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1.37 ! deraadt 1: /* $OpenBSD: if.c,v 1.36 2003/07/10 00:06:51 david 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
1.37 ! deraadt 37: static char *rcsid = "$OpenBSD: if.c,v 1.36 2003/07/10 00:06:51 david 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>
1.1 deraadt 51: #include <netns/ns.h>
52: #include <netns/ns_if.h>
1.8 mickey 53: #include <netipx/ipx.h>
54: #include <netipx/ipx_if.h>
1.1 deraadt 55: #include <netiso/iso.h>
56: #include <netiso/iso_var.h>
57: #include <arpa/inet.h>
58:
1.13 millert 59: #include <limits.h>
1.1 deraadt 60: #include <signal.h>
61: #include <stdio.h>
1.36 david 62: #include <stdlib.h>
1.1 deraadt 63: #include <string.h>
64: #include <unistd.h>
65:
66: #include "netstat.h"
67:
68: #define YES 1
69: #define NO 0
70:
1.29 millert 71: static void sidewaysintpr(u_int, u_long);
72: static void catchalarm(int);
1.1 deraadt 73:
74: /*
75: * Print a description of the network interfaces.
1.3 deraadt 76: * NOTE: ifnetaddr is the location of the kernel global "ifnet",
77: * which is a TAILQ_HEAD.
1.1 deraadt 78: */
79: void
1.33 deraadt 80: intpr(int interval, u_long ifnetaddr)
1.1 deraadt 81: {
82: struct ifnet ifnet;
83: union {
84: struct ifaddr ifa;
85: struct in_ifaddr in;
1.18 itojun 86: #ifdef INET6
87: struct in6_ifaddr in6;
88: #endif
1.1 deraadt 89: struct ns_ifaddr ns;
1.8 mickey 90: struct ipx_ifaddr ipx;
1.1 deraadt 91: struct iso_ifaddr iso;
92: } ifaddr;
1.33 deraadt 93: u_long total, ifaddraddr;
1.1 deraadt 94: struct sockaddr *sa;
1.3 deraadt 95: struct ifnet_head ifhead; /* TAILQ_HEAD */
96: char name[IFNAMSIZ];
1.1 deraadt 97:
98: if (ifnetaddr == 0) {
99: printf("ifnet: symbol not defined\n");
100: return;
101: }
102: if (interval) {
103: sidewaysintpr((unsigned)interval, ifnetaddr);
104: return;
105: }
1.3 deraadt 106:
107: /*
108: * Find the pointer to the first ifnet structure. Replace
109: * the pointer to the TAILQ_HEAD with the actual pointer
110: * to the first list element.
111: */
112: if (kread(ifnetaddr, (char *)&ifhead, sizeof ifhead))
1.1 deraadt 113: return;
1.3 deraadt 114: ifnetaddr = (u_long)ifhead.tqh_first;
115:
1.22 camield 116: printf("%-7.7s %-5.5s %-11.11s %-17.17s ",
1.33 deraadt 117: "Name", "Mtu", "Network", "Address");
1.22 camield 118: if (bflag)
119: printf("%10.10s %10.10s", "Ibytes", "Obytes");
120: else
121: printf("%8.8s %5.5s %8.8s %5.5s %5.5s",
122: "Ipkts", "Ierrs", "Opkts", "Oerrs", "Colls");
1.1 deraadt 123: if (tflag)
124: printf(" %s", "Time");
125: if (dflag)
126: printf(" %s", "Drop");
127: putchar('\n');
128: ifaddraddr = 0;
129: while (ifnetaddr || ifaddraddr) {
130: struct sockaddr_in *sin;
1.18 itojun 131: #ifdef INET6
132: struct sockaddr_in6 *sin6;
133: #endif
1.27 mpech 134: char *cp;
