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core: drop check for /etc/mtab

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util-linux 2.27.1 now entirely stops looking at /etc/mtab, so we don't need to
verify /etc/mtab during early boot any more. Later on, tmpfiles.d/etc.conf will
fix /etc/mtab anyway, so there's not even a point in warning about it.

Drop test_mtab() and bump the util-linux dependency to >= 2.17.1.

Fixes #1495
This commit is contained in:
Martin Pitt 2015-11-02 10:05:20 -06:00
parent 0fc85c8670
commit 1d40ddbfd3
3 changed files with 3 additions and 31 deletions
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4
README
View File

@ -122,7 +122,7 @@ REQUIREMENTS:
glibc >= 2.16
libcap
libmount >= 2.27 (from util-linux)
libmount >= 2.27.1 (from util-linux)
libseccomp >= 1.0.0 (optional)
libblkid >= 2.24 (from util-linux) (optional)
libkmod >= 15 (optional)
@ -144,7 +144,7 @@ REQUIREMENTS:
During runtime, you need the following additional
dependencies:
util-linux >= v2.27 required
util-linux >= v2.27.1 required
dbus >= 1.4.0 (strictly speaking optional, but recommended)
dracut (optional)
PolicyKit (optional)

2
configure.ac
View File

@ -437,7 +437,7 @@ AM_CONDITIONAL(HAVE_BLKID, [test "$have_blkid" = "yes"])
# ------------------------------------------------------------------------------
have_libmount=no
PKG_CHECK_MODULES(MOUNT, [ mount >= 2.27 ],
PKG_CHECK_MODULES(MOUNT, [ mount >= 2.27.1 ],
[AC_DEFINE(HAVE_LIBMOUNT, 1, [Define if libmount is available]) have_libmount=yes], have_libmount=no)
if test "x$have_libmount" = xno; then
AC_MSG_ERROR([*** libmount support required but libraries not found])

28
src/core/main.c
View File

@ -1113,33 +1113,6 @@ static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
return 0;
}
static void test_mtab(void) {
static const char ok[] =
"/proc/self/mounts\0"
"/proc/mounts\0"
"../proc/self/mounts\0"
"../proc/mounts\0";
_cleanup_free_ char *p = NULL;
int r;
/* Check that /etc/mtab is a symlink to the right place or
* non-existing. But certainly not a file, or a symlink to
* some weird place... */
r = readlink_malloc("/etc/mtab", &p);
if (r == -ENOENT)
return;
if (r >= 0 && nulstr_contains(ok, p))
return;
log_error("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
"This is not supported anymore. "
"Please replace /etc/mtab with a symlink to /proc/self/mounts.");
freeze_or_reboot();
}
static void test_usr(void) {
/* Check that /usr is not a separate fs */
@ -1614,7 +1587,6 @@ int main(int argc, char *argv[]) {
machine_id_setup(NULL);
loopback_setup();
test_mtab();
test_usr();
}