#include "unpipc.h"

int main(int argc, char** argv)
{
   int c, id, oflag;
   char* ptr;
   size_t length;
   
   oflag = SVSHM_MODE | IPC_CREAT;
   
   while ((c = Getopt(argc, argv, "e")) != - 1 )
   {
   
         switch(c)
         {
         
             case 'e':
                  oflag |= IPC_EXCL;
             break;
         }
   }
   if (optind != argc -  2 )
          err_quit("usage: shmget [ -e ] <pathname> <length>");
   length = atoi(argv[optind +  1 ]);

   id = Shmget(ftok(argv[optind],  0 ), length, oflag);
   ptr = shmat(id, NULL, 0 );
   exit( 0 );

}

//lib/unpipc.h

/* Íàø çàãîëîâî÷íûé ôàéë. */



#ifndef	__unpipc_h

#define	__unpipc_h



#include	"../config.h"	/* ïàðàìåòðû êîíôèãóðàöèè ÎÑ */

							/* "../config.h" ñîçäàåòñÿ ñöåíàðèåì configure */



/* èçìåíÿÿ ñïèñîê äèðåêòèâ #include, íóæíî èçìåíÿòü ôàéëû

   ../aclocal.m4 è ../configure.in, ÷òîáû ðàáîòàë ñöåíàðèé configure */



#include	<sys/types.h>	/* áàçîâûå òèïû äàííûõ */

#include	<sys/time.h>	/* ñòðóêòóðà timeval{} äëÿ select() */

#include	<time.h>		/* timespec{} äëÿ pselect() */

#include	<errno.h>

#include	<fcntl.h>		/* îòêëþ÷åíèå áëîêèðîâêè */

#include	<limits.h>		/* PIPE_BUF */

#include	<signal.h>

#include	<stdio.h>

#include	<stdlib.h>

#include	<string.h>

#include	<sys/stat.h>	/* êîíñòàíòû ðåæèìà äîñòóïà ê ôàéëó S_xxx */

#include	<unistd.h>

#include	<sys/wait.h>



#ifdef	HAVE_MQUEUE_H

# include	<mqueue.h>		/* î÷åðåäè ñîîáùåíèé Posix */

#endif



#ifdef	HAVE_SEMAPHORE_H

# include	<semaphore.h>	/* ñåìàôîðû Posix */



#ifndef	SEM_FAILED

#define	SEM_FAILED	((sem_t *)(- 1 ))

#endif



#endif



#ifdef	HAVE_SYS_MMAN_H

# include	<sys/mman.h>	/* ðàçäåëÿåìàÿ ïàìÿòü Posix */

#endif



#ifndef	MAP_FAILED

#define	MAP_FAILED	((void *)(- 1 ))

#endif



#ifdef	HAVE_SYS_IPC_H

# include	<sys/ipc.h>		/* System V IPC */

#endif



#ifdef	HAVE_SYS_MSG_H

# include	<sys/msg.h>		/* î÷åðåäè ñîîáùåíèé System V */

#endif



#ifdef	HAVE_SYS_SEM_H

#ifdef	__bsdi__

#undef	HAVE_SYS_SEM_H		/* òîíêèé ìîìåíò: ïðîòîòèï semctl() â BSDI's ñîäåðæèò îøèáêè*/

#else

# include	<sys/sem.h>		/* ñåìàôîðû System V */

#endif



#ifndef	HAVE_SEMUN_UNION

/* $$.It semun$$ */

union semun {				/* îïðåäåëåíèå îáúåäèíåíèÿ äëÿ semctl() */

  int              val;

  struct semid_ds *buf;

  unsigned short  *array;

};

#endif

#endif	/* HAVE_SYS_SEM_H */



#ifdef	HAVE_SYS_SHM_H

# include	<sys/shm.h>		/* ðàçäåëÿåìàÿ ïàìÿòü System V */

#endif



#ifdef	HAVE_SYS_SELECT_H

# include	<sys/select.h>	/* äëÿ óäîáñòâà */

#endif



#ifdef	HAVE_POLL_H

# include	<poll.h>		/* äëÿ óäîáñòâà */

#endif



#ifdef	HAVE_STROPTS_H

# include	<stropts.h>		/* äëÿ óäîáñòâà */

#endif



#ifdef	HAVE_STRINGS_H

# include	<strings.h>		/* äëÿ óäîáñòâà */

#endif



/* Ñëåäóþùèå òðè çàãîëîâî÷íûõ ôàéëà íóæíû äëÿ ioctl ôàéëîâ è ñîêåòîâ:

 * <sys/ioctl.h>, <sys/filio.h>, è <sys/sockio.h>.

 */

#ifdef	HAVE_SYS_IOCTL_H

# include	<sys/ioctl.h>

#endif

#ifdef	HAVE_SYS_FILIO_H

# include	<sys/filio.h>

#endif



#ifdef	HAVE_PTHREAD_H

# include	<pthread.h>

#endif



#ifdef	HAVE_DOOR_H

# include	<door.h>		/* èíòåðôåéñ äâåðåé Solaris */

#endif



#ifdef	HAVE_RPC_RPC_H

#ifdef _PSX4_NSPACE_H_TS	/* áàãè Digital Unix 4.0b */

#undef	SUCCESS

#endif

# include	<rpc/rpc.h>		/* Sun RPC */

#endif



/* Îïðåäåëÿåì bzero() êàê ìàêðîñ åñëè åãî íåò â ñòàíäàðòíîé áèáëèîòåêå Ñ */

#ifndef	HAVE_BZERO

#define	bzero(ptr,n)		memset(ptr,  0 , n)

