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_btr(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);
85 s->timeout.tv_sec = 0;
86 s->timeout.tv_usec = 1;
90 static void file_write_close(struct writer_node *wn)
92 struct private_file_write_data *pfwd = wn->private_data;
98 static void file_write_post_select_btr(__a_unused struct sched *s,
101 struct writer_node *wn = container_of(t, struct writer_node, task);
102 struct private_file_write_data *pfwd = wn->private_data;
103 struct btr_node *btrn = wn->btrn;
109 ret = btr_node_status(btrn, wn->min_iqs, BTR_NT_LEAF);
112 if (!FD_ISSET(pfwd->fd, &s->wfds))
114 bytes = btr_next_buffer(btrn, &buf);
116 //PARA_INFO_LOG("writing %zu\n", bytes);
117 ret = write(pfwd->fd, buf, bytes);
120 btr_consume(btrn, ret);
123 btr_remove_node(btrn);
127 __malloc static void *file_write_parse_config(const char *options)
129 struct file_write_args_info *conf
130 = para_calloc(sizeof(struct file_write_args_info));
131 int ret = file_cmdline_parser_string(options, conf, "file_write");
133 PARA_INFO_LOG("conf->filename_given: %d\n", conf->filename_given);
140 static void file_write_free_config(void *conf)
142 file_cmdline_parser_free(conf);
145 /** the init function of the file writer */
146 void file_write_init(struct writer *w)
148 struct file_write_args_info dummy;
150 file_cmdline_parser_init(&dummy);
151 w->open = file_write_open;
152 w->pre_select_btr = file_write_pre_select_btr;
153 w->post_select_btr = file_write_post_select_btr;
154 w->parse_config = file_write_parse_config;
155 w->free_config = file_write_free_config;
156 w->close = file_write_close;
157 w->shutdown = NULL; /* nothing to do */
158 w->help = (struct ggo_help) {
159 .short_help = file_write_args_info_help,
160 .detailed_help = file_write_args_info_detailed_help
162 file_cmdline_parser_free(&dummy);