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#include "create_dir.h"
#include "debug.h"
#include "random.h"
#include "stringtools.h"
#include "timestamp.h"
#include "unlink_recursive.h"
#include <errno.h>
#include <string.h>
#include <sys/stat.h>
#include "trash.h"
static char *trashdir = 0;
void trash_setup(const char *dir)
{
if (trashdir) {
if (!strcmp(dir, trashdir)) {
/* same directory, no problem */
} else {
notice(D_NOTICE, "Trash directory already setup to %s. Ignoring setup for %s.", trashdir, dir);
}
return;
}
trashdir = strdup(dir);
create_dir(trashdir, 0700);
random_init();
}
/*
A direct unlink of a file may fail, in particular if the file
is being executed by a process. To avoid the problem of unlinkable
files, we instead move a file to a random name within the trash directory,
and then attempt to delete it there. If that fails, it's ok b/c we will
get it later on the next attempt to empty the trash.
*/
#define TRASH_COOKIE_LENGTH 8
void trash_file(const char *filename)
{
struct stat info;
/* If the original file doesn't exist, then return success. */
int result = stat(filename, &info);
if (result < 0 && errno == ENOENT)
return;
/* Generate a unique random name */
char cookie[TRASH_COOKIE_LENGTH];
string_cookie(cookie, TRASH_COOKIE_LENGTH);
char *trashname = string_format("%s/%s.%" PRIu64, trashdir, cookie, timestamp_get());
debug(D_DEBUG, "trashing file %s", filename);
/* Move the file to the trash directory. */
result = rename(filename, trashname);
if (result != 0) {
fatal("failed to move file (%s) to trash location (%s): %s", filename, trashname, strerror(errno));
}
trash_empty();
free(trashname);
}
void trash_empty()
{
int result = unlink_dir_contents(trashdir);
if (result != 0) {
warn(D_ERROR, "unable to delete all items in trash directory (%s), will try again later.", trashdir);
}
}
/* vim: set noexpandtab tabstop=8: */
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