busybox/util-linux/ipcs.c

/* vi: set sw=4 ts=4: */
/*
 * ipcs.c -- provides information on allocated ipc resources.
 *
 * 01 Sept 2004 - Rodney Radford <rradford@mindspring.com>
 * Adapted for busybox from util-linux-2.12a.
 *
 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
 */

#include "busybox.h"
#include <errno.h>
#include <time.h>
#include <pwd.h>
#include <grp.h>

/* 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>


/*-------------------------------------------------------------------*/
/* 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

static char format;

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);
}


static void do_shm(void)
{
	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 %s\n", "shared memory");
		return;
	}

	switch (format) {
	case LIMITS:
		printf("------ Shared Memory %s --------\n", "Limits");
		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"
				  "max seg size (kbytes) = %lu\n"
				  "max total shared memory (pages) = %lu\n"
				  "min seg size (bytes) = %lu\n",
				  (unsigned long) shminfo.shmmni,
				  (unsigned long) (shminfo.shmmax >> 10),
				  (unsigned long) shminfo.shmall,
				  (unsigned long) shminfo.shmmin);
		return;

	case STATUS:
		printf("------ Shared Memory %s --------\n", "Status");
		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 %s --------\n", "Segment Creators/Owners");
		printf(	  "%-10s %-10s %-10s %-10s %-10s %-10s\n",
				  "shmid", "perms", "cuid", "cgid", "uid", "gid");
		break;

	case TIME:
		printf("------ Shared Memory %s --------\n", "Attach/Detach/Change Times");
		printf(	  "%-10s %-10s %-20s %-20s %-20s\n",
				  "shmid", "owner", "attached", "detached", "changed");
		break;

	case PID:
		printf("------ Shared Memory %s --------\n", "Creator/Last-op");
		printf(	  "%-10s %-10s %-10s %-10s\n",
				  "shmid", "owner", "cpid", "lpid");
		break;

	default:
		printf("------ Shared Memory %s --------\n", "Segments");
		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;
		}
	}
}


static void do_sem(void)
{
	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 %s\n", "semaphores");
		return;
	}

	switch (format) {
	case LIMITS:
		printf("------ Semaphore %s --------\n", "Limits");
		arg.array = (ushort *) (void *) &seminfo;	/* damn union */
		if ((semctl(0, 0, IPC_INFO, arg)) < 0)
			return;
		printf("max number of arrays = %d\n"
				  "max semaphores per array = %d\n"
				  "max semaphores system wide = %d\n"
				  "max ops per semop call = %d\n"
				  "semaphore max value = %d\n",
				  seminfo.semmni,
				  seminfo.semmsl,
				  seminfo.semmns, seminfo.semopm, seminfo.semvmx);
		return;

	case STATUS:
		printf("------ Semaphore %s --------\n", "Status");
		printf(	  "used arrays = %d\n"
				  "allocated semaphores = %d\n",
				  seminfo.semusz, seminfo.semaem);
		return;

	case CREATOR:
		printf("------ Semaphore %s --------\n", "Arrays Creators/Owners");
		printf(	  "%-10s %-10s %-10s %-10s %-10s %-10s\n",
				  "semid", "perms", "cuid", "cgid", "uid", "gid");
		break;

	case TIME:
		printf("------ Shared Memory %s --------\n", "Operation/Change Times");
		printf(	  "%-8s %-10s %-26.24s %-26.24s\n",
				  "shmid", "owner", "last-op", "last-changed");
		break;

	case PID:
		break;

	default:
		printf("------ Semaphore %s --------\n", "Arrays");
		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);
			/* ctime uses static buffer: use separate calls */
			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 %-10.9s", semid, pw->pw_name);
			else
				printf("%-10d %-9d", 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;
		}
	}
}


static void do_msg(void)
{
	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 %s\n", "message queues");
		return;
	}

	switch (format) {
	case LIMITS:
		if ((msgctl(0, IPC_INFO, (struct msqid_ds *) (void *) &msginfo)) < 0)
			return;
		printf("------ Message%s --------\n", "s: Limits");
		printf(	  "max queues system wide = %d\n"
				  "max size of message (bytes) = %d\n"
				  "default max size of queue (bytes) = %d\n",
				  msginfo.msgmni, msginfo.msgmax, msginfo.msgmnb);
		return;

