Annotation of src/usr.bin/netstat/if.c, Revision 1.45
1.45 ! otto 1: /* $OpenBSD: if.c,v 1.44 2005/06/08 04:47:04 henning Exp $ */
1.6 deraadt 2: /* $NetBSD: if.c,v 1.16.4.2 1996/06/07 21:46:46 thorpej Exp $ */
1.1 deraadt 3:
4: /*
5: * Copyright (c) 1983, 1988, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
1.35 millert 16: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
32:
33: #ifndef lint
34: #if 0
35: static char sccsid[] = "from: @(#)if.c 8.2 (Berkeley) 2/21/94";
36: #else
1.45 ! otto 37: static char *rcsid = "$OpenBSD: if.c,v 1.44 2005/06/08 04:47:04 henning Exp $";
1.1 deraadt 38: #endif
39: #endif /* not lint */
40:
41: #include <sys/types.h>
42: #include <sys/protosw.h>
43: #include <sys/socket.h>
44:
45: #include <net/if.h>
46: #include <net/if_dl.h>
1.5 deraadt 47: #include <net/if_types.h>
1.1 deraadt 48: #include <netinet/in.h>
49: #include <netinet/in_var.h>
1.11 millert 50: #include <netinet/if_ether.h>
1.8 mickey 51: #include <netipx/ipx.h>
52: #include <netipx/ipx_if.h>
1.1 deraadt 53: #include <arpa/inet.h>
54:
1.13 millert 55: #include <limits.h>
1.1 deraadt 56: #include <signal.h>
57: #include <stdio.h>
1.36 david 58: #include <stdlib.h>
1.1 deraadt 59: #include <string.h>
60: #include <unistd.h>
61:
62: #include "netstat.h"
63:
64: #define YES 1
65: #define NO 0
66:
1.29 millert 67: static void sidewaysintpr(u_int, u_long);
68: static void catchalarm(int);
1.1 deraadt 69:
70: /*
71: * Print a description of the network interfaces.
1.3 deraadt 72: * NOTE: ifnetaddr is the location of the kernel global "ifnet",
73: * which is a TAILQ_HEAD.
1.1 deraadt 74: */
75: void
1.33 deraadt 76: intpr(int interval, u_long ifnetaddr)
1.1 deraadt 77: {
78: struct ifnet ifnet;
79: union {
80: struct ifaddr ifa;
81: struct in_ifaddr in;
1.18 itojun 82: #ifdef INET6
83: struct in6_ifaddr in6;
84: #endif
1.8 mickey 85: struct ipx_ifaddr ipx;
1.1 deraadt 86: } ifaddr;
1.33 deraadt 87: u_long total, ifaddraddr;
1.1 deraadt 88: struct sockaddr *sa;
1.3 deraadt 89: struct ifnet_head ifhead; /* TAILQ_HEAD */
90: char name[IFNAMSIZ];
1.1 deraadt 91:
92: if (ifnetaddr == 0) {
93: printf("ifnet: symbol not defined\n");
94: return;
95: }
96: if (interval) {
97: sidewaysintpr((unsigned)interval, ifnetaddr);
98: return;
99: }
1.3 deraadt 100:
101: /*
102: * Find the pointer to the first ifnet structure. Replace
103: * the pointer to the TAILQ_HEAD with the actual pointer
104: * to the first list element.
