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661a5e433a
freebsd/usr.bin/ipcs/ipcs.c
Paul Traina 661a5e433a Drop privileges if we're not reading standard kernel file or namelist. 
Submitted by:	smpatel (Sujal Patel)
1996-05-30 02:18:44 +00:00

494 lines
13 KiB
C
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/*
* Copyright (c) 1994 SigmaSoft, Th. Lockert <tholo@sigmasoft.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author 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 ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: ipcs.c,v 1.4 1995/07/12 19:10:17 bde Exp $
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <paths.h>
#include <nlist.h>
#include <kvm.h>
#include <err.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/proc.h>
#define KERNEL
#include <sys/ipc.h>
#include <sys/sem.h>
#include <sys/shm.h>
#include <sys/msg.h>
struct semid_ds *sema;
struct seminfo seminfo;
struct msginfo msginfo;
struct msqid_ds *msqids;
struct shminfo shminfo;
struct shmid_ds *shmsegs;
int semconfig __P((int,...));
void usage __P((void));
static struct nlist symbols[] = {
{"_sema"},
#define X_SEMA 0
{"_seminfo"},
#define X_SEMINFO 1
{"_semu"},
#define X_SEMU 2
{"_msginfo"},
#define X_MSGINFO 3
{"_msqids"},
#define X_MSQIDS 4
{"_shminfo"},
#define X_SHMINFO 5
{"_shmsegs"},
#define X_SHMSEGS 6
{NULL}
};
static kvm_t *kd;
char *
fmt_perm(mode)
u_short mode;
{
static char buffer[100];
buffer[0] = '-';
buffer[1] = '-';
buffer[2] = ((mode & 0400) ? 'r' : '-');
buffer[3] = ((mode & 0200) ? 'w' : '-');
buffer[4] = ((mode & 0100) ? 'a' : '-');
buffer[5] = ((mode & 0040) ? 'r' : '-');
buffer[6] = ((mode & 0020) ? 'w' : '-');
buffer[7] = ((mode & 0010) ? 'a' : '-');
buffer[8] = ((mode & 0004) ? 'r' : '-');
buffer[9] = ((mode & 0002) ? 'w' : '-');
buffer[10] = ((mode & 0001) ? 'a' : '-');
buffer[11] = '\0';
return (&buffer[0]);
}
void
cvt_time(t, buf)
time_t t;
char *buf;
{
struct tm *tm;
if (t == 0) {
strcpy(buf, "no-entry");
} else {
tm = localtime(&t);
sprintf(buf, "%2d:%02d:%02d",
tm->tm_hour, tm->tm_min, tm->tm_sec);
}
}
#define SHMINFO 1
#define SHMTOTAL 2
#define MSGINFO 4
#define MSGTOTAL 8
#define SEMINFO 16
#define SEMTOTAL 32
#define BIGGEST 1
#define CREATOR 2
#define OUTSTANDING 4
#define PID 8
#define TIME 16
int
main(argc, argv)
int argc;
char *argv[];
{
int display = SHMINFO | MSGINFO | SEMINFO;
int option = 0;
char *core = NULL, *namelist = NULL;
int i;
while ((i = getopt(argc, argv, "MmQqSsabC:cN:optT")) != EOF)
switch (i) {
case 'M':
display = SHMTOTAL;
break;
case 'm':
display = SHMINFO;
break;
case 'Q':
display = MSGTOTAL;
break;
case 'q':
display = MSGINFO;
break;
case 'S':
display = SEMTOTAL;
break;
case 's':
display = SEMINFO;
break;
case 'T':
display = SHMTOTAL | MSGTOTAL | SEMTOTAL;
break;
case 'a':
option |= BIGGEST | CREATOR | OUTSTANDING | PID | TIME;
break;
case 'b':
option |= BIGGEST;
break;
case 'C':
core = optarg;
break;
case 'c':
option |= CREATOR;
break;
case 'N':
namelist = optarg;
break;
case 'o':
option |= OUTSTANDING;
break;
case 'p':
option |= PID;
break;
case 't':
option |= TIME;
break;
default:
usage();
}
/*
* Discard setgid privileges if not the running kernel so that bad
* guys can't print interesting stuff from kernel memory.
