X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=coreutils%2Fdf.c;h=846cb38addb33730b856393c6ce0da3d73db0d96;hb=66426760beef7e87c4735f433d123daf911b5b4a;hp=c387204547aef77204a2cadb0e5a26bfcf35a782;hpb=61677feff7f549a48267c2c0c50a7420de6e2599;p=oweals%2Fbusybox.git diff --git a/coreutils/df.c b/coreutils/df.c index c38720454..846cb38ad 100644 --- a/coreutils/df.c +++ b/coreutils/df.c @@ -2,117 +2,254 @@ /* * Mini df implementation for busybox * - * Copyright (C) 1999,2000 by Lineo, inc. - * Written by Erik Andersen , + * Copyright (C) 1999-2004 by Erik Andersen * based on original code by (I think) Bruce Perens . * - * 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. + * Licensed under GPLv2 or later, see file LICENSE in this source tree. + */ + +/* BB_AUDIT SUSv3 _NOT_ compliant -- option -t missing. */ +/* http://www.opengroup.org/onlinepubs/007904975/utilities/df.html */ + +/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org) * - * 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. + * Size reduction. Removed floating point dependency. Added error checking + * on output. Output stats on 0-sized filesystems if specifically listed on + * the command line. Properly round *-blocks, Used, and Available quantities. * - * 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 02111-1307 USA + * Aug 28, 2008 Bernhard Reutner-Fischer * + * Implement -P and -B; better coreutils compat; cleanup */ -#include "internal.h" -#include +//usage:#define df_trivial_usage +//usage: "[-Pk" +//usage: IF_FEATURE_HUMAN_READABLE("mh") +//usage: IF_FEATURE_DF_FANCY("ai] [-B SIZE") +//usage: "] [FILESYSTEM]..." +//usage:#define df_full_usage "\n\n" +//usage: "Print filesystem usage statistics\n" +//usage: "\n -P POSIX output format" +//usage: "\n -k 1024-byte blocks (default)" +//usage: IF_FEATURE_HUMAN_READABLE( +//usage: "\n -m 1M-byte blocks" +//usage: "\n -h Human readable (e.g. 1K 243M 2G)" +//usage: ) +//usage: IF_FEATURE_DF_FANCY( +//usage: "\n -a Show all filesystems" +//usage: "\n -i Inodes" +//usage: "\n -B SIZE Blocksize" +//usage: ) +//usage: +//usage:#define df_example_usage +//usage: "$ df\n" +//usage: "Filesystem 1K-blocks Used Available Use% Mounted on\n" +//usage: "/dev/sda3 8690864 8553540 137324 98% /\n" +//usage: "/dev/sda1 64216 36364 27852 57% /boot\n" +//usage: "$ df /dev/sda3\n" +//usage: "Filesystem 1K-blocks Used Available Use% Mounted on\n" +//usage: "/dev/sda3 8690864 8553540 137324 98% /\n" +//usage: "$ POSIXLY_CORRECT=sure df /dev/sda3\n" +//usage: "Filesystem 512B-blocks Used Available Use% Mounted on\n" +//usage: "/dev/sda3 17381728 17107080 274648 98% /\n" +//usage: "$ POSIXLY_CORRECT=yep df -P /dev/sda3\n" +//usage: "Filesystem 512-blocks Used Available Capacity Mounted on\n" +//usage: "/dev/sda3 17381728 17107080 274648 98% /\n" + #include -#include #include +#include "libbb.h" +#include "unicode.h" -static const char df_usage[] = "df [filesystem ...]\n\n" - "Print the filesystem space used and space available.