NetBSD/usr.bin/ipcs/ipcs.c

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/*
* Simplified implementation of SYSV ipcs.
*
* $Id: ipcs.c,v 1.1 1993/11/14 16:17:58 cgd Exp $
*/
#include <nlist.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <paths.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/proc.h>
#define KERNEL
#include <sys/ipc.h>
#include <sys/sem.h>
#include <sys/shm.h>
#include <sys/msg.h>
static kmem_fd;
getsymbol(struct nlist * symbols, char *symname, void *dptr, int len)
{
int i, rlen;
for (i = 0; symbols[i].n_name != NULL; i += 1) {
if (strcmp(symbols[i].n_name, symname) == 0) {
break;
}
}
if (symbols[i].n_name == NULL) {
fprintf(stderr,
"ipcs(getsymbol): symbol %s not in local symbols list\n",
symname);
exit(1);
}
if (symbols[i].n_value == NULL) {
fprintf(stderr, "ipcs(getsymbol): symbol %s not in %s\n",
symname, _PATH_UNIX);
return (0);
}
if (kmem_fd == 0) {
kmem_fd = open("/dev/kmem", 0);
if (kmem_fd < 0) {
perror("ipcs(getsymbol(open /dev/kmem))");
exit(1);
}
}
lseek(kmem_fd, symbols[i].n_value, SEEK_SET);
if ((rlen = read(kmem_fd, dptr, len)) != len) {
fprintf(stderr,
"ipcs(getsymbol): can't fetch symbol %s from /dev/kmem\n",
symname);
exit(1);
}
return (1);
}
void
getlocation(void *addr, void *dptr, int len)
{
int i, rlen;
if (kmem_fd == 0) {
kmem_fd = open("/dev/kmem", 0);
if (kmem_fd < 0) {
perror("ipcs(getlocation(open /dev/kmem))");
exit(1);
}
}
lseek(kmem_fd, (long) addr, SEEK_SET);
if ((rlen = read(kmem_fd, dptr, len)) != len) {
fprintf(stderr,"ipcs(getlocation): can't fetch location %08x from /dev/kmem\n",
addr);
exit(1);
}
}
char *
fmt_perm(ushort 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 tms;
static char *months[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
if (t == 0) {
strcpy(buf, "<not set>");
}
else {
tms = *localtime(&t);
if (t > time(0) - 6 * 30 * 24 * 3600) { /* less than about 6
months ago? */
sprintf(buf, "%s %2d %2d:%2d",
months[tms.tm_mon], tms.tm_mday, tms.tm_hour,
tms.tm_min);
}
else {
sprintf(buf, "%s %2d %5d",
months[tms.tm_mon], tms.tm_mday,
tms.tm_year + 1900);
}
}
}
main()
{
static struct nlist symbols[] = {
{"_sema"},
{"_seminfo"},
{"_semu"},
{"_msginfo"},
{"_msqids"},
{NULL}
};
int i;
int show_sem_values = 1;
int show_undo_values = 1;
switch (nlist(_PATH_UNIX, &symbols[0])) {
case 0:
break;
case -1:
fprintf(stderr, "ipcs: can't open %s - bye!\n", _PATH_UNIX);
exit(1);
default:
fprintf(stderr, "ipcs: nlist failed\n");
for (i = 0; symbols[i].n_name != NULL; i += 1) {
if (symbols[i].n_value == 0) {
fprintf(stderr, "\tsymbol %s not found\n",
symbols[i].n_name);
}
}
break;
}
#ifdef notdef
for ( i = 0; symbols[i].n_name != NULL; i += 1 ) {
fprintf(stderr,"\t%s : %08x\n",symbols[i].n_name,
symbols[i].n_value);
}
#endif
if (getsymbol(symbols, "_seminfo", &seminfo, sizeof(seminfo))) {
struct semid_ds *xsema;
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",
seminfo.semaem);
/*
* Lock out other users of the semaphore facility
*/
if (semconfig(SEM_CONFIG_FREEZE) != 0) {
perror("semconfig");
fprintf(stderr,
"Can't lock semaphore facility - winging it...\n");
}
