chiark / gitweb /
journald: be more careful when we try to flush the runtime journal to disk and the...
[elogind.git] / src / journal / journald-server.c
index be84323a6c0623446d68d404688330ed1ec4016c..88163c01167a19407bb38098ec28b768b3fb6773 100644 (file)
 #include <systemd/sd-messages.h>
 #include <systemd/sd-daemon.h>
 
-#ifdef HAVE_LOGIND
-#include <systemd/sd-login.h>
-#endif
-
 #include "fileio.h"
 #include "mkdir.h"
 #include "hashmap.h"
@@ -95,13 +91,13 @@ DEFINE_CONFIG_PARSE_ENUM(config_parse_split_mode, split_mode, SplitMode, "Failed
 
 static uint64_t available_space(Server *s) {
         char ids[33];
-        char _cleanup_free_ *p = NULL;
+        _cleanup_free_ char *p = NULL;
         const char *f;
         sd_id128_t machine;
         struct statvfs ss;
         uint64_t sum = 0, avail = 0, ss_avail = 0;
         int r;
-        DIR _cleanup_closedir_ *d = NULL;
+        _cleanup_closedir_ DIR *d = NULL;
         usec_t ts;
         JournalMetrics *m;
 
@@ -420,36 +416,6 @@ void server_vacuum(Server *s) {
         s->cached_available_space_timestamp = 0;
 }
 
-static char *shortened_cgroup_path(pid_t pid) {
-        int r;
-        char _cleanup_free_ *process_path = NULL, *init_path = NULL;
-        char *path;
-
-        assert(pid > 0);
-
-        r = cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, pid, &process_path);
-        if (r < 0)
-                return NULL;
-
-        r = cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, 1, &init_path);
-        if (r < 0)
-                return NULL;
-
-        if (endswith(init_path, "/system"))
-                init_path[strlen(init_path) - 7] = 0;
-        else if (streq(init_path, "/"))
-                init_path[0] = 0;
-
-        if (startswith(process_path, init_path)) {
-                path = strdup(process_path + strlen(init_path));
-        } else {
-                path = process_path;
-                process_path = NULL;
-        }
-
-        return path;
-}
-
 bool shall_try_append_again(JournalFile *f, int r) {
 
         /* -E2BIG            Hit configured limit
@@ -535,26 +501,26 @@ static void dispatch_message_real(
                 const char *label, size_t label_len,
                 const char *unit_id) {
 
-        char pid[sizeof("_PID=") + DECIMAL_STR_MAX(ucred->pid)],
-                uid[sizeof("_UID=") + DECIMAL_STR_MAX(ucred->uid)],
-                gid[sizeof("_GID=") + DECIMAL_STR_MAX(ucred->gid)],
+        char pid[sizeof("_PID=") + DECIMAL_STR_MAX(pid_t)],
+                uid[sizeof("_UID=") + DECIMAL_STR_MAX(uid_t)],
+                gid[sizeof("_GID=") + DECIMAL_STR_MAX(gid_t)],
+                owner_uid[sizeof("_SYSTEMD_OWNER_UID=") + DECIMAL_STR_MAX(uid_t)],
                 source_time[sizeof("_SOURCE_REALTIME_TIMESTAMP=") + DECIMAL_STR_MAX(usec_t)],
                 boot_id[sizeof("_BOOT_ID=") + 32] = "_BOOT_ID=",
                 machine_id[sizeof("_MACHINE_ID=") + 32] = "_MACHINE_ID=";
-
-        char _cleanup_free_ *comm = NULL, *cmdline = NULL, *hostname = NULL,
-                *exe = NULL, *cgroup = NULL, *session = NULL,
-                *owner_uid = NULL, *unit = NULL, *selinux_context = NULL;
-
-#ifdef HAVE_AUDIT
-        char _cleanup_free_ *audit_session = NULL, *audit_loginuid = NULL;
-#endif
-
+        char *comm, *exe, *cmdline, *cgroup, *session, *unit, *hostname;
         sd_id128_t id;
         int r;
-        char *t;
+        char *t, *c;
         uid_t realuid = 0, owner = 0, journal_uid;
         bool owner_valid = false;
+#ifdef HAVE_AUDIT
+        char audit_session[sizeof("_AUDIT_SESSION=") + DECIMAL_STR_MAX(uint32_t)],
+                audit_loginuid[sizeof("_AUDIT_LOGINUID=") + DECIMAL_STR_MAX(uid_t)];
+
+        uint32_t audit;
+        uid_t loginuid;
+#endif
 
