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| author | Dominik Brodowski <linux@dominikbrodowski.net> | 2018-10-23 16:00:10 +0200 |
|---|---|---|
| committer | Dominik Brodowski <linux@dominikbrodowski.net> | 2019-12-12 18:58:24 +0100 |
| commit | b49a733d684e0096340b93e9dfd471f0e3ddc06d (patch) | |
| tree | 0ad59f513c9ca4af672a9e683935ce6c27a6289b | |
| parent | cccaa5e33525fc07f4a2ce0518e50b9ddf435e47 (diff) | |
| download | linux-b49a733d684e0096340b93e9dfd471f0e3ddc06d.tar.gz linux-b49a733d684e0096340b93e9dfd471f0e3ddc06d.tar.bz2 linux-b49a733d684e0096340b93e9dfd471f0e3ddc06d.zip | |
init: unify opening /dev/console as stdin/stdout/stderr
Merge the two instances where /dev/console is opened as
stdin/stdout/stderr.
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
| -rw-r--r-- | include/linux/initrd.h | 2 | ||||
| -rw-r--r-- | init/do_mounts_initrd.c | 5 | ||||
| -rw-r--r-- | init/main.c | 17 |
3 files changed, 15 insertions, 9 deletions
diff --git a/include/linux/initrd.h b/include/linux/initrd.h index d77fe34fb00a..aa5914355728 100644 --- a/include/linux/initrd.h +++ b/include/linux/initrd.h @@ -28,3 +28,5 @@ extern unsigned int real_root_dev; extern char __initramfs_start[]; extern unsigned long __initramfs_size; + +void console_on_rootfs(void); diff --git a/init/do_mounts_initrd.c b/init/do_mounts_initrd.c index 3bf7b74153ab..dab8b1151b56 100644 --- a/init/do_mounts_initrd.c +++ b/init/do_mounts_initrd.c @@ -48,10 +48,7 @@ early_param("initrd", early_initrd); static int init_linuxrc(struct subprocess_info *info, struct cred *new) { ksys_unshare(CLONE_FS | CLONE_FILES); - /* stdin/stdout/stderr for /linuxrc */ - ksys_open("/dev/console", O_RDWR, 0); - ksys_dup(0); - ksys_dup(0); + console_on_rootfs(); /* move initrd over / and chdir/chroot in initrd root */ ksys_chdir("/root"); do_mount(".", "/", NULL, MS_MOVE, NULL); diff --git a/init/main.c b/init/main.c index 91f6ebb30ef0..2cd736059416 100644 --- a/init/main.c +++ b/init/main.c @@ -1155,6 +1155,17 @@ static int __ref kernel_init(void *unused) "See Linux Documentation/admin-guide/init.rst for guidance."); } +void console_on_rootfs(void) +{ + /* Open the /dev/console as stdin, this should never fail */ + if (ksys_open((const char __user *) "/dev/console", O_RDWR, 0) < 0) + pr_err("Warning: unable to open an initial console.\n"); + + /* create stdout/stderr */ + (void) ksys_dup(0); + (void) ksys_dup(0); +} + static noinline void __init kernel_init_freeable(void) { /* @@ -1190,12 +1201,8 @@ static noinline void __init kernel_init_freeable(void) do_basic_setup(); - /* Open the /dev/console on the rootfs, this should never fail */ - if (ksys_open((const char __user *) "/dev/console", O_RDWR, 0) < 0) - pr_err("Warning: unable to open an initial console.\n"); + console_on_rootfs(); - (void) ksys_dup(0); - (void) ksys_dup(0); /* * check if there is an early userspace init. If yes, let it do all * the work |