getsymbol(symbols, "_sema", &sema, sizeof(sema));
xsema = malloc(sizeof(struct semid_ds) * seminfo.semmni);
getlocation(sema, xsema, sizeof(struct semid_ds) *
seminfo.semmni);
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];
cvt_time(semaptr->sem_ctime, ctime_buf);
cvt_time(semaptr->sem_otime, otime_buf);
printf("\nsema id: %d key: 0x%08x:\n",
IXSEQ_TO_IPCID(i, semaptr->sem_perm),
semaptr->sem_perm.key);
printf(" cuid: %6d cgid: %6d ctime: %s\n",
semaptr->sem_perm.cuid,
semaptr->sem_perm.cgid, ctime_buf);
printf(" uid: %6d gid: %6d otime: %s\n",
semaptr->sem_perm.uid,
semaptr->sem_perm.gid, otime_buf);
printf(" nsems: %6d perm: %s\n",
semaptr->sem_nsems,
fmt_perm(semaptr->sem_perm.mode));
if (show_sem_values) {
int j, value;
union semun junk;
for (j = 0; j < semaptr->sem_nsems;
j += 1) {
if ((value = semctl(IXSEQ_TO_IPCID(i, semaptr->sem_perm), j, GETVAL, junk)) < 0) {
printf("can't get semaphore values\n");
break;
}
if (j % 5 == 0) {
if (j == 0) {
printf(" values: {");
}
else {
printf("\n");
printf(" ");
}
}
printf(" %d", value);
if (j == semaptr->sem_nsems - 1) {
printf(" }\n");
}
else {
printf(", ");
}
}
}
}
}
if (show_undo_values) {
int j;
int *ksemu, *semu;
int semu_size;
int got_one_undo = 0;
semu = 0;
semu_size = (int) SEMU(seminfo.semmnu);
semu = (int *) malloc(semu_size);
getsymbol(symbols, "_semu", &ksemu, sizeof(ksemu));
getlocation(ksemu, semu, semu_size);
printf("\nsem undos:\n");
for (j = 0; j < seminfo.semmnu; j += 1) {
struct sem_undo *suptr;
int k;
suptr = SEMU(j);
if (suptr->un_proc != NULL) {
struct proc proc;
getlocation(suptr->un_proc, &proc,
sizeof(proc));
got_one_undo = 1;
printf(" pid %d: semid semnum adjval\n",
proc.p_pid);
for (k = 0; k < suptr->un_cnt; k += 1) {
printf(" %10d %5d %6d\n",
IXSEQ_TO_IPCID(suptr->un_ent[k].un_id, xsema[suptr->un_ent[k].un_id].sem_perm),
suptr->un_ent[k].un_num,
suptr->un_ent[k].un_adjval);
}
}
}
if (!got_one_undo) {
printf(" none allocated\n");
}
}
(void) semconfig(SEM_CONFIG_THAW);
}
else {
fprintf(stderr, "SVID semaphores facility not configured in the system\n");
}
if (getsymbol(symbols, "_msginfo", &msginfo, sizeof(msginfo))) {
struct msqid_ds *xmsqids;
printf("\nmsginfo:\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",
msginfo.msgseg);
getsymbol(symbols, "_msqids", &msqids, sizeof(msqids));
xmsqids = malloc(sizeof(struct msqid_ds) * msginfo.msgmni);
getlocation(msqids, xmsqids, sizeof(struct msqid_ds) *
msginfo.msgmni);
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("\nmsgq id: %d key: 0x%08x\n",
IXSEQ_TO_IPCID(i, msqptr->msg_perm),
msqptr->msg_perm.key);
printf(" cuid: %6d cgid: %6d ctime: %s\n",
msqptr->msg_perm.cuid,
msqptr->msg_perm.cgid, ctime_buf);
printf(" uid: %6d gid: %6d\n",
msqptr->msg_perm.uid,
msqptr->msg_perm.gid);
printf(" lspid: %6d stime: %s\n",
msqptr->msg_lspid, stime_buf);
printf(" lrpid: %6d qnum: %6d rtime: %s\n",
msqptr->msg_lrpid, msqptr->msg_qnum,
rtime_buf);
printf(" cbytes:%6d qbytes:%6d perm: %s\n",
msqptr->msg_cbytes, msqptr->msg_qbytes,
fmt_perm(msqptr->msg_perm.mode));
}
}
}
else {
fprintf(stderr,
"SVID messages facility not configured in the system\n");
}
exit(0);
}