#include <sys/types.h>
#include <sys/sysctl.h>
#define _KERNEL
#include <sys/ipc.h>
#include <sys/sem.h>
#include <sys/shm.h>
#include <sys/msg.h>
#undef _KERNEL
#include <err.h>
#include <fcntl.h>
#include <grp.h>
#include <kvm.h>
#include <limits.h>
#include <nlist.h>
#include <paths.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
void cvt_time(time_t, char *, size_t);
char *fmt_perm(mode_t);
void ipcs_kvm(void);
int main(int, char **);
void msg_sysctl(void);
void sem_sysctl(void);
void shm_sysctl(void);
void show_msginfo(time_t, time_t, time_t, int, key_t, mode_t, uid_t,
gid_t, uid_t, gid_t, u_long, u_long, u_long, pid_t, pid_t);
void show_msginfo_hdr(void);
void show_msgtotal(struct msginfo *);
void show_seminfo_hdr(void);
void show_seminfo(time_t, time_t, int, key_t, mode_t, uid_t, gid_t,
uid_t, gid_t, int16_t);
void show_semtotal(struct seminfo *);
void show_shminfo(time_t, time_t, time_t, int, key_t, mode_t, uid_t,
gid_t, uid_t, gid_t, u_int32_t, int, pid_t, pid_t);
void show_shminfo_hdr(void);
void show_shmtotal(struct shminfo *);
__dead void usage(void);
char *
fmt_perm(mode_t mode)
{
static char buffer[12];
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, size_t buflen)
{
struct tm *tm;
if (t == 0)
(void)strlcpy(buf, "no-entry", buflen);
else {
tm = localtime(&t);
(void)snprintf(buf, buflen, "%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
char *core = NULL, *namelist = NULL;
int display = SHMINFO | MSGINFO | SEMINFO;
int option = 0;
int
main(int argc, char **argv)
{
int ch;
while ((ch = getopt(argc, argv, "MmQqSsabC:cN:optT")) != -1)
switch (ch) {
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();
}
if (argc - optind > 0)
usage();
if (namelist == NULL && core == NULL) {
if (display & (MSGINFO | MSGTOTAL))
msg_sysctl();
if (display & (SHMINFO | SHMTOTAL))
shm_sysctl();
if (display & (SEMINFO | SEMTOTAL))
sem_sysctl();
} else
ipcs_kvm();
exit(0);
}
void
show_msgtotal(struct msginfo *msginfo)
{
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);
}
void
show_shmtotal(struct shminfo *shminfo)
{
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);
}
void
show_semtotal(struct seminfo *seminfo)
{
printf("seminfo:\n");
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);
}
void
show_msginfo_hdr(void)
{
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");
}
void
show_msginfo(time_t stime, time_t rtime, time_t ctime, int ipcid, key_t key,
mode_t mode, uid_t uid, gid_t gid, uid_t cuid, gid_t cgid,
u_long cbytes, u_long qnum, u_long qbytes, pid_t lspid,
pid_t lrpid)
{
char stime_buf[100], rtime_buf[100], ctime_buf[100];
if (option & TIME) {
cvt_time(stime, stime_buf, sizeof(stime_buf));
cvt_time(rtime, rtime_buf, sizeof(rtime_buf));
cvt_time(ctime, ctime_buf, sizeof(ctime_buf));
}
printf("q %8d %10ld %s %8s %8s", ipcid, key, fmt_perm(mode),
user_from_uid(uid, 0), group_from_gid(gid, 0));
if (option & CREATOR)
printf(" %8s %8s", user_from_uid(cuid, 0),
group_from_gid(cgid, 0));
if (option & OUTSTANDING)
printf(" %6lu %5lu", cbytes, qnum);
if (option & BIGGEST)
printf(" %6lu", qbytes);
if (option & PID)
printf(" %5ld %5ld", (long)lspid, (long)lrpid);
if (option & TIME)
printf(" %s %s %s", stime_buf, rtime_buf, ctime_buf);
printf("\n");
}
void
show_shminfo_hdr(void)
{
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");
}
void
show_shminfo(time_t atime, time_t dtime, time_t ctime, int ipcid, key_t key,
mode_t mode, uid_t uid, gid_t gid, uid_t cuid, gid_t cgid,
u_int32_t nattch, int segsz, pid_t cpid, pid_t lpid)
{
char atime_buf[100], dtime_buf[100], ctime_buf[100];
if (option & TIME) {
cvt_time(atime, atime_buf, sizeof(atime_buf));
cvt_time(dtime, dtime_buf, sizeof(dtime_buf));
cvt_time(ctime, ctime_buf, sizeof(ctime_buf));
}
printf("m %8d %10ld %s %8s %8s", ipcid, key, fmt_perm(mode),
user_from_uid(uid, 0), group_from_gid(gid, 0));
if (option & CREATOR)
printf(" %8s %8s", user_from_uid(cuid, 0),
group_from_gid(cgid, 0));
if (option & OUTSTANDING)
printf(" %6d", nattch);
if (option & BIGGEST)
printf(" %7d", segsz);
if (option & PID)
printf(" %5d %5d", cpid, lpid);
if (option & TIME)
printf(" %s %s %s",
atime_buf,
dtime_buf,
ctime_buf);
printf("\n");
}
void
show_seminfo_hdr(void)
{
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");
}
void
show_seminfo(time_t otime, time_t ctime, int ipcid, key_t key, mode_t mode,
uid_t uid, gid_t gid, uid_t cuid, gid_t cgid, int16_t nsems)
{
char ctime_buf[100], otime_buf[100];
if (option & TIME) {
cvt_time(otime, otime_buf, sizeof(otime_buf));
cvt_time(ctime, ctime_buf, sizeof(ctime_buf));
}
printf("s %8d %10ld %s %8s %8s", ipcid, key, fmt_perm(mode),
user_from_uid(uid, 0), group_from_gid(gid, 0));
if (option & CREATOR)
printf(" %8s %8s", user_from_uid(cuid, 0),
group_from_gid(cgid, 0));
if (option & BIGGEST)
printf(" %5d", nsems);
if (option & TIME)
printf(" %s %s", otime_buf, ctime_buf);
printf("\n");
}
void
msg_sysctl(void)
{
struct msg_sysctl_info *msgsi;
char *buf;
int mib[3];
size_t len;
int i, valid;
mib[0] = CTL_KERN;
mib[1] = KERN_SYSVMSG;
len = sizeof(valid);
if (sysctl(mib, 2, &valid, &len, NULL, 0) == -1) {
warn("sysctl(KERN_SYSVMSG)");
return;
}
if (!valid) {
warnx("SVID messages facility not configured in the system");
return;
}
mib[0] = CTL_KERN;
mib[1] = KERN_SYSVIPC_INFO;
mib[2] = KERN_SYSVIPC_MSG_INFO;
if (!(display & MSGINFO)) {
len = sizeof(struct msginfo);
} else {
