C Language and Libraries Help (clang.hlp) (Table of Contents; Topic list)
tmpfile
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─────Run-Time Library───────────────────────────────────────────────────────
 
     The tmpfile function creates a temporary file and returns a
     pointer to that stream. If the file cannot be opened, tmpfile
     returns a NULL pointer.
 
     This temporary file is automatically deleted when the file is
     closed, when the program terminates normally, or when _rmtmp is
     called, assuming that the current working directory does not
     change. The temporary file is opened in w+b (binary read/write)
     mode.
 
     Return Value
 
     If successful, the tmpfile function returns a stream pointer.
     Otherwise, it returns a NULL pointer.
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