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Old 1st June 2008
J65nko J65nko is online now
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Join Date: May 2008
Location: Budel - the Netherlands
Posts: 3,896
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A more user-friendly version with the following features:
  • Interactive ftp site selection
  • Interactive multiple install sets selection
  • Automatic OS detection (FreeBSD and OpenBSD) to select either the FBSD 'fetch' or OBSD's 'ftp'.

Technical notes For shell programmers
  • The script uses 'eval' to create shell variables in the format "server_1", "server_2" etc.
    In an effort to keep the global variable namespace as lean and mean as possible, these variables have been defined "local" within their function.

    Yes, bash and ksh support arrays, but I have tried to stick to a portable standard "sh" implementation.

  • The functions "select_server()" and "select_sets ()" are passed a string. Again using "eval" the function creates a shell variable, having this string as it's name.
    This way the function is not "tied" to a single global sh variable to return a value.
Code:
#!/bin/sh
# --- get OpenBSD snapshot
# j65nko bsdforums.org
# 2005-10-15 : interactive ftp site selection 
# 2005-10-17 : interactive fileset selection
# 2006-04-18 : show contents of file sets

# --- customizeable ftp sites 

sites="ftp.openbsd.org \
	ftp.calyx.nl \
	ftp.nluug.nl \
	ftp.stacken.kth.se \
	ftp.plig.org \
	sunsite.cnlab-switch.ch"

#  ----- standard ftp directory
dir=pub/OpenBSD/snapshots/i386

# --- customizeable file sets

VERSION=39

base="MD5 \
	base${VERSION}.tgz \
	bsd \
	bsd.rd \
	bsd.mp \
	comp${VERSION}.tgz \
	etc${VERSION}.tgz \
	floppy${VERSION}.fs \
	man${VERSION}.tgz \
	misc${VERSION}.tgz"

xwin="xbase${VERSION}.tgz \
      xfont${VERSION}.tgz \
      xserv${VERSION}.tgz \
      xetc${VERSION}.tgz \
      xshare${VERSION}.tgz"

iso="cd${VERSION}.iso"

scsi="floppyB${VERSION}.fs"

mini="MD5 \
	base${VERSION}.tgz \
	bsd \
	bsd.rd \
	etc${VERSION}.tgz \
	floppy${VERSION}.fs \
"

man="man${VERSION}.tgz"

comp="comp${VERSION}.tgz"

mp="bsd.mp"

pxeboot="pxeboot"

allsets="base xwin mini iso scsi man mp comp pxeboot"

# ========================== end of customizeable section ===========
# --- FTP command
FTPCMD=''

if sysctl kern.ostype | grep -i openbsd >/dev/null 2>&1 ; then
    FTPCMD="ftp -4"
elif sysctl kern.ostype | grep -i freebsd >/dev/null 2>&1 ; then
    FTPCMD="fetch -4"
else
    echo "$0: Sorry, unknown OS. Exiting ..." 
    exit 10
fi
 
echo $FTPCMD
#exit

# ---- function to print 50 dashes 

dashes() {
    echo "--------------------------------------------------"
}

# --- function to select ftpserver
 
select_server() {
    local count name choice
    local server_1 server_2 server_3 server_4
    local server_5 server_6 server_7 server_8
    
    count=0		# number of servers to choose from

    echo  ; dashes
    for name in ${sites} ; do
        count=$((count+1))  
        echo "${count})  ${name}"
        # create shell variable server_1, server_2, server_3 etc
        eval "server_${count}=${name}" 
    done 
    dashes
    
    echo  -n "Select the ftp site by number : "
    read choice 
    
    # --- check validity of chosen number
    
    if [ ${choice} -gt 0 -a ${choice} -le ${count}  ]; then
        # $1 (first paramater passed to the function = string "server"
        # server=$server_1 
        eval $1=\$server_${choice}
    else
        # error code 1
        return 1
    fi 
} # --- end of function


# --- select sets
# parameter $1 is name of variable 
# the function will create a shell variable with this name 

select_sets () {

    local count name nr all
    local set_1 set_2 set_3 set_4 set_5
    local set_6 set_7 set_8 set_9 set_10
    local sets_chosen

    count=0

    dashes
    for name in ${allsets} ; do
        count=$((count+1))
        #echo -n "${count}) ${name}    -["
        printf "(%2d) %-15s : " "${count}" "${name}"
        eval echo  \$${name}
        eval "set_${count}=${name}" # create variable: set_1, set_2, set_3 etc
    done
    dashes

    echo -n 'Please enter the number(s) of the filesets separated by a space :'
    read all

    for nr in ${all} ; do
        eval sets_chosen=\"\${sets_chosen} \$set_${nr}\"
        #echo ${sets_chosen}
    done

    # create variable on the fly
    eval $1=\${sets_chosen}
    #echo "RETURNING these filesets: ${sets_chosen}==="

} # --- end of function

# --- main function

get () {

    local ftplist filename answer full_name

    for filename in $@ ; do
        full_name=ftp://${server}/${dir}/${filename}
        ftplist="${ftplist} ${full_name}"
    done

    echo
    echo About to get the following:
    dashes
    echo ${ftplist} | tr ' ' '\n'
    dashes 
    
    echo -n "Press Y to fetch, any other to quit "
    read answer

    case ${answer} in
    [Yy] )	${FTPCMD} ${ftplist}
		;;
    * )		echo "Skipping ftp of:"
                dashes 
		echo ${ftplist} |  tr ' ' '\n'
		;;
    esac 
}

# --- main script

if select_server "server" ; then
    echo ; dashes
    echo "Selected FTP SERVER : $server"
    dashes ; echo
else
    echo "$0: No valid selection of ftp server"
    exit 1
fi

select_sets "chosen"

echo ; dashes ; echo "Selected fileset\(s\): $chosen" ; dashes ; echo
# exit 1

for fileset in ${chosen} ; do
    #echo "====${fileset}======" 
    eval get \$${fileset}
done

# --- debugging local variables
#set

dashes ; echo "$0: done!"
A transcript of a "get_snapshot" session on a FreeBSD box
Code:
Script started on Tue Apr 18 21:43:29 2006
j65nko@plato[~/snap]./get_snapshot

--------------------------------------------------
1)  ftp.openbsd.org
2)  ftp.calyx.nl
3)  ftp.nluug.nl
4)  ftp.stacken.kth.se
5)  ftp.plig.org
6)  sunsite.cnlab-switch.ch
--------------------------------------------------
Select the ftp site by number : 5

--------------------------------------------------
Selected FTP SERVER : ftp.plig.org
--------------------------------------------------

--------------------------------------------------
( 1) base            : MD5 base39.tgz bsd bsd.rd bsd.mp comp39.tgz etc39.tgz floppy39.fs man39.tgz misc39.tgz
( 2) xwin            : xbase39.tgz xfont39.tgz xserv39.tgz xetc39.tgz xshare39.tgz
( 3) mini            : MD5 base39.tgz bsd bsd.rd etc39.tgz floppy39.fs
( 4) iso             : cd39.iso
( 5) scsi            : floppyB39.fs
( 6) man             : man39.tgz
( 7) mp              : bsd.mp
( 8) comp            : comp39.tgz
( 9) pxeboot         : pxeboot
--------------------------------------------------
Please enter the number(s) of the filesets separated by a space :3 7

--------------------------------------------------
Selected fileset\(s\):  mini mp
--------------------------------------------------

About to get the following:
--------------------------------------------------
ftp://ftp.plig.org/pub/OpenBSD/snapshots/i386/MD5
ftp://ftp.plig.org/pub/OpenBSD/snapshots/i386/base39.tgz
ftp://ftp.plig.org/pub/OpenBSD/snapshots/i386/bsd
ftp://ftp.plig.org/pub/OpenBSD/snapshots/i386/bsd.rd
ftp://ftp.plig.org/pub/OpenBSD/snapshots/i386/etc39.tgz
ftp://ftp.plig.org/pub/OpenBSD/snapshots/i386/floppy39.fs
--------------------------------------------------
Press Y to fetch, any other to quit y
MD5                                           100% of 1019  B   48 kBps
base39.tgz                                    100% of   39 MB  317 kBps 00m00s
bsd                                           100% of 5348 kB  316 kBps 00m00s
bsd.rd                                        100% of 4630 kB  317 kBps 00m00s
etc39.tgz                                     100% of 1126 kB  303 kBps
floppy39.fs                                   100% of 1440 kB  315 kBps

About to get the following:
--------------------------------------------------
ftp://ftp.plig.org/pub/OpenBSD/snapshots/i386/bsd.mp
--------------------------------------------------
Press Y to fetch, any other to quit y
bsd.mp                                        100% of 5391 kB  314 kBps 00m00s
--------------------------------------------------
./get_snapshot: done!

j65nko@plato[~/snap]exit
exit
Script done on Tue Apr 18 21:49:41 2006
Attached Files
File Type: sh get_snapshot_2.sh (4.2 KB, 109 views)
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