2 * Copyright (C) 2006-2011 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 prepare_output_file(struct writer_node *wn)
55 struct file_write_args_info *conf = wn->conf;
58 struct private_file_write_data *pfwd = para_calloc(sizeof(*pfwd));
60 if (conf->filename_given)
61 filename = conf->filename_arg;
63 filename = random_filename();
64 ret = para_open(filename, O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR);
65 if (!conf->filename_given)
70 ret = mark_fd_blocking(pfwd->fd);
73 wn->private_data = pfwd;
82 static void file_write_pre_select(struct sched *s, struct task *t)
84 struct writer_node *wn = container_of(t, struct writer_node, task);
85 struct private_file_write_data *pfwd = wn->private_data;
86 int ret = btr_node_status(wn->btrn, wn->min_iqs, BTR_NT_LEAF);
91 return sched_min_delay(s);
92 para_fd_set(pfwd->fd, &s->wfds, &s->max_fileno);
95 static void file_write_close(struct writer_node *wn)
97 struct private_file_write_data *pfwd = wn->private_data;
105 static void file_write_post_select(__a_unused struct sched *s,
108 struct writer_node *wn = container_of(t, struct writer_node, task);
109 struct private_file_write_data *pfwd = wn->private_data;
110 struct btr_node *btrn = wn->btrn;
116 ret = btr_node_status(btrn, wn->min_iqs, BTR_NT_LEAF);
120 ret = prepare_output_file(wn);
123 if (!FD_ISSET(pfwd->fd, &s->wfds))
125 bytes = btr_next_buffer(btrn, &buf);
127 //PARA_INFO_LOG("writing %zu\n", bytes);
128 ret = write(pfwd->fd, buf, bytes);
131 btr_consume(btrn, ret);
134 btr_remove_node(btrn);
138 __malloc static void *file_write_parse_config_or_die(const char *options)
140 struct file_write_args_info *conf = para_calloc(sizeof(*conf));
142 /* exits on errors */
143 file_cmdline_parser_string(options, conf, "file_write");
147 static void file_write_free_config(void *conf)
149 file_cmdline_parser_free(conf);
152 /** the init function of the file writer */
153 void file_write_init(struct writer *w)
155 struct file_write_args_info dummy;
157 file_cmdline_parser_init(&dummy);
158 w->pre_select = file_write_pre_select;
159 w->post_select = file_write_post_select;
160 w->parse_config_or_die = file_write_parse_config_or_die;
161 w->free_config = file_write_free_config;
162 w->close = file_write_close;
163 w->shutdown = NULL; /* nothing to do */
164 w->help = (struct ggo_help) {
165 .short_help = file_write_args_info_help,
166 .detailed_help = file_write_args_info_detailed_help
168 file_cmdline_parser_free(&dummy);