1*7c478bd9Sstevel@tonic-gate /* 2*7c478bd9Sstevel@tonic-gate * Copyright (c) 2000-2001 Sendmail, Inc. and its suppliers. 3*7c478bd9Sstevel@tonic-gate * All rights reserved. 4*7c478bd9Sstevel@tonic-gate * Copyright (c) 1990, 1993 5*7c478bd9Sstevel@tonic-gate * The Regents of the University of California. All rights reserved. 6*7c478bd9Sstevel@tonic-gate * 7*7c478bd9Sstevel@tonic-gate * This code is derived from software contributed to Berkeley by 8*7c478bd9Sstevel@tonic-gate * Chris Torek. 9*7c478bd9Sstevel@tonic-gate * 10*7c478bd9Sstevel@tonic-gate * By using this file, you agree to the terms and conditions set 11*7c478bd9Sstevel@tonic-gate * forth in the LICENSE file which can be found at the top level of 12*7c478bd9Sstevel@tonic-gate * the sendmail distribution. 13*7c478bd9Sstevel@tonic-gate */ 14*7c478bd9Sstevel@tonic-gate 15*7c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 16*7c478bd9Sstevel@tonic-gate 17*7c478bd9Sstevel@tonic-gate #include <sm/gen.h> 18*7c478bd9Sstevel@tonic-gate SM_RCSID("@(#)$Id: fwrite.c,v 1.22 2001/04/03 01:46:40 ca Exp $") 19*7c478bd9Sstevel@tonic-gate #include <errno.h> 20*7c478bd9Sstevel@tonic-gate #include <sm/io.h> 21*7c478bd9Sstevel@tonic-gate #include <sm/assert.h> 22*7c478bd9Sstevel@tonic-gate #include "local.h" 23*7c478bd9Sstevel@tonic-gate #include "fvwrite.h" 24*7c478bd9Sstevel@tonic-gate 25*7c478bd9Sstevel@tonic-gate /* 26*7c478bd9Sstevel@tonic-gate ** SM_IO_WRITE -- write to a file pointer 27*7c478bd9Sstevel@tonic-gate ** 28*7c478bd9Sstevel@tonic-gate ** Parameters: 29*7c478bd9Sstevel@tonic-gate ** fp -- file pointer writing to 30*7c478bd9Sstevel@tonic-gate ** timeout -- time to complete the write 31*7c478bd9Sstevel@tonic-gate ** buf -- location of data to be written 32*7c478bd9Sstevel@tonic-gate ** size -- number of bytes to be written 33*7c478bd9Sstevel@tonic-gate ** 34*7c478bd9Sstevel@tonic-gate ** Result: 35*7c478bd9Sstevel@tonic-gate ** Failure: returns 0 _and_ sets errno 36*7c478bd9Sstevel@tonic-gate ** Success: returns >=0 with errno unchanged, where the 37*7c478bd9Sstevel@tonic-gate ** number returned is the number of bytes written. 38*7c478bd9Sstevel@tonic-gate */ 39*7c478bd9Sstevel@tonic-gate 40*7c478bd9Sstevel@tonic-gate size_t 41*7c478bd9Sstevel@tonic-gate sm_io_write(fp, timeout, buf, size) 42*7c478bd9Sstevel@tonic-gate SM_FILE_T *fp; 43*7c478bd9Sstevel@tonic-gate int timeout; 44*7c478bd9Sstevel@tonic-gate const void *buf; 45*7c478bd9Sstevel@tonic-gate size_t size; 46*7c478bd9Sstevel@tonic-gate { 47*7c478bd9Sstevel@tonic-gate struct sm_uio uio; 48*7c478bd9Sstevel@tonic-gate struct sm_iov iov; 49*7c478bd9Sstevel@tonic-gate 50*7c478bd9Sstevel@tonic-gate SM_REQUIRE_ISA(fp, SmFileMagic); 51*7c478bd9Sstevel@tonic-gate 52*7c478bd9Sstevel@tonic-gate if (fp->f_write == NULL) 53*7c478bd9Sstevel@tonic-gate { 54*7c478bd9Sstevel@tonic-gate errno = ENODEV; 55*7c478bd9Sstevel@tonic-gate return 0; 56*7c478bd9Sstevel@tonic-gate } 57*7c478bd9Sstevel@tonic-gate 58*7c478bd9Sstevel@tonic-gate iov.iov_base = (void *) buf; 59*7c478bd9Sstevel@tonic-gate uio.uio_resid = iov.iov_len = size; 60*7c478bd9Sstevel@tonic-gate uio.uio_iov = &iov; 61*7c478bd9Sstevel@tonic-gate uio.uio_iovcnt = 1; 62*7c478bd9Sstevel@tonic-gate 63*7c478bd9Sstevel@tonic-gate /* The usual case is success (sm_fvwrite returns 0) */ 64*7c478bd9Sstevel@tonic-gate if (sm_fvwrite(fp, timeout, &uio) == 0) 65*7c478bd9Sstevel@tonic-gate return size; 66*7c478bd9Sstevel@tonic-gate 67*7c478bd9Sstevel@tonic-gate /* else return number of bytes actually written */ 68*7c478bd9Sstevel@tonic-gate return size - uio.uio_resid; 69*7c478bd9Sstevel@tonic-gate } 70