/* Return a freshly allocated string containing the filenames
in directory DIR, separated by '\0' characters;
the end is marked by two '\0' characters in a row.
NAME_SIZE is the number of bytes to initially allocate
for the string; it will be enlarged as needed.
Return NULL if DIR cannot be opened or if out of memory. */
char *
savedir (const char *dir, off_t name_size, struct exclude *included_patterns,
struct exclude *excluded_patterns)
{
DIR *dirp;
struct dirent *dp;
char *name_space;
char *namep;
dirp = opendir (dir);
if (dirp == NULL)
return NULL;
/* Be sure name_size is at least `1' so there's room for
the final NUL byte. */
if (name_size <= 0)
name_size = 1;
name_space = (char *) malloc (name_size);
if (name_space == NULL)
{
closedir (dirp);
return NULL;
}
namep = name_space;
while ((dp = readdir (dirp)) != NULL)
{
/* Skip "." and ".." (some NFS filesystems' directories lack them). */
if (dp->d_name[0] != '.'
|| (dp->d_name[1] != '\0'
&& (dp->d_name[1] != '.' || dp->d_name[2] != '\0')))
{
off_t size_needed = (namep - name_space) + NAMLEN (dp) + 2;
if ((included_patterns || excluded_patterns)
&& !isdir1 (dir, dp->d_name))
{
if (included_patterns
&& !excluded_filename (included_patterns, path, 0))
continue;
if (excluded_patterns
&& excluded_filename (excluded_patterns, path, 0))
continue;
}
if (size_needed > name_size)
{
char *new_name_space;
while (size_needed > name_size)
name_size += 1024;
new_name_space = realloc (name_space, name_size);
if (new_name_space == NULL)
{
closedir (dirp);
return NULL;
}
namep += new_name_space - name_space;
name_space = new_name_space;
}
namep = stpcpy (namep, dp->d_name) + 1;
}
}
*namep = '\0';
if (CLOSEDIR (dirp))
{
free (name_space);
return NULL;
}
if (path)
{
free (path);
path = NULL;
pathlen = 0;
}
return name_space;
}
static bool
dir_read (struct file_data const *dir, struct dirdata *dirdata)
{
register struct dirent *next;
register size_t i;
/* Address of block containing the files that are described. */
char const **names;
/* Number of files in directory. */
size_t nnames;
/* Allocated and used storage for file name data. */
char *data;
size_t data_alloc, data_used;
dirdata->names = 0;
dirdata->data = 0;
nnames = 0;
data = 0;
if (dir->desc != -1)
{
/* Open the directory and check for errors. */
register DIR *reading = opendir (dir->name);
if (!reading)
return false;
/* Initialize the table of filenames. */
data_alloc = 512;
data_used = 0;
dirdata->data = data = xmalloc (data_alloc);
/* Read the directory entries, and insert the subfiles
into the `data' table. */
while ((errno = 0, (next = readdir (reading)) != 0))
{
char *d_name = next->d_name;
size_t d_size = NAMLEN (next) + 1;
/* Ignore "." and "..". */
if (d_name[0] == '.'
&& (d_name[1] == 0 || (d_name[1] == '.' && d_name[2] == 0)))
continue;
if (excluded_filename (excluded, d_name))
continue;
while (data_alloc < data_used + d_size)
{
if (PTRDIFF_MAX / 2 <= data_alloc)
xalloc_die ();
dirdata->data = data = xrealloc (data, data_alloc *= 2);
}
memcpy (data + data_used, d_name, d_size);
data_used += d_size;
nnames++;
}
if (errno)
{
int e = errno;
closedir (reading);
errno = e;
return false;
}
#if CLOSEDIR_VOID
closedir (reading);
#else
if (closedir (reading) != 0)
return false;
#endif
}
/* Create the `names' table from the `data' table. */
if (PTRDIFF_MAX / sizeof *names - 1 <= nnames)
xalloc_die ();
dirdata->names = names = xmalloc ((nnames + 1) * sizeof *names);
dirdata->nnames = nnames;
for (i = 0; i < nnames; i++)
{
names[i] = data;
data += strlen (data) + 1;
}
names[nnames] = 0;
return true;
}