1.1 deraadt 135: int n, m;
136:
137: if (ifaddraddr == 0) {
1.3 deraadt 138: if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet))
1.1 deraadt 139: return;
1.3 deraadt 140: bcopy(ifnet.if_xname, name, IFNAMSIZ);
141: name[IFNAMSIZ - 1] = '\0'; /* sanity */
1.1 deraadt 142: ifnetaddr = (u_long)ifnet.if_list.tqe_next;
1.3 deraadt 143: if (interface != 0 && strcmp(name, interface) != 0)
1.1 deraadt 144: continue;
1.10 millert 145: cp = strchr(name, '\0');
1.1 deraadt 146: if ((ifnet.if_flags & IFF_UP) == 0)
147: *cp++ = '*';
148: *cp = '\0';
149: ifaddraddr = (u_long)ifnet.if_addrlist.tqh_first;
150: }
1.25 brian 151:
152: if (qflag) {
153: total = ifnet.if_ibytes + ifnet.if_obytes +
154: ifnet.if_ipackets + ifnet.if_ierrors +
155: ifnet.if_opackets + ifnet.if_oerrors +
156: ifnet.if_collisions;
157: if (tflag)
158: total += ifnet.if_timer;
159: if (dflag)
160: total += ifnet.if_snd.ifq_drops;
161: if (total == 0) {
162: ifaddraddr = 0;
163: continue;
164: }
165: }
166:
1.16 mickey 167: printf("%-7.7s %-5ld ", name, ifnet.if_mtu);
1.1 deraadt 168: if (ifaddraddr == 0) {
169: printf("%-11.11s ", "none");
1.37 ! deraadt 170: printf("%-17.17s ", "none");
1.1 deraadt 171: } else {
172: if (kread(ifaddraddr, (char *)&ifaddr, sizeof ifaddr)) {
173: ifaddraddr = 0;
174: continue;
175: }
176: #define CP(x) ((char *)(x))
177: cp = (CP(ifaddr.ifa.ifa_addr) - CP(ifaddraddr)) +
178: CP(&ifaddr); sa = (struct sockaddr *)cp;
179: switch (sa->sa_family) {
180: case AF_UNSPEC:
181: printf("%-11.11s ", "none");
182: printf("%-17.17s ", "none");
183: break;
184: case AF_INET:
185: sin = (struct sockaddr_in *)sa;
186: #ifdef notdef
187: /* can't use inet_makeaddr because kernel
188: * keeps nets unshifted.
189: */
190: in = inet_makeaddr(ifaddr.in.ia_subnet,
1.30 deraadt 191: INADDR_ANY);
1.20 itojun 192: cp = netname(in.s_addr,
1.30 deraadt 193: ifaddr.in.ia_subnetmask);
1.1 deraadt 194: #else
1.20 itojun 195: cp = netname(ifaddr.in.ia_subnet,
196: ifaddr.in.ia_subnetmask);
1.1 deraadt 197: #endif
1.20 itojun 198: if (vflag)
199: n = strlen(cp) < 11 ? 11 : strlen(cp);
200: else
201: n = 11;
202: printf("%-*.*s ", n, n, cp);
203: cp = routename(sin->sin_addr.s_addr);
204: if (vflag)
205: n = strlen(cp) < 17 ? 17 : strlen(cp);
206: else
207: n = 17;
208: printf("%-*.*s ", n, n, cp);
1.1 deraadt 209:
210: if (aflag) {
211: u_long multiaddr;
212: struct in_multi inm;
1.28 mickey 213:
1.1 deraadt 214: multiaddr = (u_long)ifaddr.in.ia_multiaddrs.lh_first;
215: while (multiaddr != 0) {
216: kread(multiaddr, (char *)&inm,
217: sizeof inm);
1.19 itojun 218: printf("\n%25s %-17.17s ", "",
1.1 deraadt 219: routename(inm.inm_addr.s_addr));
220: multiaddr = (u_long)inm.inm_list.le_next;
221: }
1.8 mickey 222: }
223: break;
1.18 itojun 224: #ifdef INET6
225: case AF_INET6:
