lfs-book-i18n/zh_CN/chapter04/settingenviron.po

# SOME DESCRIPTIVE TITLE
# Copyright (C) YEAR Free Software Foundation, Inc.
# This file is distributed under the same license as the PACKAGE package.
# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
#
#, fuzzy
msgid ""
msgstr ""
"Project-Id-Version: PACKAGE VERSION\n"
"POT-Creation-Date: 2020-06-17 12:44+0800\n"
"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
"Language-Team: LANGUAGE <LL@li.org>\n"
"Language: \n"
"MIME-Version: 1.0\n"
"Content-Type: text/plain; charset=UTF-8\n"
"Content-Transfer-Encoding: 8bit\n"

#. type: Content of: <sect1><title>
#: /home/xry111/svn-repos/LFS-BOOK/chapter04/settingenviron.xml:11
msgid "Setting Up the Environment"
msgstr ""

#. type: Content of: <sect1><para>
#: /home/xry111/svn-repos/LFS-BOOK/chapter04/settingenviron.xml:13
msgid ""
"Set up a good working environment by creating two new startup files for the "
"<command>bash</command> shell. While logged in as user <systemitem "
"class=\"username\">lfs</systemitem>, issue the following command to create a "
"new <filename>.bash_profile</filename>:"
msgstr ""

#. type: Content of: <sect1><screen>
#: /home/xry111/svn-repos/LFS-BOOK/chapter04/settingenviron.xml:18
#, no-wrap
msgid ""
"<userinput>cat &gt; ~/.bash_profile &lt;&lt; \"EOF\"\n"
"<literal>exec env -i HOME=$HOME TERM=$TERM PS1='\\u:\\w\\$ ' "
"/bin/bash</literal>\n"
"EOF</userinput>"
msgstr ""

#. type: Content of: <sect1><para>
#: /home/xry111/svn-repos/LFS-BOOK/chapter04/settingenviron.xml:22
msgid ""
"When logged on as user <systemitem class=\"username\">lfs</systemitem>, the "
"initial shell is usually a <emphasis>login</emphasis> shell which reads the "
"<filename>/etc/profile</filename> of the host (probably containing some "
"settings and environment variables) and then "
"<filename>.bash_profile</filename>.  The <command>exec env "
"-i.../bin/bash</command> command in the <filename>.bash_profile</filename> "
"file replaces the running shell with a new one with a completely empty "
"environment, except for the <envar>HOME</envar>, <envar>TERM</envar>, and "
"<envar>PS1</envar> variables. This ensures that no unwanted and potentially "
"hazardous environment variables from the host system leak into the build "
"environment. The technique used here achieves the goal of ensuring a clean "
"environment."
msgstr ""

#. type: Content of: <sect1><para>
#: /home/xry111/svn-repos/LFS-BOOK/chapter04/settingenviron.xml:34
msgid ""
"The new instance of the shell is a <emphasis>non-login</emphasis> shell, "
"which does not read, and execute, the conten of "
"<filename>/etc/profile</filename> or <filename>.bash_profile</filename> "
"files, but rather reads, and executes, the <filename>.bashrc</filename> file "
"instead. Create the <filename>.bashrc</filename> file now:"
msgstr ""

#. type: Content of: <sect1><screen>
#: /home/xry111/svn-repos/LFS-BOOK/chapter04/settingenviron.xml:40
#, no-wrap
msgid ""
"<userinput>cat &gt; ~/.bashrc &lt;&lt; \"EOF\"\n"
"<literal>set +h\n"
"umask 022\n"
"LFS=/mnt/lfs\n"
"LC_ALL=POSIX\n"
"LFS_TGT=$(uname -m)-lfs-linux-gnu\n"
"PATH=/usr/bin\n"
"if [ ! -L /bin ]; then PATH=/bin:$PATH; fi\n"
"PATH=$LFS/tools/bin:$PATH\n"
"export LFS LC_ALL LFS_TGT PATH</literal>\n"
"EOF</userinput>"
msgstr ""

