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freebsd/usr.bin/ipcs/ipcs.c
Christian S.J. Peron 9baea4b4b4 Change the data type of the upper shared memory limits from a signed 
integer to an unsigned long. This lifts variables like the maximum
number of pages available for shared memory from 2^31 to 2^32 on 32
bit architectures, and from 2^31 to 2^64 on 64 bit architectures.

It should be noted that this changes breaks ABI on 64 bit architectures
because the size of the shmmax, shmmin, shmmni, shmseg and shmall members
of the shminfo structure has changed.

Silence on:	current@
2005-08-06 07:20:18 +00:00

683 lines
18 KiB
C
Raw Blame History

/*
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <assert.h>
#include <err.h>
#include <fcntl.h>
#include <grp.h>
#include <kvm.h>
#include <nlist.h>
#include <limits.h>
#include <paths.h>
#include <pwd.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/proc.h>
#include <sys/sysctl.h>
#define _KERNEL
#include <sys/ipc.h>
#include <sys/sem.h>
#include <sys/shm.h>
#include <sys/msg.h>
/* SysCtlGatherStruct structure. */
struct scgs_vector {
const char *sysctl;
off_t offset;
size_t size;
};
int use_sysctl = 1;
struct semid_kernel *sema;
struct seminfo seminfo;
struct msginfo msginfo;
struct msqid_kernel *msqids;
struct shminfo shminfo;
struct shmid_kernel *shmsegs;
char *fmt_perm(u_short);
void cvt_time(time_t, char *);
void sysctlgatherstruct(void *addr, size_t size, struct scgs_vector *vec);
void kget(int idx, void *addr, size_t size);
void usage(void);
uid_t user2uid(char *username);
static struct nlist symbols[] = {
{"sema"},
#define X_SEMA 0
{"seminfo"},
#define X_SEMINFO 1
{"msginfo"},
#define X_MSGINFO 2
{"msqids"},
#define X_MSQIDS 3
{"shminfo"},
#define X_SHMINFO 4
{"shmsegs"},
#define X_SHMSEGS 5
{NULL}
};
#define SHMINFO_XVEC \
X(shmmax, sizeof(u_long)) \
X(shmmin, sizeof(u_long)) \
X(shmmni, sizeof(u_long)) \
X(shmseg, sizeof(u_long)) \
X(shmall, sizeof(u_long))
#define SEMINFO_XVEC \
X(semmap, sizeof(int)) \
X(semmni, sizeof(int)) \
X(semmns, sizeof(int)) \
X(semmnu, sizeof(int)) \
X(semmsl, sizeof(int)) \
X(semopm, sizeof(int)) \
X(semume, sizeof(int)) \
X(semusz, sizeof(int)) \
X(semvmx, sizeof(int)) \
X(semaem, sizeof(int))
#define MSGINFO_XVEC \
X(msgmax, sizeof(int)) \
X(msgmni, sizeof(int)) \
X(msgmnb, sizeof(int)) \
X(msgtql, sizeof(int)) \
X(msgssz, sizeof(int)) \
X(msgseg, sizeof(int))
#define X(a, b) { "kern.ipc." #a, offsetof(TYPEC, a), (b) },
#define TYPEC struct shminfo
struct scgs_vector shminfo_scgsv[] = { SHMINFO_XVEC { NULL } };
#undef TYPEC
#define TYPEC struct seminfo
struct scgs_vector seminfo_scgsv[] = { SEMINFO_XVEC { NULL } };
#undef TYPEC
#define TYPEC struct msginfo
struct scgs_vector msginfo_scgsv[] = { MSGINFO_XVEC { NULL } };
#undef TYPEC
#undef X
static kvm_t *kd;
char *
fmt_perm(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(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(int argc, char *argv[])
{
int display = SHMINFO | MSGINFO | SEMINFO;
int option = 0;
char *core = NULL, *user = NULL, *namelist = NULL;
char kvmoferr[_POSIX2_LINE_MAX]; /* Error buf for kvm_openfiles. */
int i;
uid_t uid;
while ((i = getopt(argc, argv, "MmQqSsabC:cN:optTu:y")) != -1)
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;
case 'y':
use_sysctl = 0;
break;
case 'u':
user = optarg;
uid = user2uid(user);
break;
default:
usage();
}
/*
* If paths to the exec file or core file were specified, we
* aren't operating on the running kernel, so we can't use
* sysctl.
