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author | Andrei Mozzhuhin <nopscmn@gmail.com> | 2013-05-16 11:24:09 +0200 |
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committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2013-05-16 11:40:42 +0200 |
commit | 7bb71c7e9dd7a95953a8507cb49f4949a01ae2e4 (patch) | |
tree | 7adefcb855933c47a5ff00d73c67542d81c293c5 /cpukit/libmisc/shell/main_df.c | |
parent | dosfs: Add statvfs() support (diff) | |
download | rtems-7bb71c7e9dd7a95953a8507cb49f4949a01ae2e4.tar.bz2 |
shell: Add df command
Diffstat (limited to 'cpukit/libmisc/shell/main_df.c')
-rw-r--r-- | cpukit/libmisc/shell/main_df.c | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/cpukit/libmisc/shell/main_df.c b/cpukit/libmisc/shell/main_df.c new file mode 100644 index 0000000000..41183bd107 --- /dev/null +++ b/cpukit/libmisc/shell/main_df.c @@ -0,0 +1,158 @@ +/** + * df Shell Command Implmentation + * + * @brief Obtain MS-DOS filesystem information + * @ingroup libfs_msdos MSDOS FileSystem + */ + +/* + * 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.com/license/LICENSE. + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <rtems/shell.h> + +#define __need_getopt_newlib +#include <getopt.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 %10llu %9llu %11llu %9llu%% %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 %9llu%% %14s\n", + mt_entry->dev == NULL ? "none" : mt_entry->dev, f_buf, u_buf, a_buf, + (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 */ +}; |