a2p
accept
access
acct
addftinfo
addr2line
adjtime
afmtodit
after
aio_cancel
aio_error
aio_read
aio_return
aio_suspend
aio_waitcomplete
aio_write
alias
aliases
alloc
anvil
append
apply
apropos
ar
array
as
asa
asn1parse
at
atq
atrm
attemptckalloc
attemptckrealloc
authlib
authtest
autopoint
awk
b64decode
b64encode
basename
batch
bc
bdes
bell
bg
bgerror
biff
big5
binary
bind
bindkey
bindtags
bindtextdomain
bio
bitmap
blowfish
bn
bootparams
bootptab
bounce
brandelf
break
breaksw
brk
bsdiff
bsdtar
bsnmpd
bspatch
bthost
btsockstat
buffer
builtin
builtins
bunzip2
button
byacc
bzcat
bzegrep
bzfgrep
bzgrep
bzip2
c2ph
c89
c99
ca
cal
calendar
canvas
cap_mkdb
case
cat
catch
catman
cc
cd
cdcontrol
chdir
checkbutton
checknr
chflags
chfn
chgrp
chio
chkey
chmod
chown
chpass
chroot
chsh
ci
ciphers
ckalloc
ckdist
ckfree
ckrealloc
cksum
cleanup
clear
clipboard
clock
clock_getres
clock_gettime
clock_settime
close
cmp
co
col
colcrt
colldef
colors
colrm
column
comm
command
compile_et
complete
compress
concat
config
connect
console
continue
core
courierlogger
couriertcpd
cp
cpan
cpio
cpp
creat
crl
crontab
crunchgen
crunchide
crypt
crypto
csh
csplit
ctags
ctm
ctm_dequeue
ctm_rmail
ctm_smail
cu
cursor
cursors
cut
cvs
date
dbiprof
dbiproxy
dc
dcgettext
dcngettext
dd
dde
default
defer
deliverquota
des
destroy
devfs
df
dgettext
dgst
dh
dhparam
dialog
diff
diff3
dig
dir
dirent
dirname
dirs
discard
disktab
dngettext
do
domainname
done
dprofpp
dsa
dsaparam
dtmfdecode
du
dup
dup2
eaccess
ec
ecdsa
echo
echotc
ecparam
ed
edit
editrc
ee
egrep
elf
elfdump
elif
else
enc
enc2xs
encoding
end
endif
endsw
engine
enigma
entry
env
envsubst
eof
eqn
err
errno
error
errstr
esac
ethers
euc
eui64
eval
event
evp
ex
exec
execve
exit
expand
export
exports
expr
extattr
extattr_delete_fd
extattr_delete_file
extattr_get_fd
extattr_get_file
extattr_set_fd
extattr_set_file
f77
false
famm
famx
fblocked
fbtab
fc
fchdir
fchflags
fchmod
fchown
fcntl
fconfigure
fcopy
fdescfs
fdformat
fdread
fdwrite
fetch
fg
fgrep
fhopen
fhstat
fhstatfs
fi
file
file2c
fileevent
filename
filetest
find
find2perl
finger
flex
flock
flush
fmt
focus
fold
font
fontedit
for
foreach
fork
format
forward
fpathconf
frame
from
fs
fstab
fstat
fstatfs
fsync
ftp
ftpchroot
ftpusers
ftruncate
futimes
g711conv
gb2312
gb18030
gbk
gcc
gcore
gcov
gdb
gencat
gendsa
genrsa
gensnmptree
getconf
getdents
getdirentries
getdtablesize
getegid
geteuid
getfacl
getfh
getfsstat
getgid
getgroups
getitimer
getlogin
getopt
getopts
getpeername
getpgid
getpgrp
getpid
getppid
getpriority
getresgid
getresuid
getrlimit
