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- /* savedir.c -- save the list of files in a directory in a string
- Copyright (C) 1990 Free Software Foundation, Inc.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- /* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */
-
- #include <sys/types.h>
-
- #ifdef HAVE_UNISTD_H
- #include <unistd.h>
- #endif
-
- #if defined(DIRENT) || defined(_POSIX_VERSION)
- #include <dirent.h>
- #define NLENGTH(direct) (strlen((direct)->d_name))
- #else /* not (DIRENT or _POSIX_VERSION) */
- #define dirent direct
- #define NLENGTH(direct) ((direct)->d_namlen)
- #ifdef SYSNDIR
- #include <sys/ndir.h>
- #endif /* SYSNDIR */
- #ifdef SYSDIR
- #include <sys/dir.h>
- #endif /* SYSDIR */
- #ifdef NDIR
- #include <ndir.h>
- #endif /* NDIR */
- #endif /* DIRENT or _POSIX_VERSION */
-
- #ifdef VOID_CLOSEDIR
- /* Fake a return value. */
- #define CLOSEDIR(d) (closedir (d), 0)
- #else
- #define CLOSEDIR(d) closedir (d)
- #endif
-
- #ifdef STDC_HEADERS
- #include <stdlib.h>
- #include <string.h>
- #else
- char *malloc ();
- char *realloc ();
- #ifndef NULL
- #define NULL 0
- #endif
- #endif
-
- char *stpcpy ();
-
- /* 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 (dir, name_size)
- char *dir;
- unsigned name_size;
- {
- DIR *dirp;
- struct dirent *dp;
- char *name_space;
- char *namep;
-
- dirp = opendir (dir);
- if (dirp == NULL)
- return NULL;
-
- 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')))
- {
- unsigned size_needed = (namep - name_space) + NLENGTH (dp) + 2;
-
- 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;
- }
- return name_space;
- }
-