* [Buildroot] [git commit] Allow several device tables and split in two parts our device table
@ 2011-05-10 21:43 Thomas Petazzoni
2011-05-17 7:04 ` Thomas Petazzoni
0 siblings, 1 reply; 5+ messages in thread
From: Thomas Petazzoni @ 2011-05-10 21:43 UTC (permalink / raw)
To: buildroot
commit: http://git.buildroot.net/buildroot/commit/?id=4e005c47e535fcde9bff04699774bde36f358b38
branch: http://git.buildroot.net/buildroot/commit/?id=refs/heads/master
This allows to have a device table for all directories/files and
another device table for the device files themselves. Both are needed
for static /dev, but only the first one is needed when
devtmpfs/mdev/udev are used.
We take this opportunity to move the documentation of the device table
format in a common location, package/makedevs/README.
[Peter: simplify code slightly, fix indentation]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
---
fs/Config.in | 20 +++-
fs/common.mk | 10 +-
package/makedevs/README | 35 +++++++
target/generic/device_table.txt | 187 ++--------------------------------
target/generic/device_table_dev.txt | 143 ++++++++++++++++++++++++++
5 files changed, 209 insertions(+), 186 deletions(-)
create mode 100644 package/makedevs/README
create mode 100644 target/generic/device_table_dev.txt
diff --git a/fs/Config.in b/fs/Config.in
index 9ac3acc..6f0f82b 100644
--- a/fs/Config.in
+++ b/fs/Config.in
@@ -36,13 +36,21 @@ config BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_UDEV
endchoice
config BR2_ROOTFS_DEVICE_TABLE
- string "Path to the device table"
- depends on BR2_ROOTFS_DEVICE_CREATION_STATIC
- default "target/generic/device_table.txt"
+ string "Path to the device tables"
+ default "target/generic/device_table.txt target/generic/device_table_dev.txt" \
+ if BR2_ROOTFS_DEVICE_CREATION_STATIC
+ default "target/generic/device_table.txt" \
+ if (BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_MDEV || \
+ BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_UDEV || \
+ BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_DEVTMPFS)
help
- Specify the location of a device table, that will be passed
- to the makedevs utility to create all the special device
- files in the target filesystem.
+ Specify a space-separated list of device table locations,
+ that will be passed to the makedevs utility to create all
+ the special device files and assign correct owners and
+ permissions on various files in the target filesystem.
+
+ See package/makedevs/README for details on the usage and
+ syntax of these files.
choice
prompt "Root FS skeleton"
diff --git a/fs/common.mk b/fs/common.mk
index 92be00c..4d50514 100644
--- a/fs/common.mk
+++ b/fs/common.mk
@@ -32,7 +32,8 @@
# macro will automatically generate a compressed filesystem image.
FAKEROOT_SCRIPT = $(BUILD_DIR)/_fakeroot.fs
-ROOTFS_DEVICE_TABLE = $(call qstrip,$(BR2_ROOTFS_DEVICE_TABLE))
+FULL_DEVICE_TABLE = $(BUILD_DIR)/_device_table.txt
+ROOTFS_DEVICE_TABLES = $(call qstrip,$(BR2_ROOTFS_DEVICE_TABLE))
define ROOTFS_TARGET_INTERNAL
@@ -46,13 +47,14 @@ $(BINARIES_DIR)/rootfs.$(1): $(ROOTFS_$(2)_DEPENDENCIES)
touch $(BUILD_DIR)/.fakeroot.00000
cat $(BUILD_DIR)/.fakeroot* > $(FAKEROOT_SCRIPT)
echo "chown -R 0:0 $(TARGET_DIR)" >> $(FAKEROOT_SCRIPT)
-ifneq ($(ROOTFS_DEVICE_TABLE),)
- echo "$(HOST_DIR)/usr/bin/makedevs -d $(ROOTFS_DEVICE_TABLE) $(TARGET_DIR)" >> $(FAKEROOT_SCRIPT)
+ifneq ($(ROOTFS_DEVICE_TABLES),)
+ cat $(ROOTFS_DEVICE_TABLES) > $(FULL_DEVICE_TABLE)
+ echo "$(HOST_DIR)/usr/bin/makedevs -d $(FULL_DEVICE_TABLE) $(TARGET_DIR)" >> $(FAKEROOT_SCRIPT)
endif
echo "$(ROOTFS_$(2)_CMD)" >> $(FAKEROOT_SCRIPT)
chmod a+x $(FAKEROOT_SCRIPT)
