build: Move sources into src/ again

This is necessary if we want to build when srcdir == builddir,
otherwise we blow up because "ostree" is a source directory and a
binary.

1 files changed, 273 insertions, 0 deletions

diff --git a/src/libotutil/ot-unix-utils.c b/src/libotutil/ot-unix-utils.c
new file mode 100644
index 00000000..24fcf8b3
--- /dev/null
+++ b/src/libotutil/ot-unix-utils.c
@@ -0,0 +1,273 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-
+ *
+ * Copyright (C) 2011 Colin Walters <walters@verbum.org>
+ *
+ * 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 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, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ *
+ * Author: Colin Walters <walters@verbum.org>
+ */
+
+#include "config.h"
+
+#include "ot-unix-utils.h"
+
+#include <gio/gio.h>
+#include <gio/gunixoutputstream.h>
+
+#include <string.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <dirent.h>
+
+gboolean
+ot_util_spawn_pager (GOutputStream  **out_stream,
+                     GError         **error)
+{
+  const char *pager;
+  char *argv[2];
+  int stdin_fd;
+  pid_t pid;
+  gboolean ret = FALSE;
+  GOutputStream *ret_stream = NULL;
+
+  if (!isatty (1))
+    {
+      ret_stream = (GOutputStream*)g_unix_output_stream_new (1, TRUE);
+    }
+  else
+    {
+      pager = g_getenv ("GIT_PAGER");
+      if (pager == NULL)
+        pager = "less";
+      
+      argv[0] = (char*)pager;
+      argv[1] = NULL;
+      
+      if (!g_spawn_async_with_pipes (NULL, argv, NULL, G_SPAWN_SEARCH_PATH | G_SPAWN_DO_NOT_REAP_CHILD,
+                                     NULL, NULL, &pid, &stdin_fd, NULL, NULL, error))
+        {
+          g_prefix_error (error, "%s", "Failed to spawn pager: ");
+          goto out;
+        }
+      
+      ret_stream = (GOutputStream*)g_unix_output_stream_new (stdin_fd, TRUE);
+    }
+
+  *out_stream = ret_stream;
+  ret_stream = NULL;
+  ret = TRUE;
+ out:
+  g_clear_object (&ret_stream);
+  return ret;
+}
+
+static int
+compare_filenames_by_component_length (const char *a,
+                                       const char *b)
+{
+  char *a_slash, *b_slash;
+
+  a_slash = strchr (a, '/');
+  b_slash = strchr (b, '/');
+  while (a_slash && b_slash)
+    {
+      a = a_slash + 1;
+      b = b_slash + 1;
+      a_slash = strchr (a, '/');
+      b_slash = strchr (b, '/');
+    }
+  if (a_slash)
+    return -1;
+  else if (b_slash)
+    return 1;
+  else
+    return 0;
+}
+
+GPtrArray *
+ot_util_sort_filenames_by_component_length (GPtrArray *files)
+{
+  GPtrArray *array = g_ptr_array_sized_new (files->len);
+  memcpy (array->pdata, files->pdata, sizeof (gpointer) * files->len);
+  g_ptr_array_sort (array, (GCompareFunc) compare_filenames_by_component_length);
+  return array;
+}
+
+int
+ot_util_count_filename_components (const char *path)
+{
+  int i = 0;
+
+  while (path)
+    {
+      i++;
+      path = strchr (path, '/');
+      if (path)
+        path++;
+    }
+  return i;
+}
+
+gboolean
+ot_util_filename_has_dotdot (const char *path)
+{
+  char *p;
+  char last;
+
+  if (strcmp (path, "..") == 0)
+    return TRUE;
+  if (g_str_has_prefix (path, "../"))
+    return TRUE;
+  p = strstr (path, "/..");
+  if (!p)
+    return FALSE;
+  last = *(p + 1);
+  return last == '\0' || last == '/';
+}
+
+GPtrArray *
+ot_util_path_split (const char *path)
+{
+  GPtrArray *ret = NULL;
+  const char *p;
+  const char *slash;
+  int i;
+
+  g_return_val_if_fail (path[0] != '/', NULL);
+
+  ret = g_ptr_array_new ();
+  g_ptr_array_set_free_func (ret, g_free);
+
+  p = path;
+  do {
+    slash = strchr (p, '/');
+    if (!slash)
+      {
+        g_ptr_array_add (ret, g_strdup (p));
+        p = NULL;
+      }
+    else
+      {
+        g_ptr_array_add (ret, g_strndup (p, slash - p));
+        p = slash + 1;
+      }
+  } while (p && *p);
+
+  /* Canonicalize by removing duplicate '.' */
+  for (i = ret->len-1; i >= 0; i--)
+    {
+      if (strcmp (ret->pdata[i], ".") == 0)
+        g_ptr_array_remove_index (ret, i);
+    }
+
+  return ret;
+}
+
+char *
+ot_util_path_join_n (const char *base, GPtrArray *components, int n)
+{
+  int max = MIN(n+1, components->len);
+  GPtrArray *subcomponents;
+  char *path;
+  int i;
+
+  subcomponents = g_ptr_array_new ();
+
+  if (base != NULL)
+    g_ptr_array_add (subcomponents, (char*)base);
+
+  for (i = 0; i < max; i++)
+    {
+      g_ptr_array_add (subcomponents, components->pdata[i]);
+    }
+  g_ptr_array_add (subcomponents, NULL);
+  
+  path = g_build_filenamev ((char**)subcomponents->pdata);
+  g_ptr_array_free (subcomponents, TRUE);
+  
+  return path;
+}
+
+void
+ot_util_set_error_from_errno (GError **error,
+                              gint     saved_errno)
+{
+  g_set_error_literal (error,
+                       G_IO_ERROR,
+                       0,
+                       g_strerror (saved_errno));
+  errno = saved_errno;
+}
+
+int
+ot_util_open_file_read (const char *path, GError **error)
+{
+  char *dirname = NULL;
+  char *basename = NULL;
+  DIR *dir = NULL;
+  int fd = -1;
+
+  dirname = g_path_get_dirname (path);
+  basename = g_path_get_basename (path);
+  dir = opendir (dirname);
+  if (dir == NULL)
+    {
+      ot_util_set_error_from_errno (error, errno);
+      goto out;
+    }
+
+  fd = ot_util_open_file_read_at (dirfd (dir), basename, error);
+
+ out:
+  g_free (basename);
+  g_free (dirname);
+  if (dir != NULL)
+    closedir (dir);
+  return fd;
+}
+
+int
+ot_util_open_file_read_at (int dirfd, const char *name, GError **error)
+{
+  int fd;
+  int flags = O_RDONLY;
+  
+#ifdef O_CLOEXEC
+  flags |= O_CLOEXEC;
+#endif
+#ifdef O_NOATIME
+  flags |= O_NOATIME;
+#endif
+  fd = openat (dirfd, name, flags);
+  if (fd < 0)
+    ot_util_set_error_from_errno (error, errno);
+  return fd;
+}
+
+void
+ot_util_fatal_literal (const char *msg)
+{
+  g_printerr ("%s\n", msg);
+  exit (1);
+}
+
+void
+ot_util_fatal_gerror (GError *error)
+{
+  g_assert (error != NULL);
+  ot_util_fatal_literal (error->message);
+}