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98 lines
2.4 KiB
C
98 lines
2.4 KiB
C
/*
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* Copyright © 2021 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 Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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* Authors: Matthias Clasen <mclasen@redhat.com>
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*/
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#include <glib.h>
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#include <glib/gstdio.h>
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#ifdef G_OS_WIN32
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#include <io.h>
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#else
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#include <unistd.h>
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#endif
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#include "testsuite/testutils.h"
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char *
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diff_with_file (const char *file1,
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const char *text,
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gssize len,
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GError **error)
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{
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char *diff_cmd, *diff, *tmpfile;
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int fd;
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diff = NULL;
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diff_cmd = g_find_program_in_path ("diff");
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if (diff_cmd)
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{
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const char *command[] = { diff_cmd, "-u", file1, NULL, NULL };
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if (len < 0)
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len = strlen (text);
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/* write the text buffer to a temporary file */
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fd = g_file_open_tmp (NULL, &tmpfile, error);
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if (fd < 0)
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return NULL;
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if (write (fd, text, len) != (int) len)
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{
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close (fd);
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g_set_error (error,
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G_FILE_ERROR, G_FILE_ERROR_FAILED,
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"Could not write data to temporary file '%s'", tmpfile);
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goto done;
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}
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close (fd);
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command[3] = tmpfile;
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/* run diff command */
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g_spawn_sync (NULL,
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(char **) command,
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NULL,
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0,
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NULL, NULL,
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&diff,
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NULL, NULL,
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error);
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done:
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g_unlink (tmpfile);
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g_free (tmpfile);
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g_free (diff_cmd);
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}
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else
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{
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char *buf1;
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gsize len1;
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if (!g_file_get_contents (file1, &buf1, &len1, error))
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return NULL;
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if ((len != -1 && len != len1) ||
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strncmp (text, buf1, len1) != 0)
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diff = g_strdup ("Files differ.\n");
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g_free (buf1);
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}
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return diff;
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}
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