\n"; - -extern const char mtab_file[]; /* Defined in utility.c */ +#if !ENABLE_FEATURE_HUMAN_READABLE +static unsigned long kscale(unsigned long b, unsigned long bs) +{ + return (b * (unsigned long long) bs + 1024/2) / 1024; +} +#endif -static int df(char *device, const char *mountPoint) +int df_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +int df_main(int argc UNUSED_PARAM, char **argv) { + unsigned long blocks_used; + unsigned blocks_percent_used; + unsigned long df_disp_hr = 1024; + int status = EXIT_SUCCESS; + unsigned opt; + FILE *mount_table; + struct mntent *mount_entry; struct statfs s; - long blocks_used; - long blocks_percent_used; - if (statfs(mountPoint, &s) != 0) { - perror(mountPoint); - return FALSE; - } + enum { + OPT_KILO = (1 << 0), + OPT_POSIX = (1 << 1), + OPT_ALL = (1 << 2) * ENABLE_FEATURE_DF_FANCY, + OPT_INODE = (1 << 3) * ENABLE_FEATURE_DF_FANCY, + OPT_BSIZE = (1 << 4) * ENABLE_FEATURE_DF_FANCY, + OPT_HUMAN = (1 << (2 + 3*ENABLE_FEATURE_DF_FANCY)) * ENABLE_FEATURE_HUMAN_READABLE, + OPT_MEGA = (1 << (3 + 3*ENABLE_FEATURE_DF_FANCY)) * ENABLE_FEATURE_HUMAN_READABLE, + }; + const char *disp_units_hdr = NULL; + char *chp; - if (s.f_blocks > 0) { - blocks_used = s.f_blocks - s.f_bfree; - blocks_percent_used = (long) - (blocks_used * 100.0 / (blocks_used + s.f_bavail) + 0.5); - /* Note that if /etc/fstab is missing, libc can't fix up /dev/root for us */ - if (strcmp(device, "/dev/root") == 0) { - /* Adjusts device to be the real root device, - * or leaves device alone if it can't find it */ - find_real_root_device_name( device); - } - printf("%-20s %9ld %9ld %9ld %3ld%% %s\n", - device, - (long) (s.f_blocks * (s.f_bsize / 1024.0)), - (long) ((s.f_blocks - s.f_bfree) * (s.f_bsize / 1024.0)), - (long) (s.f_bavail * (s.f_bsize / 1024.0)), - blocks_percent_used, mountPoint); + init_unicode(); +#if ENABLE_FEATURE_HUMAN_READABLE && ENABLE_FEATURE_DF_FANCY + opt_complementary = "k-mB:m-Bk:B-km"; +#elif ENABLE_FEATURE_HUMAN_READABLE + opt_complementary = "k-m:m-k"; +#endif + opt = getopt32(argv, "kP" + IF_FEATURE_DF_FANCY("aiB:") + IF_FEATURE_HUMAN_READABLE("hm") + IF_FEATURE_DF_FANCY(, &chp)); + if (opt & OPT_MEGA) + df_disp_hr = 1024*1024; + + if (opt & OPT_BSIZE) + df_disp_hr = xatoul_range(chp, 1, ULONG_MAX); /* disallow 0 */ + + /* From the manpage of df from coreutils-6.10: + Disk space is shown in 1K blocks by default, unless the environment + variable POSIXLY_CORRECT is set, in which case 512-byte blocks are used. + */ + if (getenv("POSIXLY_CORRECT")) /* TODO - a new libbb function? */ + df_disp_hr = 512; + + if (opt & OPT_HUMAN) { + df_disp_hr = 0; + disp_units_hdr = " Size"; } + if (opt & OPT_INODE) + disp_units_hdr = " Inodes"; - return TRUE; -} + if (disp_units_hdr == NULL) { +#if ENABLE_FEATURE_HUMAN_READABLE + disp_units_hdr = xasprintf("%s-blocks", + /* print df_disp_hr, show no fractionals, + * use suffixes if OPT_POSIX is set in opt */ + make_human_readable_str(df_disp_hr, 0, !!(opt & OPT_POSIX)) + ); +#else + disp_units_hdr = xasprintf("%lu-blocks", df_disp_hr); +#endif + } + printf("Filesystem %-15sUsed Available %s Mounted on\n", + disp_units_hdr, (opt & OPT_POSIX) ? "Capacity" : "Use%"); -extern int df_main(int argc, char **argv) -{ - printf("%-20s %-14s %s %s %s %s\n", "Filesystem", - "1k-blocks", "Used", "Available", "Use%", "Mounted on"); + mount_table = NULL; + argv += optind; + if (!argv[0]) { + mount_table = setmntent(bb_path_mtab_file, "r"); + if (!mount_table) + bb_perror_msg_and_die(bb_path_mtab_file); + } - if (argc > 1) { - struct mntent *mountEntry; - int status; + while (1) { + const char *device; + const char *mount_point; - if (**(argv + 1) == '-') { - usage(df_usage); - } - while (argc > 1) { - if ((mountEntry = findMountPoint(argv[1], mtab_file)) == 0) { - fprintf(stderr, "%s: can't find mount point.