freebsd-dev/usr.sbin/slstat/slstat.c
Paul Traina 66e5b18f29 Drop privileges if not using standard namelist or kernel file.
Submitted by:	smpatel (Sujal Patel)
1996-05-30 02:20:10 +00:00

323 lines
7.1 KiB
C

/*
* print serial line IP statistics:
* slstat [-i interval] [-v] [interface] [system] [core]
*
* Copyright (c) 1989, 1990, 1991, 1992 Regents of the University of
* California. All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley. The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* Van Jacobson (van@ee.lbl.gov), Dec 31, 1989:
* - Initial distribution.
*/
#ifndef lint
static char rcsid[] = "$Id: slstat.c,v 1.4 1995/05/30 03:52:30 rgrimes Exp $";
#endif
#include <stdio.h>
#include <paths.h>
#include <nlist.h>
#include <kvm.h>
#define INET
#include <limits.h>
#include <sys/param.h>
#include <sys/mbuf.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/file.h>
#include <errno.h>
#include <signal.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#include <net/slcompress.h>
#include <net/if_slvar.h>
struct nlist nl[] = {
#define N_SOFTC 0
{ "_sl_softc" },
{ 0 }
};
#define INTERFACE_PREFIX "sl%d"
char interface[IFNAMSIZ];
const char *system = NULL;
char *kmemf = NULL;
kvm_t *kvm_h;
int kflag;
int rflag;
int vflag;
unsigned interval = 5;
int unit;
extern char *malloc();
extern off_t lseek();
main(argc, argv)
int argc;
char *argv[];
{
int c;
char errbuf[_POSIX2_LINE_MAX];
system = getbootfile();
--argc; ++argv;
while (argc > 0) {
if (strcmp(argv[0], "-v") == 0) {
++vflag;
++argv, --argc;
continue;
}
if (strcmp(argv[0], "-r") == 0) {
++rflag;
++argv, --argc;
continue;
}
if (strcmp(argv[0], "-i") == 0 && argv[1] &&
isdigit(argv[1][0])) {
interval = atoi(argv[1]);
if (interval <= 0)
usage();
++argv, --argc;
++argv, --argc;
continue;
}
if (isdigit(argv[0][0])) {
int s;
struct ifreq ifr;
unit = atoi(argv[0]);
if (unit < 0)
usage();
sprintf(interface, INTERFACE_PREFIX, unit);
s = socket(AF_INET, SOCK_DGRAM, 0);
if (s < 0)
err(1, "creating socket");
strcpy(ifr.ifr_name, interface);
if (ioctl(s, SIOCGIFFLAGS, (caddr_t)&ifr) < 0)
errx(1,
"unable to confirm existence of interface '%s'",
interface);
++argv, --argc;
continue;
}
if (kflag)
usage();
system = *argv;
++argv, --argc;
if (argc > 0) {
kmemf = *argv++;
--argc;
kflag++;
}
}
/*
* Discard setgid privileges if not the running kernel so that bad
* guys can't print interesting stuff from kernel memory.
*/
if (system != NULL || kmemf != NULL)
setgid(getgid());
kvm_h = kvm_openfiles(system, kmemf, NULL, O_RDONLY, errbuf);
if (kvm_h == 0) {
(void)fprintf(stderr,
"slstat: kvm_openfiles(%s,%s,0): %s\n",
system, kmemf, errbuf);
exit(1);
}
if ((c = kvm_nlist(kvm_h, nl)) != 0) {
if (c > 0) {
(void)fprintf(stderr,
"slstat: undefined symbols in %s:", system);
for (c = 0; c < sizeof(nl)/sizeof(nl[0]); c++)
if (nl[c].n_type == 0)
fprintf(stderr, " %s", nl[c].n_name);
(void)fputc('\n', stderr);
} else
(void)fprintf(stderr, "slstat: kvm_nlist: %s\n",
kvm_geterr(kvm_h));
exit(1);
}
intpr();
exit(0);
}
#define V(offset) ((line % 20)? ((sc->offset - osc->offset) / \
(rflag ? interval : 1)) : sc->offset)
#define AMT (sizeof(*sc) - 2 * sizeof(sc->sc_comp.tstate))
usage()
{
static char umsg[] =
"usage: slstat [-i interval] [-v] [unit] [system] [core]\n";
fprintf(stderr, umsg);
exit(1);
}
u_char signalled; /* set if alarm goes off "early" */
/*
* Print a running summary of interface statistics.
