a17989470a
(c) 2010 Invisible Things Lab Authors: ========= Joanna Rutkowska <joanna@invisiblethingslab.com> Rafal Wojtczuk <rafal@invisiblethingslab.com>
88 lines
2.0 KiB
C
88 lines
2.0 KiB
C
/*
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* The Qubes OS Project, http://www.qubes-os.org
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*
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* Copyright (C) 2010 Rafal Wojtczuk <rafal@invisiblethingslab.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#include <stdio.h>
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#include <unistd.h>
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#include <sys/inotify.h>
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#include <fcntl.h>
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#include <stdlib.h>
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int parse_events(char *buf, int len)
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{
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int i = 0;
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while (i < len) {
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struct inotify_event *ev = (struct inotify_event *)(buf + i);
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if ((ev->mask & IN_UNMOUNT) || (ev->mask & IN_IGNORED))
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return 1;
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i += sizeof(struct inotify_event) + ev->len;
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}
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return 0;
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}
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#define BUFLEN 1024
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void wait_for_umount(char *name)
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{
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char buf[BUFLEN];
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int fd = inotify_init();
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int len;
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int ret = inotify_add_watch(fd, name, IN_ATTRIB);
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if (ret < 0) {
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perror("inotify_add_watch");
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return;
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}
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for (;;) {
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len = read(fd, buf, BUFLEN - 1);
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if (len <= 0) {
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perror("read inotify");
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return;
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}
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if (parse_events(buf, len))
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return;
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}
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}
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void background()
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{
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int i, fd;
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for (i = 0; i < 256; i++)
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close(i);
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fd = open("/dev/null", O_RDWR);
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for (i = 0; i <= 2; i++)
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dup2(fd, i);
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switch (fork()) {
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case -1:
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exit(1);
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case 0: break;
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default:
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exit(0);
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}
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}
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#define MOUNTDIR "/mnt/incoming"
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int main()
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{
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background();
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if (!system("su - user -c 'mount " MOUNTDIR "'"))
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wait_for_umount(MOUNTDIR "/.");
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system("xenstore-write device/qpen umount");
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return 0;
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}
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