         assert(s);
         assert(iovec);
@@ -562,129 +528,112 @@ static void dispatch_message_real(
         assert(n + N_IOVEC_META_FIELDS <= m);
 
         if (ucred) {
-#ifdef HAVE_AUDIT
-                uint32_t audit;
-                uid_t loginuid;
-#endif
-
                 realuid = ucred->uid;
 
-                snprintf(pid, sizeof(pid) - 1, "_PID=%lu", (unsigned long) ucred->pid);
-                char_array_0(pid);
+                sprintf(pid, "_PID=%lu", (unsigned long) ucred->pid);
                 IOVEC_SET_STRING(iovec[n++], pid);
 
-                snprintf(uid, sizeof(uid) - 1, "_UID=%lu", (unsigned long) ucred->uid);
-                char_array_0(uid);
+                sprintf(uid, "_UID=%lu", (unsigned long) ucred->uid);
                 IOVEC_SET_STRING(iovec[n++], uid);
 
-                snprintf(gid, sizeof(gid) - 1, "_GID=%lu", (unsigned long) ucred->gid);
-                char_array_0(gid);
+                sprintf(gid, "_GID=%lu", (unsigned long) ucred->gid);
                 IOVEC_SET_STRING(iovec[n++], gid);
 
                 r = get_process_comm(ucred->pid, &t);
                 if (r >= 0) {
-                        comm = strappend("_COMM=", t);
+                        comm = strappenda("_COMM=", t);
                         free(t);
-
-                        if (comm)
-                                IOVEC_SET_STRING(iovec[n++], comm);
+                        IOVEC_SET_STRING(iovec[n++], comm);
                 }
 
                 r = get_process_exe(ucred->pid, &t);
                 if (r >= 0) {
-                        exe = strappend("_EXE=", t);
+                        exe = strappenda("_EXE=", t);
                         free(t);
-
-                        if (exe)
-                                IOVEC_SET_STRING(iovec[n++], exe);
+                        IOVEC_SET_STRING(iovec[n++], exe);
                 }
 
                 r = get_process_cmdline(ucred->pid, 0, false, &t);
                 if (r >= 0) {
-                        cmdline = strappend("_CMDLINE=", t);
+                        cmdline = strappenda("_CMDLINE=", t);
                         free(t);
-
-                        if (cmdline)
-                                IOVEC_SET_STRING(iovec[n++], cmdline);
+                        IOVEC_SET_STRING(iovec[n++], cmdline);
                 }
 
 #ifdef HAVE_AUDIT
                 r = audit_session_from_pid(ucred->pid, &audit);
-                if (r >= 0)
-                        if (asprintf(&audit_session, "_AUDIT_SESSION=%lu", (unsigned long) audit) >= 0)
-                                IOVEC_SET_STRING(iovec[n++], audit_session);
+                if (r >= 0) {
+                        sprintf(audit_session, "_AUDIT_SESSION=%lu", (unsigned long) audit);
+                        IOVEC_SET_STRING(iovec[n++], audit_session);
+                }
 
                 r = audit_loginuid_from_pid(ucred->pid, &loginuid);
-                if (r >= 0)
-                        if (asprintf(&audit_loginuid, "_AUDIT_LOGINUID=%lu", (unsigned long) loginuid) >= 0)
-                                IOVEC_SET_STRING(iovec[n++], audit_loginuid);
-#endif
-
-                t = shortened_cgroup_path(ucred->pid);
-                if (t) {
-                        cgroup = strappend("_SYSTEMD_CGROUP=", t);
-                        free(t);
-
-                        if (cgroup)
-                                IOVEC_SET_STRING(iovec[n++], cgroup);
+                if (r >= 0) {
+                        sprintf(audit_loginuid, "_AUDIT_LOGINUID=%lu", (unsigned long) loginuid);
+                        IOVEC_SET_STRING(iovec[n++], audit_loginuid);
                 }
+#endif
 