226: sin6 = (struct sockaddr_in6 *)sa;
1.34 itojun 227: #ifdef __KAME__
1.20 itojun 228: if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
229: sin6->sin6_scope_id =
1.30 deraadt 230: ntohs(*(u_int16_t *)
231: &sin6->sin6_addr.s6_addr[2]);
1.20 itojun 232: sin6->sin6_addr.s6_addr[2] = 0;
233: sin6->sin6_addr.s6_addr[3] = 0;
234: }
235: #endif
236: cp = netname6(&ifaddr.in6.ia_addr,
1.30 deraadt 237: &ifaddr.in6.ia_prefixmask.sin6_addr);
1.20 itojun 238: if (vflag)
239: n = strlen(cp) < 11 ? 11 : strlen(cp);
240: else
241: n = 11;
242: printf("%-*.*s ", n, n, cp);
243: cp = routename6(sin6);
244: if (vflag)
245: n = strlen(cp) < 17 ? 17 : strlen(cp);
246: else
247: n = 17;
248: printf("%-*.*s ", n, n, cp);
1.19 itojun 249: if (aflag) {
250: u_long multiaddr;
251: struct in6_multi inm;
1.31 itojun 252: struct sockaddr_in6 m6;
1.28 mickey 253:
1.19 itojun 254: multiaddr = (u_long)ifaddr.in6.ia6_multiaddrs.lh_first;
255: while (multiaddr != 0) {
256: kread(multiaddr, (char *)&inm,
257: sizeof inm);
1.31 itojun 258: memset(&m6, 0, sizeof(m6));
259: m6.sin6_len = sizeof(struct sockaddr_in6);
260: m6.sin6_family = AF_INET6;
261: m6.sin6_addr = inm.in6m_addr;
1.34 itojun 262: #ifdef __KAME__
1.32 itojun 263: if (IN6_IS_ADDR_MC_LINKLOCAL(&m6.sin6_addr)) {
1.31 itojun 264: m6.sin6_scope_id =
265: ntohs(*(u_int16_t *)
266: &m6.sin6_addr.s6_addr[2]);
267: m6.sin6_addr.s6_addr[2] = 0;
268: m6.sin6_addr.s6_addr[3] = 0;
269: }
270: #endif
271: cp = routename6(&m6);
1.19 itojun 272: if (vflag)
1.31 itojun 273: n = strlen(cp) < 17 ? 17 : strlen(cp);
1.19 itojun 274: else
275: n = 17;
276: printf("\n%25s %-*.*s ", "",
1.31 itojun 277: n, n, cp);
1.19 itojun 278: multiaddr = (u_long)inm.in6m_entry.le_next;
279: }
280: }
1.18 itojun 281: break;
282: #endif
1.8 mickey 283: case AF_IPX:
284: {
285: struct sockaddr_ipx *sipx =
286: (struct sockaddr_ipx *)sa;
287: u_long net;
288: char netnum[8];
289:
1.17 deraadt 290: *(union ipx_net *)&net = sipx->sipx_addr.ipx_net;
291: snprintf(netnum, sizeof netnum, "%xH",
292: ntohl(net));
1.8 mickey 293: upHex(netnum);
294: printf("ipx:%-8s", netnum);
295: printf("%-17s ",
296: ipx_phost((struct sockaddr *)sipx));
1.1 deraadt 297: }
1.15 denny 298: break;
299: case AF_APPLETALK:
300: printf("atlk:%-12s",atalk_print(sa,0x10) );
301: printf("%-12s ",atalk_print(sa,0x0b) );
1.1 deraadt 302: break;
303: case AF_NS:
304: {
305: struct sockaddr_ns *sns =
306: (struct sockaddr_ns *)sa;
307: u_long net;
308: char netnum[8];
309:
1.17 deraadt 310: *(union ns_net *)&net = sns->sns_addr.x_net;
311: snprintf(netnum, sizeof netnum, "%xH",
312: ntohl(net));
1.1 deraadt 313: upHex(netnum);
314: printf("ns:%-8s ", netnum);
315: printf("%-17s ",
316: ns_phost((struct sockaddr *)sns));
317: }
318: break;
319: case AF_LINK:
320: {
321: struct sockaddr_dl *sdl =