*/
if (namelist != NULL || core != NULL)
setgid(getgid());
if ((kd = kvm_open(namelist, core, NULL, O_RDONLY, "ipcs")) == NULL)
exit(1);
switch (kvm_nlist(kd, symbols)) {
case 0:
break;
case -1:
errx(1, "unable to read kernel symbol table.");
default:
#ifdef notdef /* they'll be told more civilly later */
warnx("nlist failed");
for (i = 0; symbols[i].n_name != NULL; i++)
if (symbols[i].n_value == 0)
warnx("symbol %s not found",
symbols[i].n_name);
break;
#endif
}
if ((display & (MSGINFO | MSGTOTAL)) &&
kvm_read(kd, symbols[X_MSGINFO].n_value, &msginfo, sizeof(msginfo))) {
if (display & MSGTOTAL) {
printf("msginfo:\n");
printf("\tmsgmax: %6d\t(max characters in a message)\n",
msginfo.msgmax);
printf("\tmsgmni: %6d\t(# of message queues)\n",
msginfo.msgmni);
printf("\tmsgmnb: %6d\t(max characters in a message queue)\n",
msginfo.msgmnb);
printf("\tmsgtql: %6d\t(max # of messages in system)\n",
msginfo.msgtql);
printf("\tmsgssz: %6d\t(size of a message segment)\n",
msginfo.msgssz);
printf("\tmsgseg: %6d\t(# of message segments in system)\n\n",
msginfo.msgseg);
}
if (display & MSGINFO) {
struct msqid_ds *xmsqids;
kvm_read(kd, symbols[X_MSQIDS].n_value, &msqids, sizeof(msqids));
xmsqids = malloc(sizeof(struct msqid_ds) * msginfo.msgmni);
kvm_read(kd, (u_long) msqids, xmsqids, sizeof(struct msqid_ds) * msginfo.msgmni);
printf("Message Queues:\n");
printf("T ID KEY MODE OWNER GROUP");
if (option & CREATOR)
printf(" CREATOR CGROUP");
if (option & OUTSTANDING)
printf(" CBYTES QNUM");
if (option & BIGGEST)
printf(" QBYTES");
if (option & PID)
printf(" LSPID LRPID");
if (option & TIME)
printf(" STIME RTIME CTIME");
printf("\n");
for (i = 0; i < msginfo.msgmni; i += 1) {
if (xmsqids[i].msg_qbytes != 0) {
char stime_buf[100], rtime_buf[100],
ctime_buf[100];
struct msqid_ds *msqptr = &xmsqids[i];
cvt_time(msqptr->msg_stime, stime_buf);
cvt_time(msqptr->msg_rtime, rtime_buf);
cvt_time(msqptr->msg_ctime, ctime_buf);
printf("q %6d %10d %s %8s %8s",
IXSEQ_TO_IPCID(i, msqptr->msg_perm),
msqptr->msg_perm.key,
fmt_perm(msqptr->msg_perm.mode),
user_from_uid(msqptr->msg_perm.uid, 0),
group_from_gid(msqptr->msg_perm.gid, 0));
if (option & CREATOR)
printf(" %8s %8s",
user_from_uid(msqptr->msg_perm.cuid, 0),
group_from_gid(msqptr->msg_perm.cgid, 0));
if (option & OUTSTANDING)
printf(" %6d %6d",
msqptr->msg_cbytes,
msqptr->msg_qnum);
if (option & BIGGEST)
printf(" %6d",
msqptr->msg_qbytes);
if (option & PID)
printf(" %6d %6d",
msqptr->msg_lspid,
msqptr->msg_lrpid);
if (option & TIME)
printf("%s %s %s",
stime_buf,
rtime_buf,
ctime_buf);
printf("\n");
}
}
printf("\n");
}
} else
if (display & (MSGINFO | MSGTOTAL)) {
fprintf(stderr,
"SVID messages facility not configured in the system\n");
}
if ((display & (SHMINFO | SHMTOTAL)) &&
kvm_read(kd, symbols[X_SHMINFO].n_value, &shminfo, sizeof(shminfo))) {
if (display & SHMTOTAL) {
printf("shminfo:\n");
printf("\tshmmax: %7d\t(max shared memory segment size)\n",
shminfo.shmmax);
printf("\tshmmin: %7d\t(min shared memory segment size)\n",
shminfo.shmmin);
printf("\tshmmni: %7d\t(max number of shared memory identifiers)\n",
shminfo.shmmni);
printf("\tshmseg: %7d\t(max shared memory segments per process)\n",
shminfo.shmseg);
printf("\tshmall: %7d\t(max amount of shared memory in pages)\n\n",
shminfo.shmall);
}
if (display & SHMINFO) {
struct shmid_ds *xshmids;
kvm_read(kd, symbols[X_SHMSEGS].n_value, &shmsegs, sizeof(shmsegs));
xshmids = malloc(sizeof(struct shmid_ds) * msginfo.msgmni);
kvm_read(kd, (u_long) shmsegs, xshmids, sizeof(struct shmid_ds) *
shminfo.shmmni);
printf("Shared Memory:\n");
printf("T ID KEY MODE OWNER GROUP");
if (option & CREATOR)
printf(" CREATOR CGROUP");
if (option & OUTSTANDING)
printf(" NATTCH");
if (option & BIGGEST)
printf(" SEGSZ");
