xstream.c

/**
 * continuous dump from binary stream
 * $ tail -f xxx | xstream
 */

#include <stdio.h>
#include <stdint.h>

void xstreamer(FILE *fdin, FILE *fdout) {
    int     col = 0;
    int     n;
    uint8_t buf[512];
    int     cap = sizeof(buf);

    while((n = fread(buf, 1, cap, fdin)) > 0)
    {
        uint8_t *p = buf;
        while (n--) {
            fprintf(fdout, "%02x ", *(p++));
            if (++ col == 0x10) {
                fprintf(fdout, "\r\n");
                col = 0;
            }
        }
        fflush(fdout);
    }
}

int main(int argc, char** argv) {
    xstreamer(stdin, stdout);
    return 0;
}