$(HOST_DIR)/usr/bin/fakeroot -- $(FAKEROOT_SCRIPT)
- - at rm -f $(FAKEROOT_SCRIPT)
+ - at rm -f $(FAKEROOT_SCRIPT) $(FULL_DEVICE_TABLE)
$(foreach hook,$(ROOTFS_$(2)_POST_GEN_HOOKS),$(call $(hook))$(sep))
ifeq ($$(BR2_TARGET_ROOTFS_$(2)_GZIP),y)
gzip -9 -c $$@ > $$@.gz
diff --git a/package/makedevs/README b/package/makedevs/README
new file mode 100644
index 0000000..6c54052
--- /dev/null
+++ b/package/makedevs/README
@@ -0,0 +1,35 @@
+When building a target filesystem, it is desirable to not have to
+become root and then run 'mknod' a thousand times. Using a device
+table you can create device nodes and directories "on the fly".
+
+You can do all sorts of interesting things with a device table file.
+For example, if you want to adjust the permissions on a particular
+file you can just add an entry like:
+
+ /sbin/foobar f 2755 0 0 - - - - -
+
+and (assuming the file /sbin/foobar exists) it will be made setuid
+root (regardless of what its permissions are on the host filesystem.
+
+Furthermore, you can use a single table entry to create a many device
+minors. For example, if I wanted to create /dev/hda and
+/dev/hda[0-15] I could just use the following two table entries:
+
+ /dev/hda b 640 0 0 3 0 0 0 -
+ /dev/hda b 640 0 0 3 1 1 1 15
+
+Device table entries take the form of:
+
+<name> <type> <mode> <uid> <gid> <major> <minor> <start> <inc> <count>
+
+where name is the file name, type can be one of:
+
+ f A regular file
+ d Directory
+ c Character special device file
+ b Block special device file
+ p Fifo (named pipe)
+
+uid is the user id for the target file, gid is the group id for the
+target file. The rest of the entries (major, minor, etc) apply only
+to device special files.
diff --git a/target/generic/device_table.txt b/target/generic/device_table.txt
index 38fe1e8..12f35b2 100644
--- a/target/generic/device_table.txt
+++ b/target/generic/device_table.txt
@@ -1,44 +1,15 @@
-# When building a target filesystem, it is desirable to not have to
-# become root and then run 'mknod' a thousand times. Using a device
-# table you can create device nodes and directories "on the fly".
+# See package/makedevs/README for details
#
-# This is a sample device table file for use with genext2fs. You can
-# do all sorts of interesting things with a device table file. For
-# example, if you want to adjust the permissions on a particular file
-# you can just add an entry like:
-# /sbin/foobar f 2755 0 0 - - - - -
-# and (assuming the file /sbin/foobar exists) it will be made setuid
-# root (regardless of what its permissions are on the host filesystem.
-# Furthermore, you can use a single table entry to create a many device
-# minors. For example, if I wanted to create /dev/hda and /dev/hda[0-15]
-# I could just use the following two table entries:
-# /dev/hda b 640 0 0 3 0 0 0 -
-# /dev/hda b 640 0 0 3 1 1 1 15
-#
-# Device table entries take the form of:
-# <name> <type> <mode> <uid> <gid> <major> <minor> <start> <inc> <count>
-# where name is the file name, type can be one of:
-# f A regular file
-# d Directory
-# c Character special device file
-# b Block special device file
-# p Fifo (named pipe)
-# uid is the user id for the target file, gid is the group id for the
-# target file. The rest of the entries (major, minor, etc) apply only
-# to device special files.
-
-# Have fun
-# -Erik Andersen <andersen@codepoet.org>
+# This device table is used to assign proper ownership and permissions
+# on various files. It doesn't create any device file, as it is used
+# in both static device configurations (where /dev/ is static) and in
+# dynamic configurations (where devtmpfs, mdev or udev are used).
