#define _KERNEL_STRUCTURES
#include <err.h>
#include <fcntl.h>
#include <grp.h>
#include <kvm.h>
#include <nlist.h>
#include <paths.h>
#include <pwd.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/ipc.h>
#include <sys/sem.h>
#include <sys/shm.h>
#include <sys/msg.h>
struct semid_pool *sema;
struct seminfo seminfo;
struct msginfo msginfo;
struct msqid_ds *msqids;
struct shminfo shminfo;
struct shmid_ds *shmsegs;
static void usage(void);
static uid_t user2uid(const char *);
static gid_t grp2gid(const char *);
static struct nlist symbols[] = {
{ .n_name = "_sema" },
#define X_SEMA 0
{ .n_name = "_seminfo" },
#define X_SEMINFO 1
{ .n_name = "_msginfo" },
#define X_MSGINFO 2
{ .n_name = "_msqids" },
#define X_MSQIDS 3
{ .n_name = "_shminfo" },
#define X_SHMINFO 4
{ .n_name = "_shmsegs" },
#define X_SHMSEGS 5
{ .n_name = NULL }
};
static kvm_t *kd;
static 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]);
}
static void
cvt_time(time_t t, char *buf)
{
struct tm *tm;
if (t == 0) {
strcpy(buf, "noentry");
} 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, *namelist;
char *user, *grp;
int i;
uid_t useruid = 0;
gid_t grpgid = 0;
core = namelist = NULL;
user = grp = NULL;
while ((i = getopt(argc, argv, "MmQqSsabC:cN:ou:g:ptT")) != -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 'u':
user = optarg;
grp = NULL;
useruid = user2uid(optarg);
break;
case 'g':
grp = optarg;
user = NULL;
grpgid = grp2gid(optarg);
break;
default:
usage();
}
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
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;
}
if ((display & (MSGINFO | MSGTOTAL)) &&
kvm_read(kd, symbols[X_MSGINFO].n_value, &msginfo, sizeof(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];
if (user && useruid != msqptr->msg_perm.uid)
continue;
if (grp && grpgid != msqptr->msg_perm.gid)
continue;
cvt_time(msqptr->msg_stime, stime_buf);
cvt_time(msqptr->msg_rtime, rtime_buf);
cvt_time(msqptr->msg_ctime, ctime_buf);
printf("q %6d %10ld %s %8s %8s",
IXSEQ_TO_IPCID(i, msqptr->msg_perm),
(long)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(" %6lu %6lu",
msqptr->msg_cbytes,
msqptr->msg_qnum);
if (option & BIGGEST)
printf(" %6lu",
msqptr->msg_qbytes);
if (option & PID)
printf(" %6d %6d",
(int)msqptr->msg_lspid,
(int)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: %12ld\t(max shared memory segment size)\n",
shminfo.shmmax);
printf("\tshmmin: %12ld\t(min shared memory segment size)\n",
shminfo.shmmin);
printf("\tshmmni: %12ld\t(max number of shared memory identifiers)\n",
shminfo.shmmni);
printf("\tshmseg: %12ld\t(max shared memory segments per process)\n",
shminfo.shmseg);
printf("\tshmall: %12ld\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) * shminfo.shmmni);
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];
if (user && useruid != shmptr->shm_perm.uid)
continue;
if (grp && grpgid != shmptr->shm_perm.gid)
continue;
cvt_time(shmptr->shm_atime, atime_buf);
cvt_time(shmptr->shm_dtime, dtime_buf);
cvt_time(shmptr->shm_ctime, ctime_buf);
printf("m %6d %10ld %s %8s %8s",
IXSEQ_TO_IPCID(i, shmptr->shm_perm),
(long)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(" %13zu",
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_pool *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) {
kvm_read(kd, symbols[X_SEMA].n_value, &sema, sizeof(sema));
xsema = malloc(sizeof(struct semid_pool) * seminfo.semmni);
kvm_read(kd, (u_long) sema, xsema, sizeof(struct semid_pool) * 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].ds.sem_perm.mode & SEM_ALLOC) != 0) {
char ctime_buf[100], otime_buf[100];
struct semid_ds *semaptr = &xsema[i].ds;
if (user && useruid != semaptr->sem_perm.uid)
continue;
if (grp && grpgid != semaptr->sem_perm.gid)
continue;
cvt_time(semaptr->sem_otime, otime_buf);
cvt_time(semaptr->sem_ctime, ctime_buf);
printf("s %6d %10ld %s %8s %8s",
IXSEQ_TO_IPCID(i, semaptr->sem_perm),
(long)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(" %5d",
semaptr->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");
}
kvm_close(kd);
exit(0);
}
static uid_t
user2uid(const 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, "No such user");
endpwent();
return (pwd->pw_uid);
}
static gid_t
grp2gid(const char *groupname)
{
struct group *grp;
gid_t gid;
char *r;
gid = strtol(groupname, &r, 0);
if (!*r && r != groupname)
return (gid);
if ((grp = getgrnam(groupname)) == NULL)
errx(1, "No such group");
endgrent();
return (grp->gr_gid);
}
static void
usage(void)
{
fprintf(stderr,
"usage: ipcs [-abcmopqstMQST] [-C corefile] [-N namelist] [-u user] [-g group]\n");
exit(1);
}