	case STATUS:
		printf("------ Message%s --------\n", "s: Status");
		printf(	  "allocated queues = %d\n"
				  "used headers = %d\n"
				  "used space = %d bytes\n",
				  msginfo.msgpool, msginfo.msgmap, msginfo.msgtql);
		return;

	case CREATOR:
		printf("------ Message%s --------\n", " Queues: Creators/Owners");
		printf(	  "%-10s %-10s %-10s %-10s %-10s %-10s\n",
				  "msqid", "perms", "cuid", "cgid", "uid", "gid");
		break;

	case TIME:
		printf("------ Message%s --------\n", " Queues Send/Recv/Change Times");
		printf(	  "%-8s %-10s %-20s %-20s %-20s\n",
				  "msqid", "owner", "send", "recv", "change");
		break;

	case PID:
		printf("------ Message%s --------\n", " Queues PIDs");
		printf(	  "%-10s %-10s %-10s %-10s\n",
				  "msqid", "owner", "lspid", "lrpid");
		break;

	default:
		printf("------ Message%s --------\n", " Queues");
		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;
		}
	}
}


static void print_shm(int shmid)
{
	struct shmid_ds shmds;
	struct ipc_perm *ipcp = &shmds.shm_perm;

	if (shmctl(shmid, IPC_STAT, &shmds) == -1) {
		bb_perror_msg("shmctl");
		return;
	}

	printf("\nShared memory Segment shmid=%d\n"
			  "uid=%d\tgid=%d\tcuid=%d\tcgid=%d\n"
			  "mode=%#o\taccess_perms=%#o\n"
			  "bytes=%ld\tlpid=%d\tcpid=%d\tnattch=%ld\n",
			  shmid,
			  ipcp->uid, ipcp->gid, ipcp->cuid, ipcp->cgid,
			  ipcp->mode, ipcp->mode & 0777,
			  (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\n", ctime(&shmds.shm_ctime));
}


static void print_msg(int msqid)
{
	struct msqid_ds buf;
	struct ipc_perm *ipcp = &buf.msg_perm;

	if (msgctl(msqid, IPC_STAT, &buf) == -1) {
		bb_perror_msg("msgctl");
		return;
	}

	printf("\nMessage Queue msqid=%d\n"
			  "uid=%d\tgid=%d\tcuid=%d\tcgid=%d\tmode=%#o\n"
			  "cbytes=%ld\tqbytes=%ld\tqnum=%ld\tlspid=%d\tlrpid=%d\n",
			  msqid, ipcp->uid, ipcp->gid, ipcp->cuid, ipcp->cgid, ipcp->mode,
			  /*
			   * 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\n",
			  buf.msg_ctime ? ctime(&buf.msg_ctime) : "Not set");
}

static void print_sem(int semid)
{
	struct semid_ds semds;
	struct ipc_perm *ipcp = &semds.sem_perm;
	union semun arg;
	unsigned int i;

	arg.buf = &semds;
	if (semctl(semid, 0, IPC_STAT, arg)) {
		bb_perror_msg("semctl");
		return;
	}

	printf("\nSemaphore Array semid=%d\n"
			  "uid=%d\t gid=%d\t cuid=%d\t cgid=%d\n"
			  "mode=%#o, access_perms=%#o\n"
			  "nsems = %ld\n"
			  "otime = %-26.24s\n",
			  semid,
			  ipcp->uid, ipcp->gid, ipcp->cuid, ipcp->cgid,
			  ipcp->mode, ipcp->mode & 0777,
			  (long) semds.sem_nsems,
			  semds.sem_otime ? ctime(&semds.sem_otime) : "Not set");
	printf("ctime = %-26.24s\n"
			  "%-10s %-10s %-10s %-10s %-10s\n",
			  ctime(&semds.sem_ctime),
			  "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) {
			bb_perror_msg_and_die("semctl");
		}
		printf("%-10d %-10d %-10d %-10d %-10d\n", i, val, ncnt, zcnt, pid);
	}
	puts("");
}

int ipcs_main(int argc, char **argv)
{
	int id = 0;
	unsigned flags = 0;
	unsigned opt;
	char *opt_i;
#define flag_print	(1<<0)
#define flag_msg	(1<<1)
#define flag_sem	(1<<2)
#define flag_shm	(1<<3)