#endif



/* Posix.1g òðåáóåò, ÷òîáû INFTIM îïðåäåëÿëîñü â <poll.h>, íî âî ìíîãèõ ñèñòåìàõ ýòà êîíñòàíòà âñå åùå îïðåäåëÿåòñÿ â <sys/stropts.h>. Íàì íå íóæíî ïîäêëþ÷àòü âñå ôóíêöèè äëÿ ðàáîòû ñ ïîòîêàìè, ïîýòîìó ìû îïðåäåëÿåì INFTM çäåñü. Ýòî ñòàíäàðòíîå çíà÷åíèå, íî íåò ãàðàíòèé, ÷òî îíî ðàâíî -1 */

#ifndef INFTIM

#define INFTIM          (- 1 )    /* íåîãðàíè÷åííîå âðåìÿ îïðîñà */

#ifdef	HAVE_POLL_H

#define	INFTIM_UNPH				/* ÷òîáû èç ôàéëà unpxti.h óçíàòü, ÷òî êîíñòàíòà îïðåäåëåíà */

#endif

#endif



/* Ïðî÷èå êîíñòàíòû */

#ifndef	PATH_MAX			/* äîëæíà áûòü â <limits.h> */

#define	PATH_MAX	 1024 	/* ìàêñèìàëüíîå êîëè÷åñòâî ñèìâîëîâ â ïîëíîì èìåíè ôàéëà */

#endif



#define	MAX_PATH	 1024 

#define	MAXLINE		 4096 	/* ìàêñèìàëüíàÿ äëèíà ñòðîêè */

#define	BUFFSIZE	 8192 	/* îáúåì áóôåðà ÷òåíèÿ è çàïèñè */



#define	FILE_MODE	(S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)

					/* ðàçðåøåíèÿ ïî óìîë÷àíèþ äëÿ íîâûõ ôàéëîâ */

#define	DIR_MODE	(FILE_MODE | S_IXUSR | S_IXGRP | S_IXOTH)

					/* ðàçðåøåíèÿ ïî óìîë÷àíèþ äëÿ íîâûõ êàòàëîãîâ */

#define	SVMSG_MODE	(MSG_R | MSG_W | MSG_R>> 3  | MSG_R>> 6 )

					/* ðàçðåøåíèÿ ïî óìîë÷àíèþ äëÿ íîâûõ î÷åðåäåé ñîîáùåíèé System V */

#define	SVSEM_MODE	(SEM_R | SEM_A | SEM_R>> 3  | SEM_R>> 6 )

					/* ðàçðåøåíèÿ ïî óìîë÷àíèþ äëÿ íîâûõ ñåìàôîðîâ System V */

#define	SVSHM_MODE	(SHM_R | SHM_W | SHM_R>> 3  | SHM_R>> 6 )

					/* ðàçðåøåíèÿ ïî óìîë÷àíèþ äëÿ íîâîé ðàçäåëÿåìîé ïàìÿòè System V */



typedef	void	Sigfunc(int);	/* äëÿ îáðàáîò÷èêîâ ñèãíàëîâ */



#ifdef	HAVE_SIGINFO_T_STRUCT

typedef	void	Sigfunc_rt(int, siginfo_t *, void *);

#endif



#define	min(a,b)	((a) < (b) ? (a) : (b))

#define	max(a,b)	((a) > (b) ? (a) : (b))



#ifndef	HAVE_TIMESPEC_STRUCT

struct timespec {

  time_t	tv_sec;		/* ñåêóíäû */

  long		tv_nsec;	/* è íàíîñåêóíäû */

};

#endif



/*

 ôóíêöèÿõ-îáåðòêàõ open(), mq_open(), sem_open() ìû îáðàáàòûâàåì äîïîëíèòåëüíûå àðãóìåíòû ñ ïîìîùüþ ìàêðîñîâ va_XXX(). Îäèí èç àðãóìåíòîâ èìååò òèï mode_t, ÷òî ïðèâîäèò ê îøèáêå â BSD/OS, ãäå äëÿ ýòîãî òèïà èñïîëüçóþòñÿ 16-ðàçðÿäíûå öåëûå. Ïðè âûçîâå îáåðòêè êîìïèëÿòîð ïðåîáðàçîâûâàåò 16-ðàçðÿäíîå öåëîå â 32-ðàçðÿäíîå. Ïîýòîìó è íåîáõîäèìî òî, ÷òî ñäåëàíî íèæå.

 */



#ifdef	__bsdi__

#define	va_mode_t	int

#else

#define	va_mode_t	mode_t

#endif



		/* ìàêðîñû áëîêèðîâêè çàïèñåé */

#define	read_lock(fd, offset, whence, len) \

			lock_reg(fd, F_SETLK, F_RDLCK, offset, whence, len)

#define	readw_lock(fd, offset, whence, len) \

			lock_reg(fd, F_SETLKW, F_RDLCK, offset, whence, len)

#define	write_lock(fd, offset, whence, len) \

			lock_reg(fd, F_SETLK, F_WRLCK, offset, whence, len)

#define	writew_lock(fd, offset, whence, len) \

			lock_reg(fd, F_SETLKW, F_WRLCK, offset, whence, len)

#define	un_lock(fd, offset, whence, len) \

			lock_reg(fd, F_SETLK, F_UNLCK, offset, whence, len)

#define	is_read_lockable(fd, offset, whence, len) \

			lock_test(fd, F_RDLCK, offset, whence, len)

#define	is_write_lockable(fd, offset, whence, len) \

			lock_test(fd, F_WRLCK, offset, whence, len)

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