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logind: don't apply RemoveIPC= to system users

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We shouldn't destroy IPC objects of system users on logout.

http://lists.freedesktop.org/archives/systemd-devel/2014-April/018373.html

This introduces SYSTEM_UID_MAX defined to the maximum UID of system
users. This value is determined compile-time, either as configure switch
or from /etc/login.defs. (We don't read that file at runtime, since this
is really a choice for a system builder, not the end user.)

While we are at it we then also update journald to use SYSTEM_UID_MAX
when we decide whether to split out log data for a specific client.
This commit is contained in:
Lennart Poettering
2014-05-21 09:31:22 +09:00
parent f5c0c00f40
commit f7dc3ab9f4
5 changed files with 30 additions and 4 deletions
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configure.ac
+22
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@@ -853,6 +853,26 @@ AC_ARG_WITH(time-epoch,
AC_DEFINE_UNQUOTED(TIME_EPOCH, [$TIME_EPOCH], [Time Epoch])
# ------------------------------------------------------------------------------
AC_ARG_WITH(system-uid-max,
AS_HELP_STRING([--with-system-uid-max=UID]
[Maximum UID for system users]),
[SYSTEM_UID_MAX="$withval"],
[SYSTEM_UID_MAX="`awk 'BEGIN { uid=999 } /^\s*SYS_UID_MAX\s+/ { uid=$2 } END { print uid }' /etc/login.defs 2>/dev/null || echo 999`"])
AC_DEFINE_UNQUOTED(SYSTEM_UID_MAX, [$SYSTEM_UID_MAX], [Maximum System UID])
AC_SUBST(SYSTEM_UID_MAX)
# ------------------------------------------------------------------------------
AC_ARG_WITH(system-gid-max,
AS_HELP_STRING([--with-system-gid-max=GID]
[Maximum GID for system groups]),
[SYSTEM_GID_MAX="$withval"],
[SYSTEM_GID_MAX="`awk 'BEGIN { gid=999 } /^\s*SYS_GID_MAX\s+/ { gid=$2 } END { print gid }' /etc/login.defs 2>/dev/null || echo 999`"])
AC_DEFINE_UNQUOTED(SYSTEM_GID_MAX, [$SYSTEM_GID_MAX], [Maximum System GID])
AC_SUBST(SYSTEM_GID_MAX)
# ------------------------------------------------------------------------------
have_localed=no
AC_ARG_ENABLE(localed, AS_HELP_STRING([--disable-localed], [disable locale daemon]))
@@ -1256,6 +1276,8 @@ AC_MSG_RESULT([
Extra start script: ${RC_LOCAL_SCRIPT_PATH_START}
Extra stop script: ${RC_LOCAL_SCRIPT_PATH_STOP}
Debug shell: ${SUSHELL} @ ${DEBUGTTY}
Maximum System UID: ${SYSTEM_UID_MAX}
Maximum System GID: ${SYSTEM_GID_MAX}
CFLAGS: ${OUR_CFLAGS} ${CFLAGS}
CPPFLAGS: ${OUR_CPPFLAGS} ${CPPFLAGS}