X-Git-Url: http://git.annexia.org/?p=libguestfs.git;a=blobdiff_plain;f=daemon%2Ftar.c;h=26a0d302136cad8a3d896e8a13270ef3c2a77f53;hp=e1ff9b6da0becab10784528de309445e783b5b19;hb=0c1e77219ea264a51b62e648003bfbea51db8ffb;hpb=0dd6c8c8442d4ff588f6dac2efab24d3409b0dec

diff --git a/daemon/tar.c b/daemon/tar.c
index e1ff9b6..26a0d30 100644
--- a/daemon/tar.c
+++ b/daemon/tar.c
@@ -28,26 +28,20 @@
 #include "actions.h"
 
 static int
-fwrite_cb (void *fp_ptr, const void *buf, int len)
+write_cb (void *fd_ptr, const void *buf, size_t len)
 {
-  FILE *fp = *(FILE **)fp_ptr;
-  return fwrite (buf, len, 1, fp) == 1 ? 0 : -1;
+  int fd = *(int *)fd_ptr;
+  return xwrite (fd, buf, len);
 }
 
 /* Has one FileIn parameter. */
 int
-do_tar_in (char *dir)
+do_tar_in (const char *dir)
 {
   int err, r;
   FILE *fp;
   char *cmd;
 
-  if (!root_mounted || dir[0] != '/') {
-    cancel_receive ();
-    reply_with_error ("tar-in: root must be mounted and path must be absolute");
-    return -1;
-  }
-
   /* "tar -C /sysroot%s -xf -" but we have to quote the dir. */
   if (asprintf_nowarn (&cmd, "tar -C %R -xf -", dir) == -1) {
     err = errno;
@@ -71,12 +65,15 @@ do_tar_in (char *dir)
   }
   free (cmd);
 
-  r = receive_file (fwrite_cb, &fp);
+  /* The semantics of fwrite are too undefined, so write to the
+   * file descriptor directly instead.
+   */
+  int fd = fileno (fp);
+
+  r = receive_file (write_cb, &fd);
   if (r == -1) {		/* write error */
-    err = errno;
     cancel_receive ();
-    errno = err;
-    reply_with_perror ("write: %s", dir);
+    reply_with_error ("write error on directory: %s", dir);
     pclose (fp);
     return -1;
   }
@@ -87,10 +84,9 @@ do_tar_in (char *dir)
   }
 
   if (pclose (fp) != 0) {
-    err = errno;
-    cancel_receive ();
-    errno = err;
-    reply_with_perror ("pclose: %s", dir);
+    if (r == -1)                /* if r == 0, file transfer ended already */
+      cancel_receive ();
+    reply_with_error ("tar subcommand failed on directory: %s", dir);
     return -1;
   }
 
@@ -99,16 +95,13 @@ do_tar_in (char *dir)
 
 /* Has one FileOut parameter. */
 int
-do_tar_out (char *dir)
+do_tar_out (const char *dir)
 {
   int r;
   FILE *fp;
   char *cmd;
   char buf[GUESTFS_MAX_CHUNK_SIZE];
 
-  NEED_ROOT (-1);
-  ABS_PATH (dir, return -1);
-
   /* "tar -C /sysroot%s -cf - ." but we have to quote the dir. */
   if (asprintf_nowarn (&cmd, "tar -C %R -cf - .", dir) == -1) {
     reply_with_perror ("asprintf");
@@ -152,26 +145,22 @@ do_tar_out (char *dir)
     return -1;
   }
 
-  send_file_end (0);		/* Normal end of file. */
+  if (send_file_end (0))	/* Normal end of file. */
+    return -1;
+
   return 0;
 }
 
 /* Has one FileIn parameter. */
-int
-do_tgz_in (char *dir)
+static int
+do_tXz_in (const char *dir, char filter)
 {
   int err, r;
   FILE *fp;
   char *cmd;
 
-  if (!root_mounted || dir[0] != '/') {
-    cancel_receive ();
-    reply_with_error ("tar-in: root must be mounted and path must be absolute");
-    return -1;
-  }
-
   /* "tar -C /sysroot%s -zxf -" but we have to quote the dir. */
-  if (asprintf_nowarn (&cmd, "tar -C %R -zxf -", dir) == -1) {
+  if (asprintf_nowarn (&cmd, "tar -C %R -%cxf -", dir, filter) == -1) {
     err = errno;
     cancel_receive ();
     errno = err;
@@ -193,12 +182,12 @@ do_tgz_in (char *dir)
   }
   free (cmd);
 
-  r = receive_file (fwrite_cb, &fp);
+  int fd = fileno (fp);
+
+  r = receive_file (write_cb, &fd);
   if (r == -1) {		/* write error */
-    err = errno;
     cancel_receive ();
-    errno = err;
-    reply_with_perror ("write: %s", dir);
+    reply_with_error ("write error on directory: %s", dir);
     pclose (fp);
     return -1;
   }
@@ -209,30 +198,40 @@ do_tgz_in (char *dir)
   }
 
   if (pclose (fp) != 0) {
-    err = errno;
-    cancel_receive ();
-    errno = err;
-    reply_with_perror ("pclose: %s", dir);
+    if (r == -1)                /* if r == 0, file transfer ended already */
+      cancel_receive ();
+    reply_with_error ("tar subcommand failed on directory: %s", dir);
     return -1;
   }
 
   return 0;
 }
 
-/* Has one FileOut parameter. */
+/* Has one FileIn parameter. */
+int
+do_tgz_in (const char *dir)
+{
+  return do_tXz_in (dir, 'z');
+}
+
+/* Has one FileIn parameter. */
 int
-do_tgz_out (char *dir)
+do_txz_in (const char *dir)
+{
+  return do_tXz_in (dir, 'J');
+}
+
+/* Has one FileOut parameter. */
+static int
+do_tXz_out (const char *dir, char filter)
 {
   int r;
   FILE *fp;
   char *cmd;
   char buf[GUESTFS_MAX_CHUNK_SIZE];
 
-  NEED_ROOT (-1);
-  ABS_PATH (dir, return -1);
-
   /* "tar -C /sysroot%s -zcf - ." but we have to quote the dir. */
-  if (asprintf_nowarn (&cmd, "tar -C %R -zcf - .", dir) == -1) {
+  if (asprintf_nowarn (&cmd, "tar -C %R -%ccf - .", dir, filter) == -1) {
     reply_with_perror ("asprintf");
     return -1;
   }
@@ -274,6 +273,22 @@ do_tgz_out (char *dir)
     return -1;
   }
 
-  send_file_end (0);		/* Normal end of file. */
+  if (send_file_end (0))	/* Normal end of file. */
+    return -1;
+
   return 0;
 }
+
+/* Has one FileOut parameter. */
+int
+do_tgz_out (const char *dir)
+{
+  return do_tXz_out (dir, 'z');
+}
+
+/* Has one FileOut parameter. */
+int
+do_txz_out (const char *dir)
+{
+  return do_tXz_out (dir, 'J');
+}