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/a56-1.3+dfsg/getopt.c
Examining data/a56-1.3+dfsg/torom.c
Examining data/a56-1.3+dfsg/keybld.c
Examining data/a56-1.3+dfsg/toktab.c
Examining data/a56-1.3+dfsg/frac2int.c
Examining data/a56-1.3+dfsg/debian/a56-tobin.c
Examining data/a56-1.3+dfsg/debian/bin2h.c
Examining data/a56-1.3+dfsg/toomf.c
Examining data/a56-1.3+dfsg/a56.h
Examining data/a56-1.3+dfsg/lex.c
Examining data/a56-1.3+dfsg/subs.c
Examining data/a56-1.3+dfsg/main.c

FINAL RESULTS:

data/a56-1.3+dfsg/keybld.c:29:8:  [5] (buffer) gets:
  Does not check for buffer overflows (CWE-120, CWE-20). Use fgets() instead.
	while(gets(buf)) {
data/a56-1.3+dfsg/toomf.c:46:8:  [5] (buffer) gets:
  Does not check for buffer overflows (CWE-120, CWE-20). Use fgets() instead.
	while(gets(buf)) {
data/a56-1.3+dfsg/torom.c:41:8:  [5] (buffer) gets:
  Does not check for buffer overflows (CWE-120, CWE-20). Use fgets() instead.
	while(gets(buf)) {
data/a56-1.3+dfsg/a56.h:90:11:  [4] (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).
		(char *)strcpy((char *)malloc(strlen(s)+1),(s)) : NULL)
data/a56-1.3+dfsg/frac2int.c:56:37:  [4] (shell) system:
  This causes a new program to execute and is difficult to use safely
  (CWE-78). try using a library call that implements the same functionality
  if available.
             complement, fractional system.
data/a56-1.3+dfsg/lex.c:474:3:  [4] (format) printf:
  If format strings can be influenced by an attacker, they can be exploited
  (CWE-134). Use a constant for the format specification.
		printf(c < ' ' ? "<\\z%02X>%s" : "<%c>", c, c == '\n' ? "\n" : "");
data/a56-1.3+dfsg/subs.c:72:2:  [4] (format) fprintf:
  If format strings can be influenced by an attacker, they can be exploited
  (CWE-134). Use a constant for the format specification.
	fprintf(stderr, c, a1, a2, a3, a4, a5, a6, a7, a8);
data/a56-1.3+dfsg/getopt.c:51:1:  [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.
getopt(nargc,nargv,ostr)
data/a56-1.3+dfsg/getopt.c:112:14:  [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 ((C = getopt (argc, argv, optstring)) != EOF)
data/a56-1.3+dfsg/main.c:55:13:  [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((c = getopt(argc, argv, "bldo:")) != EOF) switch (c) {
data/a56-1.3+dfsg/debian/a56-tobin.c:42:8:  [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).
  fd = open (argv[1], O_WRONLY | O_CREAT | O_TRUNC, 0644);
data/a56-1.3+dfsg/debian/bin2h.c:32:20:  [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_per_line = atoi (argv[1]);
data/a56-1.3+dfsg/keybld.c:23:1:  [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[1024];
data/a56-1.3+dfsg/keybld.c:137:2:  [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 tmp[1024];
data/a56-1.3+dfsg/keybld.c:156:3:  [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(tmp, "<nothing>");
data/a56-1.3+dfsg/lex.c:40:1:  [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 tok[MAX_TOK];
data/a56-1.3+dfsg/lex.c:71:20:  [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).
		yylval.n.val.i = atoi(tok);
data/a56-1.3+dfsg/lex.c:437:1:  [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 line_buf[INLINE];
data/a56-1.3+dfsg/main.c:255:9:  [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 list[MAX], *lp;
data/a56-1.3+dfsg/main.c:261:3:  [2] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf. Risk is low because the source has a constant maximum length.
		sprintf(list, "%06X<", word);
data/a56-1.3+dfsg/main.c:270:3:  [2] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf. Risk is low because the source has a constant maximum length.
		sprintf(list, "%06X", word);
data/a56-1.3+dfsg/main.c:275:1:  [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 *spacespace[2] = {
data/a56-1.3+dfsg/main.c:294:1:  [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 fixbuf[1024];
data/a56-1.3+dfsg/subs.c:40:17:  [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).
	else if ((fp = fopen(file, "r")) == NULL) {
data/a56-1.3+dfsg/subs.c:51:12:  [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(file, "w")) == NULL) {
data/a56-1.3+dfsg/subs.c:62:12:  [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(file, "a")) == NULL) {
data/a56-1.3+dfsg/subs.c:79:1:  [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 tabbuf[MAX_BUF], *untabn();
data/a56-1.3+dfsg/toomf.c:40:2:  [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[MAX];
data/a56-1.3+dfsg/torom.c:37:2:  [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[MAX];
data/a56-1.3+dfsg/a56.h:90:33:  [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 *)strcpy((char *)malloc(strlen(s)+1),(s)) : NULL)
data/a56-1.3+dfsg/a56.h:93:24:  [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).
#define rmcr(s) {if (s[strlen(s)-1] == '\n') s[strlen(s)-1] = '\0';};
data/a56-1.3+dfsg/a56.h:93:48:  [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).
#define rmcr(s) {if (s[strlen(s)-1] == '\n') s[strlen(s)-1] = '\0';};
data/a56-1.3+dfsg/debian/bin2h.c:34:7:  [1] (buffer) getchar:
  Check buffer boundaries if used in a loop including recursive loops
  (CWE-120, CWE-20).
  b = getchar ();
data/a56-1.3+dfsg/debian/bin2h.c:44:11:  [1] (buffer) getchar:
  Check buffer boundaries if used in a loop including recursive loops
  (CWE-120, CWE-20).
      b = getchar ();
data/a56-1.3+dfsg/debian/bin2h.c:52:8:  [1] (buffer) getchar:
  Check buffer boundaries if used in a loop including recursive loops
  (CWE-120, CWE-20).
	  b = getchar ();
data/a56-1.3+dfsg/keybld.c:153:3:  [1] (buffer) strncpy:
  Easily used incorrectly; doesn't always \0-terminate or check for invalid
  pointers [MS-banned] (CWE-120).
		strncpy(tmp, buf, tp - buf);
data/a56-1.3+dfsg/subs.c:96:2:  [1] (buffer) strncpy:
  Easily used incorrectly; doesn't always \0-terminate or check for invalid
  pointers [MS-banned] (CWE-120).
	strncpy(b, s, MAX_BUF);

ANALYSIS SUMMARY:

Hits = 37
Lines analyzed = 2081 in approximately 0.06 seconds (35212 lines/second)
Physical Source Lines of Code (SLOC) = 1545
Hits@level = [0]  54 [1]   8 [2]  19 [3]   3 [4]   4 [5]   3
Hits@level+ = [0+]  91 [1+]  37 [2+]  29 [3+]  10 [4+]   7 [5+]   3
Hits/KSLOC@level+ = [0+] 58.8997 [1+] 23.9482 [2+] 18.7702 [3+] 6.47249 [4+] 4.53074 [5+] 1.94175
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.