Import Upstream version 2.72.4
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269
gio/tests/filter-cat.c
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269
gio/tests/filter-cat.c
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/* GIO - GLib Input, Output and Streaming Library
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*
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* Copyright (C) 2009 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General
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* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*
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* Author: Alexander Larsson <alexl@redhat.com>
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*/
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#include <config.h>
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#include <stdio.h>
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#include <locale.h>
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#include <errno.h>
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#include <glib.h>
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#include <gio/gio.h>
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#ifdef G_OS_UNIX
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#include <unistd.h>
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#endif
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#ifdef G_OS_WIN32
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#include <io.h>
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#ifndef STDOUT_FILENO
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#define STDOUT_FILENO 1
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#endif
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#endif
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static gchar **locations = NULL;
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static char *from_charset = NULL;
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static char *to_charset = NULL;
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static gboolean decompress = FALSE;
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static gboolean compress = FALSE;
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static gboolean gzip = FALSE;
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static gboolean fallback = FALSE;
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static GOptionEntry entries[] = {
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{"decompress", 0, 0, G_OPTION_ARG_NONE, &decompress, "decompress", NULL},
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{"compress", 0, 0, G_OPTION_ARG_NONE, &compress, "compress", NULL},
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{"gzip", 0, 0, G_OPTION_ARG_NONE, &gzip, "use gzip format", NULL},
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{"from-charset", 0, 0, G_OPTION_ARG_STRING, &from_charset, "from charset", NULL},
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{"to-charset", 0, 0, G_OPTION_ARG_STRING, &to_charset, "to charset", NULL},
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{"fallback", 0, 0, G_OPTION_ARG_NONE, &fallback, "use fallback", NULL},
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{G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_FILENAME_ARRAY, &locations, "locations", NULL},
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G_OPTION_ENTRY_NULL
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};
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static void
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decompressor_file_info_notify_cb (GZlibDecompressor *decompressor,
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GParamSpec *pspec,
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gpointer data)
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{
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GFileInfo *file_info;
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const gchar *filename;
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file_info = g_zlib_decompressor_get_file_info (decompressor);
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if (file_info == NULL)
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return;
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filename = g_file_info_get_name (file_info);
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if (filename)
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g_printerr ("Decompressor filename: %s\n", filename);
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}
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static void
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cat (GFile * file)
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{
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GInputStream *in;
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char buffer[1024 * 8 + 1];
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char *p;
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gssize res;
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gboolean close_res;
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GError *error;
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GConverter *conv;
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GCharsetConverter *cconv = NULL;
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error = NULL;
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in = (GInputStream *) g_file_read (file, NULL, &error);
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if (in == NULL)
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{
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/* Translators: the first %s is the program name, the second one */
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/* is the URI of the file, the third is the error message. */
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g_printerr ("%s: %s: error opening file: %s\n",
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g_get_prgname (), g_file_get_uri (file), error->message);
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g_error_free (error);
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return;
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}
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if (decompress)
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{
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GInputStream *old;
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conv = (GConverter *)g_zlib_decompressor_new (gzip?G_ZLIB_COMPRESSOR_FORMAT_GZIP:G_ZLIB_COMPRESSOR_FORMAT_ZLIB);
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old = in;
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in = (GInputStream *) g_converter_input_stream_new (in, conv);
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g_signal_connect (conv, "notify::file-info", G_CALLBACK (decompressor_file_info_notify_cb), NULL);
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g_object_unref (conv);
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g_object_unref (old);
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}
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if (from_charset && to_charset)
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{
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cconv = g_charset_converter_new (to_charset, from_charset, &error);
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conv = (GConverter *)cconv;
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if (conv)
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{
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GInputStream *old;
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g_charset_converter_set_use_fallback (cconv, fallback);
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old = in;
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in = (GInputStream *) g_converter_input_stream_new (in, conv);
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g_object_unref (conv);
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g_object_unref (old);
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}
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else
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{
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g_printerr ("%s: Can't convert between charsets: %s\n",
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g_get_prgname (), error->message);
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}
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}
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if (compress)
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{
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GInputStream *old;