105: */
1.43 jaredy 106: if (kread(ifnetaddr, &ifhead, sizeof ifhead))
1.1 deraadt 107: return;
1.45 ! otto 108: ifnetaddr = (u_long)TAILQ_FIRST(&ifhead);
1.3 deraadt 109:
1.22 camield 110: printf("%-7.7s %-5.5s %-11.11s %-17.17s ",
1.33 deraadt 111: "Name", "Mtu", "Network", "Address");
1.22 camield 112: if (bflag)
113: printf("%10.10s %10.10s", "Ibytes", "Obytes");
114: else
115: printf("%8.8s %5.5s %8.8s %5.5s %5.5s",
116: "Ipkts", "Ierrs", "Opkts", "Oerrs", "Colls");
1.1 deraadt 117: if (tflag)
118: printf(" %s", "Time");
119: if (dflag)
120: printf(" %s", "Drop");
121: putchar('\n');
122: ifaddraddr = 0;
123: while (ifnetaddr || ifaddraddr) {
124: struct sockaddr_in *sin;
1.18 itojun 125: #ifdef INET6
126: struct sockaddr_in6 *sin6;
127: #endif
1.27 mpech 128: char *cp;
1.1 deraadt 129: int n, m;
130:
131: if (ifaddraddr == 0) {
1.43 jaredy 132: if (kread(ifnetaddr, &ifnet, sizeof ifnet))
1.1 deraadt 133: return;
1.3 deraadt 134: bcopy(ifnet.if_xname, name, IFNAMSIZ);
135: name[IFNAMSIZ - 1] = '\0'; /* sanity */
1.45 ! otto 136: ifnetaddr = (u_long)TAILQ_NEXT(&ifnet, if_list);
1.3 deraadt 137: if (interface != 0 && strcmp(name, interface) != 0)
1.1 deraadt 138: continue;
1.10 millert 139: cp = strchr(name, '\0');
1.1 deraadt 140: if ((ifnet.if_flags & IFF_UP) == 0)
141: *cp++ = '*';
142: *cp = '\0';
1.45 ! otto 143: ifaddraddr = (u_long)TAILQ_FIRST(&ifnet.if_addrlist);
1.1 deraadt 144: }
1.25 brian 145:
146: if (qflag) {
147: total = ifnet.if_ibytes + ifnet.if_obytes +
148: ifnet.if_ipackets + ifnet.if_ierrors +
149: ifnet.if_opackets + ifnet.if_oerrors +
150: ifnet.if_collisions;
151: if (tflag)
152: total += ifnet.if_timer;
153: if (dflag)
154: total += ifnet.if_snd.ifq_drops;
155: if (total == 0) {
156: ifaddraddr = 0;
157: continue;
158: }
159: }
160:
1.16 mickey 161: printf("%-7.7s %-5ld ", name, ifnet.if_mtu);
1.1 deraadt 162: if (ifaddraddr == 0) {
163: printf("%-11.11s ", "none");
1.37 deraadt 164: printf("%-17.17s ", "none");
1.1 deraadt 165: } else {
1.43 jaredy 166: if (kread(ifaddraddr, &ifaddr, sizeof ifaddr)) {
1.1 deraadt 167: ifaddraddr = 0;
168: continue;
169: }
170: #define CP(x) ((char *)(x))
171: cp = (CP(ifaddr.ifa.ifa_addr) - CP(ifaddraddr)) +
172: CP(&ifaddr); sa = (struct sockaddr *)cp;
173: switch (sa->sa_family) {
174: case AF_UNSPEC:
175: printf("%-11.11s ", "none");
176: printf("%-17.17s ", "none");
177: break;
178: case AF_INET:
179: sin = (struct sockaddr_in *)sa;
180: #ifdef notdef
181: /* can't use inet_makeaddr because kernel
182: * keeps nets unshifted.
