(no commit message)

[vsys-wrappers.git] / fuse / stolen_from_fuse.c

diff --git a/fuse/stolen_from_fuse.c b/fuse/stolen_from_fuse.c
deleted file mode 100644 (file)
index 87fef01..0000000
--- a/fuse/stolen_from_fuse.c
+++ /dev/null
@@ -1,162 +0,0 @@
-#include <assert.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/mount.h>
-#include <sys/socket.h>
-#include <sys/un.h>
-#include "stolen_from_fuse.h"
-
-// Most of this code is stolen from FUSE 2.7.4
-
-/** Function to pass a file descriptor over a UNIX socket.
-  * 
-  * Sends the file descriptor fd over the channel sock_fd.
-  *
-  ***/
-int rrm_send_fd(int sock_fd, int fd)
-{
-       int retval;
-       struct msghdr msg;
-       struct cmsghdr *p_cmsg;
-       struct iovec vec;
-       size_t cmsgbuf[CMSG_SPACE(sizeof(fd)) / sizeof(size_t)];
-       int *p_fds;
-       char sendchar = 0;
-
-       msg.msg_control = cmsgbuf;
-       msg.msg_controllen = sizeof(cmsgbuf);
-       p_cmsg = CMSG_FIRSTHDR(&msg);
-       p_cmsg->cmsg_level = SOL_SOCKET;
-       p_cmsg->cmsg_type = SCM_RIGHTS;
-       p_cmsg->cmsg_len = CMSG_LEN(sizeof(fd));
-       p_fds = (int *) CMSG_DATA(p_cmsg);
-       *p_fds = fd;
-       msg.msg_controllen = p_cmsg->cmsg_len;
-       msg.msg_name = NULL;
-       msg.msg_namelen = 0;
-       msg.msg_iov = &vec;
-       msg.msg_iovlen = 1;
-       msg.msg_flags = 0;
-       /* "To pass file descriptors or credentials you need to send/read at
-        * least one byte" (man 7 unix) */
-       vec.iov_base = &sendchar;
-       vec.iov_len = sizeof(sendchar);
-       while ((retval = sendmsg(sock_fd, &msg, 0)) == -1 && errno == EINTR);
-       if (retval != 1) {
-               perror("sending file descriptor");
-               return -1;
-       }
-       return 0;
-}
-
-
-/* return value:
- * >= 0         => fd
- * -1   => error
- */
-int rrm_receive_fd(int fd)
-{
-       struct msghdr msg;
-       struct iovec iov;
-       char buf[1];
-       int rv;
-       size_t ccmsg[CMSG_SPACE(sizeof(int)) / sizeof(size_t)];
-       struct cmsghdr *cmsg;
-
-       iov.iov_base = buf;
-       iov.iov_len = 1;
-
-       msg.msg_name = 0;
-       msg.msg_namelen = 0;
-       msg.msg_iov = &iov;
-       msg.msg_iovlen = 1;
-       /* old BSD implementations should use msg_accrights instead of
-        * msg_control; the interface is different. */
-       msg.msg_control = ccmsg;
-       msg.msg_controllen = sizeof(ccmsg);
-
-       while(((rv = recvmsg(fd, &msg, 0)) == -1) && errno == EINTR);
-       if (rv == -1) {
-               perror("recvmsg");
-               return -1;
-       }
-       if(!rv) {
-               /* EOF */
-               return -1;
-       }
-
-       cmsg = CMSG_FIRSTHDR(&msg);
-       if (!cmsg->cmsg_type == SCM_RIGHTS) {
-               fprintf(stderr, "got control message of unknown type %d\n",
-                       cmsg->cmsg_type);
-               return -1;
-       }
-       return *(int*)CMSG_DATA(cmsg);
-}
-
-int rrm_fuse_mnt_umount(const char *progname, const char *mnt, int lazy)
-{
-       int res;
-       int status;
-       
-       res = umount2(mnt, lazy ? 2 : 0);
-       if (res == -1)
-         fprintf(stderr, "%s: failed to unmount %s: %s\n",
-                 progname, mnt, strerror(errno));
-       return res;
-
-}
-
-static int rrm_try_open(const char *dev, char **devp, int silent)
-{
-       int fd = open(dev, O_RDWR);
-       if (fd != -1) {
-               *devp = strdup(dev);
-               if (*devp == NULL) {
-                 fprintf(stderr, "failed to allocate memory\n" );
-                               
-                       close(fd);
-                       fd = -1;
-               }
-       } else if (errno == ENODEV ||
-                  errno == ENOENT)/* check for ENOENT too, for the udev case */
-               return -2;
-       else if (!silent) {
-               fprintf(stderr, "failed to open %s: %s\n", dev,
-                       strerror(errno));
-       }
-       return fd;
-}
-
-static int rrm_try_open_fuse_device(char **devp)
-{
-       int fd;
-       int err;
-
-       //drop_privs();
-       fd = rrm_try_open(FUSE_DEV_NEW, devp, 0);
-       //restore_privs();
-       if (fd >= 0)
-               return fd;
-
-       err = fd;
-       fd = rrm_try_open(FUSE_DEV_OLD, devp, 1);
-       if (fd >= 0)
-               return fd;
-
-       return err;
-}
-
-int rrm_open_fuse_device(char **devp)
-{
-       int fd = rrm_try_open_fuse_device(devp);
-       if (fd >= -1)
-               return fd;
-
-       fprintf(stderr,
-               "fuse device not found, try 'modprobe fuse' first\n");
-
-       return -1;
-}