322: (struct sockaddr_dl *)sa;
1.5 deraadt 323: m = printf("%-11.11s ", "<Link>");
324: if (sdl->sdl_type == IFT_ETHER ||
1.23 fgsch 325: sdl->sdl_type == IFT_FDDI ||
326: sdl->sdl_type == IFT_ISO88025)
1.5 deraadt 327: printf("%-17.17s ",
1.11 millert 328: ether_ntoa((struct ether_addr *)LLADDR(sdl)));
1.5 deraadt 329: else {
330: cp = (char *)LLADDR(sdl);
331: n = sdl->sdl_alen;
332: goto hexprint;
333: }
1.1 deraadt 334: }
1.5 deraadt 335: break;
1.1 deraadt 336: default:
337: m = printf("(%d)", sa->sa_family);
338: for (cp = sa->sa_len + (char *)sa;
339: --cp > sa->sa_data && (*cp == 0);) {}
340: n = cp - sa->sa_data + 1;
341: cp = sa->sa_data;
342: hexprint:
343: while (--n >= 0)
344: m += printf("%x%c", *cp++ & 0xff,
345: n > 0 ? '.' : ' ');
346: m = 30 - m;
347: while (m-- > 0)
348: putchar(' ');
349: break;
350: }
351: ifaddraddr = (u_long)ifaddr.ifa.ifa_list.tqe_next;
352: }
1.22 camield 353: if (bflag)
354: printf("%10lu %10lu",
355: ifnet.if_ibytes, ifnet.if_obytes);
356: else
357: printf("%8lu %5lu %8lu %5lu %5lu",
358: ifnet.if_ipackets, ifnet.if_ierrors,
359: ifnet.if_opackets, ifnet.if_oerrors,
360: ifnet.if_collisions);
1.1 deraadt 361: if (tflag)
1.22 camield 362: printf(" %4d", ifnet.if_timer);
1.1 deraadt 363: if (dflag)
1.22 camield 364: printf(" %4d", ifnet.if_snd.ifq_drops);
1.1 deraadt 365: putchar('\n');
366: }
367: }
368:
1.4 deraadt 369: #define MAXIF 100
1.1 deraadt 370: struct iftot {
1.3 deraadt 371: char ift_name[IFNAMSIZ]; /* interface name */
1.1 deraadt 372: int ift_ip; /* input packets */
1.22 camield 373: int ift_ib; /* input bytes */
1.1 deraadt 374: int ift_ie; /* input errors */
375: int ift_op; /* output packets */
1.22 camield 376: int ift_ob; /* output bytes */
1.1 deraadt 377: int ift_oe; /* output errors */
378: int ift_co; /* collisions */
379: int ift_dr; /* drops */
380: } iftot[MAXIF];
381:
1.26 millert 382: volatile sig_atomic_t signalled; /* set if alarm goes off "early" */
1.1 deraadt 383:
384: /*
385: * Print a running summary of interface statistics.
386: * Repeat display every interval seconds, showing statistics
387: * collected over that interval. Assumes that interval is non-zero.
388: * First line printed at top of screen is always cumulative.
389: */
390: static void
1.33 deraadt 391: sidewaysintpr(unsigned int interval, u_long off)
1.1 deraadt 392: {
393: struct ifnet ifnet;
394: u_long firstifnet;
1.27 mpech 395: struct iftot *ip, *total;
396: int line;
1.1 deraadt 397: struct iftot *lastif, *sum, *interesting;
1.3 deraadt 398: struct ifnet_head ifhead; /* TAILQ_HEAD */
1.26 millert 399: sigset_t emptyset;
1.1 deraadt 400:
1.3 deraadt 401: /*
402: * Find the pointer to the first ifnet structure. Replace
403: * the pointer to the TAILQ_HEAD with the actual pointer
404: * to the first list element.