183: */
184: in = inet_makeaddr(ifaddr.in.ia_subnet,
1.30 deraadt 185: INADDR_ANY);
1.20 itojun 186: cp = netname(in.s_addr,
1.30 deraadt 187: ifaddr.in.ia_subnetmask);
1.1 deraadt 188: #else
1.20 itojun 189: cp = netname(ifaddr.in.ia_subnet,
190: ifaddr.in.ia_subnetmask);
1.1 deraadt 191: #endif
1.20 itojun 192: if (vflag)
193: n = strlen(cp) < 11 ? 11 : strlen(cp);
194: else
195: n = 11;
196: printf("%-*.*s ", n, n, cp);
197: cp = routename(sin->sin_addr.s_addr);
198: if (vflag)
199: n = strlen(cp) < 17 ? 17 : strlen(cp);
200: else
201: n = 17;
202: printf("%-*.*s ", n, n, cp);
1.1 deraadt 203:
204: if (aflag) {
205: u_long multiaddr;
206: struct in_multi inm;
1.28 mickey 207:
1.45 ! otto 208: multiaddr = (u_long)LIST_FIRST(&ifaddr.in.ia_multiaddrs);
1.1 deraadt 209: while (multiaddr != 0) {
1.43 jaredy 210: kread(multiaddr, &inm, sizeof inm);
1.19 itojun 211: printf("\n%25s %-17.17s ", "",
1.1 deraadt 212: routename(inm.inm_addr.s_addr));
1.45 ! otto 213: multiaddr = (u_long)LIST_NEXT(&inm, inm_list);
1.1 deraadt 214: }
1.8 mickey 215: }
216: break;
1.18 itojun 217: #ifdef INET6
218: case AF_INET6:
219: sin6 = (struct sockaddr_in6 *)sa;
1.34 itojun 220: #ifdef __KAME__
1.20 itojun 221: if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
222: sin6->sin6_scope_id =
1.30 deraadt 223: ntohs(*(u_int16_t *)
1.38 deraadt 224: &sin6->sin6_addr.s6_addr[2]);
1.20 itojun 225: sin6->sin6_addr.s6_addr[2] = 0;
226: sin6->sin6_addr.s6_addr[3] = 0;
227: }
228: #endif
229: cp = netname6(&ifaddr.in6.ia_addr,
1.30 deraadt 230: &ifaddr.in6.ia_prefixmask.sin6_addr);
1.20 itojun 231: if (vflag)
232: n = strlen(cp) < 11 ? 11 : strlen(cp);
233: else
234: n = 11;
235: printf("%-*.*s ", n, n, cp);
236: cp = routename6(sin6);
237: if (vflag)
238: n = strlen(cp) < 17 ? 17 : strlen(cp);
239: else
240: n = 17;
241: printf("%-*.*s ", n, n, cp);
1.19 itojun 242: if (aflag) {
243: u_long multiaddr;
244: struct in6_multi inm;
1.31 itojun 245: struct sockaddr_in6 m6;
1.28 mickey 246:
1.45 ! otto 247: multiaddr = (u_long)LIST_FIRST(&ifaddr.in6.ia6_multiaddrs);
1.19 itojun 248: while (multiaddr != 0) {
1.43 jaredy 249: kread(multiaddr, &inm, sizeof inm);
1.31 itojun 250: memset(&m6, 0, sizeof(m6));
251: m6.sin6_len = sizeof(struct sockaddr_in6);
252: m6.sin6_family = AF_INET6;
253: m6.sin6_addr = inm.in6m_addr;
1.34 itojun 254: #ifdef __KAME__
1.32 itojun 255: if (IN6_IS_ADDR_MC_LINKLOCAL(&m6.sin6_addr)) {
1.31 itojun 256: m6.sin6_scope_id =
257: ntohs(*(u_int16_t *)
1.38 deraadt 258: &m6.sin6_addr.s6_addr[2]);
1.31 itojun 259: m6.sin6_addr.s6_addr[2] = 0;
260: m6.sin6_addr.s6_addr[3] = 0;
261: }
262: #endif
263: cp = routename6(&m6);
1.19 itojun 264: if (vflag)
1.31 itojun 265: n = strlen(cp) < 17 ? 17 : strlen(cp);
1.19 itojun 266: else
267: n = 17;
268: printf("\n%25s %-*.*s ", "",
1.31 itojun 269: n, n, cp);
1.45 ! otto 270: multiaddr = (u_long)LIST_NEXT(&inm, in6m_entry);
1.19 itojun 271: }
272: }
1.18 itojun 273: break;
274: #endif
1.8 mickey 275: case AF_IPX:
276: {
277: struct sockaddr_ipx *sipx =
278: (struct sockaddr_ipx *)sa;
279: u_long net;
280: char netnum[8];
281:
1.17 deraadt 282: *(union ipx_net *)&net = sipx->sipx_addr.ipx_net;
283: snprintf(netnum, sizeof netnum, "%xH",
284: ntohl(net));
