README
1The /rescue build system here has three goals:
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31) Produce a reliable standalone set of /rescue tools.
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5The contents of /rescue are all statically linked and do not depend on
6anything in /bin or /sbin. In particular, they'll continue to
7function even if you've hosed your dynamic /bin and /sbin. For
8example, note that /rescue/mount runs /rescue/mount_nfs and not
9/sbin/mount_nfs. This is more subtle than it looks.
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11As an added bonus, /rescue is fairly small (thanks to crunchgen) and
12includes a number of tools (such as gzip, bzip2, vi) that are not
13normally found in /bin and /sbin.
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152) Demonstrate robust use of crunchgen.
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17These Makefiles recompile each of the crunchgen components and include
18support for overriding specific library entries. Such techniques
19should be useful elsewhere.
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213) Produce a toolkit suitable for small distributions.
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23Install /rescue on a CD or CompactFlash disk, and symlink /bin and
24/sbin to /rescue to produce a small and fairly complete FreeBSD
25system.
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27These tools have one big disadvantage: being statically linked, they
28cannot use some advanced library functions that rely on dynamic
29linking. In particular, nsswitch, locales, and pam all
30rely on dynamic linking.
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33To compile:
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35# cd /usr/src/rescue
36# make obj
37# make
38# make install
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40Note that rebuilds don't always work correctly; if you run into
41trouble, try 'make clean' before recompiling.
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