RCMDSH(3) BSD Programmer's Manual RCMDSH(3)
rcmdsh - return a stream to a remote command without superuser
#include <unistd.h> int rcmdsh(char **ahost, int inport, const char *locuser, const char *remuser, const char *cmd, char *rshprog);
The rcmdsh() function is used by normal users to execute a command on a remote machine using an authentication scheme based on reserved port numbers using rsh(1) or the value of rshprog (if non-null). rshprog may be a fully-qualified path, a non-qualified command, or a command contain- ing space-separated command line arguments. The rcmdsh() function looks up the host *ahost using gethostbyname(3), returning -1 if the host does not exist. Otherwise *ahost is set to the standard name of the host and a connection is established to a server residing at the well-known Internet port shell/tcp (or whatever port is used by rshprog). The parameter inport is ignored; it is only included to provide an interface similar to rcmd(3). If the connection succeeds, a socket in the UNIX domain of type SOCK_STREAM is returned to the caller, and given to the remote command as stdin and stdout, and stderr.
The rcmdsh() function returns a valid socket descriptor on success. It returns -1 on error and prints a diagnostic message on the standard er- ror.
rsh(1), socketpair(2), rcmd(3), rshd(8)
The rcmdsh() function first appeared in OpenBSD 2.0.
If rsh(1) encounters an error, a file descriptor is still returned in- stead of -1. MirOS BSD #10-current May 5, 2003 1
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