diff options
Diffstat (limited to 'contrib/sendmail/libsm/setvbuf.c')
| -rw-r--r-- | contrib/sendmail/libsm/setvbuf.c | 190 |
1 files changed, 0 insertions, 190 deletions
diff --git a/contrib/sendmail/libsm/setvbuf.c b/contrib/sendmail/libsm/setvbuf.c deleted file mode 100644 index 172a767b8535..000000000000 --- a/contrib/sendmail/libsm/setvbuf.c +++ /dev/null @@ -1,190 +0,0 @@ -/* - * 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: setvbuf.c,v 1.32 2001/09/11 04:04:49 gshapiro Exp $") -#include <stdlib.h> -#include <errno.h> -#include <fcntl.h> -#include <sm/io.h> -#include <sm/heap.h> -#include <sm/assert.h> -#include <sm/conf.h> -#include "local.h" - -/* -** SM_IO_SETVBUF -- set the buffering type for a file -** -** Set one of the different kinds of buffering, optionally including -** a buffer. -** If 'size' is == 0 then an "optimal" size will be selected. -** If 'buf' is == NULL then space will be allocated at 'size'. -** -** Parameters: -** fp -- the file that buffering is to be changed for -** timeout -- time allowed for completing the function -** buf -- buffer to use -** mode -- buffering method to use -** size -- size of 'buf' -** -** Returns: -** Failure: SM_IO_EOF -** Success: 0 (zero) -*/ - -int -sm_io_setvbuf(fp, timeout, buf, mode, size) - SM_FILE_T *fp; - int timeout; - char *buf; - int mode; - size_t size; -{ - int ret, flags; - size_t iosize; - int ttyflag; - int fd; - struct timeval to; - - SM_REQUIRE_ISA(fp, SmFileMagic); - - /* - ** Verify arguments. The `int' limit on `size' is due to this - ** particular implementation. Note, buf and size are ignored - ** when setting SM_IO_NBF. - */ - - if (mode != SM_IO_NBF) - if ((mode != SM_IO_FBF && mode != SM_IO_LBF && - mode != SM_IO_NOW) || (int) size < 0) - return SM_IO_EOF; - - /* - ** Write current buffer, if any. Discard unread input (including - ** ungetc data), cancel line buffering, and free old buffer if - ** malloc()ed. We also clear any eof condition, as if this were - ** a seek. - */ - - ret = 0; - SM_CONVERT_TIME(fp, fd, timeout, &to); - (void) sm_flush(fp, &timeout); - if (HASUB(fp)) - FREEUB(fp); - fp->f_r = fp->f_lbfsize = 0; - flags = fp->f_flags; - if (flags & SMMBF) - { - sm_free((void *) fp->f_bf.smb_base); - fp->f_bf.smb_base = NULL; - } - flags &= ~(SMLBF | SMNBF | SMMBF | SMOPT | SMNPT | SMFEOF | SMNOW | - SMFBF); - - /* If setting unbuffered mode, skip all the hard work. */ - if (mode == SM_IO_NBF) - goto nbf; - - /* - ** Find optimal I/O size for seek optimization. This also returns - ** a `tty flag' to suggest that we check isatty(fd), but we do not - ** care since our caller told us how to buffer. - */ - - flags |= sm_whatbuf(fp, &iosize, &ttyflag); - if (size == 0) - { - buf = NULL; /* force local allocation */ - size = iosize; - } - - /* Allocate buffer if needed. */ - if (buf == NULL) - { - if ((buf = sm_malloc(size)) == NULL) - { - /* - ** Unable to honor user's request. We will return - ** failure, but try again with file system size. - */ - - ret = SM_IO_EOF; - if (size != iosize) - { - size = iosize; - buf = sm_malloc(size); - } - } - if (buf == NULL) - { - /* No luck; switch to unbuffered I/O. */ -nbf: - fp->f_flags = flags | SMNBF; - fp->f_w = 0; - fp->f_bf.smb_base = fp->f_p = fp->f_nbuf; - fp->f_bf.smb_size = 1; - return ret; - } - flags |= SMMBF; - } - - /* - ** Kill any seek optimization if the buffer is not the - ** right size. - ** - ** SHOULD WE ALLOW MULTIPLES HERE (i.e., ok iff (size % iosize) == 0)? - */ - - if (size != iosize) - flags |= SMNPT; - - /* - ** Fix up the SM_FILE_T fields, and set sm_cleanup for output flush on - ** exit (since we are buffered in some way). - */ - - if (mode == SM_IO_LBF) - flags |= SMLBF; - else if (mode == SM_IO_NOW) - flags |= SMNOW; - else if (mode == SM_IO_FBF) - flags |= SMFBF; - fp->f_flags = flags; - fp->f_bf.smb_base = fp->f_p = (unsigned char *)buf; - fp->f_bf.smb_size = size; - /* fp->f_lbfsize is still 0 */ - if (flags & SMWR) - { - /* - ** Begin or continue writing: see sm_wsetup(). Note - ** that SMNBF is impossible (it was handled earlier). - */ - - if (flags & SMLBF) - { - fp->f_w = 0; - fp->f_lbfsize = -fp->f_bf.smb_size; - } - else - fp->f_w = size; - } - else - { - /* begin/continue reading, or stay in intermediate state */ - fp->f_w = 0; - } - - atexit(sm_cleanup); - return ret; -} |