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/**
* df Shell Command Implmentation
*
* @ingroup libfs_msdos MSDOS FileSystem
*
* @brief Obtain MS-DOS filesystem information
*/
/*
* Copyright (c) 2013 Andrey Mozzhuhin
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/shell.h>
#define __need_getopt_newlib
#include <getopt.h>
#include <string.h>
#include <inttypes.h>
static const char suffixes[] =
{ 'B', 'K', 'M', 'G', 'T' };
struct df_context
{
unsigned block_size;
};
static unsigned rtems_shell_df_parse_size(const char *str)
{
unsigned result;
char suffix;
int i;
if (sscanf(str, "%d%c", &result, &suffix) == 2)
{
for (i = 0; i < sizeof(suffixes) / sizeof(suffixes[0]); i++)
{
if (suffix == suffixes[i])
break;
result *= 1024;
}
}
else if (sscanf(str, "%d", &result) != 1)
{
result = 0;
}
return result;
}
static char *rtems_shell_df_humanize_size(unsigned block_size, char *buf,
size_t size)
{
int i = 0;
while (block_size >= 1024 && i < sizeof(suffixes) / sizeof(suffixes[0]) - 1)
{
block_size /= 1024;
i++;
}
snprintf(buf, size, "%d%c", block_size, suffixes[i]);
return buf;
}
static bool rtems_shell_df_print_entry(
const rtems_filesystem_mount_table_entry_t *mt_entry, void *arg)
{
struct df_context *context = arg;
struct statvfs svfs;
int code;
char f_buf[16], u_buf[16], a_buf[16];
if ((code = statvfs(mt_entry->target, &svfs)))
return false;
if (context->block_size > 0)
{
printf(
"%-15s %10" PRIu64 " %9" PRIu64 " %11" PRIu64 " %9" PRIu64 "%% %14s\n",
mt_entry->dev == NULL ? "none" : mt_entry->dev,
(svfs.f_blocks * svfs.f_frsize + (context->block_size - 1)) / context->block_size,
((svfs.f_blocks - svfs.f_bfree) * svfs.f_frsize + (context->block_size - 1)) / context->block_size,
(svfs.f_bfree * svfs.f_frsize + (context->block_size - 1)) / context->block_size,
((svfs.f_blocks - svfs.f_bfree) * 100 / svfs.f_blocks),
mt_entry->target == NULL ? "none" : mt_entry->target);
}
else
{
rtems_shell_df_humanize_size(svfs.f_blocks * svfs.f_frsize, f_buf,
sizeof(f_buf));
rtems_shell_df_humanize_size((svfs.f_blocks - svfs.f_bfree) * svfs.f_frsize,
u_buf, sizeof(u_buf));
rtems_shell_df_humanize_size(svfs.f_bfree * svfs.f_frsize, a_buf,
sizeof(a_buf));
printf("%-15s %10s %9s %11s %9" PRIu64 "%% %14s\n",
mt_entry->dev == NULL ? "none" : mt_entry->dev, f_buf, u_buf, a_buf,
(uint64_t)(svfs.f_blocks - svfs.f_bfree) * 100 / svfs.f_blocks,
mt_entry->target == NULL ? "none" : mt_entry->target);
}
return false;
}
static int rtems_shell_main_df(int argc, char **argv)
{
int c;
struct getopt_data optdata;
struct df_context context;
char buf[32];
memset(&optdata, 0, sizeof(optdata));
context.block_size = 1024;
while ((c = getopt_r(argc, (char**) argv, ":hB:", &optdata)) != -1)
{
switch (c)
{
case 'h':
context.block_size = 0;
break;
case 'B':
context.block_size = rtems_shell_df_parse_size(optdata.optarg);
break;
default:
return -1;
}
}
if (context.block_size == 0)
printf(
"Filesystem Size Used Available Use%% Mounted on\n");
else
printf(
"Filesystem %s-blocks Used Available Use%% Mounted on\n",
rtems_shell_df_humanize_size(context.block_size, buf, sizeof(buf)));
rtems_filesystem_mount_iterate(rtems_shell_df_print_entry, &context);
return 0;
}
rtems_shell_cmd_t rtems_shell_DF_Command =
{
"df", /* name */
"[-hB]\n"
" -h human-readable output\n"
" -B scale sizes by SIZE before printing them\n", /* usage */
"files", /* topic */
rtems_shell_main_df, /* command */
NULL, /* alias */
NULL /* next */
};
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