Date: Thu, 22 Dec 2005 22:09:15 -0800 From: "Darren Pilgrim" <darren.pilgrim@bitfreak.org> To: <freebsd-rc@freebsd.org> Subject: /etc/rc.d/devfs modification to allow wildcard device names in /etc/devfs.conf Message-ID: <000d01c60787$6a431b40$652a15ac@smiley>
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I recently needed to change the default permissions of some of the "dial
out" serial devices on a system for use with NUT (sysutils/nut port). =
For
the sake of efficiency, I wanted to use a wildcard expression only to =
find
out that /etc/rc.d/devfs doesn't grok sh-style filename globbing. So I
modified the script. I wrapped each sub-procedure in the case structure
with a for...done that expands the device string into a list for =
iteration.
The result is that I can put lines like the following in =
/etc/devfs.conf:
own cuad[1,2]* nut:nut
perm cuad[1,2]* 0660
The non-wildcard equivalent would be:
own cuad1 nut:nut
own cuad1.init nut:nut
own cuad1.lock nut:nut
own cuad2 nut:nut
own cuad2.init nut:nut
own cuad2.lock nut:nut
perm cuad1 0660
perm cuad1.init 0660
perm cuad1.lock 0660
perm cuad2 0660
perm cuad2.init 0660
perm cuad2.lock 0660
I wrote two versions of the modification, one takes the device =
expression
literally (the _literal.patch file), the other explicitly expands it =
with ls
(the _backticked_ls.patch file). Both appear to work fine, but IMO the
latter seems a safer approach. The modifications and testing were done =
on a
current RELENG_6_0 box where /etc/rc.d/devfs is v1.10. The v1.11 in =
-HEAD
is effectively identical, so it should apply cleanly to that version as
well.
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name="etc_rc.d_devfs_literal.patch"
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filename="etc_rc.d_devfs_literal.patch"
--- /usr/src/etc/rc.d/devfs Fri Oct 22 23:50:50 2004=0A=
+++ /etc/rc.d/devfs Wed Dec 21 01:16:24 2005=0A=
@@ -41,19 +41,25 @@=0A=
{=0A=
if [ -r /etc/devfs.conf ]; then=0A=
cd /dev=0A=
- while read action device parameter; do=0A=
+ while read action devicelist parameter; do=0A=
case "${action}" in=0A=
- l*) if [ -c ${device} -a ! -e ${parameter} ]; then=0A=
- ln -fs ${device} ${parameter}=0A=
- fi=0A=
+ l*) for device in ${devicelist}; do=0A=
+ if [ -c ${device} -a ! -e ${parameter} ]; then=0A=
+ ln -fs ${device} ${parameter}=0A=
+ fi=0A=
+ done=0A=
;;=0A=
- o*) if [ -c ${device} ]; then=0A=
- chown ${parameter} ${device}=0A=
- fi=0A=
+ o*) for device in ${devicelist}; do=0A=
+ if [ -c ${device} ]; then=0A=
+ chown ${parameter} ${device}=0A=
+ fi=0A=
+ done=0A=
;;=0A=
- p*) if [ -c ${device} ]; then=0A=
- chmod ${parameter} ${device}=0A=
- fi=0A=
+ p*) for device in ${devicelist}; do=0A=
+ if [ -c ${device} ]; then=0A=
+ chmod ${parameter} ${device}=0A=
+ fi=0A=
+ done=0A=
;;=0A=
esac=0A=
done < /etc/devfs.conf=0A=
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name="etc_rc.d_devfs_backticked_ls.patch"
Content-Transfer-Encoding: quoted-printable
Content-Disposition: attachment; filename="etc_rc.d_devfs_backticked_ls.patch"
--- /usr/src/etc/rc.d/devfs Fri Oct 22 23:50:50 2004=0A=
+++ /etc/rc.d/devfs Thu Dec 22 21:33:50 2005=0A=
@@ -41,19 +41,25 @@=0A=
{=0A=
if [ -r /etc/devfs.conf ]; then=0A=
cd /dev=0A=
- while read action device parameter; do=0A=
+ while read action devicelist parameter; do=0A=
case "${action}" in=0A=
- l*) if [ -c ${device} -a ! -e ${parameter} ]; then=0A=
- ln -fs ${device} ${parameter}=0A=
- fi=0A=
+ l*) for device in `ls ${devicelist}`; do=0A=
+ if [ -c ${device} -a ! -e ${parameter} ]; then=0A=
+ ln -fs ${device} ${parameter}=0A=
+ fi=0A=
+ done=0A=
;;=0A=
- o*) if [ -c ${device} ]; then=0A=
- chown ${parameter} ${device}=0A=
- fi=0A=
+ o*) for device in `ls ${devicelist}`; do=0A=
+ if [ -c ${device} ]; then=0A=
+ chown ${parameter} ${device}=0A=
+ fi=0A=
+ done=0A=
;;=0A=
- p*) if [ -c ${device} ]; then=0A=
- chmod ${parameter} ${device}=0A=
- fi=0A=
+ p*) for device in `ls ${devicelist}`; do=0A=
+ if [ -c ${device} ]; then=0A=
+ chmod ${parameter} ${device}=0A=
+ fi=0A=
+ done=0A=
;;=0A=
esac=0A=
done < /etc/devfs.conf=0A=
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