/* Original author unknown, but may be "krishna balasub@cis.ohio-state.edu"
Modified Sat Oct 9 10:55:28 1993 for 0.99.13 */
/*
Patches from Mike Jagdis (jaggy@purplet.demon.co.uk) applied Wed Feb
8 12:12:21 1995 by faith@cs.unc.edu to print numeric uids if no
passwd file entry.
Patch from arnolds@ifns.de (Heinz-Ado Arnolds) applied Mon Jul 1
19:30:41 1996 by janl@math.uio.no to add code missing in case PID:
clauses.
Patched to display the key field -- hy@picksys.com 12/18/96
*/
#include <stdio.h>
#include <stdlib.h>
#include <getopt.h>
#include <errno.h>
#include <time.h>
#include <pwd.h>
#include <grp.h>
#if 0
#define __KERNEL__ /* yuk */
#include <linux/linkage.h>
#endif
/* X/OPEN tells us to use <sys/{types,ipc,sem}.h> for semctl() */
/* X/OPEN tells us to use <sys/{types,ipc,msg}.h> for msgctl() */
/* X/OPEN tells us to use <sys/{types,ipc,shm}.h> for shmctl() */
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/sem.h>
#include <sys/msg.h>
#include <sys/shm.h>
/* The last arg of semctl is a union semun, but where is it defined?
X/OPEN tells us to define it ourselves, but until recently
Linux include files would also define it. */
#if defined (__GNU_LIBRARY__) && !defined(_SEM_SEMUN_UNDEFINED)
/* union semun is defined by including <sys/sem.h> */
#else
/* according to X/OPEN we have to define it ourselves */
union semun {
int val;
struct semid_ds *buf;
unsigned short int *array;
struct seminfo *__buf;
};
#endif
/* X/OPEN (Jan 1987) does not define fields key, seq in struct ipc_perm;
libc 4/5 does not mention struct ipc_term at all, but includes
<linux/ipc.h>, which defines a struct ipc_perm with such fields.
glibc-1.09 has no support for sysv ipc.
glibc 2 uses __key, __seq */
#if defined (__GNU_LIBRARY__) && __GNU_LIBRARY__ > 1
#define KEY __key
#else
#define KEY key
#endif
#define LIMITS 1
#define STATUS 2
#define CREATOR 3
#define TIME 4
#define PID 5
void do_shm (char format);
void do_sem (char format);
void do_msg (char format);
void print_shm (int id);
void print_msg (int id);
void print_sem (int id);
static char *progname;
void usage(void)
{
printf ("usage : %s -asmq -tclup \n", progname);
printf ("\t%s [-s -m -q] -i id\n", progname);
printf ("\t%s -h for help.\n", progname);
return;
}
void help (void)
{
printf ("%s provides information on ipc facilities for", progname);
printf (" which you have read access.\n");
printf ("Resource Specification:\n\t-m : shared_mem\n\t-q : messages\n");
printf ("\t-s : semaphores\n\t-a : all (default)\n");
printf ("Output Format:\n\t-t : time\n\t-p : pid\n\t-c : creator\n");
printf ("\t-l : limits\n\t-u : summary\n");
printf ("-i id [-s -q -m] : details on resource identified by id\n");
usage();
return;
}
int main (int argc, char **argv)
{
int opt, msg = 0, sem = 0, shm = 0, id=0, print=0;
char format = 0;
char options[] = "atcluphsmqi:";
progname = argv[0];