	opt = getopt32(argc, argv, "i:aqsmtcplu", &opt_i);
	if (opt & 0x1) { // -i
		id = xatoi(opt_i);
		flags |= flag_print;
	}
	if (opt & 0x2) flags |= flag_msg | flag_sem | flag_shm; // -a
	if (opt & 0x4) flags |= flag_msg; // -q
	if (opt & 0x8) flags |= flag_sem; // -s
	if (opt & 0x10) flags |= flag_shm; // -m
	if (opt & 0x20) format = TIME; // -t
	if (opt & 0x40) format = CREATOR; // -c
	if (opt & 0x80) format = PID; // -p
	if (opt & 0x100) format = LIMITS; // -l
	if (opt & 0x200) format = STATUS; // -u

	if (flags & flag_print) {
		if (flags & flag_shm) {
			print_shm(id);
			fflush_stdout_and_exit(0);
		}
		if (flags & flag_sem) {
			print_sem(id);
			fflush_stdout_and_exit(0);
		}
		if (flags & flag_msg) {
			print_msg(id);
			fflush_stdout_and_exit(0);
		}
		bb_show_usage();
	}

	if (!(flags & (flag_shm | flag_msg | flag_sem)))
		flags |= flag_msg | flag_shm | flag_sem;
	puts("");

