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/disk-filltest-0.8.2/disk-filltest.c

FINAL RESULTS:

data/disk-filltest-0.8.2/disk-filltest.c:191:19:  [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 ((opt = getopt(argc, argv, "hs:S:f:ruUC:NR:V")) != -1) {
data/disk-filltest-0.8.2/disk-filltest.c:126:36:  [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.
void format_time(unsigned int sec, char output[64])
data/disk-filltest-0.8.2/disk-filltest.c:136:9:  [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(output, "%ud%uh%um%us", days, hours, minutes, sec);
data/disk-filltest-0.8.2/disk-filltest.c:143:9:  [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(output, "%uh%um%us", hours, minutes, sec);
data/disk-filltest-0.8.2/disk-filltest.c:148:9:  [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(output, "%um%us", minutes, sec);
data/disk-filltest-0.8.2/disk-filltest.c:151:9:  [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(output, "%us", sec);
data/disk-filltest-0.8.2/disk-filltest.c:194:22:  [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).
            g_seed = atoi(optarg);
data/disk-filltest-0.8.2/disk-filltest.c:197:30:  [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).
            gopt_file_size = atoi(optarg);
data/disk-filltest-0.8.2/disk-filltest.c:200:31:  [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).
            gopt_file_limit = atoi(optarg);
data/disk-filltest-0.8.2/disk-filltest.c:221:27:  [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).
            gopt_repeat = atoi(optarg);
data/disk-filltest-0.8.2/disk-filltest.c:246:9:  [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.
        char filename[32];
data/disk-filltest-0.8.2/disk-filltest.c:247:9:  [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(filename, "random-%08u", filenum);
data/disk-filltest-0.8.2/disk-filltest.c:293:9:  [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.
        char filename[32], eta[64];
data/disk-filltest-0.8.2/disk-filltest.c:303:9:  [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(filename, "random-%08u", filenum);
data/disk-filltest-0.8.2/disk-filltest.c:305:14:  [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(filename, O_RDWR | O_CREAT | O_TRUNC | O_BINARY, 0600);
data/disk-filltest-0.8.2/disk-filltest.c:390:9:  [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.
        char filename[32];
data/disk-filltest-0.8.2/disk-filltest.c:395:13:  [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(filename, "random-%08u", expected_file_limit);
data/disk-filltest-0.8.2/disk-filltest.c:396:18:  [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(filename, O_RDONLY | O_BINARY);
data/disk-filltest-0.8.2/disk-filltest.c:408:9:  [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.
        char filename[32], eta[64];
data/disk-filltest-0.8.2/disk-filltest.c:418:9:  [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(filename, "random-%08u", filenum);
data/disk-filltest-0.8.2/disk-filltest.c:437:18:  [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(filename, O_RDONLY | O_BINARY);
data/disk-filltest-0.8.2/disk-filltest.c:458:18:  [1] (buffer) read:
  Check buffer boundaries if used in a loop including recursive loops
  (CWE-120, CWE-20).
            rb = read(fd, block, read_size);

ANALYSIS SUMMARY:

Hits = 22
Lines analyzed = 545 in approximately 0.06 seconds (9196 lines/second)
Physical Source Lines of Code (SLOC) = 404
Hits@level = [0]  22 [1]   1 [2]  20 [3]   1 [4]   0 [5]   0
Hits@level+ = [0+]  44 [1+]  22 [2+]  21 [3+]   1 [4+]   0 [5+]   0
Hits/KSLOC@level+ = [0+] 108.911 [1+] 54.4554 [2+] 51.9802 [3+] 2.47525 [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.