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Implement df -hk

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This commit is contained in:
Jeffrey Picard 2014-10-18 18:15:26 +01:00 committed by sin
parent 7e2fe55d68
commit dc3a9d9e2a
1 changed files with 66 additions and 7 deletions
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71
df.c
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@ -8,6 +8,11 @@
#include "util.h"
static long blksize = 512;
static int aflag = 0;
static int hflag = 0;
static int kflag = 0;
static void mnt_show(const char *fsname, const char *dir);
static void
@ -21,21 +26,34 @@ main(int argc, char *argv[])
{
struct mntent *me = NULL;
FILE *fp;
int aflag = 0;
ARGBEGIN {
case 'a':
aflag = 1;
break;
case 's':
case 'h':
hflag = 1;
break;
case 'k':
kflag = 1;
blksize = 1024;
break;
case 's':
case 'i':
eprintf("not implemented\n");
default:
usage();
} ARGEND;
printf("Filesystem 512-blocks Used Avail Capacity Mounted on\n");
if (kflag && hflag)
hflag = 0;
if (hflag)
printf("Filesystem Size Used "
"Avail Capacity Mounted on\n");
else
printf("Filesystem %ld-blocks Used "
"Avail Capacity Mounted on\n", blksize);
fp = setmntent("/proc/mounts", "r");
if (!fp)
@ -51,6 +69,45 @@ main(int argc, char *argv[])
return 0;
}
#define CALC_POWER(n, power, base, i) do { \
while (n > power) { \
power = power * base; \
i++; \
} \
} while(0)
static void
print_human(
const char *fsname,
unsigned long long total,
unsigned long long used,
unsigned long long avail,
int capacity,
const char *dir)
{
long base = 1024;
unsigned long long power_total = base;
unsigned long long power_used = base;
unsigned long long power_avail = base;
char postfixes[] = {'B', 'K', 'M', 'G', 'T', 'P', 'E'};
int i = 0, j = 0, k = 0;
total = total * blksize;
used = used * blksize;
avail = avail * blksize;
CALC_POWER(total, power_total, base, i);
CALC_POWER(used, power_used, base, j);
CALC_POWER(avail, power_avail, base, k);
total = i ? total / (power_total / base) : total;
used = j ? used / (power_used / base) : used;
avail = k ? avail / (power_avail / base) : avail;
printf("%-12s %9llu%c %9llu%c %9llu%c %7d%% %s\n",
fsname, total, postfixes[i], used, postfixes[j],
avail, postfixes[k], capacity, dir);
}
static void
mnt_show(const char *fsname, const char *dir)
{
@ -61,7 +118,7 @@ mnt_show(const char *fsname, const char *dir)
statvfs(dir, &s);
bs = s.f_frsize / 512;
bs = s.f_frsize / blksize;
total = s.f_blocks * bs;
avail = s.f_bfree * bs;
used = total - avail;
@ -72,7 +129,9 @@ mnt_show(const char *fsname, const char *dir)
capacity++;
}
if (hflag)
print_human(fsname, total, used, avail, capacity, dir);
else
printf("%-12s %9llu %9llu %9llu %7d%% %s\n",
fsname, total, used, avail, capacity,
dir);
fsname, total, used, avail, capacity, dir);
}