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/rsstail-1.8/r2t.c

FINAL RESULTS:

data/rsstail-1.8/r2t.c:160:14:  [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((sw = getopt(argc, argv, "A:Z:1b:PHztldrpacu:Ni:n:x:y:vVh")) != -1)
data/rsstail-1.8/r2t.c:20:3:  [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(str + 1, str + what_len, strlen(str + what_len) + 1);
data/rsstail-1.8/r2t.c:40:3:  [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(lt, gt + 1, strlen(gt + 1) + 1);
data/rsstail-1.8/r2t.c:181:19:  [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).
				bytes_limit = atoi(optarg);
data/rsstail-1.8/r2t.c:198:14:  [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).
				show_n = atoi(optarg);
data/rsstail-1.8/r2t.c:211:15:  [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).
				max_age = atoi(optarg);
data/rsstail-1.8/r2t.c:280:22:  [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).
				check_interval = atoi(optarg);
data/rsstail-1.8/r2t.c:11:17:  [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).
	int what_len = strlen(what);
data/rsstail-1.8/r2t.c:20:35:  [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).
		memcpy(str + 1, str + what_len, strlen(str + what_len) + 1);
data/rsstail-1.8/r2t.c:40:22:  [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).
		memcpy(lt, gt + 1, strlen(gt + 1) + 1);
data/rsstail-1.8/r2t.c:210:20:  [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).
				dummy = optarg[strlen(optarg) - 1];
data/rsstail-1.8/r2t.c:480:45:  [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).
						if (bytes_limit != 0 && bytes_limit < strlen(stripped))
data/rsstail-1.8/r2t.c:489:45:  [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).
						if (bytes_limit != 0 && bytes_limit < strlen(item_cur -> description))
data/rsstail-1.8/r2t.c:504:44:  [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 (bytes_limit != 0 && bytes_limit < strlen(item_cur -> comments))

ANALYSIS SUMMARY:

Hits = 14
Lines analyzed = 548 in approximately 0.04 seconds (13352 lines/second)
Physical Source Lines of Code (SLOC) = 455
Hits@level = [0]  56 [1]   7 [2]   6 [3]   1 [4]   0 [5]   0
Hits@level+ = [0+]  70 [1+]  14 [2+]   7 [3+]   1 [4+]   0 [5+]   0
Hits/KSLOC@level+ = [0+] 153.846 [1+] 30.7692 [2+] 15.3846 [3+] 2.1978 [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.