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/*-------------------------------------------------------------------------
*
* tstshm.c
* Test of System V Shared Memory Emulation
*
* Copyright (c) 1999, repas AEG Automation GmbH
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/port/qnx4/tstshm.c,v 1.5 2003/11/29 19:51:54 pgsql Exp $
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include <unistd.h>
#include <sys/shm.h>
int
main(int argc, char **argv)
{
int c,
errflg = 0;
char s[80];
key_t key = 0x1000;
size_t size = 256;
int shmid = -1;
caddr_t addr = NULL;
optarg = NULL;
while (!errflg && (c = getopt(argc, argv, "k:s:")) != -1)
{
switch (c)
{
case 'k':
key = atoi(optarg);
break;
case 's':
size = atoi(optarg);
break;
default:
errflg++;
}
}
if (errflg)
{
printf("usage: tstshm [-k key] [-s size]\n");
exit(1);
}
do
{
printf("shm(g)et, shm(a)t, shm(d)t, shm(c)tl, (w)rite, (r)ead, e(x)it: ");
scanf("%s", s);
switch (s[0])
{
case 'g':
shmid = shmget(key, size, IPC_CREAT | SHM_R | SHM_W);
if (shmid == -1)
perror("shmget");
break;
case 'a':
addr = shmat(shmid, NULL, 0);
if (addr == (void *) -1)
perror("shmat");
break;
case 'd':
if (shmdt(addr) == -1)
perror("shmdt");
else
addr = NULL;
break;
case 'c':
if (shmctl(shmid, IPC_RMID, NULL) == -1)
perror("shmctl");
else
shmid = -1;
break;
case 'w':
printf("String to write: ");
scanf("%s", addr);
break;
case 'r':
puts(addr);
break;
}
}
while (s[0] != 'x');
return 0;
}
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