2 * Copyright (C) 2006-2010 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 void file_write_open(__a_unused struct writer_node *wn)
57 static int prepare_output_file(struct writer_node *wn)
59 struct file_write_args_info *conf = wn->conf;
62 struct private_file_write_data *pfwd = para_calloc(sizeof(*pfwd));
64 if (conf->filename_given)
65 filename = conf->filename_arg;
67 filename = random_filename();
68 ret = para_open(filename, O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR);
69 if (!conf->filename_given)
74 ret = mark_fd_blocking(pfwd->fd);
77 wn->private_data = pfwd;
86 static void file_write_pre_select(struct sched *s, struct task *t)
88 struct writer_node *wn = container_of(t, struct writer_node, task);
89 struct private_file_write_data *pfwd = wn->private_data;
90 int ret = btr_node_status(wn->btrn, wn->min_iqs, BTR_NT_LEAF);
95 return sched_min_delay(s);
96 para_fd_set(pfwd->fd, &s->wfds, &s->max_fileno);
99 static void file_write_close(struct writer_node *wn)
101 struct private_file_write_data *pfwd = wn->private_data;
109 static void file_write_post_select(__a_unused struct sched *s,
112 struct writer_node *wn = container_of(t, struct writer_node, task);
113 struct private_file_write_data *pfwd = wn->private_data;
114 struct btr_node *btrn = wn->btrn;
120 ret = btr_node_status(btrn, wn->min_iqs, BTR_NT_LEAF);
124 ret = prepare_output_file(wn);
127 if (!FD_ISSET(pfwd->fd, &s->wfds))
129 bytes = btr_next_buffer(btrn, &buf);
131 //PARA_INFO_LOG("writing %zu\n", bytes);
132 ret = write(pfwd->fd, buf, bytes);
135 btr_consume(btrn, ret);
138 btr_remove_node(btrn);
142 __malloc static void *file_write_parse_config_or_die(const char *options)
144 struct file_write_args_info *conf = para_calloc(sizeof(*conf));
146 /* exits on errors */
147 file_cmdline_parser_string(options, conf, "file_write");
151 static void file_write_free_config(void *conf)
153 file_cmdline_parser_free(conf);
156 /** the init function of the file writer */
157 void file_write_init(struct writer *w)
159 struct file_write_args_info dummy;
161 file_cmdline_parser_init(&dummy);
162 w->open = file_write_open;
163 w->pre_select = file_write_pre_select;
164 w->post_select = file_write_post_select;
165 w->parse_config_or_die = file_write_parse_config_or_die;
166 w->free_config = file_write_free_config;
167 w->close = file_write_close;
168 w->shutdown = NULL; /* nothing to do */
169 w->help = (struct ggo_help) {
170 .short_help = file_write_args_info_help,
171 .detailed_help = file_write_args_info_detailed_help
173 file_cmdline_parser_free(&dummy);