diff --git a/plugins/check_dns.c b/plugins/check_dns.c
index 3462701a07f6ba9a4caf73b492042cfc69642683..c0ea298278049237e8f86fe9a4690851e2d86052 100644 (file)
--- a/plugins/check_dns.c
+++ b/plugins/check_dns.c
}
c = optind;
- if (query_address[0] == 0) {
- if (is_host (argv[c]) == FALSE) {
+ if (strlen(query_address)==0 && c<argc) {
+ if (is_host(argv[c])==FALSE) {
printf ("Invalid name/address: %s\n\n", argv[c]);
return ERROR;
}
- if (strlen (argv[c]) >= ADDRESS_LENGTH)
+ if (strlen(argv[c])>=ADDRESS_LENGTH)
terminate (STATE_UNKNOWN, "Input buffer overflow\n");
strcpy (query_address, argv[c++]);
}
- if (dns_server[0] == 0) {
- if (is_host (argv[c]) == FALSE) {
+ if (strlen(dns_server)==0 && c<argc) {
+ if (is_host(argv[c]) == FALSE) {
printf ("Invalid name/address: %s\n\n", argv[c]);
return ERROR;
}
- if (strlen (argv[c]) >= ADDRESS_LENGTH)
+ if (strlen(argv[c]) >= ADDRESS_LENGTH)
terminate (STATE_UNKNOWN, "Input buffer overflow\n");
strcpy (dns_server, argv[c++]);
}