minix/test/ipc/shmt/shmt01.c
2009-09-21 14:53:53 +00:00

126 lines
2.5 KiB
C

/*
* NAME
* shmt01
*
* CALLS
* shmat(2) shmget(2) shmdt(2)
*
* ALGORITHM
* Create and attach a shared memory segment, write to it
* and then detach the shared memroy twice, the second one will FAIL.
*
*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/utsname.h>
#include <errno.h>
/** LTP Port **/
#include "test.h"
#include "usctest.h"
char *TCID="shmt01"; /* Test program identifier. */
int TST_TOTAL=4; /* Total number of test cases. */
extern int Tst_count; /* Test Case counter for tst_* routines */
/**************/
#define K_1 1024
int rm_shm(int);
int main(void)
{
register int shmid;
char *cp;
key_t key;
int r;
errno = 0;
key = (key_t)getpid() ;
/*----------------------------------------------------------------*/
if ((shmid = shmget(key, 16*K_1, IPC_CREAT|0666)) < 0 ) {
perror("shmget");
tst_resm(TFAIL, "shmget Failed: shmid = %d, errno = %d\n",
shmid, errno) ;
tst_exit() ;
}
tst_resm(TPASS, "shmget") ;
/*----------------------------------------------------------------*/
/* are we doing with ia64 or arm_arch_4t arch */
#if defined (__ia64__) || defined (__ARM_ARCH_4T__)
cp = (char *) shmat(shmid, (void *)NULL, 0);
#else
cp = (char *) shmat(shmid, (void *)0x80000, 0);
#endif
if (cp == (char *)-1) {
perror("shmat");
tst_resm(TFAIL, "shmat Failed: shmid = %d, errno = %d\n",
shmid, errno) ;
rm_shm(shmid) ;
tst_exit() ;
}
*cp = '1';
*(cp+1) = '2';
tst_resm(TPASS, "shmat") ;
/*----------------------------------------------------------------*/
r = shmdt(cp);
if (r < 0) {
perror("shmdt");
tst_resm(TFAIL, "shmdt Failed: shmid = %d, errno = %d\n",
shmid, errno);
rm_shm(shmid);
tst_exit();
}
tst_resm(TPASS, "shmdt first time.");
r = shmdt(cp);
if (r == 0) {
perror("shmdt");
tst_resm(TFAIL, "shmdt Failed: shmid = %d, errno = %d\n",
shmid, errno);
rm_shm(shmid);
tst_exit();
}
rm_shm(shmid) ;
tst_resm(TPASS, "shmdt second time.");
/*------------------------------------------------------------------*/
tst_exit() ;
/*-------------------- THIS LINE IS NOT REACHED -------------------*/
return(0);
}
int rm_shm(shmid)
int shmid ;
{
if (shmctl(shmid, IPC_RMID, NULL) == -1) {
perror("shmctl");
tst_resm(TFAIL,
"shmctl Failed to remove: shmid = %d, errno = %d\n",
shmid, errno) ;
tst_exit();
}
return(0);
}