	if (flags & flag_shm) {
		do_shm();
		puts("");
	}
	if (flags & flag_sem) {
		do_sem();
		puts("");
	}
	if (flags & flag_msg) {
		do_msg();
		puts("");
	}
	fflush_stdout_and_exit(0);
}
1	niro	532	/* vi: set sw=4 ts=4: */
2			/*
3			* ipcs.c -- provides information on allocated ipc resources.
4			*
5			* 01 Sept 2004 - Rodney Radford <rradford@mindspring.com>
6			* Adapted for busybox from util-linux-2.12a.
7			*
8			* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
9			*/
10
11			#include "busybox.h"
12			#include <errno.h>
13			#include <time.h>
14			#include <pwd.h>
15			#include <grp.h>
16
17			/* X/OPEN tells us to use <sys/{types,ipc,sem}.h> for semctl() */
18			/* X/OPEN tells us to use <sys/{types,ipc,msg}.h> for msgctl() */
19			/* X/OPEN tells us to use <sys/{types,ipc,shm}.h> for shmctl() */
20			#include <sys/types.h>
21			#include <sys/ipc.h>
22			#include <sys/sem.h>
23			#include <sys/msg.h>
24			#include <sys/shm.h>
25
26
27
28			/-------------------------------------------------------------------/
29			/* SHM_DEST and SHM_LOCKED are defined in kernel headers,
30			but inside #ifdef __KERNEL__ ... #endif */
31			#ifndef SHM_DEST
32			/* shm_mode upper byte flags */
33			#define SHM_DEST 01000 /* segment will be destroyed on last detach */
34			#define SHM_LOCKED 02000 /* segment will not be swapped */
35			#endif
36
37			/* For older kernels the same holds for the defines below */
38			#ifndef MSG_STAT
39			#define MSG_STAT 11
40			#define MSG_INFO 12
41			#endif
42
43			#ifndef SHM_STAT
44			#define SHM_STAT 13
45			#define SHM_INFO 14
46			struct shm_info {
47			int used_ids;
48			ulong shm_tot; /* total allocated shm */
49			ulong shm_rss; /* total resident shm */
50			ulong shm_swp; /* total swapped shm */
51			ulong swap_attempts;
52			ulong swap_successes;
53			};
54			#endif
55
56			#ifndef SEM_STAT
57			#define SEM_STAT 18
58			#define SEM_INFO 19
59			#endif
60
61			/* Some versions of libc only define IPC_INFO when __USE_GNU is defined. */
62			#ifndef IPC_INFO
63			#define IPC_INFO 3
64			#endif
65			/-------------------------------------------------------------------/
66
67			/* The last arg of semctl is a union semun, but where is it defined?
68			X/OPEN tells us to define it ourselves, but until recently
69			Linux include files would also define it. */
70			#if defined (__GNU_LIBRARY__) && !defined(_SEM_SEMUN_UNDEFINED)
71			/* union semun is defined by including <sys/sem.h> */
72			#else
73			/* according to X/OPEN we have to define it ourselves */
74			union semun {
75			int val;
76			struct semid_ds *buf;
77			unsigned short int *array;
78			struct seminfo *__buf;
79			};
80			#endif
81
82			/* X/OPEN (Jan 1987) does not define fields key, seq in struct ipc_perm;
83			libc 4/5 does not mention struct ipc_term at all, but includes
84			<linux/ipc.h>, which defines a struct ipc_perm with such fields.
85			glibc-1.09 has no support for sysv ipc.
86			glibc 2 uses __key, __seq */
87			#if defined (__GNU_LIBRARY__) && __GNU_LIBRARY__ > 1
88			#define KEY __key
89			#else
90			#define KEY key
91			#endif
92
93			#define LIMITS 1
94			#define STATUS 2
95			#define CREATOR 3
96			#define TIME 4
97			#define PID 5
98
99			static char format;
100
101			static void print_perms(int id, struct ipc_perm *ipcp)
102			{
103			struct passwd *pw;
104			struct group *gr;
105
106			printf("%-10d %-10o", id, ipcp->mode & 0777);
107
108			if ((pw = getpwuid(ipcp->cuid)))
109			printf(" %-10s", pw->pw_name);
110			else
111			printf(" %-10d", ipcp->cuid);
112			if ((gr = getgrgid(ipcp->cgid)))
113			printf(" %-10s", gr->gr_name);
114			else
115			printf(" %-10d", ipcp->cgid);
116
117			if ((pw = getpwuid(ipcp->uid)))
118			printf(" %-10s", pw->pw_name);
119			else
120			printf(" %-10d", ipcp->uid);
121			if ((gr = getgrgid(ipcp->gid)))
