Date: Wed, 22 Jun 2011 10:14:01 -0700 From: Joe Perches <joe@...ches.com> To: Vasiliy Kulikov <segoon@...nwall.com> Cc: Andrew Morton <akpm@...ux-foundation.org>, James Morris <jmorris@...ei.org>, Ingo Molnar <mingo@...e.hu>, Namhyung Kim <namhyung@...il.com>, Greg Kroah-Hartman <gregkh@...e.de>, kernel-hardening@...ts.openwall.com, linux-kernel@...r.kernel.org, security@...nel.org Subject: Re: [PATCH] kernel: escape non-ASCII and control characters in printk() On Wed, 2011-06-22 at 20:53 +0400, Vasiliy Kulikov wrote: > On Wed, Jun 22, 2011 at 09:38 -0700, Joe Perches wrote: > > > + if ((c >= ' ' && c < 127) || c == '\n') > > if (isprint(c)) > #define isprint(c) ((__ismask(c)&(_P|_U|_L|_D|_SP)) != 0) > It slightly differs from what I've written. It (1) lacks '\n', You still need tab, so: if (isprint(c) || isspace(c)) > (2) passes non-ASCII symbols. > How would non-ASCII symbols look like if > terminal doesn't support it? (I don't know, merely asking). I believe most would work fine. Are there any lp01's or la36's still connected to a serial console? I don't know what would happen to a 7 bit ascii only device.
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