405: */
406: if (kread(off, (char *)&ifhead, sizeof ifhead))
1.1 deraadt 407: return;
1.3 deraadt 408: firstifnet = (u_long)ifhead.tqh_first;
409:
1.1 deraadt 410: lastif = iftot;
411: sum = iftot + MAXIF - 1;
412: total = sum - 1;
1.4 deraadt 413: interesting = (interface == NULL) ? iftot : NULL;
1.1 deraadt 414: for (off = firstifnet, ip = iftot; off;) {
415: if (kread(off, (char *)&ifnet, sizeof ifnet))
416: break;
1.6 deraadt 417: bzero(ip->ift_name, sizeof(ip->ift_name));
1.22 camield 418: snprintf(ip->ift_name, IFNAMSIZ, "%s", ifnet.if_xname);
1.6 deraadt 419: if (interface && strcmp(ifnet.if_xname, interface) == 0)
1.1 deraadt 420: interesting = ip;
421: ip++;
422: if (ip >= iftot + MAXIF - 2)
423: break;
424: off = (u_long)ifnet.if_list.tqe_next;
1.4 deraadt 425: }
426: if (interesting == NULL) {
427: fprintf(stderr, "%s: %s: unknown interface\n",
428: __progname, interface);
429: exit(1);
1.1 deraadt 430: }
431: lastif = ip;
432:
433: (void)signal(SIGALRM, catchalarm);
434: signalled = NO;
435: (void)alarm(interval);
436: banner:
1.22 camield 437: if (bflag)
438: printf("%7.7s in %8.8s %6.6s out %5.5s",
439: interesting->ift_name, " ",
440: interesting->ift_name, " ");
441: else
442: printf("%5.5s in %5.5s%5.5s out %5.5s %5.5s",
443: interesting->ift_name, " ",
444: interesting->ift_name, " ", " ");
445: if (dflag)
446: printf(" %5.5s", " ");
1.1 deraadt 447: if (lastif - iftot > 0) {
1.22 camield 448: if (bflag)
449: printf(" %7.7s in %8.8s %6.6s out %5.5s",
450: "total", " ", "total", " ");
451: else
452: printf(" %5.5s in %5.5s%5.5s out %5.5s %5.5s",
453: "total", " ", "total", " ", " ");
1.1 deraadt 454: if (dflag)
1.22 camield 455: printf(" %5.5s", " ");
1.1 deraadt 456: }
457: for (ip = iftot; ip < iftot + MAXIF; ip++) {
458: ip->ift_ip = 0;
1.22 camield 459: ip->ift_ib = 0;
1.1 deraadt 460: ip->ift_ie = 0;
461: ip->ift_op = 0;
1.22 camield 462: ip->ift_ob = 0;
1.1 deraadt 463: ip->ift_oe = 0;
464: ip->ift_co = 0;
465: ip->ift_dr = 0;
466: }
467: putchar('\n');
1.22 camield 468: if (bflag)
469: printf("%10.10s %8.8s %10.10s %5.5s",
470: "bytes", " ", "bytes", " ");
471: else
472: printf("%8.8s %5.5s %8.8s %5.5s %5.5s",
473: "packets", "errs", "packets", "errs", "colls");
1.1 deraadt 474: if (dflag)
475: printf(" %5.5s", "drops");
1.22 camield 476: if (lastif - iftot > 0) {
477: if (bflag)
478: printf(" %10.10s %8.8s %10.10s %5.5s",
479: "bytes", " ", "bytes", " ");
480: else
481: printf(" %8.8s %5.5s %8.8s %5.5s %5.5s",
482: "packets", "errs", "packets", "errs", "colls");
483: if (dflag)
484: printf(" %5.5s", "drops");
485: }
1.1 deraadt 486: putchar('\n');
487: fflush(stdout);
488: line = 0;
489: loop:
490: sum->ift_ip = 0;
1.22 camield 491: sum->ift_ib = 0;
