path: root/manual
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authorFlorian Weimer <fweimer@redhat.com>2020-10-07 14:55:04 +0200
committerFlorian Weimer <fweimer@redhat.com>2020-10-07 14:55:50 +0200
commit27fe5f2e67a0e4cc0526b1b32b55f8e519075edb (patch)
treeef5c44eece0ca4d809f072533d4a30d71d5aa09a /manual
parent0f9793a556675d67d7c1897553f92e7152d1e598 (diff)
Linux: Require properly configured /dev/pts for PTYs
Current systems do not have BSD terminals, so the fallback code in posix_openpt/getpt does not do anything. Also remove the file system check for /dev/pts. Current systems always have a devpts file system mounted there if /dev/ptmx exists. grantpt is now essentially a no-op. It only verifies that the argument is a ptmx-descriptor. Therefore, this change indirectly addresses bug 24941. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'manual')
1 files changed, 3 insertions, 8 deletions
diff --git a/manual/install.texi b/manual/install.texi
index 735e99bb035..2e164476d57 100644
--- a/manual/install.texi
+++ b/manual/install.texi
@@ -218,14 +218,9 @@ increased program load times.
@item --enable-pt_chown
The file @file{pt_chown} is a helper binary for @code{grantpt}
(@pxref{Allocation, Pseudo-Terminals}) that is installed setuid root to
-fix up pseudo-terminal ownership. It is not built by default because
-systems using the Linux kernel are commonly built with the @code{devpts}
-filesystem enabled and mounted at @file{/dev/pts}, which manages
-pseudo-terminal ownership automatically. By using
-@samp{--enable-pt_chown}, you may build @file{pt_chown} and install it
-setuid and owned by @code{root}. The use of @file{pt_chown} introduces
-additional security risks to the system and you should enable it only if
-you understand and accept those risks.
+fix up pseudo-terminal ownership on GNU/Hurd. It is not required on
+GNU/Linux, and @theglibc{} will not use the installed @file{pt_chown}
+program when configured with @option{--enable-pt_chown}.
@item --disable-werror
By default, @theglibc{} is built with @option{-Werror}. If you wish