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explain_unsetenv_or_die

explain_unsetenv_or_die

Section: C Library Functions (3)
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NAME

explain_unsetenv_or_die - remove an environment variable and report errors  

SYNOPSIS

#include <libexplain/unsetenv.h>

void explain_unsetenv_or_die(const char *name);
int explain_unsetenv_on_error(const char *name);  

DESCRIPTION

The explain_unsetenv_or_die function is used to call the unsetenv(3) system call. On failure an explanation will be printed to stderr, obtained from the explain_unsetenv(3) function, and then the process terminates by calling exit(EXIT_FAILURE).

The explain_unsetenv_on_error function is used to call the unsetenv(3) system call. On failure an explanation will be printed to stderr, obtained from the explain_unsetenv(3) function, but still returns to the caller.

name
The name, exactly as to be passed to the unsetenv(3) system call.
 

RETURN VALUE

The explain_unsetenv_or_die function only returns on success, see unsetenv(3) for more information. On failure, prints an explanation and exits, it does not return.

The explain_unsetenv_on_error function always returns the value return by the wrapped unsetenv(3) system call.  

EXAMPLE

The explain_unsetenv_or_die function is intended to be used in a fashion similar to the following example:
explain_unsetenv_or_die(name);
 

SEE ALSO

unsetenv(3)
change or add an environment variable
explain_unsetenv(3)
explain unsetenv(3) errors
exit(2)
terminate the calling process
 

COPYRIGHT

libexplain version 0.37
Copyright (C) 2010 Peter Miller


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
EXAMPLE
SEE ALSO
COPYRIGHT

This document was created by man2html, using the manual pages.
Time: 21:45:53 GMT, April 16, 2011