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authorLennart Poettering <lennart@poettering.net>2012-08-22 04:45:17 +0200
committerLennart Poettering <lennart@poettering.net>2012-08-22 04:45:17 +0200
commit99add6fd0b8f4307ed79256e25f38da318e795c4 (patch)
tree734da124ebd089aff5ee3adbc6bdb4c1b7e990a6
parentd2bd7630d7ebbf9a86cca96e39d56efd4558ead4 (diff)
journalctl: complain if unprivileged users attempt to access the journal and persistant logging is off
-rw-r--r--TODO10
-rw-r--r--src/journal/journalctl.c14
-rw-r--r--src/journal/journald.c10
3 files changed, 20 insertions, 14 deletions
diff --git a/TODO b/TODO
index 28141ec68c..ee90aee739 100644
--- a/TODO
+++ b/TODO
@@ -61,14 +61,10 @@ Features:
* testing tool for socket activation: some binary that listens on a socket and passes it on using the usual socket activation protocol to some server.
-* journald: add symlinks and device names to kernel messages
-
* maybe make systemd-detect-virt suid? or use fscaps?
* consider using __secure_getenv() instead of getenv() in libs
-* journald: automatic rekeying with no log messages doesn't appear to work
-
* man: document in ExecStart= explicitly that we don't take shell command lines, only executable names with arguments
* shutdown: don't read-only mount anything when running in container
@@ -135,14 +131,10 @@ Features:
* switch-root: sockets need relabelling
-* segfault in journalctl during /var migration
-
* systemd-analyze post-boot is broken for initrd
* man: clarify that time-sync.target is not only sysv compat but also useful otherwise. Same for similar targets
-* journalctl should complain if run with uid != 0 and no persistent logs exist
-
* .device aliases need to be implemented with the "following" logic, probably.
* refuse taking lower-case variable names in sd_journal_send() and friends.
@@ -188,7 +180,7 @@ Features:
* systemctl: when stopping a service which has triggres and warning about it actually check the TriggeredBy= deps fields
-* journal: hook up with EFI firmware log, new kmsg logic
+* journal: hook up with EFI firmware log
* handle C-A-Del in logind, like the power/suspend buttons?
diff --git a/src/journal/journalctl.c b/src/journal/journalctl.c
index bee26fd769..6aff1f1ba3 100644
--- a/src/journal/journalctl.c
+++ b/src/journal/journalctl.c
@@ -747,8 +747,20 @@ int main(int argc, char *argv[]) {
}
#ifdef HAVE_ACL
+ if (access("/var/log/journal", F_OK) < 0 && geteuid() != 0 && in_group("adm") <= 0) {
+ log_error("Unprivileged users can't see messages unless persistent log storage is enabled. Users in the group 'adm' can always see messages.");
+ r = -EACCES;
+ goto finish;
+ }
+
if (!arg_quiet && geteuid() != 0 && in_group("adm") <= 0)
- log_warning("Showing user generated messages only. Users in the group 'adm' can see all messages. Pass -q to turn this message off.");
+ log_warning("Showing user generated messages only. Users in the group 'adm' can see all messages. Pass -q to turn this notice off.");
+#else
+ if (geteuid() != 0 && in_group("adm") <= 0) {
+ log_error("No access to messages. Only users in the group 'adm' can see messages.");
+ r = -EACCES;
+ goto finish;
+ }
#endif
r = add_this_boot(j);
diff --git a/src/journal/journald.c b/src/journal/journald.c
index 476d682fda..a1deceabdf 100644
--- a/src/journal/journald.c
+++ b/src/journal/journald.c
@@ -360,7 +360,8 @@ static void server_vacuum(Server *s) {
sd_id128_to_string(machine, ids);
if (s->system_journal) {
- if (asprintf(&p, "/var/log/journal/%s", ids) < 0) {
+ p = strappend("/var/log/journal/", ids);
+ if (!p) {
log_oom();
return;
}
@@ -372,7 +373,8 @@ static void server_vacuum(Server *s) {
}
if (s->runtime_journal) {
- if (asprintf(&p, "/run/log/journal/%s", ids) < 0) {
+ p = strappend("/run/log/journal/", ids);
+ if (!p) {
log_oom();
return;
}
@@ -1394,7 +1396,7 @@ static int server_init(Server *s) {
return 0;
}
-static void maybe_append_tags(Server *s) {
+static void server_maybe_append_tags(Server *s) {
#ifdef HAVE_GCRYPT
JournalFile *f;
Iterator i;
@@ -1539,7 +1541,7 @@ int main(int argc, char *argv[]) {
break;
}
- maybe_append_tags(&server);
+ server_maybe_append_tags(&server);
}
log_debug("systemd-journald stopped as pid %lu", (unsigned long) getpid());