Power-Programmierung/CD2.mdf/c/library/os2/gtak/source/os2-st01/trace.c

C/C++ Source or Header | 1992-05-23 | 553 b | 29 lines

#include <stdio.h>
#include <stdlib.h>
#define INCL_DOSFILEMGR
#define INCL_DOSDEVICES
#include <os2.h>

main(int argc, char **argv)
{
    HFILE    hdev;
    USHORT    action, rc;
    BYTE    level = 1;

    if (argc > 1)
        level = atoi(argv[1]);
    rc = DosOpen("TAPE$4", &hdev, &action, 0L, 0,
        FILE_OPEN, OPEN_ACCESS_READWRITE+OPEN_SHARE_DENYNONE, 0L);
    if (rc) {
        printf("open: %d\n", rc);
        exit(1);
    }
    rc = DosDevIOCtl2(NULL, 0, &level, 1, 0x04, 0x80, hdev);
    if (rc) {
        printf("ioctl sense: %d\n", rc);
        exit(1);
    }
    DosClose(hdev);
}