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/flog-1.8+orig/flog.c

FINAL RESULTS:

data/flog-1.8+orig/flog.c:88:17:  [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).
	conf.max_len = atoi (argv[opt]);
data/flog-1.8+orig/flog.c:120:19:  [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 ((pid_fd = fopen(conf.pidfile_name, "w")) == NULL) {
data/flog-1.8+orig/flog.c:131:20:  [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).
    if ((fifo_fd = open(fifo_name, O_RDONLY)) < 0) {
data/flog-1.8+orig/flog.c:161:22:  [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).
      if ((fifo_fd = open(fifo_name, O_RDONLY)) < 0) {
data/flog-1.8+orig/flog.c:194:6:  [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 str[256];
data/flog-1.8+orig/flog.c:213:4:  [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 str[256];
data/flog-1.8+orig/flog.c:256:10:  [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 (file->name, O_CREAT|O_APPEND|O_WRONLY|O_LARGEFILE, 0666);
data/flog-1.8+orig/flog.c:258:10:  [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 (file->name, O_CREAT|O_APPEND|O_WRONLY, 0666);
data/flog-1.8+orig/flog.c:316:3:  [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 str[256];
data/flog-1.8+orig/flog.c:333:10:  [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 buf[100];
data/flog-1.8+orig/flog.c:339:3:  [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 (prepend_to-len, buf, len);
data/flog-1.8+orig/flog.c:156:12:  [1] (buffer) read:
  Check buffer boundaries if used in a loop including recursive loops
  (CWE-120, CWE-20).
    size = read(fifo_fd, buf.data + buf.used, buf.size - buf.used);

ANALYSIS SUMMARY:

Hits = 12
Lines analyzed = 351 in approximately 0.05 seconds (6581 lines/second)
Physical Source Lines of Code (SLOC) = 275
Hits@level = [0]  14 [1]   1 [2]  11 [3]   0 [4]   0 [5]   0
Hits@level+ = [0+]  26 [1+]  12 [2+]  11 [3+]   0 [4+]   0 [5+]   0
Hits/KSLOC@level+ = [0+] 94.5455 [1+] 43.6364 [2+]  40 [3+]   0 [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.