122			printf(" %-10s\n", gr->gr_name);
123			else
124			printf(" %-10d\n", ipcp->gid);
125			}
126
127
128			static void do_shm(void)
129			{
130			int maxid, shmid, id;
131			struct shmid_ds shmseg;
132			struct shm_info shm_info;
133			struct shminfo shminfo;
134			struct ipc_perm *ipcp = &shmseg.shm_perm;
135			struct passwd *pw;
136
137			maxid = shmctl(0, SHM_INFO, (struct shmid_ds ) (void ) &shm_info);
138			if (maxid < 0) {
139			printf("kernel not configured for %s\n", "shared memory");
140			return;
141			}
142
143			switch (format) {
144			case LIMITS:
145			printf("------ Shared Memory %s --------\n", "Limits");
146			if ((shmctl(0, IPC_INFO, (struct shmid_ds ) (void ) &shminfo)) < 0)
147			return;
148			/* glibc 2.1.3 and all earlier libc's have ints as fields
149			of struct shminfo; glibc 2.1.91 has unsigned long; ach */
150			printf("max number of segments = %lu\n"
151			"max seg size (kbytes) = %lu\n"
152			"max total shared memory (pages) = %lu\n"
153			"min seg size (bytes) = %lu\n",
154			(unsigned long) shminfo.shmmni,
155			(unsigned long) (shminfo.shmmax >> 10),
156			(unsigned long) shminfo.shmall,
157			(unsigned long) shminfo.shmmin);
158			return;
159
160			case STATUS:
161			printf("------ Shared Memory %s --------\n", "Status");
162			printf( "segments allocated %d\n"
163			"pages allocated %ld\n"
164			"pages resident %ld\n"
165			"pages swapped %ld\n"
166			"Swap performance: %ld attempts\t%ld successes\n",
167			shm_info.used_ids,
168			shm_info.shm_tot,
169			shm_info.shm_rss,
170			shm_info.shm_swp,
171			shm_info.swap_attempts, shm_info.swap_successes);
172			return;
173
174			case CREATOR:
175			printf("------ Shared Memory %s --------\n", "Segment Creators/Owners");
176			printf( "%-10s %-10s %-10s %-10s %-10s %-10s\n",
177			"shmid", "perms", "cuid", "cgid", "uid", "gid");
178			break;
179
180			case TIME:
181			printf("------ Shared Memory %s --------\n", "Attach/Detach/Change Times");
182			printf( "%-10s %-10s %-20s %-20s %-20s\n",
183			"shmid", "owner", "attached", "detached", "changed");
184			break;
185
186			case PID:
187			printf("------ Shared Memory %s --------\n", "Creator/Last-op");
188			printf( "%-10s %-10s %-10s %-10s\n",
189			"shmid", "owner", "cpid", "lpid");
190			break;
191
192			default:
193			printf("------ Shared Memory %s --------\n", "Segments");
194			printf( "%-10s %-10s %-10s %-10s %-10s %-10s %-12s\n",
195			"key", "shmid", "owner", "perms", "bytes", "nattch",
196			"status");
197			break;
198			}
199
200			for (id = 0; id <= maxid; id++) {
201			shmid = shmctl(id, SHM_STAT, &shmseg);
202			if (shmid < 0)
203			continue;
204			if (format == CREATOR) {
205			print_perms(shmid, ipcp);
206			continue;
207			}
208			pw = getpwuid(ipcp->uid);
209			switch (format) {
210			case TIME:
211			if (pw)
212			printf("%-10d %-10.10s", shmid, pw->pw_name);
213			else
214			printf("%-10d %-10d", shmid, ipcp->uid);
215			/* ctime uses static buffer: use separate calls */
216			printf(" %-20.16s", shmseg.shm_atime
217			? ctime(&shmseg.shm_atime) + 4 : "Not set");
218			printf(" %-20.16s", shmseg.shm_dtime
219			? ctime(&shmseg.shm_dtime) + 4 : "Not set");
220			printf(" %-20.16s\n", shmseg.shm_ctime
221			? ctime(&shmseg.shm_ctime) + 4 : "Not set");
222			break;
223			case PID:
224			if (pw)
225			printf("%-10d %-10.10s", shmid, pw->pw_name);
226			else
227			printf("%-10d %-10d", shmid, ipcp->uid);
228			printf(" %-10d %-10d\n", shmseg.shm_cpid, shmseg.shm_lpid);
229			break;
230
231			default:
232			printf("0x%08x ", ipcp->KEY);
233			if (pw)
234			printf("%-10d %-10.10s", shmid, pw->pw_name);
235			else
236			printf("%-10d %-10d", shmid, ipcp->uid);
237			printf(" %-10o %-10lu %-10ld %-6s %-6s\n", ipcp->mode & 0777,
238			/*
239			* earlier: int, Austin has size_t
240			*/
241			(unsigned long) shmseg.shm_segsz,
242			/*
