df: add support for more options, add some coreutils 6.10 compat.
by Bernhard Reutner-Fischer function old new delta df_main 664 795 +131 packed_usage 24812 24862 +50 make_human_readable_str 213 262 +49 static.ignored_mounts - 8 +8 static.unit_chars - 7 +7 static.zero_and_units 6 - -6 ------------------------------------------------------------------------------ (add/remove: 2/1 grow/shrink: 3/0 up/down: 245/-6) Total: 239 bytes
This commit is contained in:
Denis Vlasenko
parent
3b80cac953
commit
d66aa3c701
@ -136,12 +136,12 @@ config DF
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df reports the amount of disk space used and available
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on filesystems.
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config FEATURE_DF_INODE
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bool "Enable -i (inode information)"
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config FEATURE_DF_FANCY
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bool "Enable -a, -i, -B"
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default n
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depends on DF
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help
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This option enables support for df -i.
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This option enables -a, -i and -B.
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config DIRNAME
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bool "dirname"
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@ -8,7 +8,7 @@
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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/* BB_AUDIT SUSv3 _NOT_ compliant -- options -P and -t missing. Also blocksize. */
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/* BB_AUDIT SUSv3 _NOT_ compliant -- option -t missing. */
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/* http://www.opengroup.org/onlinepubs/007904975/utilities/df.html */
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/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
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@ -16,6 +16,10 @@
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* Size reduction. Removed floating point dependency. Added error checking
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* on output. Output stats on 0-sized filesystems if specifically listed on
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* the command line. Properly round *-blocks, Used, and Available quantities.
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*
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* Aug 28, 2008 Bernhard Reutner-Fischer
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*
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* Implement -P and -B; better coreutils compat; cleanup
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*/
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#include <mntent.h>
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@ -34,51 +38,73 @@ int df_main(int argc, char **argv)
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{
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unsigned long blocks_used;
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unsigned blocks_percent_used;
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#if ENABLE_FEATURE_HUMAN_READABLE
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unsigned df_disp_hr = 1024;
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#endif
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unsigned long df_disp_hr = 1024;
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int status = EXIT_SUCCESS;
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unsigned opt;
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FILE *mount_table;
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struct mntent *mount_entry;
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struct statfs s;
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/* default display is kilobytes */
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const char *disp_units_hdr = "1k-blocks";
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static const char ignored_mounts[] ALIGN1 =
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"rootfs\0";
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enum {
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OPT_ALL = (1 << 0),
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OPT_INODE = (ENABLE_FEATURE_HUMAN_READABLE ? (1 << 4) : (1 << 2))
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* ENABLE_FEATURE_DF_INODE
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OPT_KILO = (1 << 0),
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OPT_POSIX = (1 << 1),
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OPT_ALL = (1 << 2) * ENABLE_FEATURE_DF_FANCY,
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OPT_INODE = (1 << 3) * ENABLE_FEATURE_DF_FANCY,
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OPT_BSIZE = (1 << 4) * ENABLE_FEATURE_DF_FANCY,
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OPT_HUMAN = (1 << 5) * ENABLE_FEATURE_HUMAN_READABLE,
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OPT_MEGA = (1 << 6) * ENABLE_FEATURE_HUMAN_READABLE,
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};
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const char *disp_units_hdr = NULL;
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char *chp;
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#if ENABLE_FEATURE_HUMAN_READABLE
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opt_complementary = "h-km:k-hm:m-hk";
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opt = getopt32(argv, "ahmk" USE_FEATURE_DF_INODE("i"));
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if (opt & (1 << 1)) { // -h
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#if ENABLE_FEATURE_HUMAN_READABLE && ENABLE_FEATURE_DF_FANCY
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opt_complementary = "k-mB:m-Bk:B-km";
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#elif ENABLE_FEATURE_HUMAN_READABLE
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opt_complementary = "k-m:m-k";
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#endif
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opt = getopt32(argv, "kP"
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USE_FEATURE_DF_FANCY("aiB:")
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USE_FEATURE_HUMAN_READABLE("hm")
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USE_FEATURE_DF_FANCY(, &chp));
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if (opt & OPT_MEGA)
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df_disp_hr = 1024*1024;
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if (opt & OPT_BSIZE)
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df_disp_hr = xatoul_range(chp, 1, ULONG_MAX); /* disallow 0 */
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/* From the manpage of df from coreutils-6.10:
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Disk space is shown in 1K blocks by default, unless the environment
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variable POSIXLY_CORRECT is set, in which case 512-byte blocks are used.