#. type: Content of: <sect1><variablelist><title>
#: /home/xry111/svn-repos/LFS-BOOK/chapter04/settingenviron.xml:53
msgid "The meaning of the settings in <filename>.bashrc</filename>"
msgstr ""

#. type: Content of: <sect1><variablelist><varlistentry><term>
#: /home/xry111/svn-repos/LFS-BOOK/chapter04/settingenviron.xml:56
msgid "<parameter>set +h</parameter>"
msgstr ""

#. type: Content of: <sect1><variablelist><varlistentry><listitem><para>
#: /home/xry111/svn-repos/LFS-BOOK/chapter04/settingenviron.xml:58
msgid ""
"The <command>set +h</command> command turns off <command>bash</command>'s "
"hash function. Hashing is ordinarily a useful "
"feature&mdash;<command>bash</command> uses a hash table to remember the full "
"path of executable files to avoid searching the <envar>PATH</envar> time and "
"again to find the same executable. However, the new tools should be used as "
"soon as they are installed. By switching off the hash function, the shell "
"will always search the <envar>PATH</envar> when a program is to be run. As "
"such, the shell will find the newly compiled tools in <filename "
"class=\"directory\">~/tools</filename> as soon as they are available without "
"remembering a previous version of the same program in a different location."
msgstr ""

#. type: Content of: <sect1><variablelist><varlistentry><term>
#: /home/xry111/svn-repos/LFS-BOOK/chapter04/settingenviron.xml:73
msgid "<parameter>umask 022</parameter>"
msgstr ""

#. type: Content of: <sect1><variablelist><varlistentry><listitem><para>
#: /home/xry111/svn-repos/LFS-BOOK/chapter04/settingenviron.xml:75
msgid ""
"Setting the user file-creation mask (umask) to 022 ensures that newly "
"created files and directories are only writable by their owner, but are "
"readable and executable by anyone (assuming default modes are used by the "
"<function>open(2)</function> system call, new files will end up with "
"permission mode 644 and directories with mode 755)."
msgstr ""

#. type: Content of: <sect1><variablelist><varlistentry><term>
#: /home/xry111/svn-repos/LFS-BOOK/chapter04/settingenviron.xml:84
msgid "<parameter>LFS=/mnt/lfs</parameter>"
msgstr ""

#. type: Content of: <sect1><variablelist><varlistentry><listitem><para>
#: /home/xry111/svn-repos/LFS-BOOK/chapter04/settingenviron.xml:86
msgid "The <envar>LFS</envar> variable should be set to the chosen mount point."
msgstr ""

#. type: Content of: <sect1><variablelist><varlistentry><term>
#: /home/xry111/svn-repos/LFS-BOOK/chapter04/settingenviron.xml:92
msgid "<parameter>LC_ALL=POSIX</parameter>"
msgstr ""

#. type: Content of: <sect1><variablelist><varlistentry><listitem><para>
#: /home/xry111/svn-repos/LFS-BOOK/chapter04/settingenviron.xml:94
msgid ""
"The <envar>LC_ALL</envar> variable controls the localization of certain "
"programs, making their messages follow the conventions of a specified "
"country.  Setting <envar>LC_ALL</envar> to <quote>POSIX</quote> or "
"<quote>C</quote> (the two are equivalent) ensures that everything will work "
"as expected in the chroot environment."
msgstr ""

#. type: Content of: <sect1><variablelist><varlistentry><term>
#: /home/xry111/svn-repos/LFS-BOOK/chapter04/settingenviron.xml:103
msgid "<parameter>LFS_TGT=(uname -m)-lfs-linux-gnu</parameter>"
msgstr ""

