C Language and Libraries Help (clang.hlp) (Table of Contents; Topic list)
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_getpid
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─────Run-Time Library───────────────────────────────────────────────────────
 
     The _getpid function returns the process ID, an integer that
     uniquely identifies the calling process.
 
     Return Value
 
     The _getpid function returns the process ID. There is no error
     return.
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