getrusage
gets
getsid
getsockname
getsockopt
gettext
gettextize
gettimeofday
gettytab
getuid
glob
global
gmake
goto
gperf
gprof
grab
grep
grid
grn
grodvi
groff
groff_font
groff_out
groff_tmac
grog
grolbp
grolj4
grops
grotty
group
groups
gunzip
gzcat
gzexe
gzip
h2ph
h2xs
hash
hashstat
hd
head
help2man
hesinfo
hexdump
history
host
hostname
hosts
hosts_access
hosts_options
hpftodit
http
hup
i386_get_ioperm
i386_get_ldt
i386_set_ioperm
i386_set_ldt
i386_vm86
iconv
id
ident
idprio
if
ifnames253
ifnames259
image
imapd
incr
indent
indxbib
info
infokey
inode
install
instmodsh
interp
intro
introduction
ioctl
ipcrm
ipcs
ipf
ipftest
ipnat
ippool
ipresend
issetugid
jail
jail_attach
jobid
jobs
join
jot
kbdcontrol
kbdmap
kcon
kdestroy
kdump
kenv
kevent
keycap
keylogin
keylogout
keymap
keysyms
kgdb
kill
killall
killpg
kinit
kldfind
kldfirstmod
kldload
kldnext
kldstat
kldsym
kldunload
klist
kpasswd
kqueue
kse
kse_create
kse_exit
kse_release
kse_switchin
kse_thr_interrupt
kse_wakeup
ktrace
label
labelframe
lam
lappend
last
lastcomm
lastlog
lchflags
lchmod
lchown
ld
ldap
ldapadd
ldapcompare
ldapdelete
ldapmodify
ldapmodrdn
ldappasswd
ldapsearch
ldapwhoami
ldd
leave
less
lesskey
lex
lgetfh
lhash
libnetcfg
library
limit
limits
lindex
link
linprocfs
linsert
lint
lio_listio
list
listbox
listen
lj4_font
lkbib
llength
lmtp
ln
load
loadfont
local
locale
locate
lock
lockf
log
logger
login
logins
logname
logout
look
lookbib
lorder
lower
lp
lpq
lpr
lprm
lptest
lrange
lreplace
ls
lsearch
lseek
lset
lsort
lstat
lsvfs
lutimes
lynx
m4
madvise
magic
mail
maildiracl
maildirkw
maildirmake
mailq
mailx
make
makeinfo
makewhatis
man
manpath
master
mc
mcedit
mcview
md2
md4
md5
mdc2
memory
menu
menubar
menubutton
merge
mesg
message
mincore
minherit
minigzip
mkdep
mkdir
mkfifo
mkimapdcert
mklocale
mknod
mkpop3dcert
mkstr
mktemp
mlock
mlockall
mmap
mmroff
modfind
modfnext
modnext
modstat
moduli
more
motd
mount
mprotect
mptable
msdos
msdosfs
msgattrib
msgcat
msgcmp
msgcomm
msgconv
msgen
msgexec
msgfilter
msgfmt
msggrep
msginit
msgmerge
msgs
msgunfmt
msguniq
mskanji
msql2mysql
msync
mt
munlock
munlockall
munmap
mv
myisamchk
myisamlog
myisampack
mysql
mysqlaccess
mysqladmin
mysqlbinlog
mysqlcheck
mysqld
mysqldump
mysqld_multi
mysqld_safe
mysqlhotcopy
mysqlimport
mysqlshow
mysql_config
mysql_fix_privilege_tables
mysql_zap
namespace
nanosleep
nawk
nc
ncal
ncplist
ncplogin
ncplogout
neqn
netconfig
netgroup
netid
netstat
networks
newaliases
newgrp
nex
nfsstat
nfssvc
ngettext
nice
nl
nm
nmount
nohup
nologin
notify
nroff
nseq
nslookup
ntp_adjtime
ntp_gettime
