upscli_connect(3) [minix man page]

UPSCLI_CONNECT(3)						    NUT Manual							 UPSCLI_CONNECT(3)

NAME

       upscli_connect - Open a connection to a NUT upsd

SYNOPSIS

       #include <upsclient.h>

       int upscli_connect(UPSCONN_t *ups, const char *host, int port, int flags);

DESCRIPTION

       The upscli_connect() function takes the pointer ups to a UPSCONN_t state structure and opens a TCP connection to the host on the given
       port.

       flags may be either UPSCLI_CONN_TRYSSL to try a SSL connection, or UPSCLI_CONN_REQSSL to require a SSL connection.

       If SSL mode is required, this function will only return successfully if it is able to establish a SSL connection with the server. Possible
       reasons for failure include no SSL support on the server, and if upsclient itself hasn't been compiled with SSL support.

       You must call upscli_disconnect(3) when finished with a connection, or your program will slowly leak memory and file descriptors.

RETURN VALUE

       The upscli_connect() function modifies the UPSCONN_t structure and returns 0 on success, or -1 if an error occurs.

SEE ALSO

       upscli_disconnect(3), upscli_fd(3), upscli_splitaddr(3), upscli_splitname(3), upscli_ssl(3), upscli_strerror(3), upscli_upserror(3)

Network UPS Tools						    05/22/2012							 UPSCLI_CONNECT(3)

UPSCLIENT(3)							    NUT Manual							      UPSCLIENT(3)

NAME

       upsclient - Network UPS Tools client access library

DESCRIPTION

       The Network UPS Tools (NUT) upsclient library provides a number of useful functions for programs to use when communicating with upsd(8).
       Many of the low-level socket and protocol details are handled automatically when using this interface.

       State is maintained across calls in an opaque structure called UPSCONN_t. Callers are expected to create one per connection. These will be
       provided to most of the upsclient functions. The format of this structure is subject to change, and client programs must not reference
       elements within it directly.

NETWORK FUNCTIONS

       To create a new connection, use upscli_connect(3). This will also initialize the UPSCONN_t structure. To verify that a connection has been
       established later, upscli_fd(3) can be used to return the file descriptor. Clients wishing to check for the presence and operation of SSL
       on a connection may call upscli_ssl(3).

       The majority of clients will use upscli_get(3) to retrieve single items from the server. To retrieve a list, use upscli_list_start(3) to
       get it started, then call upscli_list_next(3) for each element.

       Raw lines of text may be sent to upsd(8) with upscli_sendline(3). Reading raw lines is possible with upscli_readline(3). Client programs
       are expected to format these lines according to the protocol, as no checking will be performed before transmission.

       At the end of a connection, you must call upsclient_disconnect(3) to disconnect from upsd and release any dynamic memory associated with
       the UPSCONN_t structure. Failure to call this function will result in memory and file descriptor leaks in your program.

ERROR HANDLING

       In the event of an error, upscli_strerror(3) will provide human-readable details on what happened. upscli_upserror(3) may also be used to
       retrieve the error number. These numbers are defined in upsclient.h as UPSCLI_ERR_*.

SEE ALSO

       libupsclient-config(1), upscli_connect(3), upscli_disconnect(3), upscli_fd(3), upscli_getvar(3), upscli_list_next(3), upscli_list_start(3),
       upscli_readline(3), upscli_sendline(3), upscli_splitaddr(3), upscli_splitname(3), upscli_ssl(3), upscli_strerror(3), upscli_upserror(3)

Network UPS Tools						    05/22/2012							      UPSCLIENT(3)