DeforaNetworks/zzuf
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Fix a possible crash in the getopt_long reimplementation.

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This commit is contained in:
Sam Hocevar
2016-09-20 08:57:14 +02:00
parent 6ca3b49e69
commit 192812ef51
1 changed files with 17 additions and 5 deletions
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src/util/getopt.c
+17 -5
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@@ -1,7 +1,7 @@
/*
* zzuf - general purpose fuzzer
*
* Copyright © 2002—2015 Sam Hocevar <sam@hocevar.net>
* Copyright © 2002—2016 Sam Hocevar <sam@hocevar.net>
*
* This program is free software. It comes without any warranty, to
* the extent permitted by applicable law. You can redistribute it
@@ -19,7 +19,7 @@
#include <stdio.h>
#include <string.h>
#if defined HAVE_GETOPT_H && defined HAVE_GETOPT_LONG
#if HAVE_GETOPT_H && HAVE_GETOPT_LONG
# include <getopt.h>
#endif
#include <stdint.h>
@@ -32,7 +32,7 @@ char *zz_optarg = NULL;
int zz_getopt(int argc, char * const _argv[], char const *optstring,
zzuf_option_t const *longopts, int *longindex)
{
#if defined HAVE_GETOPT_LONG
#if HAVE_GETOPT_LONG
optind = zz_optind;
optarg = zz_optarg;
int ret = getopt_long(argc, _argv, optstring,
@@ -68,8 +68,10 @@ int zz_getopt(int argc, char * const _argv[], char const *optstring,
{
if (flag[2] != '\0')
zz_optarg = flag + 2;
else
else if (zz_optind < argc)
zz_optarg = argv[zz_optind++];
else
goto too_few;
return ret;
}
@@ -110,7 +112,12 @@ int zz_getopt(int argc, char * const _argv[], char const *optstring,
*longindex = i;
zz_optind++;
if (longopts[i].has_arg)
zz_optarg = argv[zz_optind++];
{
if (zz_optind < argc)
zz_optarg = argv[zz_optind++];
else
goto too_few;
}
return longopts[i].val;
default:
break;
@@ -119,6 +126,11 @@ int zz_getopt(int argc, char * const _argv[], char const *optstring,
bad_opt:
fprintf(stderr, "%s: unrecognized option `%s'\n", argv[0], flag);
return '?';
too_few:
fprintf(stderr, "%s: option `%s' requires an argument\n",
argv[0], flag);
return '?';
}
return -1;