RCMD STOCK MANUAL
RCMD STOCK CODE

│ rresvport(), rresvport_af() │ Thread safety │ MT-Safe │ │ rcmd(), rcmd_af() │ Thread safety │ MT-Unsafe │

RCMD STOCK CODE

The error code EAGAIN is overloaded to mean: 'Allįor information on the return from ruserok() and iruserok(), seeįor an explanation of the terms used in this section, see On failure, it returns -1 and sets errno to indicate The rresvport() function returns a valid, bound socket descriptor It returns -1 on error and prints a diagnostic message on the The rcmd() function returns a valid socket descriptor on success. InĪddition, rcmd_af() supports the use of AF_UNSPEC. The af argument can be specified as AF_INET or AF_INET6. The socket address family to be specified. The '_af' variants take an extra argument that allows Trusting the DNS server for the remote host's domain.Īll of the functions described above work with IPv4 ( AF_INET) If the IP address of the remote host is known, iruserok() shouldīe used in preference to ruserok(), as it does not require Is the same as the remote domain, only the machine name need be If the local domain (as obtained from gethostname(2)) rhosts file otherwise iruserok() and ruserok() Listed in the hosts.equiv file, or the host and remote usernameĪre found in the. If this file does not exist, is not a regular file, is owned byĪnyone other than the user or the superuser, is writable byĪnyone other than the owner, or is hardlinked anywhere, the checkĪutomatically fails. rhosts in the local user's home directory isĬhecked to see if the request for service is allowed. Then, if the user is not the superuser, it checks the Indicating whether the local user's name is that of the The iruserok() and ruserok() functions take a remote host's IPĪddress or name, respectively, two usernames and a flag Range on (successful) return, it contains the port number that Used as the starting point for a circular search of the port The portĪrgument is value-result: the value it supplies to the call is Restricts its search to the ports from 512 to 1023. In the glibc implementation, this function Namespace governing its network namespace) is allowed to bind toĪ privileged port. Process that has the CAP_NET_BIND_SERVICE capability in the user The rresvport() function is used to obtain a socket with a The protocol is described in detail in rshd(8). Made for sending arbitrary signals to the remote process,Īlthough you may be able to get its attention by using out-of. If fd2p is 0, then the stderr (unit 2 of the remoteĬommand) will be made the same as the stdout and no provision is Signal numbers, to be forwarded to the process group of theĬommand. Will return diagnostic output from the command (unit 2) on thisĬhannel, and will also accept bytes on this channel as being UNIX If fd2p is nonzero, then anĪuxiliary channel to a control process will be set up, and a fileĭescriptor for it will be placed in *fd2p. Type SOCK_STREAM is returned to the caller, and given to the If the connection succeeds, a socket in the Internet domain of

Otherwise, *ahost is set to the standard name of the host and aĬonnection is established to a server residing at the well-known Gethostbyname(3), returning -1 if the host does not exist. The rcmd() function looks up the host *ahost using Servers to authenticate clients requesting service with rcmd().Īll four functions are used by the rshd(8) server (among others). The iruserok() and ruserok() functions are used by The rresvport() function returns a fileĭescriptor to a socket with an address in the privileged port On a remote machine using an authentication scheme based on The rcmd() function is used by the superuser to execute a command Rcmd(), rcmd_af(), rresvport(), rresvport_af(), iruserok(), Int rcmd(char **restrict ahost, unsigned short inport, const char *restrict locuser, const char *restrict remuser, const char *restrict cmd, int *restrict fd2p ) int rresvport(int * port ) int iruserok(uint32_t raddr, int superuser, const char * ruser, const char * luser ) int ruserok(const char * rhost, int superuser, const char * ruser, const char * luser ) int rcmd_af(char **restrict ahost, unsigned short inport, const char *restrict locuser, const char *restrict remuser, const char *restrict cmd, int *restrict fd2p, sa_family_t af ) int rresvport_af(int * port, sa_family_t af ) int iruserok_af(const void *restrict raddr, int superuser, const char *restrict ruser, const char *restrict luser, sa_family_t af ) int ruserok_af(const char * rhost, int superuser, const char * ruser, const char * luser, sa_family_t af ) įeature Test Macro Requirements for glibc (see SYNOPSIS top #include /* Or on some systems */ Iruserok_af, ruserok_af - routines for returning a stream to a Rcmd, rresvport, iruserok, ruserok, rcmd_af, rresvport_af,

RCMD STOCK MANUAL

Rcmd(3) Library Functions Manual rcmd(3) NAME top

Rcmd stock