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Sketch out the actual on-wire format in daemon-client.h documentation, and add

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a simplified send interface.
This commit is contained in:
Petr Rockai 2011-06-27 12:26:54 +00:00
parent 140615dafb
commit 5c1706e3ef
1 changed files with 24 additions and 1 deletions
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25
daemons/common/daemon-client.h
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@ -20,7 +20,6 @@
typedef struct {
int socket_fd; /* the fd we use to talk to the daemon */
int protocol; /* version of the protocol the daemon uses */
char *read_buf;
} daemon_handle;
typedef struct {
@ -31,6 +30,17 @@ typedef struct {
typedef struct {
char *buffer;
/*
* The request looks like this:
* request = "id"
* arg_foo = "something"
* arg_bar = 3
* arg_wibble {
* something_special = "here"
* amount = 75
* knobs = [ "twiddle", "tweak" ]
* }
*/
struct config_node *cft;
} daemon_request;
@ -53,9 +63,22 @@ daemon_handle daemon_open(daemon_info i);
* Send a request to the daemon, waiting for the reply. All communication with
* the daemon is synchronous. The function handles the IO details and parses the
* response, handling common error conditions. See "daemon_reply" for details.
*
* In case the request contains a non-NULL buffer pointer, this buffer is sent
* *verbatim* to the server. In this case, the cft pointer may be NULL (but will
* be ignored even if non-NULL). If the buffer is NULL, the cft is required to
* be a valid pointer, and is used to build up the request.
*/
daemon_reply daemon_send(daemon_handle h, daemon_request r);
/*
* A simple interface to daemon_send. This function just takes the command id
* and possibly a list of parameters (of the form "name = %?", "value"). The
* type (string, integer) of the value is indicated by a character substituted
* for ? in %?: d for integer, s for string.
*/
daemon_reply daemon_send_simple(daemon_handle h, char *id, ...);
/* Shut down the communication to the daemon. Compulsory. */
void daemon_close(daemon_handle h);