243			* glibc-2.1.3 and earlier has unsigned short;
244			* Austin has shmatt_t
245			*/
246			(long) shmseg.shm_nattch,
247			ipcp->mode & SHM_DEST ? "dest" : " ",
248			ipcp->mode & SHM_LOCKED ? "locked" : " ");
249			break;
250			}
251			}
252			}
253
254
255			static void do_sem(void)
256			{
257			int maxid, semid, id;
258			struct semid_ds semary;
259			struct seminfo seminfo;
260			struct ipc_perm *ipcp = &semary.sem_perm;
261			struct passwd *pw;
262			union semun arg;
263
264			arg.array = (ushort ) (void ) &seminfo;
265			maxid = semctl(0, 0, SEM_INFO, arg);
266			if (maxid < 0) {
267			printf("kernel not configured for %s\n", "semaphores");
268			return;
269			}
270
271			switch (format) {
272			case LIMITS:
273			printf("------ Semaphore %s --------\n", "Limits");
274			arg.array = (ushort ) (void ) &seminfo; /* damn union */
275			if ((semctl(0, 0, IPC_INFO, arg)) < 0)
276			return;
277			printf("max number of arrays = %d\n"
278			"max semaphores per array = %d\n"
279			"max semaphores system wide = %d\n"
280			"max ops per semop call = %d\n"
281			"semaphore max value = %d\n",
282			seminfo.semmni,
283			seminfo.semmsl,
284			seminfo.semmns, seminfo.semopm, seminfo.semvmx);
285			return;
286
287			case STATUS:
288			printf("------ Semaphore %s --------\n", "Status");
289			printf( "used arrays = %d\n"
290			"allocated semaphores = %d\n",
291			seminfo.semusz, seminfo.semaem);
292			return;
293
294			case CREATOR:
295			printf("------ Semaphore %s --------\n", "Arrays Creators/Owners");
296			printf( "%-10s %-10s %-10s %-10s %-10s %-10s\n",
297			"semid", "perms", "cuid", "cgid", "uid", "gid");
298			break;
299
300			case TIME:
301			printf("------ Shared Memory %s --------\n", "Operation/Change Times");
302			printf( "%-8s %-10s %-26.24s %-26.24s\n",
303			"shmid", "owner", "last-op", "last-changed");
304			break;
305
306			case PID:
307			break;
308
309			default:
310			printf("------ Semaphore %s --------\n", "Arrays");
311			printf( "%-10s %-10s %-10s %-10s %-10s\n",
312			"key", "semid", "owner", "perms", "nsems");
313			break;
314			}
315
316			for (id = 0; id <= maxid; id++) {
317			arg.buf = (struct semid_ds *) &semary;
318			semid = semctl(id, 0, SEM_STAT, arg);
319			if (semid < 0)
320			continue;
321			if (format == CREATOR) {
322			print_perms(semid, ipcp);
323			continue;
324			}
325			pw = getpwuid(ipcp->uid);
326			switch (format) {
327			case TIME:
328			if (pw)
329			printf("%-8d %-10.10s", semid, pw->pw_name);
330			else
331			printf("%-8d %-10d", semid, ipcp->uid);
332			/* ctime uses static buffer: use separate calls */
333			printf(" %-26.24s", semary.sem_otime
334			? ctime(&semary.sem_otime) : "Not set");
335			printf(" %-26.24s\n", semary.sem_ctime
336			? ctime(&semary.sem_ctime) : "Not set");
337			break;
338			case PID:
339			break;
340
341			default:
342			printf("0x%08x ", ipcp->KEY);
343			if (pw)
344			printf("%-10d %-10.9s", semid, pw->pw_name);
345			else
346			printf("%-10d %-9d", semid, ipcp->uid);
347			printf(" %-10o %-10ld\n", ipcp->mode & 0777,
348			/*
349			* glibc-2.1.3 and earlier has unsigned short;
350			* glibc-2.1.91 has variation between
351			* unsigned short and unsigned long
352			* Austin prescribes unsigned short.
353			*/
354			(long) semary.sem_nsems);
355			break;
356			}
357			}
358			}
359
360
361			static void do_msg(void)
362			{
363			int maxid, msqid, id;
364			struct msqid_ds msgque;
365			struct msginfo msginfo;
366			struct ipc_perm *ipcp = &msgque.msg_perm;
367			struct passwd *pw;
368
369			maxid = msgctl(0, MSG_INFO, (struct msqid_ds ) (void ) &msginfo);
370			if (maxid < 0) {
371			printf("kernel not configured for %s\n", "message queues");
372			return;
373			}
374
375			switch (format) {
376			case LIMITS:
377			if ((msgctl(0, IPC_INFO, (struct msqid_ds ) (void ) &msginfo)) < 0)
