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add system information gathering, in cfengine speek this will create our hard classes
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add system information gathering, in cfengine speek this will create our hard classes
master
1 changed files with 315 additions and 0 deletions
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#!/bin/dash |
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## |
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# This is a first test what static informations I can gather from a |
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# system. The minimal requirement are the IP addresses because |
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# on these I build up my classes. |
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# The system type is also important...we might need to be running |
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# on variuous UNIX flavours. (But for now we focus on various linux |
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# flavours and maybe FreeBSD. |
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# |
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# Function calculates number of bit in a netmask |
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# |
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mask2cidr() { |
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local NBITS=0 |
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local OLDIFS="${IFS}" |
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IFS=. |
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for DEC in $1 |
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do |
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case ${DEC} in |
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255) NBITS=$((NBITS+8));; |
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254) NBITS=$((NBITS+7));; |
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252) NBITS=$((NBITS+6));; |
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248) NBITS=$((NBITS+5));; |
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240) NBITS=$((NBITS+4));; |
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224) NBITS=$((NBITS+3));; |
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192) NBITS=$((NBITS+2));; |
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128) NBITS=$((NBITS+1));; |
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0);; |
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*) NBITS=0; IFS="${OLDIFS}"; return 1 |
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esac |
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done |
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IFS="${OLDIFS}" |
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${ECHO} "${NBITS}" |
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} |
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cidr2mask() { |
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local MASK="" |
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local FULL_OCTETS=$((${1}/8)) |
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local PARTIAL_OCTET=$((${1}%8)) |
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for I in 0 1 2 3 |
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do |
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if [ ${I} -lt ${FULL_OCTETS} ] |
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then |
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MASK="${MASK}255" |
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elif [ ${I} -eq ${FULL_OCTETS} ] |
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then |
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MASK="${MASK}$((256-(1<<(8-${PARTIAL_OCTET}))))" |
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else |
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MASK="${MASK}0" |
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fi |
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${TEST} ${I} -lt 3 && MASK="${MASK}." |
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done |
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${ECHO} ${MASK} |
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} |
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## |
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# retrieve interfaces. I prefer using ip if it is |
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# available, else I fallback to ifconfig... don't know |
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# how to retrieve this information on other systems. |
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# |
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get_if_data() { |
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if [ ${IP} ] |
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then |
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eval $(${IP} -o link | ${AWK} '{ |
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sub(/:/,"",$1); |
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no=$1; |
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sub(/:/,"",$2); |
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name=$2; |
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for (i=3; i<NF; i++) { |
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if ($i == "state") { |
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i++; state=$i |
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} |
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if ($i ~ /link/) { |
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i++; mac=$i; |
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classes=classes mac " " |
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} |
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} |
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print "IF" no "_NAME=" name ";IF" no "_STATE=" state ";IF" no "_MAC=" mac ";"; |
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if ("UP" == state) classes=classes mac " " |
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} |
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BEGIN { |
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classes="" |
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} |
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END { |
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print "CLASSES=\"${CLASSES}" classes " \";"; |
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print "NINTERFACES=" FNR ";" |
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}') |
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eval $(${IP} -o addr | ${AWK} '{ |
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sub(/:/,"",$1); |
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no=$1; |
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if ($3 == "inet") { |
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sub(/[\/%].*/,"",$4); |
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print "IF" no "_IPV4=\"${IF" no "_IPV4}" $4 " \";"; |
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classes=classes $4 " " |
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} |
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if ($3 == "inet6") { |
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sub(/[\/%].*/,"",$4); |
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print "IF" no "_IPV6=\"${IF" no "_IPV6}" $4 " \";"; |
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classes=classes $4 " " |
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} |
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} |
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BEGIN { |
