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util-linux/sys-utils/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¶kiewicz <misiek@pld.ORG.PL>
* - added Native Language Support
*/
#include <errno.h>
#include <features.h>
#include <getopt.h>
#include <grp.h>
#include <pwd.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/ipc.h>
#include <sys/msg.h>
#include <sys/sem.h>
#include <sys/shm.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#include "c.h"
#include "nls.h"
#include "closestream.h"
/*
* 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.
*/
#ifndef HAVE_UNION_SEMUN
/* 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;
* glibc-1.09 has no support for sysv ipc.
* glibc 2 uses __key, __seq
*/
#if defined (__GLIBC__) && __GLIBC__ >= 2
# 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 void __attribute__ ((__noreturn__)) usage(FILE * out)
{
fprintf(out, USAGE_HEADER);
fprintf(out, " %s [resource ...] [output-format]\n", program_invocation_short_name);
fprintf(out, " %s [resource] -i <id>\n", program_invocation_short_name);
fprintf(out, USAGE_OPTIONS);
fputs(_(" -i, --id <id> print details on resource identified by id\n"), out);
fprintf(out, USAGE_HELP);
fprintf(out, USAGE_VERSION);
fputs(_("\n"), out);
fputs(_("Resource options:\n"), out);
fputs(_(" -m, --shmems shared memory segments\n"), out);
fputs(_(" -q, --queues message queues\n"), out);
fputs(_(" -s, --semaphores semaphores\n"), out);
fputs(_(" -a, --all all (default)\n"), out);
fputs(_("\n"), out);
fputs(_("Output format:\n"), out);
fputs(_(" -t, --time show attach, detach and change times\n"), out);
fputs(_(" -p, --pid show creator and last operations PIDs\n"), out);
fputs(_(" -c, --creator show creator and owner\n"), out);
fputs(_(" -l, --limits show resource limits\n"), out);
fputs(_(" -u, --summary show status summary\n"), out);
fprintf(out, USAGE_MAN_TAIL("ipcs(1)"));
exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS);
}
int main (int argc, char **argv)
{
int opt, msg = 0, sem = 0, shm = 0, id=0, print=0;
char format = 0;
static const struct option longopts[] = {
{"id", required_argument, NULL, 'i'},
{"shmems", no_argument, NULL, 'm'},
{"queues", no_argument, NULL, 'q'},
{"semaphores", no_argument, NULL, 's'},
{"all", no_argument, NULL, 'a'},
{"time", no_argument, NULL, 't'},
{"pid", no_argument, NULL, 'p'},
{"creator", no_argument, NULL, 'c'},
{"limits", no_argument, NULL, 'l'},
{"summary", no_argument, NULL, 'u'},
{"version", no_argument, NULL, 'V'},
{"help", no_argument, NULL, 'h'},
{NULL, 0, NULL, 0}
};
char options[] = "i:mqsatpcluVh";
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
atexit(close_stdout);
while ((opt = getopt_long(argc, argv, options, longopts, NULL)) != -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':
usage(stdout);
case 'V':
printf(UTIL_LINUX_VERSION);
return EXIT_SUCCESS;
default:
usage(stderr);
}
}
if (print) {
if (shm)
print_shm (id);
if (sem)
print_sem (id);
if (msg)
print_msg (id);
if (!shm && !sem && !msg )
usage (stderr);
} 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(" %-10u", ipcp->cuid);
if ((gr = getgrgid(ipcp->cgid)))
printf(" %-10s", gr->gr_name);
else
printf(" %-10u", ipcp->cgid);
if ((pw = getpwuid(ipcp->uid)))
printf(" %-10s", pw->pw_name);
else
printf(" %-10u", ipcp->uid);
if ((gr = getgrgid(ipcp->gid)))
printf(" %-10s\n", gr->gr_name);
else
printf(" %-10u\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) {
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) = %llu\n"),
getpagesize() / 1024 * (unsigned long long) shminfo.shmall);
printf (_("min seg size (bytes) = %lu\n"),
(unsigned long) shminfo.shmmin);
return;
case STATUS:
printf (_("------ Shared Memory Status --------\n"));
/*
* TRANSLATORS: This output format is maintained for backward
* compatibility as ipcs is used in scripts. For consistency
* with the rest, the translated form can follow this model:
*
* "segments allocated = %d\n"
* "pages allocated = %ld\n"
* "pages resident = %ld\n"
* "pages swapped = %ld\n"
* "swap performance = %ld attempts, %ld successes\n"
*/
printf (_("segments allocated %d\n"
"pages allocated %ld\n"
"pages resident %ld\n"
"pages swapped %ld\n"
"Swap performance: %ld attempts\t %ld successes\n"),
shm_info.used_ids,
shm_info.shm_tot,
shm_info.shm_rss,
shm_info.shm_swp,
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 PIDs --------\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 %-10u", 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 %-10u", 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 %-10u", 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 = (ushort *) (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 = (ushort *) (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 %-10u", 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 %-10u", 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)
{
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 %-10u", 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 %-10u", 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 %-10u", 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;
}
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=%u\tgid=%u\tcuid=%u\tcgid=%u\n"),
ipcp->uid, ipcp->gid, ipcp->cuid, ipcp->cgid);
printf (_("mode=%#o\taccess_perms=%#o\n"),
ipcp->mode, ipcp->mode & 0777);
printf (_("bytes=%lu\tlpid=%d\tcpid=%d\tnattch=%ld\n"),
(unsigned 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)
{
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=%u\tgid=%u\tcuid=%u\tcgid=%u\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;
}
void print_sem (int semid)
{
struct semid_ds semds;
struct ipc_perm *ipcp = &semds.sem_perm;
union semun arg;
size_t 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=%u\t gid=%u\t cuid=%u\t cgid=%u\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 ("%-10zd %-10d %-10d %-10d %-10d\n",
i, val, ncnt, zcnt, pid);
}
printf ("\n");
return;
}
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