Documentation updates for 0.4.
[paraslash.git] / file_write.c
index 2021526..1c534ae 100644 (file)
@@ -1,26 +1,19 @@
 /*
- * Copyright (C) 2006-2007 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2006-2009 Andre Noll <maan@systemlinux.org>
  *
- *     This program is free software; you can redistribute it and/or modify
- *     it under the terms of the GNU General Public License as published by
- *     the Free Software Foundation; either version 2 of the License, or
- *     (at your option) any later version.
- *
- *     This program is distributed in the hope that it will be useful,
- *     but WITHOUT ANY WARRANTY; without even the implied warranty of
- *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *     GNU General Public License for more details.
- *
- *     You should have received a copy of the GNU General Public License
- *     along with this program; if not, write to the Free Software
- *     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
+ * Licensed under the GPL v2. For licencing details see COPYING.
  */
 
 /** \file file_write.c simple output plugin for testing purposes */
 
+#include <sys/types.h>
+#include <dirent.h>
+#include <sys/time.h>
+
 #include "para.h"
 #include "list.h"
 #include "sched.h"
+#include "ggo.h"
 #include "write.h"
 #include "string.h"
 #include "fd.h"
@@ -35,26 +28,43 @@ struct private_file_write_data {
        int check_fd;
 };
 
+/*
+ * 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)
+{
+       char *result, *home = para_homedir();
+       struct timeval tv;
+
+       gettimeofday(&tv, NULL);
+       srandom(tv.tv_usec);
+       result = make_message("%s/.paraslash/%08lu", home,
+               para_random(99999999));
+       free(home);
+       return result;
+}
+
 static int file_write_open(struct writer_node *wn)
 {
        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);
-       }
+       else
+               filename = random_filename();
        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;
+               return 1;
        free(pfwd);
        return -E_FW_OPEN;
 }
@@ -87,7 +97,7 @@ static int file_write_post_select(struct sched *s, struct writer_node *wn)
        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,
+       ret = write(pfwd->fd, *wng->bufp + wn->written,
                *wng->loaded - wn->written);
        if (ret < 0)
                return -E_FW_WRITE;
@@ -104,10 +114,10 @@ static void file_write_close(struct writer_node *wn)
 
 __malloc static void *file_write_parse_config(const char *options)
 {
-       PARA_INFO_LOG("options: %s\n", options);
        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;
@@ -118,10 +128,17 @@ __malloc static void *file_write_parse_config(const char *options)
 /** the init function of the file writer */
 void file_write_init(struct writer *w)
 {
+       struct file_write_args_info dummy;
+
+       file_cmdline_parser_init(&dummy);
        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 */
+       w->help = (struct ggo_help) {
+               .short_help = file_write_args_info_help,
+               .detailed_help = file_write_args_info_detailed_help
+       };
 }