X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=doc%2Fposix-functions%2Fstrerror.texi;h=21fc990659a32e3ffde1a3ee4da7b7b6a7e7e663;hb=4596125141aeea905bd7ed1a8768f11db7402e41;hp=434b98f377e6e3bca1834ee9c8269a431f066d65;hpb=09ef7461110822a3970aa8eebcfaa740996a82f2;p=gnulib.git

diff --git a/doc/posix-functions/strerror.texi b/doc/posix-functions/strerror.texi
index 434b98f37..21fc99065 100644
--- a/doc/posix-functions/strerror.texi
+++ b/doc/posix-functions/strerror.texi
@@ -2,22 +2,30 @@
 @section @code{strerror}
 @findex strerror
 
-POSIX specification: @url{http://www.opengroup.org/onlinepubs/9699919799/functions/strerror.html}
+POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/strerror.html}
 
 Gnulib module: strerror
 
 Portability problems fixed by Gnulib:
 @itemize
 @item
-This function is missing on some old platforms.
-@item
 This function does not support the error values that are specified by POSIX
 but not defined by the system, on some platforms:
-OpenBSD 4.0, OSF/1 5.1, Cygwin, mingw.
+OpenBSD 4.0, OSF/1 5.1, NonStop Kernel, Cygwin 1.5.x, mingw.
+@item
+This function reports failure for @code{strerror(0)} (by setting
+@code{errno} or using a string similar to out-of-range values),
+although POSIX requires this to leave @code{errno} unchanged and
+report success, on some platforms:
+FreeBSD 8.2, OpenBSD 4.7, MacOS X 10.5.
 @item
 This function fails to return a string for out-of-range integers on
 some platforms:
-Solaris 8.
+HP-UX 11, IRIX 6.5, Solaris 8.
+(Some return NULL which is a POSIX violation, others return the empty
+string which is valid but not as useful); this can still cause bugs
+because most programs call @code{strerror} without setting and testing
+@code{errno}.)
 @end itemize
 
 Portability problems not fixed by Gnulib: