chiark / gitweb /
logs-show: print a debug message when we skip entries without MESSAGE= fields
[elogind.git] / src / shared / logs-show.c
index 2da4ef3e120b664bcd312a13110c2d7f235f227f..068da465d9fcdb816c9230cbe6cc6d251b110939 100644 (file)
@@ -20,9 +20,7 @@
 ***/
 
 #include <time.h>
-#include <assert.h>
 #include <errno.h>
-#include <sys/poll.h>
 #include <sys/socket.h>
 #include <string.h>
 #include <fcntl.h>
 #include "util.h"
 #include "utf8.h"
 #include "hashmap.h"
-#include "fileio.h"
 #include "journal-internal.h"
+#include "formats-util.h"
+#include "process-util.h"
+#include "terminal-util.h"
 
 /* up to three lines (each up to 100 characters),
    or 300 characters, whichever is less */
@@ -272,10 +272,12 @@ static int output_short(
         }
 
         if (r < 0)
-                return r;
+                return log_error_errno(r, "Failed to get journal fields: %m");
 
-        if (!message)
+        if (!message) {
+                log_debug("Skipping message without MESSAGE= field.");
                 return 0;
+        }
 
         if (!(flags & OUTPUT_SHOW_ALL))
                 strip_tab_ansi(&message, &message_len);
@@ -408,11 +410,9 @@ static int output_verbose(
         r = sd_journal_get_data(j, "_SOURCE_REALTIME_TIMESTAMP", &data, &length);
         if (r == -ENOENT)
                 log_debug("Source realtime timestamp not found");
-        else if (r < 0) {
-                log_full(r == -EADDRNOTAVAIL ? LOG_DEBUG : LOG_ERR,
-                         "Failed to get source realtime timestamp: %s", strerror(-r));
-                return r;
-        } else {
+        else if (r < 0)
+                return log_full_errno(r == -EADDRNOTAVAIL ? LOG_DEBUG : LOG_ERR, r, "Failed to get source realtime timestamp: %m");
+        else {
                 _cleanup_free_ char *value = NULL;
                 size_t size;
 
@@ -428,11 +428,8 @@ static int output_verbose(
 
         if (r < 0) {
                 r = sd_journal_get_realtime_usec(j, &realtime);
-                if (r < 0) {
-                        log_full(r == -EADDRNOTAVAIL ? LOG_DEBUG : LOG_ERR,
-                                 "Failed to get realtime timestamp: %s", strerror(-r));
-                        return r;
-                }
+                if (r < 0)
+                        return log_full_errno(r == -EADDRNOTAVAIL ? LOG_DEBUG : LOG_ERR, r, "Failed to get realtime timestamp: %m");
         }
 
         r = sd_journal_get_cursor(j, &cursor);
@@ -682,7 +679,7 @@ static int output_json(
 
         h = hashmap_new(&string_hash_ops);
         if (!h)
-                return -ENOMEM;
+                return log_oom();
 
         /* First round, iterate through the entry and count how often each field appears */
         JOURNAL_FOREACH_DATA_RETVAL(j, data, length, r) {
@@ -700,7 +697,7 @@ static int output_json(
 
                 n = strndup(data, eq - (const char*) data);
                 if (!n) {
-                        r = -ENOMEM;
+                        r = log_oom();
                         goto finish;
                 }
 
@@ -709,13 +706,16 @@ static int output_json(
                         r = hashmap_put(h, n, UINT_TO_PTR(1));
                         if (r < 0) {
                                 free(n);
+                                log_oom();
                                 goto finish;
                         }
                 } else {
                         r = hashmap_update(h, n, UINT_TO_PTR(u + 1));
                         free(n);
-                        if (r < 0)
+                        if (r < 0) {
+                                log_oom();
                                 goto finish;
+                        }
                 }
         }
 
@@ -753,7 +753,7 @@ static int output_json(
 
                         n = strndup(data, m);
                         if (!n) {
-                                r = -ENOMEM;
+                                r = log_oom();
                                 goto finish;
                         }
 
@@ -858,8 +858,7 @@ static int output_cat(
                 if (r == -ENOENT)
                         return 0;
 
-                log_error_errno(r, "Failed to get data: %m");
-                return r;
+                return log_error_errno(r, "Failed to get data: %m");
         }
 
         assert(l >= 8);
@@ -949,11 +948,11 @@ static int show_journal(FILE *f,
         /* Seek to end */
         r = sd_journal_seek_tail(j);
         if (r < 0)
-                goto finish;
+                return log_error_errno(r, "Failed to seek to tail: %m");
 
         r = sd_journal_previous_skip(j, how_many);
         if (r < 0)
-                goto finish;
+                return log_error_errno(r, "Failed to skip previous: %m");
 
         for (;;) {
                 for (;;) {
@@ -962,7 +961,7 @@ static int show_journal(FILE *f,
                         if (need_seek) {
                                 r = sd_journal_next(j);
                                 if (r < 0)
-                                        goto finish;
+                                        return log_error_errno(r, "Failed to iterate through journal: %m");
                         }
 
                         if (r == 0)
@@ -978,7 +977,7 @@ static int show_journal(FILE *f,
                                 if (r == -ESTALE)
                                         continue;
                                 else if (r < 0)
-                                        goto finish;
+                                        return log_error_errno(r, "Failed to get journal time: %m");
 
                                 if (usec < not_before)
                                         continue;
@@ -989,22 +988,22 @@ static int show_journal(FILE *f,
 
