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/*
* Copyright © 2021 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/>.
*
* Authors: Matthias Clasen <mclasen@redhat.com>
*/
#include <glib.h>
#include <glib/gstdio.h>
#include <unistd.h>
#include "testsuite/testutils.h"
char *
diff_with_file (const char *file1,
char *text,
gssize len,
GError **error)
{
const char *command[] = { "diff", "-u", file1, NULL, NULL };
char *diff, *tmpfile;
int fd;
diff = NULL;
if (g_find_program_in_path ("diff"))
{
if (len < 0)
len = strlen (text);
/* write the text buffer to a temporary file */
fd = g_file_open_tmp (NULL, &tmpfile, error);
if (fd < 0)
return NULL;
if (write (fd, text, len) != (int) len)
{
close (fd);
g_set_error (error,
G_FILE_ERROR, G_FILE_ERROR_FAILED,
"Could not write data to temporary file '%s'", tmpfile);
goto done;
}
close (fd);
command[3] = tmpfile;
/* run diff command */
g_spawn_sync (NULL,
(char **) command,
NULL,
G_SPAWN_SEARCH_PATH,
NULL, NULL,
&diff,
NULL, NULL,
error);
done:
g_unlink (tmpfile);
g_free (tmpfile);
}
else
{
char *buf1;
gsize len1;
if (!g_file_get_contents (file1, &buf1, &len1, error))
return NULL;
if ((len != -1 && len != len1) ||
strncmp (text, buf1, len1) != 0)
diff = g_strdup ("Files differ.\n");
g_free (buf1);
}
return diff;
}
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