nvi
nview
objcopy
objdump
objformat
ocsp
od
onintr
open
openssl
opieaccess
opieinfo
opiekey
opiekeys
opiepasswd
option
options
oqmgr
pack
package
packagens
pagesize
palette
pam_auth
panedwindow
parray
passwd
paste
patch
pathchk
pathconf
pawd
pax
pbm
pcre
pcreapi
pcrebuild
pcrecallout
pcrecompat
pcrecpp
pcregrep
pcrematching
pcrepartial
pcrepattern
pcreperform
pcreposix
pcreprecompile
pcresample
pcretest
perl
perl56delta
perl58delta
perl561delta
perl570delta
perl571delta
perl572delta
perl573delta
perl581delta
perl582delta
perl583delta
perl584delta
perl585delta
perl586delta
perl587delta
perl588delta
perl5004delta
perl5005delta
perlaix
perlamiga
perlapi
perlapio
perlapollo
perlartistic
perlbeos
perlbook
perlboot
perlbot
perlbs2000
perlbug
perlcall
perlcc
perlce
perlcheat
perlclib
perlcn
perlcompile
perlcygwin
perldata
perldbmfilter
perldebguts
perldebtut
perldebug
perldelta
perldgux
perldiag
perldoc
perldos
perldsc
perlebcdic
perlembed
perlepoc
perlfaq
perlfaq1
perlfaq2
perlfaq3
perlfaq4
perlfaq5
perlfaq6
perlfaq7
perlfaq8
perlfaq9
perlfilter
perlfork
perlform
perlfreebsd
perlfunc
perlglossary
perlgpl
perlguts
perlhack
perlhist
perlhpux
perlhurd
perlintern
perlintro
perliol
perlipc
perlirix
perlivp
perljp
perlko
perllexwarn
perllinux
perllocale
perllol
perlmachten
perlmacos
perlmacosx
perlmint
perlmod
perlmodinstall
perlmodlib
perlmodstyle
perlmpeix
perlnetware
perlnewmod
perlnumber
perlobj
perlop
perlopenbsd
perlopentut
perlos2
perlos390
perlos400
perlothrtut
perlpacktut
perlplan9
perlpod
perlpodspec
perlport
perlqnx
perlre
perlref
perlreftut
perlrequick
perlreref
perlretut
perlrun
perlsec
perlsolaris
perlstyle
perlsub
perlsyn
perlthrtut
perltie
perltoc
perltodo
perltooc
perltoot
perltrap
perltru64
perltw
perlunicode
perluniintro
perlutil
perluts
perlvar
perlvmesa
perlvms
perlvos
perlwin32
perlxs
perlxstut
perror
pfbtops
pftp
pgrep
phones
photo
pic
pickup
piconv
pid
pipe
pkcs7
pkcs8
pkcs12
pkg_add
pkg_check
pkg_create
pkg_delete
pkg_info
pkg_sign
pkg_version
pkill
pl2pm
place
pod2html
pod2latex
pod2man
pod2text
pod2usage
podchecker
podselect
poll
popd
popup
posix_madvise
postalias
postcat
postconf
postdrop
postfix
postkick
postlock
postlog
postmap
postqueue
postsuper
pr
pread
preadv
printcap
printenv
printf
proc
procfs
profil
protocols
prove
proxymap
ps
psed
psroff
pstruct
ptrace
publickey
pushd
puts
pwd
pwrite
pwritev
qmgr
qmqpd
quota
quotactl
radiobutton
raise
rand
ranlib
rcp
rcs
rcsclean
rcsdiff
rcsfile
rcsfreeze
rcsintro
rcsmerge
read
readelf
readlink
readonly
readv
realpath
reboot
recv
recvfrom
