Import Upstream version 2.72.4

gio/gio-tool-cat.c

@@ -0,0 +1,178 @@
+/*
+ * Copyright 2015 Red Hat, 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/>.
+ *
+ * Author: Matthias Clasen <mclasen@redhat.com>
+ */
+
+#include "config.h"
+
+#include <gio/gio.h>
+#include <gi18n.h>
+#include <errno.h>
+
+#ifdef G_OS_WIN32
+#include <io.h>
+#endif
+
+#ifndef STDOUT_FILENO
+#define STDOUT_FILENO 1
+#endif
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#include "gio-tool.h"
+
+
+static const GOptionEntry entries[] = {
+  G_OPTION_ENTRY_NULL
+};
+
+/* 256k minus malloc overhead */
+#define STREAM_BUFFER_SIZE (1024*256 - 2*sizeof(gpointer))
+
+static gboolean
+cat (GFile *file)
+{
+  GInputStream *in;
+  char *buffer;
+  char *p;
+  gssize res;
+  gboolean close_res;
+  GError *error;
+  gboolean success;
+
+  error = NULL;
+  in = (GInputStream *) g_file_read (file, NULL, &error);
+  if (in == NULL)
+    {
+      print_file_error (file, error->message);
+      g_error_free (error);
+      return FALSE;
+    }
+
+  buffer = g_malloc (STREAM_BUFFER_SIZE);
+  success = TRUE;
+  while (1)
+    {
+      res = g_input_stream_read (in, buffer, STREAM_BUFFER_SIZE, NULL, &error);
+      if (res > 0)
+        {
+          gssize written;
+
+          p = buffer;
+          while (res > 0)
+            {
+              int errsv;
+
+              written = write (STDOUT_FILENO, p, res);
+              errsv = errno;
+
+              if (written == -1 && errsv != EINTR)
+                {
+                  print_error ("%s", _("Error writing to stdout"));
+                  success = FALSE;
+                  goto out;
+                }
+              res -= written;
+              p += written;
+            }
+        }
+      else if (res < 0)
+        {
+          print_file_error (file, error->message);
+          g_error_free (error);
+          error = NULL;
+          success = FALSE;
+          break;
+        }
+      else if (res == 0)
+        break;
+    }
+
+ out:
+ close_res = g_input_stream_close (in, NULL, &error);
+  if (!close_res)
+    {
+      print_file_error (file, error->message);
+      g_error_free (error);
+      success = FALSE;
+    }
+
+  g_free (buffer);
+
+  return success;
+}
+
+int
+handle_cat (int argc, char *argv[], gboolean do_help)
+{
+  GOptionContext *context;
+  gchar *param;
+  GError *error = NULL;
+  int i;
+  gboolean res;
+  GFile *file;
+
+  g_set_prgname ("gio cat");
+  /* Translators: commandline placeholder */
+  param = g_strdup_printf ("%s…", _("LOCATION"));
+  context = g_option_context_new (param);
+  g_free (param);
+  g_option_context_set_help_enabled (context, FALSE);
+  g_option_context_set_summary (context,
+      _("Concatenate files and print to standard output."));
+  g_option_context_set_description (context,
+      _("gio cat works just like the traditional cat utility, but using GIO\n"
+        "locations instead of local files: for example, you can use something\n"
+        "like smb://server/resource/file.txt as location."));
+  g_option_context_add_main_entries (context, entries, GETTEXT_PACKAGE);
+
+  if (do_help)
+    {
+      show_help (context, NULL);
+      g_option_context_free (context);
+      return 0;
+    }
+
+  if (!g_option_context_parse (context, &argc, &argv, &error))
+    {
+      show_help (context, error->message);
+      g_error_free (error);
+      g_option_context_free (context);
+      return 1;
+    }
+
+  if (argc < 2)
+    {
+      show_help (context, _("No locations given"));
+      g_option_context_free (context);
+      return 1;
+    }
+
+  g_option_context_free (context);
+
+  res = TRUE;
+  for (i = 1; i < argc; i++)
+    {
+      file = g_file_new_for_commandline_arg (argv[i]);
+      res &= cat (file);
+      g_object_unref (file);
+    }
+
+  return res ? 0 : 2;
+}