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#include "tests.h"
#include <stdio.h>
#include <stdlib.h>
#include <sys/shm.h>
static int id = -1;
static void
cleanup(void)
{
shmctl(id, IPC_RMID, NULL);
id = -1;
}
#ifdef __alpha__
# define SHMAT "osf_shmat"
#else
# define SHMAT "shmat"
#endif
int
main(void)
{
static const int bogus_shmid = 0xfdb97531;
static const void * const bogus_shmaddr =
(void *) (unsigned long) 0xdec0ded1dec0ded2ULL;
static const int bogus_shmflg = 0xffffface;
long rc;
id = shmget(IPC_PRIVATE, 1, 0600);
if (id < 0)
perror_msg_and_skip("shmget");
atexit(cleanup);
rc = (long) shmat(bogus_shmid, bogus_shmaddr, bogus_shmflg);
printf("%s(%d, %p, SHM_REMAP|SHM_RDONLY|SHM_RND|%#x) = %s\n",
SHMAT, bogus_shmid, bogus_shmaddr, bogus_shmflg & ~0x7000,
sprintrc(rc));
shmat(id, NULL, SHM_REMAP);
printf("%s(%d, NULL, SHM_REMAP) = -1 %s (%m)\n",
SHMAT, id, errno2name());
void *shmaddr = shmat(id, NULL, SHM_RDONLY);
if (shmaddr == (void *)(-1))
perror_msg_and_skip("shmat SHM_RDONLY");
printf("%s(%d, NULL, SHM_RDONLY) = %p\n", SHMAT, id, shmaddr);
rc = shmdt(NULL);
printf("shmdt(NULL) = %s\n", sprintrc(rc));
if (shmdt(shmaddr))
perror_msg_and_skip("shmdt");
printf("shmdt(%p) = 0\n", shmaddr);
++shmaddr;
void *shmaddr2 = shmat(id, shmaddr, SHM_RND);
if (shmaddr2 == (void *)(-1))
printf("%s(%d, %p, SHM_RND) = -1 %s (%m)\n",
SHMAT, id, shmaddr, errno2name());
else
printf("%s(%d, %p, SHM_RND) = %p\n",
SHMAT, id, shmaddr, shmaddr2);
puts("+++ exited with 0 +++");
return 0;
}
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