if (sysctl(mib, 3, NULL, &len, NULL, 0) == -1) {
warn("sysctl(KERN_SYSVIPC_MSG_INFO)");
return;
}
}
if ((buf = malloc(len)) == NULL)
err(1, "malloc");
msgsi = (struct msg_sysctl_info *)buf;
if (sysctl(mib, 3, msgsi, &len, NULL, 0) == -1) {
warn("sysctl(KERN_SYSVIPC_MSG_INFO)");
return;
}
if (display & MSGTOTAL)
show_msgtotal(&msgsi->msginfo);
if (display & MSGINFO) {
show_msginfo_hdr();
for (i = 0; i < msgsi->msginfo.msgmni; i++) {
struct msqid_ds *msqptr = &msgsi->msgids[i];
if (msqptr->msg_qbytes != 0)
show_msginfo(msqptr->msg_stime,
msqptr->msg_rtime,
msqptr->msg_ctime,
IXSEQ_TO_IPCID(i, msqptr->msg_perm),
msqptr->msg_perm.key,
msqptr->msg_perm.mode,
msqptr->msg_perm.uid,
msqptr->msg_perm.gid,
msqptr->msg_perm.cuid,
msqptr->msg_perm.cgid,
msqptr->msg_cbytes,
msqptr->msg_qnum,
msqptr->msg_qbytes,
msqptr->msg_lspid,
msqptr->msg_lrpid);
}
printf("\n");
}
}
void
shm_sysctl(void)
{
struct shm_sysctl_info *shmsi;
char *buf;
int mib[3];
size_t len;
int i, valid;
mib[0] = CTL_KERN;
mib[1] = KERN_SYSVSHM;
len = sizeof(valid);
if (sysctl(mib, 2, &valid, &len, NULL, 0) == -1) {
warn("sysctl(KERN_SYSVSHM)");
return;
}
if (!valid) {
warnx("SVID shared memory facility not configured in "
"the system");
return;
}
mib[0] = CTL_KERN;
mib[1] = KERN_SYSVIPC_INFO;
mib[2] = KERN_SYSVIPC_SHM_INFO;
if (!(display & SHMINFO)) {
len = sizeof(struct shminfo);
} else {
if (sysctl(mib, 3, NULL, &len, NULL, 0) == -1) {
warn("sysctl(KERN_SYSVIPC_SHM_INFO)");
return;
}
}
if ((buf = malloc(len)) == NULL)
err(1, "malloc");
shmsi = (struct shm_sysctl_info *)buf;
if (sysctl(mib, 3, shmsi, &len, NULL, 0) == -1) {
warn("sysctl(KERN_SYSVIPC_SHM_INFO)");
return;
}
if (display & SHMTOTAL)
show_shmtotal(&shmsi->shminfo);
if (display & SHMINFO) {
show_shminfo_hdr();
for (i = 0; i < shmsi->shminfo.shmmni; i++) {
struct shmid_ds *shmptr = &shmsi->shmids[i];
if (shmptr->shm_internal)
show_shminfo(shmptr->shm_atime,
shmptr->shm_dtime,
shmptr->shm_ctime,
IXSEQ_TO_IPCID(i, shmptr->shm_perm),
shmptr->shm_perm.key,
shmptr->shm_perm.mode,
shmptr->shm_perm.uid,
shmptr->shm_perm.gid,
shmptr->shm_perm.cuid,
shmptr->shm_perm.cgid,
shmptr->shm_nattch,
shmptr->shm_segsz,
shmptr->shm_cpid,
shmptr->shm_lpid);
}
printf("\n");
}
}
void
sem_sysctl(void)
{
struct sem_sysctl_info *semsi;
char *buf;
int mib[3];
size_t len;
int i, valid;
mib[0] = CTL_KERN;
mib[1] = KERN_SYSVSEM;
len = sizeof(valid);
if (sysctl(mib, 2, &valid, &len, NULL, 0) == -1) {
warn("sysctl(KERN_SYSVSEM)");
return;
}
if (!valid) {
warnx("SVID shared memory facility not configured in "
"the system");
return;
}
mib[0] = CTL_KERN;
mib[1] = KERN_SYSVIPC_INFO;
mib[2] = KERN_SYSVIPC_SEM_INFO;
if (!(display & SEMINFO)) {
len = sizeof(struct seminfo);
} else {
