chiark / gitweb /
systemctl: limit logs in status to current boot
[elogind.git] / src / shared / logs-show.c
index 36cce73550f45b4dd18a00ad42a299ccae108934..79a977c156e6c675fbc948d2860169af8d40a2ad 100644 (file)
 #include "util.h"
 #include "utf8.h"
 #include "hashmap.h"
+#include "journal-internal.h"
 
 #define PRINT_THRESHOLD 128
 #define JSON_THRESHOLD 4096
 
+static int print_catalog(FILE *f, sd_journal *j) {
+        int r;
+        _cleanup_free_ char *t = NULL, *z = NULL;
+
+
+        r = sd_journal_get_catalog(j, &t);
+        if (r < 0)
+                return r;
+
+        z = strreplace(strstrip(t), "\n", "\n-- ");
+        if (!z)
+                return log_oom();
+
+        fputs("-- ", f);
+        fputs(z, f);
+        fputc('\n', f);
+
+        return 0;
+}
+
 static int parse_field(const void *data, size_t length, const char *field, char **target, size_t *target_size) {
         size_t fl, nl;
         void *buf;
@@ -71,7 +92,7 @@ static bool shall_print(const char *p, size_t l, OutputFlags flags) {
         if (flags & OUTPUT_SHOW_ALL)
                 return true;
 
-        if (l > PRINT_THRESHOLD)
+        if (l >= PRINT_THRESHOLD)
                 return false;
 
         if (!utf8_is_printable_n(p, l))
@@ -99,6 +120,8 @@ static int output_short(
         assert(f);
         assert(j);
 
+        sd_journal_set_data_threshold(j, flags & OUTPUT_SHOW_ALL ? 0 : PRINT_THRESHOLD);
+
         SD_JOURNAL_FOREACH_DATA(j, data, length) {
 
                 r = parse_field(data, length, "PRIORITY=", &priority, &priority_len);
@@ -157,6 +180,9 @@ static int output_short(
         if (!message)
                 return 0;
 
+        if (!(flags & OUTPUT_SHOW_ALL))
+                strip_tab_ansi(&message, &message_len);
+
         if (priority_len == 1 && *priority >= '0' && *priority <= '7')
                 p = *priority - '0';
 
@@ -252,7 +278,7 @@ static int output_short(
         } else if ((flags & OUTPUT_FULL_WIDTH) || (message_len + n + 1 < n_columns))
                 fprintf(f, ": %s%.*s%s\n", color_on, (int) message_len, message, color_off);
         else if (n < n_columns && n_columns - n - 2 >= 3) {
-                char *e;
+                _cleanup_free_ char *e;
 
                 e = ellipsize_mem(message, message_len, n_columns - n - 2, 90);
 
@@ -260,11 +286,12 @@ static int output_short(
                         fprintf(f, ": %s%.*s%s\n", color_on, (int) message_len, message, color_off);
                 else
                         fprintf(f, ": %s%s%s\n", color_on, e, color_off);
-
-                free(e);
         } else
                 fputs("\n", f);
 
+        if (flags & OUTPUT_CATALOG)
+                print_catalog(f, j);
+
         return 0;
 }
 
@@ -277,7 +304,7 @@ static int output_verbose(
 
         const void *data;
         size_t length;
-        char *cursor;
+        _cleanup_free_ char *cursor = NULL;
         uint64_t realtime;
         char ts[FORMAT_TIMESTAMP_MAX];
         int r;
@@ -285,6 +312,8 @@ static int output_verbose(
         assert(f);
         assert(j);
 
+        sd_journal_set_data_threshold(j, 0);
+
         r = sd_journal_get_realtime_usec(j, &realtime);
         if (r < 0) {
                 log_error("Failed to get realtime timestamp: %s", strerror(-r));
@@ -301,8 +330,6 @@ static int output_verbose(
                 format_timestamp(ts, sizeof(ts), realtime),
                 cursor);
 
-        free(cursor);
-
         SD_JOURNAL_FOREACH_DATA(j, data, length) {
                 if (!shall_print(data, length, flags)) {
                         const char *c;
@@ -322,6 +349,9 @@ static int output_verbose(
                         fprintf(f, "\t%.*s\n", (int) length, (const char*) data);
         }
 
+        if (flags & OUTPUT_CATALOG)
+                print_catalog(f, j);
+
         return 0;
 }
 
@@ -336,12 +366,14 @@ static int output_export(
         char sid[33];
         int r;
         usec_t realtime, monotonic;
-        char *cursor;
+        _cleanup_free_ char *cursor = NULL;
         const void *data;
         size_t length;
 
         assert(j);
 
+        sd_journal_set_data_threshold(j, 0);
+
         r = sd_journal_get_realtime_usec(j, &realtime);
         if (r < 0) {
                 log_error("Failed to get realtime timestamp: %s", strerror(-r));
@@ -370,8 +402,6 @@ static int output_export(
                 (unsigned long long) monotonic,
                 sd_id128_to_string(boot_id, sid));
 
