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minix3/commands/ipcs/ipcs.c

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/* Original author unknown, 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
1999-02-22 Arkadiusz Mi秌iewicz <misiek@pld.ORG.PL>
- added Native Language Support
*/
#define __USE_MISC
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <time.h>
#include <pwd.h>
#include <grp.h>
#include <unistd.h>
#include <stdarg.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/sem.h>
/* remove _() stuff */
#define _(a) a
/*-------------------------------------------------------------------*/
/* SHM_DEST and SHM_LOCKED are defined in kernel headers,
but inside #ifdef __KERNEL__ ... #endif */
#ifndef SHM_DEST
/* shm_mode upper byte flags */
#define SHM_DEST 01000 /* segment will be destroyed on last detach */
#define SHM_LOCKED 02000 /* segment will not be swapped */
#endif
/* For older kernels the same holds for the defines below */
#ifndef MSG_STAT
#define MSG_STAT 11
#define MSG_INFO 12
#endif
#ifndef SHM_STAT
#define SHM_STAT 13
#define SHM_INFO 14
struct shm_info {
int used_ids;
ulong shm_tot; /* total allocated shm */
ulong shm_rss; /* total resident shm */
ulong shm_swp; /* total swapped shm */
ulong swap_attempts;
ulong swap_successes;
};
#endif
#ifndef SEM_STAT
#define SEM_STAT 18
#define SEM_INFO 19
#endif
/* Some versions of libc only define IPC_INFO when __USE_GNU is defined. */
#ifndef IPC_INFO
#define IPC_INFO 3
#endif
/*-------------------------------------------------------------------*/
/* 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;
static void
usage(int rc) {
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);
exit(rc);
}
static void
help (int rc) {
printf (_("%s provides information on ipc facilities for"
" which you have read access.\n"), progname);
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(rc);
}
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)) != -1) {
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_SUCCESS);
case '?':
usage(EXIT_SUCCESS);
}
}
if (print) {
if (shm)
print_shm (id);
else if (sem)
print_sem (id);
else if (msg)
print_msg (id);
else
usage (EXIT_FAILURE);
} else {
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 EXIT_SUCCESS;
}
static 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 *) (void *) &shm_info);
if (maxid < 0 && errno == ENOSYS) {
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 *) (void *) &shminfo)) < 0 )
return;
/* glibc 2.1.3 and all earlier libc's have ints as fields
of struct shminfo; glibc 2.1.91 has unsigned long; ach */
printf (_("max number of segments = %lu\n"),
(unsigned long) shminfo.shmmni);
printf (_("max seg size (kbytes) = %lu\n"),
(unsigned long) (shminfo.shmmax >> 10));
printf (_("max total shared memory (kbytes) = %lu\n"),
getpagesize() / 1024 * (unsigned long) shminfo.shmall);
printf (_("min seg size (bytes) = %lu\n"),
(unsigned long) 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);
/* ctime uses static buffer: use separate calls */
printf(" %-20.16s", shmseg.shm_atime
? ctime(&shmseg.shm_atime) + 4 : _("Not set"));
printf(" %-20.16s", shmseg.shm_dtime
? ctime(&shmseg.shm_dtime) + 4 : _("Not set"));
printf(" %-20.16s\n", 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 %-10lu %-10ld %-6s %-6s\n",
ipcp->mode & 0777,
/*
* earlier: int, Austin has size_t
*/
(unsigned long) shmseg.shm_segsz,
/*
* glibc-2.1.3 and earlier has unsigned short;
* Austin has shmatt_t
*/
(long) 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 = (unsigned short *) (void *) &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 = (unsigned short *) (void *) &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 (_("------ Semaphore Operation/Change Times --------\n"));
printf ("%-8s %-10s %-26.24s %-26.24s\n",
_("semid"),_("owner"),_("last-op"),_("last-changed"));
break;
case PID:
break;
default:
printf (_("------ Semaphore Arrays --------\n"));
printf ("%-10s %-10s %-10s %-10s %-10s\n",
_("key"),_("semid"),_("owner"),_("perms"),_("nsems"));
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", semary.sem_otime
? ctime(&semary.sem_otime) : _("Not set"));
printf (" %-26.24s\n", semary.sem_ctime
? ctime(&semary.sem_ctime) : _("Not set"));
break;
case PID:
break;
default:
printf("0x%08x ", ipcp->KEY);
if (pw)
printf ("%-10d %-10.10s", semid, pw->pw_name);
else
printf ("%-10d %-10d", semid, ipcp->uid);
printf (" %-10o %-10ld\n",
ipcp->mode & 0777,
/*
* glibc-2.1.3 and earlier has unsigned short;
* glibc-2.1.91 has variation between
* unsigned short and unsigned long
* Austin prescribes unsigned short.