while ((opt = getopt (argc, argv, options)) != EOF) {
switch (opt) {
case 'i':
id = atoi (optarg);
print = 1;
break;
case 'a':
msg = shm = sem = 1;
break;
case 'q':
msg = 1;
break;
case 's':
sem = 1;
break;
case 'm':
shm = 1;
break;
case 't':
format = TIME;
break;
case 'c':
format = CREATOR;
break;
case 'p':
format = PID;
break;
case 'l':
format = LIMITS;
break;
case 'u':
format = STATUS;
break;
case 'h':
help();
exit (0);
case '?':
usage();
exit (0);
}
}
if (print) {
if (shm) {
print_shm (id);
exit (0);
}
if (sem) {
print_sem (id);
exit (0);
}
if (msg) {
print_msg (id);
exit (0);
}
usage();
}
if ( !shm && !msg && !sem)
msg = sem = shm = 1;
printf ("\n");
if (shm) {
do_shm (format);
printf ("\n");
}
if (sem) {
do_sem (format);
printf ("\n");
}
if (msg) {
do_msg (format);
printf ("\n");
}
return 0;
}
void print_perms (int id, struct ipc_perm *ipcp)
{
struct passwd *pw;
struct group *gr;
printf ("%-10d%-10o", id, ipcp->mode & 0777);
if ((pw = getpwuid(ipcp->cuid)))
printf("%-10s", pw->pw_name);
else
printf("%-10d", ipcp->cuid);
if ((gr = getgrgid(ipcp->cgid)))
printf("%-10s", gr->gr_name);
else
printf("%-10d", ipcp->cgid);
if ((pw = getpwuid(ipcp->uid)))
printf("%-10s", pw->pw_name);
else
printf("%-10d", ipcp->uid);
if ((gr = getgrgid(ipcp->gid)))
printf("%-10s\n", gr->gr_name);
else
printf("%-10d\n", ipcp->gid);
}
void do_shm (char format)
{
int maxid, shmid, id;
struct shmid_ds shmseg;
struct shm_info shm_info;
struct shminfo shminfo;
struct ipc_perm *ipcp = &shmseg.shm_perm;
struct passwd *pw;
maxid = shmctl (0, SHM_INFO, (struct shmid_ds *) &shm_info);
if (maxid < 0) {
printf ("kernel not configured for shared memory\n");
return;
}
switch (format) {
case LIMITS:
printf ("------ Shared Memory Limits --------\n");
if ((shmctl (0, IPC_INFO, (struct shmid_ds *) &shminfo)) < 0 )
return;
printf ("max number of segments = %d\n", shminfo.shmmni);
printf ("max seg size (kbytes) = %d\n", shminfo.shmmax >> 10);
printf ("max total shared memory (kbytes) = %d\n", shminfo.shmall << 2);
printf ("min seg size (bytes) = %d\n", shminfo.shmmin);
return;
case STATUS:
printf ("------ Shared Memory Status --------\n");
printf ("segments allocated %d\n", shm_info.used_ids);
printf ("pages allocated %ld\n", shm_info.shm_tot);
printf ("pages resident %ld\n", shm_info.shm_rss);
printf ("pages swapped %ld\n", shm_info.shm_swp);
printf ("Swap performance: %ld attempts\t %ld successes\n",
shm_info.swap_attempts, shm_info.swap_successes);
return;
case CREATOR:
printf ("------ Shared Memory Segment Creators/Owners --------\n");
printf ("%-10s%-10s%-10s%-10s%-10s%-10s\n",
"shmid","perms","cuid","cgid","uid","gid");
break;
case TIME:
printf ("------ Shared Memory Attach/Detach/Change Times --------\n");
printf ("%-10s%-10s %-20s%-20s%-20s\n",
"shmid","owner","attached","detached","changed");
break;
case PID:
printf ("------ Shared Memory Creator/Last-op --------\n");