1.8 mickey 285: upHex(netnum);
286: printf("ipx:%-8s", netnum);
287: printf("%-17s ",
288: ipx_phost((struct sockaddr *)sipx));
1.1 deraadt 289: }
1.15 denny 290: break;
291: case AF_APPLETALK:
292: printf("atlk:%-12s",atalk_print(sa,0x10) );
293: printf("%-12s ",atalk_print(sa,0x0b) );
1.1 deraadt 294: break;
295: case AF_LINK:
296: {
297: struct sockaddr_dl *sdl =
298: (struct sockaddr_dl *)sa;
1.5 deraadt 299: m = printf("%-11.11s ", "<Link>");
300: if (sdl->sdl_type == IFT_ETHER ||
1.42 mpf 301: sdl->sdl_type == IFT_CARP ||
1.23 fgsch 302: sdl->sdl_type == IFT_FDDI ||
303: sdl->sdl_type == IFT_ISO88025)
1.5 deraadt 304: printf("%-17.17s ",
1.11 millert 305: ether_ntoa((struct ether_addr *)LLADDR(sdl)));
1.5 deraadt 306: else {
307: cp = (char *)LLADDR(sdl);
308: n = sdl->sdl_alen;
309: goto hexprint;
310: }
1.1 deraadt 311: }
1.5 deraadt 312: break;
1.1 deraadt 313: default:
314: m = printf("(%d)", sa->sa_family);
315: for (cp = sa->sa_len + (char *)sa;
316: --cp > sa->sa_data && (*cp == 0);) {}
317: n = cp - sa->sa_data + 1;
318: cp = sa->sa_data;
319: hexprint:
320: while (--n >= 0)
321: m += printf("%x%c", *cp++ & 0xff,
322: n > 0 ? '.' : ' ');
323: m = 30 - m;
324: while (m-- > 0)
325: putchar(' ');
326: break;
327: }
1.45 ! otto 328: ifaddraddr = (u_long)TAILQ_NEXT(&ifaddr.ifa, ifa_list);
1.1 deraadt 329: }
1.22 camield 330: if (bflag)
331: printf("%10lu %10lu",
332: ifnet.if_ibytes, ifnet.if_obytes);
333: else
334: printf("%8lu %5lu %8lu %5lu %5lu",
335: ifnet.if_ipackets, ifnet.if_ierrors,
336: ifnet.if_opackets, ifnet.if_oerrors,
337: ifnet.if_collisions);
1.1 deraadt 338: if (tflag)
1.22 camield 339: printf(" %4d", ifnet.if_timer);
1.1 deraadt 340: if (dflag)
1.22 camield 341: printf(" %4d", ifnet.if_snd.ifq_drops);
1.1 deraadt 342: putchar('\n');
343: }
344: }
345:
1.4 deraadt 346: #define MAXIF 100
1.1 deraadt 347: struct iftot {
1.3 deraadt 348: char ift_name[IFNAMSIZ]; /* interface name */
1.40 dhartmei 349: u_long ift_ip; /* input packets */
350: u_long ift_ib; /* input bytes */
351: u_long ift_ie; /* input errors */
352: u_long ift_op; /* output packets */
353: u_long ift_ob; /* output bytes */
354: u_long ift_oe; /* output errors */
355: u_long ift_co; /* collisions */
356: u_long ift_dr; /* drops */
1.1 deraadt 357: } iftot[MAXIF];
358:
1.26 millert 359: volatile sig_atomic_t signalled; /* set if alarm goes off "early" */
1.1 deraadt 360:
361: /*
362: * Print a running summary of interface statistics.
363: * Repeat display every interval seconds, showing statistics
364: * collected over that interval. Assumes that interval is non-zero.
365: * First line printed at top of screen is always cumulative.
366: */
367: static void
1.33 deraadt 368: sidewaysintpr(unsigned int interval, u_long off)
1.1 deraadt 369: {
370: struct ifnet ifnet;
371: u_long firstifnet;
1.27 mpech 372: struct iftot *ip, *total;
373: int line;
1.1 deraadt 374: struct iftot *lastif, *sum, *interesting;
1.3 deraadt 375: struct ifnet_head ifhead; /* TAILQ_HEAD */
1.26 millert 376: sigset_t emptyset;
1.1 deraadt 377:
1.3 deraadt 378: /*
379: * Find the pointer to the first ifnet structure. Replace
380: * the pointer to the TAILQ_HEAD with the actual pointer
381: * to the first list element.
