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Diffstat (limited to 'mcon/U/myhostname.U')
| -rw-r--r-- | mcon/U/myhostname.U | 284 |
1 files changed, 284 insertions, 0 deletions
diff --git a/mcon/U/myhostname.U b/mcon/U/myhostname.U new file mode 100644 index 0000000..3e33f70 --- /dev/null +++ b/mcon/U/myhostname.U @@ -0,0 +1,284 @@ +?RCS: $Id$ +?RCS: +?RCS: Copyright (c) 1991-1997, 2004-2006, Raphael Manfredi +?RCS: +?RCS: You may redistribute only under the terms of the Artistic Licence, +?RCS: as specified in the README file that comes with the distribution. +?RCS: You may reuse parts of this distribution only within the terms of +?RCS: that same Artistic Licence; a copy of which may be found at the root +?RCS: of the source tree for dist 4.0. +?RCS: +?RCS: $Log: myhostname.U,v $ +?RCS: Revision 3.0.1.3 1997/02/28 16:15:55 ram +?RCS: patch61: improved hostname lookup by using ypmatch when NIS is used +?RCS: +?RCS: Revision 3.0.1.2 1994/10/29 16:25:43 ram +?RCS: patch36: call ./xenix explicitely instead of relying on PATH +?RCS: patch36: now uses new Tr unit to convert to/from lowercase +?RCS: +?RCS: Revision 3.0.1.1 1994/06/20 07:06:20 ram +?RCS: patch30: now a little more clever for domain name guessing +?RCS: +?RCS: Revision 3.0 1993/08/18 12:09:18 ram +?RCS: Baseline for dist 3.0 netwide release. +?RCS: +?MAKE:myhostname phostname mydomain: contains sed test Myread Oldconfig \ + Guess Loc awk echo sort uniq +usrinc rm hostcat Tr osname +?MAKE: -pick add $@ %< +?S:myhostname (hostname): +?S: This variable contains the eventual value of the MYHOSTNAME symbol, +?S: which is the name of the host the program is going to run on. +?S: The domain is not kept with hostname, but must be gotten from mydomain. +?S: The dot comes with mydomain, and need not be supplied by the program. +?S:. +?S:mydomain: +?S: This variable contains the eventual value of the MYDOMAIN symbol, +?S: which is the domain of the host the program is going to run on. +?S: The domain must be appended to myhostname to form a complete host name. +?S: The dot comes with mydomain, and need not be supplied by the program. +?S:. +?S:phostname: +?S: This variable contains the eventual value of the PHOSTNAME symbol, +?S: which is a command that can be fed to popen() to get the host name. +?S: The program should probably not presume that the domain is or isn't +?S: there already. +?S:. +?C:MYHOSTNAME (HOSTNAME): +?C: This symbol contains name of the host the program is going to run on. +?C: The domain is not kept with hostname, but must be gotten from MYDOMAIN. +?C: The dot comes with MYDOMAIN, and need not be supplied by the program. +?C: If gethostname() or uname() exist, MYHOSTNAME may be ignored. If MYDOMAIN +?C: is not used, MYHOSTNAME will hold the name derived from PHOSTNAME. +?C:. +?C:MYDOMAIN: +?C: This symbol contains the domain of the host the program is going to +?C: run on. The domain must be appended to HOSTNAME to form a complete +?C: host name. The dot comes with MYDOMAIN, and need not be supplied by +?C: the program. If the host name is derived from PHOSTNAME, the domain +?C: may or may not already be there, and the program should check. +?C:. +?H:#define MYHOSTNAME "$myhostname" /**/ +?H:#define MYDOMAIN "$mydomain" /**/ +?H:. +?T:cont i tans tmp_re file +: now get the host name +echo " " +echo "Figuring out host name..." >&4 +case "$myhostname" in +'') cont=true + echo 'Maybe "hostname" will work...' + if tans=`sh -c hostname 2>&1` ; then + myhostname=$tans + phostname=hostname + cont='' + fi + ;; +*) cont='';; +esac +if $test "$cont"; then + if ./xenix; then + echo 'Oh, dear. Maybe "/etc/systemid" is the key...' + if tans=`cat /etc/systemid 2>&1` ; then + myhostname=$tans + phostname='cat /etc/systemid' + echo "Whadyaknow. Xenix always was a bit strange..." + cont='' + fi + elif $test -r /etc/systemid; then + echo "(What is a non-Xenix system doing with /etc/systemid?)" + fi +fi +if $test "$cont"; then + echo 'No, maybe "uuname -l" will work...' + if tans=`sh -c 'uuname -l' 2>&1` ; then + myhostname=$tans + phostname='uuname -l' + else + echo 'Strange. Maybe "uname -n" will work...' + if tans=`sh -c 'uname -n' 2>&1` ; then + myhostname=$tans + phostname='uname -n' + else + echo 'Oh well, maybe I can mine it out of whoami.h...' + if tans=`sh -c $contains' sysname $usrinc/whoami.h' 2>&1` ; then + myhostname=`echo "$tans" | $sed 's/^.*"\(.*\)"/\1/'` + phostname="sed -n -e '"'/sysname/s/^.*\"\\(.