terminal-util: unify code that resets /dev/console in common helper

We have pretty much the same code at two places, let's make it one.

Author: poettering

src/basic/terminal-util.c

@@ -582,6 +582,31 @@ int vt_disallocate(const char *name) {
         return 0;
 }
 
+void reset_dev_console_fd(int fd, bool switch_to_text) {
+        int r;
+
+        assert(fd >= 0);
+
+        r = reset_terminal_fd(fd, switch_to_text);
+        if (r < 0)
+                log_warning_errno(r, "Failed to reset /dev/console, ignoring: %m");
+
+        unsigned rows, cols;
+        r = proc_cmdline_tty_size("/dev/console", &rows, &cols);
+        if (r < 0)
+                log_warning_errno(r, "Failed to get /dev/console size, ignoring: %m");
+        else if (r > 0) {
+                r = terminal_set_size_fd(fd, NULL, rows, cols);
+                if (r < 0)
+                        log_warning_errno(r, "Failed to set configured terminal size on /dev/console, ignoring: %m");
+        } else
+                (void) terminal_fix_size(fd, fd);
+
+        r = terminal_reset_ansi_seq(fd);
+        if (r < 0)
+                log_warning_errno(r, "Failed to reset /dev/console using ANSI sequences, ignoring: %m");
+}
+
 int make_console_stdio(void) {
         int fd, r;
 
@@ -598,25 +623,7 @@ int make_console_stdio(void) {
                         return log_error_errno(r, "Failed to make /dev/null stdin/stdout/stderr: %m");
 
         } else {
-                unsigned rows, cols;
-
-                r = reset_terminal_fd(fd, /* switch_to_text= */ true);
-                if (r < 0)
-                        log_warning_errno(r, "Failed to reset terminal, ignoring: %m");
-
-                r = proc_cmdline_tty_size("/dev/console", &rows, &cols);
-                if (r < 0)
-                        log_warning_errno(r, "Failed to get terminal size, ignoring: %m");
-                else if (r > 0) {
-                        r = terminal_set_size_fd(fd, NULL, rows, cols);
-                        if (r < 0)
-                                log_warning_errno(r, "Failed to set configured terminal size, ignoring: %m");
-                } else
-                        (void) terminal_fix_size(fd, fd);
-
-                r = terminal_reset_ansi_seq(fd);
-                if (r < 0)
-                        log_warning_errno(r, "Failed to reset terminal using ANSI sequences, ignoring: %m");
+                reset_dev_console_fd(fd, /* switch_to_text= */ true);
 
                 r = rearrange_stdio(fd, fd, fd); /* This invalidates 'fd' both on success and on failure. */
                 if (r < 0)

src/basic/terminal-util.h

@@ -156,6 +156,7 @@ bool tty_is_console(const char *tty) _pure_;
 int vtnr_from_tty(const char *tty);
 const char* default_term_for_tty(const char *tty);
 
+void reset_dev_console_fd(int fd, bool switch_to_text);
 int make_console_stdio(void);
 
 int fd_columns(int fd);

src/core/main.c

@@ -205,33 +205,18 @@ static int manager_find_user_config_paths(char ***ret_files, char ***ret_dirs) {
 }
 
 static int console_setup(void) {
+
+        if (getpid_cached() != 1)
+                return 0;
+
         _cleanup_close_ int tty_fd = -EBADF;
-        unsigned rows, cols;
-        int r;
 
-        tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
+        tty_fd = open_terminal("/dev/console", O_RDWR|O_NOCTTY|O_CLOEXEC);
         if (tty_fd < 0)
                 return log_error_errno(tty_fd, "Failed to open /dev/console: %m");
 
-        /* We don't want to force text mode.  plymouth may be showing
-         * pictures already from initrd. */
-        r = reset_terminal_fd(tty_fd, false);
-        if (r < 0)
-                return log_error_errno(r, "Failed to reset /dev/console: %m");
-
-        r = proc_cmdline_tty_size("/dev/console", &rows, &cols);
-        if (r < 0)
-                log_warning_errno(r, "Failed to get /dev/console size, ignoring: %m");
-        else {
-                r = terminal_set_size_fd(tty_fd, NULL, rows, cols);
-                if (r < 0)
-                        log_warning_errno(r, "Failed to set /dev/console size, ignoring: %m");
-        }
-
-        r = terminal_reset_ansi_seq(tty_fd);
-        if (r < 0)
-                log_warning_errno(r, "Failed to reset /dev/console using ANSI sequences, ignoring: %m");
-
+        /* We don't want to force text mode. Plymouth may be showing pictures already from initrd. */
+        reset_dev_console_fd(tty_fd, /* switch_to_text= */ false);
         return 0;
 }
 
@@ -2910,7 +2895,7 @@ static void setup_console_terminal(bool skip_setup) {
         (void) release_terminal();
 
         /* Reset the console, but only if this is really init and we are freshly booted */
-        if (getpid_cached() == 1 && !skip_setup)
+        if (!skip_setup)
                 (void) console_setup();
 }