ipcs.c

Util-linux 软件包包含许多工具。其中比较重要的是加载、卸载、格式化、分区和管理硬盘驱动器

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

	case PID:
		break;

	default:
		printf (_("------ Semaphore Arrays --------\n"));
		printf (_("%-10s %-10s %-10s %-10s %-10s\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 %-10.9s", 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;
		}
	}
}


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 %-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;
}


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

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

	printf (_("\nShared memory Segment shmid=%d\n"), shmid);
	printf (_("uid=%d\tgid=%d\tcuid=%d\tcgid=%d\n"),
		ipcp->uid, ipcp->gid, ipcp->cuid, ipcp->cgid);
	printf (_("mode=%#o\taccess_perms=%#o\n"),
		ipcp->mode, ipcp->mode & 0777);
	printf (_("bytes=%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)
{
	struct msqid_ds buf;
	struct ipc_perm *ipcp = &buf.msg_perm;

	if (msgctl (msqid, IPC_STAT, &buf) == -1) {
		perror ("msgctl ");
		return;
	}
	printf (_("\nMessage Queue msqid=%d\n"), msqid);
	printf (_("uid=%d\tgid=%d\tcuid=%d\tcgid=%d\tmode=%#o\n"),
		ipcp->uid, ipcp->gid, ipcp->cuid, ipcp->cgid, ipcp->mode);
	printf (_("cbytes=%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;
	int i;

	arg.buf = &semds;
	if (semctl (semid, 0, IPC_STAT, arg) < 0) {
		perror ("semctl ");
		return;
	}
	printf (_("\nSemaphore Array semid=%d\n"), semid);
	printf (_("uid=%d\t gid=%d\t cuid=%d\t cgid=%d\n"),
		ipcp->uid, ipcp->gid, ipcp->cuid, ipcp->cgid);
	printf (_("mode=%#o, access_perms=%#o\n"),
		ipcp->mode, ipcp->mode & 0777);
	printf (_("nsems = %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) {
			perror ("semctl ");
			exit (1);
		}
		printf ("%-10d %-10d %-10d %-10d %-10d\n",
			i, val, ncnt, zcnt, pid);
	}
	printf ("\n");
	return;
}