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/tcl-signal-1.4.4/signal_ext.c

FINAL RESULTS:

data/tcl-signal-1.4.4/signal_ext.c:328:5:  [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).
    strcpy(signal_handlers[sig].signal_proc, procname);
data/tcl-signal-1.4.4/signal_ext.c:592:12:  [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).
    return atoi(arg);
data/tcl-signal-1.4.4/signal_ext.c:599:10:  [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 tmp_sig_name[10]; /* 7 + 2 + 1 */
data/tcl-signal-1.4.4/signal_ext.c:605:3:  [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(tmp_sig_name, "Signal %d", i);
data/tcl-signal-1.4.4/signal_ext.c:233:18:  [1] (buffer) read:
  Check buffer boundaries if used in a loop including recursive loops
  (CWE-120, CWE-20).
  if ( (result = read(fds[0], &sig, sizeof(sig))) <= 0 )
data/tcl-signal-1.4.4/signal_ext.c:327:59:  [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 ((signal_handlers[sig].signal_proc = (char *)ckalloc(strlen(procname)+1)))

ANALYSIS SUMMARY:

Hits = 6
Lines analyzed = 608 in approximately 0.03 seconds (23888 lines/second)
Physical Source Lines of Code (SLOC) = 448
Hits@level = [0]   3 [1]   2 [2]   3 [3]   0 [4]   1 [5]   0
Hits@level+ = [0+]   9 [1+]   6 [2+]   4 [3+]   1 [4+]   1 [5+]   0
Hits/KSLOC@level+ = [0+] 20.0893 [1+] 13.3929 [2+] 8.92857 [3+] 2.23214 [4+] 2.23214 [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.