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/* vi: set sw=4 ts=4: */
/*
* df.c - report free disk space.
*
* Implemented roughly according to SUSv3:
* http://www.opengroup.org/onlinepubs/009695399/utilities/df.html
*
* usage: df [-k] [-P|-t] [file...]
*/
#include "toys.h"
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 (toy.df.fstype) {
struct arg_list *al;
for (al = toy.df.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 ? : 1;
size = (long)((block * mt->statvfs.f_blocks) / toy.df.units);
used = (long)((block * (mt->statvfs.f_blocks-mt->statvfs.f_bfree))
/ toy.df.units);
avail = (long)((block
* (getuid() ? mt->statvfs.f_bavail : mt->statvfs.f_bfree))
/ toy.df.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);
}
}
int df_main(void)
{
struct mtab_list *mt, *mt2, *mtlist;
// Handle -P and -k
toy.df.units = 1024;
if (CFG_DF_PEDANTIC && (toys.optflags & 8)) {
// Units are 512 bytes if you select "pedantic" without "kilobytes".
if ((toys.optflags&3) == 1) toy.df.units = 512;
printf("Filesystem %ld-blocks Used Available Capacity Mounted on\n",
toy.df.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_free(mtlist, NULL);
return 0;
}
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