71 lines
2.6 KiB
Diff
71 lines
2.6 KiB
Diff
This patch is needed to allow builds with newer versions of
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the GNU libc (2.16+).
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commit 66712c23388e93e5c518ebc8515140fa0c807348
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Author: Eric Blake <eblake@redhat.com>
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Date: Thu Mar 29 13:30:41 2012 -0600
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stdio: don't assume gets any more
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Gnulib intentionally does not have a gets module, and now that C11
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and glibc have dropped it, we should be more proactive about warning
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any user on a platform that still has a declaration of this dangerous
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interface.
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* m4/stdio_h.m4 (gl_STDIO_H, gl_STDIO_H_DEFAULTS): Drop gets
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support.
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* modules/stdio (Makefile.am): Likewise.
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* lib/stdio-read.c (gets): Likewise.
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* tests/test-stdio-c++.cc: Likewise.
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* m4/warn-on-use.m4 (gl_WARN_ON_USE_PREPARE): Fix comment.
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* lib/stdio.in.h (gets): Make warning occur in more places.
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* doc/posix-functions/gets.texi (gets): Update documentation.
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Reported by Christer Solskogen.
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Signed-off-by: Eric Blake <eblake@redhat.com>
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diff --git a/lib/stdio.in.h b/lib/stdio.in.h
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index aa7b599..c377b6e 100644
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--- a/lib/stdio.in.h
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+++ b/lib/stdio.in.h
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@@ -698,22 +698,11 @@ _GL_WARN_ON_USE (getline, "getline is unportable - "
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# endif
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#endif
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-#if @GNULIB_GETS@
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-# if @REPLACE_STDIO_READ_FUNCS@ && @GNULIB_STDIO_H_NONBLOCKING@
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-# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
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-# undef gets
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-# define gets rpl_gets
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-# endif
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-_GL_FUNCDECL_RPL (gets, char *, (char *s) _GL_ARG_NONNULL ((1)));
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-_GL_CXXALIAS_RPL (gets, char *, (char *s));
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-# else
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-_GL_CXXALIAS_SYS (gets, char *, (char *s));
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-# undef gets
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-# endif
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-_GL_CXXALIASWARN (gets);
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/* It is very rare that the developer ever has full control of stdin,
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- so any use of gets warrants an unconditional warning. Assume it is
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- always declared, since it is required by C89. */
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+ so any use of gets warrants an unconditional warning; besides, C11
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+ removed it. */
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+#undef gets
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+#if HAVE_RAW_DECL_GETS
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_GL_WARN_ON_USE (gets, "gets is a security hole - use fgets instead");
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#endif
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@@ -1053,9 +1042,9 @@ _GL_WARN_ON_USE (snprintf, "snprintf is unportable - "
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# endif
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#endif
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-/* Some people would argue that sprintf should be handled like gets
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- (for example, OpenBSD issues a link warning for both functions),
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- since both can cause security holes due to buffer overruns.
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+/* Some people would argue that all sprintf uses should be warned about
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+ (for example, OpenBSD issues a link warning for it),
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+ since it can cause security holes due to buffer overruns.
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However, we believe that sprintf can be used safely, and is more
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efficient than snprintf in those safe cases; and as proof of our
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belief, we use sprintf in several gnulib modules. So this header
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