From: Adhemerval Zanella <adhemerval.zanella@linaro.org>
To: Florian Weimer <fweimer@redhat.com>, libc-alpha@sourceware.org
Subject: Re: [PATCH 02/26] libio: Flush-only _IO_str_overflow must not return EOF (bug 28949)
Date: Fri, 18 Mar 2022 15:11:55 -0300 [thread overview]
Message-ID: <2b11f23c-cd88-6eea-9c70-c26769f62e85@linaro.org> (raw)
In-Reply-To: <ff81d93901347fa0c78de22f0f9d6f8283ed627c.1647544751.git.fweimer@redhat.com>
On 17/03/2022 16:28, Florian Weimer via Libc-alpha wrote:
> In general, _IO_str_overflow returns the character passed as an argument
> on success. However, if flush-only operation is requested by passing
> EOF, returning EOF looks like an error, and the caller cannot tell
> whether the operation was successful or not.
>
> _IO_wstr_overflow had the same bug regarding WEOF.
LGTM, thanks.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
> ---
> libio/strops.c | 5 ++++-
> libio/wstrops.c | 5 ++++-
> 2 files changed, 8 insertions(+), 2 deletions(-)
>
> diff --git a/libio/strops.c b/libio/strops.c
> index 6a9a8846c4..1cd0bf6c3d 100644
> --- a/libio/strops.c
> +++ b/libio/strops.c
> @@ -133,7 +133,10 @@ _IO_str_overflow (FILE *fp, int c)
> *fp->_IO_write_ptr++ = (unsigned char) c;
> if (fp->_IO_write_ptr > fp->_IO_read_end)
> fp->_IO_read_end = fp->_IO_write_ptr;
> - return c;
> + if (flush_only)
> + return 0;
> + else
> + return c;
> }
> libc_hidden_def (_IO_str_overflow)
>
> diff --git a/libio/wstrops.c b/libio/wstrops.c
> index 8e44f86c35..2aec314937 100644
> --- a/libio/wstrops.c
> +++ b/libio/wstrops.c
> @@ -130,7 +130,10 @@ _IO_wstr_overflow (FILE *fp, wint_t c)
> *fp->_wide_data->_IO_write_ptr++ = c;
> if (fp->_wide_data->_IO_write_ptr > fp->_wide_data->_IO_read_end)
> fp->_wide_data->_IO_read_end = fp->_wide_data->_IO_write_ptr;
> - return c;
> + if (flush_only)
> + return 0;
> + else
> + return c;
> }
>
>
next prev parent reply other threads:[~2022-03-18 18:11 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-17 19:28 [PATCH 00/26] vfprintf rework to remove vtables Florian Weimer
2022-03-17 19:28 ` [PATCH 01/26] libio: Convert tst_swprintf to the test framework Florian Weimer
2022-03-18 17:40 ` Adhemerval Zanella
2022-03-17 19:28 ` [PATCH 02/26] libio: Flush-only _IO_str_overflow must not return EOF (bug 28949) Florian Weimer
2022-03-18 18:11 ` Adhemerval Zanella [this message]
2022-03-17 19:28 ` [PATCH 03/26] stdio-common: Add wide stream coverage to tst-vfprintf-user-type Florian Weimer
2022-03-18 18:30 ` Adhemerval Zanella
2022-03-18 19:19 ` Florian Weimer
2022-03-17 19:28 ` [PATCH 04/26] stdio-common: Add tst-printf-width-i18n to cover numeric field width Florian Weimer
2022-05-20 13:22 ` Adhemerval Zanella
2022-05-20 13:33 ` Adhemerval Zanella
2022-05-23 6:39 ` Florian Weimer
2022-03-17 19:28 ` [PATCH 05/26] vfprintf: Move argument processing into vfprintf-process-arg.c Florian Weimer
2022-05-20 13:28 ` Adhemerval Zanella
2022-03-17 19:28 ` [PATCH 06/26] vfprintf: Consolidate some multibyte/wide character processing Florian Weimer
2022-05-20 14:16 ` Adhemerval Zanella
2022-03-17 19:29 ` [PATCH 07/26] __printf_fphex always uses LC_NUMERIC Florian Weimer
2022-05-20 14:21 ` Adhemerval Zanella
2022-05-23 6:55 ` Florian Weimer
2022-03-17 19:29 ` [PATCH 08/26] stdio-common: Add tst-memstream-string for open_memstream overflow Florian Weimer
2022-05-20 17:44 ` Adhemerval Zanella
2022-05-23 7:03 ` Florian Weimer
2022-03-17 19:29 ` [PATCH 09/26] stdio-common: Add printf specifier registry to <printf.h> Florian Weimer
2022-05-20 17:49 ` Adhemerval Zanella
2022-03-17 19:30 ` [PATCH 10/26] stdio-common: Move union printf_arg int <printf.h> Florian Weimer
2022-05-20 17:51 ` Adhemerval Zanella
2022-03-17 19:30 ` [PATCH 11/26] stdio-common: Simplify printf_unknown interface in vfprintf-internal.c Florian Weimer
2022-05-20 18:07 ` Adhemerval Zanella
2022-03-17 19:30 ` [PATCH 12/26] locale: Call _nl_unload_locale from _nl_archive_subfreeres Florian Weimer
2022-05-20 18:09 ` Adhemerval Zanella
2022-05-23 7:14 ` Florian Weimer
2022-03-17 19:30 ` [PATCH 13/26] locale: Remove cleanup function pointer from struct __localedata Florian Weimer
2022-05-20 18:16 ` Adhemerval Zanella
2022-03-17 19:30 ` [PATCH 14/26] locale: Remove private union from struct __locale_data Florian Weimer
2022-05-20 18:22 ` Adhemerval Zanella
2022-03-17 19:30 ` [PATCH 15/26] locale: Add more cached data to LC_CTYPE Florian Weimer
2022-05-20 18:29 ` Adhemerval Zanella
2022-05-23 7:20 ` Florian Weimer
2022-03-17 19:31 ` [PATCH 16/26] locale: Implement struct grouping_iterator Florian Weimer
2022-03-17 19:31 ` [PATCH 17/26] stdio-common: Introduce buffers for implementing printf Florian Weimer
2022-03-17 19:31 ` [PATCH 18/26] stdio-common: Add __printf_function_invoke Florian Weimer
2022-03-17 19:31 ` [PATCH 19/26] stdio-common: Add __translated_number_width Florian Weimer
2022-03-17 19:31 ` [PATCH 20/26] stdio-common: Convert vfprintf and related functions to buffers Florian Weimer
2022-03-17 19:31 ` [PATCH 21/26] stdio-common: Add lock optimization to vfprintf and vfwprintf Florian Weimer
2022-03-17 19:31 ` [PATCH 22/26] libio: Convert __vsprintf_internal to buffers Florian Weimer
2022-03-17 19:31 ` [PATCH 23/26] libio: Convert __vasprintf_internal " Florian Weimer
2022-03-17 19:31 ` [PATCH 24/26] libio: Convert __vdprintf_internal " Florian Weimer
2022-03-17 19:32 ` [PATCH 25/26] libio: Convert __obstack_vprintf_internal to buffers (bug 27124) Florian Weimer
2022-03-17 19:32 ` [PATCH 26/26] libio: Convert __vswprintf_internal to buffers (bug 27857) Florian Weimer
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