mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-21 20:40:05 +00:00
77 lines
2.3 KiB
C
77 lines
2.3 KiB
C
/* Invoke the system diff tool to compare two strings.
|
|
Copyright (C) 2016-2024 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C 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.
|
|
|
|
The GNU C 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 the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <support/run_diff.h>
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <support/check.h>
|
|
#include <support/support.h>
|
|
#include <support/temp_file.h>
|
|
#include <support/xunistd.h>
|
|
#include <sys/wait.h>
|
|
|
|
static char *
|
|
write_to_temp_file (const char *prefix, const char *str)
|
|
{
|
|
char *template = xasprintf ("run_diff-%s", prefix);
|
|
char *name = NULL;
|
|
int fd = create_temp_file (template, &name);
|
|
TEST_VERIFY_EXIT (fd >= 0);
|
|
free (template);
|
|
xwrite (fd, str, strlen (str));
|
|
xclose (fd);
|
|
return name;
|
|
}
|
|
|
|
void
|
|
support_run_diff (const char *left_label, const char *left,
|
|
const char *right_label, const char *right)
|
|
{
|
|
/* Ensure that the diff command output is ordered properly with
|
|
standard output. */
|
|
TEST_VERIFY_EXIT (fflush (stdout) == 0);
|
|
|
|
char *left_path = write_to_temp_file ("left-diff", left);
|
|
char *right_path = write_to_temp_file ("right-diff", right);
|
|
|
|
pid_t pid = xfork ();
|
|
if (pid == 0)
|
|
{
|
|
execlp ("diff", "diff", "-u",
|
|
"--label", left_label, "--label", right_label,
|
|
"--", left_path, right_path,
|
|
NULL);
|
|
_exit (17);
|
|
}
|
|
else
|
|
{
|
|
int status;
|
|
xwaitpid (pid, &status, 0);
|
|
if (!WIFEXITED (status) || WEXITSTATUS (status) != 1)
|
|
printf ("warning: could not run diff, exit status: %d\n"
|
|
"*** %s ***\n%s\n"
|
|
"*** %s ***\n%s\n",
|
|
status, left_label, left, right_label, right);
|
|
}
|
|
|
|
free (right_path);
|
|
free (left_path);
|
|
}
|