Function check_exec

src/bin/pg_upgrade/exec.c:431–469

}

static void
check_exec(const char *dir, const char *program, bool check_version)
{
	char	path[MAXPGPATH];
	char	line[MAXPGPATH];
	char	cmd[MAXPGPATH];
	char	versionstr[128];
	char	gp_versionstr[128];
	int		ret;

	snprintf(path, sizeof(path), "%s/%s", dir, program);

	ret = validate_exec(path);

	if (ret == -1)
		pg_fatal("check for \"%s\" failed: not a regular file\n",
				 path);
	else if (ret == -2)
		pg_fatal("check for \"%s\" failed: cannot execute (permission denied)\n",
				 path);

	snprintf(cmd, sizeof(cmd), "\"%s\" -V", path);

	if (!pipe_read_line(cmd, line, sizeof(line)))
		pg_fatal("check for \"%s\" failed: cannot execute\n",
				 path);

	if (check_version)
	{
		pg_strip_crlf(line);

		snprintf(versionstr, sizeof(versionstr), "%s (PostgreSQL) " PG_VERSION, program);
		snprintf(gp_versionstr, sizeof(versionstr), "%s (Apache Cloudberry) " PG_VERSION, program);

		if (strcmp(line, versionstr) != 0 && strcmp(line, gp_versionstr) != 0)
			pg_fatal("check for \"%s\" failed: incorrect version: found \"%s\", expected \"%s\" or \"%s\"\n",
					 path, line, versionstr, gp_versionstr);
	}
}