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/*
* Copyright 2015 Red Hat, Inc.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*
* 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>
#ifdef G_OS_WIN32
#include <io.h>
#endif
#ifndef STDIN_FILENO
#define STDIN_FILENO 0
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include "gio-tool.h"
static char *global_etag = NULL;
static gboolean backup = FALSE;
static gboolean create = FALSE;
static gboolean append = FALSE;
static gboolean priv = FALSE;
static gboolean replace_dest = FALSE;
static gboolean print_etag = FALSE;
static const GOptionEntry entries[] =
{
{ "backup", 'b', 0, G_OPTION_ARG_NONE, &backup, N_("Backup existing destination files"), NULL },
{ "create", 'c', 0, G_OPTION_ARG_NONE, &create, N_("Only create if not existing"), NULL },
{ "append", 'a', 0, G_OPTION_ARG_NONE, &append, N_("Append to end of file"), NULL },
{ "private", 'p', 0, G_OPTION_ARG_NONE, &priv, N_("When creating, restrict access to the current user"), NULL },
{ "unlink", 'u', 0, G_OPTION_ARG_NONE, &replace_dest, N_("When replacing, replace as if the destination did not exist"), NULL },
/* Translators: The "etag" is a token allowing to verify whether a file has been modified */
{ "print-etag", 'v', 0, G_OPTION_ARG_NONE, &print_etag, N_("Print new etag at end"), NULL },
/* Translators: The "etag" is a token allowing to verify whether a file has been modified */
{ "etag", 'e', 0, G_OPTION_ARG_STRING, &global_etag, N_("The etag of the file being overwritten"), N_("ETAG") },
G_OPTION_ENTRY_NULL
};
/* 256k minus malloc overhead */
#define STREAM_BUFFER_SIZE (1024*256 - 2*sizeof(gpointer))
static gboolean
save (GFile *file)
{
GOutputStream *out;
GFileCreateFlags flags;
char *buffer;
gssize res;
gboolean close_res;
GError *error;
gboolean save_res;
error = NULL;
flags = priv ? G_FILE_CREATE_PRIVATE : G_FILE_CREATE_NONE;
flags |= replace_dest ? G_FILE_CREATE_REPLACE_DESTINATION : 0;
if (create)
out = (GOutputStream *)g_file_create (file, flags, NULL, &error);
else if (append)
out = (GOutputStream *)g_file_append_to (file, flags, NULL, &error);
else
out = (GOutputStream *)g_file_replace (file, global_etag, backup, flags, NULL, &error);
if (out == NULL)
{
print_file_error (file, error->message);
g_error_free (error);
return FALSE;
}
buffer = g_malloc (STREAM_BUFFER_SIZE);
save_res = TRUE;
while (1)
{
res = read (STDIN_FILENO, buffer, STREAM_BUFFER_SIZE);
if (res > 0)
{
g_output_stream_write_all (out, buffer, res, NULL, NULL, &error);
if (error != NULL)
{
save_res = FALSE;
print_file_error (file, error->message);
g_clear_error (&error);
goto out;
}
}
else if (res < 0)
{
save_res = FALSE;
print_error ("%s", _("Error reading from standard input"));
break;
}
else if (res == 0)
break;
}
out:
close_res = g_output_stream_close (out, NULL, &error);
if (!close_res)
{
save_res = FALSE;
print_file_error (file, error->message);
g_error_free (error);
}
if (close_res && print_etag)
{
char *etag;
etag = g_file_output_stream_get_etag (G_FILE_OUTPUT_STREAM (out));
if (etag)
g_print ("Etag: %s\n", etag);
else
/* Translators: The "etag" is a token allowing to verify whether a file has been modified */
g_print (_("Etag not available\n"));
g_free (etag);
}
g_object_unref (out);
g_free (buffer);
return save_res;
}
int
handle_save (int argc, char *argv[], gboolean do_help)
{
GOptionContext *context;
GError *error = NULL;
GFile *file;
gboolean res;
g_set_prgname ("gio save");
/* Translators: commandline placeholder */
context = g_option_context_new (_("DESTINATION"));
g_option_context_set_help_enabled (context, FALSE);
g_option_context_set_summary (context,
_("Read from standard input and save to DEST."));
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 destination given"));
g_option_context_free (context);
return 1;
}
if (argc > 2)
{
show_help (context, _("Too many arguments"));
g_option_context_free (context);
return 1;
}
g_option_context_free (context);
file = g_file_new_for_commandline_arg (argv[1]);
res = save (file);
g_object_unref (file);
return res ? 0 : 2;
}
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