recvmsg
red
ree
refer
regexp
registry
regsub
rehash
remote
rename
repeat
replace
req
reset
resolver
resource
return
rev
revoke
rfcomm_sppd
rfork
rhosts
ripemd
ripemd160
rlog
rlogin
rm
rmd160
rmdir
rpc
rpcgen
rs
rsa
rsautl
rsh
rtld
rtprio
rup
ruptime
rusers
rwall
rwho
s2p
safe
sasl
sasldblistusers2
saslpasswd2
sbrk
scache
scale
scan
sched
sched_getparam
sched_getscheduler
sched_get_priority_max
sched_get_priority_min
sched_rr_get_interval
sched_setparam
sched_setscheduler
sched_yield
scon
scp
script
scrollbar
sdiff
sed
seek
select
selection
semctl
semget
semop
send
sendbug
sendfile
sendmail
sendmsg
sendto
services
sess_id
set
setegid
setenv
seteuid
setfacl
setgid
setgroups
setitimer
setlogin
setpgid
setpgrp
setpriority
setregid
setresgid
setresuid
setreuid
setrlimit
setsid
setsockopt
settc
settimeofday
setty
setuid
setvar
sftp
sh
sha
sha1
sha256
shar
shells
shift
shmat
shmctl
shmdt
shmget
showq
shutdown
sigaction
sigaltstack
sigblock
sigmask
sigpause
sigpending
sigprocmask
sigreturn
sigsetmask
sigstack
sigsuspend
sigvec
sigwait
size
slapadd
slapcat
slapd
slapdn
slapindex
slappasswd
slaptest
sleep
slogin
slurpd
smbutil
smime
smtp
smtpd
socket
socketpair
sockstat
soelim
sort
source
spawn
speed
spinbox
spkac
splain
split
squid
squid_ldap_auth
squid_ldap_group
squid_unix_group
sscop
ssh
sshd_config
ssh_config
stab
startslip
stat
statfs
stop
string
strings
strip
stty
su
subst
sum
suspend
swapoff
swapon
switch
symlink
sync
sysarch
syscall
sysconftool
sysconftoolcheck
systat
s_client
s_server
s_time
tabs
tail
talk
tar
tbl
tclsh
tcltest
tclvars
tcopy
tcpdump
tcpslice
tcsh
tee
tell
telltc
telnet
term
termcap
terminfo
test
texindex
texinfo
text
textdomain
tfmtodit
tftp
then
threads
time
tip
tk
tkerror
tkvars
tkwait
tlsmgr
tmac
top
toplevel
touch
tput
tr
trace
trafshow
trap
troff
true
truncate
truss
tset
tsort
tty
ttys
type
tzfile
ui
ul
ulimit
umask
unalias
uname
uncomplete
uncompress
undelete
unexpand
unhash
unifdef
unifdefall
uniq
units
unknown
unlimit
unlink
unmount
unset
unsetenv
until
unvis
update
uplevel
uptime
upvar
usbhidaction
usbhidctl
users
utf8
utimes
utmp
utrace
uudecode
uuencode
uuidgen
vacation
variable
verify
version
vfork
vgrind
vgrindefs
vi
vidcontrol
vidfont
view
virtual
vis
vt220keys
vwait
w
wait
wait3
wait4
waitpid
wall
wc
wget
what
whatis
where
whereis
which
while
who
whoami
whois
window
winfo
wish
wm
write
writev
wtmp
x509
xargs
xgettext
xmlwf
xstr
xsubpp
yacc
yes
ypcat
ypchfn
ypchpass
ypchsh
ypmatch
yppasswd
ypwhich
yyfix
zcat
zcmp
zdiff
zegrep
zfgrep
zforce
zgrep
zmore
znew
_exit
__syscall
 
