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authorDenis Vlasenko <vda.linux@googlemail.com>2008-08-28 22:42:52 +0000
committerDenis Vlasenko <vda.linux@googlemail.com>2008-08-28 22:42:52 +0000
commitd66aa3c701ffb83343239e71a8b294407ff5df86 (patch)
treeeeebccfe994962aa8a33312c8726eac5adf63f5a /coreutils
parent3b80cac953b0627ba9b3337d3f9386678d436871 (diff)
downloadbusybox-d66aa3c701ffb83343239e71a8b294407ff5df86.tar.gz
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
Diffstat (limited to 'coreutils')
-rw-r--r--coreutils/Config.in6
-rw-r--r--coreutils/df.c93
2 files changed, 61 insertions, 38 deletions
diff --git a/coreutils/Config.in b/coreutils/Config.in
index 413839035..29b55d4ec 100644
--- a/coreutils/Config.in
+++ b/coreutils/Config.in
@@ -136,12 +136,12 @@ config DF
df reports the amount of disk space used and available
on filesystems.
-config FEATURE_DF_INODE
- bool "Enable -i (inode information)"
+config FEATURE_DF_FANCY
+ bool "Enable -a, -i, -B"
default n
depends on DF
help
- This option enables support for df -i.
+ This option enables -a, -i and -B.
config DIRNAME
bool "dirname"
diff --git a/coreutils/df.c b/coreutils/df.c
index 9cb328aa3..fd2502309 100644
--- a/coreutils/df.c
+++ b/coreutils/df.c
@@ -8,7 +8,7 @@
* 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. */
+/* 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)
@@ -16,6 +16,10 @@
* 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.
+ *
+ * Aug 28, 2008 Bernhard Reutner-Fischer
+ *
+ * Implement -P and -B; better coreutils compat; cleanup
*/
#include <mntent.h>
@@ -34,51 +38,73 @@ int df_main(int argc, char **argv)
{
unsigned long blocks_used;
unsigned blocks_percent_used;
-#if ENABLE_FEATURE_HUMAN_READABLE
- unsigned df_disp_hr = 1024;
-#endif
+ unsigned long df_disp_hr = 1024;
int status = EXIT_SUCCESS;
unsigned opt;
FILE *mount_table;
struct mntent *mount_entry;
struct statfs s;
- /* default display is kilobytes */
- const char *disp_units_hdr = "1k-blocks";
+ static const char ignored_mounts[] ALIGN1 =
+ "rootfs\0";
enum {
- OPT_ALL = (1 << 0),
- OPT_INODE = (ENABLE_FEATURE_HUMAN_READABLE ? (1 << 4) : (1 << 2))
- * ENABLE_FEATURE_DF_INODE
+ 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 << 5) * ENABLE_FEATURE_HUMAN_READABLE,
+ OPT_MEGA = (1 << 6) * ENABLE_FEATURE_HUMAN_READABLE,
};
+ const char *disp_units_hdr = NULL;
+ char *chp;
-#if ENABLE_FEATURE_HUMAN_READABLE
- opt_complementary = "h-km:k-hm:m-hk";
- opt = getopt32(argv, "ahmk" USE_FEATURE_DF_INODE("i"));
- if (opt & (1 << 1)) { // -h
+#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"
+ USE_FEATURE_DF_FANCY("aiB:")
+ USE_FEATURE_HUMAN_READABLE("hm")
+ USE_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 & (1 << 2)) { // -m
- df_disp_hr = 1024*1024;
- disp_units_hdr = "1M-blocks";
- }
- if (opt & OPT_INODE) {
+ if (opt & OPT_INODE)
disp_units_hdr = " Inodes";
- }
+
+ if (disp_units_hdr == NULL) {
+#if ENABLE_FEATURE_HUMAN_READABLE
+ disp_units_hdr = xasprintf("%s-blocks",
+ make_human_readable_str(df_disp_hr, 0, !!(opt & OPT_POSIX)));
#else
- opt = getopt32(argv, "ak" USE_FEATURE_DF_INODE("i"));
+ disp_units_hdr = xasprintf("%d-blocks", df_disp_hr);
#endif
-
- printf("Filesystem %-15sUsed Available Use%% Mounted on\n",
- disp_units_hdr);
+ }
+ printf("Filesystem %-15sUsed Available %s Mounted on\n",
+ disp_units_hdr, (opt & OPT_POSIX) ? "Capacity" : "Use%");
mount_table = NULL;
argv += optind;
if (optind >= argc) {
mount_table = setmntent(bb_path_mtab_file, "r");
- if (!mount_table) {
+ if (!mount_table)
bb_perror_msg_and_die(bb_path_mtab_file);
- }
}
while (1) {
@@ -93,9 +119,8 @@ int df_main(int argc, char **argv)
}
} else {
mount_point = *argv++;
- if (!mount_point) {
+ 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);
@@ -118,10 +143,9 @@ int df_main(int argc, char **argv)
s.f_blocks = s.f_files;
s.f_bavail = s.f_bfree = s.f_ffree;
s.f_bsize = 1;
-#if ENABLE_FEATURE_HUMAN_READABLE
+
if (df_disp_hr)
df_disp_hr = 1;
-#endif
}
blocks_used = s.f_blocks - s.f_bfree;
blocks_percent_used = 0;
@@ -131,11 +155,10 @@ int df_main(int argc, char **argv)
) / (blocks_used + s.f_bavail);
}
-#ifdef WHY_IT_SHOULD_BE_HIDDEN
- if (strcmp(device, "rootfs") == 0) {
+ /* GNU coreutils 6.10 skip certain mounts, try to be compatible. */
+ if (index_in_strings(device, ignored_mounts) != -1)
continue;
- }
-#endif
+
#ifdef WHY_WE_DO_IT_FOR_DEV_ROOT_ONLY
/* ... and also this is the only user of find_block_device */
if (strcmp(device, "/dev/root") == 0) {
@@ -164,12 +187,12 @@ int df_main(int argc, char **argv)
#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_blocks - s.f_bfree, s.f_bsize),
kscale(s.f_bavail, s.f_bsize),
blocks_percent_used, mount_point);
#endif
}
}
- fflush_stdout_and_exit(status);
+ return status;
}