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/hostname-3.23/hostname.c

FINAL RESULTS:

data/hostname-3.23/hostname.c:467:13:  [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((o = getopt_long(argc, argv, "aAdfbF:h?iIsVy", long_options, NULL)) != -1)
data/hostname-3.23/hostname.c:61:9:  [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.
	static char buf[NI_MAXHOST];
data/hostname-3.23/hostname.c:280:4:  [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 buf[NI_MAXHOST];
data/hostname-3.23/hostname.c:360:5:  [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 buf[INET6_ADDRSTRLEN];
data/hostname-3.23/hostname.c:403:12:  [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).
	if ((fp = fopen(filename, "r")) == NULL) {
data/hostname-3.23/hostname.c:522:5:  [2] (buffer) strcpy:
  Does not check for buffer overflows when copying to destination [MS-banned]
  (CWE-120). Consider using snprintf, strcpy_s, or strlcpy (warning: strncpy
  easily misused). Risk is low because the source is a constant string.
				strcpy(name, "localhost");
data/hostname-3.23/hostname.c:190:15:  [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).
	int i, len = strlen(name);
data/hostname-3.23/hostname.c:218:12:  [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).
		for (i = strlen(name) - 1; i >= 0 && isspace(name[i]); i--);       
data/hostname-3.23/hostname.c:225:25:  [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 (sethostname(name, strlen(name))) {
data/hostname-3.23/hostname.c:235:27:  [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).
		if (setdomainname(name, strlen(name))) {

ANALYSIS SUMMARY:

Hits = 10
Lines analyzed = 553 in approximately 0.21 seconds (2687 lines/second)
Physical Source Lines of Code (SLOC) = 401
Hits@level = [0]  17 [1]   4 [2]   5 [3]   1 [4]   0 [5]   0
Hits@level+ = [0+]  27 [1+]  10 [2+]   6 [3+]   1 [4+]   0 [5+]   0
Hits/KSLOC@level+ = [0+] 67.3317 [1+] 24.9377 [2+] 14.9626 [3+] 2.49377 [4+]   0 [5+]   0
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.