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 */
31 /** non-zero if \a fd was added to the write fd set */
36 * Get a random filename.
38 * This is by no means a secure way to create temporary files in a hostile
39 * directory like \p /tmp. However, we use it only for creating temp files in
40 * ~/.paraslash, for which it is OK. Result must be freed by the caller.
42 __must_check __malloc static char *random_filename(void)
44 char *result, *home = para_homedir();
47 gettimeofday(&tv, NULL);
49 result = make_message("%s/.paraslash/%08lu", home,
50 para_random(99999999));
55 static int file_write_open(struct writer_node *wn)
57 struct private_file_write_data *pfwd = para_calloc(
58 sizeof(struct private_file_write_data));
59 struct file_write_args_info *conf = wn->conf;
62 if (conf->filename_given)
63 filename = conf->filename_arg;
65 filename = random_filename();
66 wn->private_data = pfwd;
67 pfwd->fd = open(filename, O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR);
68 if (!conf->filename_given)
76 static int file_write_pre_select(struct sched *s, struct writer_node *wn)
78 struct private_file_write_data *pfwd = wn->private_data;
79 struct writer_node_group *wng = wn->wng;
86 para_fd_set(pfwd->fd, &s->wfds, &s->max_fileno);
91 static void file_write_pre_select_btr(struct sched *s, struct task *t)
93 struct writer_node *wn = container_of(t, struct writer_node, task);
94 struct private_file_write_data *pfwd = wn->private_data;
99 ret = btr_node_status(wn->btrn, wn->min_iqs, BTR_NT_LEAF);
101 para_fd_set(pfwd->fd, &s->wfds, &s->max_fileno);
103 } else if (ret < 0) {
104 s->timeout.tv_sec = 0;
105 s->timeout.tv_usec = 1;
109 static int file_write_post_select(struct sched *s, struct writer_node *wn)
111 struct private_file_write_data *pfwd = wn->private_data;
112 struct writer_node_group *wng = wn->wng;
117 if (*wng->loaded <= wn->written)
119 if (!FD_ISSET(pfwd->fd, &s->wfds))
121 // PARA_INFO_LOG("writing %zd\n", *wng->loaded);
122 ret = write(pfwd->fd, *wng->bufp + wn->written,
123 *wng->loaded - wn->written);
130 static void file_write_close(struct writer_node *wn)
132 struct private_file_write_data *pfwd = wn->private_data;
135 file_cmdline_parser_free(wn->conf);
139 static void file_write_post_select_btr(__a_unused struct sched *s,
142 struct writer_node *wn = container_of(t, struct writer_node, task);
143 struct private_file_write_data *pfwd = wn->private_data;
144 struct btr_node *btrn = wn->btrn;
150 ret = btr_node_status(btrn, wn->min_iqs, BTR_NT_LEAF);
157 if (!FD_ISSET(pfwd->fd, &s->wfds))
159 bytes = btr_next_buffer(btrn, &buf);
161 //PARA_INFO_LOG("writing %zu\n", bytes);
162 ret = write(pfwd->fd, buf, bytes);
165 btr_consume(btrn, ret);
172 __malloc static void *file_write_parse_config(const char *options)
174 struct file_write_args_info *conf
175 = para_calloc(sizeof(struct file_write_args_info));
176 int ret = file_cmdline_parser_string(options, conf, "file_write");
178 PARA_INFO_LOG("conf->filename_given: %d\n", conf->filename_given);
185 static void file_write_free_config(void *conf)
187 file_cmdline_parser_free(conf);
190 /** the init function of the file writer */
191 void file_write_init(struct writer *w)
193 struct file_write_args_info dummy;
195 file_cmdline_parser_init(&dummy);
196 w->open = file_write_open;
197 w->pre_select = file_write_pre_select;
198 w->pre_select_btr = file_write_pre_select_btr;
199 w->post_select = file_write_post_select;
200 w->post_select_btr = file_write_post_select_btr;
201 w->parse_config = file_write_parse_config;
202 w->free_config = file_write_free_config;
203 w->close = file_write_close;
204 w->shutdown = NULL; /* nothing to do */
205 w->help = (struct ggo_help) {
206 .short_help = file_write_args_info_help,
207 .detailed_help = file_write_args_info_detailed_help
209 file_cmdline_parser_free(&dummy);