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.TH reredirect 1 "26 Aug 2014"
.SH NAME
reredirect \- Tool to dynamically redirect outputs of a running process
.SH SYNOPSIS
.B reredirect [-m
.I FILE
.B |-o
.I FILE
.B |-e
.I FILE
.B |-O
.I FD
.B |-E
.I FD
.B ] [-N] [-d]
.I PID

.SH DESCRIPTION

.B reredirect
is a utility for taking an existing running program and
attaching its outputs (standard output and error output) to files or
another process.

Simple usage is:

    reredirect -m FILE PID

It will redirect outputs of 
.I PID
to 
.I FILE.
It is also possible to redirect standard
output and error output in different files:

    reredirect -o FILE1 -e FILE2 PID

.B \-m
option is just a shortcut to 
.B \-o FILE \-e FILE

After launched, reredirect, give you command to restore state of 
.I PID.
It will looks like:

    reredirect -N -O 5 -E 3 5453

.B \-O
and 
.B \-E
act as 
.B \-o 
and 
.B \-e 
but with already opened file descriptors in
.I PID.
They only used to restore previous state of 
.I PID.



.SH OPTIONS

.B \-o FILE
.IP
File to redirect stdout
.LP

.B \-e FILE
.IP
File to redirect stderr
.LP

.B \-m FILE
.IP
Same than 
.B \-o FILE \-e FILE
.LP

.B \-O FD
.IP
Redirect stdout to this file descriptor. Mainly used to restore process outputs
.LP

.B \-E FD
.IP
Redirect stderr to this file descriptor. Mainly used to restore process outputs
.LP

.B \-N
.IP
Do not save previous stream
.LP

.B \-V
.IP
Print the version of
.B reredirect
and exit.
.LP

.B \-h
.IP
Print a usage message and exit.
.LP

.B \-v
.IP
Print verbose debug output while running.
.LP

.SH NOTES

.B reredirect
depends on the
.BR ptrace (2)
system call to attach to the remote program. On Ubuntu Maverick and higher, this
ability is disabled by default for security reasons. You can enable it
temporarily by doing
.IP
 # echo 0 > /proc/sys/kernel/yama/ptrace_scope
.LP
as root, or permanently by editing the file
.IR /etc/sysctl.d/10-ptrace.conf ,
which also contains more information about this setting.

.SH BUGS

Bugs should be reported to the author (see below) or via the issue tracker on
GitHub.

.SH AUTHORS

reredirect was mainly written by Jérôme Pouiller <jezz@sysmic.org>. You can
contact hom for any questions or bug reports.

reredirect (and especially all ptrace layer) is based on reptyr programm. reptyr 
was written by Nelson Elhage <nelhage@nelhage.com>.

.SH HOMEPAGE

.URL http://github.com/jerome-pouiller/reredirect