explain_putenv_or_die man page
explain_putenv_or_die — change or add an environment variable and report errors
void explain_putenv_or_die(char *string);
int explain_putenv_on_error(char *string);
The explain_putenv_or_die function is used to call the putenv(3) system call. On failure an explanation will be printed to stderr, obtained from the explain_putenv(3) function, and then the process terminates by calling
The explain_putenv_on_error function is used to call the putenv(3) system call. On failure an explanation will be printed to stderr, obtained from the explain_putenv(3) function, but still returns to the caller.
The string, exactly as to be passed to the putenv(3) system call.
The explain_putenv_or_die function only returns on success, see putenv(3) for more information. On failure, prints an explanation and exits, it does not return.
The explain_putenv_on_error function always returns the value return by the wrapped putenv(3) system call.
The explain_putenv_or_die function is intended to be used in a fashion similar to the following example:
change or add an environment variable
explain putenv(3) errors
terminate the calling process
libexplain version 1.4
Copyright (C) 2010 Peter Miller