460b9539 |
1 | /* |
2 | * This file is part of DisOrder |
3 | * Copyright (C) 2005 Richard Kettlewell |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License as published by |
7 | * the Free Software Foundation; either version 2 of the License, or |
8 | * (at your option) any later version. |
9 | * |
10 | * This program is distributed in the hope that it will be useful, but |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | * General Public License for more details. |
14 | * |
15 | * You should have received a copy of the GNU General Public License |
16 | * along with this program; if not, write to the Free Software |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
18 | * USA |
19 | */ |
20 | |
21 | #include <config.h> |
22 | #include "types.h" |
23 | |
24 | #include <unistd.h> |
25 | #include <string.h> |
26 | #include <errno.h> |
27 | |
28 | #include "syscalls.h" |
29 | #include "logfd.h" |
30 | #include "event.h" |
31 | #include "log.h" |
32 | |
33 | struct logfd_state { |
34 | const char *tag; |
35 | }; |
36 | |
37 | /* called when bytes are available and at eof */ |
38 | static int logfd_readable(ev_source attribute((unused)) *ev, |
39 | ev_reader *reader, |
40 | int fd, |
41 | void *ptr, |
42 | size_t bytes, |
43 | int eof, |
44 | void *u) { |
45 | char *nl; |
46 | const char *tag = u; |
47 | int len; |
48 | |
49 | while((nl = memchr(ptr, '\n', bytes))) { |
50 | len = nl - (char *)ptr; |
51 | ev_reader_consume(reader, len + 1); |
52 | info("%s: %.*s", tag, len, (char *)ptr); |
53 | ptr = nl + 1; |
54 | bytes -= len + 1; |
55 | } |
56 | if(eof && bytes) { |
57 | info("%s: %.*s", tag, (int)bytes, (char *)ptr); |
58 | ev_reader_consume(reader, bytes); |
59 | } |
60 | if(eof) |
61 | xclose(fd); |
62 | return 0; |
63 | } |
64 | |
65 | /* called when a read error occurs */ |
66 | static int logfd_error(ev_source attribute((unused)) *ev, |
67 | int fd, |
68 | int errno_value, |
69 | void *u) { |
70 | const char *tag = u; |
71 | |
72 | error(errno_value, "error reading log pipe from %s", tag); |
73 | xclose(fd); |
74 | return 0; |
75 | } |
76 | |
77 | int logfd(ev_source *ev, const char *tag) { |
78 | int p[2]; |
79 | |
80 | xpipe(p); |
81 | cloexec(p[0]); |
82 | nonblock(p[0]); |
83 | if(!ev_reader_new(ev, p[0], logfd_readable, logfd_error, (void *)tag)) |
84 | fatal(errno, "error calling ev_reader_new"); |
85 | return p[1]; |
86 | } |
87 | |
88 | /* |
89 | Local Variables: |
90 | c-basic-offset:2 |
91 | comment-column:40 |
92 | fill-column:79 |
93 | indent-tabs-mode:nil |
94 | End: |
95 | */ |