01-18-2010
You want to check for errors on each line but do not want to check for errors on each line, shell remembers the last command status, you rather have to pipeline the process.
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---
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LEARN ABOUT DEBIAN
explain_fileno_or_die
explain_fileno_or_die(3) Library Functions Manual explain_fileno_or_die(3)
NAME
explain_fileno_or_die - check and reset stream status and report errors
SYNOPSIS
#include <libexplain/fileno.h>
int explain_fileno_or_die(FILE *fp);
int explain_fileno_on_error(FILE *fp);
DESCRIPTION
The explain_fileno_or_die function is used to call the fileno(3) system call. On failure an explanation will be printed to stderr, obtained
from the explain_fileno(3) function, and then the process terminates by calling exit(EXIT_FAILURE).
The explain_fileno_on_error function is used to call the fileno(3) system call. On failure an explanation will be printed to stderr,
obtained from the explain_fileno(3) function, but still returns to the caller.
fp The fp, exactly as to be passed to the fileno(3) system call.
RETURN VALUE
The explain_fileno_or_die function only returns on success, see fileno(3) for more information. On failure, prints an explanation and
exits, it does not return.
The explain_fileno_on_error function always returns the value return by the wrapped fileno(3) system call.
EXAMPLE
The explain_fileno_or_die function is intended to be used in a fashion similar to the following example:
explain_fileno_or_die(fp);
SEE ALSO
fileno(3)
check and reset stream status
explain_fileno(3)
explain fileno(3) errors
exit(2) terminate the calling process
COPYRIGHT
libexplain version 0.52
Copyright (C) 2009 Peter Miller
explain_fileno_or_die(3)