382: */
1.43 jaredy 383: if (kread(off, &ifhead, sizeof ifhead))
1.1 deraadt 384: return;
1.45 ! otto 385: firstifnet = (u_long)TAILQ_FIRST(&ifhead);
1.3 deraadt 386:
1.1 deraadt 387: lastif = iftot;
388: sum = iftot + MAXIF - 1;
389: total = sum - 1;
1.4 deraadt 390: interesting = (interface == NULL) ? iftot : NULL;
1.1 deraadt 391: for (off = firstifnet, ip = iftot; off;) {
1.43 jaredy 392: if (kread(off, &ifnet, sizeof ifnet))
1.1 deraadt 393: break;
1.6 deraadt 394: bzero(ip->ift_name, sizeof(ip->ift_name));
1.22 camield 395: snprintf(ip->ift_name, IFNAMSIZ, "%s", ifnet.if_xname);
1.6 deraadt 396: if (interface && strcmp(ifnet.if_xname, interface) == 0)
1.1 deraadt 397: interesting = ip;
398: ip++;
399: if (ip >= iftot + MAXIF - 2)
400: break;
1.45 ! otto 401: off = (u_long)TAILQ_NEXT(&ifnet, if_list);
1.4 deraadt 402: }
403: if (interesting == NULL) {
404: fprintf(stderr, "%s: %s: unknown interface\n",
405: __progname, interface);
406: exit(1);
1.1 deraadt 407: }
408: lastif = ip;
409:
410: (void)signal(SIGALRM, catchalarm);
411: signalled = NO;
412: (void)alarm(interval);
413: banner:
1.22 camield 414: if (bflag)
415: printf("%7.7s in %8.8s %6.6s out %5.5s",
416: interesting->ift_name, " ",
417: interesting->ift_name, " ");
418: else
419: printf("%5.5s in %5.5s%5.5s out %5.5s %5.5s",
420: interesting->ift_name, " ",
421: interesting->ift_name, " ", " ");
422: if (dflag)
423: printf(" %5.5s", " ");
1.1 deraadt 424: if (lastif - iftot > 0) {
1.22 camield 425: if (bflag)
426: printf(" %7.7s in %8.8s %6.6s out %5.5s",
427: "total", " ", "total", " ");
428: else
429: printf(" %5.5s in %5.5s%5.5s out %5.5s %5.5s",
430: "total", " ", "total", " ", " ");
1.1 deraadt 431: if (dflag)
1.22 camield 432: printf(" %5.5s", " ");
1.1 deraadt 433: }
434: for (ip = iftot; ip < iftot + MAXIF; ip++) {
435: ip->ift_ip = 0;
1.22 camield 436: ip->ift_ib = 0;
1.1 deraadt 437: ip->ift_ie = 0;
438: ip->ift_op = 0;
1.22 camield 439: ip->ift_ob = 0;
1.1 deraadt 440: ip->ift_oe = 0;
441: ip->ift_co = 0;
442: ip->ift_dr = 0;
443: }
444: putchar('\n');
1.22 camield 445: if (bflag)
446: printf("%10.10s %8.8s %10.10s %5.5s",
447: "bytes", " ", "bytes", " ");
448: else
449: printf("%8.8s %5.5s %8.8s %5.5s %5.5s",
450: "packets", "errs", "packets", "errs", "colls");
1.1 deraadt 451: if (dflag)
452: printf(" %5.5s", "drops");
1.22 camield 453: if (lastif - iftot > 0) {
454: if (bflag)
455: printf(" %10.10s %8.8s %10.10s %5.5s",
456: "bytes", " ", "bytes", " ");
457: else
458: printf(" %8.8s %5.5s %8.8s %5.5s %5.5s",
459: "packets", "errs", "packets", "errs", "colls");
460: if (dflag)
461: printf(" %5.5s", "drops");
462: }
1.1 deraadt 463: putchar('\n');
464: fflush(stdout);
465: line = 0;
466: loop:
467: sum->ift_ip = 0;
1.22 camield 468: sum->ift_ib = 0;
