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/*
* Determine the percentage of free space in /tmp.
*
* A simple routine to obtain the percentage of free space in /tmp. Machines
* with a full tmp partition are often unusable. Does not support Ultrix and
* hard-codes the minfree values. For unsupported systems, always reports 0%
* full.
*
* Written by Larry Schwimmer
* Copyright 1997, 2008, 2012
* The Board of Trustees of the Leland Stanford Junior University
*
* See LICENSE for licensing terms.
*/
#include <config.h>
#include <portable/statvfs.h>
#include <portable/system.h>
#include <server/internal.h>
/*
* Returns the percent full of the file system at the given path. Assume,
* just to be safe, that the user can only use 95% of the available blocks.
* (This number, minfree, may vary, but we don't have a good way of
* determining it.)
*/
int
tmp_full(const char *path)
{
struct statvfs info;
int percent = 0;
double total;
if (chdir(path) == 0 && statvfs(".", &info) == 0) {
if (info.f_bavail > info.f_blocks * 0.95)
total = info.f_blocks;
else
total = info.f_blocks * 0.95;
percent = (total - info.f_bavail) * 100.0 / total + 0.5;
if (percent < 0)
percent = 0;
if (percent > 100)
percent = 100;
}
return percent;
}
/*
* Test routine.
*/
#ifdef MAIN
int
main(void)
{
printf("%%%d percent tmp full.\n", tmp_full("/"));
# ifdef P_tmpdir
printf("%%%d percent P_tmpdir full.\n", tmp_full(P_tmpdir));
# endif
return 0;
}
#endif
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