-        free(cursor);
-
         SD_JOURNAL_FOREACH_DATA(j, data, length) {
 
                 /* We already printed the boot id, from the data in
@@ -415,7 +445,7 @@ void json_escape(
         assert(f);
         assert(p);
 
-        if (!(flags & OUTPUT_SHOW_ALL) && l > JSON_THRESHOLD)
+        if (!(flags & OUTPUT_SHOW_ALL) && l >= JSON_THRESHOLD)
 
                 fputs("null", f);
 
@@ -465,17 +495,19 @@ static int output_json(
                 OutputFlags flags) {
 
         uint64_t realtime, monotonic;
-        char *cursor, *k;
+        _cleanup_free_ char *cursor = NULL;
         const void *data;
         size_t length;
         sd_id128_t boot_id;
-        char sid[33];
+        char sid[33], *k;
         int r;
         Hashmap *h = NULL;
         bool done, separator;
 
         assert(j);
 
+        sd_journal_set_data_threshold(j, flags & OUTPUT_SHOW_ALL ? 0 : JSON_THRESHOLD);
+
         r = sd_journal_get_realtime_usec(j, &realtime);
         if (r < 0) {
                 log_error("Failed to get realtime timestamp: %s", strerror(-r));
@@ -519,7 +551,6 @@ static int output_json(
                         (unsigned long long) monotonic,
                         sd_id128_to_string(boot_id, sid));
         }
-        free(cursor);
 
         h = hashmap_new(string_hash_func, string_compare_func);
         if (!h)
@@ -688,6 +719,8 @@ static int output_cat(
         assert(j);
         assert(f);
 
+        sd_journal_set_data_threshold(j, 0);
+
         r = sd_journal_get_data(j, "MESSAGE", &data, &l);
         if (r < 0) {
                 /* An entry without MESSAGE=? */
@@ -742,72 +775,22 @@ int output_journal(
         return ret;
 }
 
-int show_journal_by_unit(
-                FILE *f,
-                const char *unit,
-                OutputMode mode,
-                unsigned n_columns,
-                usec_t not_before,
-                unsigned how_many,
-                OutputFlags flags) {
+static int show_journal(FILE *f,
+                        sd_journal *j,
+                        OutputMode mode,
+                        unsigned n_columns,
+                        usec_t not_before,
+                        unsigned how_many,
+                        OutputFlags flags) {
 
-        _cleanup_free_ char *m1 = NULL, *m2 = NULL, *m3 = NULL;
-        sd_journal *j = NULL;
         int r;
         unsigned line = 0;
         bool need_seek = false;
         int warn_cutoff = flags & OUTPUT_WARN_CUTOFF;
 
+        assert(j);
         assert(mode >= 0);
         assert(mode < _OUTPUT_MODE_MAX);
-        assert(unit);
-
-        if (!endswith(unit, ".service") &&
-            !endswith(unit, ".socket") &&
-            !endswith(unit, ".mount") &&
-            !endswith(unit, ".swap"))
-                return 0;
-
-        if (how_many <= 0)
-                return 0;
-
-        if (asprintf(&m1, "_SYSTEMD_UNIT=%s", unit) < 0 ||
-            asprintf(&m2, "COREDUMP_UNIT=%s", unit) < 0 ||
-            asprintf(&m3, "UNIT=%s", unit) < 0) {
-                r = -ENOMEM;
-                goto finish;
-        }
-
-        r = sd_journal_open(&j, SD_JOURNAL_LOCAL_ONLY|SD_JOURNAL_SYSTEM_ONLY);
-        if (r < 0)
-                goto finish;
-
-        /* Look for messages from the service itself */
-        r = sd_journal_add_match(j, m1, 0);
-        if (r < 0)
-                goto finish;
-
-        /* Look for coredumps of the service */
-        r = sd_journal_add_disjunction(j);
-        if (r < 0)
-                goto finish;
-        r = sd_journal_add_match(j, "MESSAGE_ID=fc2e22bc6ee647b6b90729ab34a250b1", 0);
-        if (r < 0)
-                goto finish;
-        r = sd_journal_add_match(j, m2, 0);
-        if (r < 0)
-                goto finish;
-
-        /* Look for messages from PID 1 about this service */
-        r = sd_journal_add_disjunction(j);
-        if (r < 0)
-                goto finish;
-        r = sd_journal_add_match(j, "_PID=1", 0);
-        if (r < 0)
-                goto finish;
-        r = sd_journal_add_match(j, m3, 0);
-        if (r < 0)
-                goto finish;
 
