2 * Copyright (C) 2006-2009 Andre Noll <maan@systemlinux.org>
4 * Licensed under the GPL v2. For licencing details see COPYING.
7 /** \file file_write.c simple output plugin for testing purposes */
10 #include <sys/types.h>
19 #include "buffer_tree.h"
21 #include "write_common.h"
24 #include "file_write.cmdline.h"
27 /** Data specific to the file writer. */
28 struct private_file_write_data
{
29 /** The file descriptor of the output file. */
34 * Get a random filename.
36 * This is by no means a secure way to create temporary files in a hostile
37 * directory like \p /tmp. However, we use it only for creating temp files in
38 * ~/.paraslash, for which it is OK. Result must be freed by the caller.
40 __must_check __malloc
static char *random_filename(void)
42 char *result
, *home
= para_homedir();
45 gettimeofday(&tv
, NULL
);
47 result
= make_message("%s/.paraslash/%08lu", home
,
48 para_random(99999999));
53 static int file_write_open(struct writer_node
*wn
)
55 struct private_file_write_data
*pfwd
= para_calloc(
56 sizeof(struct private_file_write_data
));
57 struct file_write_args_info
*conf
= wn
->conf
;
60 if (conf
->filename_given
)
61 filename
= conf
->filename_arg
;
63 filename
= random_filename();
64 wn
->private_data
= pfwd
;
65 pfwd
->fd
= open(filename
, O_WRONLY
| O_CREAT
, S_IRUSR
| S_IWUSR
);
66 if (!conf
->filename_given
)
74 static void file_write_pre_select(struct sched
*s
, struct task
*t
)
76 struct writer_node
*wn
= container_of(t
, struct writer_node
, task
);
77 struct private_file_write_data
*pfwd
= wn
->private_data
;
81 ret
= btr_node_status(wn
->btrn
, wn
->min_iqs
, BTR_NT_LEAF
);
83 para_fd_set(pfwd
->fd
, &s
->wfds
, &s
->max_fileno
);
88 static void file_write_close(struct writer_node
*wn
)
90 struct private_file_write_data
*pfwd
= wn
->private_data
;
96 static void file_write_post_select(__a_unused
struct sched
*s
,
99 struct writer_node
*wn
= container_of(t
, struct writer_node
, task
);
100 struct private_file_write_data
*pfwd
= wn
->private_data
;
101 struct btr_node
*btrn
= wn
->btrn
;
107 ret
= btr_node_status(btrn
, wn
->min_iqs
, BTR_NT_LEAF
);
110 if (!FD_ISSET(pfwd
->fd
, &s
->wfds
))
112 bytes
= btr_next_buffer(btrn
, &buf
);
114 //PARA_INFO_LOG("writing %zu\n", bytes);
115 ret
= write(pfwd
->fd
, buf
, bytes
);
118 btr_consume(btrn
, ret
);
121 btr_remove_node(btrn
);
125 __malloc
static void *file_write_parse_config(const char *options
)
127 struct file_write_args_info
*conf
128 = para_calloc(sizeof(struct file_write_args_info
));
129 int ret
= file_cmdline_parser_string(options
, conf
, "file_write");
131 PARA_INFO_LOG("conf->filename_given: %d\n", conf
->filename_given
);
138 static void file_write_free_config(void *conf
)
140 file_cmdline_parser_free(conf
);
143 /** the init function of the file writer */
144 void file_write_init(struct writer
*w
)
146 struct file_write_args_info dummy
;
148 file_cmdline_parser_init(&dummy
);
149 w
->open
= file_write_open
;
150 w
->pre_select
= file_write_pre_select
;
151 w
->post_select
= file_write_post_select
;
152 w
->parse_config
= file_write_parse_config
;
153 w
->free_config
= file_write_free_config
;
154 w
->close
= file_write_close
;
155 w
->shutdown
= NULL
; /* nothing to do */
156 w
->help
= (struct ggo_help
) {
157 .short_help
= file_write_args_info_help
,
158 .detailed_help
= file_write_args_info_detailed_help
160 file_cmdline_parser_free(&dummy
);