#
-
-#<name> <type> <mode> <uid> <gid> <major> <minor> <start> <inc> <count>
-/dev d 755 0 0 - - - - -
-/dev/pts d 755 0 0 - - - - -
-/dev/shm d 755 0 0 - - - - -
-/tmp d 1777 0 0 - - - - -
-/etc d 755 0 0 - - - - -
-/home/default d 2755 1000 1000 - - - - -
-#<name> <type> <mode> <uid> <gid> <major> <minor> <start> <inc> <count>
+# <name> <type> <mode> <uid> <gid> <major> <minor> <start> <inc> <count>
+/dev d 755 0 0 - - - - -
+/tmp d 1777 0 0 - - - - -
+/etc d 755 0 0 - - - - -
+/home/default d 2755 1000 1000 - - - - -
/bin/busybox f 4755 0 0 - - - - -
/etc/shadow f 600 0 0 - - - - -
/etc/passwd f 644 0 0 - - - - -
@@ -48,140 +19,4 @@
/etc/network/if-post-down.d d 755 0 0 - - - - -
/usr/share/udhcpc/default.script f 755 0 0 - - - - -
# uncomment this to allow starting x as non-root
-#/usr/X11R6/bin/Xfbdev f 4755 0 0 - - - - -
-# Normal system devices
-/dev/mem c 640 0 0 1 1 0 0 -
-/dev/kmem c 640 0 0 1 2 0 0 -
-/dev/null c 666 0 0 1 3 0 0 -
-/dev/zero c 666 0 0 1 5 0 0 -
-/dev/random c 666 0 0 1 8 0 0 -
-/dev/urandom c 666 0 0 1 9 0 0 -
-/dev/ram b 640 0 0 1 1 0 0 -
-/dev/ram b 640 0 0 1 0 0 1 4
-/dev/loop b 640 0 0 7 0 0 1 2
-/dev/rtc c 640 0 0 10 135 - - -
-/dev/console c 666 0 0 5 1 - - -
-/dev/tty c 666 0 0 5 0 - - -
-/dev/tty c 666 0 0 4 0 0 1 8
-/dev/ttyp c 666 0 0 3 0 0 1 10
-/dev/ptyp c 666 0 0 2 0 0 1 10
-/dev/ptmx c 666 0 0 5 2 - - -
-/dev/ttyP c 666 0 0 57 0 0 1 4
-/dev/ttyS c 666 0 0 4 64 0 1 4
-/dev/fb c 640 0 5 29 0 0 1 4
-#/dev/ttySA c 666 0 0 204 5 0 1 3
-/dev/psaux c 666 0 0 10 1 0 0 -
-#/dev/ppp c 666 0 0 108 0 - - -
-/dev/ttyAM c 666 0 0 204 16 0 1 3
-/dev/ttyCPM c 666 0 0 204 46 0 1 4
-/dev/ttyAMA c 666 0 0 204 64 0 1 4
-/dev/ttySAC c 666 0 0 204 64 0 1 4
-/dev/ttySC c 666 0 0 204 8 0 1 6
-/dev/ttyPSC c 666 0 0 204 148 0 1 4
-/dev/ttyUL c 666 0 0 204 187 0 1 4
-/dev/ttymxc c 666 0 0 207 16 0 1 3
-
-# Input stuff
-/dev/input d 755 0 0 - - - - -
-/dev/input/mice c 640 0 0 13 63 0 0 -
-/dev/input/mouse c 660 0 0 13 32 0 1 4
-/dev/input/event c 660 0 0 13 64 0 1 4
-#/dev/input/js c 660 0 0 13 0 0 1 4
-
-
-# MTD stuff
-/dev/mtd c 640 0 0 90 0 0 2 4
-/dev/mtdblock b 640 0 0 31 0 0 1 4
-
-#Tun/tap driver
-/dev/net d 755 0 0 - - - - -
-/dev/net/tun c 660 0 0 10 200 - - -
-
-# Audio stuff
-#/dev/audio c 666 0 29 14 4 - - -
-#/dev/audio1 c 666 0 29 14 20 - - -
-#/dev/dsp c 666 0 29 14 3 - - -
-#/dev/dsp1 c 666 0 29 14 19 - - -
