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| author | jdp <jdp@FreeBSD.org> | 2000-07-08 03:27:54 +0000 |
|---|---|---|
| committer | jdp <jdp@FreeBSD.org> | 2000-07-08 03:27:54 +0000 |
| commit | aa26657bfbbf4260f14797da8a632778e067951e (patch) | |
| tree | c5705e7cd1f89a09cb78d472835342f4f49c710e /libexec | |
| parent | 92dfcced5b1f09d53134a113742dd41d79195190 (diff) | |
| download | FreeBSD-src-aa26657bfbbf4260f14797da8a632778e067951e.zip FreeBSD-src-aa26657bfbbf4260f14797da8a632778e067951e.tar.gz | |
When installing the dynamic linker, save the previous version in
"ld-elf.so.1.old". The dynamic linker is a critical component of
the system, and it is difficult to recover if it is damaged and
there isn't a working backup available. For instance, parts of
the toolchain such as the assembler are dynamically linked, making
it impossible to build a new dynamic linker if the installed one
doesn't work.
Diffstat (limited to 'libexec')
| -rw-r--r-- | libexec/rtld-elf/Makefile | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/libexec/rtld-elf/Makefile b/libexec/rtld-elf/Makefile index db8955e..e3750cc 100644 --- a/libexec/rtld-elf/Makefile +++ b/libexec/rtld-elf/Makefile @@ -42,3 +42,15 @@ dyn_hack.so: .PATH: ${.CURDIR}/${MACHINE_ARCH} .include <bsd.prog.mk> + +# Keep the previous version of the dynamic linker for recovery +# purposes. This must come after the include of <bsd.prog.mk> so that +# BINDIR is set for the exists(...) constructs. +beforeinstall: +.if exists(${DESTDIR}${BINDIR}/${PROG}) + -chflags noschg ${DESTDIR}${BINDIR}/${PROG} +.if exists(${DESTDIR}${BINDIR}/${PROG}.old) + -chflags noschg ${DESTDIR}${BINDIR}/${PROG}.old +.endif + cp -p ${DESTDIR}${BINDIR}/${PROG} ${DESTDIR}${BINDIR}/${PROG}.old +.endif |
