X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=coreutils%2Fdf.c;h=bd487ee9528bd9b71f63c21468d0bd7aaf7ece01;hb=e135a5d746c4f163f191e12b527636b0345e1456;hp=8cc93814bd46f0b21edd47fbc6160816ca426d3f;hpb=596e5469d00fa4a74d8a3b1ebfaae20ce8dc3afe;p=oweals%2Fbusybox.git diff --git a/coreutils/df.c b/coreutils/df.c index 8cc93814b..bd487ee95 100644 --- a/coreutils/df.c +++ b/coreutils/df.c @@ -1,136 +1,170 @@ -#include "internal.h" +/* vi: set sw=4 ts=4: */ +/* + * Mini df implementation for busybox + * + * 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. + * + * 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 02111-1307 USA + * + */ + +/* BB_AUDIT SUSv3 _NOT_ compliant -- options -P and -t missing. Also blocksize. */ +/* http://www.opengroup.org/onlinepubs/007904975/utilities/df.html */ + +/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org) + * + * 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. + */ + #include +#include +#include +#include #include -#include #include -#include - -const char df_usage[] = "df [filesystem ...]\n" -"\n" -"\tPrint the filesystem space used and space available.\n"; - +#include "busybox.h" -static int -df(char* device, const char * mountPoint) +#ifndef CONFIG_FEATURE_HUMAN_READABLE +static long kscale(long b, long bs) { - struct statfs s; - long blocks_used; - long blocks_percent_used; + return ( b * (long long) bs + KILOBYTE/2 ) / KILOBYTE; +} +#endif - if ( statfs(mountPoint, &s) != 0 ) { - perror(mountPoint); - return 1; +int df_main(int argc, char **argv) +{ + long blocks_used; + long blocks_percent_used; +#ifdef CONFIG_FEATURE_HUMAN_READABLE + unsigned long df_disp_hr = KILOBYTE; +#endif + int status = EXIT_SUCCESS; + unsigned long opt; + FILE *mount_table; + struct mntent *mount_entry; + struct statfs s; + static const char hdr_1k[] = "1k-blocks"; /* default display is kilobytes */ + const char *disp_units_hdr = hdr_1k; + +#ifdef CONFIG_FEATURE_HUMAN_READABLE + bb_opt_complementally = "h-km:k-hm:m-hk"; + opt = bb_getopt_ulflags(argc, argv, "hmk"); + if(opt & 1) { + df_disp_hr = 0; + disp_units_hdr = " Size"; } - - 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); - if ( strcmp(device, "/dev/root")==0) - device=(getfsfile ("/"))->fs_spec; - - 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); - + if(opt & 2) { + df_disp_hr = MEGABYTE; + disp_units_hdr = "1M-blocks"; + } +#else + opt = bb_getopt_ulflags(argc, argv, "k"); +#endif + + bb_printf("Filesystem%11s%-15sUsed Available Use%% Mounted on\n", + "", disp_units_hdr); + + mount_table = NULL; + argv += optind; + if (optind >= argc) { + if (!(mount_table = setmntent(bb_path_mtab_file, "r"))) { + bb_perror_msg_and_die(bb_path_mtab_file); + } } - return 0; -} + do { + const char *device; + const char *mount_point; -extern int -df_main(int argc, char * * argv) -{ - printf("%-20s %-14s %s %s %s %s\n", "Filesystem", - "1k-blocks", "Used", "Available", "Use%", "Mounted on"); - - if ( argc > 1 ) { - struct mntent* mountEntry; - int status; - - while ( argc > 1 ) { - if ( (mountEntry = findMountPoint(argv[1], "/proc/mounts")) == 0 ) - { - fprintf(stderr, "%s: can't find mount point.\n" ,argv[1]); - return 1; + if (mount_table) { + if (!(mount_entry = getmntent(mount_table))) { + endmntent(mount_table); + break; + } + } else { + if (!(mount_point = *argv++)) { + break; + } + if (!(mount_entry = find_mount_point(mount_point, bb_path_mtab_file))) { + 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 ) - return status; - argc--; - argv++; - } - return 0; - } - else { - FILE * mountTable; - struct mntent * mountEntry; - - mountTable = setmntent("/proc/mounts", "r"); - if ( mountTable == 0) { - perror("/proc/mounts"); - exit( FALSE); } - while ( (mountEntry = getmntent (mountTable))) { - int status=df(mountEntry->mnt_fsname, mountEntry->mnt_dir); - if (status) - return status; + device = mount_entry->mnt_fsname; + mount_point = mount_entry->mnt_dir; + + if (statfs(mount_point, &s) != 0) { + bb_perror_msg("%s", mount_point); + goto SET_ERROR; } - endmntent(mountTable); - } - - return 0; -} + if ((s.f_blocks > 0) || !mount_table){ + blocks_used = s.f_blocks - s.f_bfree; + blocks_percent_used = 0; + if (blocks_used + s.f_bavail) { + blocks_percent_used = (((long long) blocks_used) * 100 + + (blocks_used + s.f_bavail)/2 + ) / (blocks_used + s.f_bavail); + } + if (strcmp(device, "rootfs") == 0) { + continue; + } else if (strcmp(device, "/dev/root") == 0) { + /* Adjusts device to be the real root device, + * or leaves device alone if it can't find it */ + if ((device = find_block_device("/")) == NULL) { + goto SET_ERROR; + } + } +#ifdef CONFIG_FEATURE_HUMAN_READABLE + bb_printf("%-20s %9s ", device, + make_human_readable_str(s.f_blocks, s.f_bsize, df_disp_hr)); + + bb_printf("%9s ", + make_human_readable_str( (s.f_blocks - s.f_bfree), + s.f_bsize, df_disp_hr)); + + bb_printf("%9s %3ld%% %s\n", + make_human_readable_str(s.f_bavail, s.f_bsize, df_disp_hr), + blocks_percent_used, mount_point); +#else + bb_printf("%-20s %9ld %9ld %9ld %3ld%% %s\n", + device, + 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 + } -/* - * Given a block device, find the mount table entry if that block device - * is mounted. - * - * Given any other file (or directory), find the mount table entry for its - * filesystem. - */ -extern struct mntent * -findMountPoint(const char* name, const char* table) -{ - struct stat s; - dev_t mountDevice; - FILE * mountTable; - struct mntent * mountEntry; - - if ( stat(name, &s) != 0 ) - return 0; - - if ( (s.st_mode & S_IFMT) == S_IFBLK ) - mountDevice = s.st_rdev; - else - mountDevice = s.st_dev; - - - if ( (mountTable = setmntent(table, "r")) == 0 ) - return 0; - - while ( (mountEntry = getmntent(mountTable)) != 0 ) { - if ( strcmp(name, mountEntry->mnt_dir) == 0 - || strcmp(name, mountEntry->mnt_fsname) == 0 ) /* String match. */ - break; - if ( stat(mountEntry->mnt_fsname, &s) == 0 - && s.st_rdev == mountDevice ) /* Match the device. */ - break; - if ( stat(mountEntry->mnt_dir, &s) == 0 - && s.st_dev == mountDevice ) /* Match the directory's mount point. */ - break; - } - endmntent(mountTable); - return mountEntry; -} + } while (1); + bb_fflush_stdout_and_exit(status); +} +/* +Local Variables: +c-file-style: "linux" +c-basic-offset: 4 +tab-width: 4 +End: +*/