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	/* 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	}