02-24-2010
Quote:
do_something > tmpfile
cp tmpfile orgfile && rm tmpfile
Personally I would null the file after copying the file rather than deleting the file.
We could check whether the file is open with unix command "fuser" but the output from this command is not consistent across platforms and it is easier to assume that the file is open.
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=========================
#last
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LEARN ABOUT DEBIAN
explain_tmpfile_or_die
explain_tmpfile_or_die(3) Library Functions Manual explain_tmpfile_or_die(3)
NAME
explain_tmpfile_or_die - create a temporary file and report errors
SYNOPSIS
#include <libexplain/tmpfile.h>
FILE *explain_tmpfile_or_die(void);
FILE *explain_tmpfile_on_error(void);
DESCRIPTION
The explain_tmpfile_or_die function is used to call the tmpfile(3) system call. On failure an explanation will be printed to stderr,
obtained from the explain_tmpfile(3) function, and then the process terminates by calling exit(EXIT_FAILURE).
The explain_tmpfile_on_error function is used to call the tmpfile(3) system call. On failure an explanation will be printed to stderr,
obtained from the explain_tmpfile(3) function, but still returns to the caller.
RETURN VALUE
The explain_tmpfile_or_die function only returns on success, see tmpfile(3) for more information. On failure, prints an explanation and
exits, it does not return.
The explain_tmpfile_on_error function always returns the value return by the wrapped tmpfile(3) system call.
EXAMPLE
The explain_tmpfile_or_die function is intended to be used in a fashion similar to the following example:
FILE *result = explain_tmpfile_or_die();
SEE ALSO
tmpfile(3)
create a temporary file
explain_tmpfile(3)
explain tmpfile(3) errors
exit(2) terminate the calling process
COPYRIGHT
libexplain version 0.52
Copyright (C) 2009 Peter Miller
explain_tmpfile_or_die(3)