1.1 deraadt 492: sum->ift_ie = 0;
493: sum->ift_op = 0;
1.22 camield 494: sum->ift_ob = 0;
1.1 deraadt 495: sum->ift_oe = 0;
496: sum->ift_co = 0;
497: sum->ift_dr = 0;
498: for (off = firstifnet, ip = iftot; off && ip < lastif; ip++) {
499: if (kread(off, (char *)&ifnet, sizeof ifnet)) {
500: off = 0;
501: continue;
502: }
503: if (ip == interesting) {
1.22 camield 504: if (bflag)
505: printf("%10lu %8.8s %10lu %5.5s",
506: ifnet.if_ibytes - ip->ift_ib, " ",
507: ifnet.if_obytes - ip->ift_ob, " ");
508: else
509: printf("%8lu %5lu %8lu %5lu %5lu",
510: ifnet.if_ipackets - ip->ift_ip,
511: ifnet.if_ierrors - ip->ift_ie,
512: ifnet.if_opackets - ip->ift_op,
513: ifnet.if_oerrors - ip->ift_oe,
514: ifnet.if_collisions - ip->ift_co);
1.1 deraadt 515: if (dflag)
516: printf(" %5d",
517: ifnet.if_snd.ifq_drops - ip->ift_dr);
518: }
519: ip->ift_ip = ifnet.if_ipackets;
1.22 camield 520: ip->ift_ib = ifnet.if_ibytes;
1.1 deraadt 521: ip->ift_ie = ifnet.if_ierrors;
522: ip->ift_op = ifnet.if_opackets;
1.22 camield 523: ip->ift_ob = ifnet.if_obytes;
1.1 deraadt 524: ip->ift_oe = ifnet.if_oerrors;
525: ip->ift_co = ifnet.if_collisions;
526: ip->ift_dr = ifnet.if_snd.ifq_drops;
527: sum->ift_ip += ip->ift_ip;
1.22 camield 528: sum->ift_ib += ip->ift_ib;
1.1 deraadt 529: sum->ift_ie += ip->ift_ie;
530: sum->ift_op += ip->ift_op;
1.22 camield 531: sum->ift_ob += ip->ift_ob;
1.1 deraadt 532: sum->ift_oe += ip->ift_oe;
533: sum->ift_co += ip->ift_co;
534: sum->ift_dr += ip->ift_dr;
535: off = (u_long)ifnet.if_list.tqe_next;
536: }
537: if (lastif - iftot > 0) {
1.22 camield 538: if (bflag)
539: printf(" %10lu %8.8s %10lu %5.5s",
1.24 pvalchev 540: (unsigned long)sum->ift_ib - total->ift_ib, " ",
541: (unsigned long)sum->ift_ob - total->ift_ob, " ");
1.22 camield 542: else
543: printf(" %8lu %5lu %8lu %5lu %5lu",
1.24 pvalchev 544: (unsigned long)sum->ift_ip - total->ift_ip,
545: (unsigned long)sum->ift_ie - total->ift_ie,
546: (unsigned long)sum->ift_op - total->ift_op,
547: (unsigned long)sum->ift_oe - total->ift_oe,
548: (unsigned long)sum->ift_co - total->ift_co);
1.1 deraadt 549: if (dflag)
550: printf(" %5d", sum->ift_dr - total->ift_dr);
551: }
552: *total = *sum;
553: putchar('\n');
554: fflush(stdout);
555: line++;
1.26 millert 556: sigemptyset(&emptyset);
557: if (!signalled)
558: sigsuspend(&emptyset);
1.1 deraadt 559: signalled = NO;
560: (void)alarm(interval);
561: if (line == 21)
562: goto banner;
563: goto loop;
564: /*NOTREACHED*/
565: }
566:
567: /*
568: * Called if an interval expires before sidewaysintpr has completed a loop.
569: * Sets a flag to not wait for the alarm.
570: */
571: static void
1.33 deraadt 572: catchalarm(int signo)
1.1 deraadt 573: {
574: signalled = YES;
575: }