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#include "internal.h"
#include <stdio.h>
#include <mntent.h>
#include <sys/stat.h>
#include <sys/vfs.h>
const char df_usage[] = "df [filesystem ...]\n"
"\n"
"\tPrint the filesystem space used and space available.\n";
static int
df(const char * device, const char * mountPoint)
{
struct statfs s;
long blocks_used;
long blocks_percent_used;
if ( statfs(mountPoint, &s) != 0 ) {
name_and_error(mountPoint);
return 1;
}
if ( s.f_blocks > 0 ) {
blocks_used = s.f_blocks - s.f_bfree;
blocks_percent_used = (long)
(blocks_used * 100.0 / (blocks_used + s.f_bavail) + 0.5);
/*
printf(
"%-20s %7ld %7ld %7ld %5ld%% %s\n"
,device
,s.f_blocks
,s.f_blocks - s.f_bfree
,s.f_bavail
,blocks_percent_used
,mountPoint);
*/
printf(
"%-20s %7.0f %7.0f %7.0f %5ld%% %s\n"
,device
,s.f_blocks * (s.f_bsize / 1024.0)
,(s.f_blocks - s.f_bfree) * (s.f_bsize / 1024.0)
,s.f_bavail * (s.f_bsize / 1024.0)
,blocks_percent_used
,mountPoint);
}
return 0;
}
extern int
df_main(struct FileInfo * i, int argc, char * * argv)
{
static const char header[] =
"Filesystem 1024-blocks Used Available Capacity Mounted on\n";
printf(header);
if ( argc > 1 ) {
struct mntent * mountEntry;
int status;
while ( argc > 1 ) {
if ( (mountEntry = findMountPoint(argv[1], "/etc/mtab")) == 0
&& (mountEntry = findMountPoint(argv[1], "/proc/mounts")) == 0 )
{
fprintf(stderr, "%s: can't find mount point.\n"
,argv[1]);
return 1;
}
status = df(mountEntry->mnt_fsname, mountEntry->mnt_dir);
if ( status != 0 )
return status;
argc--;
argv++;
}
return 0;
}
else {
FILE * mountTable;
struct mntent * mountEntry;
if ( (mountTable = setmntent("/etc/mtab", "r")) == 0
&& (mountTable = setmntent("/proc/mounts", "r")) == 0
) {
name_and_error("/etc/mtab");
return 1;
}
while ( (mountEntry = getmntent(mountTable)) != 0 ) {
int status = df(
mountEntry->mnt_fsname
,mountEntry->mnt_dir);
if ( status != 0 )
return status;
}
endmntent(mountTable);
}
return 0;
}
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