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authorGravatar Jörg Krause <joerg.krause@embedded.rocks>2018-04-04 20:09:35 +0200
committerGravatar Peter Korsgaard <peter@korsgaard.com>2018-05-01 21:53:45 +0200
commit6919fc55660eafd1a55c2e8535cc9291c251faf5 (patch)
treecb3dcb186c181e03aca25a077d08bb5c0c6a80fd /package/sysvinit
parent456ea9871ea015fe2c5a7eb79c4762787286fa56 (diff)
downloadbuildroot-6919fc55660eafd1a55c2e8535cc9291c251faf5.tar.gz
buildroot-6919fc55660eafd1a55c2e8535cc9291c251faf5.tar.bz2
sysvinit: add /dev/std{in, out, err} symlinks to inittab
Some applications, e.g. bashs process subsitution feature, rely on the convention of `/dev/fd` being a symbolic link to `/proc/self/fd`. This symbolic link and his companions `/dev/std*` are created by (e)udev [1], but not by mdev, resulting in the following error when using the following expression: ``` bash: /dev/fd/62: No such file or directory ``` For the sake of simplicity, lets fix this by creating the symlinks in inittab. It is only really needed if eudev isn't used, but it doesn't really hurt to create them even if eudev will recreate them afterwards. Note, that we do not create the symlink `/dev/core` as `/proc/kcore` is not available on all platforms, e.g. ARM, and the feature is not much appreciated [2]. [1] https://github.com/gentoo/eudev/blob/8943501993322c59a6eb5be456b0d716aafff21e/src/shared/dev-setup.c#L35-L40 [2] https://lwn.net/Articles/45315/ [Peter: redirect errors to /dev/null for ro rootfs] Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Diffstat (limited to 'package/sysvinit')
-rw-r--r--package/sysvinit/inittab6
1 files changed, 5 insertions, 1 deletions
diff --git a/package/sysvinit/inittab b/package/sysvinit/inittab
index fad91eae8b..7eaef59d9e 100644
--- a/package/sysvinit/inittab
+++ b/package/sysvinit/inittab
@@ -9,7 +9,11 @@ si1::sysinit:/bin/mount -o remount,rw /
si2::sysinit:/bin/mkdir -p /dev/pts
si3::sysinit:/bin/mkdir -p /dev/shm
si4::sysinit:/bin/mount -a
-si5::sysinit:/bin/hostname -F /etc/hostname
+si5::sysinit:/bin/ln -sf /proc/self/fd /dev/fd 2>/dev/null
+si6::sysinit:/bin/ln -sf /proc/self/fd/0 /dev/stdin 2>/dev/null
+si7::sysinit:/bin/ln -sf /proc/self/fd/1 /dev/stdout 2>/dev/null
+si8::sysinit:/bin/ln -sf /proc/self/fd/2 /dev/stderr 2>/dev/null
+si9::sysinit:/bin/hostname -F /etc/hostname
rcS:12345:wait:/etc/init.d/rcS
# S0:1:respawn:/sbin/getty -L ttyS0 115200 vt100 # GENERIC_SERIAL