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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 1, 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@ai.mit.edu>. */
-
- /* MS-DOS port (c) 1990 by Thorsten Ohl, ohl@gnu.ai.mit.edu
- This port is also distributed under the terms of the
- GNU General Public License as published by the
- Free Software Foundation.
-
- Please note that this file is not identical to the
- original GNU release, you should have received this
- code as patch to the official release.
-
- $Header: e:/gnu/fileutil/RCS/savedir.c 1.4.0.2 90/09/17 09:28:48 tho Exp $
- */
-
- #include <sys/types.h>
-
- #ifdef DIRENT
- #include <dirent.h>
- #ifdef direct
- #undef direct
- #endif
- #define direct dirent
- #define NLENGTH(direct) (strlen((direct)->d_name))
- #else
- #define NLENGTH(direct) ((direct)->d_namlen)
- #ifdef USG
- #ifdef SYSNDIR
- #include <sys/ndir.h>
- #else
- #include <ndir.h>
- #endif
- #else
- #include <sys/dir.h>
- #endif
- #endif
-
- #ifdef STDC_HEADERS
- #include <stdlib.h>
- #include <string.h>
- #else
- char *malloc ();
- char *realloc ();
- int strlen ();
- #ifndef NULL
- #define NULL 0
- #endif
- #endif
-
- #ifdef MSDOS
- #include <stdio.h>
- extern char *savedir (char *dir, unsigned name_size);
- static char *stpcpy (char *dest, char *source);
- #endif /* MSDOS */
-
- static 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 direct *dp;
- char *name_space;
- char *namep;
-
- dirp = opendir (dir);
- if (dirp == NULL)
- return NULL;
-
- #ifdef MSDOS /* stat () it ourselves ... */
- name_size = 0;
- for (dp = readdir (dirp); dp != NULL; dp = readdir (dirp))
- name_size += strlen(dp->d_name) + 1;
- seekdir(dirp, 0L);
- #endif /* MSDOS */
-
- name_space = (char *) malloc (name_size);
- if (name_space == NULL)
- 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';
- closedir (dirp);
- return name_space;
- }
-
- /* Copy SOURCE into DEST, stopping after copying the first '\0', and
- return a pointer to the '\0' at the end of DEST;
- in other words, return DEST + strlen (SOURCE). */
-
- static char *
- stpcpy (dest, source)
- char *dest;
- char *source;
- {
- while ((*dest++ = *source++) != '\0')
- /* Do nothing. */ ;
- return dest - 1;
- }
-