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GFileInfo *in_file_info;
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in_file_info = g_file_query_info (file,
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G_FILE_ATTRIBUTE_STANDARD_NAME ","
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G_FILE_ATTRIBUTE_TIME_MODIFIED,
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G_FILE_QUERY_INFO_NONE,
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NULL,
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&error);
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if (in_file_info == NULL)
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{
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g_printerr ("%s: %s: error reading file info: %s\n",
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g_get_prgname (), g_file_get_uri (file), error->message);
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g_error_free (error);
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return;
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}
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conv = (GConverter *)g_zlib_compressor_new(gzip?G_ZLIB_COMPRESSOR_FORMAT_GZIP:G_ZLIB_COMPRESSOR_FORMAT_ZLIB, -1);
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g_zlib_compressor_set_file_info (G_ZLIB_COMPRESSOR (conv), in_file_info);
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old = in;
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in = (GInputStream *) g_converter_input_stream_new (in, conv);
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g_object_unref (conv);
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g_object_unref (old);
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g_object_unref (in_file_info);
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}
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while (1)
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{
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res =
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g_input_stream_read (in, buffer, sizeof (buffer) - 1, NULL, &error);
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if (res > 0)
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{
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gssize written;
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p = buffer;
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while (res > 0)
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{
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written = write (STDOUT_FILENO, p, res);
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if (written == -1 && errno != EINTR)
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{
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/* Translators: the first %s is the program name, the */
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/* second one is the URI of the file. */
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g_printerr ("%s: %s, error writing to stdout",
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g_get_prgname (), g_file_get_uri (file));
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goto out;
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}
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res -= written;
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p += written;
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}
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}
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else if (res < 0)
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{
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g_printerr ("%s: %s: error reading: %s\n",
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g_get_prgname (), g_file_get_uri (file),
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error->message);
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g_error_free (error);
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error = NULL;
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break;
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}
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else if (res == 0)
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break;
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}
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out:
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close_res = g_input_stream_close (in, NULL, &error);
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if (!close_res)
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{
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g_printerr ("%s: %s:error closing: %s\n",
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g_get_prgname (), g_file_get_uri (file), error->message);
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g_error_free (error);
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}
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if (cconv != NULL && fallback)
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{
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guint num = g_charset_converter_get_num_fallbacks (cconv);
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if (num > 0)
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g_printerr ("Number of fallback errors: %u\n", num);
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}
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}
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int
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main (int argc, char *argv[])
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{
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GError *error = NULL;
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GOptionContext *context = NULL;
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GFile *file;
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int i;
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context =
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g_option_context_new ("LOCATION... - concatenate LOCATIONS "
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"to standard output.");
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g_option_context_set_summary (context, "filter files");
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g_option_context_add_main_entries (context, entries, GETTEXT_PACKAGE);
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g_option_context_parse (context, &argc, &argv, &error);
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g_option_context_free (context);
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if (error != NULL)
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{
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g_printerr ("Error parsing commandline options: %s\n", error->message);
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g_printerr ("\n");
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g_printerr ("Try \"%s --help\" for more information.",
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g_get_prgname ());
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g_printerr ("\n");
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g_error_free(error);
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return 1;
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}
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if (!locations)
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{
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g_printerr ("%s: missing locations", g_get_prgname ());
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g_printerr ("\n");
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g_printerr ("Try \"%s --help\" for more information.",
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g_get_prgname ());
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g_printerr ("\n");
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return 1;
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}
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i = 0;
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do
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{
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file = g_file_new_for_commandline_arg (locations[i]);
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cat (file);
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g_object_unref (file);
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}
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while (locations[++i] != NULL);
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return 0;
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}
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