X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fmain.c;h=71e684b1bda9f34cb5889c41bc30ff7a683ea3eb;hp=88ba09d43e51a1355d3cbe00620e7bc22ae19dd1;hb=260ab287953153a8b4ae13133adfdfc2b3514a46;hpb=b9080b03a98252ccccb332d0c892403b8b841916

diff --git a/src/main.c b/src/main.c
index 88ba09d43..71e684b1b 100644
--- a/src/main.c
+++ b/src/main.c
@@ -31,6 +31,7 @@
 #include <signal.h>
 #include <sys/wait.h>
 #include <fcntl.h>
+#include <sys/prctl.h>
 
 #include "manager.h"
 #include "log.h"
@@ -39,6 +40,7 @@
 #include "loopback-setup.h"
 #include "kmod-setup.h"
 #include "locale-setup.h"
+#include "selinux-setup.h"
 #include "load-fragment.h"
 #include "fdset.h"
 #include "special.h"
@@ -180,20 +182,6 @@ static void install_crash_handler(void) {
         sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
 }
 
-static int make_null_stdio(void) {
-        int null_fd, r;
-
-        if ((null_fd = open("/dev/null", O_RDWR|O_NOCTTY)) < 0) {
-                log_error("Failed to open /dev/null: %m");
-                return -errno;
-        }
-
-        if ((r = make_stdio(null_fd)) < 0)
-                log_warning("Failed to dup2() device: %s", strerror(-r));
-
-        return r;
-}
-
 static int console_setup(bool do_reset) {
         int tty_fd, r;
 
@@ -333,7 +321,7 @@ static int parse_proc_cmdline_word(const char *word) {
 #ifdef HAVE_SYSV_COMPAT
                          "systemd.sysv_console=0|1                 Connect output of SysV scripts to console\n"
 #endif
-                         "systemd.log_target=console|kmsg|syslog|syslog-org-kmsg|null\n"
+                         "systemd.log_target=console|kmsg|syslog|syslog-or-kmsg|null\n"
                          "                                         Log target\n"
                          "systemd.log_level=LEVEL                  Log level\n"
                          "systemd.log_color=0|1                    Highlight important log messages\n"
@@ -884,12 +872,50 @@ fail:
         return r;
 }
 
+static struct dual_timestamp* parse_initrd_timestamp(struct dual_timestamp *t) {
+        const char *e;
+        unsigned long long a, b;
+
+        assert(t);
+
+        if (!(e = getenv("RD_TIMESTAMP")))
+                return NULL;
+
+        if (sscanf(e, "%llu %llu", &a, &b) != 2)
+                return NULL;
+
+        t->realtime = (usec_t) a;
+        t->monotonic = (usec_t) b;
+
+        return t;
+}
+
+static void test_mtab(void) {
+        char *p;
+
+        if (readlink_malloc("/etc/mtab", &p) >= 0) {
+                bool b;
+
+                b = streq(p, "/proc/self/mounts");
+                free(p);
+
+                if (b)
+                        return;
+        }
+
+        log_error("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
+                  "This is not supported anymore. "
+                  "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
+}
+
 int main(int argc, char *argv[]) {
         Manager *m = NULL;
         int r, retval = EXIT_FAILURE;
         FDSet *fds = NULL;
         bool reexecute = false;
         const char *shutdown_verb = NULL;
+        dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
+        char systemd[] = "systemd";
 
         if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
                 /* This is compatbility support for SysV, where
@@ -901,6 +927,14 @@ int main(int argc, char *argv[]) {
                 return 1;
         }
 
+        /* If we get started via the /sbin/init symlink then we are
+           called 'init'. After a subsequent reexecution we are then
+           called 'systemd'. That is confusing, hence let's call us
+           systemd right-away. */
+
+        program_invocation_short_name = systemd;
+        prctl(PR_SET_NAME, systemd);
+
         log_show_color(isatty(STDERR_FILENO) > 0);
         log_show_location(false);
         log_set_max_level(LOG_INFO);
@@ -909,6 +943,11 @@ int main(int argc, char *argv[]) {
                 arg_running_as = MANAGER_SYSTEM;
                 log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
 
+                /* This might actually not return, but cause a
+                 * reexecution */
+                if (selinux_setup(argv) < 0)
+                        goto finish;
+
                 if (label_init() < 0)
                         goto finish;
         } else {
@@ -973,6 +1012,17 @@ int main(int argc, char *argv[]) {
                "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
                arg_running_as == MANAGER_SYSTEM);
 
+        if (arg_running_as == MANAGER_SYSTEM) {
+                /* Parse the data passed to us by the initrd and unset it */
+                parse_initrd_timestamp(&initrd_timestamp);
+                filter_environ("RD_");
+
+                /* Unset some environment variables passed in from the
+                 * kernel that don't really make sense for us. */
+                unsetenv("HOME");
+                unsetenv("TERM");
+        }
+
         /* Move out of the way, so that we won't block unmounts */
         assert_se(chdir("/")  == 0);
 
@@ -1016,6 +1066,8 @@ int main(int argc, char *argv[]) {
                 loopback_setup();
 
                 mkdir_p("/dev/.systemd/ask-password/", 0755);
+
+                test_mtab();
         }
 
         if ((r = manager_new(arg_running_as, &m)) < 0) {
@@ -1031,6 +1083,9 @@ int main(int argc, char *argv[]) {
         m->mount_auto = arg_mount_auto;
         m->swap_auto = arg_swap_auto;
 
+        if (dual_timestamp_is_set(&initrd_timestamp))
+                m->initrd_timestamp = initrd_timestamp;
+
         if (arg_console)
                 manager_set_console(m, arg_console);