diff options
Diffstat (limited to 'imap/src/osdep/unix/opendir.c')
-rw-r--r-- | imap/src/osdep/unix/opendir.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/imap/src/osdep/unix/opendir.c b/imap/src/osdep/unix/opendir.c new file mode 100644 index 00000000..445fd148 --- /dev/null +++ b/imap/src/osdep/unix/opendir.c @@ -0,0 +1,79 @@ +/* ======================================================================== + * Copyright 1988-2006 University of Washington + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * + * ======================================================================== + */ + +/* + * Program: Read directories + * + * Author: Mark Crispin + * Networks and Distributed Computing + * Computing & Communications + * University of Washington + * Administration Building, AG-44 + * Seattle, WA 98195 + * Internet: MRC@CAC.Washington.EDU + * + * Date: 16 December 1993 + * Last Edited: 30 August 2006 + */ + +/* Emulator for BSD opendir() call + * Accepts: directory name + * Returns: directory structure pointer + */ + +DIR *opendir (char *name) +{ + DIR *d = NIL; + struct stat sbuf; + int fd = open (name,O_RDONLY,NIL); + errno = ENOTDIR; /* default error is bogus directory */ + if ((fd >= 0) && !(fstat (fd,&sbuf)) && ((sbuf.st_mode&S_IFMT) == S_IFDIR)) { + d = (DIR *) fs_get (sizeof (DIR)); + /* initialize structure */ + d->dd_loc = 0; + read (fd,d->dd_buf = (char *) fs_get (sbuf.st_size), + d->dd_size = sbuf.st_size); + } + else if (d) fs_give ((void **) &d); + if (fd >= 0) close (fd); + return d; +} + + +/* Emulator for BSD closedir() call + * Accepts: directory structure pointer + */ + +int closedir (DIR *d) +{ + /* free storage */ + fs_give ((void **) &(d->dd_buf)); + fs_give ((void **) &d); + return NIL; /* return */ +} + + +/* Emulator for BSD readdir() call + * Accepts: directory structure pointer + */ + +struct direct *readdir (DIR *d) +{ + /* loop through directory */ + while (d->dd_loc < d->dd_size) { + struct direct *dp = (struct direct *) (d->dd_buf + d->dd_loc); + d->dd_loc += sizeof (struct direct); + if (dp->d_ino) return dp; /* if have a good entry return it */ + } + return NIL; /* all done */ +} |