systemd/0055-Revert-terminal-util-unify-code-that-resets-dev-cons.patch

From 2b379aa0cbce5c4ddee5ca118387503023b5474c Mon Sep 17 00:00:00 2001
From: Luca Boccassi <luca.boccassi@gmail.com>
Date: Thu, 19 Dec 2024 12:26:36 +0000
Subject: [PATCH] Revert "terminal-util: unify code that resets /dev/console in
 common helper"

This reverts commit 2736295ddb78a457796f24805e7b98c3f5304848.
---
 src/basic/terminal-util.c | 53 ++++++++++++++++-----------------------
 src/basic/terminal-util.h |  3 ++-
 src/core/main.c           | 30 ++++++++++++++++------
 3 files changed, 45 insertions(+), 41 deletions(-)

diff --git a/src/basic/terminal-util.c b/src/basic/terminal-util.c
index 878c1ec06a..409f2abb45 100644
--- a/src/basic/terminal-util.c
+++ b/src/basic/terminal-util.c
@@ -577,7 +577,7 @@ static int vt_reset_keyboard(int fd) {
         return RET_NERRNO(ioctl(fd, KDSKBMODE, kb));
 }
 
-static int terminal_reset_ioctl(int fd, bool switch_to_text) {
+int terminal_reset_ioctl(int fd, bool switch_to_text) {
         struct termios termios;
         int r;
 
@@ -645,7 +645,7 @@ finish:
         return r;
 }
 
-static int terminal_reset_ansi_seq(int fd) {
+int terminal_reset_ansi_seq(int fd) {
         int r, k;
 
         assert(fd >= 0);
@@ -675,35 +675,6 @@ static int terminal_reset_ansi_seq(int fd) {
         return k < 0 ? k : r;
 }
 
-void reset_dev_console_fd(int fd, bool switch_to_text) {
-        int r;
-
-        assert(fd >= 0);
-
-        _cleanup_close_ int lock_fd = lock_dev_console();
-        if (lock_fd < 0)
-                log_debug_errno(lock_fd, "Failed to lock /dev/console, ignoring: %m");
-
-        r = terminal_reset_ioctl(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 lock_dev_console(void) {
         _cleanup_close_ int fd = -EBADF;
         int r;
@@ -737,7 +708,25 @@ int make_console_stdio(void) {
                         return log_error_errno(r, "Failed to make /dev/null stdin/stdout/stderr: %m");
 
         } else {
-                reset_dev_console_fd(fd, /* switch_to_text= */ true);
+                unsigned rows, cols;
+
+                r = terminal_reset_ioctl(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");
 
                 r = rearrange_stdio(fd, fd, fd); /* This invalidates 'fd' both on success and on failure. */
                 if (r < 0)
diff --git a/src/basic/terminal-util.h b/src/basic/terminal-util.h
index c30faf168c..90662e2e66 100644
--- a/src/basic/terminal-util.h
+++ b/src/basic/terminal-util.h
@@ -39,6 +39,8 @@
 
 bool isatty_safe(int fd);
 
+int terminal_reset_ioctl(int fd, bool switch_to_text);
+int terminal_reset_ansi_seq(int fd);
 int terminal_reset_defensive(int fd, bool switch_to_text);
 int terminal_reset_defensive_locked(int fd, bool switch_to_text);
 
@@ -101,7 +103,6 @@ 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 lock_dev_console(void);
 int make_console_stdio(void);
 
diff --git a/src/core/main.c b/src/core/main.c
index 172742c769..4bd2d8df75 100644
--- a/src/core/main.c
+++ b/src/core/main.c
@@ -245,18 +245,32 @@ unset:
 }
 
 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_RDWR|O_NOCTTY|O_CLOEXEC);
+        tty_fd = open_terminal("/dev/console", O_WRONLY|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. */
-        reset_dev_console_fd(tty_fd, /* switch_to_text= */ false);
+        /* We don't want to force text mode.  plymouth may be showing
+         * pictures already from initrd. */
+        r = terminal_reset_ioctl(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");
 
         save_console_winsize_in_environment(tty_fd);
 
@@ -2977,7 +2991,7 @@ 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 (!skip_setup)
+        if (getpid_cached() == 1 && !skip_setup)
                 (void) console_setup();
 }