rexec(3N)

rexec -- return stream to a remote command

Synopsis

cc [options] file -lsocket -lnsl

#include <netdb.h>

int rexec(char **ahost, int inport, char *user, char *passwd,
	char *cmd, int *fd2p);

Description

rexec looks up the host ahost using gethostbyname (see gethostent(3N)), returning -1 if the host does not exist. Otherwise, ahost is set to the standard name of the host. The parameters are:

ahost: points to the pointer for the host
inport: well-known port used for this connection; this must be in network byte order
user: points to the user name
passwd: points to the password for the specified user name
cmd: points to the command to be executed
fd2p: points to the descriptor for the control process

If a username and password are both specified, then these are used to authenticate to the foreign host; otherwise, the .netrc file in the user's home directory is searched for appropriate information. If this fails, the user is prompted for the information.

The port inport specifies which well-known DARPA Internet port to use for the connection. The protocol for connection is described in detail in rexecd.

If the call succeeds, a socket of type SOCK_STREAM is returned to the caller, and given to the remote command as its standard input and standard output. If fd2p is non-zero, then an auxiliary channel to a control process will be set up, and a descriptor for it will be placed in fd2p. The control process will return diagnostic output from the command (unit 2) on this channel, and will also accept bytes on this channel as signal numbers, to be forwarded to the process group of the command. If fd2p is 0, then the standard error (unit 2 of the remote command) will be made the same as its standard output and no provision is made for sending arbitrary signals to the remote process, although you may be able to get its attention by using out-of-band data.

Files

/usr/lib/locale/locale/LC_MESSAGES/uxnsl

References

gethostent(3N), getservent(3N), rcmd(3N), rexecd(1Mtcp)

Notices

There is no way to specify options to the socket call that rexec makes.