diff options
| -rw-r--r-- | man/sd_booted.xml | 9 | ||||
| -rw-r--r-- | src/core/mount-setup.c | 6 | ||||
| -rw-r--r-- | src/libsystemd-daemon/sd-daemon.c | 15 |
3 files changed, 15 insertions, 15 deletions
diff --git a/man/sd_booted.xml b/man/sd_booted.xml index 34f2cbfbc..ce5a34dc8 100644 --- a/man/sd_booted.xml +++ b/man/sd_booted.xml @@ -85,11 +85,10 @@ implementation.</para> <para>Internally, this function checks whether the - <filename>/sys/fs/cgroup/systemd</filename> virtual file - system is mounted, by comparing the st_dev value of - the <function>stat()</function> data of - <filename>/sys/fs/cgroup</filename> and - <filename>/sys/fs/cgroup/systemd</filename>.</para> + directory <filename>/run/systemd/system/</filename> + exists. A simple check like this can also be + implemented trivially in shell or any other + language.</para> <para>For details about the algorithm check the liberally licensed reference implementation sources: diff --git a/src/core/mount-setup.c b/src/core/mount-setup.c index 42cdc6dc5..ce10be944 100644 --- a/src/core/mount-setup.c +++ b/src/core/mount-setup.c @@ -440,7 +440,11 @@ int mount_setup(bool loaded_policy) { if (mount(NULL, "/", NULL, MS_REC|MS_SHARED, NULL) < 0) log_warning("Failed to set up the root directory for shared mount propagation: %m"); - /* Create a few directories we always want around */ + /* Create a few directories we always want around, Note that + * sd_booted() checks for /run/systemd/system, so this mkdir + * really needs to stay for good, otherwise software that + * copied sd-daemon.c into their sources will misdetect + * systemd. */ mkdir_label("/run/systemd", 0755); mkdir_label("/run/systemd/system", 0755); diff --git a/src/libsystemd-daemon/sd-daemon.c b/src/libsystemd-daemon/sd-daemon.c index 5b92e2e3d..79d8ca370 100644 --- a/src/libsystemd-daemon/sd-daemon.c +++ b/src/libsystemd-daemon/sd-daemon.c @@ -519,18 +519,15 @@ _sd_export_ int sd_booted(void) { #if defined(DISABLE_SYSTEMD) || !defined(__linux__) return 0; #else + struct stat st; - struct stat a, b; + /* We test whether the runtime unit file directory has been + * created. This takes place in mount-setup.c, so is + * guaranteed to happen very early during boot. */ - /* We simply test whether the systemd cgroup hierarchy is - * mounted */ - - if (lstat("/sys/fs/cgroup", &a) < 0) - return 0; - - if (lstat("/sys/fs/cgroup/systemd", &b) < 0) + if (lstat("/run/systemd/system/", &st) < 0) return 0; - return a.st_dev != b.st_dev; + return !!S_ISDIR(st.st_mode); #endif } |