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*/
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if (getenv("POSIXLY_CORRECT")) /* TODO - a new libbb function? */
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df_disp_hr = 512;
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if (opt & OPT_HUMAN) {
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df_disp_hr = 0;
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disp_units_hdr = " Size";
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}
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if (opt & (1 << 2)) { // -m
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df_disp_hr = 1024*1024;
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disp_units_hdr = "1M-blocks";
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}
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if (opt & OPT_INODE) {
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if (opt & OPT_INODE)
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disp_units_hdr = " Inodes";
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}
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#else
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opt = getopt32(argv, "ak" USE_FEATURE_DF_INODE("i"));
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#endif
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printf("Filesystem %-15sUsed Available Use%% Mounted on\n",
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disp_units_hdr);
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if (disp_units_hdr == NULL) {
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#if ENABLE_FEATURE_HUMAN_READABLE
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disp_units_hdr = xasprintf("%s-blocks",
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make_human_readable_str(df_disp_hr, 0, !!(opt & OPT_POSIX)));
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#else
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disp_units_hdr = xasprintf("%d-blocks", df_disp_hr);
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#endif
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}
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printf("Filesystem %-15sUsed Available %s Mounted on\n",
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disp_units_hdr, (opt & OPT_POSIX) ? "Capacity" : "Use%");
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mount_table = NULL;
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argv += optind;
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if (optind >= argc) {
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mount_table = setmntent(bb_path_mtab_file, "r");
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if (!mount_table) {
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if (!mount_table)
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bb_perror_msg_and_die(bb_path_mtab_file);
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}
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}
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while (1) {
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@ -93,9 +119,8 @@ int df_main(int argc, char **argv)
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}
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} else {
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mount_point = *argv++;
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if (!mount_point) {
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if (!mount_point)
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break;
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}
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mount_entry = find_mount_point(mount_point, bb_path_mtab_file);
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if (!mount_entry) {
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bb_error_msg("%s: can't find mount point", mount_point);
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@ -118,10 +143,9 @@ int df_main(int argc, char **argv)
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s.f_blocks = s.f_files;
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s.f_bavail = s.f_bfree = s.f_ffree;
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s.f_bsize = 1;
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#if ENABLE_FEATURE_HUMAN_READABLE
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if (df_disp_hr)
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df_disp_hr = 1;
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#endif
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}
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blocks_used = s.f_blocks - s.f_bfree;
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blocks_percent_used = 0;
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@ -131,11 +155,10 @@ int df_main(int argc, char **argv)
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) / (blocks_used + s.f_bavail);
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}
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#ifdef WHY_IT_SHOULD_BE_HIDDEN
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if (strcmp(device, "rootfs") == 0) {
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/* GNU coreutils 6.10 skip certain mounts, try to be compatible. */
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if (index_in_strings(device, ignored_mounts) != -1)
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continue;
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}
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#endif
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#ifdef WHY_WE_DO_IT_FOR_DEV_ROOT_ONLY
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/* ... and also this is the only user of find_block_device */
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if (strcmp(device, "/dev/root") == 0) {
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@ -164,12 +187,12 @@ int df_main(int argc, char **argv)
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#else
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printf(" %9lu %9lu %9lu %3u%% %s\n",
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kscale(s.f_blocks, s.f_bsize),
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kscale(s.f_blocks-s.f_bfree, s.f_bsize),
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kscale(s.f_blocks - s.f_bfree, s.f_bsize),
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kscale(s.f_bavail, s.f_bsize),
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blocks_percent_used, mount_point);
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#endif
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}
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}
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fflush_stdout_and_exit(status);
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return status;
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}
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@ -705,36 +705,40 @@
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"\n do not poll for events" \
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)
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/* -k is accepted but ignored for !HUMAN_READABLE,
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* but we won't mention this (unimportant) */
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#if ENABLE_FEATURE_HUMAN_READABLE || ENABLE_FEATURE_DF_INODE
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#define DF_HAS_OPTIONS(x) x
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#else
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#define DF_HAS_OPTIONS(x)
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#endif
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#define df_trivial_usage \
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DF_HAS_OPTIONS("[-") \
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USE_FEATURE_HUMAN_READABLE("hmk") USE_FEATURE_DF_INODE("i") \
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DF_HAS_OPTIONS("] ") "[FILESYSTEM...]"
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"[-Pk" \
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USE_FEATURE_HUMAN_READABLE("mh") \
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USE_FEATURE_DF_FANCY("ai] [-B SIZE") \
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"] [FILESYSTEM...]"
