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 int file_write_open(struct writer_node *wn)
55 struct private_file_write_data *pfwd = para_calloc(sizeof(*pfwd));
57 wn->private_data = pfwd;
62 static int prepare_output_file(struct writer_node *wn)
64 struct file_write_args_info *conf = wn->conf;
65 struct private_file_write_data *pfwd = wn->private_data;
69 if (conf->filename_given)
70 filename = conf->filename_arg;
72 filename = random_filename();
73 ret = para_open(filename, O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR);
74 if (!conf->filename_given)
79 ret = mark_fd_blocking(pfwd->fd);
88 static void file_write_pre_select(struct sched *s, struct task *t)
90 struct writer_node *wn = container_of(t, struct writer_node, task);
91 struct private_file_write_data *pfwd = wn->private_data;
95 ret = btr_node_status(wn->btrn, wn->min_iqs, BTR_NT_LEAF);
96 if (ret > 0 && pfwd->fd >= 0)
97 para_fd_set(pfwd->fd, &s->wfds, &s->max_fileno);
98 else if (ret != 0) /* error or bos and fd not yet open */
102 static void file_write_close(struct writer_node *wn)
104 struct private_file_write_data *pfwd = wn->private_data;
111 static void file_write_post_select(__a_unused struct sched *s,
114 struct writer_node *wn = container_of(t, struct writer_node, task);
115 struct private_file_write_data *pfwd = wn->private_data;
116 struct btr_node *btrn = wn->btrn;
122 ret = btr_node_status(btrn, wn->min_iqs, BTR_NT_LEAF);
126 ret = prepare_output_file(wn);
130 if (!FD_ISSET(pfwd->fd, &s->wfds))
132 bytes = btr_next_buffer(btrn, &buf);
134 //PARA_INFO_LOG("writing %zu\n", bytes);
135 ret = write(pfwd->fd, buf, bytes);
138 btr_consume(btrn, ret);
141 btr_remove_node(btrn);
145 __malloc static void *file_write_parse_config_or_die(const char *options)
147 struct file_write_args_info *conf = para_calloc(sizeof(*conf));
149 /* exits on errors */
150 file_cmdline_parser_string(options, conf, "file_write");
154 static void file_write_free_config(void *conf)
156 file_cmdline_parser_free(conf);
159 /** the init function of the file writer */
160 void file_write_init(struct writer *w)
162 struct file_write_args_info dummy;
164 file_cmdline_parser_init(&dummy);
165 w->open = file_write_open;
166 w->pre_select = file_write_pre_select;
167 w->post_select = file_write_post_select;
168 w->parse_config_or_die = file_write_parse_config_or_die;
169 w->free_config = file_write_free_config;
170 w->close = file_write_close;
171 w->shutdown = NULL; /* nothing to do */
172 w->help = (struct ggo_help) {
173 .short_help = file_write_args_info_help,
174 .detailed_help = file_write_args_info_detailed_help
176 file_cmdline_parser_free(&dummy);