printf ("%-10s%-10s%-10s%-10s\n","shmid","owner","cpid","lpid");
break;
default:
printf ("------ Shared Memory Segments --------\n");
printf ("%-10s%-10s%-10s%-10s%-10s%-10s%-12s\n", "key","shmid",
"owner","perms","bytes","nattch","status");
break;
}
for (id = 0; id <= maxid; id++) {
shmid = shmctl (id, SHM_STAT, &shmseg);
if (shmid < 0)
continue;
if (format == CREATOR) {
print_perms (shmid, ipcp);
continue;
}
pw = getpwuid(ipcp->uid);
switch (format) {
case TIME:
if (pw)
printf ("%-10d%-10.10s", shmid, pw->pw_name);
else
printf ("%-10d%-10d", shmid, ipcp->uid);
printf(" %-20.16s%-20.16s%-20.16s\n",
shmseg.shm_atime ? ctime(&shmseg.shm_atime) + 4 : "Not set",
shmseg.shm_dtime ? ctime(&shmseg.shm_dtime) + 4 : "Not set",
shmseg.shm_ctime ? ctime(&shmseg.shm_ctime) + 4 : "Not set");
break;
case PID:
if (pw)
printf ("%-10d%-10.10s", shmid, pw->pw_name);
else
printf ("%-10d%-10d", shmid, ipcp->uid);
printf ("%-10d%-10d\n",
shmseg.shm_cpid, shmseg.shm_lpid);
break;
default:
printf( "0x%08x ",ipcp->KEY );
if (pw)
printf ("%-10d%-10.10s", shmid, pw->pw_name);
else
printf ("%-10d%-10d", shmid, ipcp->uid);
printf ("%-10o%-10d%-10d%-6s%-6s\n",
ipcp->mode & 0777,
shmseg.shm_segsz, shmseg.shm_nattch,
ipcp->mode & SHM_DEST ? "dest" : " ",
ipcp->mode & SHM_LOCKED ? "locked" : " ");
break;
}
}
return;
}
void do_sem (char format)
{
int maxid, semid, id;
struct semid_ds semary;
struct seminfo seminfo;
struct ipc_perm *ipcp = &semary.sem_perm;
struct passwd *pw;
union semun arg;
arg.array = (ushort *) &seminfo;
maxid = semctl (0, 0, SEM_INFO, arg);
if (maxid < 0) {
printf ("kernel not configured for semaphores\n");
return;
}
switch (format) {
case LIMITS:
printf ("------ Semaphore Limits --------\n");
arg.array = (ushort *) &seminfo; /* damn union */
if ((semctl (0, 0, IPC_INFO, arg)) < 0 )
return;
printf ("max number of arrays = %d\n", seminfo.semmni);
printf ("max semaphores per array = %d\n", seminfo.semmsl);
printf ("max semaphores system wide = %d\n", seminfo.semmns);
printf ("max ops per semop call = %d\n", seminfo.semopm);
printf ("semaphore max value = %d\n", seminfo.semvmx);
return;
case STATUS:
printf ("------ Semaphore Status --------\n");
printf ("used arrays = %d\n", seminfo.semusz);
printf ("allocated semaphores = %d\n", seminfo.semaem);
return;
case CREATOR:
printf ("------ Semaphore Arrays Creators/Owners --------\n");
printf ("%-10s%-10s%-10s%-10s%-10s%-10s\n",
"semid","perms","cuid","cgid","uid","gid");
break;
case TIME:
printf ("------ Shared Memory Operation/Change Times --------\n");
printf ("%-8s%-10s %-26.24s %-26.24s\n",
"shmid","owner","last-op","last-changed");
break;
case PID:
break;
default:
printf ("------ Semaphore Arrays --------\n");
printf ("%-10s%-10s%-10s%-10s%-10s%-12s\n",
"key","semid","owner","perms","nsems","status");
break;
}
for (id = 0; id <= maxid; id++) {