*/
if (namelist != NULL || core != NULL)
use_sysctl = 0;
if (!use_sysctl) {
kd = kvm_openfiles(namelist, core, NULL, O_RDONLY, kvmoferr);
if (kd == NULL)
errx(1, "kvm_openfiles: %s", kvmoferr);
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);
#endif
break;
}
}
kget(X_MSGINFO, &msginfo, sizeof(msginfo));
if ((display & (MSGINFO | MSGTOTAL))) {
if (display & MSGTOTAL) {
printf("msginfo:\n");
printf("\tmsgmax: %12d\t(max characters in a message)\n",
msginfo.msgmax);
printf("\tmsgmni: %12d\t(# of message queues)\n",
msginfo.msgmni);
printf("\tmsgmnb: %12d\t(max characters in a message queue)\n",
msginfo.msgmnb);
printf("\tmsgtql: %12d\t(max # of messages in system)\n",
msginfo.msgtql);
printf("\tmsgssz: %12d\t(size of a message segment)\n",
msginfo.msgssz);
printf("\tmsgseg: %12d\t(# of message segments in system)\n\n",
msginfo.msgseg);
}
if (display & MSGINFO) {
struct msqid_kernel *kxmsqids;
size_t kxmsqids_len;
kxmsqids_len = sizeof(struct msqid_kernel) * msginfo.msgmni;
kxmsqids = malloc(kxmsqids_len);
kget(X_MSQIDS, kxmsqids, kxmsqids_len);
printf("Message Queues:\n");
printf("T %12s %12s %-11s %-8s %-8s", "ID", "KEY", "MODE",
"OWNER", "GROUP");
if (option & CREATOR)
printf(" %-8s %-8s", "CREATOR", "CGROUP");
if (option & OUTSTANDING)
printf(" %20s %20s", "CBYTES", "QNUM");
if (option & BIGGEST)
printf(" %20s", "QBYTES");
if (option & PID)
printf(" %12s %12s", "LSPID", "LRPID");
if (option & TIME)
printf(" %-8s %-8s %-8s", "STIME", "RTIME", "CTIME");
printf("\n");
for (i = 0; i < msginfo.msgmni; i += 1) {
if (kxmsqids[i].u.msg_qbytes != 0) {
char stime_buf[100], rtime_buf[100],
ctime_buf[100];
struct msqid_kernel *kmsqptr = &kxmsqids[i];
if (user)
if (uid != kmsqptr->u.msg_perm.uid)
continue;
cvt_time(kmsqptr->u.msg_stime, stime_buf);
cvt_time(kmsqptr->u.msg_rtime, rtime_buf);
cvt_time(kmsqptr->u.msg_ctime, ctime_buf);
printf("q %12d %12d %s %8s %8s",
IXSEQ_TO_IPCID(i, kmsqptr->u.msg_perm),
(int)kmsqptr->u.msg_perm.key,
fmt_perm(kmsqptr->u.msg_perm.mode),
user_from_uid(kmsqptr->u.msg_perm.uid, 0),
group_from_gid(kmsqptr->u.msg_perm.gid, 0));
if (option & CREATOR)
printf(" %8s %8s",
user_from_uid(kmsqptr->u.msg_perm.cuid, 0),
group_from_gid(kmsqptr->u.msg_perm.cgid, 0));
if (option & OUTSTANDING)
printf(" %12lu %12lu",
kmsqptr->u.msg_cbytes,
kmsqptr->u.msg_qnum);
if (option & BIGGEST)
printf(" %20lu",
kmsqptr->u.msg_qbytes);
if (option & PID)
printf(" %12d %12d",
kmsqptr->u.msg_lspid,
kmsqptr->u.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");
}
kget(X_SHMINFO, &shminfo, sizeof(shminfo));
if ((display & (SHMINFO | SHMTOTAL))) {
if (display & SHMTOTAL) {
printf("shminfo:\n");
printf("\tshmmax: %12d\t(max shared memory segment size)\n",
shminfo.shmmax);
printf("\tshmmin: %12d\t(min shared memory segment size)\n",
shminfo.shmmin);
printf("\tshmmni: %12d\t(max number of shared memory identifiers)\n",
shminfo.shmmni);
printf("\tshmseg: %12d\t(max shared memory segments per process)\n",
shminfo.shmseg);
printf("\tshmall: %12d\t(max amount of shared memory in pages)\n\n",
shminfo.shmall);
}
if (display & SHMINFO) {
struct shmid_kernel *kxshmids;
size_t kxshmids_len;
kxshmids_len = sizeof(struct shmid_kernel) * shminfo.shmmni;
kxshmids = malloc(kxshmids_len);