378			return;
379			printf("------ Message%s --------\n", "s: Limits");
380			printf( "max queues system wide = %d\n"
381			"max size of message (bytes) = %d\n"
382			"default max size of queue (bytes) = %d\n",
383			msginfo.msgmni, msginfo.msgmax, msginfo.msgmnb);
384			return;
385
386			case STATUS:
387			printf("------ Message%s --------\n", "s: Status");
388			printf( "allocated queues = %d\n"
389			"used headers = %d\n"
390			"used space = %d bytes\n",
391			msginfo.msgpool, msginfo.msgmap, msginfo.msgtql);
392			return;
393
394			case CREATOR:
395			printf("------ Message%s --------\n", " Queues: Creators/Owners");
396			printf( "%-10s %-10s %-10s %-10s %-10s %-10s\n",
397			"msqid", "perms", "cuid", "cgid", "uid", "gid");
398			break;
399
400			case TIME:
401			printf("------ Message%s --------\n", " Queues Send/Recv/Change Times");
402			printf( "%-8s %-10s %-20s %-20s %-20s\n",
403			"msqid", "owner", "send", "recv", "change");
404			break;
405
406			case PID:
407			printf("------ Message%s --------\n", " Queues PIDs");
408			printf( "%-10s %-10s %-10s %-10s\n",
409			"msqid", "owner", "lspid", "lrpid");
410			break;
411
412			default:
413			printf("------ Message%s --------\n", " Queues");
414			printf( "%-10s %-10s %-10s %-10s %-12s %-12s\n",
415			"key", "msqid", "owner", "perms", "used-bytes", "messages");
416			break;
417			}
418
419			for (id = 0; id <= maxid; id++) {
420			msqid = msgctl(id, MSG_STAT, &msgque);
421			if (msqid < 0)
422			continue;
423			if (format == CREATOR) {
424			print_perms(msqid, ipcp);
425			continue;
426			}
427			pw = getpwuid(ipcp->uid);
428			switch (format) {
429			case TIME:
430			if (pw)
431			printf("%-8d %-10.10s", msqid, pw->pw_name);
432			else
433			printf("%-8d %-10d", msqid, ipcp->uid);
434			printf(" %-20.16s", msgque.msg_stime
435			? ctime(&msgque.msg_stime) + 4 : "Not set");
436			printf(" %-20.16s", msgque.msg_rtime
437			? ctime(&msgque.msg_rtime) + 4 : "Not set");
438			printf(" %-20.16s\n", msgque.msg_ctime
439			? ctime(&msgque.msg_ctime) + 4 : "Not set");
440			break;
441			case PID:
442			if (pw)
443			printf("%-8d %-10.10s", msqid, pw->pw_name);
444			else
445			printf("%-8d %-10d", msqid, ipcp->uid);
446			printf(" %5d %5d\n", msgque.msg_lspid, msgque.msg_lrpid);
447			break;
448
449			default:
450			printf("0x%08x ", ipcp->KEY);
451			if (pw)
452			printf("%-10d %-10.10s", msqid, pw->pw_name);
453			else
454			printf("%-10d %-10d", msqid, ipcp->uid);
455			printf(" %-10o %-12ld %-12ld\n", ipcp->mode & 0777,
456			/*
457			* glibc-2.1.3 and earlier has unsigned short;
458			* glibc-2.1.91 has variation between
459			* unsigned short, unsigned long
460			* Austin has msgqnum_t
461			*/
462			(long) msgque.msg_cbytes, (long) msgque.msg_qnum);
463			break;
464			}
465			}
466			}
467
468
469			static void print_shm(int shmid)
470			{
471			struct shmid_ds shmds;
472			struct ipc_perm *ipcp = &shmds.shm_perm;
473
474			if (shmctl(shmid, IPC_STAT, &shmds) == -1) {
475			bb_perror_msg("shmctl");
476			return;
477			}
478
479			printf("\nShared memory Segment shmid=%d\n"
480			"uid=%d\tgid=%d\tcuid=%d\tcgid=%d\n"
481			"mode=%#o\taccess_perms=%#o\n"
482			"bytes=%ld\tlpid=%d\tcpid=%d\tnattch=%ld\n",
483			shmid,
484			ipcp->uid, ipcp->gid, ipcp->cuid, ipcp->cgid,
485			ipcp->mode, ipcp->mode & 0777,
486			(long) shmds.shm_segsz, shmds.shm_lpid, shmds.shm_cpid,
487			(long) shmds.shm_nattch);
488			printf("att_time=%-26.24s\n",
489			shmds.shm_atime ? ctime(&shmds.shm_atime) : "Not set");
490			printf("det_time=%-26.24s\n",
491			shmds.shm_dtime ? ctime(&shmds.shm_dtime) : "Not set");
492			printf("change_time=%-26.24s\n\n", ctime(&shmds.shm_ctime));
493			}
494
495
496			static void print_msg(int msqid)
497			{
498			struct msqid_ds buf;
499			struct ipc_perm *ipcp = &buf.msg_perm;
500
