11-04-2002
ANSI C vs POSIX
can somebody explain about the ANSI C vs POSIX. say i was using open and fopen, i know that open is POSIX, and fopen is ANSI C. i read that that POSIX is a system call and ANSI C is like a standard library function. wouldn't the fopen function has to call on open function anyway to open any kind of file? what's the difference between using open and fopen?
I guess i'm not sure what system call mean.
any article about the difference between the two will be very helpful.
thanks.
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LEARN ABOUT DEBIAN
explain_fopen_or_die
explain_fopen_or_die(3) Library Functions Manual explain_fopen_or_die(3)
NAME
explain_fopen_or_die - open file and report errors
SYNOPSIS
#include <libexplain/fopen.h>
FILE *explain_fopen_or_die(const char *pathname, const char *flags);
DESCRIPTION
The explain_fopen_or_die() function opens the file whose name is the string pointed to by pathname and associates a stream with it. See
fopen(3) for more information.
This is a quick and simple way for programs to constitently report file open errors in a consistent and detailed fahion.
RETURN VALUE
Upon successful completion explain_fopen_or_die returns a FILE pointer.
If an error occurs, explain_fopen will be called to explain the error, which will be printed onto stderr, and then the process will termi-
nate by calling exit(EXIT_FAILURE).
SEE ALSO
fopen(3)
stream open functions
explain_fopen(3)
explain fopen(3) errors
exit(2) terminate the calling process
COPYRIGHT
libexplain version 0.52
Copyright (C) 2008 Peter Miller
AUTHOR
Written by Peter Miller <pmiller@opensource.org.au>
explain_fopen_or_die(3)