\n", argv[1]); - exit(FALSE); + if (mount_table) { + mount_entry = getmntent(mount_table); + if (!mount_entry) { + endmntent(mount_table); + break; + } + } else { + mount_point = *argv++; + if (!mount_point) + break; + mount_entry = find_mount_point(mount_point, 1); + if (!mount_entry) { + bb_error_msg("%s: can't find mount point", mount_point); + set_error: + status = EXIT_FAILURE; + continue; } - status = df(mountEntry->mnt_fsname, mountEntry->mnt_dir); - if (status != 0) - exit(status); - argc--; - argv++; } - exit(TRUE); - } else { - FILE *mountTable; - struct mntent *mountEntry; - - mountTable = setmntent(mtab_file, "r"); - if (mountTable == 0) { - perror(mtab_file); - exit(FALSE); + + device = mount_entry->mnt_fsname; + mount_point = mount_entry->mnt_dir; + + if (statfs(mount_point, &s) != 0) { + bb_simple_perror_msg(mount_point); + goto set_error; } - while ((mountEntry = getmntent(mountTable))) { - df(mountEntry->mnt_fsname, mountEntry->mnt_dir); + if ((s.f_blocks > 0) || !mount_table || (opt & OPT_ALL)) { + if (opt & OPT_INODE) { + s.f_blocks = s.f_files; + s.f_bavail = s.f_bfree = s.f_ffree; + s.f_bsize = 1; + + if (df_disp_hr) + df_disp_hr = 1; + } + blocks_used = s.f_blocks - s.f_bfree; + blocks_percent_used = 0; + if (blocks_used + s.f_bavail) { + blocks_percent_used = (blocks_used * 100ULL + + (blocks_used + s.f_bavail)/2 + ) / (blocks_used + s.f_bavail); + } + + /* GNU coreutils 6.10 skips certain mounts, try to be compatible. */ + if (ENABLE_FEATURE_SKIP_ROOTFS && strcmp(device, "rootfs") == 0) + continue; + +#ifdef WHY_WE_DO_IT_FOR_DEV_ROOT_ONLY + if (strcmp(device, "/dev/root") == 0) { + /* Adjusts device to be the real root device, + * or leaves device alone if it can't find it */ + device = find_block_device("/"); + if (!device) { + goto set_error; + } + } +#endif + +#if ENABLE_UNICODE_SUPPORT + { + uni_stat_t uni_stat; + char *uni_dev = unicode_conv_to_printable(&uni_stat, device); + if (uni_stat.unicode_width > 20) { + printf("%s\n%20s", uni_dev, ""); + } else { + printf("%s%*s", uni_dev, 20 - (int)uni_stat.unicode_width, ""); + } + free(uni_dev); + } +#else + if (printf("\n%-20s" + 1, device) > 20) + printf("\n%-20s", ""); +#endif + +#if ENABLE_FEATURE_HUMAN_READABLE + printf(" %9s ", + /* f_blocks x f_bsize / df_disp_hr, show one fractional, + * use suffixes if df_disp_hr == 0 */ + make_human_readable_str(s.f_blocks, s.f_bsize, df_disp_hr)); + + printf(" %9s " + 1, + /* EXPR x f_bsize / df_disp_hr, show one fractional, + * use suffixes if df_disp_hr == 0 */ + make_human_readable_str((s.f_blocks - s.f_bfree), + s.f_bsize, df_disp_hr)); + + printf("%9s %3u%% %s\n", + /* f_bavail x f_bsize / df_disp_hr, show one fractional, + * use suffixes if df_disp_hr == 0 */ + make_human_readable_str(s.f_bavail, s.f_bsize, df_disp_hr), + blocks_percent_used, mount_point); +#else + printf(" %9lu %9lu %9lu %3u%% %s\n", + kscale(s.f_blocks, s.f_bsize), + kscale(s.f_blocks - s.f_bfree, s.f_bsize), + kscale(s.f_bavail, s.f_bsize), + blocks_percent_used, mount_point); +#endif } - endmntent(mountTable); } - exit(TRUE); + return status; } - -/* -Local Variables: -c-file-style: "linux" -c-basic-offset: 4 -tab-width: 4 -End: -*/