Use C99 format macro constants for timestamp and vlan_tag

Since timestamp and vlan_tag in the shm_log_entry struct are C99 fixed
width integer types (uint64_t and uint16_t), the cross-platform way to
print these values is to use the corresponding format macro
constants[1], PRIu64 and PRIu16.

This also adjusts the places where the time_t timestamp value is
printed, casting it to uint64_t, for consistency.

Fixes #25
Fixes #26

[1]: https://en.cppreference.com/w/c/types/integer#Format_macro_constants

src/addrwatch_stdout.c

@@ -16,7 +16,7 @@ void process_entry(struct shm_log_entry *e, void *arg)
 		ip4_ntoa(e->ip_address, ip_str);
 	}
 
-	printf("%lu %s %u %s %s %s\n", e->timestamp, e->interface, e->vlan_tag,
+	printf("%" PRIu64 " %s %" PRIu16 " %s %s %s\n", e->timestamp, e->interface, e->vlan_tag,
 		mac_str, ip_str, pkt_origin_str[e->origin]);
 }
 

src/addrwatch_syslog.c

@@ -18,7 +18,7 @@ void process_entry(struct shm_log_entry *e, void *arg)
 		ip4_ntoa(e->ip_address, ip_str);
 	}
 
-	syslog(LOG_INFO, "%lu %s %u %s %s %s", e->timestamp, e->interface,
+	syslog(LOG_INFO, "%" PRIu64 " %s %" PRIu16 " %s %s %s", e->timestamp, e->interface,
 		e->vlan_tag, mac_str, ip_str, pkt_origin_str[e->origin]);
 }
 

src/output_flatfile.c

@@ -22,8 +22,8 @@ void output_flatfile_reload()
 void output_flatfile_save(struct pkt *p, char *mac_str, char *ip_str)
 {
 	if (cfg.data_fd) {
-		fprintf(cfg.data_fd, "%lu %s %u %s %s %s\n",
-			p->pcap_header->ts.tv_sec, p->ifc->name, p->vlan_tag,
+		fprintf(cfg.data_fd, "%" PRIu64 " %s %" PRIu16 " %s %s %s\n",
+			(uint64_t)p->pcap_header->ts.tv_sec, p->ifc->name, p->vlan_tag,
 			mac_str, ip_str, pkt_origin_str[p->origin]);
 		fflush(cfg.data_fd);
 	}

src/storage.c

@@ -129,7 +129,7 @@ void save_pairing(struct pkt *p)
 
 	output_shm_save(p, mac_str, ip_str);
 	if (!cfg.quiet) {
-		printf("%lu %s %u %s %s %s\n", tstamp, p->ifc->name,
+		printf("%" PRIu64 " %s %" PRIu16 " %s %s %s\n", (uint64_t)tstamp, p->ifc->name,
 			p->vlan_tag, mac_str, ip_str, pkt_origin_str[p->origin]);
 		fflush(stdout);
 	}