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classes="" |
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} |
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END { |
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print "CLASSES=\"${CLASSES}" classes " \";" |
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}') |
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else |
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if [ ${IFCONFIG} ] |
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then |
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#eval $(${IFCONFIG} -a | ${AWK} '{ |
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eval $(ifconfig -a | awk ' |
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/ether/ { mac=$2 } |
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/inet / { ipv4=ipv4 $2 " " } |
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/inet6/ { ipv6=ipv6 $2 " " } |
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/^[^ \t]/ { |
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if ("" != ipv4 || "" != ipv6) state="UP"; else state="DOWN"; |
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if ("" != name) { |
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print "IF" no "_NAME=" name ";IF" no "_STATE=" state ";IF" no "_MAC=" mac ";" \ |
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"IF" no "_IPV4=\"${IF" no "_IPV4}" ipv4 " \";" \ |
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"IF" no "_IPV6=\"${IF" no "_IPV6}" ipv6 " \";"; |
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no++; |
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} |
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ipv4=ipv6=""; |
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sub(/:/,"",$1); |
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name=$1 |
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} |
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BEGIN { |
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no=1; |
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} |
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END { |
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if ("" != ipv4 || "" != ipv6) state="UP"; else state="DOWN"; |
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print "IF" no "_NAME=" name ";IF" no "_STATE=" state ";IF" no "_MAC=" mac ";" \ |
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"IF" no "_IPV4=\"${IF" no "_IPV4}" ipv4 " \";" \ |
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"IF" no "_IPV6=\"${IF" no "_IPV6}" ipv6 " \";"; |
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print "NINTERFACES=" no |
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}') |
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else |
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${LOGGER} -p local0.warn 'Found no way to retrieve interface information.' |
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fi |
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fi |
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} |
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## |
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# start guessing the system type |
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# 1. get informations via uname |
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# |
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get_host_info() { |
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OS="$(${UNAME} -o)" |
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KERNEL="$(${UNAME} -s)" |
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VERSION="$(${UNAME} -r)" |
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PLATFORM="$(${UNAME} -m)" |
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HOSTNAME="$(${UNAME} -n)" |
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CLASSES="$(${ECHO} -e "${OS}\n${KERNEL}\n${VERSION}\n${PLATFORM}\n${HOSTNAME}" |\ |
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${SORT} -u | ${TR} "\n" " ")" |
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} |
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## |
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# if we are on a linux try to figure out wich distribution we are |
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# running. |
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# First look what kind of realease file we have: |
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# |
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# 00 01 - Novell SuSE ---> /etc/SuSE-release |
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# 00 02 - Red Hat ---> /etc/redhat-release, /etc/redhat_version |
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# 00 04 - Fedora ---> /etc/fedora-release |
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# 00 08 - Slackware ---> /etc/slackware-release, /etc/slackware-version |
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# 00 10 - Debian ---> /etc/debian_release, /etc/debian_version |
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# 00 20 - Mandrake ---> /etc/mandrake-release |
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# 00 40 - Yellow dog ---> /etc/yellowdog-release |
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# 00 80 - Sun JDS ---> /etc/sun-release |
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# 01 00 - Solaris/Sparc ---> /etc/release |
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# 02 00 - Gentoo ---> /etc/gentoo-release |
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# |
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# Here I follow a pessimistic way because I prefere to have no |
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# identification at all over a wrong one...so I check for all these files. |
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# If I can't find any or find multiple of them I assume this system |
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# as unidentified. Anyway when I found one I still check the content... |
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# Here I need some help as I don't know the valid content of these files. |
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# For now I assume that at least the name of the distribution is in |
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# the file. |
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# |
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get_dist_info() { |
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if [ -z "${KERNEL}" ] |
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then |
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get_host_info |
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fi |
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if [ "Linux" = "${KERNEL}" ] |
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then |
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local SUSE=1 |
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local REDHAT=2 |
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local FEDORA=4 |
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local SLACKWARE=8 |
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local DEBIAN=16 |
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local MANDRAKE=32 |
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local YELLOWDOG=64 |
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local SUNJDS=128 |
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local GENTOO=256 |
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local SOLARIS=512 |
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local LAST=${SOLARIS} |
