15.2.2.5. Parsing the Command-Line Options

⁠15.2.2.5. Parsing the Command-Line Options

Once you have set up a poptGetContext, you need to iterate over all the command-line parameters. To do this, call poptGetNextOpt:

int poptGetNextOpt(poptContext context);

If an error occurs, poptGetNextOpt returns a negative error code. If the context is at the end of the options, poptGetNextOpt returns –1. Table 16-7 lists the error codes:

Table 16-7 Error codes from poptGetNextOpt

Code	Meaning
POPT_ERROR_NOARG	Option requires an argument, but it is missing
POPT_ERROR_BADOPT	Argument could not be parsed
POPT_ERROR_OPTSTOODEEP	Aliases are nested too deeply
POPT_ERROR_BADQUOTE	Start and end quotation marks don't match
POPT_ERROR_BADNUMBER	Argument could not be converted to a number
POPT_ERROR_OVERFLOW	Argument number was too big or too small
POPT_ERROR_ERRNO	A system call returned an error in errno