Detaches a process from a shared memory area.
Syntax |
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#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
int shmdt (char *shmaddr);
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Parameters |
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- shmaddr
Passes the address of the shared memory area (returned from
a call to shmat()).
Return Values |
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- 0
Success.
- -1
An error occurred, and errno is set to indicate the error condition.
Description |
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The shmdt() function detaches a shared memory area from the calling process's data area. The address of the shared memory area is specified by shmaddr (returned from a call to shmat()).
Implementation Considerations |
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None.
Errors |
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If an error occurs, errno is set to one of the following values.
| EINVAL | CAUSE
| shmaddr is not the data area start address of a shared memory area. |
| | ACTION
| Check to see that shmaddr is equal to the value returned by a previous shmat() call.
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| ESYSERR | CAUSE
| An operating system error occurred that does not map directly
to any of the above errors. |
| | ACTION
| Examine the MPE/iX process error stack for the type of system error.
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See Also |
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shmat(), shmctl(), shmget(), SVID2 (Section 12)
