I'm trying to get the name of the current printer using the libcups library in Linux, but I can't find such a method. I found only how to get a complete list of printers, but how to find out which one will print is not clear.
#include <cups/cups.h>
QStringList getPrinters()
{
QStringList printerNames;
cups_dest_t *dests;
int num_dests = cupsGetDests(&dests);
for (int pr = 0; pr < num_dests; ++pr) {
QString printerName = QString::fromUtf8(dests[pr].name);
printerNames.append(printerName);
}
cupsFreeDests(num_dests, dests);
return printerNames;
}
Once you have a valid destination (cups_dest_t), one can retrieve the informations via: cupsGetOption
Example (from https://openprinting.github.io/cups/doc/cupspm.html#basic-destination-information):
const char *model = cupsGetOption("printer-make-and-model",
dest->num_options,
dest->options);
To find the default printer one can use:
Other suggestion would be:
Last but not least:
Sidenote:
Since you're using Qt, doesn't Qt have printer support?
E.g.
QPrinter::QPrinter(const QPrinterInfo &printer, QPrinter::PrinterMode mode = ScreenResolution);
(see https://doc.qt.io/qt-6/qprinter.html#QPrinter-1)
and
bool QPrinterInfo::isDefault() const;