err.3: EXAMPLES: use EXIT_FAILURE rather than 1 as exit status

[thirdparty/man-pages.git] / man3 / erf.3

diff --git a/man3/erf.3 b/man3/erf.3
index 00ff93f70102cec30b48f4d11632a67467728374..c9fc0bea741ced190c84a31216160528163fccbb 100644 (file)
--- a/man3/erf.3
+++ b/man3/erf.3
@@ -2,6 +2,7 @@
 .\" and Copyright 2008, Linux Foundation, written by Michael Kerrisk
 .\"     <mtk.manpages@gmail.com>
 .\"
+.\" %%%LICENSE_START(VERBATIM)
 .\" Permission is granted to make and distribute verbatim copies of this
 .\" manual provided the copyright notice and this permission notice are
 .\" preserved on all copies.
@@ -21,6 +22,7 @@
 .\"
 .\" Formatted or processed versions of this manual, if unaccompanied by
 .\" the source, must acknowledge the copyright and authors of this work.
+.\" %%%LICENSE_END
 .\"
 .\" References consulted:
 .\"     Linux libc source code
@@ -30,70 +32,65 @@
 .\" Modified 2002-07-27 by Walter Harms
 .\"    (walter.harms@informatik.uni-oldenburg.de)
 .\"
-.TH ERF 3  2008-08-05 "GNU" "Linux Programmer's Manual"
+.TH ERF 3  2017-09-15 "GNU" "Linux Programmer's Manual"
 .SH NAME
-erf, erff, erfl, \- error function
+erf, erff, erfl \- error function
 .SH SYNOPSIS
 .nf
 .B #include <math.h>
-
+.PP
 .BI "double erf(double " x );
 .BI "float erff(float " x );
 .BI "long double erfl(long double " x );
-
+.PP
 .fi
 Link with \fI\-lm\fP.
-.sp
+.PP
 .in -4n
 Feature Test Macro Requirements for glibc (see
 .BR feature_test_macros (7)):
 .in
-.sp
+.PP
 .ad l
 .BR erf ():
 .RS 4
-_BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE || _ISOC99_SOURCE ||
-_POSIX_C_SOURCE\ >=\ 200112L;
-.br
-or
-.I cc\ -std=c99
+_ISOC99_SOURCE || _POSIX_C_SOURCE\ >=\ 200112L || _XOPEN_SOURCE
+    || /* Since glibc 2.19: */ _DEFAULT_SOURCE
+    || /* Glibc versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
 .RE
 .br
 .BR erff (),
 .BR erfl ():
 .RS 4
-_BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE\ >=\ 600 || _ISOC99_SOURCE ||
-_POSIX_C_SOURCE\ >=\ 200112L;
-.br
-or
-.I cc\ -std=c99
+_ISOC99_SOURCE || _POSIX_C_SOURCE\ >=\ 200112L
+    || /* Since glibc 2.19: */ _DEFAULT_SOURCE
+    || /* Glibc versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
 .RE
 .ad b
 .SH DESCRIPTION
-The
-.BR erf ()
-function returns the error function of \fIx\fP, defined
-as
+These functions return the error function of
+.IR x ,
+defined as
 .TP
-    erf(x) = 2/sqrt(pi)* integral from 0 to x of exp(\-t*t) dt
+    erf(x) = 2/sqrt(pi) * integral from 0 to x of exp(\-t*t) dt
 .SH RETURN VALUE
-On success, these functions return the error function of
+On success, these functions return the value of the error function of
 .IR x ,
 a value in the range [\-1,\ 1].
-
+.PP
 If
 .I x
 is a NaN, a NaN is returned.
-
+.PP
 If
 .I x
 is +0 (\-0), +0 (\-0) is returned.
-
+.PP
 If
 .I x
 is positive infinity (negative infinity),
 +1 (\-1) is returned.
-
+.PP
 If
 .I x
 is subnormal,
@@ -117,15 +114,30 @@ is raised.
 .PP
 These functions do not set
 .IR errno .
-.\" FIXME . Is it intentional that these functions do not set errno?
-.\" Bug raised: http://sources.redhat.com/bugzilla/show_bug.cgi?id=6785
-.SH "CONFORMING TO"
-C99, POSIX.1-2001.
+.\" It is intentional that these functions do not set errno for this case
+.\" see http://sources.redhat.com/bugzilla/show_bug.cgi?id=6785
+.SH ATTRIBUTES
+For an explanation of the terms used in this section, see
+.BR attributes (7).
+.TS
+allbox;
+lbw21 lb lb
+l l l.
+Interface      Attribute       Value
+T{
+.BR erf (),
+.BR erff (),
+.BR erfl ()
+T}     Thread safety   MT-Safe
+.TE
+.SH CONFORMING TO
+C99, POSIX.1-2001, POSIX.1-2008.
+.PP
 The variant returning
 .I double
 also conforms to
 SVr4, 4.3BSD.
-.SH "SEE ALSO"
+.SH SEE ALSO
 .BR cerf (3),
 .BR erfc (3),
 .BR exp (3)