From 049f63824c654ca10dc9073decc139ccd2f9a06b Mon Sep 17 00:00:00 2001 From: Colin Watson Date: Fri, 17 Jan 2014 02:28:46 +0000 Subject: [PATCH] Ignore EPERM when modifying kern.geom.debugflags Many tests fail when run as a non-root user on FreeBSD. The failures all amount to an inability to open files using grub_util_fd_open, because we cannot set the kern.geom.debugflags sysctl. This sysctl is indeed important to allow us to do such things as installing GRUB to the MBR, but if we need to do that and can't then we will get an error later. Enforcing it here is unnecessary and prevents otherwise perfectly reasonable operations. --- ChangeLog | 7 +++++++ grub-core/osdep/freebsd/hostdisk.c | 12 ++++++++++-- 2 files changed, 17 insertions(+), 2 deletions(-) diff --git a/ChangeLog b/ChangeLog index 4688ff4e6..10abfe28f 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,10 @@ +2014-01-19 Colin Watson + + * grub-core/osdep/freebsd/hostdisk.c (grub_util_fd_open): Ignore + EPERM when modifying kern.geom.debugflags. It is only a problem for + such things as installing GRUB to the MBR, in which case there'll be + an error later anyway, not for opening files during tests. + 2014-01-18 Andrey Borzenkov * grub-core/Makefile.am: Build grub_emu_init.[ch] from MODULE_FILES diff --git a/grub-core/osdep/freebsd/hostdisk.c b/grub-core/osdep/freebsd/hostdisk.c index eb202dcc8..6145d0735 100644 --- a/grub-core/osdep/freebsd/hostdisk.c +++ b/grub-core/osdep/freebsd/hostdisk.c @@ -102,8 +102,16 @@ grub_util_fd_open (const char *os_dev, int flags) if (! (sysctl_oldflags & 0x10) && sysctlbyname ("kern.geom.debugflags", NULL , 0, &sysctl_flags, sysctl_size)) { - grub_error (GRUB_ERR_BAD_DEVICE, "cannot set flags of sysctl kern.geom.debugflags"); - return GRUB_UTIL_FD_INVALID; + if (errno == EPERM) + /* Running as an unprivileged user; don't worry about restoring + flags, although if we try to write to anything interesting such + as the MBR then we may fail later. */ + sysctl_oldflags = 0x10; + else + { + grub_error (GRUB_ERR_BAD_DEVICE, "cannot set flags of sysctl kern.geom.debugflags"); + return GRUB_UTIL_FD_INVALID; + } } ret = open (os_dev, flags, S_IROTH | S_IRGRP | S_IRUSR | S_IWUSR);