wincreatetempfile1.c - Cygwin FILE_ATTRIBUTE_TEMPORARY test
Posted by Anonymous on Wed 17th Apr 2024 00:52
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/*
 * wincreatetempfile1.c - Cygwin FILE_ATTRIBUTE_TEMPORARY test
 *
 * Usage:
 * $ gcc -Wall wincreatetempfile1.c -o wincreatetempfile1
 * $ rm -f xxx ; ./wincreatetempfile1 xxx yyy zzz 000 111 ; cat -n xxx
 * ./wincreatetempfile1: h=0x0x150
 * ./wincreatetempfile1: fd 3
 *      1  yyyzzz000111
 *
 * Written by Roland Mainz <roland.mainz@nrubsig.org>
 */

#include <windows.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/cygwin.h>

int main(int ac, char *av[])
{
    HANDLE h = CreateFile(
        av[1],
        GENERIC_READ | GENERIC_WRITE,
        0,
        NULL,
        CREATE_NEW,
        FILE_ATTRIBUTE_TEMPORARY,
        NULL);

    if (h == INVALID_HANDLE_VALUE) {
        DWORD err = GetLastError();
        (void)fprintf(stderr, "%s: error %d\n", av[0], err);
        return 1;
    }

    (void)printf("%s: h=0x%p\n", av[0], (void *)h);

    int fd = cygwin_attach_handle_to_fd(av[1], -1, h, 1, O_RDWR);

    (void)printf("%s: fd %d\n", av[0], fd);
    for(int i = 2 ; i < ac ; i++) {
        (void)write(fd, av[i], strlen(av[i]));
    }

    (void)close(fd);

    return 0;
}