explain_unsetenv_or_die(3) Library Functions Manual explain_unsetenv_or_die(3) 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 call- ing exit(EXIT_FAILURE). The explain_unsetenv_on_error function is used to call the unsetenv(3) sys- tem 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 un- setenv(3) for more information. On failure, prints an explanation and ex- its, 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 1.3 Copyright (C) 2010 Peter Miller explain_unsetenv_or_die(3)
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | EXAMPLE | SEE ALSO | COPYRIGHT
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