52 lines
1.0 KiB
C
52 lines
1.0 KiB
C
#include "tests.h"
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/shm.h>
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static int id = -1;
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static void
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cleanup(void)
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{
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shmctl(id, IPC_RMID, NULL);
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id = -1;
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}
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#ifdef __alpha__
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# define SHMAT "osf_shmat"
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#else
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# define SHMAT "shmat"
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#endif
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int
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main(void)
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{
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id = shmget(IPC_PRIVATE, 1, 0600);
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if (id < 0)
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perror_msg_and_skip("shmget");
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atexit(cleanup);
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shmat(id, NULL, SHM_REMAP);
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printf("%s(%d, NULL, SHM_REMAP) = -1 %s (%m)\n",
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SHMAT, id, errno == ENOSYS ? "ENOSYS" : "EINVAL");
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void *shmaddr = shmat(id, NULL, SHM_RDONLY);
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if (shmaddr == (void *)(-1))
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perror_msg_and_skip("shmat SHM_RDONLY");
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printf("%s(%d, NULL, SHM_RDONLY) = %p\n", SHMAT, id, shmaddr);
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if (shmdt(shmaddr))
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perror_msg_and_skip("shmdt");
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printf("shmdt(%p) = 0\n", shmaddr);
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void *shmaddr2 = shmat(id, shmaddr, 0);
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if (shmaddr2 == (void *)(-1))
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perror_msg_and_skip("shmat %p", shmaddr);
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printf("%s(%d, %p, 0) = %p\n",
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SHMAT, id, shmaddr, shmaddr2);
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puts("+++ exited with 0 +++");
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return 0;
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}
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