arg.buf = (struct semid_ds *) &semary;
semid = semctl (id, 0, SEM_STAT, arg);
if (semid < 0)
continue;
if (format == CREATOR) {
print_perms (semid, ipcp);
continue;
}
pw = getpwuid(ipcp->uid);
switch (format) {
case TIME:
if (pw)
printf ("%-8d%-10.10s", semid, pw->pw_name);
else
printf ("%-8d%-10d", semid, ipcp->uid);
printf (" %-26.24s %-26.24s\n",
semary.sem_otime ? ctime(&semary.sem_otime) : "Not set",
semary.sem_ctime ? ctime(&semary.sem_ctime) : "Not set");
break;
case PID:
break;
default:
printf( "0x%08x ",ipcp->KEY );
if (pw)
printf ("%-10d%-10.9s", semid, pw->pw_name);
else
printf ("%-10d%-9d", semid, ipcp->uid);
printf ("%-10o%-10d\n",
ipcp->mode & 0777,
semary.sem_nsems);
break;
}
}
return;
}
void do_msg (char format)
{
int maxid, msqid, id;
struct msqid_ds msgque;
struct msginfo msginfo;
struct ipc_perm *ipcp = &msgque.msg_perm;
struct passwd *pw;
maxid = msgctl (0, MSG_INFO, (struct msqid_ds *) &msginfo);
if (maxid < 0) {
printf ("kernel not configured for shared memory\n");
return;
}
switch (format) {
case LIMITS:
if ((msgctl (0, IPC_INFO, (struct msqid_ds *) &msginfo)) < 0 )
return;
printf ("------ Messages: Limits --------\n");
printf ("max queues system wide = %d\n", msginfo.msgmni);
printf ("max size of message (bytes) = %d\n", msginfo.msgmax);
printf ("default max size of queue (bytes) = %d\n", msginfo.msgmnb);
return;
case STATUS:
printf ("------ Messages: Status --------\n");
printf ("allocated queues = %d\n", msginfo.msgpool);
printf ("used headers = %d\n", msginfo.msgmap);
printf ("used space = %d bytes\n", msginfo.msgtql);
return;
case CREATOR:
printf ("------ Message Queues: Creators/Owners --------\n");
printf ("%-10s%-10s%-10s%-10s%-10s%-10s\n",
"msqid","perms","cuid","cgid","uid","gid");
break;
case TIME:
printf ("------ Message Queues Send/Recv/Change Times --------\n");
printf ("%-8s%-10s %-20s%-20s%-20s\n",
"msqid","owner","send","recv","change");
break;
case PID:
printf ("------ Message Queues PIDs --------\n");
printf ("%-10s%-10s%-10s%-10s\n","msqid","owner","lspid","lrpid");
break;
default:
printf ("------ Message Queues --------\n");
printf ("%-10s%-10s%-10s%-10s%-12s%-12s\n", "key","msqid",
"owner", "perms", "used-bytes", "messages");
break;
}
for (id = 0; id <= maxid; id++) {
msqid = msgctl (id, MSG_STAT, &msgque);
if (msqid < 0)
continue;
if (format == CREATOR) {
print_perms (msqid, ipcp);
continue;
}
pw = getpwuid(ipcp->uid);
switch (format) {
case TIME:
if (pw)
printf ("%-8d%-10.10s", msqid, pw->pw_name);
else
printf ("%-8d%-10d", msqid, ipcp->uid);
printf (" %-20.16s%-20.16s%-20.16s\n",
msgque.msg_stime ? ctime(&msgque.msg_stime) + 4 : "Not set",
msgque.msg_rtime ? ctime(&msgque.msg_rtime) + 4 : "Not set",
msgque.msg_ctime ? ctime(&msgque.msg_ctime) + 4 : "Not set");
break;
case PID:
if (pw)
printf ("%-8d%-10.10s", msqid, pw->pw_name);
else
printf ("%-8d%-10d", msqid, ipcp->uid);
