X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/fc213645d4399c986f1ce3d55e113828e73ee49d..f991a6948dbffc495c7877c404be2d5d4903ea1e:/tcpdump.c

diff --git a/tcpdump.c b/tcpdump.c
index e62c2d69..5598ec28 100644
--- a/tcpdump.c
+++ b/tcpdump.c
@@ -864,7 +864,7 @@ main(int argc, char **argv)
 
 		case 'C':
 			Cflag = atoi(optarg) * 1000000;
-			if (Cflag < 0)
+			if (Cflag <= 0)
 				error("invalid file size %s", optarg);
 			break;
 
@@ -1115,8 +1115,8 @@ main(int argc, char **argv)
 				ndo->ndo_packettype = PT_PGM_ZMTP1;
 			else if (ascii_strcasecmp(optarg, "lmp") == 0)
 				ndo->ndo_packettype = PT_LMP;
-            else if (strcasecmp(optarg, "resp") == 0)
-                ndo->ndo_packettype = PT_RESP;
+			else if (ascii_strcasecmp(optarg, "resp") == 0)
+				ndo->ndo_packettype = PT_RESP;
 			else
 				error("unknown packet type `%s'", optarg);
 			break;
@@ -1145,7 +1145,7 @@ main(int argc, char **argv)
 
 		case 'W':
 			Wflag = atoi(optarg);
-			if (Wflag < 0)
+			if (Wflag <= 0)
 				error("invalid number of output files %s", optarg);
 			WflagChars = getWflagChars(Wflag);
 			break;
@@ -1849,7 +1849,6 @@ main(int argc, char **argv)
 					 */
 					dlt = new_dlt;
 					ndo->ndo_if_printer = get_if_printer(ndo, dlt);
-					dlt_name = pcap_datalink_val_to_name(dlt);
 					if (pcap_compile(pd, &fcode, cmdbuf, Oflag, netmask) < 0)
 						error("%s", pcap_geterr(pd));
 				}
@@ -1863,6 +1862,7 @@ main(int argc, char **argv)
 				/*
 				 * Report the new file.
 				 */
+				dlt_name = pcap_datalink_val_to_name(dlt);
 				if (dlt_name == NULL) {
 					fprintf(stderr, "reading from file %s, link-type %u\n",
 					    RFileName, dlt);
@@ -2388,7 +2388,7 @@ print_usage(void)
 #endif
 	(void)fprintf(stderr, "[ -T type ] [ --version ] [ -V file ]\n");
 	(void)fprintf(stderr,
-"\t\t[ -w file ] [ -W filecount ] [ -y datalinktype ] [ -z command ]\n");
+"\t\t[ -w file ] [ -W filecount ] [ -y datalinktype ] [ -z postrotate-command ]\n");
 	(void)fprintf(stderr,
 "\t\t[ -Z user ] [ expression ]\n");
 }