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Diffstat (limited to 'contrib/sendmail/libsm/fpurge.c')
-rw-r--r-- | contrib/sendmail/libsm/fpurge.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/contrib/sendmail/libsm/fpurge.c b/contrib/sendmail/libsm/fpurge.c new file mode 100644 index 0000000..4e6fd5a --- /dev/null +++ b/contrib/sendmail/libsm/fpurge.c @@ -0,0 +1,53 @@ +/* + * Copyright (c) 2000-2001 Sendmail, Inc. and its suppliers. + * All rights reserved. + * Copyright (c) 1990, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Chris Torek. + * + * By using this file, you agree to the terms and conditions set + * forth in the LICENSE file which can be found at the top level of + * the sendmail distribution. + */ + +#include <sm/gen.h> +SM_RCSID("@(#)$Id: fpurge.c,v 1.20 2001/09/11 04:04:48 gshapiro Exp $") +#include <stdlib.h> +#include <errno.h> +#include <sm/io.h> +#include <sm/assert.h> +#include "local.h" + +/* +** SM_IO_PURGE -- purge/empty the buffer without committing buffer content +** +** Parameters: +** fp -- file pointer to purge +** +** Returns: +** Failure: returns SM_IO_EOF and sets errno +** Success: returns 0 (zero) +*/ + +int +sm_io_purge(fp) + register SM_FILE_T *fp; +{ + SM_REQUIRE_ISA(fp, SmFileMagic); + if (!fp->f_flags) + { + errno = EBADF; + return SM_IO_EOF; + } + + if (HASUB(fp)) + FREEUB(fp); + fp->f_p = fp->f_bf.smb_base; + fp->f_r = 0; + + /* implies SMFBF */ + fp->f_w = fp->f_flags & (SMLBF|SMNBF) ? 0 : fp->f_bf.smb_size; + return 0; +} |