501			if (msgctl(msqid, IPC_STAT, &buf) == -1) {
502			bb_perror_msg("msgctl");
503			return;
504			}
505
506			printf("\nMessage Queue msqid=%d\n"
507			"uid=%d\tgid=%d\tcuid=%d\tcgid=%d\tmode=%#o\n"
508			"cbytes=%ld\tqbytes=%ld\tqnum=%ld\tlspid=%d\tlrpid=%d\n",
509			msqid, ipcp->uid, ipcp->gid, ipcp->cuid, ipcp->cgid, ipcp->mode,
510			/*
511			* glibc-2.1.3 and earlier has unsigned short;
512			* glibc-2.1.91 has variation between
513			* unsigned short, unsigned long
514			* Austin has msgqnum_t (for msg_qbytes)
515			*/
516			(long) buf.msg_cbytes, (long) buf.msg_qbytes,
517			(long) buf.msg_qnum, buf.msg_lspid, buf.msg_lrpid);
518
519			printf("send_time=%-26.24s\n",
520			buf.msg_stime ? ctime(&buf.msg_stime) : "Not set");
521			printf("rcv_time=%-26.24s\n",
522			buf.msg_rtime ? ctime(&buf.msg_rtime) : "Not set");
523			printf("change_time=%-26.24s\n\n",
524			buf.msg_ctime ? ctime(&buf.msg_ctime) : "Not set");
525			}
526
527			static void print_sem(int semid)
528			{
529			struct semid_ds semds;
530			struct ipc_perm *ipcp = &semds.sem_perm;
531			union semun arg;
532			unsigned int i;
533
534			arg.buf = &semds;
535			if (semctl(semid, 0, IPC_STAT, arg)) {
536			bb_perror_msg("semctl");
537			return;
538			}
539
540			printf("\nSemaphore Array semid=%d\n"
541			"uid=%d\t gid=%d\t cuid=%d\t cgid=%d\n"
542			"mode=%#o, access_perms=%#o\n"
543			"nsems = %ld\n"
544			"otime = %-26.24s\n",
545			semid,
546			ipcp->uid, ipcp->gid, ipcp->cuid, ipcp->cgid,
547			ipcp->mode, ipcp->mode & 0777,
548			(long) semds.sem_nsems,
549			semds.sem_otime ? ctime(&semds.sem_otime) : "Not set");
550			printf("ctime = %-26.24s\n"
551			"%-10s %-10s %-10s %-10s %-10s\n",
552			ctime(&semds.sem_ctime),
553			"semnum", "value", "ncount", "zcount", "pid");
554
555			arg.val = 0;
556			for (i = 0; i < semds.sem_nsems; i++) {
557			int val, ncnt, zcnt, pid;
558
559			val = semctl(semid, i, GETVAL, arg);
560			ncnt = semctl(semid, i, GETNCNT, arg);
561			zcnt = semctl(semid, i, GETZCNT, arg);
562			pid = semctl(semid, i, GETPID, arg);
563			if (val < 0 \|\| ncnt < 0 \|\| zcnt < 0 \|\| pid < 0) {
564			bb_perror_msg_and_die("semctl");
565			}
566			printf("%-10d %-10d %-10d %-10d %-10d\n", i, val, ncnt, zcnt, pid);
567			}
568			puts("");
569			}
570
571			int ipcs_main(int argc, char **argv)
572			{
573			int id = 0;
574			unsigned flags = 0;
575			unsigned opt;
576			char *opt_i;
577			#define flag_print (1<<0)
578			#define flag_msg (1<<1)
579			#define flag_sem (1<<2)
580			#define flag_shm (1<<3)
581
582			opt = getopt32(argc, argv, "i:aqsmtcplu", &opt_i);
583			if (opt & 0x1) { // -i
584			id = xatoi(opt_i);
585			flags \|= flag_print;
586			}
587			if (opt & 0x2) flags \|= flag_msg \| flag_sem \| flag_shm; // -a
588			if (opt & 0x4) flags \|= flag_msg; // -q
589			if (opt & 0x8) flags \|= flag_sem; // -s
590			if (opt & 0x10) flags \|= flag_shm; // -m
591			if (opt & 0x20) format = TIME; // -t
592			if (opt & 0x40) format = CREATOR; // -c
593			if (opt & 0x80) format = PID; // -p
594			if (opt & 0x100) format = LIMITS; // -l
595			if (opt & 0x200) format = STATUS; // -u
596
597			if (flags & flag_print) {
598			if (flags & flag_shm) {
599			print_shm(id);
600			fflush_stdout_and_exit(0);
601			}
602			if (flags & flag_sem) {
603			print_sem(id);
604			fflush_stdout_and_exit(0);
605			}
606			if (flags & flag_msg) {
607			print_msg(id);
608			fflush_stdout_and_exit(0);
609			}
610			bb_show_usage();
611			}
612
613			if (!(flags & (flag_shm \| flag_msg \| flag_sem)))
614			flags \|= flag_msg \| flag_shm \| flag_sem;
615			puts("");
616
617			if (flags & flag_shm) {
618			do_shm();
619			puts("");
620			}
621			if (flags & flag_sem) {
622			do_sem();
623			puts("");
624			}
625			if (flags & flag_msg) {
626			do_msg();
627			puts("");
628			}
629			fflush_stdout_and_exit(0);
630			}