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local CHK=$((SUSE|REDHAT|FEDORA|SLACKWARE|DEBIAN|MANDRAKE|\ |
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YELLOWDOG|SUNJDS|GENTOO|SOLARIS)) |
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eval local FILES_${SUSE}=\'/etc/SuSE-release\' |
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eval local FILES_${REDHAT}=\'/etc/redhat-release /etc/redhat_version\' |
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eval local FILES_${FEDORA}=\'/etc/fedora-release\' |
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eval local FILES_${SLACKWARE}=\'/etc/slackware-release /etc/slackware-version\' |
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eval local FILES_${DEBIAN}=\'/etc/debian_release /etc/debian_version\' |
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eval local FILES_${MANDRAKE}=\'/etc/mandrake-release\' |
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eval local FILES_${YELLOWDOG}=\'/etc/yellowdog-release\' |
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eval local FILES_${SUNJDS}=\'/etc/sun-release\' |
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eval local FILES_${GENTOO}=\'/etc/gentoo-release\' |
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eval local FILES_${SOLARIS}=\'/etc/release\' |
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local CUR=1 |
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while [ ${CUR} -le ${LAST} ] |
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do |
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local DIR |
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eval local FILES=\"\${FILES_${CUR}}\" |
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for DIR in ${FILES} |
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do |
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${TEST} -f ${DIR} || CHK=$((CHK&~CUR)) |
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done |
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CUR=$((CUR*2)) |
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done |
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DIST="Unknown" |
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${TEST} ${CHK} -eq ${SUSE} && DIST="Suse" |
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${TEST} ${CHK} -eq ${REDHAT} && DIST="Redhat" |
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${TEST} ${CHK} -eq ${FEDORA} && DIST="Fedora" |
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${TEST} ${CHK} -eq ${SLACKWARE} && DIST="Slakware" |
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${TEST} ${CHK} -eq ${DEBIAN} && DIST="Debian" |
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${TEST} ${CHK} -eq ${MANDRAKE} && DIST="Mandrake" |
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${TEST} ${CHK} -eq ${YELLOWDOG} && DIST="Yellowdog" |
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${TEST} ${CHK} -eq ${SUNJDS} && DIST="Sun" |
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${TEST} ${CHK} -eq ${GENTOO} && DIST="Gentoo" |
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${TEST} ${CHK} -eq ${SOLARIS} && DIST="Solaris" |
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if [ 'Unknown' != "${DIST}" ] |
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then |
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eval ${GREP} -iq ${DIST} \${FILES_${CHK}} || DIST="Unknown" |
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fi |
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CLASSES="${CLASSES}${DIST} " |
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else |
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DIST="${OS}" |
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fi |
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} |
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## |
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# Here now starts the usage of the functions defined above. |
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# |
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## |
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# first specify some programs |
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# |
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WHICH="/usr/bin/which" |
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UNAME="$(${WHICH} uname)" |
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TEST="$(${WHICH} test)" |
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GREP="$(${WHICH} grep)" |
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AWK="$(${WHICH} awk)" |
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ECHO="$(${WHICH} echo)" |
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SORT="$(${WHICH} sort)" |
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TR="$(${WHICH} tr)" |
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PRINTF="$(${WHICH} printf)" |
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LOGGER="$(${WHICH} logger)" |
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IP="$(${WHICH} ip)" |
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IFCONFIG="$(${WHICH} ifconfig)" |
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get_dist_info |
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get_if_data |
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## |
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# report everysthing |
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# |
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${PRINTF} "%15s : %s\n" "OS" "${OS}" |
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${PRINTF} "%15s : %s\n" "KERNEL" "${KERNEL}" |
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${PRINTF} "%15s : %s\n" "VERSION" "${VERSION}" |
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${PRINTF} "%15s : %s\n" "PLATFORM" "${PLATFORM}" |
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${PRINTF} "%15s : %s\n" "DIST" "${DIST}" |
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${PRINTF} "%15s : %s\n" "HOSTNAME" "${HOSTNAME}" |
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${PRINTF} "%15s : %s\n" "# INTERFACES" "${NINTERFACES}" |
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NO=1 |
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while [ ${NO} -le ${NINTERFACES:=0} ] |
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do |
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eval printf \"%15s : %s\\\n\" \"IF${NO}_NAME\" \"\${IF${NO}_NAME}\" |
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eval printf \"%15s : %s\\\n\" \"IF${NO}_MAC\" \"\${IF${NO}_MAC}\" |
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eval printf \"%15s : %s\\\n\" \"IF${NO}_STATE\" \"\${IF${NO}_STATE}\" |
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eval printf \"%15s : %s\\\n\" \"IF${NO}_IPV4\" \"\${IF${NO}_IPV4}\" |
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eval printf \"%15s : %s\\\n\" \"IF${NO}_IPV6\" \"\${IF${NO}_IPV6}\" |
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NO=$((NO+1)) |
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done |
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${PRINTF} "%15s : %s\n" "CLASSES" "${CLASSES}" |
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echo |
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echo $(mask2cidr 255.255.128.0) |
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echo $(cidr2mask 17) |
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eval echo \$\(cidr2mask $(mask2cidr 255.255.128.0)\) |
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# vim: set ts=4 sw=4: |
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