1 /*
2 * SysDB - src/tools/sysdb/command.c
3 * Copyright (C) 2014 Sebastian 'tokkee' Harl <sh@tokkee.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
17 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
19 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
28 #if HAVE_CONFIG_H
29 # include "config.h"
30 #endif /* HAVE_CONFIG_H */
32 #include "tools/sysdb/command.h"
33 #include "tools/sysdb/input.h"
35 #include "frontend/proto.h"
36 #include "utils/error.h"
37 #include "utils/strbuf.h"
39 #include <errno.h>
41 #include <assert.h>
42 #include <ctype.h>
43 #include <stdlib.h>
44 #include <string.h>
46 /*
47 * public API
48 */
50 int
51 sdb_command_print_reply(sdb_client_t *client)
52 {
53 sdb_strbuf_t *recv_buf;
54 const char *result;
55 uint32_t rcode = 0;
56 int status = 0;
58 recv_buf = sdb_strbuf_create(1024);
59 if (! recv_buf)
60 return -1;
62 if (sdb_client_recv(client, &rcode, recv_buf) < 0)
63 rcode = UINT32_MAX;
65 if (sdb_client_eof(client)) {
66 sdb_strbuf_destroy(recv_buf);
67 return -1;
68 }
70 if (rcode == UINT32_MAX) {
71 printf("ERROR: ");
72 status = -1;
73 }
74 else
75 status = (int)rcode;
77 result = sdb_strbuf_string(recv_buf);
78 /* At the moment, we don't care about the result type. We simply print the
79 * result without further parsing it. */
80 if (status == CONNECTION_DATA)
81 result += sizeof(uint32_t);
82 if (result && *result)
83 printf("%s\n", result);
84 else if (rcode == UINT32_MAX) {
85 char errbuf[1024];
86 printf("%s\n", sdb_strerror(errno, errbuf, sizeof(errbuf)));
87 }
89 sdb_strbuf_destroy(recv_buf);
90 return status;
91 } /* sdb_command_print_reply */
93 char *
94 sdb_command_exec(sdb_input_t *input)
95 {
96 const char *query;
97 uint32_t query_len;
99 char *data = NULL;
101 query = sdb_strbuf_string(input->input);
102 query_len = (uint32_t)input->query_len;
104 assert(input->query_len <= input->tokenizer_pos);
106 /* removing leading and trailing newlines */
107 while (query_len && (*query == '\n')) {
108 ++query;
109 --query_len;
110 }
111 while (query_len && (query[query_len - 1]) == '\n')
112 --query_len;
114 if (query_len) {
115 data = strndup(query, query_len);
116 /* ignore errors; we'll only hide the command from the caller */
118 sdb_client_send(input->client, CONNECTION_QUERY, query_len, query);
120 /* The server will send back *something*, either error/log messages
121 * and/or the reply to the query. Here, we don't care about what it
122 * sends back. We'll wait for the first reply and then return to the
123 * main loop which will handle any subsequent replies, including
124 * eventually the reply to the query (if it's not the first reply). */
125 if (sdb_command_print_reply(input->client) < 0) {
126 if (data)
127 free(data);
128 return NULL;
129 }
130 }
132 sdb_strbuf_skip(input->input, 0, input->query_len);
133 input->tokenizer_pos -= input->query_len;
134 input->query_len = 0;
135 return data;
136 } /* sdb_command_exec */
138 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */