os_dir.c

00001 /*-
00002  * See the file LICENSE for redistribution information.
00003  *
00004  * Copyright (c) 1997, 1998, 1999, 2000
00005  * Sleepycat Software. All rights reserved.
00006  */
00007 
00008 #include "config.h"
00009 
00010 #ifndef lint
00011 static const char revid[] = "$Id: os__dir_8c-source.html,v 1.1 2008年06月08日 10:21:07 sebdiaz Exp $";
00012 #endif /* not lint */
00013 
00014 #ifndef NO_SYSTEM_INCLUDES
00015 #include <sys/types.h>
00016 
00017 #if HAVE_DIRENT_H
00018 # include <dirent.h>
00019 # define NAMLEN(dirent) strlen((dirent)->d_name)
00020 #else
00021 # define dirent direct
00022 # define NAMLEN(dirent) (dirent)->d_namlen
00023 # if HAVE_SYS_NDIR_H
00024 # include <sys/ndir.h>
00025 # endif
00026 # if HAVE_SYS_DIR_H
00027 # include <sys/dir.h>
00028 # endif
00029 # if HAVE_NDIR_H
00030 # include <ndir.h>
00031 # endif
00032 #endif
00033 
00034 #endif
00035 
00036 #include "db_int.h"
00037 #include "os_jump.h"
00038 
00039 /*
00040  * CDB___os_dirlist --
00041  * Return a list of the files in a directory.
00042  *
00043  * PUBLIC: int CDB___os_dirlist __P((DB_ENV *, const char *, char ***, int *));
00044  */
00045 int
00046 CDB___os_dirlist(dbenv, dir, namesp, cntp)
00047 DB_ENV *dbenv;
00048 const char *dir;
00049 char ***namesp;
00050 int *cntp;
00051 {
00052 struct dirent *dp;
00053 DIR *dirp;
00054 int arraysz, cnt, ret;
00055 char **names;
00056 
00057 if (CDB___db_jump.j_dirlist != NULL)
00058 return (CDB___db_jump.j_dirlist(dir, namesp, cntp));
00059 
00060 if ((dirp = opendir(dir)) == NULL)
00061 return (CDB___os_get_errno());
00062 names = NULL;
00063 for (arraysz = cnt = 0; (dp = readdir(dirp)) != NULL; ++cnt) {
00064 if (cnt >= arraysz) {
00065 arraysz += 100;
00066 if ((ret = CDB___os_realloc(dbenv,
00067 arraysz * sizeof(names[0]), NULL, &names)) != 0)
00068 goto nomem;
00069 }
00070 if ((ret = CDB___os_strdup(dbenv, dp->d_name, &names[cnt])) != 0)
00071 goto nomem;
00072 }
00073 (void)closedir(dirp);
00074 
00075 *namesp = names;
00076 *cntp = cnt;
00077 return (0);
00078 
00079 nomem: if (names != NULL)
00080 CDB___os_dirfree(names, cnt);
00081 if (dirp != NULL)
00082 (void)closedir(dirp);
00083 return (ret);
00084 }
00085 
00086 /*
00087  * CDB___os_dirfree --
00088  * Free the list of files.
00089  *
00090  * PUBLIC: void CDB___os_dirfree __P((char **, int));
00091  */
00092 void
00093 CDB___os_dirfree(names, cnt)
00094 char **names;
00095 int cnt;
00096 {
00097 if (CDB___db_jump.j_dirfree != NULL)
00098 CDB___db_jump.j_dirfree(names, cnt);
00099 else {
00100 while (cnt > 0)
00101 CDB___os_free(names[--cnt], 0);
00102 CDB___os_free(names, 0);
00103 }
00104 }