From: Paul Eggert Date: Tue, 4 Jan 2000 22:54:54 +0000 (+0000) Subject: Initial revision X-Git-Url: https://git.brokenzipper.com/gitweb?a=commitdiff_plain;h=78646b1f11e7c264f10050e400ccdef93a9a1ad7;p=chaz%2Ftar Initial revision --- diff --git a/lib/savedir.c b/lib/savedir.c new file mode 100644 index 0000000..29b3842 --- /dev/null +++ b/lib/savedir.c @@ -0,0 +1,137 @@ +/* savedir.c -- save the list of files in a directory in a string + Copyright (C) 1990, 1997, 1998, 1999, 2000 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +/* Written by David MacKenzie . */ + +#if HAVE_CONFIG_H +# include +#endif + +#include + +#if HAVE_UNISTD_H +# include +#endif + +#if HAVE_DIRENT_H +# include +# define NAMLEN(dirent) strlen((dirent)->d_name) +#else +# define dirent direct +# define NAMLEN(dirent) (dirent)->d_namlen +# if HAVE_SYS_NDIR_H +# include +# endif +# if HAVE_SYS_DIR_H +# include +# endif +# if HAVE_NDIR_H +# include +# endif +#endif + +#ifdef CLOSEDIR_VOID +/* Fake a return value. */ +# define CLOSEDIR(d) (closedir (d), 0) +#else +# define CLOSEDIR(d) closedir (d) +#endif + +#ifdef STDC_HEADERS +# include +# include +#else +char *malloc (); +char *realloc (); +#endif +#ifndef NULL +# define NULL 0 +#endif + +#ifndef stpcpy +char *stpcpy (); +#endif + +#include "savedir.h" + +/* 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) +{ + 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. */ + name_size += !name_size; + + 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 (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; +}