-#ifdef HAVE_LOGIND
-                if (sd_pid_get_session(ucred->pid, &t) >= 0) {
-                        session = strappend("_SYSTEMD_SESSION=", t);
-                        free(t);
+                r = cg_pid_get_path_shifted(ucred->pid, NULL, &c);
+                if (r >= 0) {
+                        cgroup = strappenda("_SYSTEMD_CGROUP=", c);
+                        IOVEC_SET_STRING(iovec[n++], cgroup);
 
-                        if (session)
+                        r = cg_path_get_session(c, &t);
+                        if (r >= 0) {
+                                session = strappenda("_SYSTEMD_SESSION=", t);
+                                free(t);
                                 IOVEC_SET_STRING(iovec[n++], session);
-                }
+                        }
+
+                        if (cg_path_get_owner_uid(c, &owner) >= 0) {
+                                owner_valid = true;
 
-                if (sd_pid_get_owner_uid(ucred->pid, &owner) >= 0) {
-                        owner_valid = true;
-                        if (asprintf(&owner_uid, "_SYSTEMD_OWNER_UID=%lu", (unsigned long) owner) >= 0)
+                                sprintf(owner_uid, "_SYSTEMD_OWNER_UID=%lu", (unsigned long) owner);
                                 IOVEC_SET_STRING(iovec[n++], owner_uid);
-                }
-#endif
+                        }
 
-                if (cg_pid_get_unit(ucred->pid, &t) >= 0) {
-                        unit = strappend("_SYSTEMD_UNIT=", t);
-                        free(t);
-                } else if (cg_pid_get_user_unit(ucred->pid, &t) >= 0) {
-                        unit = strappend("_SYSTEMD_USER_UNIT=", t);
-                        free(t);
-                } else if (unit_id) {
-                        if (session)
-                                unit = strappend("_SYSTEMD_USER_UNIT=", unit_id);
-                        else
-                                unit = strappend("_SYSTEMD_UNIT=", unit_id);
+                        if (cg_path_get_unit(c, &t) >= 0) {
+                                unit = strappenda("_SYSTEMD_UNIT=", t);
+                                free(t);
+                        } else if (cg_path_get_user_unit(c, &t) >= 0) {
+                                unit = strappenda("_SYSTEMD_USER_UNIT=", t);
+                                free(t);
+                        } else if (unit_id) {
+                                if (session)
+                                        unit = strappenda("_SYSTEMD_USER_UNIT=", unit_id);
+                                else
+                                        unit = strappenda("_SYSTEMD_UNIT=", unit_id);
+                        } else
+                                unit = NULL;
+
+                        if (unit)
+                                IOVEC_SET_STRING(iovec[n++], unit);
+
+                        free(c);
                 }
 
-                if (unit)
-                        IOVEC_SET_STRING(iovec[n++], unit);
-
 #ifdef HAVE_SELINUX
                 if (label) {
-                        selinux_context = malloc(sizeof("_SELINUX_CONTEXT=") + label_len);
-                        if (selinux_context) {
-                                *((char*) mempcpy(stpcpy(selinux_context, "_SELINUX_CONTEXT="), label, label_len)) = 0;
-                                IOVEC_SET_STRING(iovec[n++], selinux_context);
-                        }
+                        char *selinux_context = alloca(sizeof("_SELINUX_CONTEXT=") + label_len);
+
+                        *((char*) mempcpy(stpcpy(selinux_context, "_SELINUX_CONTEXT="), label, label_len)) = 0;
+                        IOVEC_SET_STRING(iovec[n++], selinux_context);
                 } else {
                         security_context_t con;
 
