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Add re-exec for server This allows ASLR to re-randomize the address space for every connection, preventing some vulnerabilities from being exploitable by repeated probing. Overhead (memory and time) is yet to be confirmed. At present this is only enabled on Linux. Other BSD platforms with fexecve() would probably also work though have not been tested.
author Matt Johnston <matt@ucc.asn.au>
date Sun, 30 Jan 2022 10:14:56 +0800
parents 1857c2c551ea
children
line wrap: on
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# $Id: implicit,v 1.11 2005/11/29 21:57:55 pape Exp $

.PHONY: deb-checkdir deb-checkuid

deb-checkdir:
	@test -e debian/control || sh -cx '! : wrong directory'
deb-checkuid:
	@test "`id -u`" -eq 0 || sh -cx '! : need root privileges'

%.deb: %.deb-docs %.deb-DEBIAN
	@rm -f $*.deb $*.deb-checkdir $*.deb-docs $*.deb-docs-base \
	  $*.deb-docs-docs $*.deb-docs-examples $*.deb-DEBIAN \
	  $*.deb-DEBIAN-dir $*.deb-DEBIAN-scripts $*.deb-DEBIAN-md5sums

%.udeb: %.deb-DEBIAN
	@rm -f $*.deb $*.deb-checkdir $*.deb-DEBIAN $*.deb-DEBIAN-dir \
	  $*.deb-DEBIAN-scripts $*.deb-DEBIAN-md5sums

%.deb-checkdir:
	@test -d debian/$* || sh -cx '! : directory debian/$* missing'
	@test "`id -u`" -eq 0 || sh -cx '! : need root privileges'

%.deb-docs-base:
	: implicit
	@rm -f debian/$*/usr/share/doc/$*/* || :
	@install -d -m0755 debian/$*/usr/share/doc/$*
	: debian/$*/usr/share/doc/$*/
	@sh -cx 'install -m0644 debian/copyright debian/$*/usr/share/doc/$*/'
	@sh -cx 'install -m0644 debian/changelog \
	  debian/$*/usr/share/doc/$*/changelog.Debian'
	@test ! -r changelog || \
	  sh -cx 'install -m0644 changelog debian/$*/usr/share/doc/$*/'
	@test -r debian/$*/usr/share/doc/$*/changelog || \
	  sh -cx 'mv debian/$*/usr/share/doc/$*/changelog.Debian \
	    debian/$*/usr/share/doc/$*/changelog'
	@test -s debian/$*/usr/share/doc/$*/changelog || \
	  sh -cx 'rm -f debian/$*/usr/share/doc/$*/changelog'
	@gzip -9 debian/$*/usr/share/doc/$*/changelog*
%.deb-docs-docs:
	@for i in `cat debian/$*.docs 2>/dev/null || :`; do \
	  if test -d $$i; then \
	    sh -cx "install -d -m0755 debian/$*/usr/share/doc/$*/$${i##*/}" && \
	    for j in $$i/*; do \
	      sh -cx "install -m0644 $$j \
	        debian/$*/usr/share/doc/$*/$${i##*/}/" || exit 1; \
	    done || exit 1; \
	    continue; \
	  fi; \
	  sh -cx "install -m0644 $$i debian/$*/usr/share/doc/$*/" || exit 1; \
	done
	@test ! -r debian/$*.README.Debian || \
	  sh -cx 'install -m0644 debian/$*.README.Debian \
	    debian/$*/usr/share/doc/$*/README.Debian'
	@if test -r debian/$*.NEWS.Debian; then \
	  sh -cx 'install -m0644 debian/$*.NEWS.Debian \
	    debian/$*/usr/share/doc/$*/NEWS.Debian && \
	      gzip -9 debian/$*/usr/share/doc/$*/NEWS.Debian'; \
	fi
%.deb-docs-examples:
	@rm -rf debian/$*/usr/share/doc/$*/examples
	: debian/$*/usr/share/doc/$*/examples/
	@test ! -r debian/$*.examples || \
	  install -d -m0755 debian/$*/usr/share/doc/$*/examples
	@for i in `cat debian/$*.examples 2>/dev/null || :`; do \
	  sh -cx "install -m0644 $$i debian/$*/usr/share/doc/$*/examples/" \
	    || exit 1; \
	done
%.deb-docs: %.deb-checkdir %.deb-docs-base %.deb-docs-docs %.deb-docs-examples
	: debian/$*/usr/share/doc/$*/ ok

%.deb-DEBIAN-base:
	@rm -rf debian/$*/DEBIAN
	: debian/$*/DEBIAN/
	@install -d -m0755 debian/$*/DEBIAN
	@for i in conffiles shlibs templates; do \
	  test ! -r debian/$*.$$i || \
	    sh -cx "install -m0644 debian/$*.$$i debian/$*/DEBIAN/$$i" \
	      || exit 1; \
	done
%.deb-DEBIAN-scripts:
	@for i in preinst prerm postinst postrm config; do \
	  test ! -r debian/$*.$$i || \
	    sh -cx "install -m0755 debian/$*.$$i debian/$*/DEBIAN/$$i" \
	      || exit 1; \
	done
%.deb-DEBIAN-md5sums:
	: debian/$*/DEBIAN/md5sums
	@rm -f debian/$*/DEBIAN/md5sums
	@cd debian/$* && find * -path 'DEBIAN' -prune -o \
	  -type f -exec md5sum {} >>DEBIAN/md5sums \;
%.deb-DEBIAN: %.deb-checkdir %.deb-DEBIAN-base %.deb-DEBIAN-scripts \
	  %.deb-DEBIAN-md5sums
	: debian/$*/DEBIAN/ ok