FreeBSD/Linux/UNIX General Commands Manual
Hypertext Man Pages
ctm_smail
 
CTM_MAIL(1)		FreeBSD General Commands Manual 	   CTM_MAIL(1)

NAME
     ctm_smail, ctm_dequeue, ctm_rmail -- send and receive ctm(1) deltas via
     mail

SYNOPSIS
     ctm_smail [-l log] [-m maxmsgsize] [-c maxctmsize] [-q queue-dir]
	       ctm-delta mail-alias
     ctm_dequeue [-l log] [-n numchunks] queue-dir
     ctm_rmail [-Dfuv] [-l log] [-p piecedir] [-d deltadir] [-b basedir]
	       [file ...]

DESCRIPTION
     In conjunction with the ctm(1) command, ctm_smail, ctm_dequeue and
     ctm_rmail are used to distribute changes to a source tree via email.  The
     ctm_smail utility is given a compressed ctm delta, and a mailing list to
     send it to.  It splits the delta into manageable pieces, encodes them as
     mail messages and sends them to the mailing list (optionally queued to
     spread the mail load).  Each recipient uses ctm_rmail (either manually or
     automatically) to decode and reassemble the delta, and optionally call
     ctm to apply it to the source tree.  At the moment, several source trees
     are distributed, and by several sites.  These include the FreeBSD-current
     source and CVS trees, distributed by freefall.FreeBSD.org.

     Command line arguments for ctm_smail:

     -l log  Instead of appearing on stderr, error diagnostics and informa-
	     tional messages (other than command line errors) are time stamped
	     and written to the file log.

     -m maxmsgsize
	     Limit the maximum size mail message that ctm_smail is allowed to
	     send.  It is approximate since mail headers and other niceties
	     are not counted in this limit.  If not specified, it will default
	     to 64000 bytes, leaving room for 1535 bytes of headers before the
	     rumoured 64k mail limit.

     -c maxctmsize
	     Limit the maximum size delta that will be sent.  Deltas bigger
	     that this limit will cause an apology mail message to be sent to
	     the mailing list.	This is to prevent massive changes overwhelm-
	     ing users' mail boxes.  Note that this is the size before encod-
	     ing.  Encoding causes a 4/3 size increase before mail headers are
	     added.  If not specified, there is no limit.

     -q queue-dir
	     Instead of mailing the delta pieces now, store them in the given
	     directory to be mailed later using ctm_dequeue.  This feature
	     allows the mailing of large deltas to be spread out over hours or
	     even days to limit the impact on recipients with limited network
	     bandwidth or small mail spool areas.

     ctm-delta is the delta to be sent, and mail-alias is the mailing list to
     send the delta to.  The mail messages are sent using sendmail(8).

     Command line arguments for ctm_dequeue:

     -l log  Instead of appearing on stderr, error diagnostics and informa-
	     tional messages (other than command line errors) are time stamped
	     and written to the file log.

     -n numchunks
	     Limit the number of mail messages that ctm_dequeue will send per
	     run.  By default, ctm_dequeue will send one mail message per run.

     queuedir is the directory containing the mail messages stored by
     ctm_smail.  Up to numchunks mail messages will be sent in each run.  The
     recipient mailing list is already encoded in the queued files.

     It is safe to run ctm_dequeue while ctm_smail is adding entries to the
     queue, or even to run ctm_smail multiple times concurrently, but a sepa-
     rate queue directory should be used for each tree being distributed.
     This is because entries are served in alphabetical order, and one tree
     will be unfairly serviced before any others, based on the delta names,
     not delta creation times.

     Command line arguments for ctm_rmail:

     -l log  Instead of appearing on stderr, error diagnostics and informa-
	     tional messages (other than command line errors) are time stamped
	     and written to the file log.

     -p piecedir
	     Collect pieces of deltas in this directory.  Each piece corre-
	     sponds to a single mail message.  Pieces are removed when com-
	     plete deltas are built.  If this flag is not given, no input
	     files will be read, but completed deltas may still be applied
	     with ctm if the -b flag is given.

     -d deltadir
	     Collect completed deltas in this directory.  Deltas are built
	     from one or more pieces when all pieces are present.

     -b basedir
	     Apply any completed deltas to this source tree.  If this flag is
	     not given, deltas will be stored, but not applied.  The user may
	     then apply the deltas manually, or by using ctm_rmail without the
	     -p flag.  Deltas will not be applied if they do not match the
	     .ctm_status file in basedir (or if .ctm_status does not exist).

     -D      Delete deltas after successful application by ctm.  It is proba-
	     bly a good idea to avoid this flag (and keep all the deltas) as
	     ctm has the ability to recover small groups of files from a full
	     set of deltas.

