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platform_system_core
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Partially implement SETATTR for sdcard/FUSE 

Handle truncate cases within SETATTR so that truncate() and ftruncate() call
will work.

Change-Id: I5a9862dcaa6ca7b5e9115cb5d3bfed88787fa7ac
Signed-off-by: Paul Eastham <eastham@google.com>
This commit is contained in:
Paul Eastham 2010-09-21 17:14:31 -07:00
parent d7482b2f4c
commit f43219e0b1
1 changed files with 20 additions and 2 deletions
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22
sdcard/sdcard.c
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@ -114,6 +114,12 @@ struct fuse {
#define PATH_BUFFER_SIZE 1024
/*
* Get the real-life absolute path to a node.
* node: start at this node
* buf: storage for returned string
* name: append this string to path if set
*/
char *node_get_path(struct node *node, char *buf, const char *name)
{
char *out = buf + PATH_BUFFER_SIZE - 1;
@ -439,15 +445,27 @@ void handle_fuse_request(struct fuse *fuse, struct fuse_in_header *hdr, void *da
case FUSE_SETATTR: { /* setattr_in -> attr_out */
struct fuse_setattr_in *req = data;
struct fuse_attr_out out;
char *path, buffer[PATH_BUFFER_SIZE];
int res = 0;
TRACE("SETATTR fh=%llx id=%llx valid=%x\n",
req->fh, hdr->nodeid, req->valid);
/* XXX */
/* XXX: incomplete implementation -- truncate only. chmod/chown
* should NEVER be implemented. */
path = node_get_path(node, buffer, 0);
if (req->valid & FATTR_SIZE)
res = truncate(path, req->size);
memset(&out, 0, sizeof(out));
node_get_attr(node, &out.attr);
out.attr_valid = 10;
fuse_reply(fuse, hdr->unique, &out, sizeof(out));
if (res)
fuse_status(fuse, hdr->unique, -errno);
else
fuse_reply(fuse, hdr->unique, &out, sizeof(out));
return;
}
// case FUSE_READLINK: