Date: Mon, 22 Jan 2007 17:46:46 -0500 From: Garrett Wollman <wollman@csail.mit.edu> To: =?iso-8859-2?Q?K=F8i=B9tof_=AEelechovski?= <giecrilj@stegny.2a.pl> Cc: freebsd-standards@freebsd.org Subject: return value of fprintf Message-ID: <17845.16086.313698.205301@khavrinen.csail.mit.edu> In-Reply-To: <005301c73e6c$ba6ffd00$1a01080a@POCZTOWIEC> References: <005301c73e6c$ba6ffd00$1a01080a@POCZTOWIEC>
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<<On Mon, 22 Jan 2007 22:31:50 +0100, K=F8i=B9tof =AEelechovski <giecri= lj@stegny.2a.pl> said: > The latter is correct: I get printf("abcd") =3D=3D 4 even under >/dev= /full. > (uname is Interix on x86 ver. 3.5) The FreeBSD C library is only supported as an integral part of the FreeBSD operating system. > However, the former is not: according to the ANSI C standard > <http://www.open-std.org/JTC1/SC22/WG14/www/docs/n1124.pdf> , =A77.19= .6.1/14, > printf should return a negative value in this case. The standard makes no such requirement; neither an encoding error nor an I/O error can ever be encountered in this example. The error condition will not be detected until the stream's buffer is flushed, as by fflush() or fclose(). -GAWollman
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