     -f      Fork and execute in the background while applying deltas with
	     ctm.  This is useful when automatically invoking ctm_rmail from
	     sendmail because ctm can take a very long time to complete, caus-
	     ing other people's mail to be delayed, and can in theory cause
	     spurious mail retransmission due to the remote sendmail timing
	     out, or even termination of ctm_rmail by mail filters such as
	     MH's slocal.  Do not worry about zillions of background ctm pro-
	     cesses loading your machine, since locking is used to prevent
	     more than one ctm invocation at a time.

     -u      Pass the -u flag to the ctm command when applying the complete
	     deltas, causing it to set the modification time of created and
	     modified files to the CTM delta creation time.

     -v      Pass the -v flag to the ctm command when applying the complete
	     deltas, causing a more informative output.  All ctm output
	     appears in the ctm_rmail log file.

     The file arguments (or stdin, if there are none) are scanned for delta
     pieces.  Multiple delta pieces can be read from a single file, so an
     entire maildrop can be scanned and processed with a single command.

     It is safe to invoke ctm_rmail multiple times concurrently (with differ-
     ent input files), as might happen when sendmail is delivering mail asyn-
     chronously.  This is because locking is used to keep things orderly.

FILE FORMAT
     Following are the important parts of an actual (very small) delta piece:

     From: owner-src-cur
     To: src-cur
     Subject: ctm-mail src-cur.0003.gz 1/4

     CTM_MAIL BEGIN src-cur.0003.gz 1 4
     H4sIAAAAAAACA3VU72/bNhD9bP0VByQoEiyRSZEUSQP9kKTeYCR2gDTdsGFAwB/HRogtG5K8NCj6
     v4+UZSdtUQh6Rz0eee/xaF/dzx8up3/MFlDkBNrGnbttAwyo1pxoRgoiBNX/QJ5d3c9/X8DcPGGo
     lggkPiXngE4W1gUjKPJCYyk5MZRbIqmNW/ASglIFcdwIzTUxaAqhnCPcBqloKEkJVNDMF0Azk+Bo
     dDzzk0Ods/+A5gXv9YyJHjMCtJwQNeESNma7hOmXDRxn
     CTM_MAIL END 61065

     The subject of the message always begins with ``ctm-mail'' followed by
     the name of the delta, which piece this is, and how many total pieces
     there are.  The data are bracketed by ``CTM_MAIL BEGIN'' and ``CTM_MAIL
     END'' lines, duplicating the information in the subject line, plus a sim-
     ple checksum.

     If the delta exceeds maxctmsize, then a message like this will be
     received instead:

     From: owner-src-cur
     To: src-cur
     Subject: ctm-notice src-cur.0999.gz

     src-cur.0999.gz is 792843 bytes.  The limit is 300000 bytes.

     You can retrieve this delta via ftp.

     You are then on your own!

ENVIRONMENT
     If deltas are to be applied then ctm(1) and gunzip(1) must be in your
     PATH.

FILES
     QUEUEDIR/*
	     Pieces of deltas encoded as mail messages waiting to be sent to
	     the mailing list.

     PIECEDIR/*
	     Pieces of deltas waiting for the rest to arrive.

     DELTADIR/*
	     Completed deltas.

     BASEDIR/.ctm_status
	     File containing the name and number of the next delta to be
	     applied to this source tree.

EXIT STATUS
     The ctm_smail, ctm_dequeue and ctm_rmail utilities return exit status 0
     for success, and 1 for various failures.  The ctm_rmail utility is
     expected to be called from a mail transfer program, and thus signals
     failure only when the input mail message should be bounced (preferably
     into your regular maildrop, not back to the sender).  In short, failure
     to apply a completed delta with ctm is not considered an error important
     enough to bounce the mail, and ctm_rmail returns an exit status of 0.

EXAMPLES
     To send delta 32 of src-cur to a group of wonderful code hackers known to
     sendmail as src-guys, limiting the mail size to roughly 60000 bytes, you
     could use:

	   ctm_smail -m 60000 /wherever/it/is/src-cur.0032.gz src-guys

     To decode every ctm-mail message in your mailbox, assemble them into com-
     plete deltas, then apply any deltas built or lying around, you could use:

	   ctm_rmail -p ~/pieces -d ~/deltas -b /usr/ctm-src-cur $MAIL

     (Note that no messages are deleted by ctm_rmail.  Any mail reader could
     be used for that purpose.)

