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+/* vi: set sw=4 ts=4:
+ *
+ * df.c - report free disk space.
+ *
+ * Copyright 2006 Rob Landley <rob@landley.net>
+ *
+ * See http://www.opengroup.org/onlinepubs/009695399/utilities/df.html
+
+USE_DF(NEWTOY(df, "Pkt*a", TOYFLAG_USR|TOYFLAG_SBIN))
+
+config DF
+ bool "df (disk free)"
+ default y
+ help
+ usage: df [-t type] [FILESYSTEM ...]
+
+ The "disk free" command, df shows total/used/available disk space for
+ each filesystem listed on the command line, or all currently mounted
+ filesystems.
+
+ -t type
+ Display only filesystems of this type.
+
+config DF_PEDANTIC
+ bool "options -P and -k"
+ default y
+ depends on DF
+ help
+ usage: df [-Pk]
+
+ -P The SUSv3 "Pedantic" option
+
+ Provides a slightly less useful output format dictated by
+ the Single Unix Specification version 3, and sets the
+ units to 512 bytes instead of the default 1024 bytes.
+
+ -k Sets units back to 1024 bytes (the default without -P)
+*/
+
+#include "toys.h"
+
+DEFINE_GLOBALS(
+ struct arg_list *fstype;
+
+ long units;
+)
+
+#define TT this.df
+
+static void show_mt(struct mtab_list *mt)
+{
+ int len;
+ long size, used, avail, percent;
+ uint64_t block;
+
+ // Return if it wasn't found (should never happen, but with /etc/mtab...)
+ if (!mt) return;
+
+ // If we have -t, skip other filesystem types
+ if (TT.fstype) {
+ struct arg_list *al;
+
+ for (al = TT.fstype; al; al = al->next) {
+ if (!strcmp(mt->type, al->arg)) break;
+ }
+ if (!al) return;
+ }
+
+ // If we don't have -a, skip synthetic filesystems
+ if (!(toys.optflags & 1) && !mt->statvfs.f_blocks) return;
+
+ // Figure out how much total/used/free space this filesystem has,
+ // forcing 64-bit math because filesystems are big now.
+ block = mt->statvfs.f_bsize ? mt->statvfs.f_bsize : 1;
+ size = (long)((block * mt->statvfs.f_blocks) / TT.units);
+ used = (long)((block * (mt->statvfs.f_blocks-mt->statvfs.f_bfree))
+ / TT.units);
+ avail = (long)((block
+ * (getuid() ? mt->statvfs.f_bavail : mt->statvfs.f_bfree))
+ / TT.units);
+ percent = size ? 100-(long)((100*(uint64_t)avail)/size) : 0;
+
+ // Figure out appropriate spacing
+ len = 25 - strlen(mt->device);
+ if (len < 1) len = 1;
+ if (CFG_DF_PEDANTIC && (toys.optflags & 8)) {
+ printf("%s %ld %ld %ld %ld%% %s\n", mt->device, size, used, avail,
+ percent, mt->dir);
+ } else {
+ printf("%s% *ld % 10ld % 9ld % 3ld%% %s\n",mt->device, len,
+ size, used, avail, percent, mt->dir);
+ }
+}
+
+void df_main(void)
+{
+ struct mtab_list *mt, *mt2, *mtlist;
+
+ // Handle -P and -k
+ TT.units = 1024;
+ if (CFG_DF_PEDANTIC && (toys.optflags & 8)) {
+ // Units are 512 bytes if you select "pedantic" without "kilobytes".
+ if ((toys.optflags&3) == 1) TT.units = 512;
+ printf("Filesystem %ld-blocks Used Available Capacity Mounted on\n",
+ TT.units);
+ } else puts("Filesystem\t1K-blocks\tUsed Available Use% Mounted on");
+
+ mtlist = getmountlist(1);
+
+ // If we have a list of filesystems on the command line, loop through them.
+ if (*toys.optargs) {
+ char **next;
+
+ for(next = toys.optargs; *next; next++) {
+ struct stat st;
+
+ // Stat it (complain if we can't).
+ if(stat(*next, &st)) {
+ perror_msg("`%s'", *next);
+ toys.exitval = 1;
+ continue;
+ }
+
+ // Find and display this filesystem. Use _last_ hit in case of
+ // -- bind mounts.
+ mt2 = NULL;
+ for (mt = mtlist; mt; mt = mt->next)
+ if (st.st_dev == mt->stat.st_dev) mt2 = mt;
+ show_mt(mt2);
+ }
+ } else {
+ // Get and loop through mount list.
+
+ for (mt = mtlist; mt; mt = mt->next) {
+ struct mtab_list *mt2, *mt3;
+
+ if (!mt->stat.st_dev) continue;
+
+ // Filter out overmounts.
+ mt3 = mt;
+ for (mt2 = mt->next; mt2; mt2 = mt2->next) {
+ if (mt->stat.st_dev == mt2->stat.st_dev) {
+ // For --bind mounts, take last match
+ if (!strcmp(mt->device, mt2->device)) mt3 = mt2;
+ // Filter out overmounts
+ mt2->stat.st_dev = 0;
+ }
+ }
+ show_mt(mt3);
+ }
+ }
+
+ if (CFG_TOYBOX_FREE) llist_traverse(mtlist, free);
+}