-/*
- * Copyright (C) 2006-2008 Andre Noll <maan@systemlinux.org>
- *
- * Licensed under the GPL v2. For licencing details see COPYING.
- */
+/* Copyright (C) 2006 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
/** \file file_write.c simple output plugin for testing purposes */
+#include <regex.h>
#include <sys/types.h>
-#include <dirent.h>
+#include <lopsub.h>
+#include "write_cmd.lsg.h"
#include "para.h"
#include "list.h"
#include "sched.h"
+#include "buffer_tree.h"
#include "write.h"
#include "string.h"
#include "fd.h"
-#include "file_write.cmdline.h"
#include "error.h"
-/** data specific to the file writer */
+/** Data specific to the file writer. */
struct private_file_write_data {
- /** the file descriptor of the output file */
+ /** The file descriptor of the output file. */
int fd;
- /** non-zero if \a fd was added to the write fd set */
- int check_fd;
};
-static int file_write_open(struct writer_node *wn)
+/*
+ * Get a random filename.
+ *
+ * This is by no means a secure way to create temporary files in a hostile
+ * directory like \p /tmp. However, we use it only for creating temp files in
+ * ~/.paraslash, for which it is OK. Result must be freed by the caller.
+ */
+__must_check __malloc static char *random_filename(void)
{
- struct private_file_write_data *pfwd = para_calloc(
- sizeof(struct private_file_write_data));
- struct file_write_args_info *conf = wn->conf;
- char *filename;
- if (conf->filename_given)
- filename = conf->filename_arg;
- else {
- char *tmp = para_tmpname(), *home = para_homedir();
- filename = make_message("%s/.paraslash/%s", home, tmp);
- free(home);
- free(tmp);
- }
- wn->private_data = pfwd;
- pfwd->fd = open(filename, O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR);
- if (!conf->filename_given)
- free(filename);
- if (pfwd->fd >= 0)
- return 8192;
- free(pfwd);
- return -E_FW_OPEN;
+ char *result, *home = para_homedir();
+
+ srandom(clock_get_realtime(NULL)->tv_usec);
+ result = make_message("%s/.paraslash/%08ld", home,
+ para_random(99999999));
+ free(home);
+ return result;
}
-static int file_write_pre_select(struct sched *s, struct writer_node *wn)
+static int prepare_output_file(struct writer_node *wn)
{
- struct private_file_write_data *pfwd = wn->private_data;
- struct writer_node_group *wng = wn->wng;
+ const unsigned flags = O_WRONLY | O_CREAT, mode = S_IRUSR | S_IWUSR;
+ int ret, fd;
+ struct private_file_write_data *pfwd;
- pfwd->check_fd = 0;
- if (pfwd->fd <= 0)
- return -E_FW_NO_FILE;
- if (!*wng->loaded)
- return 1;
- para_fd_set(pfwd->fd, &s->wfds, &s->max_fileno);
- pfwd->check_fd = 1;
+
+ if (WRITE_CMD_OPT_GIVEN(FILE, FILENAME, wn->lpr)) {
+ const char *path = WRITE_CMD_OPT_STRING_VAL(FILE, FILENAME,
+ wn->lpr);
+ ret = para_open(path, flags, mode);
+ } else {
+ char *path = random_filename();
+ ret = para_open(path, flags, mode);
+ free(path);
+ }
+ if (ret < 0)
+ return ret;
+ fd = ret;
+ ret = mark_fd_blocking(fd);
+ if (ret < 0) {
+ close(fd);
+ return ret;
+ }
+ pfwd = wn->private_data = para_calloc(sizeof(*pfwd));
+ pfwd->fd = fd;
return 1;
}
-static int file_write_post_select(struct sched *s, struct writer_node *wn)
+static void file_write_pre_select(struct sched *s, void *context)
{
+ struct writer_node *wn = context;
struct private_file_write_data *pfwd = wn->private_data;
- struct writer_node_group *wng = wn->wng;
- int ret;
+ int ret = btr_node_status(wn->btrn, wn->min_iqs, BTR_NT_LEAF);
- if (!pfwd->check_fd)
- return 1;
- if (*wng->loaded <= wn->written)
- return 1;
- if (!FD_ISSET(pfwd->fd, &s->wfds))
- return 1;
-// PARA_INFO_LOG("writing %zd\n", *wng->loaded);
- ret = write(pfwd->fd, wng->buf + wn->written,
- *wng->loaded - wn->written);
- if (ret < 0)
- return -E_FW_WRITE;
- wn->written += ret;
- return 1;
+ if (ret == 0)
+ return;
+ if (ret < 0 || !pfwd)
+ return sched_min_delay(s);
+ para_fd_set(pfwd->fd, &s->wfds, &s->max_fileno);
}
static void file_write_close(struct writer_node *wn)
{
struct private_file_write_data *pfwd = wn->private_data;
+
+ if (!pfwd)
+ return;
close(pfwd->fd);
free(pfwd);
}
-__malloc static void *file_write_parse_config(const char *options)
+static int file_write_post_select(__a_unused struct sched *s, void *context)
{
- struct file_write_args_info *conf
- = para_calloc(sizeof(struct file_write_args_info));
- int ret = file_cmdline_parser_string(options, conf, "file_write");
-
- PARA_INFO_LOG("conf->filename_given: %d\n", conf->filename_given);
- if (!ret)
- return conf;
- free(conf);
- return NULL;
+ struct writer_node *wn = context;
+ struct private_file_write_data *pfwd = wn->private_data;
+ struct btr_node *btrn = wn->btrn;
+ int ret;
+ char *buf;
+ size_t bytes;
+
+ ret = task_get_notification(wn->task);
+ if (ret < 0)
+ goto out;
+ ret = btr_node_status(btrn, wn->min_iqs, BTR_NT_LEAF);
+ if (ret <= 0)
+ goto out;
+ if (!pfwd) {
+ ret = prepare_output_file(wn);
+ goto out;
+ }
+ if (!FD_ISSET(pfwd->fd, &s->wfds))
+ return 0;
+ bytes = btr_next_buffer(btrn, &buf);
+ assert(bytes > 0);
+ //PARA_INFO_LOG("writing %zu\n", bytes);
+ ret = xwrite(pfwd->fd, buf, bytes);
+ if (ret < 0)
+ goto out;
+ btr_consume(btrn, ret);
+out:
+ if (ret < 0)
+ btr_remove_node(&wn->btrn);
+ return ret;
}
/** the init function of the file writer */
-void file_write_init(struct writer *w)
-{
- w->open = file_write_open;
- w->pre_select = file_write_pre_select;
- w->post_select = file_write_post_select;
- w->parse_config = file_write_parse_config;
- w->close = file_write_close;
- w->shutdown = NULL; /* nothing to do */
-}
+struct writer lsg_write_cmd_com_file_user_data = {
+ .pre_select = file_write_pre_select,
+ .post_select = file_write_post_select,
+ .close = file_write_close,
+};