#! /usr/bin/ksh

# Original Author: Tim Mooney (mooney@plains.nodak.edu)
# This file is distributed under the terms of the GNU Public License
#
# find-provides is part of RPM, the RedHat Package Manager.  find-provides
# reads a list of full pathnames (in a package) on stdin, and outputs all
# shared libraries provided by (contained in) the package.
#
#
# On Digital Unix (OSF1), use `odump -D' to find what libraries a package
# provides
#
# Example `odump -D' output:
#
#$odump -D /usr/shlib/libc.so
#
#
#
#
#			***DYNAMIC SECTION***
#	         Tag            Value
#
#/usr/shlib/libc.so:
#	          UNREFEXTNO: 14.
#	         LOCAL_GOTNO: 521.
#	              GOTSYM: 2205.
#	         LOCAL_GOTNO: 1606.
#	              GOTSYM: 3289.
#	              SONAME: libc.so
#	          TIME_STAMP: (0x34a82daa) Mon Dec 29 17:09:30 1997
#
#	           ICHECKSUM: 0x5e955f9b
#	            IVERSION: osf.1
#	          CONFLICTNO: 0.
#	         RLD_VERSION: 2.
#	                HASH: 0x000003ff800a82e0
#	              STRTAB: 0x000003ff8008aad0
#	              SYMTAB: 0x000003ff80094ab0
#	                MSYM: 0x000003ff800842c0
#	               STRSZ: 40922.
#	              SYMENT: 24.
#	              PLTGOT: 0x000003ffc008f240
#	            SYMTABNO: 3330.
#	        BASE_ADDRESS: 0x000003ff80080000
#	            HIPAGENO: 0.
#	               RELSZ: 15296.
#	              RELENT: 16.
#	                 REL: 0x000003ff80080700
#	           LIBLISTNO: 0.
#	                INIT: 0x000003ff8019c520
#	                FINI: 0x000003ff8019c570
#	               FLAGS: 0x00000001
#

for f in `cat -`
do
	odump -D $f 2>/dev/null | awk '

		BEGIN { 
			FS = " ";
			RS = "\n";
			OFS = "";

			found_soname = 0;
			found_iversion = 0;
		}

		# Uncomment the next line for some debugging info.
		#{ print NR , ":", $0  }

		/^[	 ]+SONAME: .*[ 	]*$/ {
			found_soname = 1;
			numfields = split($0, internal_name)
			if (numfields == 2) {
				soname = $2
				#
				# we should probably check to see if the soname ends with
				# a number (indicating that it contains versioning info,
				# possibly in addition to the versioning info in the versions
				# field) and generate a warning here.  Shared libraries should
				# not be built with version info in the soname on Digital Unix.
				#
			} else {
				#
				# Should never be here.
				#
				print "Really odd looking soname:", $0 | "cat 1>&2"
				exit
			}
		}

		/^[ 	]+IVERSION: .*[ 	]*$/ {
			if (found_soname == 1) {
				numfields = split($0, iversion)
				if (numfields == 2) {
					version = $2
					#
					# handle libraries with multiple versions, like
					# 1.1:1.2.  Since they really provide both versions,
					# we need to generate output for each version.
					#
					numfields = split(version, versions, ":")
					if (numfields > 1) {
						for (i = 1; i < numfields; i++) {
							print soname, ".", versions[i]
						}
						#
						# let our END routine print out the *last* version
						# provided
						#
						version = versions[numfields]
					}
					#
					# stick a fork in us.
					#
					found_iversion = 1;
					exit
				} else {
					#
					# Should never be here.
					#
					print "Odd looking library version:", $0 | "cat 1>&2"
					exit
				}
			} else {
				#
				# found an iversion without an soname.  Is that possible?
				#
				print "Found version but no soname:", $0 | "cat 1>&2"
				exit
			}
		}

		#
		# we could probably watch for some other token (like RLD_VERSION)
		# that *generally* occurs later in the input than the stuff we watch
		# for, and exit if we see it, but it is just as easy to read all
		# the output, even after we have seen what we are looking for.
		#

		END {
			# Uncomment the next line for debugging info
			#{ print "END: NR: ", NR }
			if ( (found_soname == 1) && (found_iversion == 1) ) {
				print soname, ".", version
				exit
			} else if (found_soname == 1) {
				#
				# no library version information
				#
				print soname
			}
			# else do nothing
		}
	' # end of awk
done | sort -u
#comment out the previous line and uncomment the next line when debugging
#done
