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From: Junio C Hamano <gitster@pobox.com>
To: Miriam Rubio <mirucam@gmail.com>
Cc: git@vger.kernel.org, Christian Couder <chriscool@tuxfamily.org>,
	Johannes Schindelin <Johannes.Schindelin@gmx.de>
Subject: Re: [PATCH v5 03/13] bisect--helper: introduce new `write_in_file()` function
Date: Fri, 17 Jul 2020 09:33:57 -0700	[thread overview]
Message-ID: <xmqqzh7ydrt6.fsf@gitster.c.googlers.com> (raw)
In-Reply-To: <20200717105406.82226-4-mirucam@gmail.com> (Miriam Rubio's message of "Fri, 17 Jul 2020 12:53:56 +0200")

Miriam Rubio <mirucam@gmail.com> writes:

> +	fp = fopen(path, mode);
> +	if (!fp)
> +		return error_errno(_("cannot open file '%s' in mode '%s'"), path, mode);
> +	res = vfprintf(fp, format, args);
> +
> +	if (res < 0) {
> +		fclose(fp);
> +		return error_errno(_("could not write to file '%s'"), path);

If the fclose(fp) failed, the errno from that failure (i.e. why fp
cannot be closed) would be reported by the error_errno(), which may
not be ideal.  Either use just error() (which may be suboptimal),
follow an often-used pattern to use save_errno (grep for the symbol
to learn from the existing code) and keep using error_errno(), or
check errors from fclose() too (which may be overkill).

	if (res < 0) {
		int saved_errno = errno;
#if OVERKILL
		if (fclose(fp))
                	error_errno(_("..."));
#else
		fclose(fp);
#endif
		errno = saved_errno;
		return error_errno(_("..."), ...);
	}

  reply	other threads:[~2020-07-17 16:34 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-17 10:53 [PATCH v5 00/13] Finish converting git bisect to C part 2 Miriam Rubio
2020-07-17 10:53 ` [PATCH v5 01/13] bisect--helper: BUG() in cmd_*() on invalid subcommand Miriam Rubio
2020-07-25 17:27   ` Shourya Shukla
2020-07-17 10:53 ` [PATCH v5 02/13] bisect--helper: use '-res' in 'cmd_bisect__helper' return Miriam Rubio
2020-07-25 17:31   ` Shourya Shukla
2020-07-25 23:03     ` Junio C Hamano
2020-07-27  5:42     ` Pratyush Yadav
2020-07-27  6:46       ` Pratyush Yadav
2020-07-27 16:21         ` Junio C Hamano
2020-07-17 10:53 ` [PATCH v5 03/13] bisect--helper: introduce new `write_in_file()` function Miriam Rubio
2020-07-17 16:33   ` Junio C Hamano [this message]
2020-07-17 10:53 ` [PATCH v5 04/13] bisect--helper: reimplement `bisect_autostart` shell function in C Miriam Rubio
2020-07-26  1:53   ` Đoàn Trần Công Danh
2020-07-17 10:53 ` [PATCH v5 05/13] bisect: call 'clear_commit_marks_all()' in 'bisect_next_all()' Miriam Rubio
2020-07-17 10:53 ` [PATCH v5 06/13] bisect--helper: reimplement `bisect_next` and `bisect_auto_next` shell functions in C Miriam Rubio
2020-07-17 16:54   ` Junio C Hamano
2020-07-25  0:19     ` Junio C Hamano
2020-07-17 10:54 ` [PATCH v5 07/13] bisect--helper: finish porting `bisect_start()` to C Miriam Rubio
2020-07-17 10:54 ` [PATCH v5 08/13] bisect--helper: retire `--bisect-clean-state` subcommand Miriam Rubio
2020-07-17 10:54 ` [PATCH v5 09/13] bisect--helper: retire `--next-all` subcommand Miriam Rubio
2020-07-17 10:54 ` [PATCH v5 10/13] bisect--helper: reimplement `bisect_state` & `bisect_head` shell functions in C Miriam Rubio
2020-07-17 10:54 ` [PATCH v5 11/13] bisect--helper: retire `--check-expected-revs` subcommand Miriam Rubio
2020-07-17 10:54 ` [PATCH v5 12/13] bisect--helper: retire `--write-terms` subcommand Miriam Rubio
2020-07-17 10:54 ` [PATCH v5 13/13] bisect--helper: retire `--bisect-autostart` subcommand Miriam Rubio

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