         /* Seek to end */
         r = sd_journal_seek_tail(j);
@@ -884,12 +867,143 @@ int show_journal_by_unit(
         }
 
 finish:
-        if (j)
-                sd_journal_close(j);
+        return r;
+}
+
+int add_matches_for_unit(sd_journal *j, const char *unit) {
+        int r;
+        _cleanup_free_ char *m1 = NULL, *m2 = NULL, *m3 = NULL;
 
+        assert(j);
+        assert(unit);
+
+        if (asprintf(&m1, "_SYSTEMD_UNIT=%s", unit) < 0 ||
+            asprintf(&m2, "COREDUMP_UNIT=%s", unit) < 0 ||
+            asprintf(&m3, "UNIT=%s", unit) < 0)
+                return -ENOMEM;
+
+        (void)(
+            /* Look for messages from the service itself */
+            (r = sd_journal_add_match(j, m1, 0)) ||
+
+            /* Look for coredumps of the service */
+            (r = sd_journal_add_disjunction(j)) ||
+            (r = sd_journal_add_match(j,
+                        "MESSAGE_ID=fc2e22bc6ee647b6b90729ab34a250b1", 0)) ||
+            (r = sd_journal_add_match(j, m2, 0)) ||
+
+             /* Look for messages from PID 1 about this service */
+            (r = sd_journal_add_disjunction(j)) ||
+            (r = sd_journal_add_match(j, "_PID=1", 0)) ||
+            (r = sd_journal_add_match(j, m3, 0))
+        );
+        return r;
+}
+
+int add_matches_for_user_unit(sd_journal *j, const char *unit, uid_t uid) {
+        int r;
+        _cleanup_free_ char *m1 = NULL, *m2 = NULL, *m3 = NULL, *m4 = NULL;
+
+        assert(j);
+        assert(unit);
+
+        if (asprintf(&m1, "_SYSTEMD_USER_UNIT=%s", unit) < 0 ||
+            asprintf(&m2, "USER_UNIT=%s", unit) < 0 ||
+            asprintf(&m3, "COREDUMP_USER_UNIT=%s", unit) < 0 ||
+            asprintf(&m4, "_UID=%d", uid) < 0)
+                return -ENOMEM;
+
+        (void) (
+                /* Look for messages from the user service itself */
+                (r = sd_journal_add_match(j, m1, 0)) ||
+                (r = sd_journal_add_match(j, m4, 0)) ||
+
+                /* Look for messages from systemd about this service */
+                (r = sd_journal_add_disjunction(j)) ||
+                (r = sd_journal_add_match(j, m2, 0)) ||
+                (r = sd_journal_add_match(j, m4, 0)) ||
+
+                /* Look for coredumps of the service */
+                (r = sd_journal_add_disjunction(j)) ||
+                (r = sd_journal_add_match(j, m3, 0)) ||
+                (r = sd_journal_add_match(j, m4, 0))
+        );
         return r;
 }
 
+int add_match_this_boot(sd_journal *j) {
+        char match[9+32+1] = "_BOOT_ID=";
+        sd_id128_t boot_id;
+        int r;
+
+        assert(j);
+
+        r = sd_id128_get_boot(&boot_id);
+        if (r < 0) {
+                log_error("Failed to get boot id: %s", strerror(-r));
+                return r;
+        }
+
+        sd_id128_to_string(boot_id, match + 9);
+        r = sd_journal_add_match(j, match, strlen(match));
+        if (r < 0) {
+                log_error("Failed to add match: %s", strerror(-r));
+                return r;
+        }
+
+        r = sd_journal_add_conjunction(j);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+int show_journal_by_unit(
+                FILE *f,
+                const char *unit,
+                OutputMode mode,
+                unsigned n_columns,
+                usec_t not_before,
+                unsigned how_many,
+                uid_t uid,
+                OutputFlags flags,
+                bool system) {
+
+        _cleanup_journal_close_ sd_journal*j = NULL;
+        int r;
+        int jflags = SD_JOURNAL_LOCAL_ONLY | system * SD_JOURNAL_SYSTEM_ONLY;
+
+        assert(mode >= 0);
+        assert(mode < _OUTPUT_MODE_MAX);
+        assert(unit);
+
+        if (how_many <= 0)
+                return 0;
+
+        r = sd_journal_open(&j, jflags);
+        if (r < 0)
+                return r;
+
+        r = add_match_this_boot(j);
+        if (r < 0)
+                return r;
+
+        if (system)
+                r = add_matches_for_unit(j, unit);
+        else
+                r = add_matches_for_user_unit(j, unit, uid);
+        if (r < 0)
+                return r;
+
+        log_debug("Journal filter: %s", journal_make_match_string(j));
+
+        r = show_journal(f, j, mode, n_columns, not_before, how_many, flags);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
 static const char *const output_mode_table[_OUTPUT_MODE_MAX] = {
         [OUTPUT_SHORT] = "short",
         [OUTPUT_SHORT_MONOTONIC] = "short-monotonic",