-#/dev/sndstat c 666 0 29 14 6 - - -
-
-# User-mode Linux stuff
-#/dev/ubda b 640 0 0 98 0 0 0 -
-#/dev/ubda b 640 0 0 98 1 1 1 15
-
-# IDE Devices
-/dev/hda b 640 0 0 3 0 0 0 -
-/dev/hda b 640 0 0 3 1 1 1 15
-/dev/hdb b 640 0 0 3 64 0 0 -
-/dev/hdb b 640 0 0 3 65 1 1 15
-#/dev/hdc b 640 0 0 22 0 0 0 -
-#/dev/hdc b 640 0 0 22 1 1 1 15
-#/dev/hdd b 640 0 0 22 64 0 0 -
-#/dev/hdd b 640 0 0 22 65 1 1 15
-#/dev/hde b 640 0 0 33 0 0 0 -
-#/dev/hde b 640 0 0 33 1 1 1 15
-#/dev/hdf b 640 0 0 33 64 0 0 -
-#/dev/hdf b 640 0 0 33 65 1 1 15
-#/dev/hdg b 640 0 0 34 0 0 0 -
-#/dev/hdg b 640 0 0 34 1 1 1 15
-#/dev/hdh b 640 0 0 34 64 0 0 -
-#/dev/hdh b 640 0 0 34 65 1 1 15
-
-# SCSI Devices
-/dev/sda b 640 0 0 8 0 0 0 -
-/dev/sda b 640 0 0 8 1 1 1 15
-/dev/sdb b 640 0 0 8 16 0 0 -
-/dev/sdb b 640 0 0 8 17 1 1 15
-#/dev/sdc b 640 0 0 8 32 0 0 -
-#/dev/sdc b 640 0 0 8 33 1 1 15
-#/dev/sdd b 640 0 0 8 48 0 0 -
-#/dev/sdd b 640 0 0 8 49 1 1 15
-#/dev/sde b 640 0 0 8 64 0 0 -
-#/dev/sde b 640 0 0 8 65 1 1 15
-#/dev/sdf b 640 0 0 8 80 0 0 -
-#/dev/sdf b 640 0 0 8 81 1 1 15
-#/dev/sdg b 640 0 0 8 96 0 0 -
-#/dev/sdg b 640 0 0 8 97 1 1 15
-#/dev/sdh b 640 0 0 8 112 0 0 -
-#/dev/sdh b 640 0 0 8 113 1 1 15
-#/dev/sg c 640 0 0 21 0 0 1 15
-#/dev/scd b 640 0 0 11 0 0 1 15
-#/dev/st c 640 0 0 9 0 0 1 8
-#/dev/nst c 640 0 0 9 128 0 1 8
-#/dev/st c 640 0 0 9 32 1 1 4
-#/dev/st c 640 0 0 9 64 1 1 4
-#/dev/st c 640 0 0 9 96 1 1 4
-
-# USB block devices (ub driver)
-/dev/uba b 640 0 0 180 0 0 0 -
-/dev/uba b 640 0 0 180 1 1 1 6
-/dev/ubb b 640 0 0 180 8 0 0 -
-/dev/ubb b 640 0 0 180 65 1 1 6
-
-# Floppy disk devices
-#/dev/fd b 640 0 0 2 0 0 1 2
-#/dev/fd0d360 b 640 0 0 2 4 0 0 -
-#/dev/fd1d360 b 640 0 0 2 5 0 0 -
-#/dev/fd0h1200 b 640 0 0 2 8 0 0 -
-#/dev/fd1h1200 b 640 0 0 2 9 0 0 -
-#/dev/fd0u1440 b 640 0 0 2 28 0 0 -
-#/dev/fd1u1440 b 640 0 0 2 29 0 0 -
-#/dev/fd0u2880 b 640 0 0 2 32 0 0 -
-#/dev/fd1u2880 b 640 0 0 2 33 0 0 -
-
-# All the proprietary cdrom devices in the world
-#/dev/aztcd b 640 0 0 29 0 0 0 -
-#/dev/bpcd b 640 0 0 41 0 0 0 -
-#/dev/capi20 c 640 0 0 68 0 0 1 2
-#/dev/cdu31a b 640 0 0 15 0 0 0 -
-#/dev/cdu535 b 640 0 0 24 0 0 0 -
-#/dev/cm206cd b 640 0 0 32 0 0 0 -
-#/dev/sjcd b 640 0 0 18 0 0 0 -
-#/dev/sonycd b 640 0 0 15 0 0 0 -
-#/dev/gscd b 640 0 0 16 0 0 0 -
-#/dev/sbpcd b 640 0 0 25 0 0 0 -
-#/dev/sbpcd b 640 0 0 25 0 0 1 4