printf (" %5d %5d\n",
msgque.msg_lspid, msgque.msg_lrpid);
break;
default:
printf( "0x%08x ",ipcp->KEY );
if (pw)
printf ("%-10d%-10.10s", msqid, pw->pw_name);
else
printf ("%-10d%-10d", msqid, ipcp->uid);
printf ("%-10o%-12d%-12d\n",
ipcp->mode & 0777, msgque.msg_cbytes,
msgque.msg_qnum);
break;
}
}
return;
}
void print_shm (int shmid)
{
struct shmid_ds shmds;
struct ipc_perm *ipcp = &shmds.shm_perm;
if (shmctl (shmid, IPC_STAT, &shmds) == -1) {
perror ("shmctl ");
return;
}
printf ("\nShared memory Segment shmid=%d\n", shmid);
printf ("uid=%d\tgid=%d\tcuid=%d\tcgid=%d\n",
ipcp->uid, ipcp->gid, ipcp->cuid, ipcp->cgid);
printf ("mode=%#o\taccess_perms=%#o\n", ipcp->mode, ipcp->mode & 0777);
printf ("bytes=%d\tlpid=%d\tcpid=%d\tnattch=%d\n",
shmds.shm_segsz, shmds.shm_lpid, shmds.shm_cpid,
shmds.shm_nattch);
printf ("att_time=%s", shmds.shm_atime ? ctime (&shmds.shm_atime) :
"Not set\n");
printf ("det_time=%s", shmds.shm_dtime ? ctime (&shmds.shm_dtime) :
"Not set\n");
printf ("change_time=%s", ctime (&shmds.shm_ctime));
printf ("\n");
return;
}
void print_msg (int msqid)
{
struct msqid_ds buf;
struct ipc_perm *ipcp = &buf.msg_perm;
if (msgctl (msqid, IPC_STAT, &buf) == -1) {
perror ("msgctl ");
return;
}
printf ("\nMessage Queue msqid=%d\n", msqid);
printf ("uid=%d\tgid=%d\tcuid=%d\tcgid=%d\tmode=%#o\n",
ipcp->uid, ipcp->gid, ipcp->cuid, ipcp->cgid, ipcp->mode);
printf ("cbytes=%d\tqbytes=%d\tqnum=%d\tlspid=%d\tlrpid=%d\n",
buf.msg_cbytes, buf.msg_qbytes, buf.msg_qnum, buf.msg_lspid,
buf.msg_lrpid);
printf ("send_time=%srcv_time=%schange_time=%s",
buf.msg_rtime? ctime (&buf.msg_rtime) : "Not Set\n",
buf.msg_stime? ctime (&buf.msg_stime) : "Not Set\n",
buf.msg_ctime? ctime (&buf.msg_ctime) : "Not Set\n");
printf ("\n");
return;
}
void print_sem (int semid)
{
struct semid_ds semds;
struct ipc_perm *ipcp = &semds.sem_perm;
union semun arg;
int i;
arg.buf = &semds;
if (semctl (semid, 0, IPC_STAT, arg) < 0) {
perror ("semctl ");
return;
}
printf ("\nSemaphore Array semid=%d\n", semid);
printf ("uid=%d\t gid=%d\t cuid=%d\t cgid=%d\n",
ipcp->uid, ipcp->gid, ipcp->cuid, ipcp->cgid);
printf ("mode=%#o, access_perms=%#o\n", ipcp->mode, ipcp->mode & 0777);
printf ("nsems = %d\n", semds.sem_nsems);
printf ("otime = %s", semds.sem_otime ? ctime (&semds.sem_otime) :
"Not set\n");
printf ("ctime = %s", ctime (&semds.sem_ctime));
printf ("%-10s%-10s%-10s%-10s%-10s\n", "semnum","value","ncount",
"zcount","pid");
arg.val = 0;
for (i=0; i< semds.sem_nsems; i++) {
int val, ncnt, zcnt, pid;
val = semctl (semid, i, GETVAL, arg);
ncnt = semctl (semid, i, GETNCNT, arg);
zcnt = semctl (semid, i, GETZCNT, arg);
pid = semctl (semid, i, GETPID, arg);
if (val < 0 || ncnt < 0 || zcnt < 0 || pid < 0) {
perror ("semctl ");
exit (1);
}
printf ("%-10d%-10d%-10d%-10d%-10d\n", i, val, ncnt, zcnt, pid);
}
printf ("\n");
return;
}