* Repeat display every interval seconds, showing statistics
* collected over that interval. Assumes that interval is non-zero.
* First line printed at top of screen is always cumulative.
*/
intpr()
{
register int line = 0;
int oldmask;
void catchalarm();
struct sl_softc *sc, *osc;
off_t addr;
addr = nl[N_SOFTC].n_value + unit * sizeof(struct sl_softc);
sc = (struct sl_softc *)malloc(AMT);
osc = (struct sl_softc *)malloc(AMT);
bzero((char *)osc, AMT);
while (1) {
if (kvm_read(kvm_h, addr, (char *)sc, AMT) < 0)
perror("kmem read");
(void)signal(SIGALRM, catchalarm);
signalled = 0;
(void)alarm(interval);
if ((line % 20) == 0) {
printf("%8.8s %6.6s %6.6s %6.6s %6.6s",
"in", "pack", "comp", "uncomp", "unknwn");
if (vflag)
printf(" %6.6s %6.6s %6.6s",
"toss", "other", "err");
printf(" | %8.8s %6.6s %6.6s %6.6s %6.6s",
"out", "pack", "comp", "uncomp", "other");
if (vflag)
printf(" %6.6s %6.6s %6.6s %6.6s",
"search", "miss", "err", "coll");
putchar('\n');
}
printf("%8u %6d %6u %6u %6u",
V(sc_if.if_ibytes),
V(sc_if.if_ipackets),
V(sc_comp.sls_compressedin),
V(sc_comp.sls_uncompressedin),
V(sc_comp.sls_errorin));
if (vflag)
printf(" %6u %6u %6u",
V(sc_comp.sls_tossed),
V(sc_if.if_ipackets) -
V(sc_comp.sls_compressedin) -
V(sc_comp.sls_uncompressedin) -
V(sc_comp.sls_errorin),
V(sc_if.if_ierrors));
printf(" | %8u %6d %6u %6u %6u",
V(sc_if.if_obytes) / (rflag ? interval : 1),
V(sc_if.if_opackets),
V(sc_comp.sls_compressed),
V(sc_comp.sls_packets) - V(sc_comp.sls_compressed),
V(sc_if.if_opackets) - V(sc_comp.sls_packets));
if (vflag)
printf(" %6u %6u %6u %6u",
V(sc_comp.sls_searches),
V(sc_comp.sls_misses),
V(sc_if.if_oerrors),
V(sc_if.if_collisions));
putchar('\n');
fflush(stdout);
line++;
oldmask = sigblock(sigmask(SIGALRM));
if (! signalled) {
sigpause(0);
}
sigsetmask(oldmask);
signalled = 0;
(void)alarm(interval);
bcopy((char *)sc, (char *)osc, AMT);
}
}
/*
* Called if an interval expires before sidewaysintpr has completed a loop.
* Sets a flag to not wait for the alarm.
*/
void
catchalarm()
{
signalled = 1;
}
#if 0
#include <kvm.h>
#include <fcntl.h>
int kd;
kopen(system, kmemf, errstr)
char *system;
char *kmemf;
char *errstr;
{
if (strcmp(system, _PATH_UNIX) == 0 &&
strcmp(kmemf, _PATH_KMEM) == 0) {
system = 0;
kmemf = 0;
}
kd = kvm_openfiles(system, kmemf, (void *)0);
if (kd == 0)
return -1;
return 0;
}
int
knlist(system, nl, errstr)
char *system;
struct nlist *nl;
char *errstr;
{
if (kd == 0)
/* kopen() must be called first */
abort();
if (kvm_nlist(nl) < 0 || nl[0].n_type == 0) {
fprintf(stderr, "%s: %s: no namelist\n", errstr, system);
return -1;
}
return 0;
}
int
kread(addr, buf, size)
off_t addr;
char *buf;
int size;
{
if (kvm_read((char *)addr, buf, size) != size)
return -1;
return 0;
}
#endif