-#/dev/mcd b 640 0 0 23 0 0 0 -
-#/dev/optcd b 640 0 0 17 0 0 0 -
-
-# I2C device nodes
-/dev/i2c- c 666 0 0 89 0 0 1 4
+#/usr/X11R6/bin/Xfbdev f 4755 0 0 - - - - -
diff --git a/target/generic/device_table_dev.txt b/target/generic/device_table_dev.txt
new file mode 100644
index 0000000..a3d53d4
--- /dev/null
+++ b/target/generic/device_table_dev.txt
@@ -0,0 +1,143 @@
+# See package/makedevs/README for details
+#
+# This device table is used only to create device files when a static
+# device configuration is used (entries in /dev are static).
+#
+# <name> <type> <mode> <uid> <gid> <major> <minor> <start> <inc> <count>
+
+# Normal system devices
+/dev/mem c 640 0 0 1 1 0 0 -
+/dev/kmem c 640 0 0 1 2 0 0 -
+/dev/null c 666 0 0 1 3 0 0 -
+/dev/zero c 666 0 0 1 5 0 0 -
+/dev/random c 666 0 0 1 8 0 0 -
+/dev/urandom c 666 0 0 1 9 0 0 -
+/dev/ram b 640 0 0 1 1 0 0 -
+/dev/ram b 640 0 0 1 0 0 1 4
+/dev/loop b 640 0 0 7 0 0 1 2
+/dev/rtc c 640 0 0 10 135 - - -
+/dev/console c 666 0 0 5 1 - - -
+/dev/tty c 666 0 0 5 0 - - -
+/dev/tty c 666 0 0 4 0 0 1 8
+/dev/ttyp c 666 0 0 3 0 0 1 10
+/dev/ptyp c 666 0 0 2 0 0 1 10
+/dev/ptmx c 666 0 0 5 2 - - -
+/dev/ttyP c 666 0 0 57 0 0 1 4
+/dev/ttyS c 666 0 0 4 64 0 1 4
+/dev/fb c 640 0 5 29 0 0 1 4
+#/dev/ttySA c 666 0 0 204 5 0 1 3
+/dev/psaux c 666 0 0 10 1 0 0 -
+#/dev/ppp c 666 0 0 108 0 - - -
+/dev/ttyAM c 666 0 0 204 16 0 1 3
+/dev/ttyCPM c 666 0 0 204 46 0 1 4
+/dev/ttyAMA c 666 0 0 204 64 0 1 4
+/dev/ttySAC c 666 0 0 204 64 0 1 4
+/dev/ttySC c 666 0 0 204 8 0 1 6
+/dev/ttyPSC c 666 0 0 204 148 0 1 4
+/dev/ttyUL c 666 0 0 204 187 0 1 4
+/dev/ttymxc c 666 0 0 207 16 0 1 3
+
+# Input stuff
+/dev/input d 755 0 0 - - - - -
+/dev/input/mice c 640 0 0 13 63 0 0 -
+/dev/input/mouse c 660 0 0 13 32 0 1 4
+/dev/input/event c 660 0 0 13 64 0 1 4
+#/dev/input/js c 660 0 0 13 0 0 1 4
+
+
+# MTD stuff
+/dev/mtd c 640 0 0 90 0 0 2 4
+/dev/mtdblock b 640 0 0 31 0 0 1 4
+
+#Tun/tap driver
+/dev/net d 755 0 0 - - - - -
+/dev/net/tun c 660 0 0 10 200 - - -
+
+# Audio stuff
+#/dev/audio c 666 0 29 14 4 - - -
+#/dev/audio1 c 666 0 29 14 20 - - -
+#/dev/dsp c 666 0 29 14 3 - - -
+#/dev/dsp1 c 666 0 29 14 19 - - -
+#/dev/sndstat c 666 0 29 14 6 - - -
+
+# User-mode Linux stuff
+#/dev/ubda b 640 0 0 98 0 0 0 -
+#/dev/ubda b 640 0 0 98 1 1 1 15
+
+# IDE Devices
+/dev/hda b 640 0 0 3 0 0 0 -