if (sysctl(mib, 3, NULL, &len, NULL, 0) == -1) {
warn("sysctl(KERN_SYSVIPC_SEM_INFO)");
return;
}
}
if ((buf = malloc(len)) == NULL)
err(1, "malloc");
semsi = (struct sem_sysctl_info *)buf;
if (sysctl(mib, 3, semsi, &len, NULL, 0) == -1) {
warn("sysctl(KERN_SYSVIPC_SEM_INFO)");
return;
}
if (display & SEMTOTAL)
show_semtotal(&semsi->seminfo);
if (display & SEMINFO) {
show_seminfo_hdr();
for (i = 0; i < semsi->seminfo.semmni; i++) {
struct semid_ds *semaptr = &semsi->semids[i];
if (semaptr->sem_base != NULL)
show_seminfo(semaptr->sem_otime,
semaptr->sem_ctime,
IXSEQ_TO_IPCID(i, semaptr->sem_perm),
semaptr->sem_perm.key,
semaptr->sem_perm.mode,
semaptr->sem_perm.uid,
semaptr->sem_perm.gid,
semaptr->sem_perm.cuid,
semaptr->sem_perm.cgid,
semaptr->sem_nsems);
}
printf("\n");
}
}
void
ipcs_kvm(void)
{
struct msginfo msginfo;
struct que msgque;
struct msqid_ds *msqids;
struct seminfo seminfo;
struct semid_ds sem, **sema;
struct shminfo shminfo;
struct shmid_ds shmseg, **shmsegs;
char errbuf[_POSIX2_LINE_MAX];
u_long addr;
kvm_t *kd;
int i;
struct nlist symbols[] = {
{"_sema"},
#define X_SEMA 0
{"_seminfo"},
#define X_SEMINFO 1
{"_semu"},
#define X_SEMU 2
{"_msginfo"},
#define X_MSGINFO 3
{"_msg_queues"},
#define X_MSG_QUEUES 4
{"_shminfo"},
#define X_SHMINFO 5
{"_shmsegs"},
#define X_SHMSEGS 6
{NULL}
};
if ((kd = kvm_openfiles(namelist, core, NULL, O_RDONLY,
errbuf)) == NULL)
errx(1, "can't open kvm: %s", errbuf);
switch (kvm_nlist(kd, symbols)) {
case 0:
break;
case -1:
errx(1, "%s: unable to read symbol table.",
namelist == NULL ? _PATH_UNIX : namelist);
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)
show_msgtotal(&msginfo);
if (display & MSGINFO) {
if (kvm_read(kd, symbols[X_MSG_QUEUES].n_value,
&addr, sizeof(addr)) != sizeof(addr))
errx(1, "kvm_read (%s): %s",
symbols[X_MSG_QUEUES].n_name,
kvm_geterr(kd));
msqids = calloc(sizeof(struct msqid_ds),
msginfo.msgmni);
if (msqids == NULL)
err(1, "calloc");
while (addr != 0) {
if (kvm_read(kd, addr, &msgque, sizeof(msgque))
!= sizeof(msgque))
errx(1, "kvm_read (%s): %s",
"msg que", kvm_geterr(kd));
msqids[msgque.que_ix] = msgque.msqid_ds;
addr = (u_long)TAILQ_NEXT(&msgque, que_next);
}
show_msginfo_hdr();
for (i = 0; i < msginfo.msgmni; i++) {
struct msqid_ds *msqptr = &msqids[i];
if (msqptr->msg_qbytes != 0)
show_msginfo(msqptr->msg_stime,
msqptr->msg_rtime,
msqptr->msg_ctime,
IXSEQ_TO_IPCID(i, msqptr->msg_perm),
msqptr->msg_perm.key,
msqptr->msg_perm.mode,
msqptr->msg_perm.uid,
msqptr->msg_perm.gid,
msqptr->msg_perm.cuid,
msqptr->msg_perm.cgid,
msqptr->msg_cbytes,
msqptr->msg_qnum,
msqptr->msg_qbytes,
msqptr->msg_lspid,
msqptr->msg_lrpid);
}
printf("\n");
}
} else {
if (display & (MSGINFO | MSGTOTAL)) {
