3 * Perform a Moira query
5 * Copyright (C) 1987-1998 by the Massachusetts Institute of Technology
6 * For copying and distribution information, please see the file
11 #include <mit-copyright.h>
13 #include "mr_private.h"
20 int mr_query_internal(int argc, char **argv,
21 int (*callback)(int, char **, void *), void *callarg);
24 * This routine is the primary external interface to the mr library.
26 * It builds a new argument vector with the query handle prepended,
27 * and calls mr_query_internal.
31 int mr_query(char *name, int argc, char **argv,
32 int (*callproc)(int, char **, void *), void *callarg)
34 char **nargv = malloc(sizeof(char *) * (argc + 1));
38 memcpy(nargv + 1, argv, sizeof(char *) * argc);
39 status = mr_query_internal(argc + 1, nargv, callproc, callarg);
45 * This routine makes a Moira query.
47 * argv[0] is the query name.
48 * argv[1..argc-1] are the query arguments.
50 * callproc is called once for each returned value, with arguments
51 * argc, argv, and callarg.
52 * If it returns a non-zero value, further calls to it are not done, and
53 * all future data from the server is ignored (there should be some
54 * way to send it a quench..)
57 int mr_query_internal(int argc, char **argv,
58 int (*callproc)(int, char **, void *), void *callarg)
62 mr_params *params = NULL;
63 mr_params *reply = NULL;
64 int stopcallbacks = 0;
67 return MR_QUERY_NOT_REENTRANT;
73 params->mr_version_no = sending_version_no;
74 params->mr_procno = MR_QUERY;
75 params->mr_argc = argc;
76 params->mr_argl = NULL;
77 params->mr_argv = argv;
79 if ((status = mr_do_call(params, &reply)))
82 while ((status = reply->mr_status) == MR_MORE_DATA)
84 if (!stopcallbacks && callproc)
85 stopcallbacks = (*callproc)(reply->mr_argc, reply->mr_argv, callarg);
86 mr_destroy_reply(reply);
89 initialize_operation(_mr_recv_op, mr_start_recv, &reply, NULL);
90 queue_operation(_mr_conn, CON_INPUT, _mr_recv_op);
92 complete_operation(_mr_recv_op);
93 if (OP_STATUS(_mr_recv_op) != OP_COMPLETE)
101 mr_destroy_reply(reply);