/*
* Return the name of the new backup file for file FILE, allocated with
* malloc. Return 0 if out of memory. FILE must not end with a '/' unless it
* is the root directory. Do not call this function if backup_type == none.
*/
char *
find_backup_file_name(const char *file)
{
char *dir, *base_versions, *tmp_file;
int highest_backup;
if (backup_type == simple)
return concat(file, simple_backup_suffix);
tmp_file = strdup(file);
if (tmp_file == NULL)
return NULL;
base_versions = concat(basename(tmp_file), ".~");
free(tmp_file);
if (base_versions == NULL)
return NULL;
tmp_file = strdup(file);
if (tmp_file == NULL) {
free(base_versions);
return NULL;
}
dir = dirname(tmp_file);
if (dir == NULL) {
free(base_versions);
free(tmp_file);
return NULL;
}
highest_backup = max_backup_version(base_versions, dir);
free(base_versions);
free(tmp_file);
if (backup_type == numbered_existing && highest_backup == 0)
return concat(file, simple_backup_suffix);
return make_version_name(file, highest_backup + 1);
}
char *
find_backup_file_name (char *file)
{
char *dir;
char *base_versions;
int highest_backup;
if (backup_type == simple)
return concat (file, simple_backup_suffix);
base_versions = concat (basename (file), ".~");
if (base_versions == 0)
return 0;
dir = dirname (file);
if (dir == 0)
{
free (base_versions);
return 0;
}
highest_backup = max_backup_version (base_versions, dir);
free (base_versions);
free (dir);
if (backup_type == numbered_existing && highest_backup == 0)
return concat (file, simple_backup_suffix);
return make_version_name (file, highest_backup + 1);
}
char *
find_backup_file_name(char *file)
{
char *dir;
char *base_versions;
int highest_backup;
if (backup_type == simple)
{
char *s = malloc (strlen (file) + strlen (simple_backup_suffix) + 1);
strcpy (s, file);
addext (s, simple_backup_suffix, '~');
return s;
}
base_versions = concat (basename (file), ".~");
if (base_versions == 0)
return 0;
dir = dirname (file);
if (dir == 0)
{
free (base_versions);
return 0;
}
highest_backup = max_backup_version (base_versions, dir);
free (base_versions);
free (dir);
if (backup_type == numbered_existing && highest_backup == 0)
return concat (file, simple_backup_suffix);
return make_version_name (file, highest_backup + 1);
}
char *
find_backup_file_name (const char *file, enum backup_type backup_type)
{
size_t backup_suffix_size_max;
size_t file_len = strlen (file);
size_t numbered_suffix_size_max = INT_STRLEN_BOUND (int) + 4;
char *s;
const char *suffix = simple_backup_suffix;
/* Allow room for simple or `.~N~' backups. */
backup_suffix_size_max = strlen (simple_backup_suffix) + 1;
if (HAVE_DIR && backup_suffix_size_max < numbered_suffix_size_max)
backup_suffix_size_max = numbered_suffix_size_max;
s = malloc (file_len + backup_suffix_size_max + numbered_suffix_size_max);
if (s)
{
strcpy (s, file);
#if HAVE_DIR
if (backup_type != simple)
{
int highest_backup;
size_t dir_len = basename (s) - s;
strcpy (s + dir_len, ".");
highest_backup = max_backup_version (file + dir_len, s);
if (! (backup_type == numbered_existing && highest_backup == 0))
{
char *numbered_suffix = s + (file_len + backup_suffix_size_max);
sprintf (numbered_suffix, ".~%d~", highest_backup + 1);
suffix = numbered_suffix;
}
strcpy (s, file);
}
#endif /* HAVE_DIR */
addext (s, suffix, '~');
}
return s;
}
