| /* vi: set sw=4 ts=4: */ |
| /* |
| * Mini df implementation for busybox |
| * |
| * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> |
| * based on original code by (I think) Bruce Perens <bruce@pixar.com>. |
| * |
| * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
| */ |
| |
| /* 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 <mntent.h> |
| #include <sys/vfs.h> |
| #include "libbb.h" |
| |
| #ifndef CONFIG_FEATURE_HUMAN_READABLE |
| static long kscale(long b, long bs) |
| { |
| return ( b * (long long) bs + 1024/2 ) / 1024; |
| } |
| #endif |
| |
| int df_main(int argc, char **argv); |
| int df_main(int argc, char **argv) |
| { |
| long blocks_used; |
| long blocks_percent_used; |
| #ifdef CONFIG_FEATURE_HUMAN_READABLE |
| unsigned long df_disp_hr = 1024; |
| #endif |
| int status = EXIT_SUCCESS; |
| unsigned 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 |
| opt_complementary = "h-km:k-hm:m-hk"; |
| opt = getopt32(argc, argv, "hmk"); |
| if (opt & 1) { |
| df_disp_hr = 0; |
| disp_units_hdr = " Size"; |
| } |
| if (opt & 2) { |
| df_disp_hr = 1024*1024; |
| disp_units_hdr = "1M-blocks"; |
| } |
| #else |
| opt = getopt32(argc, argv, "k"); |
| #endif |
| |
| printf("Filesystem%11s%-15sUsed Available Use%% Mounted on\n", |
| "", disp_units_hdr); |
| |
| mount_table = NULL; |
| argv += optind; |
| if (optind >= argc) { |
| mount_table = setmntent(bb_path_mtab_file, "r"); |
| if (!mount_table) { |
| bb_perror_msg_and_die(bb_path_mtab_file); |
| } |
| } |
| |
| do { |
| const char *device; |
| const char *mount_point; |
| |
| 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, bb_path_mtab_file); |
| if (!mount_entry) { |
| bb_error_msg("%s: can't find mount point", mount_point); |
| SET_ERROR: |
| status = EXIT_FAILURE; |
| continue; |
| } |
| } |
| |
| 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; |
| } |
| |
| 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 */ |
| device = find_block_device("/"); |
| if (!device) { |
| goto SET_ERROR; |
| } |
| } |
| |
| #ifdef CONFIG_FEATURE_HUMAN_READABLE |
| printf("%-20s %9s ", device, |
| make_human_readable_str(s.f_blocks, s.f_bsize, df_disp_hr)); |
| |
| printf("%9s ", |
| make_human_readable_str( (s.f_blocks - s.f_bfree), |
| s.f_bsize, df_disp_hr)); |
| |
| printf("%9s %3ld%% %s\n", |
| make_human_readable_str(s.f_bavail, s.f_bsize, df_disp_hr), |
| blocks_percent_used, mount_point); |
| #else |
| 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 |
| } |
| |
| } while (1); |
| |
| fflush_stdout_and_exit(status); |
| } |