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/*
* Copyright 2020 Ryan Kavanagh <rak@rak.ac>
* Cleanup hosted temporary files
*
* Permission to use, copy, modify, and/or distribute this software for
* any purpose with or without fee is hereby granted, provided that the
* above copyright notice and this permission notice appear in all
* copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
* AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA
* OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fts.h>
#include <err.h>
#include <errno.h>
#include <math.h>
#include <stdio.h>
#include <time.h>
#include <unistd.h>
const double mind = 30.0;
const double maxd = 90.0;
const double max_size = 33554432; // 32MB
char* paths[2] = {"/var/www/users/~tmp", NULL};
int
main(int argc, char * const argv[])
{
FTS* file_system;
FTSENT* node;
struct stat attr;
double cutoff = 0;
double file_age = 0;
time_t curr_time = time(NULL);
int verbose, ch;
verbose = 0;
while ((ch = getopt(argc, argv, "v")) != -1) {
switch (ch) {
case 'v':
verbose = 1;
break;
}
}
argc -= optind;
argv += optind;
if ((file_system = fts_open(paths, 0, NULL)) == NULL)
errx(1, NULL);
while ((node = fts_read(file_system)) != NULL) {
if (node->fts_errno)
err(node->fts_errno, "%s", node->fts_path);
switch (node->fts_info) {
case FTS_F:
if (stat(node->fts_name, &attr) == -1)
err(1, NULL);
file_age = difftime(curr_time, attr.st_mtime);
cutoff = mind + (mind - maxd) * 86400 *
pow((double) attr.st_size / (double) max_size - 1, 3.0);
if (verbose)
printf("%s age %fs cuttoff %fs size %lldB\n",
node->fts_name, file_age, cutoff, attr.st_size);
if (file_age >= cutoff) {
unlink(node->fts_name);
if (verbose)
printf("%s deleted\n", node->fts_name);
}
break;
default:
break;
}
}
fts_close(file_system);
return 0;
}
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