From: Jonny Grant <jg@jguk.org>
To: linux-man <linux-man@vger.kernel.org>,
"Alejandro Colomar (man-pages)" <alx.manpages@gmail.com>
Subject: strncpy clarify result may not be null terminated
Date: Sat, 4 Nov 2023 11:27:44 +0000 [thread overview]
Message-ID: <cfbd8674-fe6a-4430-95f1-ec8bde7da32e@jguk.org> (raw)
Hello
I have a suggestion for strncpy.
C23 draft states this caveat for strncpy.
"373) Thus, if there is no null character in the first n characters of the array pointed to by s2, the result will not be null-
terminated."
https://man7.org/linux/man-pages/man3/strncpy.3.html
"If the destination buffer, limited by its size, isn't large
enough to hold the copy, the resulting character sequence is
truncated. "
How about clarifying this as:
"If the destination buffer, limited by its size, isn't large
enough to hold the copy, the resulting character sequence is
truncated; where there is no null terminating byte in the first n
characters the result will not be null terminated. "
Kind regards, Jonny
next reply other threads:[~2023-11-04 11:27 UTC|newest]
Thread overview: 138+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-04 11:27 Jonny Grant [this message]
2023-11-04 19:33 ` strncpy clarify result may not be null terminated Alejandro Colomar
2023-11-04 21:18 ` Jonny Grant
2023-11-05 1:36 ` Alejandro Colomar
2023-11-05 21:16 ` Jonny Grant
2023-11-05 23:31 ` Alejandro Colomar
2023-11-07 11:52 ` Jonny Grant
2023-11-07 13:23 ` Alejandro Colomar
2023-11-07 14:19 ` Jonny Grant
2023-11-07 16:17 ` Alejandro Colomar
2023-11-07 17:00 ` Jonny Grant
2023-11-07 17:20 ` Alejandro Colomar
2023-11-08 6:18 ` Oskari Pirhonen
2023-11-08 9:51 ` Alejandro Colomar
2023-11-08 9:59 ` Thorsten Kukuk
2023-11-08 15:09 ` Alejandro Colomar
[not found] ` <6bcad2492ab843019aa63895beaea2ce@DB6PR04MB3255.eurprd04.prod.outlook.com>
2023-11-08 15:44 ` Thorsten Kukuk
2023-11-08 17:26 ` Adhemerval Zanella Netto
2023-11-08 14:06 ` Zack Weinberg
2023-11-08 15:07 ` Alejandro Colomar
2023-11-08 19:45 ` G. Branden Robinson
2023-11-08 21:35 ` Carlos O'Donell
2023-11-08 22:11 ` Alejandro Colomar
2023-11-08 23:31 ` Paul Eggert
2023-11-09 0:29 ` Alejandro Colomar
2023-11-09 10:13 ` Jonny Grant
2023-11-09 11:08 ` catenate vs concatenate (was: strncpy clarify result may not be null terminated) Alejandro Colomar
2023-11-09 14:06 ` catenate vs concatenate Jonny Grant
2023-11-27 14:33 ` catenate vs concatenate (was: strncpy clarify result may not be null terminated) Zack Weinberg
2023-11-27 15:08 ` Alejandro Colomar
2023-11-27 15:13 ` Alejandro Colomar
2023-11-27 16:59 ` G. Branden Robinson
2023-11-27 18:35 ` Zack Weinberg
2023-11-27 23:45 ` G. Branden Robinson
2023-11-09 11:13 ` strncpy clarify result may not be null terminated Alejandro Colomar
2023-11-09 14:05 ` Jonny Grant
2023-11-09 15:04 ` Alejandro Colomar
2023-11-08 19:04 ` DJ Delorie
2023-11-08 19:40 ` Alejandro Colomar
2023-11-08 19:58 ` DJ Delorie
2023-11-08 20:13 ` Alejandro Colomar
2023-11-08 21:07 ` DJ Delorie
2023-11-08 21:50 ` Alejandro Colomar
2023-11-08 22:17 ` [PATCH] stpncpy.3, string_copying.7: Clarify that st[rp]ncpy() do NOT produce a string Alejandro Colomar
2023-11-08 23:06 ` Paul Eggert
2023-11-08 23:28 ` DJ Delorie
2023-11-09 0:24 ` Alejandro Colomar
2023-11-09 14:11 ` Jonny Grant
2023-11-09 14:35 ` Alejandro Colomar
2023-11-09 14:47 ` Jonny Grant
2023-11-09 15:02 ` Alejandro Colomar
2023-11-09 17:30 ` DJ Delorie
2023-11-09 17:54 ` Andreas Schwab
2023-11-09 18:00 ` Alejandro Colomar
2023-11-09 19:42 ` Jonny Grant
2023-11-09 7:23 ` Oskari Pirhonen
2023-11-09 15:20 ` [PATCH v2 1/2] " Alejandro Colomar
2023-11-09 15:20 ` [PATCH v2 2/2] stpncpy.3, string.3, string_copying.7: Clarify that st[rp]ncpy() pad with null bytes Alejandro Colomar
2023-11-10 5:47 ` Oskari Pirhonen
2023-11-10 10:47 ` Alejandro Colomar
2023-11-08 2:12 ` strncpy clarify result may not be null terminated Matthew House
2023-11-08 19:33 ` Alejandro Colomar
2023-11-08 19:40 ` Alejandro Colomar
2023-11-09 3:13 ` Matthew House
2023-11-09 10:26 ` Jonny Grant
2023-11-09 10:31 ` Jonny Grant
2023-11-09 11:38 ` Alejandro Colomar
2023-11-09 12:43 ` Alejandro Colomar
2023-11-09 12:51 ` Xi Ruoyao
2023-11-09 14:01 ` Alejandro Colomar
2023-11-09 18:11 ` Paul Eggert
2023-11-09 23:48 ` Alejandro Colomar
2023-11-10 5:36 ` Paul Eggert
2023-11-10 11:05 ` Alejandro Colomar
2023-11-10 11:47 ` Alejandro Colomar
2023-11-10 17:58 ` Paul Eggert
2023-11-10 18:36 ` Alejandro Colomar
2023-11-10 20:19 ` Alejandro Colomar
2023-11-10 23:44 ` Jonny Grant
2023-11-10 19:52 ` Alejandro Colomar
2023-11-10 22:14 ` Paul Eggert
2023-11-11 21:13 ` Alejandro Colomar
2023-11-11 22:20 ` Paul Eggert
2023-11-12 9:52 ` Jonny Grant
2023-11-12 10:59 ` Alejandro Colomar
2023-11-12 20:49 ` Paul Eggert
2023-11-12 21:00 ` Alejandro Colomar
2023-11-12 21:45 ` Alejandro Colomar
2023-11-13 23:46 ` Jonny Grant
2023-11-17 21:57 ` Jonny Grant
2023-11-18 10:12 ` Alejandro Colomar
2023-11-18 23:03 ` Jonny Grant
2023-11-10 11:36 ` Jonny Grant
2023-11-10 13:15 ` Alejandro Colomar
2023-11-18 23:40 ` Jonny Grant
2023-11-20 11:56 ` Jonny Grant
2023-11-20 15:12 ` Alejandro Colomar
2023-11-20 23:08 ` Jonny Grant
2023-11-20 23:42 ` Alejandro Colomar
2023-11-10 11:23 ` Jonny Grant
2023-11-09 12:23 ` Alejandro Colomar
2023-11-09 12:35 ` Alejandro Colomar
2023-11-10 7:06 ` Oskari Pirhonen
2023-11-10 11:18 ` Alejandro Colomar
2023-11-11 7:55 ` Oskari Pirhonen
2023-11-10 16:06 ` Matthew House
2023-11-10 17:48 ` Alejandro Colomar
2023-11-13 15:01 ` Matthew House
2023-11-11 20:55 ` Jonny Grant
2023-11-11 21:15 ` Jonny Grant
2023-11-11 22:36 ` Alejandro Colomar
2023-11-11 23:19 ` Alejandro Colomar
2023-11-17 21:46 ` Jonny Grant
2023-11-18 9:37 ` PDF book of unreleased pages (was: strncpy clarify result may not be null terminated) Alejandro Colomar
2023-11-19 0:22 ` Deri
2023-11-19 1:19 ` Alejandro Colomar
2023-11-19 9:29 ` Alejandro Colomar
2023-11-19 16:21 ` Deri
2023-11-19 20:58 ` Alejandro Colomar
2023-11-20 0:46 ` G. Branden Robinson
2023-11-20 9:43 ` Alejandro Colomar
2023-11-18 9:44 ` NULL safety " Alejandro Colomar
2023-11-18 23:21 ` NULL safety Jonny Grant
2023-11-24 22:25 ` Alejandro Colomar
2023-11-25 0:57 ` Jonny Grant
2023-11-10 10:40 ` strncpy clarify result may not be null terminated Stefan Puiu
2023-11-10 11:06 ` Jonny Grant
2023-11-10 11:20 ` Alejandro Colomar
2023-11-12 9:17 ` [PATCH 0/2] Expand BUGS section of string_copying(7) Alejandro Colomar
2023-11-12 9:18 ` [PATCH 1/2] string_copying.7: BUGS: *cat(3) functions aren't always bad Alejandro Colomar
2023-11-12 9:18 ` [PATCH 2/2] string_copying.7: BUGS: Document strl{cpy,cat}(3)'s performance problems Alejandro Colomar
2023-11-12 11:26 ` [PATCH v2 0/3] Improve string_copying(7) Alejandro Colomar
2023-11-12 11:26 ` [PATCH v2 1/3] string_copying.7: BUGS: *cat(3) functions aren't always bad Alejandro Colomar
2023-11-17 21:43 ` Jonny Grant
2023-11-18 0:25 ` Signing all patches and email to this list Matthew House
2023-11-18 23:24 ` Jonny Grant
2023-11-12 11:26 ` [PATCH v2 2/3] string_copying.7: BUGS: Document strl{cpy,cat}(3)'s performance problems Alejandro Colomar
2023-11-12 11:27 ` [PATCH v2 3/3] strtcpy.3, string_copying.7: Add strtcpy(3) Alejandro Colomar
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