#if HAVE_CONFIG_H
# include <config.h>
#endif
#include <sys/types.h>
#include <errno.h>
#ifndef errno
extern int errno;
#endif
#if HAVE_DIRENT_H
# include <dirent.h>
#else
# define dirent direct
# if HAVE_SYS_NDIR_H
# include <sys/ndir.h>
# endif
# if HAVE_SYS_DIR_H
# include <sys/dir.h>
# endif
# if HAVE_NDIR_H
# include <ndir.h>
# endif
#endif
#ifdef CLOSEDIR_VOID
# define CLOSEDIR(d) (closedir (d), 0)
#else
# define CLOSEDIR(d) closedir (d)
#endif
#ifdef STDC_HEADERS
# include <stdlib.h>
# include <string.h>
#endif
#ifndef NULL
# define NULL 0
#endif
#include "savedir.h"
#include "xalloc.h"
#ifndef NAME_SIZE_DEFAULT
# define NAME_SIZE_DEFAULT 512
#endif
char *
savedir (const char *dir)
{
DIR *dirp;
struct dirent *dp;
char *name_space;
size_t allocated = NAME_SIZE_DEFAULT;
size_t used = 0;
int save_errno;
dirp = opendir (dir);
if (dirp == NULL)
return NULL;
name_space = xmalloc (allocated);
errno = 0;
while ((dp = readdir (dirp)) != NULL)
{
char const *entry = dp->d_name;
if (entry[entry[0] != '.' ? 0 : entry[1] != '.' ? 1 : 2] != '\0')
{
size_t entry_size = strlen (entry) + 1;
if (used + entry_size < used)
xalloc_die ();
if (allocated <= used + entry_size)
{
do
{
if (2 * allocated < allocated)
xalloc_die ();
allocated *= 2;
}
while (allocated <= used + entry_size);
name_space = xrealloc (name_space, allocated);
}
memcpy (name_space + used, entry, entry_size);
used += entry_size;
}
}
name_space[used] = '\0';
save_errno = errno;
if (CLOSEDIR (dirp) != 0)
save_errno = errno;
if (save_errno != 0)
{
free (name_space);
errno = save_errno;
return NULL;
}
return name_space;
}