                         if (getpidcon(ucred->pid, &con) >= 0) {
-                                selinux_context = strappend("_SELINUX_CONTEXT=", con);
-                                if (selinux_context)
-                                        IOVEC_SET_STRING(iovec[n++], selinux_context);
+                                char *selinux_context = strappenda("_SELINUX_CONTEXT=", con);
+
                                 freecon(con);
+                                IOVEC_SET_STRING(iovec[n++], selinux_context);
                         }
                 }
 #endif
         }
 
         if (tv) {
-                snprintf(source_time, sizeof(source_time) - 1, "_SOURCE_REALTIME_TIMESTAMP=%llu",
-                         (unsigned long long) timeval_load(tv));
-                char_array_0(source_time);
+                sprintf(source_time, "_SOURCE_REALTIME_TIMESTAMP=%llu", (unsigned long long) timeval_load(tv));
                 IOVEC_SET_STRING(iovec[n++], source_time);
         }
 
@@ -705,10 +654,9 @@ static void dispatch_message_real(
 
         t = gethostname_malloc();
         if (t) {
-                hostname = strappend("_HOSTNAME=", t);
+                hostname = strappenda("_HOSTNAME=", t);
                 free(t);
-                if (hostname)
-                        IOVEC_SET_STRING(iovec[n++], hostname);
+                IOVEC_SET_STRING(iovec[n++], hostname);
         }
 
         assert(n <= m);
@@ -773,8 +721,8 @@ void server_dispatch_message(
                 const char *unit_id,
                 int priority) {
 
-        int rl;
-        char _cleanup_free_ *path = NULL;
+        int rl, r;
+        _cleanup_free_ char *path = NULL;
         char *c;
 
         assert(s);
@@ -789,8 +737,8 @@ void server_dispatch_message(
         if (!ucred)
                 goto finish;
 
-        path = shortened_cgroup_path(ucred->pid);
-        if (!path)
+        r = cg_pid_get_path_shifted(ucred->pid, NULL, &path);
+        if (r < 0)
                 goto finish;
 
         /* example: /user/lennart/3/foobar
@@ -990,6 +938,12 @@ int server_flush_to_var(Server *s) {
                 server_rotate(s);
                 server_vacuum(s);
 
+                if (!s->system_journal) {
+                        log_notice("Didn't flush runtime journal since rotation of system journal wasn't successful.");
+                        r = -EIO;
+                        goto finish;
+                }
+
                 log_debug("Retrying write.");
                 r = journal_file_copy_entry(f, s->system_journal, o, f->current_offset, NULL, NULL, NULL);
                 if (r < 0) {
@@ -1276,7 +1230,7 @@ static int open_signalfd(Server *s) {
 }
 
 static int server_parse_proc_cmdline(Server *s) {
-        char _cleanup_free_ *line = NULL;
+        _cleanup_free_ char *line = NULL;
         char *w, *state;
         int r;
         size_t l;
@@ -1291,7 +1245,7 @@ static int server_parse_proc_cmdline(Server *s) {
         }
 
         FOREACH_WORD_QUOTED(w, l, line, state) {
-                char _cleanup_free_ *word;
+                _cleanup_free_ char *word;
 
                 word = strndup(w, l);
                 if (!word)
@@ -1323,8 +1277,8 @@ static int server_parse_proc_cmdline(Server *s) {
 }
 
 static int server_parse_config_file(Server *s) {
-        static const char *fn = "/etc/systemd/journald.conf";
-        FILE _cleanup_fclose_ *f = NULL;
+        static const char fn[] = "/etc/systemd/journald.conf";
+        _cleanup_fclose_ FILE *f = NULL;
         int r;
 
         assert(s);
@@ -1338,8 +1292,8 @@ static int server_parse_config_file(Server *s) {
                 return -errno;
         }
 
-        r = config_parse(fn, f, "Journal\0", config_item_perf_lookup,
-                         (void*) journald_gperf_lookup, false, s);
+        r = config_parse(NULL, fn, f, "Journal\0", config_item_perf_lookup,
+                         (void*) journald_gperf_lookup, false, false, s);
         if (r < 0)
                 log_warning("Failed to parse configuration file: %s", strerror(-r));