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/screen-message-0.25/gtkzoom.h
Examining data/screen-message-0.25/sm.c
Examining data/screen-message-0.25/gtkzoom.c

FINAL RESULTS:

data/screen-message-0.25/sm.c:296:14:  [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 ((c = getopt_long (argc, argv, "hVf:b:n:r:a:i", long_options, (int *) 0)) != EOF) {
data/screen-message-0.25/sm.c:320:16:  [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).
				rotation = atoi(optarg);
data/screen-message-0.25/sm.c:323:17:  [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).
				alignment = atoi(optarg);
data/screen-message-0.25/sm.c:110:6:  [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 (strlen(text) > 0) {
data/screen-message-0.25/sm.c:194:8:  [1] (buffer) read:
  Check buffer boundaries if used in a loop including recursive loops
  (CWE-120, CWE-20).
	gsize read;
data/screen-message-0.25/sm.c:197:66:  [1] (buffer) read:
  Check buffer boundaries if used in a loop including recursive loops
  (CWE-120, CWE-20).
	while ((stat = g_io_channel_read_chars(chan, buf, sizeof(buf), &read, &err)) == G_IO_STATUS_NORMAL && err == NULL) {
data/screen-message-0.25/sm.c:198:43:  [1] (buffer) read:
  Check buffer boundaries if used in a loop including recursive loops
  (CWE-120, CWE-20).
		g_string_append_len(partial_input, buf, read);

ANALYSIS SUMMARY:

Hits = 7
Lines analyzed = 627 in approximately 0.04 seconds (14793 lines/second)
Physical Source Lines of Code (SLOC) = 489
Hits@level = [0]   4 [1]   4 [2]   2 [3]   1 [4]   0 [5]   0
Hits@level+ = [0+]  11 [1+]   7 [2+]   3 [3+]   1 [4+]   0 [5+]   0
Hits/KSLOC@level+ = [0+] 22.4949 [1+] 14.3149 [2+] 6.13497 [3+] 2.04499 [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.