gv_fopen.h File Reference

wrapper around fopen for internal library usage More...

#include <stdio.h>

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Macros
#define	UTIL_API   /* nothing */

Functions
UTIL_API FILE *	gv_fopen (const char *filename, const char *mode)

Macro Definition Documentation

UTIL_API

#define UTIL_API   /* nothing */

hide the symbols this header declares by default

The expectation is that users of this header (applications, shared libraries, or static libraries) want to call gv_fopen but not re-export it to their users. This annotation is only correct while the containing library is built statically. If it were built as a shared library, gv_fopen would need to have default visibility (and thus be unavoidably re-exported) in order to be callable.

Definition at line 18 of file gv_fopen.h.

Function Documentation

gv_fopen()

UTIL_API FILE * gv_fopen	(	const char *	filename,
		const char *	mode
	)

open a file, setting close-on-exec

Generally, library code should set close-on-exec (O_CLOEXEC) on file descriptors it creates to avoid child processes of concurrent fork+exec operations accidentally inheriting copies of the descriptors. It is tricky to achieve this without races. This function attempts to avoid the common problems when trying to do this with fopen.

Parameters

filename	A filename, as you would pass to fopen
mode	A mode, as you would pass to fopen

Returns

A file handle with close-on-exit set on success or NULL on failure

Definition at line 31 of file gv_fopen.c.

References err, flags, fopen_(), and NULL.

Referenced by gvNextInputGraph(), and nextFile().

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