148 files changed, 141286 insertions, 0 deletions
diff --git a/libfuse-lite/fuse_kern_chan.c b/libfuse-lite/fuse_kern_chan.c
new file mode 100755
index 0000000..0afec4b
--- a/dev/null
+++ b/libfuse-lite/fuse_kern_chan.c
@@ -0,0 +1,96 @@
+/*
+    FUSE: Filesystem in Userspace
+    Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
+
+    This program can be distributed under the terms of the GNU LGPLv2.
+    See the file COPYING.LIB
+*/
+
+#include "config.h"
+#include "fuse_lowlevel.h"
+#include "fuse_kernel.h"
+#include "fuse_i.h"
+
+#include <stdio.h>
+#include <errno.h>
+#include <unistd.h>
+#include <assert.h>
+
+static int fuse_kern_chan_receive(struct fuse_chan **chp, char *buf,
+                                  size_t size)
+{
+    struct fuse_chan *ch = *chp;
+    int err;
+    ssize_t res;
+    struct fuse_session *se = fuse_chan_session(ch);
+    assert(se != NULL);
+
+ restart:
+    res = read(fuse_chan_fd(ch), buf, size);
+    err = errno;
+
+    if (fuse_session_exited(se))
+        return 0;
+    if (res == -1) {
+        /* ENOENT means the operation was interrupted, it's safe
+           to restart */
+        if (err == ENOENT)
+            goto restart;
+
+        if (err == ENODEV) {
+            fuse_session_exit(se);
+            return 0;
+        }
+        /* Errors occuring during normal operation: EINTR (read
+           interrupted), EAGAIN (nonblocking I/O), ENODEV (filesystem
+           umounted) */
+        if (err != EINTR && err != EAGAIN)
+            perror("fuse: reading device");
+        return -err;
+    }
+    if ((size_t) res < sizeof(struct fuse_in_header)) {
+        fprintf(stderr, "short read on fuse device\n");
+        return -EIO;
+    }
+    return res;
+}
+
+static int fuse_kern_chan_send(struct fuse_chan *ch, const struct iovec iov[],
+                               size_t count)
+{
+    if (iov) {
+        ssize_t res = writev(fuse_chan_fd(ch), iov, count);
+        int err = errno;
+
+        if (res == -1) {
+            struct fuse_session *se = fuse_chan_session(ch);
+
+            assert(se != NULL);
+
+            /* ENOENT means the operation was interrupted */
+            if (!fuse_session_exited(se) && err != ENOENT)
+                perror("fuse: writing device");
+            return -err;
+        }
+    }
+    return 0;
+}
+
+static void fuse_kern_chan_destroy(struct fuse_chan *ch)
+{
+    close(fuse_chan_fd(ch));
+}
+
+#define MIN_BUFSIZE 0x101000
+
+struct fuse_chan *fuse_kern_chan_new(int fd)
+{
+    struct fuse_chan_ops op = {
+        .receive = fuse_kern_chan_receive,
+        .send = fuse_kern_chan_send,
+        .destroy = fuse_kern_chan_destroy,
+    };
+    size_t bufsize = getpagesize() + 0x1000;
+    bufsize = bufsize < MIN_BUFSIZE ? MIN_BUFSIZE : bufsize;
+    return fuse_chan_new(&op, fd, bufsize, NULL);
+}