diff options
Diffstat (limited to 'lib/savedir.c')
| -rw-r--r-- | lib/savedir.c | 96 |
1 files changed, 55 insertions, 41 deletions
diff --git a/lib/savedir.c b/lib/savedir.c index c92e62eadccd..d930fb4af273 100644 --- a/lib/savedir.c +++ b/lib/savedir.c @@ -1,7 +1,7 @@ /* savedir.c -- save the list of files in a directory in a string - Copyright 1990, 1997, 1998, 1999, 2000, 2001, 2003, 2004 Free - Software Foundation, Inc. + Copyright (C) 1990, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005, + 2006 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 @@ -15,13 +15,11 @@ 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. */ + Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ /* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */ -#if HAVE_CONFIG_H -# include <config.h> -#endif +#include <config.h> #include "savedir.h" @@ -29,68 +27,62 @@ #include <errno.h> -#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 -/* Fake a return value. */ -# define CLOSEDIR(d) (closedir (d), 0) -#else -# define CLOSEDIR(d) closedir (d) +#include <dirent.h> +#ifndef _D_EXACT_NAMLEN +# define _D_EXACT_NAMLEN(dp) strlen ((dp)->d_name) #endif #include <stddef.h> #include <stdlib.h> #include <string.h> +#include "openat.h" #include "xalloc.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. - Return NULL (setting errno) if DIR cannot be opened, read, or closed. */ - #ifndef NAME_SIZE_DEFAULT # define NAME_SIZE_DEFAULT 512 #endif -char * -savedir (const char *dir) +/* The results of opendir() in this file are not used with dirfd and fchdir, + therefore save some unnecessary work in fchdir.c. */ +#undef opendir +#undef closedir + +/* Return a freshly allocated string containing the file names + in directory DIRP, separated by '\0' characters; + the end is marked by two '\0' characters in a row. + Return NULL (setting errno) if DIRP cannot be read or closed. + If DIRP is NULL, return NULL without affecting errno. */ + +static char * +savedirstream (DIR *dirp) { - 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) + for (;;) { + struct dirent const *dp; + char const *entry; + + errno = 0; + dp = readdir (dirp); + if (! dp) + break; + /* Skip "", ".", and "..". "" is returned by at least one buggy implementation: Solaris 2.4 readdir on NFS file systems. */ - char const *entry = dp->d_name; + entry = dp->d_name; if (entry[entry[0] != '.' ? 0 : entry[1] != '.' ? 1 : 2] != '\0') { - size_t entry_size = strlen (entry) + 1; + size_t entry_size = _D_EXACT_NAMLEN (dp) + 1; if (used + entry_size < used) xalloc_die (); if (allocated <= used + entry_size) @@ -111,7 +103,7 @@ savedir (const char *dir) } name_space[used] = '\0'; save_errno = errno; - if (CLOSEDIR (dirp) != 0) + if (closedir (dirp) != 0) save_errno = errno; if (save_errno != 0) { @@ -121,3 +113,25 @@ savedir (const char *dir) } return name_space; } + +/* Return a freshly allocated string containing the file names + in directory DIR, separated by '\0' characters; + the end is marked by two '\0' characters in a row. + Return NULL (setting errno) if DIR cannot be opened, read, or closed. */ + +char * +savedir (char const *dir) +{ + return savedirstream (opendir (dir)); +} + +/* Return a freshly allocated string containing the file names + in directory FD, separated by '\0' characters; + the end is marked by two '\0' characters in a row. + Return NULL (setting errno) if FD cannot be read or closed. */ + +char * +fdsavedir (int fd) +{ + return savedirstream (fdopendir (fd)); +} |