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Looking at the man page for fopen I cannot get a definite answer to this question. 

FILE *fopen(const char *path, const char *mode);

I understand that fopen returns a file pointer to a stream but is a file descriptor created as a byproduct? I am trying to make sure that I include the flag FD_CLOEXEC on every instance a file descriptor is created. If a file descriptor is in fact created from fopen what is the best way to use fnctl() when there is no "fd" to use as input.

Thanks.

Eric Dand
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Jon Kump
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1 Answers1

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On Unix (which I assume you're using because you're mentioning fcntl) it does open a file descriptor, as fopen(3) eventually calls open(2). You can get that file descriptor via fileno(3).

cnicutar
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