#. type: Content of: <sect1><variablelist><varlistentry><listitem><para>
#: /home/xry111/svn-repos/LFS-BOOK/chapter04/settingenviron.xml:105
msgid ""
"The <envar>LFS_TGT</envar> variable sets a non-default, but compatible "
"machine description for use when building our cross compiler and linker and "
"when cross compiling our temporary toolchain. More information is contained "
"in <xref linkend=\"ch-tools-toolchaintechnotes\" role=\"\"/>."
msgstr ""

#. type: Content of: <sect1><variablelist><varlistentry><term>
#: /home/xry111/svn-repos/LFS-BOOK/chapter04/settingenviron.xml:113
msgid "<parameter>PATH=/usr/bin</parameter>"
msgstr ""

#. type: Content of: <sect1><variablelist><varlistentry><listitem><para>
#: /home/xry111/svn-repos/LFS-BOOK/chapter04/settingenviron.xml:115
msgid ""
"Many modern linux distributions have merged <filename "
"class=\"directory\">/bin</filename> and <filename "
"class=\"directory\">/usr/bin</filename>. When this is the case, the standard "
"<envar>PATH</envar> variable needs just to be set to <filename "
"class=\"directory\">/usr/bin/</filename> for the <xref "
"linkend=\"chapter-temporary-tools\"/> environment. When this is not the "
"case, the following line adds <filename class=\"directory\">/bin</filename> "
"to the path."
msgstr ""

#. type: Content of: <sect1><variablelist><varlistentry><term>
#: /home/xry111/svn-repos/LFS-BOOK/chapter04/settingenviron.xml:127
msgid "<parameter>if [ ! -L /bin ]; then PATH=/bin:$PATH; fi</parameter>"
msgstr ""

#. type: Content of: <sect1><variablelist><varlistentry><listitem><para>
#: /home/xry111/svn-repos/LFS-BOOK/chapter04/settingenviron.xml:129
msgid ""
"If <filename class=\"directory\">/bin</filename> is not a symbolic link, "
"then it has to be added to the <envar>PATH</envar> variable."
msgstr ""

#. type: Content of: <sect1><variablelist><varlistentry><term>
#: /home/xry111/svn-repos/LFS-BOOK/chapter04/settingenviron.xml:135
msgid "<parameter>PATH=$LFS/tools/bin:$PATH</parameter>"
msgstr ""

#. type: Content of: <sect1><variablelist><varlistentry><listitem><para>
#: /home/xry111/svn-repos/LFS-BOOK/chapter04/settingenviron.xml:137
msgid ""
"By putting <filename class=\"directory\">$LFS/tools/bin</filename> ahead of "
"the standard <envar>PATH</envar>, the cross-compiler installed at the "
"beginning of <xref linkend=\"chapter-cross-tools\"/> is picked up by the "
"shell immediately after its installation. This, combined with turning off "
"hashing, limits the risk that the compiler from the host be used instead of "
"the cross-compiler."
msgstr ""

#. type: Content of: <sect1><variablelist><varlistentry><term>
#: /home/xry111/svn-repos/LFS-BOOK/chapter04/settingenviron.xml:147
msgid "<parameter>export LFS LC_ALL LFS_TGT PATH</parameter>"
msgstr ""

#. type: Content of: <sect1><variablelist><varlistentry><listitem><para>
#: /home/xry111/svn-repos/LFS-BOOK/chapter04/settingenviron.xml:149
msgid ""
"While the above commands have set some variables, in order to make them "
"visible within any sub-shells, we export them."
msgstr ""

#. type: Content of: <sect1><para>
#: /home/xry111/svn-repos/LFS-BOOK/chapter04/settingenviron.xml:156
msgid ""
"Finally, to have the environment fully prepared for building the temporary "
"tools, source the just-created user profile:"
msgstr ""

#. type: Content of: <sect1><screen>
#: /home/xry111/svn-repos/LFS-BOOK/chapter04/settingenviron.xml:159
#, no-wrap
msgid "<userinput>source ~/.bash_profile</userinput>"
msgstr ""