From 98d1fe84e1eac91563bff326539465cd34e971c0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
Date: Sat, 7 Feb 2015 11:35:37 -0500
Subject: [PATCH] systemctl: support auditd.service better

We would print the filename header before trying to open the file. But since
the header was printed to stdout, and the error to stderr, the error would appear
on the terminal before the header. It is cleaner to open the file first, then
and only then print the header.

Also exit on first error. We shouldn't report success if we were unable to open
a file.

(cherry picked from commit 8527b07be1c5211b50a1a6496585952857a25c73)
---
 src/systemctl/systemctl.c | 46 +++++++++++++++++++++++-----------------------
 1 file changed, 23 insertions(+), 23 deletions(-)

diff --git a/src/systemctl/systemctl.c b/src/systemctl/systemctl.c
index 3da4d3d..4ec0cff 100644
--- a/src/systemctl/systemctl.c
+++ b/src/systemctl/systemctl.c
@@ -4555,6 +4555,23 @@ static int init_home_and_lookup_paths(char **user_home, char **user_runtime, Loo
         return 0;
 }
 
+static int cat_file(const char *filename, bool newline) {
+        _cleanup_close_ int fd;
+
+        fd = open(filename, O_RDONLY|O_CLOEXEC|O_NOCTTY);
+        if (fd < 0)
+                return -errno;
+
+        printf("%s%s# %s%s\n",
+               newline ? "\n" : "",
+               ansi_highlight_blue(),
+               filename,
+               ansi_highlight_off());
+        fflush(stdout);
+
+        return copy_bytes(fd, STDOUT_FILENO, (off_t) -1, false);
+}
+
 static int cat(sd_bus *bus, char **args) {
         _cleanup_free_ char *user_home = NULL;
         _cleanup_free_ char *user_runtime = NULL;
@@ -4600,32 +4617,15 @@ static int cat(sd_bus *bus, char **args) {
                         puts("");
 
                 if (fragment_path) {
-                        printf("%s# %s%s\n",
-                               ansi_highlight_blue(),
-                               fragment_path,
-                               ansi_highlight_off());
-                        fflush(stdout);
-
-                        r = copy_file_fd(fragment_path, STDOUT_FILENO, false);
-                        if (r < 0) {
-                                log_warning_errno(r, "Failed to cat %s: %m", fragment_path);
-                                continue;
-                        }
+                        r = cat_file(fragment_path, false);
+                        if (r < 0)
+                                return log_warning_errno(r, "Failed to cat %s: %m", fragment_path);
                 }
 
                 STRV_FOREACH(path, dropin_paths) {
-                        printf("%s%s# %s%s\n",
-                               isempty(fragment_path) && path == dropin_paths ? "" : "\n",
-                               ansi_highlight_blue(),
-                               *path,
-                               ansi_highlight_off());
-                        fflush(stdout);
-
-                        r = copy_file_fd(*path, STDOUT_FILENO, false);
-                        if (r < 0) {
-                                log_warning_errno(r, "Failed to cat %s: %m", *path);
-                                continue;
-                        }
+                        r = cat_file(*path, path == dropin_paths);
+                        if (r < 0)
+                                return log_warning_errno(r, "Failed to cat %s: %m", *path);
                 }
         }