coreutils: fix uptime command

coreutils doesn't handle absent utmp files
fix #6405

sys-apps/coreutils/coreutils-9.0.recipe

@@ -17,7 +17,7 @@ uptime users vdir wc who whoami yes"
 HOMEPAGE="https://www.gnu.org/software/coreutils/"
 COPYRIGHT="1994-2017 Free Software Foundation, Inc."
 LICENSE="GNU GPL v3"
-REVISION="5"
+REVISION="6"
 SOURCE_URI="https://ftpmirror.gnu.org/coreutils/coreutils-$portVersion.tar.xz
 	https://ftp.gnu.org/gnu/coreutils/coreutils-$portVersion.tar.xz"
 CHECKSUM_SHA256="ce30acdf4a41bc5bb30dd955e9eaa75fa216b4e3deb08889ed32433c7b3b97ce"
@@ -154,6 +154,7 @@ fi
 BUILD_PREREQUIRES="
 	haiku${secondaryArchSuffix}_devel
 	cmd:awk
+	cmd:cmp
 	cmd:gcc$secondaryArchSuffix
 	cmd:grep
 	cmd:help2man

sys-apps/coreutils/patches/coreutils-9.0.patchset

@@ -697,3 +697,40 @@ index c7eb740..dde3e4b 100644
 -- 
 2.30.2
 
+From ce0ad419f18d006929850e56b6fd2d50f1857789 Mon Sep 17 00:00:00 2001
+From: Jerome Duval <jerome.duval@gmail.com>
+Date: Tue, 16 Nov 2021 10:22:30 +0100
+Subject: [PATCH] uptime: make utmp error not critical
+
+---
+ src/uptime.c | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/src/uptime.c b/src/uptime.c
+index fc0f0a5..779fc09 100644
+--- a/src/uptime.c
++++ b/src/uptime.c
+@@ -105,7 +105,7 @@ print_uptime (size_t n, const STRUCT_UTMP *this)
+ #if HAVE_UTMPX_H || HAVE_UTMP_H
+   /* Loop through all the utmp entries we just read and count up the valid
+      ones, also in the process possibly gleaning boottime. */
+-  while (n--)
++  while (this && n--)
+     {
+       entries += IS_USER_PROCESS (this);
+       if (UT_TYPE_BOOT_TIME (this))
+@@ -181,7 +181,11 @@ uptime (char const *filename, int options)
+ 
+ #if HAVE_UTMPX_H || HAVE_UTMP_H
+   if (read_utmp (filename, &n_users, &utmp_buf, options) != 0)
++#if HAVE_OS_H
++     ;
++#else
+     die (EXIT_FAILURE, errno, "%s", quotef (filename));
++#endif
+ #endif
+ 
+   print_uptime (n_users, utmp_buf);
+-- 
+2.30.2
+