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From 9f2aa24a4cad32e10cba693be95f3ff9c46ee73e Mon Sep 17 00:00:00 2001
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From: Yu Watanabe <watanabe.yu+github@gmail.com>
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Date: Sun, 27 Aug 2017 16:34:53 +0900
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Subject: [PATCH] journal-remote: show error message if output file name does
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 not end with .journal
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`journalctl -o export | systemd-journal-remote -o /tmp/dir -`
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gives the following error messages.
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```
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Failed to open output journal /tmp/dir: Invalid argument
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Failed to get writer for source stdin: Invalid argument
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Failed to create source for fd:0 (stdin): Invalid argument
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```
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And these are hard to understand what is the problem.
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This commit makes journal-remote check whether the output file name
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ends with .journal suffix or not, and if not, output error message.
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(cherry picked from commit 6b1b9f75c85d26ddbda62e7b7afa6944044f4f95)
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Resolves: bz#1267552
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---
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 src/journal-remote/journal-remote.c | 13 +++++++++----
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 1 file changed, 9 insertions(+), 4 deletions(-)
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diff --git a/src/journal-remote/journal-remote.c b/src/journal-remote/journal-remote.c
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index e65daf6a0b..431e28329b 100644
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--- a/src/journal-remote/journal-remote.c
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+++ b/src/journal-remote/journal-remote.c
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@@ -1479,10 +1479,15 @@ static int parse_argv(int argc, char *argv[]) {
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                 arg_split_mode = JOURNAL_WRITE_SPLIT_NONE;
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         }
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-        if (arg_split_mode == JOURNAL_WRITE_SPLIT_NONE
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-            && arg_output && is_dir(arg_output, true) > 0) {
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-                log_error("For SplitMode=none, output must be a file.");
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-                return -EINVAL;
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+        if (arg_split_mode == JOURNAL_WRITE_SPLIT_NONE && arg_output) {
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+                if (is_dir(arg_output, true) > 0) {
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+                        log_error("For SplitMode=none, output must be a file.");
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+                        return -EINVAL;
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+                }
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+                if (!endswith(arg_output, ".journal")) {
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+                        log_error("For SplitMode=none, output file name must end with .journal.");
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+                        return -EINVAL;
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+                }
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         }
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         if (arg_split_mode == JOURNAL_WRITE_SPLIT_HOST