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System Administration Commands in.rexecd(1M)
NAME
in.rexecd, rexecd - remote execution server
SYNOPSIS
in.rexecd
DESCRIPTION
in.rexecd is the server for the rexec(3SOCKET) routine. The
server provides remote execution facilities with authentica-
tion based on user names and passwords. It is invoked
automatically as needed by inetd(1M), and then executes the
following protocol:
1. The server reads characters from the socket up to a null
(\0) byte. The resultant string is interpreted as an
ASCII number, base 10.
2. If the number received in step 1 is non-zero, it is
interpreted as the port number of a secondary stream to
be used for the stderr. A second connection is then
created to the specified port on the client's machine.
3. A null terminated user name of at most 16 characters is
retrieved on the initial socket.
4. A null terminated password of at most 16 characters is
retrieved on the initial socket.
5. A null terminated command to be passed to a shell is
retrieved on the initial socket. The length of the com-
mand is limited by the upper bound on the size of the
system's argument list.
6. rexecd then validates the user as is done at login time
and, if the authentication was successful, changes to
the user's home directory, and establishes the user and
group protections of the user. If any of these steps
fail the connection is aborted and a diagnostic message
is returned.
7. A null byte is returned on the connection associated
with the stderr and the command line is passed to the
normal login shell of the user. The shell inherits the
network connections established by rexecd.
SunOS 5.10 Last change: 4 Nov 2004 1
System Administration Commands in.rexecd(1M)
USAGE
in.rexecd and rexecd are IPv6-enabled. See ip6(7P).
ATTRIBUTES
See attributes(5) for descriptions of the following attri-
butes:
____________________________________________________________
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|_____________________________|_____________________________|
| Availability | SUNWrcmds |
|_____________________________|_____________________________|
SEE ALSO
svcs(1), inetd(1M), inetadm(1M), svcadm(1M), rexec(3SOCKET),
attributes(5), smf(5), ip6(7P)
DIAGNOSTICS
All diagnostic messages are returned on the connection asso-
ciated with the stderr, after which any network connections
are closed. An error is indicated by a leading byte with a
value of 1 (0 is returned in step 7 above upon successful
completion of all the steps prior to the command execution).
username too long The name is longer than 16 charac-
ters.
password too long The password is longer than 16 char-
acters.
command too long The command line passed exceeds the
size of the argument list (as con-
figured into the system).
Login incorrect. No password file entry for the user
name existed.
Password incorrect. The wrong password was supplied.
No remote directory. The chdir command to the home direc-
tory failed.
SunOS 5.10 Last change: 4 Nov 2004 2
System Administration Commands in.rexecd(1M)
Try again. A fork by the server failed.
/usr/bin/sh: ... The user's login shell could not be
started.
NOTES
The in.rexecd service is managed by the service management
facility, smf(5), under the service identifier:
svc:/network/rexec:default
Administrative actions on this service, such as enabling,
disabling, or requesting restart, can be performed using
svcadm(1M). Responsibility for initiating and restarting
this service is delegated to inetd(1M). Use inetadm(1M) to
make configuration changes and to view configuration infor-
mation for this service. The service's status can be queried
using the svcs(1) command.
SunOS 5.10 Last change: 4 Nov 2004 3
Man(1) output converted with
man2html and wrapped by fishsponge
This page was generated on Wed Sep 12 11:26:30 GMT 2007
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