warnx("SVID messages facility not configured in "
"the system");
}
}
if ((display & (SHMINFO | SHMTOTAL)) &&
(kvm_read(kd, symbols[X_SHMINFO].n_value, &shminfo,
sizeof(shminfo)) == sizeof(shminfo))) {
if (display & SHMTOTAL)
show_shmtotal(&shminfo);
if (display & SHMINFO) {
if (kvm_read(kd, symbols[X_SHMSEGS].n_value, &addr,
sizeof(addr)) != sizeof(addr))
errx(1, "kvm_read (%s): %s",
symbols[X_SHMSEGS].n_name, kvm_geterr(kd));
shmsegs = calloc(sizeof(struct shmid_ds *),
shminfo.shmmni);
if (shmsegs == NULL)
err(1, "calloc");
if (kvm_read(kd, addr, shmsegs,
sizeof(struct shmid_ds *) * shminfo.shmmni) !=
sizeof(struct shmid_ds *) * shminfo.shmmni)
errx(1, "kvm_read (shmsegs): %s",
kvm_geterr(kd));
show_shminfo_hdr();
for (i = 0; i < shminfo.shmmni; i++) {
if (shmsegs[i] == NULL)
continue;
if (kvm_read(kd, (u_long)shmsegs[i], &shmseg,
sizeof(shmseg)) != sizeof(shmseg))
errx(1, "kvm_read (shmseg): %s",
kvm_geterr(kd));
show_shminfo(shmseg.shm_atime,
shmseg.shm_dtime,
shmseg.shm_ctime,
IXSEQ_TO_IPCID(i, shmseg.shm_perm),
shmseg.shm_perm.key,
shmseg.shm_perm.mode,
shmseg.shm_perm.uid,
shmseg.shm_perm.gid,
shmseg.shm_perm.cuid,
shmseg.shm_perm.cgid,
shmseg.shm_nattch,
shmseg.shm_segsz,
shmseg.shm_cpid,
shmseg.shm_lpid);
}
printf("\n");
}
} else
if (display & (SHMINFO | SHMTOTAL)) {
warnx("SVID shared memory facility not configured in "
"the system");
}
if ((display & (SEMINFO | SEMTOTAL)) &&
(kvm_read(kd, symbols[X_SEMINFO].n_value, &seminfo,
sizeof(seminfo)) == sizeof(seminfo))) {
if (display & SEMTOTAL)
show_semtotal(&seminfo);
if (display & SEMINFO) {
if (kvm_read(kd, symbols[X_SEMA].n_value, &addr,
sizeof(addr)) != sizeof(addr))
errx(1, "kvm_read (%s): %s",
symbols[X_SEMA].n_name, kvm_geterr(kd));
sema = calloc(sizeof(struct semid_ds *),
seminfo.semmni);
if (sema == NULL)
err(1, "calloc");
if (kvm_read(kd, addr, sema,
sizeof(struct semid_ds *) * seminfo.semmni) !=
sizeof(struct semid_ds *) * seminfo.semmni)
errx(1, "kvm_read (sema): %s",
kvm_geterr(kd));
show_seminfo_hdr();
for (i = 0; i < seminfo.semmni; i++) {
if (sema[i] == NULL)
continue;
if (kvm_read(kd, (u_long)sema[i], &sem,
sizeof(sem)) != sizeof(sem))
errx(1, "kvm_read (sem): %s",
kvm_geterr(kd));
show_seminfo(sem.sem_otime,
sem.sem_ctime,
IXSEQ_TO_IPCID(i, sem.sem_perm),
sem.sem_perm.key,
sem.sem_perm.mode,
sem.sem_perm.uid,
sem.sem_perm.gid,
sem.sem_perm.cuid,
sem.sem_perm.cgid,
sem.sem_nsems);
}
printf("\n");
}
} else
if (display & (SEMINFO | SEMTOTAL)) {
warnx("SVID semaphores facility not configured in "
"the system");
}
kvm_close(kd);
}
void
usage(void)
{
extern char *__progname;
fprintf(stderr,
"usage: %s [-abcMmopQqSsTt] [-C core] [-N system]\n",
__progname);
exit(1);
}