+/dev/hda b 640 0 0 3 1 1 1 15
+/dev/hdb b 640 0 0 3 64 0 0 -
+/dev/hdb b 640 0 0 3 65 1 1 15
+#/dev/hdc b 640 0 0 22 0 0 0 -
+#/dev/hdc b 640 0 0 22 1 1 1 15
+#/dev/hdd b 640 0 0 22 64 0 0 -
+#/dev/hdd b 640 0 0 22 65 1 1 15
+#/dev/hde b 640 0 0 33 0 0 0 -
+#/dev/hde b 640 0 0 33 1 1 1 15
+#/dev/hdf b 640 0 0 33 64 0 0 -
+#/dev/hdf b 640 0 0 33 65 1 1 15
+#/dev/hdg b 640 0 0 34 0 0 0 -
+#/dev/hdg b 640 0 0 34 1 1 1 15
+#/dev/hdh b 640 0 0 34 64 0 0 -
+#/dev/hdh b 640 0 0 34 65 1 1 15
+
+# SCSI Devices
+/dev/sda b 640 0 0 8 0 0 0 -
+/dev/sda b 640 0 0 8 1 1 1 15
+/dev/sdb b 640 0 0 8 16 0 0 -
+/dev/sdb b 640 0 0 8 17 1 1 15
+#/dev/sdc b 640 0 0 8 32 0 0 -
+#/dev/sdc b 640 0 0 8 33 1 1 15
+#/dev/sdd b 640 0 0 8 48 0 0 -
+#/dev/sdd b 640 0 0 8 49 1 1 15
+#/dev/sde b 640 0 0 8 64 0 0 -
+#/dev/sde b 640 0 0 8 65 1 1 15
+#/dev/sdf b 640 0 0 8 80 0 0 -
+#/dev/sdf b 640 0 0 8 81 1 1 15
+#/dev/sdg b 640 0 0 8 96 0 0 -
+#/dev/sdg b 640 0 0 8 97 1 1 15
+#/dev/sdh b 640 0 0 8 112 0 0 -
+#/dev/sdh b 640 0 0 8 113 1 1 15
+#/dev/sg c 640 0 0 21 0 0 1 15
+#/dev/scd b 640 0 0 11 0 0 1 15
+#/dev/st c 640 0 0 9 0 0 1 8
+#/dev/nst c 640 0 0 9 128 0 1 8
+#/dev/st c 640 0 0 9 32 1 1 4
+#/dev/st c 640 0 0 9 64 1 1 4
+#/dev/st c 640 0 0 9 96 1 1 4
+
+# USB block devices (ub driver)
+/dev/uba b 640 0 0 180 0 0 0 -
+/dev/uba b 640 0 0 180 1 1 1 6
+/dev/ubb b 640 0 0 180 8 0 0 -
+/dev/ubb b 640 0 0 180 65 1 1 6
+
+# Floppy disk devices
+#/dev/fd b 640 0 0 2 0 0 1 2
+#/dev/fd0d360 b 640 0 0 2 4 0 0 -
+#/dev/fd1d360 b 640 0 0 2 5 0 0 -
+#/dev/fd0h1200 b 640 0 0 2 8 0 0 -
+#/dev/fd1h1200 b 640 0 0 2 9 0 0 -
+#/dev/fd0u1440 b 640 0 0 2 28 0 0 -
+#/dev/fd1u1440 b 640 0 0 2 29 0 0 -
+#/dev/fd0u2880 b 640 0 0 2 32 0 0 -
+#/dev/fd1u2880 b 640 0 0 2 33 0 0 -
+
+# All the proprietary cdrom devices in the world
+#/dev/aztcd b 640 0 0 29 0 0 0 -
+#/dev/bpcd b 640 0 0 41 0 0 0 -
+#/dev/capi20 c 640 0 0 68 0 0 1 2
+#/dev/cdu31a b 640 0 0 15 0 0 0 -
+#/dev/cdu535 b 640 0 0 24 0 0 0 -
+#/dev/cm206cd b 640 0 0 32 0 0 0 -
+#/dev/sjcd b 640 0 0 18 0 0 0 -
+#/dev/sonycd b 640 0 0 15 0 0 0 -
+#/dev/gscd b 640 0 0 16 0 0 0 -
+#/dev/sbpcd b 640 0 0 25 0 0 0 -
+#/dev/sbpcd b 640 0 0 25 0 0 1 4
+#/dev/mcd b 640 0 0 23 0 0 0 -
+#/dev/optcd b 640 0 0 17 0 0 0 -
+
+# I2C device nodes
+/dev/i2c- c 666 0 0 89 0 0 1 4
--
1.7.3.4
