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/ruby-grib-0.4.0/ext/grib.c

FINAL RESULTS:

data/ruby-grib-0.4.0/ext/grib.c:238:3:  [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(var_new->gtype, gtype);
data/ruby-grib-0.4.0/ext/grib.c:246:3:  [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(var_new->vname, vname);
data/ruby-grib-0.4.0/ext/grib.c:252:5:  [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(var_new->ltype, vname);
data/ruby-grib-0.4.0/ext/grib.c:263:7:  [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(var_new->ltype, vname);
data/ruby-grib-0.4.0/ext/grib.c:404:3:  [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(gfile->fname, fname);
data/ruby-grib-0.4.0/ext/grib.c:433:3:  [4] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf.
		sprintf(buf, "%s_level%ld", var->vname, var->ltype_id);
data/ruby-grib-0.4.0/ext/grib.c:435:3:  [4] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf.
		sprintf(buf, "%s_%s", var->vname, var->ltype);
data/ruby-grib-0.4.0/ext/grib.c:436:8:  [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(var->vname, buf);
data/ruby-grib-0.4.0/ext/grib.c:442:8:  [4] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf.
	      sprintf(buf, "%s_level%ld", var2->vname, var2->ltype_id);
data/ruby-grib-0.4.0/ext/grib.c:444:8:  [4] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf.
	      sprintf(buf, "%s_%s", var2->vname, var2->ltype);
data/ruby-grib-0.4.0/ext/grib.c:445:6:  [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(var2->vname, buf);
data/ruby-grib-0.4.0/ext/grib.c:449:6:  [4] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf.
	    sprintf(buf, "%s_%s", var->vname, var->gtype);
data/ruby-grib-0.4.0/ext/grib.c:450:6:  [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(var->vname, buf);
data/ruby-grib-0.4.0/ext/grib.c:453:4:  [4] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf.
	  sprintf(buf, "%s_%s", var2->vname, var2->gtype);
data/ruby-grib-0.4.0/ext/grib.c:454:4:  [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(var2->vname, buf);
data/ruby-grib-0.4.0/ext/grib.c:457:6:  [4] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf.
	    sprintf(buf, "%s_%d", var->vname, i);
data/ruby-grib-0.4.0/ext/grib.c:458:6:  [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(var->vname, buf);
data/ruby-grib-0.4.0/ext/grib.c:461:4:  [4] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf.
	  sprintf(buf, "%s_%d", var2->vname, i);
data/ruby-grib-0.4.0/ext/grib.c:462:4:  [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(var2->vname, buf);
data/ruby-grib-0.4.0/ext/grib.c:163:3:  [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 vname[MAX_VALUE_LENGTH];
data/ruby-grib-0.4.0/ext/grib.c:181:3:  [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 gtype[MAX_VALUE_LENGTH];
data/ruby-grib-0.4.0/ext/grib.c:244:5:  [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(vname, "id%ld", pnum);
data/ruby-grib-0.4.0/ext/grib.c:396:16:  [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).
  FILE *file = fopen(fname, mode);
data/ruby-grib-0.4.0/ext/grib.c:418:3:  [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 buf[MAX_VALUE_LENGTH];
data/ruby-grib-0.4.0/ext/grib.c:651:7:  [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 value[MAX_VALUE_LENGTH];
data/ruby-grib-0.4.0/ext/grib.c:662:16:  [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.
      unsigned char value[MAX_VALUE_LENGTH];
data/ruby-grib-0.4.0/ext/grib.c:674:4:  [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 value[MAX_VALUE_LENGTH];
data/ruby-grib-0.4.0/ext/grib.c:679:10:  [2] (integer) atol:
  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).
	    if (atol(value) == l)
data/ruby-grib-0.4.0/ext/grib.c:256:21:  [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).
    for (i=1,j=1; i<strlen(vname); i++) {
data/ruby-grib-0.4.0/ext/grib.c:403:32:  [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).
  gfile->fname = ALLOC_N(char, strlen(fname)+1);

ANALYSIS SUMMARY:

Hits = 30
Lines analyzed = 819 in approximately 0.04 seconds (19624 lines/second)
Physical Source Lines of Code (SLOC) = 708
Hits@level = [0]   0 [1]   2 [2]   9 [3]   0 [4]  19 [5]   0
Hits@level+ = [0+]  30 [1+]  30 [2+]  28 [3+]  19 [4+]  19 [5+]   0
Hits/KSLOC@level+ = [0+] 42.3729 [1+] 42.3729 [2+] 39.548 [3+] 26.8362 [4+] 26.8362 [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.