Function openQueryOutputFile

src/bin/psql/common.c:49–75

* openQueryOutputFile --- attempt to open a query output file * * fname == NULL selects stdout, else an initial '|' selects a pipe, * else plain file. * * Returns output file pointer into *fout, and is-a-pipe flag into *is_pipe. * Caller is responsible for adjusting SIGPIPE state if it's a pipe. * * On error, reports suitable error message and returns false. */

 * On error, reports suitable error message and returns false.
 */
bool
openQueryOutputFile(const char *fname, FILE **fout, bool *is_pipe)
{
	if (!fname || fname[0] == '\0')
	{
		*fout = stdout;
		*is_pipe = false;
	}
	else if (*fname == '|')
	{
		*fout = popen(fname + 1, "w");
		*is_pipe = true;
	}
	else
	{
		*fout = fopen(fname, "w");
		*is_pipe = false;
	}

	if (*fout == NULL)
	{
		pg_log_error("%s: %m", fname);
		return false;
	}

	return true;
}

/*
 * setQFout