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [Buildroot] [git commit] Allow several device tables and split in two parts our device table
2011-05-10 21:43 [Buildroot] [git commit] Allow several device tables and split in two parts our device table Thomas Petazzoni
@ 2011-05-17 7:04 ` Thomas Petazzoni
2011-05-17 8:43 ` Peter Korsgaard
0 siblings, 1 reply; 5+ messages in thread
From: Thomas Petazzoni @ 2011-05-17 7:04 UTC (permalink / raw)
To: buildroot
Hello,
On Tue, 10 May 2011 23:43:00 +0200
Thomas Petazzoni <thomas.petazzoni@free-electrons.com> wrote:
> config BR2_ROOTFS_DEVICE_TABLE
> - string "Path to the device table"
> - depends on BR2_ROOTFS_DEVICE_CREATION_STATIC
> - default "target/generic/device_table.txt"
> + string "Path to the device tables"
> + default "target/generic/device_table.txt target/generic/device_table_dev.txt" \
> + if BR2_ROOTFS_DEVICE_CREATION_STATIC
> + default "target/generic/device_table.txt" \
> + if (BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_MDEV || \
> + BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_UDEV || \
> + BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_DEVTMPFS)
> help
> - Specify the location of a device table, that will be passed
> - to the makedevs utility to create all the special device
> - files in the target filesystem.
> + Specify a space-separated list of device table locations,
> + that will be passed to the makedevs utility to create all
> + the special device files and assign correct owners and
> + permissions on various files in the target filesystem.
> +
> + See package/makedevs/README for details on the usage and
> + syntax of these files.
I know it's my stuff, but this doesn't work that well. Once you have
choosen one particular solution, if you switch to another, then the
list of default device table isn't updated accordingly. Of course, we
want to preserve the user choice for the list of device tables, but I'm
quite sure we'll have some support requests from people doing :
* A build based on a dynamic /dev
* Change configuration to static /dev
* Build
* See that nothing works, because /dev is empty
But I don't know what we can do against this. Should we instead add an
option to makedevs to instruct makedevs to skip entries in /dev ? This
option could then be used for all dynamic /dev cases, and would work
even if the device table contains entries for /dev ? Or should we keep
it as it is ?
