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/*
* Copyright (c) 2013 RIPE NCC <atlas@ripe.net>
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
* dfrm.c
* Remove the contents of directories if the amount of free space gets too low
*/
#include <dirent.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/vfs.h>
#include "libbb.h"
#define DBQ(str) "\"" #str "\""
int dfrm_main(int argc, char *argv[])
{
int i;
size_t len;
uint32_t opt;
unsigned long limit, avail;
char *opt_atlas;
char *dev, *limit_str, *dir_str, *check, *path;
DIR *dir;
struct dirent *de;
struct statfs sb;
opt_atlas= NULL;
opt_complementary= NULL; /* Just in case */
opt= getopt32(argv, "A:", &opt_atlas);
if (argc < optind+3)
{
printf("not enough arguments\n");
return 1;
}
dev= argv[optind];
limit_str= argv[optind+1];
if (statfs(dev, &sb) != 0)
{
fprintf(stderr, "statfs on %s failed: %s\n",
dev, strerror(errno));
return 1;
}
printf("RESULT { ");
if (opt_atlas)
{
printf(
DBQ(id) ":" DBQ(%s) ", " DBQ(fw) ": %d, " DBQ(time) ": %ld, ",
opt_atlas, get_atlas_fw_version(), (long)time(NULL));
}
printf(DBQ(bsize) ": %ld, " DBQ(blocks) ": %ld, "
DBQ(bfree) ": %ld, " DBQ(free) ": %ld",
(long)sb.f_bsize, (long)sb.f_blocks, (long)sb.f_bfree,
(long)sb.f_bfree*(sb.f_bsize/1024));
printf(" }\n");
avail= sb.f_bavail*(sb.f_bsize/1024);
limit= strtoul(limit_str, &check, 10);
if (check[0] != '\0')
{
fprintf(stderr, "unable to parse limit '%s'\n", limit_str);
return 1;
}
if (avail > limit)
{
fprintf(stderr, "enough space free, no need to do anything\n");
return 1;
}
for (i= optind+2; i < argc; i++)
{
dir_str= argv[i];
dir= opendir(dir_str);
if (!dir)
{
fprintf(stderr, "opendir failed for '%s'\n", dir_str);
continue;
}
path= NULL;
while (de= readdir(dir), de != NULL)
{
if (strcmp(de->d_name, ".") == 0 ||
strcmp(de->d_name, "..") == 0)
{
continue;
}
len= strlen(dir_str) + 1 + strlen(de->d_name) + 1;
path= realloc(path, len); /* Avoid leaks */
if (path == NULL)
{
fprintf(stderr,
"unable to allocate %ld bytes\n",
(long)len);
continue;
}
strlcpy(path, dir_str, len);
strlcat(path, "/", len);
strlcat(path, de->d_name, len);
if (unlink(path) != 0)
{
fprintf(stderr, "unable to unlink '%s': %s\n",
path, strerror(errno));
continue;
}
fprintf(stderr, "rm %s\n", path);
}
closedir(dir);
free(path); path= NULL;
}
return 0;
}
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