1in.rexecd(1M) System Administration Commands in.rexecd(1M)
2
6 in.rexecd, rexecd - remote execution server
7
9 in.rexecd
10
13 in.rexecd is the server for the rexec(3SOCKET) routine. The server
14 provides remote execution facilities with authentication based on user
15 names and passwords. It is invoked automatically as needed by
16 inetd(1M), and then executes the following protocol:
17 1. The server reads characters from the socket up to a null
19 (\0) byte. The resultant string is interpreted as an ASCII
20 number, base 10.
21 2. If the number received in step 1 is non-zero, it is inter‐
23 preted as the port number of a secondary stream to be used
24 for the stderr. A second connection is then created to the
25 specified port on the client's machine.
26 3. A null terminated user name of at most 16 characters is
28 retrieved on the initial socket.
29 4. A null terminated password of at most 16 characters is
31 retrieved on the initial socket.
32 5. A null terminated command to be passed to a shell is
34 retrieved on the initial socket. The length of the command
35 is limited by the upper bound on the size of the system's
36 argument list.
37 6. rexecd then validates the user as is done at login time and,
39 if the authentication was successful, changes to the user's
40 home directory, and establishes the user and group protec‐
41 tions of the user. If any of these steps fail the connection
42 is aborted and a diagnostic message is returned.
43 7. A null byte is returned on the connection associated with
45 the stderr and the command line is passed to the normal
46 login shell of the user. The shell inherits the network
47 connections established by rexecd.
48
50 in.rexecd and rexecd are IPv6-enabled. See ip6(7P).
51
53 See attributes(5) for descriptions of the following attributes:
54 ┌─────────────────────────────┬─────────────────────────────┐
59 │ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
60 ├─────────────────────────────┼─────────────────────────────┤
61 │Availability │SUNWrcmds │
62 └─────────────────────────────┴─────────────────────────────┘
63
65 svcs(1), inetd(1M), inetadm(1M), svcadm(1M), rexec(3SOCKET),
66 attributes(5), smf(5), ip6(7P)
67
69 All diagnostic messages are returned on the connection associated with
70 the stderr, after which any network connections are closed. An error is
71 indicated by a leading byte with a value of 1 (0 is returned in step 7
72 above upon successful completion of all the steps prior to the command
73 execution).
74 username too long The name is longer than 16 characters.
76 password too long The password is longer than 16 characters.
79 command too long The command line passed exceeds the size of the
82 argument list (as configured into the system).
83 Login incorrect. No password file entry for the user name
86 existed.
87 Password incorrect. The wrong password was supplied.
90 No remote directory. The chdir command to the home directory failed.
93 Try again. A fork by the server failed.
96 /usr/bin/sh: ... The user's login shell could not be started.
99
102 The in.rexecd service is managed by the service management facility,
103 smf(5), under the service identifier:
104 svc:/network/rexec:default
106 Administrative actions on this service, such as enabling, disabling, or
111 requesting restart, can be performed using svcadm(1M). Responsibility
112 for initiating and restarting this service is delegated to inetd(1M).
113 Use inetadm(1M) to make configuration changes and to view configuration
114 information for this service. The service's status can be queried using
115 the svcs(1) command.
116SunOS 5.11 4 Nov 2004 in.rexecd(1M)