systemctl: suppress duplicate newline if there's not log output in "systemctl status"

[elogind.git] / src / shared / logs-show.c

diff --git a/src/shared/logs-show.c b/src/shared/logs-show.c
index 61c3652bd5ae32943d020f3f4e98f241071de9f9..f7d84fc723d233bd05fde439356ac124125b4733 100644 (file)
--- a/src/shared/logs-show.c
+++ b/src/shared/logs-show.c
@@ -124,6 +124,11 @@ static bool print_multiline(FILE *f, unsigned prefix, unsigned n_columns, Output
                 }
         }
 
+        /* A special case: make sure that we print a newline when
+           the message is empty. */
+        if (message_len == 0)
+                fputs("\n", f);
+
         for (pos = message;
              pos < message + message_len;
              pos = end + 1, line++) {
@@ -922,6 +927,21 @@ int output_journal(
         return ret;
 }
 
+static int maybe_print_begin_newline(FILE *f, OutputFlags *flags) {
+        assert(f);
+        assert(flags);
+
+        if (!(*flags & OUTPUT_BEGIN_NEWLINE))
+                return 0;
+
+        /* Print a beginning new line if that's request, but only once
+         * on the first line we print. */
+
+        fputc('\n', f);
+        *flags &= ~OUTPUT_BEGIN_NEWLINE;
+        return 0;
+}
+
 static int show_journal(FILE *f,
                         sd_journal *j,
                         OutputMode mode,
@@ -979,6 +999,7 @@ static int show_journal(FILE *f,
                         }
 
                         line ++;
+                        maybe_print_begin_newline(f, &flags);
 
                         r = output_journal(f, j, mode, n_columns, flags, ellipsized);
                         if (r < 0)
@@ -999,8 +1020,10 @@ static int show_journal(FILE *f,
                         if (r < 0)
                                 goto finish;
 
-                        if (r > 0 && not_before < cutoff)
+                        if (r > 0 && not_before < cutoff) {
+                                maybe_print_begin_newline(f, &flags);
                                 fprintf(f, "Warning: Journal has been rotated since unit was started. Log output is incomplete or unavailable.\n");
+                        }
 
                         warn_cutoff = false;
                 }