                         r = output_journal(f, j, mode, n_columns, flags, ellipsized);
                         if (r < 0)
-                                goto finish;
+                                return r;
                 }
 
                 if (warn_cutoff && line < how_many && not_before > 0) {
                         sd_id128_t boot_id;
-                        usec_t cutoff;
+                        usec_t cutoff = 0;
 
                         /* Check whether the cutoff line is too early */
 
                         r = sd_id128_get_boot(&boot_id);
                         if (r < 0)
-                                goto finish;
+                                return log_error_errno(r, "Failed to get boot id: %m");
 
                         r = sd_journal_get_cutoff_monotonic_usec(j, boot_id, &cutoff, NULL);
                         if (r < 0)
-                                goto finish;
+                                return log_error_errno(r, "Failed to get journal cutoff time: %m");
 
                         if (r > 0 && not_before < cutoff) {
                                 maybe_print_begin_newline(f, &flags);
@@ -1019,12 +1018,11 @@ static int show_journal(FILE *f,
 
                 r = sd_journal_wait(j, USEC_INFINITY);
                 if (r < 0)
-                        goto finish;
+                        return log_error_errno(r, "Failed to wait for journal: %m");
 
         }
 
-finish:
-        return r;
+        return 0;
 }
 
 int add_matches_for_unit(sd_journal *j, const char *unit) {
@@ -1034,10 +1032,10 @@ int add_matches_for_unit(sd_journal *j, const char *unit) {
         assert(j);
         assert(unit);
 
-        m1 = strappenda("_SYSTEMD_UNIT=", unit);
-        m2 = strappenda("COREDUMP_UNIT=", unit);
-        m3 = strappenda("UNIT=", unit);
-        m4 = strappenda("OBJECT_SYSTEMD_UNIT=", unit);
+        m1 = strjoina("_SYSTEMD_UNIT=", unit);
+        m2 = strjoina("COREDUMP_UNIT=", unit);
+        m3 = strjoina("UNIT=", unit);
+        m4 = strjoina("OBJECT_SYSTEMD_UNIT=", unit);
 
         (void)(
             /* Look for messages from the service itself */
@@ -1081,10 +1079,10 @@ int add_matches_for_user_unit(sd_journal *j, const char *unit, uid_t uid) {
         assert(j);
         assert(unit);
 
-        m1 = strappenda("_SYSTEMD_USER_UNIT=", unit);
-        m2 = strappenda("USER_UNIT=", unit);
-        m3 = strappenda("COREDUMP_USER_UNIT=", unit);
-        m4 = strappenda("OBJECT_SYSTEMD_USER_UNIT=", unit);
+        m1 = strjoina("_SYSTEMD_USER_UNIT=", unit);
+        m2 = strjoina("USER_UNIT=", unit);
+        m3 = strjoina("COREDUMP_USER_UNIT=", unit);
+        m4 = strjoina("OBJECT_SYSTEMD_USER_UNIT=", unit);
         sprintf(muid, "_UID="UID_FMT, uid);
 
         (void) (
@@ -1167,9 +1165,9 @@ static int get_boot_id_for_machine(const char *machine, sd_id128_t *boot_id) {
                 if (fd < 0)
                         _exit(EXIT_FAILURE);
 
-                k = loop_read(fd, buf, 36, false);
+                r = loop_read_exact(fd, buf, 36, false);
                 safe_close(fd);
-                if (k != 36)
+                if (r < 0)
                         _exit(EXIT_FAILURE);
 
                 k = send(pair[1], buf, 36, MSG_NOSIGNAL);
@@ -1221,7 +1219,7 @@ int add_match_this_boot(sd_journal *j, const char *machine) {
 
         r = sd_journal_add_conjunction(j);
         if (r < 0)
-                return r;
+                return log_error_errno(r, "Failed to add conjunction: %m");
 
         return 0;
 }
@@ -1235,12 +1233,12 @@ int show_journal_by_unit(
                 unsigned how_many,
                 uid_t uid,
                 OutputFlags flags,
-                bool system,
+                int journal_open_flags,
+                bool system_unit,
                 bool *ellipsized) {
 
         _cleanup_journal_close_ sd_journal*j = NULL;
         int r;
-        int jflags = SD_JOURNAL_LOCAL_ONLY | system * SD_JOURNAL_SYSTEM;
 
         assert(mode >= 0);
         assert(mode < _OUTPUT_MODE_MAX);
@@ -1249,25 +1247,28 @@ int show_journal_by_unit(
         if (how_many <= 0)
                 return 0;
 
-        r = sd_journal_open(&j, jflags);
+        r = sd_journal_open(&j, journal_open_flags);
         if (r < 0)
-                return r;
+                return log_error_errno(r, "Failed to open journal: %m");
 
         r = add_match_this_boot(j, NULL);
         if (r < 0)
                 return r;
 
-        if (system)
+        if (system_unit)
                 r = add_matches_for_unit(j, unit);
         else
                 r = add_matches_for_user_unit(j, unit, uid);
         if (r < 0)
-                return r;
+                return log_error_errno(r, "Failed to add unit matches: %m");
 
-        if (_unlikely_(log_get_max_level() >= LOG_PRI(LOG_DEBUG))) {
+        if (_unlikely_(log_get_max_level() >= LOG_DEBUG)) {
                 _cleanup_free_ char *filter;
 
                 filter = journal_make_match_string(j);
+                if (!filter)
+                        return log_oom();
+
                 log_debug("Journal filter: %s", filter);
         }