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#define df_full_usage "\n\n" \
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"Print filesystem usage statistics\n" \
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DF_HAS_OPTIONS("\nOptions:") \
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"\nOptions:" \
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"\n -P POSIX output format" \
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"\n -k 1024-byte blocks (default)" \
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USE_FEATURE_HUMAN_READABLE( \
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"\n -m 1M-byte blocks" \
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"\n -h Human readable (e.g. 1K 243M 2G)" \
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"\n -m 1024*1024 blocks" \
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"\n -k 1024 blocks" \
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) \
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USE_FEATURE_DF_INODE( \
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USE_FEATURE_DF_FANCY( \
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"\n -a Show all filesystems" \
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"\n -i Inodes" \
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)
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"\n -B SIZE Blocksize" \
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) \
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#define df_example_usage \
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"$ df\n" \
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"Filesystem 1k-blocks Used Available Use% Mounted on\n" \
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"Filesystem 1K-blocks Used Available Use% Mounted on\n" \
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"/dev/sda3 8690864 8553540 137324 98% /\n" \
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"/dev/sda1 64216 36364 27852 57% /boot\n" \
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"$ df /dev/sda3\n" \
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"Filesystem 1k-blocks Used Available Use% Mounted on\n" \
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"/dev/sda3 8690864 8553540 137324 98% /\n"
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"Filesystem 1K-blocks Used Available Use% Mounted on\n" \
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"/dev/sda3 8690864 8553540 137324 98% /\n" \
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"$ POSIXLY_CORRECT=sure df /dev/sda3\n" \
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"Filesystem 512B-blocks Used Available Use% Mounted on\n" \
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"/dev/sda3 17381728 17107080 274648 98% /\n" \
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"$ POSIXLY_CORRECT=yep df -P /dev/sda3\n" \
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"Filesystem 512-blocks Used Available Capacity Mounted on\n" \
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"/dev/sda3 17381728 17107080 274648 98% /\n"
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#define dhcprelay_trivial_usage \
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"[client1,client2,...] [server_device]"
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@ -32,7 +32,9 @@ const char* FAST_FUNC make_human_readable_str(unsigned long long size,
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unsigned long block_size, unsigned long display_unit)
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{
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/* The code will adjust for additional (appended) units */
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static const char zero_and_units[] ALIGN1 = { '0', 0, 'k', 'M', 'G', 'T' };
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static const char unit_chars[] ALIGN1 = {
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'\0', 'K', 'M', 'G', 'T', 'P', 'E'
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};
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static const char fmt[] ALIGN1 = "%llu";
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static const char fmt_tenths[] ALIGN1 = "%llu.%d%c";
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@ -42,26 +44,33 @@ const char* FAST_FUNC make_human_readable_str(unsigned long long size,
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int frac;
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const char *u;
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const char *f;
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smallint no_tenths;
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u = zero_and_units;
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if (size == 0)
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return "0";
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/* If block_size is 0 then do not print tenths */
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no_tenths = 0;
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if (block_size == 0) {
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no_tenths = 1;
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block_size = 1;
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}
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u = unit_chars;
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val = size * block_size;
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f = fmt;
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frac = 0;
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val = size * block_size;
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if (val == 0) {
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return u;
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}
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if (display_unit) {
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val += display_unit/2; /* Deal with rounding */
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val /= display_unit; /* Don't combine with the line above!!! */
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/* will just print it as ulonglong (below) */
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} else {
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++u;
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while ((val >= 1024)
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&& (u < zero_and_units + sizeof(zero_and_units) - 1)
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&& (u < unit_chars + sizeof(unit_chars) - 1)
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) {
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f = fmt_tenths;
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++u;
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u++;
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frac = (((int)(val % 1024)) * 10 + 1024/2) / 1024;
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val /= 1024;
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}
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@ -69,9 +78,9 @@ const char* FAST_FUNC make_human_readable_str(unsigned long long size,
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++val;
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frac = 0;
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}
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#if 0
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#if 1
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/* Sample code to omit decimal point and tenths digit. */
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if (/* no_tenths */ 1) {
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if (no_tenths) {
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if (frac >= 5) {
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++val;
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}
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@ -153,7 +153,7 @@ CONFIG_DD=y
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CONFIG_FEATURE_DD_SIGNAL_HANDLING=y
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CONFIG_FEATURE_DD_IBS_OBS=y
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CONFIG_DF=y
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CONFIG_FEATURE_DF_INODE=y
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CONFIG_FEATURE_DF_FANCY=y
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CONFIG_DIRNAME=y
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CONFIG_DOS2UNIX=y
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CONFIG_UNIX2DOS=y
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