*\\)\"/\1/{'"' -e p -e q -e '}' <$usrinc/whoami.h" + else + case "$myhostname" in + '') echo "Does this machine have an identity crisis or something?" + phostname='';; + *) + echo "Well, you said $myhostname before..." + phostname='echo $myhostname';; + esac + fi + fi + fi +fi +case "$myhostname" in +'') myhostname=noname ;; +esac +: you do not want to know about this +set $myhostname +myhostname=$1 + +: verify guess +if $test "$myhostname" ; then + dflt=y + rp='Your host name appears to be "'$myhostname'".'" Right?" + . ./myread + case "$ans" in + y*) ;; + *) myhostname='';; + esac +fi + +: bad guess or no guess +while $test "X$myhostname" = X ; do + dflt='' + rp="Please type the (one word) name of your host:" + . ./myread + myhostname="$ans" +done + +: translate upper to lower if necessary +case "$myhostname" in +*[A-Z]*) + echo "(Normalizing case in your host name)" + myhostname=`echo $myhostname | ./tr '[A-Z]' '[a-z]'` + ;; +esac + +?X: Do not ask for domain name if this is not used later on. In that +?X: case, the hostname may keep its domain name, but it doesn't matter. +@if MYDOMAIN || mydomain +case "$myhostname" in +*.*) + dflt=`expr "X$myhostname" : "X[^.]*\(\..*\)"` + myhostname=`expr "X$myhostname" : "X\([^.]*\)\."` + echo "(Trimming domain name from host name--host name is now $myhostname)" + ;; +*) case "$mydomain" in + '') +?X: +?X: There is currently no way to say we do not want hostcat if mydomain is not +?X: used. One way to achieve that would be to put that code in a mydomain.U +?X: unit. However, we want to stick the sanity checks right after the domain +?X: name computation, or if none is done, right after the hostname computation. +?X: + { +?X: If we use NIS, try ypmatch. + test "X$hostcat" = "Xypcat hosts" && + ypmatch "$myhostname" hosts 2>/dev/null |\ + $sed -e 's/[ ]*#.*//; s/$/ /' > hosts && \ + $test -s hosts + } || { +?X: Extract only the relevant hosts, reducing file size, +?X: remove comments, insert trailing space for later use. + $hostcat | $sed -n -e "s/[ ]*#.*//; s/\$/ / + /[ ]$myhostname[ . ]/p" > hosts + } + tmp_re="[ . ]" + $test x`$awk "/[0-9].*[ ]$myhostname$tmp_re/ { sum++ } + END { print sum }" hosts` = x1 || tmp_re="[ ]" + dflt=.`$awk \ + "/[0-9].*[ ]$myhostname$tmp_re/ {for(i=2; i<=NF;i++) print \\\$i}" \ + hosts | $sort | $uniq | \ + $sed -n -e "s/$myhostname\.\([-a-zA-Z0-9_.]\)/\1/p"` + case `$echo X$dflt` in + X*\ *) echo "(Several hosts in /etc/hosts matched hostname)" + dflt=. + ;; +?X: There is no /etc/hosts on os390 + X.) + if $test -f /etc/hosts; then + echo "(You do not have fully-qualified names in /etc/hosts)" + else + echo "(I cannot locate a hosts database anywhere)" + fi + ;; + esac + case "$dflt" in + .) + tans=`./loc resolv.conf X /etc /usr/etc` + if $test -f "$tans"; then + echo "(Attempting domain name extraction from $tans)" +?X: Look for either a search or a domain directive. + dflt=.`$sed -n -e 's/ / /g' \ + -e 's/^search *\([^ ]*\).*/\1/p' $tans \ + | ./tr '[A-Z]' '[a-z]' 2>/dev/null` + case "$dflt" in + .) dflt=.`$sed -n -e 's/ / /g' \ + -e 's/^domain *\([^ ]*\).*/\1/p' $tans \ + | ./tr '[A-Z]' '[a-z]' 2>/dev/null` + ;; + esac + fi + ;; + esac + case "$dflt" in + .) echo "(No help from resolv.conf either -- attempting clever guess)" + dflt=.`sh -c domainname 2>/dev/null` + case "$dflt" in + '') dflt='.';; + .nis.*|.yp.*|.main.*) dflt=`echo $dflt | $sed -e 's/^\.[^.]*//'`;; + esac + ;; + esac + case "$dflt$osname" in + .os390) + file="//'SYS1.TCPPARMS(TCPDATA)'" + echo "(Attempting domain name extraction from $file)" + dflt=.`awk '/^DOMAINORIGIN/ {print $2}' "$file" 2>/dev/null` + ;; + esac + case "$dflt" in + .) echo "(Lost all hope -- silly guess then)" + dflt='.nonet' + ;; + esac + $rm -f hosts + ;; + *) dflt="$mydomain";; + esac;; +esac +echo " " +rp="What is your domain name?" +. ./myread +tans="$ans" +case "$ans" in +'') ;; +.*) ;; +*) tans=".$tans";; +esac +mydomain="$tans" + +: translate upper to lower if necessary +case "$mydomain" in +*[A-Z]*) + echo "(Normalizing case in your domain name)" + mydomain=`echo $mydomain | ./tr '[A-Z]' '[a-z]'` + ;; +esac + +@end +: a little sanity check here +case "$phostname" in +'') ;; +*) + case `$phostname | ./tr '[A-Z]' '[a-z]'` in + $myhostname$mydomain|$myhostname) ;; + *) + case "$phostname" in + sed*) + echo "(That doesn't agree with your whoami.h file, by the way.)" + ;; + *) + echo "(That doesn't agree with your $phostname command, by the way.)" + ;; + esac + ;; + esac + ;; +esac + |