Avoid using a global variable when it's not needed

diff --git a/tcpdump.c b/tcpdump.c
index acf62c8a7846e8571cf96346db300bb606b20f5b..b76b426d691be1ceaf12862316a26772c9ba67ab 100644 (file)
--- a/tcpdump.c
+++ b/tcpdump.c
@@ -188,7 +188,7 @@ static RETSIGTYPE child_cleanup(int);
 static void print_version(void);
 static void print_usage(void);
 static void show_tstamp_types_and_exit(pcap_t *, const char *device) __attribute__((noreturn));
-static void show_dlts_and_exit(const char *device) __attribute__((noreturn));
+static void show_dlts_and_exit(pcap_t *, const char *device) __attribute__((noreturn));
 #ifdef HAVE_PCAP_FINDALLDEVS
 static void show_devices_and_exit (void) __attribute__((noreturn));
 #endif
@@ -373,15 +373,15 @@ show_tstamp_types_and_exit(pcap_t *pc, const char *device)
 #endif
 
 static void
-show_dlts_and_exit(const char *device)
+show_dlts_and_exit(pcap_t *pc, const char *device)
 {
        int n_dlts, i;
        int *dlts = 0;
        const char *dlt_name;
 
-       n_dlts = pcap_list_datalinks(pd, &dlts);
+       n_dlts = pcap_list_datalinks(pc, &dlts);
        if (n_dlts < 0)
-               error("%s", pcap_geterr(pd));
+               error("%s", pcap_geterr(pc));
        else if (n_dlts == 0 || !dlts)
                error("No data link types.");
 
@@ -1729,7 +1729,7 @@ main(int argc, char **argv)
                        }
 #endif /* !defined(HAVE_PCAP_CREATE) && defined(_WIN32) */
                if (Lflag)
-                       show_dlts_and_exit(device);
+                       show_dlts_and_exit(pd, device);
                if (yflag_dlt >= 0) {
 #ifdef HAVE_PCAP_SET_DATALINK
                        if (pcap_set_datalink(pd, yflag_dlt) < 0)