1.1 deraadt 469: sum->ift_ie = 0;
470: sum->ift_op = 0;
1.22 camield 471: sum->ift_ob = 0;
1.1 deraadt 472: sum->ift_oe = 0;
473: sum->ift_co = 0;
474: sum->ift_dr = 0;
475: for (off = firstifnet, ip = iftot; off && ip < lastif; ip++) {
1.43 jaredy 476: if (kread(off, &ifnet, sizeof ifnet)) {
1.1 deraadt 477: off = 0;
478: continue;
479: }
480: if (ip == interesting) {
1.22 camield 481: if (bflag)
482: printf("%10lu %8.8s %10lu %5.5s",
483: ifnet.if_ibytes - ip->ift_ib, " ",
484: ifnet.if_obytes - ip->ift_ob, " ");
485: else
486: printf("%8lu %5lu %8lu %5lu %5lu",
487: ifnet.if_ipackets - ip->ift_ip,
488: ifnet.if_ierrors - ip->ift_ie,
489: ifnet.if_opackets - ip->ift_op,
490: ifnet.if_oerrors - ip->ift_oe,
491: ifnet.if_collisions - ip->ift_co);
1.1 deraadt 492: if (dflag)
1.41 jaredy 493: printf(" %5lu",
1.1 deraadt 494: ifnet.if_snd.ifq_drops - ip->ift_dr);
495: }
496: ip->ift_ip = ifnet.if_ipackets;
1.22 camield 497: ip->ift_ib = ifnet.if_ibytes;
1.1 deraadt 498: ip->ift_ie = ifnet.if_ierrors;
499: ip->ift_op = ifnet.if_opackets;
1.22 camield 500: ip->ift_ob = ifnet.if_obytes;
1.1 deraadt 501: ip->ift_oe = ifnet.if_oerrors;
502: ip->ift_co = ifnet.if_collisions;
503: ip->ift_dr = ifnet.if_snd.ifq_drops;
504: sum->ift_ip += ip->ift_ip;
1.22 camield 505: sum->ift_ib += ip->ift_ib;
1.1 deraadt 506: sum->ift_ie += ip->ift_ie;
507: sum->ift_op += ip->ift_op;
1.22 camield 508: sum->ift_ob += ip->ift_ob;
1.1 deraadt 509: sum->ift_oe += ip->ift_oe;
510: sum->ift_co += ip->ift_co;
511: sum->ift_dr += ip->ift_dr;
1.45 ! otto 512: off = (u_long)TAILQ_NEXT(&ifnet, if_list);
1.1 deraadt 513: }
514: if (lastif - iftot > 0) {
1.22 camield 515: if (bflag)
516: printf(" %10lu %8.8s %10lu %5.5s",
1.41 jaredy 517: sum->ift_ib - total->ift_ib, " ",
518: sum->ift_ob - total->ift_ob, " ");
1.22 camield 519: else
520: printf(" %8lu %5lu %8lu %5lu %5lu",
1.41 jaredy 521: sum->ift_ip - total->ift_ip,
522: sum->ift_ie - total->ift_ie,
523: sum->ift_op - total->ift_op,
524: sum->ift_oe - total->ift_oe,
525: sum->ift_co - total->ift_co);
1.1 deraadt 526: if (dflag)
1.41 jaredy 527: printf(" %5lu", sum->ift_dr - total->ift_dr);
1.1 deraadt 528: }
529: *total = *sum;
530: putchar('\n');
531: fflush(stdout);
532: line++;
1.26 millert 533: sigemptyset(&emptyset);
534: if (!signalled)
535: sigsuspend(&emptyset);
1.1 deraadt 536: signalled = NO;
537: (void)alarm(interval);
538: if (line == 21)
539: goto banner;
540: goto loop;
541: /*NOTREACHED*/
542: }
543:
544: /*
545: * Called if an interval expires before sidewaysintpr has completed a loop.
546: * Sets a flag to not wait for the alarm.
547: */
548: static void
1.33 deraadt 549: catchalarm(int signo)
1.1 deraadt 550: {
551: signalled = YES;
552: }
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