introduce para_select()
[paraslash.git] / recv.c
1 /*
2 * Copyright (C) 2005-2006 Andre Noll <maan@systemlinux.org>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
17 */
18 #include "para.h"
19
20 #include "recv.h"
21 #include "recv.cmdline.h"
22 #include "fd.h"
23 #include "error.h"
24
25 struct gengetopt_args_info conf;
26
27 INIT_RECV_ERRLISTS;
28
29 __printf_2_3 void para_log(int ll, const char* fmt,...)
30 {
31 va_list argp;
32
33 /* ignore log message if loglevel is not high enough */
34 if (ll < conf.loglevel_arg)
35 return;
36 va_start(argp, fmt);
37 vfprintf(stderr, fmt, argp);
38 va_end(argp);
39 }
40
41 static void *parse_config(int argc, char *argv[], int *receiver_num)
42 {
43 int i;
44
45 if (cmdline_parser(argc, argv, &conf))
46 return NULL;
47 if (conf.list_receivers_given) {
48 printf("available receivers: ");
49 for (i = 0; receivers[i].name; i++)
50 printf("%s%s", i? " " : "", receivers[i].name);
51 printf("\nTry\n\tpara_recv -r '<receivername> -h'\n"
52 "for help on <receivername>.\n");
53 exit(EXIT_SUCCESS);
54 }
55 return check_receiver_arg(conf.receiver_arg, receiver_num);
56 }
57
58 int main(int argc, char *argv[])
59 {
60 int ret, eof = 0, max, r_opened = 0, receiver_num;
61 struct timeval timeout;
62 struct receiver *r = NULL;
63 fd_set rfds, wfds;
64 struct receiver_node rn;
65
66 memset(&rn, 0, sizeof(struct receiver_node));
67 for (ret = 0; receivers[ret].name; ret++)
68 receivers[ret].init(&receivers[ret]);
69 ret = -E_RECV_SYNTAX;
70 rn.conf = parse_config(argc, argv, &receiver_num);
71 if (!rn.conf) {
72 PARA_EMERG_LOG("%s", "parse failed\n");
73 goto out;
74 }
75 r = &receivers[receiver_num];
76 rn.receiver = r;
77 ret = r->open(&rn);
78 if (ret < 0)
79 goto out;
80 r_opened = 1;
81 recv:
82 FD_ZERO(&rfds);
83 FD_ZERO(&wfds);
84 timeout.tv_sec = 0;
85 timeout.tv_usec = 1000 * 1000;
86 max = -1;
87 ret = r->pre_select(&rn, &rfds, &wfds, &timeout);
88 max = MAX(max, ret);
89
90 PARA_DEBUG_LOG("timeout: %lums\n", tv2ms(&timeout));
91 ret = para_select(max + 1, &rfds, &wfds, &timeout);
92 if (ret < 0) {
93 ret = -E_RECV_SELECT;
94 goto out;
95 }
96 ret = r->post_select(&rn, ret, &rfds, &wfds);
97 if (ret < 0)
98 goto out;
99 if (!ret)
100 eof = 1;
101 if (!rn.loaded) {
102 if (eof)
103 goto out;
104 goto recv;
105 }
106 ret = write(STDOUT_FILENO, rn.buf, rn.loaded);
107 PARA_DEBUG_LOG("wrote %d/%zd\n", ret, rn.loaded);
108 if (ret < 0) {
109 ret = -E_WRITE_STDOUT;
110 goto out;
111 }
112 if (ret != rn.loaded) {
113 PARA_INFO_LOG("short write %d/%zd\n", ret, rn.loaded);
114 memmove(rn.buf, rn.buf + ret, rn.loaded - ret);
115 }
116 rn.loaded -= ret;
117 if (rn.loaded || !eof)
118 goto recv;
119 out:
120 if (r_opened)
121 r->close(&rn);
122 if (r)
123 r->shutdown();
124 if (ret < 0)
125 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
126 return ret;
127 }