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#! /usr/bin/ksh

# Original Author: Tim Mooney (mooney@plains.nodak.edu)
# $Id: hpux.req,v 1.5 1999/09/30 00:22:15 jbj Exp $
#
# This file is distributed under the terms of the GNU Public License
#
# find-requires is part of RPM, the Red Hat Package Manager.  find-requires
# reads a list of full pathnames (in a package) on stdin, and outputs all
# shared libraries the package requires to run correctly.
#
# On HP-UX, use `chatr' to find the library dependencies for an executable
#
# Example chatr output:
#
#$chatr /usr/bin/chatr
#/usr/bin/chatr: 
#         shared executable 
#         shared library dynamic path search:
#             SHLIB_PATH     disabled  second 
#             embedded path  disabled  first  Not Defined
#         internal name:
#             chatr
#         shared library list:
#             dynamic   /usr/lib/libc.1
#         shared library binding:
#             deferred 
#         static branch prediction disabled
#         kernel assisted branch predictionenabled
#         lazy swap allocationdisabled
#         text segment lockingdisabled
#         data segment lockingdisabled
#         data page size: 4K
#         instruction page size: 4K

PATH=/usr/bin:/usr/sbin:/sbin:/usr/ccs/bin
export PATH

IFS=""
while read f
do
	# uncomment the next line if debugging
	# echo "### processing $f"

	#
	# Only run the file command once per file:
	#
	file_output=`file $f`

	#
	# First, check to see if it's a script, and try figure out what
	# intpreter it requires.  This is more work on HP-UX, since `file'
	# doesn't tell us what interpreter the script uses, or even if it
	# really is a script.
	#
	is_shell_script=`od -N 2 -t c $f 2>/dev/null | grep '0000000    #   !'`
	if test X"$is_shell_script" != X ; then
		#
		# it's a shell script.  Now figure out what interpreter it needs
		# Look at me!  I'm good with sed.  ;-)
		interp=`head -1 $f | sed -e 's/^#! \{0,1\}\([^ 	]*\).*$/\1/'`
		if test X"$interp" != X ; then
			echo "$interp"
			#
			# We've found what we need for this file.  Skip back to the
			# top of the loop.  This saves me an `else' and another indent
			# level!  ;-)
			continue
		fi
	fi
	
	#
	# The `else' is implied here by the `continue' above
	#

	#
	# Is it a shared library?
	#
	maybe_shared_lib=`echo "$file_output" | egrep '(executable|library)'`
	if test X"$maybe_shared_lib" != X ; then
		chatr $f 2>/dev/null \
		| awk '

		#
		# For you non-awk-ers, no single quotes in comments -- the shell
		# sees them and things get hosed.
		#

		BEGIN { 
			in_shlib_list = 0;
			FS = " ";
			RS = "\n";
		}

		# uncomment the next line for debugging information
		#{ print NR, ": ", $0 }


		in_shlib_list == 1 && /dynamic[ 	]+[\/\.]/ {
		
			# split the line on "/" and print out the last element
			numfields = split($0,fields,"/")
			print fields[numfields]

		}

		/^ +shared library list: *$/ {
			in_shlib_list = 1
		}

		/^ +shared library binding: *$/ {
			exit
		}
		' # end of awk
	fi # end of shared library if.
done | sort -u
#comment out the previous line and uncomment the next one if debugging.
#done