file_write.c: make file_write_parse_config() static and change arg to const char*
[paraslash.git] / file_write.c
1 /*
2 * Copyright (C) 2006-2007 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
19 /** \file file_write.c simple output plugin for testing purposes */
20
21 #include "para.h"
22 #include "list.h"
23 #include "sched.h"
24 #include "write.h"
25 #include "string.h"
26 #include "fd.h"
27 #include "file_write.cmdline.h"
28 #include "error.h"
29
30 /** data specific to the file writer */
31 struct private_file_write_data {
32 /** the file descriptor of the output file */
33 int fd;
34 /** non-zero if \a fd was added to the write fd set */
35 int check_fd;
36 };
37
38 static int file_write_open(struct writer_node *wn)
39 {
40 struct private_file_write_data *pfwd = para_calloc(
41 sizeof(struct private_file_write_data));
42 struct file_write_args_info *conf = wn->conf;
43 char *filename;
44 if (conf->filename_given)
45 filename = conf->filename_arg;
46 else {
47 char *tmp = para_tmpname(), *home = para_homedir();
48 filename = make_message("%s/.paraslash/%s", home, tmp);
49 free(home);
50 free(tmp);
51 }
52 wn->private_data = pfwd;
53 pfwd->fd = open(filename, O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR);
54 if (!conf->filename_given)
55 free(filename);
56 if (pfwd->fd >= 0)
57 return 8192;
58 free(pfwd);
59 return -E_FW_OPEN;
60 }
61
62 static int file_write_pre_select(struct sched *s, struct writer_node *wn)
63 {
64 struct private_file_write_data *pfwd = wn->private_data;
65 struct writer_node_group *wng = wn->wng;
66
67 pfwd->check_fd = 0;
68 if (pfwd->fd <= 0)
69 return -E_FW_NO_FILE;
70 if (!*wng->loaded)
71 return 1;
72 para_fd_set(pfwd->fd, &s->wfds, &s->max_fileno);
73 pfwd->check_fd = 1;
74 return 1;
75 }
76
77 static int file_write_post_select(struct sched *s, struct writer_node *wn)
78 {
79 struct private_file_write_data *pfwd = wn->private_data;
80 struct writer_node_group *wng = wn->wng;
81 int ret;
82
83 if (!pfwd->check_fd)
84 return 1;
85 if (*wng->loaded <= wn->written)
86 return 1;
87 if (!FD_ISSET(pfwd->fd, &s->wfds))
88 return 1;
89 // PARA_INFO_LOG("writing %zd\n", *wng->loaded);
90 ret = write(pfwd->fd, wng->buf + wn->written,
91 *wng->loaded - wn->written);
92 if (ret < 0)
93 return -E_FW_WRITE;
94 wn->written += ret;
95 return 1;
96 }
97
98 static void file_write_close(struct writer_node *wn)
99 {
100 struct private_file_write_data *pfwd = wn->private_data;
101 close(pfwd->fd);
102 free(pfwd);
103 }
104
105 __malloc static void *file_write_parse_config(const char *options)
106 {
107 PARA_INFO_LOG("options: %s\n", options);
108 struct file_write_args_info *conf
109 = para_calloc(sizeof(struct file_write_args_info));
110 int ret = file_cmdline_parser_string(options, conf, "file_write");
111 PARA_INFO_LOG("conf->filename_given: %d\n", conf->filename_given);
112 if (!ret)
113 return conf;
114 free(conf);
115 return NULL;
116 }
117
118 /** the init function of the file writer */
119 void file_write_init(struct writer *w)
120 {
121 w->open = file_write_open;
122 w->pre_select = file_write_pre_select;
123 w->post_select = file_write_post_select;
124 w->parse_config = file_write_parse_config;
125 w->close = file_write_close;
126 w->shutdown = NULL; /* nothing to do */
127 }