*/
(long) semary.sem_nsems);
break;
}
}
}
void do_msg (char format)
{
#if 0
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 *) (void *) &msginfo);
if (maxid < 0) {
printf (_("kernel not configured for message queues\n"));
return;
}
switch (format) {
case LIMITS:
if ((msgctl (0, IPC_INFO, (struct msqid_ds *) (void *) &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", msgque.msg_stime
? ctime(&msgque.msg_stime) + 4 : _("Not set"));
printf (" %-20.16s", msgque.msg_rtime
? ctime(&msgque.msg_rtime) + 4 : _("Not set"));
printf (" %-20.16s\n", 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 %-12ld %-12ld\n",
ipcp->mode & 0777,
/*
* glibc-2.1.3 and earlier has unsigned short;
* glibc-2.1.91 has variation between
* unsigned short, unsigned long
* Austin has msgqnum_t
*/
(long) msgque.msg_cbytes,
(long) msgque.msg_qnum);
break;
}
}
return;
#endif
}
void print_shm (int shmid)
{
struct shmid_ds shmds;
struct ipc_perm *ipcp = &shmds.shm_perm;
if (shmctl (shmid, IPC_STAT, &shmds) == -1)
err(EXIT_FAILURE, _("shmctl failed"));
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=%ld\tlpid=%d\tcpid=%d\tnattch=%ld\n"),
(long) shmds.shm_segsz, shmds.shm_lpid, shmds.shm_cpid,
(long) shmds.shm_nattch);
printf (_("att_time=%-26.24s\n"),
shmds.shm_atime ? ctime (&shmds.shm_atime) : _("Not set"));
printf (_("det_time=%-26.24s\n"),
shmds.shm_dtime ? ctime (&shmds.shm_dtime) : _("Not set"));
printf (_("change_time=%-26.24s\n"), ctime (&shmds.shm_ctime));
printf ("\n");
return;
}
void print_msg (int msqid)
{
#if 0
struct msqid_ds buf;
struct ipc_perm *ipcp = &buf.msg_perm;
if (msgctl (msqid, IPC_STAT, &buf) == -1)
err(EXIT_FAILURE, _("msgctl failed"));
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=%ld\tqbytes=%ld\tqnum=%ld\tlspid=%d\tlrpid=%d\n"),
/*
* glibc-2.1.3 and earlier has unsigned short;
* glibc-2.1.91 has variation between
* unsigned short, unsigned long
* Austin has msgqnum_t (for msg_qbytes)
*/
(long) buf.msg_cbytes, (long) buf.msg_qbytes,
(long) buf.msg_qnum, buf.msg_lspid, buf.msg_lrpid);
printf (_("send_time=%-26.24s\n"),
buf.msg_stime ? ctime (&buf.msg_stime) : _("Not set"));
printf (_("rcv_time=%-26.24s\n"),
buf.msg_rtime ? ctime (&buf.msg_rtime) : _("Not set"));
printf (_("change_time=%-26.24s\n"),
buf.msg_ctime ? ctime (&buf.msg_ctime) : _("Not set"));
printf ("\n");
return;
#endif
}
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)
err(EXIT_FAILURE, _("semctl failed"));
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 = %ld\n"), (long) semds.sem_nsems);
printf (_("otime = %-26.24s\n"),
semds.sem_otime ? ctime (&semds.sem_otime) : _("Not set"));
printf (_("ctime = %-26.24s\n"), 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)
err(EXIT_FAILURE, _("semctl failed"));
printf ("%-10d %-10d %-10d %-10d %-10d\n",
i, val, ncnt, zcnt, pid);
}
printf ("\n");
return;
}
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