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POSIX

POSIX is a registered trademark from the IEEE. The following assertions are derived from copyrighted material. Original text and copyright information can be found at http://www.opengroup.org.

Here is what POSIX requires for this function:

1. When the semaphore is referenced by other processes, the function has no effect on the state of the semaphore.
   
2. Destruction of the semaphore is postponed until all process which were using the semaphore have called sem_close, _exit or exec.
   
3. Call to sem_open with the same name refer to a new semaphore, once sem_unlink has been called.
   
4. sem_unlink does not block.
   
5. sem_unlink returns 0 on success.
   
6. sem_unlink returns -1 and sets errno to EACCESS when the process has not privilege to unlink the semaphore.
   
7. sem_unlink returns -1 and sets errno to ENAMETOOLONG when the semaphore name lenght is greater than PATH_MAX or a component length is greater than NAME_MAX.
   
8. sem_unlink returns -1 and sets errno to ENOENT when the named semaphore does not exist.
   

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Conformance Status

• Assertion 1 is not tested yet. A new testcase will be written.
  
• Assertion 2 is poorly tested. A new testcase will be written.
  
• Assertion 3 is not tested yet. A new testcase will be written.
  
• Assertion 4 is not tested yet. A new testcase will be written.
  
• Assertion 5 is impliciteely tested in other testcases.
  
• Assertion 6 is not tested yet. A new testcase will be written.
  
• Assertion 7 is not tested yet. A new testcase will be written.
  
• Assertion 8 is not tested yet. A new testcase will be written.
  

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Scalability and Stress Status

No scalability or stress test will be written for this function.

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Conformance Test

The following test cases have been added to OPTS:

• 9-1.c
  
• 2-2.c
  
• 6-1.c
  
• 7-1.c
  
• 3-1.c
  
• 5-1.c
  
• 4-2.c