fix error log message
[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 = 999 * 1000;
86         max = -1;
87         ret = r->pre_select(&rn, &rfds, &wfds, &timeout);
88         max = PARA_MAX(max, ret);
89
90         PARA_DEBUG_LOG("timeout: %lums, max: %d\n", tv2ms(&timeout), max);
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 }