[glib: 3/4] gspawn: Factor out error code conversion function

[Philip Withnall <pwithnall src gnome org>]

commit d157102a5430867b0f482ea7e6177f2f2fea0272
Author: Philip Withnall <withnall endlessm com>
Date:   Tue Jun 12 16:00:13 2018 +0100

    gspawn: Factor out error code conversion function
    
    This will be used in gspawn-win32.c too in an upcoming commit.
    
    https://gitlab.gnome.org/GNOME/glib/issues/303
    
    Signed-off-by: Philip Withnall <withnall endlessm com>

 glib/Makefile.am      |   1 +
 glib/gspawn-private.h | 115 ++++++++++++++++++++++++++++++++++++++++++++++++++
 glib/gspawn.c         | 110 +----------------------------------------------
 3 files changed, 118 insertions(+), 108 deletions(-)
---
diff --git a/glib/Makefile.am b/glib/Makefile.am
index 4d04e09da..7252a67d0 100644
--- a/glib/Makefile.am
+++ b/glib/Makefile.am
@@ -220,6 +220,7 @@ EXTRA_libglib_2_0_la_SOURCES = \
        giounix.c       \
        giowin32.c      \
        gspawn.c        \
+       gspawn-private.h \
        gspawn-win32.c  \
        gwin32.c
 
diff --git a/glib/gspawn-private.h b/glib/gspawn-private.h
new file mode 100644
index 000000000..16f816c89
--- /dev/null
+++ b/glib/gspawn-private.h
@@ -0,0 +1,115 @@
+/* gspawn.c - Process launching
+ *
+ *  Copyright 2000 Red Hat, Inc.
+ *  g_execvpe implementation based on GNU libc execvp:
+ *   Copyright 1991, 92, 95, 96, 97, 98, 99 Free Software Foundation, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <errno.h>
+
+#include "gspawn.h"
+
+static inline gint
+_g_spawn_exec_err_to_g_error (gint en)
+{
+  switch (en)
+    {
+#ifdef EACCES
+    case EACCES:
+      return G_SPAWN_ERROR_ACCES;
+#endif
+
+#ifdef EPERM
+    case EPERM:
+      return G_SPAWN_ERROR_PERM;
+#endif
+
+#ifdef E2BIG
+    case E2BIG:
+      return G_SPAWN_ERROR_TOO_BIG;
+#endif
+
+#ifdef ENOEXEC
+    case ENOEXEC:
+      return G_SPAWN_ERROR_NOEXEC;
+#endif
+
+#ifdef ENAMETOOLONG
+    case ENAMETOOLONG:
+      return G_SPAWN_ERROR_NAMETOOLONG;
+#endif
+
+#ifdef ENOENT
+    case ENOENT:
+      return G_SPAWN_ERROR_NOENT;
+#endif
+
+#ifdef ENOMEM
+    case ENOMEM:
+      return G_SPAWN_ERROR_NOMEM;
+#endif
+
+#ifdef ENOTDIR
+    case ENOTDIR:
+      return G_SPAWN_ERROR_NOTDIR;
+#endif
+
+#ifdef ELOOP
+    case ELOOP:
+      return G_SPAWN_ERROR_LOOP;
+#endif
+
+#ifdef ETXTBUSY
+    case ETXTBUSY:
+      return G_SPAWN_ERROR_TXTBUSY;
+#endif
+
+#ifdef EIO
+    case EIO:
+      return G_SPAWN_ERROR_IO;
+#endif
+
+#ifdef ENFILE
+    case ENFILE:
+      return G_SPAWN_ERROR_NFILE;
+#endif
+
+#ifdef EMFILE
+    case EMFILE:
+      return G_SPAWN_ERROR_MFILE;
+#endif
+
+#ifdef EINVAL
+    case EINVAL:
+      return G_SPAWN_ERROR_INVAL;
+#endif
+
+#ifdef EISDIR
+    case EISDIR:
+      return G_SPAWN_ERROR_ISDIR;
+#endif
+
+#ifdef ELIBBAD
+    case ELIBBAD:
+      return G_SPAWN_ERROR_LIBBAD;
+#endif
+
+    default:
+      return G_SPAWN_ERROR_FAILED;
+    }
+}
diff --git a/glib/gspawn.c b/glib/gspawn.c
index 89824d176..5e90d4c5b 100644
--- a/glib/gspawn.c
+++ b/glib/gspawn.c
@@ -40,6 +40,7 @@
 #endif /* HAVE_SYS_RESOURCE_H */
 
 #include "gspawn.h"
+#include "gspawn-private.h"
 #include "gthread.h"
 #include "glib/gstdio.h"
 
@@ -925,113 +926,6 @@ g_spawn_check_exit_status (gint      exit_status,
   return ret;
 }
 
-static gint
-exec_err_to_g_error (gint en)
-{
-  switch (en)
-    {
-#ifdef EACCES
-    case EACCES:
-      return G_SPAWN_ERROR_ACCES;
-      break;
-#endif
-
-#ifdef EPERM
-    case EPERM:
-      return G_SPAWN_ERROR_PERM;
-      break;
-#endif
-
-#ifdef E2BIG
-    case E2BIG:
-      return G_SPAWN_ERROR_TOO_BIG;
-      break;
-#endif
-
-#ifdef ENOEXEC
-    case ENOEXEC:
-      return G_SPAWN_ERROR_NOEXEC;
-      break;
-#endif
-
-#ifdef ENAMETOOLONG
-    case ENAMETOOLONG:
-      return G_SPAWN_ERROR_NAMETOOLONG;
-      break;
-#endif
-
-#ifdef ENOENT
-    case ENOENT:
-      return G_SPAWN_ERROR_NOENT;
-      break;
-#endif
-
-#ifdef ENOMEM
-    case ENOMEM:
-      return G_SPAWN_ERROR_NOMEM;
-      break;
-#endif
-
-#ifdef ENOTDIR
-    case ENOTDIR:
-      return G_SPAWN_ERROR_NOTDIR;
-      break;
-#endif
-
-#ifdef ELOOP
-    case ELOOP:
-      return G_SPAWN_ERROR_LOOP;
-      break;
-#endif
-      
-#ifdef ETXTBUSY
-    case ETXTBUSY:
-      return G_SPAWN_ERROR_TXTBUSY;
-      break;
-#endif
-
-#ifdef EIO
-    case EIO:
-      return G_SPAWN_ERROR_IO;
-      break;
-#endif
-
-#ifdef ENFILE
-    case ENFILE:
-      return G_SPAWN_ERROR_NFILE;
-      break;
-#endif
-
-#ifdef EMFILE
-    case EMFILE:
-      return G_SPAWN_ERROR_MFILE;
-      break;
-#endif
-
-#ifdef EINVAL
-    case EINVAL:
-      return G_SPAWN_ERROR_INVAL;
-      break;
-#endif
-
-#ifdef EISDIR
-    case EISDIR:
-      return G_SPAWN_ERROR_ISDIR;
-      break;
-#endif
-
-#ifdef ELIBBAD
-    case ELIBBAD:
-      return G_SPAWN_ERROR_LIBBAD;
-      break;
-#endif
-      
-    default:
-      return G_SPAWN_ERROR_FAILED;
-      break;
-    }
-}
-
 static gssize
 write_all (gint fd, gconstpointer vbuf, gsize to_write)
 {
@@ -1549,7 +1443,7 @@ fork_exec_with_pipes (gboolean              intermediate_child,
             case CHILD_EXEC_FAILED:
               g_set_error (error,
                            G_SPAWN_ERROR,
-                           exec_err_to_g_error (buf[1]),
+                           _g_spawn_exec_err_to_g_error (buf[1]),
                            _("Failed to execute child process “%s” (%s)"),
                            argv[0],
                            g_strerror (buf[1]));