parted_test.c

#include <parted/parted.h>
#include <parted/device.h>
#include <parted/debug.h>

#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <limits.h>

#include <stdio.h>

int check_card_size(char const *dev_name);

int main (int argc) {
    while(true) {
        char const *dev_name = "/dev/sdc";
        check_card_size(dev_name);
        printf("Change card and press enter to continue.\n");
        char input = getchar();
        sleep(3);
    }

    return 0;
}

int check_card_size(char const *dev_name) {
    PedGeometry geom;
    PedDevice *dev = ped_device_get(dev_name);

    if (!dev) {
        fprintf(stderr, "cannot create device %s\n", dev_name);
        return 1;
    }

    if (!ped_device_open(dev)) {
        fprintf(stderr, "cannot open device %s\n", dev_name);
        return 1;
    }

    if (!ped_geometry_init(&geom, dev, 0, dev->length)) {
        fprintf(stderr, "cannot initialize geometry\n");
        return 1;
    }

    printf("size: %d\n", dev->length);
    /* Flush cache to force parted to reread the device */
    ped_device_cache_remove(dev);
}