Factor out code for locating the temporary directory.

This is just code movement.

For stable-1.4 branch, cherry picked from
commit a2d4a8bf073c3551d174bd6c406e0cf3d27fb560
and backported.

diff --git a/src/guestfs-internal.h b/src/guestfs-internal.h
index a8d1a34..9d76edb 100644 (file)
--- a/src/guestfs-internal.h
+++ b/src/guestfs-internal.h
@@ -144,6 +144,7 @@ extern void *guestfs_safe_realloc (guestfs_h *g, void *ptr, int nbytes);
 extern char *guestfs_safe_strdup (guestfs_h *g, const char *str);
 extern char *guestfs_safe_strndup (guestfs_h *g, const char *str, size_t n);
 extern void *guestfs_safe_memdup (guestfs_h *g, void *ptr, size_t size);
+extern const char *guestfs___tmpdir (void);
 extern int guestfs___set_busy (guestfs_h *g);
 extern int guestfs___end_busy (guestfs_h *g);
 extern int guestfs___send (guestfs_h *g, int proc_nr, xdrproc_t xdrp, char *args);

diff --git a/src/launch.c b/src/launch.c
index 0d7a3f3..4a479bc 100644 (file)
--- a/src/launch.c
+++ b/src/launch.c
@@ -266,8 +266,6 @@ static const char *initrd_name = "initramfs." REPO "." host_cpu ".img";
 int
 guestfs__launch (guestfs_h *g)
 {
-  const char *tmpdir;
-  char dir_template[PATH_MAX];
   int r, pmore;
   size_t len;
   int wfd[2], rfd[2];
@@ -293,16 +291,11 @@ guestfs__launch (guestfs_h *g)
   gettimeofday (&g->launch_t, NULL);
 
   /* Make the temporary directory. */
-#ifdef P_tmpdir
-  tmpdir = P_tmpdir;
-#else
-  tmpdir = "/tmp";
-#endif
-
-  tmpdir = getenv ("TMPDIR") ? : tmpdir;
-  snprintf (dir_template, sizeof dir_template, "%s/libguestfsXXXXXX", tmpdir);
-
   if (!g->tmpdir) {
+    const char *tmpdir = guestfs___tmpdir ();
+    char dir_template[strlen (tmpdir) + 32];
+    sprintf (dir_template, "%s/libguestfsXXXXXX", tmpdir);
+
     g->tmpdir = safe_strdup (g, dir_template);
     if (mkdtemp (g->tmpdir) == NULL) {
       perrorf (g, _("%s: cannot create temporary directory"), dir_template);
@@ -877,6 +870,23 @@ guestfs__launch (guestfs_h *g)
   return -1;
 }
 
+const char *
+guestfs___tmpdir (void)
+{
+  const char *tmpdir;
+
+#ifdef P_tmpdir
+  tmpdir = P_tmpdir;
+#else
+  tmpdir = "/tmp";
+#endif
+
+  const char *t = getenv ("TMPDIR");
+  if (t) tmpdir = t;
+
+  return tmpdir;
+}
+
 /* This function is used to print the qemu command line before it gets
  * executed, when in verbose mode.
  */