path: root/doc/revdep-pax.1

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.\"
.IX Title "REVDEP-PAX 1"
.TH REVDEP-PAX 1 "2011-10-19" "elfix 0.3" "Documentation for elfix"
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.nh
.SH "NAME"
revdep\-pax \- find mismatching PaX markings between ELF objects and their libraries
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
\&\fBrevdep-pax\fR \-f [\-v]
.PP
\&\fBrevdep-pax\fR \-r [\-ve]
.PP
\&\fBrevdep-pax\fR \-b \s-1OBJECT\s0 [\-myv]
.PP
\&\fBrevdep-pax\fR \-s \s-1SONAME\s0 [\-myve]
.PP
\&\fBrevdep-pax\fR \-l \s-1LIBRARY\s0 [\-myve]
.PP
\&\fBrevdep-pax\fR [\-h]
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fBrevdep-pax\fR finds mismatching PaX markings between an \s-1ELF\s0 object and the
libraries which that object dynamically links against.  When executing an \s-1ELF\s0
binary that links against libraries, the PaX hardened kernel ignores the libraries'
markings and uses the executable's markings to enforce PaX restrictions.
It is desireable in some circumstances to reverse migrate a library's markings
to the binaries that link against it.
.PP
revdep-pax can either forward migrate PaX markings from an \s-1ELF\s0 object to its
libraries, or reverse migrate from a library to all the objects that link
against it.  The library can either be specified by its \s-1SONAME\s0 as it is reported
by \fBldd\fR(1), or by the full path to the \s-1LIBRARY\s0 file.  Symbolic links are
dereferenced.  The user can optionally scan for all forward mappings on the
system (\-f), for all reverse mappings (\-r), for forward mappings of just one
\&\s-1OBJECT\s0 (\-b), for reverse mappings of just one \s-1SONAME\s0 (\-s) or one \s-1LIBRARY\s0 (\-l).
In verbose mode (\-v), all mappings are reported, not just mismatching ones,
and in mark mode (\-m), the user is prompted whether to proceed with the migration, 
so that the PaX flags of the target inherit the flags of the source.
.SH "OPTIONS"
.IX Header "OPTIONS"
.IP "\fB\-f\fR   Scan the system for all forward mappings." 4
.IX Item "-f   Scan the system for all forward mappings."
.PD 0
.IP "" 4
.IP "\fB\-r\fR   Scan the system for all reverse mappings." 4
.IX Item "-r   Scan the system for all reverse mappings."
.IP "" 4
.IP "\fB\-b\fR   \s-1OBJECT\s0  Retrieve only the forward mappings for this \s-1ELF\s0 \s-1OBJECT\s0." 4
.IX Item "-b   OBJECT  Retrieve only the forward mappings for this ELF OBJECT."
.IP "" 4
.IP "\fB\-s\fR   \s-1SONAME\s0  Retrieve only the reverse mappings for this \s-1SONAME\s0." 4
.IX Item "-s   SONAME  Retrieve only the reverse mappings for this SONAME."
.IP "" 4
.IP "\fB\-l\fR   \s-1LIBRARY\s0 Retrieve only the reverse mappings for this \s-1LIBRARY\s0." 4
.IX Item "-l   LIBRARY Retrieve only the reverse mappings for this LIBRARY."
.IP "" 4
.IP "\fB\-v\fR   Report all mappings, not just the mismatched ones." 4
.IX Item "-v   Report all mappings, not just the mismatched ones."
.IP "" 4
.ie n .IP "\fB\-e\fR   Limit the markings or report to only those executables in the current shell's $PATH." 4
.el .IP "\fB\-e\fR   Limit the markings or report to only those executables in the current shell's \f(CW$PATH\fR." 4
.IX Item "-e   Limit the markings or report to only those executables in the current shell's $PATH."
.IP "" 4
.IP "\fB\-m\fR   Prompt the user to mark the found object with the PaX flags of the source." 4
.IX Item "-m   Prompt the user to mark the found object with the PaX flags of the source."
.IP "" 4
.ie n .IP "\fB\-y\fR   Assume ""yes"" to all prompts for marking (\s-1USE\s0 \s-1CAREFULLY\s0!)" 4
.el .IP "\fB\-y\fR   Assume ``yes'' to all prompts for marking (\s-1USE\s0 \s-1CAREFULLY\s0!)" 4
.IX Item "-y   Assume yes to all prompts for marking (USE CAREFULLY!)"
.IP "" 4
.IP "\fB\-h\fR   Print out a short help message and exit." 4
.IX Item "-h   Print out a short help message and exit."
.PD
.SH "HOMEPAGE"
.IX Header "HOMEPAGE"
http://dev.gentoo.org/~blueness/elfix
.SH "REPORTING BUGS"
.IX Header "REPORTING BUGS"
Please report bugs at http://bugs.gentoo.org.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBscanelf\fR(1), \fBdumpelf\fR(1), \fBpaxctl\fR(1), \fBpspax\fR(1), \fBfix-gnustack\fR(1), \fBldd\fR(1)
.SH "AUTHORS"
.IX Header "AUTHORS"
\&\fBAnthony G. Basile\fR <blueness@gentoo.org>