Regards,
Thomas
--
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Buildroot] [git commit] Allow several device tables and split in two parts our device table
2011-05-17 7:04 ` Thomas Petazzoni
@ 2011-05-17 8:43 ` Peter Korsgaard
2011-05-17 8:55 ` Thomas Petazzoni
0 siblings, 1 reply; 5+ messages in thread
From: Peter Korsgaard @ 2011-05-17 8:43 UTC (permalink / raw)
To: buildroot
>>>>> "Thomas" == Thomas Petazzoni <thomas.petazzoni@free-electrons.com> writes:
Hi,
Thomas> I know it's my stuff, but this doesn't work that well. Once you
Thomas> have choosen one particular solution, if you switch to another,
Thomas> then the list of default device table isn't updated
Thomas> accordingly. Of course, we want to preserve the user choice for
Thomas> the list of device tables, but I'm quite sure we'll have some
Thomas> support requests from people doing :
Thomas> * A build based on a dynamic /dev
Thomas> * Change configuration to static /dev
Thomas> * Build
Thomas> * See that nothing works, because /dev is empty
Yes, I know - It's the same kind of issues we have with busybox/uclibc
configuration file if you change version.
Thomas> But I don't know what we can do against this. Should we instead add an
Thomas> option to makedevs to instruct makedevs to skip entries in /dev ? This
Thomas> option could then be used for all dynamic /dev cases, and would work
Thomas> even if the device table contains entries for /dev ? Or should we keep
Thomas> it as it is ?
Alternatively we can split it up and provide an option for the base
device table (which will default to target/generic/device_table.txt) and
add an option for static device nodes (which defaults to
target/generic/device_table_dev.txt) and only make that option visible
if static dev is used.
The makefile can then concatenate those options and use them like it is
done today.
--
Bye, Peter Korsgaard
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Buildroot] [git commit] Allow several device tables and split in two parts our device table
2011-05-17 8:43 ` Peter Korsgaard
@ 2011-05-17 8:55 ` Thomas Petazzoni
2011-05-17 9:42 ` Peter Korsgaard
0 siblings, 1 reply; 5+ messages in thread
From: Thomas Petazzoni @ 2011-05-17 8:55 UTC (permalink / raw)
To: buildroot
On Tue, 17 May 2011 10:43:28 +0200
Peter Korsgaard <jacmet@uclibc.org> wrote:
> Thomas> But I don't know what we can do against this. Should we instead add an
> Thomas> option to makedevs to instruct makedevs to skip entries in /dev ? This
> Thomas> option could then be used for all dynamic /dev cases, and would work
> Thomas> even if the device table contains entries for /dev ? Or should we keep
> Thomas> it as it is ?
>
> Alternatively we can split it up and provide an option for the base
> device table (which will default to target/generic/device_table.txt) and
> add an option for static device nodes (which defaults to
> target/generic/device_table_dev.txt) and only make that option visible
> if static dev is used.
>
> The makefile can then concatenate those options and use them like it is
> done today.
Seems like a good idea. The first option shouldn't be named "device
table", but instead "permission table", and the file device_table.txt
could be renamed as well to permission_table.txt.
We should also preserve the fact that those two options can be lists,
so that one can keep the original permission table, and add some more
entries by specifying a second table.
Regards,
Thomas
--
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Buildroot] [git commit] Allow several device tables and split in two parts our device table
2011-05-17 8:55 ` Thomas Petazzoni
@ 2011-05-17 9:42 ` Peter Korsgaard
0 siblings, 0 replies; 5+ messages in thread
From: Peter Korsgaard @ 2011-05-17 9:42 UTC (permalink / raw)
To: buildroot
>>>>> "Thomas" == Thomas Petazzoni <thomas.petazzoni@free-electrons.com> writes:
Hi,
Thomas> Seems like a good idea. The first option shouldn't be named
Thomas> "device table", but instead "permission table", and the file
Thomas> device_table.txt could be renamed as well to
Thomas> permission_table.txt.
Thomas> We should also preserve the fact that those two options can be
Thomas> lists, so that one can keep the original permission table, and
Thomas> add some more entries by specifying a second table.
Sounds good. Care to cook up a patch?
--
Bye, Peter Korsgaard
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2011-05-17 9:42 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
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2011-05-10 21:43 [Buildroot] [git commit] Allow several device tables and split in two parts our device table Thomas Petazzoni
2011-05-17 7:04 ` Thomas Petazzoni
2011-05-17 8:43 ` Peter Korsgaard
2011-05-17 8:55 ` Thomas Petazzoni
2011-05-17 9:42 ` Peter Korsgaard
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