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# encoding: utf-8 | ||
# ------------------------------------------------------------------------------ | ||
# Copyright (c) 2021 SUSE LLC | ||
# | ||
# This program is free software; you can redistribute it and/or modify it under | ||
# the terms of version 2 of the GNU General Public License as published by the | ||
# Free Software Foundation. | ||
# | ||
# This program is distributed in the hope that it will be useful, but WITHOUT | ||
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS | ||
# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. | ||
# | ||
# ------------------------------------------------------------------------------ | ||
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require "yast" | ||
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# Class to get information about shared libraries used by a process from its | ||
# /proc/self/maps file. | ||
# | ||
# You can also get information for a different process by specifying its | ||
# /proc/$pid/maps file. | ||
# | ||
# For testing, a fixed file can be used. | ||
module Yast2 | ||
class SharedLibInfo | ||
include Yast::Logger | ||
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# @return [Array<String>] Complete paths of the shared libs | ||
attr_reader :shared_libs | ||
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def initialize(maps_file = "/proc/self/maps") | ||
clear | ||
read(maps_file) | ||
end | ||
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def clear | ||
@shared_libs = [] | ||
end | ||
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def read(maps_file = "/proc/self/maps") | ||
return if maps_file.nil? || maps_file.empty? | ||
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open(maps_file).each { |line| parse_maps_line(line) } | ||
@shared_libs.uniq! | ||
end | ||
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# Return the directory name of a shared lib with a full path. | ||
# This is really only an alias for File.dirname(). | ||
# | ||
def self.dirname(lib) | ||
File.dirname(lib) | ||
end | ||
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# Return the library basename of a shared lib (with or without a full | ||
# path). Unlike File.basename(), this also cuts off the SO number. | ||
# | ||
# Example: | ||
# "/usr/lib64/libscr.so.3.0.0" -> "libscr" | ||
# "/usr/lib64/libc-2.33.so" -> "libc-2.33" | ||
# | ||
def self.lib_basename(lib) | ||
split_lib_name(lib).first | ||
end | ||
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# Return the so number of a shared lib (with or without a full | ||
# path). | ||
# | ||
# Example: | ||
# "/usr/lib64/libscr.so.3.0.0" -> "3.0.0" | ||
# "/usr/lib64/libc-2.33.so" -> nil | ||
# | ||
def self.so_number(lib) | ||
split_lib_name(lib).last | ||
end | ||
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# Split a library name (with or without a full path) up into its base name | ||
# and its SO number and return both. | ||
# | ||
# Example: | ||
# "/usr/lib64/libscr.so.3.0.0" -> ["libscr", "3.0.0"] | ||
# "/usr/lib64/libc-2.33.so" -> ["libc-2.33", nil] | ||
# | ||
def self.split_lib_name(lib) | ||
full_name = File.basename(lib) # "libscr.so.3.0.0" | ||
full_name.split(/\.so\.?/) # ["libscr", "3.0.0"] | ||
end | ||
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private | ||
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# Parse one entry of /proc/self/maps and add an entry to @shared_libs if | ||
# applicable. | ||
# | ||
# @param line [String] one line of /proc/self/maps | ||
# @return [String, nil] the shared lib with path on this line | ||
# | ||
def parse_maps_line(line) | ||
# Sample lines: | ||
# | ||
# 7fb22485f000-7fb22486f000 r--p 000f0000 08:02 132839 /usr/lib64/yui/libyui-qt.so.15.0.0 | ||
# 7fb22486f000-7fb224872000 rw-p 00100000 08:02 132839 /usr/lib64/yui/libyui-qt.so.15.0.0 | ||
# 7fb2248a2000-7fb2248d8000 r--p 00000000 08:02 1054948 /usr/lib64/libyui.so.15.0.0 | ||
# 7f8cadbc5000-7f8cadbc9000 rw-p 00000000 00:00 0 | ||
# 7fffe6181000-7fffe6183000 r-xp 00000000 00:00 0 [vdso] | ||
# | ||
# See also | ||
# https://www.kernel.org/doc/html/latest/filesystems/proc.html | ||
line.strip! | ||
return nil if line.empty? || line.start_with?("#") | ||
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path = line.split[5] | ||
@shared_libs << path unless path.nil? || path.start_with?("[") | ||
path | ||
end | ||
end | ||
end |