On 6/28/2019 10:59 AM, Bruce Dubbs via lfs-dev wrote:
On 6/28/19 10:16 AM, Marty Jack via lfs-dev wrote:
You could consider doing it the way I have been doing it. In my view
the iana-etc package in the book is in unmaintained status.
If you download
https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xml
https://www.iana.org/assignments/protocol-numbers/protocol-numbers.xml
and run a script over them, you get /etc/protocols and
/etc/services. I can provide the script if there is interest in
changing over. I believe the script came from Arch originally.
The latest revision of these files is May 31, 2019.
I would be interested in seeing the script. It looks like what we
have dates back to 2008 although we've seen no issues about missing
updates.
Good call Marty. Seth's script still works on the current protocols file
but it's not as clean as the Arch awk script. Unfortunately, it comments
out the whole of the service-names-port-numbers.txt. Any files from
IANA, other than the xml files, are a mess to work with. I did
eventually get to the output that Marty suggested that way (with the
commented additions below). Services from the .csv took around 80
seconds to process for all the special cases using only sed and was 36
lines long! Fun exercise, but obviously not very efficient. :-) In comes
Marty's suggestion (with a couple of minor modifications):
Per the Arch PKGBUILD at
https://git.archlinux.org/svntogit/packages.git/plain/trunk/PKGBUILD?h=packages/iana-etc
for LFS it would look something like this to get us close to Seth's
original output - I added the commented descriptions, fixed spacing
(field length should be also be 15 for proper alignment in protocols,
not 13), added auto downloading over FTP so that it can run from a cron
job or systemd timer, and finally added local modifications (example
data file below the script, but its just properly formatted lines). Here
is a first take:
===================================/usr/sbin/update-iana-etc===================================
#!/bin/sh
# Begin /usr/sbin/update-iana-etc
# Simple script to update IANA protocols and services files
if [ $# -ne 0 ]; then
echo "usage: update-iana-etc" >&2
exit 2
fi
uid=$(id -u)
if [ "$uid" != 0 ]; then
echo "update-iana-etc: running as non-root user! Exiting..." >&2
exit 0
fi
DOWNLOADED=false
DATE=`date -I`
TEMPDIR=`mktemp -d` &&
cd $TEMPDIR &&
# Protocols
ftp -inv ftp.iana.org << "EOF" &&
user anonymous anonymous
pasv
cd assignments
cd protocol-numbers
get protocol-numbers.xml
bye
EOF
gawk -F"[<>]" '
BEGIN { print "# IANA protocols for LFS\n" }
(/<record/) { v=n="" }
(/<value/) { v=$3 }
(/<name/ && $3!~/ /) { n=$3 }
(/<description/) {d=$3}
(/<\/record/ && n && v!="") { printf "%-15s %3i %-15s\t# %s\n",
tolower(n),v,n,d }
' protocol-numbers.xml > protocols &&
# Services
ftp -inv ftp.iana.org << "EOF" &&
user anonymous anonymous
pasv
cd assignments
cd service-names-port-numbers
get service-names-port-numbers.xml
bye
EOF
gawk -F"[<>]" '
BEGIN { print "# IANA services for LFS\n" }
(/<record/) { n=u=p=c="" }
(/<name/ && !/\(/) { n=$3 }
(/<number/) { u=$3 }
(/<protocol/) { p=$3 }
(/<description/) { d=$3 }
(/Unassigned/ || /Reserved/ || /historic/) { c=1 }
(/<\/record/ && n && u && p && !c) { printf "%-15s %5i/%s\t# %s\n",
n,u,p,d }
' service-names-port-numbers.xml > services &&
echo "Successfully downloaded...." &&
DOWNLOADED=true
# Sanity checking
if [ "${DOWNLOADED}" != "true" ]; then
echo "Somthing went wrong obtaining the upstream files. Exiting..."
exit 3
fi
# Add custom protocols
if [ -f /etc/sysconfig/protocols.add ]; then
cat /etc/sysconfig/protocols.add >> protocols
fi
# Add custom services
if [ -f /etc/sysconfig/services.add ]; then
cat /etc/sysconfig/services.add >> services
fi
# Install them...
mv -v /etc/protocols /etc/protocols-${DATE}
install -vm644 protocols /etc/protocols
mv -v /etc/services /etc/services-${DATE}
install -vm644 services /etc/services
echo "Update complete!"
# Clean up
rm -rf ${TEMPDIR}
# End /usr/sbin/update-iana-etc
===============================================================================================
==================================/etc/sysconfig/services.add==================================
smtps 465/tcp # Simple Mail Transport Protocol over TLS
===============================================================================================
Just a quick (but functional) mock-up using update-ca-certificates as an
example. Can clean it up if this would be good for the book. Would need
to move to chapter 7, after networking configuration (won't work without
/etc/resolv.conf).
--DJ
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