     To create a mail alias called receiver-dude that will automatically
     decode and assemble deltas, but not apply them, you could put the follow-
     ing lines in your /etc/mail/aliases file (assuming the /ctm/tmp and
     /ctm/deltas directories and /ctm/log file are writable by user daemon or
     group wheel):

	   receiver-dude: "|ctm_rmail -p /ctm/tmp -d /ctm/deltas -l /ctm/log"
	   owner-receiver-dude: real_dude@wherever.you.like

     The second line will catch failures and drop them into your regular mail-
     box, or wherever else you like.

     To apply all the deltas collected, and delete those applied, you could
     use:

	   ctm_rmail -D -d /ctm/deltas -b /ctm/src-cur -l /ctm/apply.log

     For maximum flexibility, consider this excerpt from a procmail script:

	   PATH=$HOME/bin:$PATH

	   :0 w
	   * ^Subject: ctm-mail cvs-cur
	   | ctm_incoming

     together with the shell script ~/bin/ctm_incoming:

	   #! /bin/sh
	   PATH="$HOME/bin:/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin"
	   export PATH

	   cd $HOME/ctm && ctm_rmail -f -p pieces -d deltas -l log -b /ctm

     which will deposit all ctm deltas in ~/ctm/deltas, apply them to the tree
     in /ctm, and drop any failures into your regular mail box.  Note the PATH
     manipulation in ctm_incoming which allows ctm_rmail to execute ctm(1) on
     the (non-FreeBSD) machine that this example was taken from.

SECURITY
     On its own, CTM is an insecure protocol - there is no authentication per-
     formed that the changes applied to the source code were sent by a trusted
     party, and so care should be taken if the CTM deltas are obtained via an
     unauthenticated medium such as regular email.  It is a relatively simple
     matter for an attacker to forge a CTM delta to replace or precede the
     legitimate one and insert malicious code into your source tree.  If the
     legitimate delta is somehow prevented from arriving, this will go unno-
     ticed until a later delta attempts to touch the same file, at which point
     the MD5 checksum will fail.

     To remedy this insecurity, CTM delta pieces generated by FreeBSD.org are
     cryptographically signed in a format compatible with the GNU Privacy
     Guard utility, available in /usr/ports/security/gpg, and the Pretty Good
     Privacy v5 utility, /usr/ports/security/pgp5.  The relevant public key
     can be obtained by fingering ctm@FreeBSD.org.

     CTM deltas which are thus signed cannot be undetectably altered by an
     attacker.	Therefore it is recommended that you make use of GPG or PGP5
     to verify the signatures if you receive your CTM deltas via email.

DIAGNOSTICS
     In normal operation, ctm_smail will report messages like:

	   ctm_smail: src-cur.0250.gz 1/2 sent to src-guys

     or, if queueing,

	   ctm_smail: src-cur.0250.gz 1/2 queued for src-guys

     The ctm_dequeue utility will report messages like:

	   ctm_dequeue: src-cur.0250.gz 1/2 sent

     The ctm_rmail utility will report messages like:

	   ctm_rmail: src-cur.0250.gz 1/2 stored
	   ctm_rmail: src-cur.0250.gz 2/2 stored
	   ctm_rmail: src-cur.0250.gz complete

     If any of the input files do not contain a valid delta piece, ctm_rmail
     will report:

	   ctm_rmail: message contains no delta

     and return an exit status of 1.  You can use this to redirect wayward
     messages back into your real mailbox if your mail filter goes wonky.

     These messages go to stderr or to the log file.  Messages from ctm(1)
     turn up here too.	Error messages should be self explanatory.

SEE ALSO
     ctm(1), ctm(5)

AUTHORS
     Stephen McKay 

FreeBSD 6.1		       January 24, 1995 		   FreeBSD 6.1
=2070
+421
(220)