libguestfs/0026-lib-move-guestfs_int_create_socketname-from-launch.c.patch

From 986f5d8b1110b461d37d044c7a8052ed7ba27f87 Mon Sep 17 00:00:00 2001
From: Laszlo Ersek <lersek@redhat.com>
Date: Fri, 14 Jul 2023 15:22:11 +0200
Subject: [PATCH] lib: move guestfs_int_create_socketname() from "launch.c" to
 "tmpdirs.c"

Consider the following inverted call tree (effectively a dependency tree
-- callees are at the top and near the left margin):

  lazy_make_tmpdir()                  [lib/tmpdirs.c]
    guestfs_int_lazy_make_tmpdir()    [lib/tmpdirs.c]
      guestfs_int_make_temp_path()    [lib/tmpdirs.c]
    guestfs_int_lazy_make_sockdir()   [lib/tmpdirs.c]
      guestfs_int_create_socketname() [lib/launch.c]

lazy_make_tmpdir() is our common workhorse / helper function that
centralizes the mkdtemp() function call.

guestfs_int_lazy_make_tmpdir() and guestfs_int_lazy_make_sockdir() are the
next level functions, both calling lazy_make_tmpdir(), just feeding it
different dirname generator functions, and different "is_runtime_dir"
qualifications. These functions create temp dirs for various, more
specific, purposes (see the manual and "lib/guestfs-internal.h" for more
details).

On a yet higher level are guestfs_int_make_temp_path() and
guestfs_int_create_socketname() -- they serve for creating *entries* in
those specific temp directories.

The discrepancy here is that, although all the other functions live in
"lib/tmpdirs.c", guestfs_int_create_socketname() is defined in
"lib/launch.c". That makes for a confusing code reading; move the function
to "lib/tmpdirs.c", just below its sibling function
guestfs_int_make_temp_path().

While at it, correct the leading comment on
guestfs_int_create_socketname() -- the socket pathname is created in the
socket directory, not in the temporary directory.

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2184967
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Richard W.M. Jones <rjones@redhat.com>
Message-Id: <20230714132213.96616-6-lersek@redhat.com>
(cherry picked from commit 0b2ad40a098cbaf91d0d0a2df6e31bf8e3e08ace)
---
 lib/guestfs-internal.h |  2 +-
 lib/launch.c           | 26 --------------------------
 lib/tmpdirs.c          | 26 ++++++++++++++++++++++++++
 3 files changed, 27 insertions(+), 27 deletions(-)

diff --git a/lib/guestfs-internal.h b/lib/guestfs-internal.h
index c7ef3227..ebd68380 100644
--- a/lib/guestfs-internal.h
+++ b/lib/guestfs-internal.h
@@ -668,6 +668,7 @@ extern int guestfs_int_set_env_runtimedir (guestfs_h *g, const char *envname, co
 extern int guestfs_int_lazy_make_tmpdir (guestfs_h *g);
 extern int guestfs_int_lazy_make_sockdir (guestfs_h *g);
 extern char *guestfs_int_make_temp_path (guestfs_h *g, const char *name, const char *extension);
+extern int guestfs_int_create_socketname (guestfs_h *g, const char *filename, char (*sockname)[UNIX_PATH_MAX]);
 extern char *guestfs_int_lazy_make_supermin_appliance_dir (guestfs_h *g);
 extern void guestfs_int_remove_tmpdir (guestfs_h *g);
 extern void guestfs_int_remove_sockdir (guestfs_h *g);
@@ -700,7 +701,6 @@ extern int guestfs_int_get_uefi (guestfs_h *g, char *const *firmwares, const cha
 extern int64_t guestfs_int_timeval_diff (const struct timeval *x, const struct timeval *y);
 extern void guestfs_int_launch_send_progress (guestfs_h *g, int perdozen);
 extern void guestfs_int_unblock_sigterm (void);
-extern int guestfs_int_create_socketname (guestfs_h *g, const char *filename, char (*sockname)[UNIX_PATH_MAX]);
 extern void guestfs_int_register_backend (const char *name, const struct backend_ops *);
 extern int guestfs_int_set_backend (guestfs_h *g, const char *method);
 
diff --git a/lib/launch.c b/lib/launch.c
index 6e08b120..bd0526c9 100644
--- a/lib/launch.c
+++ b/lib/launch.c
@@ -309,32 +309,6 @@ guestfs_impl_config (guestfs_h *g,
   return 0;
 }
 
-/**
- * Create the path for a socket with the selected filename in the
- * tmpdir.
- */
-int
-guestfs_int_create_socketname (guestfs_h *g, const char *filename,
-                               char (*sockpath)[UNIX_PATH_MAX])
-{
-  int r;
-
-  if (guestfs_int_lazy_make_sockdir (g) == -1)
-    return -1;
-
-  r = snprintf (*sockpath, UNIX_PATH_MAX, "%s/%s", g->sockdir, filename);
-  if (r >= UNIX_PATH_MAX) {
-    error (g, _("socket path too long: %s/%s"), g->sockdir, filename);
-    return -1;
-  }
-  if (r < 0) {
-    perrorf (g, _("%s"), g->sockdir);
-    return -1;
-  }
-
-  return 0;
-}
-
 /**
  * When the library is loaded, each backend calls this function to
  * register itself in a global list.
diff --git a/lib/tmpdirs.c b/lib/tmpdirs.c
index b8e19de2..24adf98d 100644
--- a/lib/tmpdirs.c
+++ b/lib/tmpdirs.c
@@ -253,6 +253,32 @@ guestfs_int_make_temp_path (guestfs_h *g,
                         extension ? extension : "");
 }
 
+/**
+ * Create the path for a socket with the selected filename in the
+ * sockdir.
+ */
+int
+guestfs_int_create_socketname (guestfs_h *g, const char *filename,
+                               char (*sockpath)[UNIX_PATH_MAX])
+{
+  int r;
+
+  if (guestfs_int_lazy_make_sockdir (g) == -1)
+    return -1;
+
+  r = snprintf (*sockpath, UNIX_PATH_MAX, "%s/%s", g->sockdir, filename);
+  if (r >= UNIX_PATH_MAX) {
+    error (g, _("socket path too long: %s/%s"), g->sockdir, filename);
+    return -1;
+  }
+  if (r < 0) {
+    perrorf (g, _("%s"), g->sockdir);
+    return -1;
+  }
+
+  return 0;
+}
+
 /**
  * Create the supermin appliance directory under cachedir, if it does
  * not exist.