[Libguestfs] [PATCH v4 1/7] daemon: expose file upload logic
Allows other modules to use the same logic for uploading files.
Signed-off-by: Matteo Cafasso <noxdafox(a)gmail.com>
---
daemon/daemon.h | 3 +++
daemon/upload.c | 70 ++++++++++++++++++++++++++++++++-------------------------
2 files changed, 42 insertions(+), 31 deletions(-)
diff --git a/daemon/daemon.h b/daemon/daemon.h
index 793074dea..bc89f78dd 100644
--- a/daemon/daemon.h
+++ b/daemon/daemon.h
@@ -258,6 +258,9 @@ extern int64_t ntfs_minimum_size (const char *device);
extern int swap_set_uuid (const char *device, const char *uuid);
extern int swap_set_label (const char *device, const char *label);
+/*-- in upload.c --*/
+extern int upload_to_fd (int fd);
+
/* ordinary daemon functions use these to indicate errors
* NB: you don't need to prefix the string with the current command,
* it is added automatically by the client-side RPC stubs.
diff --git a/daemon/upload.c b/daemon/upload.c
index 655baf29d..144bb246c 100644
--- a/daemon/upload.c
+++ b/daemon/upload.c
@@ -54,60 +54,68 @@ write_cb (void *data_vp, const void *buf, size_t len)
return 0;
}
+int
+upload_to_fd (int fd)
+{
+ int ret = 0, err = 0;
+ struct write_cb_data data = { .fd = fd, .written = 0 };
+
+ ret = receive_file (write_cb, &data);
+ if (ret == -1) { /* write error */
+ err = errno;
+ ret = cancel_receive ();
+ errno = err;
+ reply_with_error ("write error");
+ close (fd);
+ return -1;
+ }
+ if (ret == -2) { /* cancellation from library */
+ /* This error is ignored by the library since it initiated the
+ * cancel. Nevertheless we must send an error reply here.
+ */
+ reply_with_error ("file upload cancelled");
+ close (fd);
+ return -1;
+ }
+
+ if (close (fd) == -1) {
+ reply_with_perror ("close");
+ return -1;
+ }
+
+ return 0;
+}
+
/* Has one FileIn parameter. */
static int
upload (const char *filename, int flags, int64_t offset)
{
- struct write_cb_data data = { .written = 0 };
- int err, r, is_dev;
+ int err, is_dev, fd;
is_dev = STRPREFIX (filename, "/dev/");
if (!is_dev) CHROOT_IN;
- data.fd = open (filename, flags, 0666);
+ fd = open (filename, flags, 0666);
if (!is_dev) CHROOT_OUT;
- if (data.fd == -1) {
+ if (fd == -1) {
err = errno;
- r = cancel_receive ();
+ cancel_receive ();
errno = err;
reply_with_perror ("%s", filename);
return -1;
}
if (offset) {
- if (lseek (data.fd, offset, SEEK_SET) == -1) {
+ if (lseek (fd, offset, SEEK_SET) == -1) {
err = errno;
- r = cancel_receive ();
+ cancel_receive ();
errno = err;
reply_with_perror ("lseek: %s", filename);
return -1;
}
}
- r = receive_file (write_cb, &data);
- if (r == -1) { /* write error */
- err = errno;
- r = cancel_receive ();
- errno = err;
- reply_with_error ("write error: %s", filename);
- close (data.fd);
- return -1;
- }
- if (r == -2) { /* cancellation from library */
- /* This error is ignored by the library since it initiated the
- * cancel. Nevertheless we must send an error reply here.
- */
- reply_with_error ("file upload cancelled");
- close (data.fd);
- return -1;
- }
-
- if (close (data.fd) == -1) {
- reply_with_perror ("close: %s", filename);
- return -1;
- }
-
- return 0;
+ return upload_to_fd (fd);
}
/* Has one FileIn parameter. */
--
2.11.0