if (option & PID)
printf(" CPID LPID");
if (option & TIME)
printf(" ATIME DTIME CTIME");
printf("\n");
for (i = 0; i < shminfo.shmmni; i += 1) {
if (xshmids[i].shm_perm.mode & 0x0800) {
char atime_buf[100], dtime_buf[100],
ctime_buf[100];
struct shmid_ds *shmptr = &xshmids[i];
cvt_time(shmptr->shm_atime, atime_buf);
cvt_time(shmptr->shm_dtime, dtime_buf);
cvt_time(shmptr->shm_ctime, ctime_buf);
printf("m %6d %10d %s %8s %8s",
IXSEQ_TO_IPCID(i, shmptr->shm_perm),
shmptr->shm_perm.key,
fmt_perm(shmptr->shm_perm.mode),
user_from_uid(shmptr->shm_perm.uid, 0),
group_from_gid(shmptr->shm_perm.gid, 0));
if (option & CREATOR)
printf(" %8s %8s",
user_from_uid(shmptr->shm_perm.cuid, 0),
group_from_gid(shmptr->shm_perm.cgid, 0));
if (option & OUTSTANDING)
printf(" %6d",
shmptr->shm_nattch);
if (option & BIGGEST)
printf(" %6d",
shmptr->shm_segsz);
if (option & PID)
printf(" %6d %6d",
shmptr->shm_cpid,
shmptr->shm_lpid);
if (option & TIME)
printf("%s %s %s",
atime_buf,
dtime_buf,
ctime_buf);
printf("\n");
}
}
printf("\n");
}
} else
if (display & (SHMINFO | SHMTOTAL)) {
fprintf(stderr,
"SVID shared memory facility not configured in the system\n");
}
if ((display & (SEMINFO | SEMTOTAL)) &&
kvm_read(kd, symbols[X_SEMINFO].n_value, &seminfo, sizeof(seminfo))) {
struct semid_ds *xsema;
if (display & SEMTOTAL) {
printf("seminfo:\n");
printf("\tsemmap: %6d\t(# of entries in semaphore map)\n",
seminfo.semmap);
printf("\tsemmni: %6d\t(# of semaphore identifiers)\n",
seminfo.semmni);
printf("\tsemmns: %6d\t(# of semaphores in system)\n",
seminfo.semmns);
printf("\tsemmnu: %6d\t(# of undo structures in system)\n",
seminfo.semmnu);
printf("\tsemmsl: %6d\t(max # of semaphores per id)\n",
seminfo.semmsl);
printf("\tsemopm: %6d\t(max # of operations per semop call)\n",
seminfo.semopm);
printf("\tsemume: %6d\t(max # of undo entries per process)\n",
seminfo.semume);
printf("\tsemusz: %6d\t(size in bytes of undo structure)\n",
seminfo.semusz);
printf("\tsemvmx: %6d\t(semaphore maximum value)\n",
seminfo.semvmx);
printf("\tsemaem: %6d\t(adjust on exit max value)\n\n",
seminfo.semaem);
}
if (display & SEMINFO) {
if (semconfig(SEM_CONFIG_FREEZE) != 0) {
perror("semconfig");
fprintf(stderr,
"Can't lock semaphore facility - winging it...\n");
}
kvm_read(kd, symbols[X_SEMA].n_value, &sema, sizeof(sema));
xsema = malloc(sizeof(struct semid_ds) * seminfo.semmni);
kvm_read(kd, (u_long) sema, xsema, sizeof(struct semid_ds) * seminfo.semmni);
printf("Semaphores:\n");
printf("T ID KEY MODE OWNER GROUP");
if (option & CREATOR)
printf(" CREATOR CGROUP");
if (option & BIGGEST)
printf(" NSEMS");
if (option & TIME)
printf(" OTIME CTIME");
printf("\n");
for (i = 0; i < seminfo.semmni; i += 1) {
if ((xsema[i].sem_perm.mode & SEM_ALLOC) != 0) {
char ctime_buf[100], otime_buf[100];
struct semid_ds *semaptr = &xsema[i];
int j, value;
union semun junk;
cvt_time(semaptr->sem_otime, otime_buf);
cvt_time(semaptr->sem_ctime, ctime_buf);
printf("s %6d %10d %s %8s %8s",
IXSEQ_TO_IPCID(i, semaptr->sem_perm),
semaptr->sem_perm.key,
fmt_perm(semaptr->sem_perm.mode),
user_from_uid(semaptr->sem_perm.uid, 0),
group_from_gid(semaptr->sem_perm.gid, 0));
if (option & CREATOR)
printf(" %8s %8s",
user_from_uid(semaptr->sem_perm.cuid, 0),
group_from_gid(semaptr->sem_perm.cgid, 0));
if (option & BIGGEST)
printf(" %6d",
semaptr->sem_nsems);
if (option & TIME)
printf("%s %s",
otime_buf,
ctime_buf);
printf("\n");
}
}
(void) semconfig(SEM_CONFIG_THAW);
printf("\n");
}
} else
if (display & (SEMINFO | SEMTOTAL)) {
fprintf(stderr, "SVID semaphores facility not configured in the system\n");
}
kvm_close(kd);
exit(0);
}
void
usage()
{
fprintf(stderr,
"usage: ipcs [-abcmopqst] [-C corefile] [-N namelist]\n");
exit(1);
}
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