Fix a bug in the output of para_audioc.
[paraslash.git] / file_write.c
1 /*
2 * Copyright (C) 2006-2009 Andre Noll <maan@systemlinux.org>
3 *
4 * Licensed under the GPL v2. For licencing details see COPYING.
5 */
6
7 /** \file file_write.c simple output plugin for testing purposes */
8
9 #include <sys/types.h>
10 #include <dirent.h>
11 #include <sys/time.h>
12
13 #include "para.h"
14 #include "list.h"
15 #include "sched.h"
16 #include "ggo.h"
17 #include "write.h"
18 #include "string.h"
19 #include "fd.h"
20 #include "file_write.cmdline.h"
21 #include "error.h"
22
23 /** data specific to the file writer */
24 struct private_file_write_data {
25 /** the file descriptor of the output file */
26 int fd;
27 /** non-zero if \a fd was added to the write fd set */
28 int check_fd;
29 };
30
31 /*
32 * Get a random filename.
33 *
34 * This is by no means a secure way to create temporary files in a hostile
35 * directory like \p /tmp. However, we use it only for creating temp files in
36 * ~/.paraslash, for which it is OK. Result must be freed by the caller.
37 */
38 __must_check __malloc static char *random_filename(void)
39 {
40 char *result, *home = para_homedir();
41 struct timeval tv;
42
43 gettimeofday(&tv, NULL);
44 srandom(tv.tv_usec);
45 result = make_message("%s/.paraslash/%08lu", home,
46 para_random(99999999));
47 free(home);
48 return result;
49 }
50
51 static int file_write_open(struct writer_node *wn)
52 {
53 struct private_file_write_data *pfwd = para_calloc(
54 sizeof(struct private_file_write_data));
55 struct file_write_args_info *conf = wn->conf;
56 char *filename;
57
58 if (conf->filename_given)
59 filename = conf->filename_arg;
60 else
61 filename = random_filename();
62 wn->private_data = pfwd;
63 pfwd->fd = open(filename, O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR);
64 if (!conf->filename_given)
65 free(filename);
66 if (pfwd->fd >= 0)
67 return 1;
68 free(pfwd);
69 return -E_FW_OPEN;
70 }
71
72 static int file_write_pre_select(struct sched *s, struct writer_node *wn)
73 {
74 struct private_file_write_data *pfwd = wn->private_data;
75 struct writer_node_group *wng = wn->wng;
76
77 pfwd->check_fd = 0;
78 if (pfwd->fd <= 0)
79 return -E_FW_NO_FILE;
80 if (!*wng->loaded)
81 return 1;
82 para_fd_set(pfwd->fd, &s->wfds, &s->max_fileno);
83 pfwd->check_fd = 1;
84 return 1;
85 }
86
87 static int file_write_post_select(struct sched *s, struct writer_node *wn)
88 {
89 struct private_file_write_data *pfwd = wn->private_data;
90 struct writer_node_group *wng = wn->wng;
91 int ret;
92
93 if (!pfwd->check_fd)
94 return 1;
95 if (*wng->loaded <= wn->written)
96 return 1;
97 if (!FD_ISSET(pfwd->fd, &s->wfds))
98 return 1;
99 // PARA_INFO_LOG("writing %zd\n", *wng->loaded);
100 ret = write(pfwd->fd, *wng->bufp + wn->written,
101 *wng->loaded - wn->written);
102 if (ret < 0)
103 return -E_FW_WRITE;
104 wn->written += ret;
105 return 1;
106 }
107
108 static void file_write_close(struct writer_node *wn)
109 {
110 struct private_file_write_data *pfwd = wn->private_data;
111 close(pfwd->fd);
112 free(pfwd);
113 }
114
115 __malloc static void *file_write_parse_config(const char *options)
116 {
117 struct file_write_args_info *conf
118 = para_calloc(sizeof(struct file_write_args_info));
119 int ret = file_cmdline_parser_string(options, conf, "file_write");
120
121 PARA_INFO_LOG("conf->filename_given: %d\n", conf->filename_given);
122 if (!ret)
123 return conf;
124 free(conf);
125 return NULL;
126 }
127
128 /** the init function of the file writer */
129 void file_write_init(struct writer *w)
130 {
131 struct file_write_args_info dummy;
132
133 file_cmdline_parser_init(&dummy);
134 w->open = file_write_open;
135 w->pre_select = file_write_pre_select;
136 w->post_select = file_write_post_select;
137 w->parse_config = file_write_parse_config;
138 w->close = file_write_close;
139 w->shutdown = NULL; /* nothing to do */
140 w->help = (struct ggo_help) {
141 .short_help = file_write_args_info_help,
142 .detailed_help = file_write_args_info_detailed_help
143 };
144 }