kget(X_SHMSEGS, kxshmids, kxshmids_len);
printf("Shared Memory:\n");
printf("T %12s %12s %-11s %-8s %-8s", "ID", "KEY", "MODE",
"OWNER", "GROUP");
if (option & CREATOR)
printf(" %-8s %-8s", "CREATOR", "CGROUP");
if (option & OUTSTANDING)
printf(" %12s", "NATTCH");
if (option & BIGGEST)
printf(" %12s", "SEGSZ");
if (option & PID)
printf(" %12s %12s", "CPID", "LPID");
if (option & TIME)
printf(" %-8s %-8s %-8s", "ATIME", "DTIME", "CTIME");
printf("\n");
for (i = 0; i < shminfo.shmmni; i += 1) {
if (kxshmids[i].u.shm_perm.mode & 0x0800) {
char atime_buf[100], dtime_buf[100],
ctime_buf[100];
struct shmid_kernel *kshmptr = &kxshmids[i];
if (user)
if (uid != kshmptr->u.shm_perm.uid)
continue;
cvt_time(kshmptr->u.shm_atime, atime_buf);
cvt_time(kshmptr->u.shm_dtime, dtime_buf);
cvt_time(kshmptr->u.shm_ctime, ctime_buf);
printf("m %12d %12d %s %8s %8s",
IXSEQ_TO_IPCID(i, kshmptr->u.shm_perm),
(int)kshmptr->u.shm_perm.key,
fmt_perm(kshmptr->u.shm_perm.mode),
user_from_uid(kshmptr->u.shm_perm.uid, 0),
group_from_gid(kshmptr->u.shm_perm.gid, 0));
if (option & CREATOR)
printf(" %8s %8s",
user_from_uid(kshmptr->u.shm_perm.cuid, 0),
group_from_gid(kshmptr->u.shm_perm.cgid, 0));
if (option & OUTSTANDING)
printf(" %12d",
kshmptr->u.shm_nattch);
if (option & BIGGEST)
printf(" %12d",
kshmptr->u.shm_segsz);
if (option & PID)
printf(" %12d %12d",
kshmptr->u.shm_cpid,
kshmptr->u.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");
}
kget(X_SEMINFO, &seminfo, sizeof(seminfo));
if ((display & (SEMINFO | SEMTOTAL))) {
struct semid_kernel *kxsema;
size_t kxsema_len;
if (display & SEMTOTAL) {
printf("seminfo:\n");
printf("\tsemmap: %12d\t(# of entries in semaphore map)\n",
seminfo.semmap);
printf("\tsemmni: %12d\t(# of semaphore identifiers)\n",
seminfo.semmni);
printf("\tsemmns: %12d\t(# of semaphores in system)\n",
seminfo.semmns);
printf("\tsemmnu: %12d\t(# of undo structures in system)\n",
seminfo.semmnu);
printf("\tsemmsl: %12d\t(max # of semaphores per id)\n",
seminfo.semmsl);
printf("\tsemopm: %12d\t(max # of operations per semop call)\n",
seminfo.semopm);
printf("\tsemume: %12d\t(max # of undo entries per process)\n",
seminfo.semume);
printf("\tsemusz: %12d\t(size in bytes of undo structure)\n",
seminfo.semusz);
printf("\tsemvmx: %12d\t(semaphore maximum value)\n",
seminfo.semvmx);
printf("\tsemaem: %12d\t(adjust on exit max value)\n\n",
seminfo.semaem);
}
if (display & SEMINFO) {
kxsema_len = sizeof(struct semid_kernel) * seminfo.semmni;
kxsema = malloc(kxsema_len);
kget(X_SEMA, kxsema, kxsema_len);
printf("Semaphores:\n");
printf("T %12s %12s %-11s %-8s %-8s", "ID", "KEY", "MODE",
"OWNER", "GROUP");
if (option & CREATOR)
printf(" %-8s %-8s", "CREATOR", "CGROUP");
if (option & BIGGEST)
printf(" %12s", "NSEMS");
if (option & TIME)
printf(" %-8s %-8s", "OTIME", "CTIME");
printf("\n");
for (i = 0; i < seminfo.semmni; i += 1) {
if ((kxsema[i].u.sem_perm.mode & SEM_ALLOC) != 0) {
char ctime_buf[100], otime_buf[100];
struct semid_kernel *ksemaptr = &kxsema[i];
if (user)
if (uid != ksemaptr->u.sem_perm.uid)
continue;
cvt_time(ksemaptr->u.sem_otime, otime_buf);
cvt_time(ksemaptr->u.sem_ctime, ctime_buf);
printf("s %12d %12d %s %8s %8s",
IXSEQ_TO_IPCID(i, ksemaptr->u.sem_perm),
(int)ksemaptr->u.sem_perm.key,
fmt_perm(ksemaptr->u.sem_perm.mode),
user_from_uid(ksemaptr->u.sem_perm.uid, 0),
group_from_gid(ksemaptr->u.sem_perm.gid, 0));
if (option & CREATOR)
printf(" %8s %8s",
user_from_uid(ksemaptr->u.sem_perm.cuid, 0),
group_from_gid(ksemaptr->u.sem_perm.cgid, 0));
if (option & BIGGEST)
printf(" %12d",
ksemaptr->u.sem_nsems);
if (option & TIME)
printf(" %s %s",
otime_buf,
ctime_buf);
printf("\n");
}
}
printf("\n");
}
} else
if (display & (SEMINFO | SEMTOTAL)) {
fprintf(stderr, "SVID semaphores facility not configured in the system\n");
}
if (!use_sysctl)
kvm_close(kd);
exit(0);
}
void
sysctlgatherstruct(void *addr, size_t size, struct scgs_vector *vecarr)
{
struct scgs_vector *xp;
size_t tsiz;
int rv;
for (xp = vecarr; xp->sysctl != NULL; xp++) {
assert(xp->offset <= size);
tsiz = xp->size;
rv = sysctlbyname(xp->sysctl, (char *)addr + xp->offset,
&tsiz, NULL, 0);
if (rv == -1)
err(1, "sysctlbyname: %s", xp->sysctl);
if (tsiz != xp->size)
errx(1, "%s size mismatch (expected %d, got %d)",
xp->sysctl, xp->size, tsiz);
}
}
void
kget(int idx, void *addr, size_t size)
{
char *symn; /* symbol name */
size_t tsiz;
int rv;
unsigned long kaddr;
const char *sym2sysctl[] = { /* symbol to sysctl name table */
"kern.ipc.sema",
"kern.ipc.seminfo",
"kern.ipc.msginfo",
"kern.ipc.msqids",
"kern.ipc.shminfo",
"kern.ipc.shmsegs" };
assert((unsigned)idx <= sizeof(sym2sysctl) / sizeof(*sym2sysctl));
if (!use_sysctl) {
symn = symbols[idx].n_name;
if (*symn == '_')
symn++;
if (symbols[idx].n_type == 0 || symbols[idx].n_value == 0)
errx(1, "symbol %s undefined", symn);
/*
* For some symbols, the value we retreieve is
* actually a pointer; since we want the actual value,
* we have to manually dereference it.
*/
switch (idx) {
case X_MSQIDS:
tsiz = sizeof(msqids);
rv = kvm_read(kd, symbols[idx].n_value,
&msqids, tsiz);
kaddr = (u_long)msqids;
break;
case X_SHMSEGS:
tsiz = sizeof(shmsegs);
rv = kvm_read(kd, symbols[idx].n_value,
&shmsegs, tsiz);
kaddr = (u_long)shmsegs;
break;
case X_SEMA:
tsiz = sizeof(sema);
rv = kvm_read(kd, symbols[idx].n_value,
&sema, tsiz);
kaddr = (u_long)sema;
break;
default:
rv = tsiz = 0;
kaddr = symbols[idx].n_value;
break;
}
if ((unsigned)rv != tsiz)
errx(1, "%s: %s", symn, kvm_geterr(kd));
if ((unsigned)kvm_read(kd, kaddr, addr, size) != size)
errx(1, "%s: %s", symn, kvm_geterr(kd));
} else {
switch (idx) {
case X_SHMINFO:
sysctlgatherstruct(addr, size, shminfo_scgsv);
break;
case X_SEMINFO:
sysctlgatherstruct(addr, size, seminfo_scgsv);
break;
case X_MSGINFO:
sysctlgatherstruct(addr, size, msginfo_scgsv);
break;
default:
tsiz = size;
rv = sysctlbyname(sym2sysctl[idx], addr, &tsiz,
NULL, 0);
if (rv == -1)
err(1, "sysctlbyname: %s", sym2sysctl[idx]);
if (tsiz != size)
errx(1, "%s size mismatch "
"(expected %d, got %d)",
sym2sysctl[idx], size, tsiz);
break;
}
}
}
uid_t
user2uid(char *username)
{
struct passwd *pwd;
uid_t uid;
char *r;
uid = strtoul(username, &r, 0);
if (!*r && r != username)
return (uid);
if ((pwd = getpwnam(username)) == NULL)
errx(1, "getpwnam failed: No such user");
endpwent();
return (pwd->pw_uid);
}
void
usage(void)
{
fprintf(stderr,
"usage: ipcs [-abcmopqstyMQST] [-C corefile] [-N namelist] [-u user]\n");
exit(1);
}
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