysql2-0.5.3/ext/mysql2/result.c
Examining data/ruby-mysql2-0.5.3/ext/mysql2/result.h
Examining data/ruby-mysql2-0.5.3/ext/mysql2/statement.c
Examining data/ruby-mysql2-0.5.3/ext/mysql2/statement.h
Examining data/ruby-mysql2-0.5.3/ext/mysql2/wait_for_single_fd.h
Examining data/ruby-mysql2-0.5.3/ext/mysql2/client.c

FINAL RESULTS:

data/ruby-mysql2-0.5.3/ext/mysql2/client.c:233:16:  [2] (misc) open:
  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).
  int sockfd = open("/dev/null", O_RDWR | O_CLOEXEC);
data/ruby-mysql2-0.5.3/ext/mysql2/client.c:245:14:  [2] (misc) open:
  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).
    sockfd = open("/dev/null", O_RDWR);
data/ruby-mysql2-0.5.3/ext/mysql2/infile.c:14:3:  [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 error[ERROR_LEN];
data/ruby-mysql2-0.5.3/ext/mysql2/infile.c:42:14:  [2] (misc) open:
  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).
  data->fd = open(filename, O_RDONLY);
data/ruby-mysql2-0.5.3/ext/mysql2/result.c:571:11:  [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 msec_char[7] = {'0','0','0','0','0','0','\0'};
data/ruby-mysql2-0.5.3/ext/mysql2/result.c:593:11:  [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 msec_char[7] = {'0','0','0','0','0','0','\0'};
data/ruby-mysql2-0.5.3/ext/mysql2/infile.c:64:16:  [1] (buffer) read:
  Check buffer boundaries if used in a loop including recursive loops
  (CWE-120, CWE-20).
  count = (int)read(data->fd, buf, buf_len);
data/ruby-mysql2-0.5.3/ext/mysql2/result.c:573:20:  [1] (buffer) sscanf:
  It's unclear if the %s limit in the format string is small enough
  (CWE-120). Check that the limit is sufficiently small, or use a different
  input function.
          tokens = sscanf(row[i], "%2u:%2u:%2u.%6s", &hour, &min, &sec, msec_char);
data/ruby-mysql2-0.5.3/ext/mysql2/result.c:596:20:  [1] (buffer) sscanf:
  It's unclear if the %s limit in the format string is small enough
  (CWE-120). Check that the limit is sufficiently small, or use a different
  input function.
          tokens = sscanf(row[i], "%4u-%2u-%2u %2u:%2u:%2u.%6s", &year, &month, &day, &hour, &min, &sec, msec_char);

ANALYSIS SUMMARY:

Hits = 9
Lines analyzed = 4039 in approximately 0.14 seconds (29666 lines/second)
Physical Source Lines of Code (SLOC) = 3072
Hits@level = [0]   8 [1]   3 [2]   6 [3]   0 [4]   0 [5]   0
Hits@level+ = [0+]  17 [1+]   9 [2+]   6 [3+]   0 [4+]   0 [5+]   0
Hits/KSLOC@level+ = [0+] 5.53385 [1+] 2.92969 [2+] 1.95312 [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.