Timo Ketola 98a6f1fc02 fs/cpio: make initramfs init script survive 'console=' kernel argument ... When booting with 'console=<empty>' in the kernel command line (as e.g. U-Boot does with silent flags in effect), opening /dev/console fails. As per POSIX [0], when iany redirection fails, the shell running exec shal exit in error. So, when 'console=<empty>' is specified. /dev/console can't be opened, and the redirection fails, and /init is killed. That behaviour was fixed on the kernel side with commit 2bd3a997befc2 (Open /dev/console from rootfs), present since 2.6.34, released in May 2010, so any [dr]ecent kernel will have that fix. Furthermore, busybox will fix things up anyway (in bb_sanitize_stdio()), falling back to opening /dev/null if no console is availble. systemd does a similar thing (in make_console_stdio()), and sysvinit again has a similar approach (in console_init()). The archealogy search turned up those relevant commits: 2011-08-04 10a130f91e initramfs/init: make sure that 0, 1, 2 fds are available introduces the three exec redirections in initramfs 2011-09-06 3fac21ef8d cpio: fix boot with dynamic /dev introduces the three exec redirections in cpio 2011-09-06 13a3afc536 fs/initramfs: refactor with fs/cpio dropped the initramfs tweaks to reuse the cpio ones 2012-11-04 e1ebae700a fs/common: Create initial console device introduces the /dev/console char,5,1 pseudo device creation in cpio 2018-03-31 dec061adce fs/cpio: don't extend packages' permissions table switched from the permission-table to a manual mknod to create /dev/console The redirections were added before we could guarantee there was a /dev/console in the rootfs. We're now guaranteed to have /dev/console in an initramfs, and any recent kernel will automatically open /dev/console before spawning /init. The three redirections are useless now, and cause harm under certain conditions. Drop them. [0] https://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_20_01 Signed-off-by: Timo Ketola <timo.ketola@exertus.fi> Cc: Peter Korsgaard <peter@korsgaard.com> [yann.morin.1998@free.fr: - extend commit log with the analysis done with Peter ] Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>		2020-04-25 14:06:34 +02:00
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axfs	fs: make it behave a bit more like the package infra	2018-01-03 21:58:07 +01:00
btrfs	fs: don't use := when not needed	2019-10-27 10:35:06 +01:00
cloop	fs: make it behave a bit more like the package infra	2018-01-03 21:58:07 +01:00
cpio	fs/cpio: make initramfs init script survive 'console=' kernel argument	2020-04-25 14:06:34 +02:00
cramfs	fs/cramfs: add xip option	2018-04-09 11:29:46 +02:00
erofs	fs/erofs: add support for creating EROFS rootfs image	2020-03-19 18:43:15 +01:00
ext2	fs/ext2: pass a default string to filesystem label	2020-04-15 22:49:26 +02:00
f2fs	fs: don't use := when not needed	2019-10-27 10:35:06 +01:00
initramfs	fs/initramfs: fix show-info	2020-03-18 22:44:19 +01:00
iso9660	fs/*/*.mk: fix code style	2018-04-01 08:40:41 +02:00
jffs2	fs: don't use := when not needed	2019-10-27 10:35:06 +01:00
romfs	fs: make it behave a bit more like the package infra	2018-01-03 21:58:07 +01:00
squashfs	fs/squashfs: add zstd support	2018-04-25 23:39:04 +02:00
tar	fs: don't use := when not needed	2019-10-27 10:35:06 +01:00
ubi	fs: don't use := when not needed	2019-10-27 10:35:06 +01:00
ubifs	fs: make it behave a bit more like the package infra	2018-01-03 21:58:07 +01:00
yaffs2	fs/yaffs2: fix code style	2018-04-01 07:55:22 +02:00
common.mk	fs/common.mk: enable multithreaded xz compression	2019-08-03 19:29:47 +02:00
Config.in	fs/erofs: add support for creating EROFS rootfs image	2020-03-19 18:43:15 +01:00