1 /*- 2 * Copyright (c) 1982, 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.proprietary.c% 6 * 7 * @(#)write.c 8.1 (Berkeley) 06/11/93 8 */ 9 10 #include <sys/param.h> 11 12 #include <stand.att/saio.h> 13 14 #ifndef SMALL 15 write(fdesc, buf, count) 16 int fdesc, count; 17 char *buf; 18 { 19 register i; 20 register struct iob *file; 21 22 errno = 0; 23 if (fdesc >= 0 && fdesc <= 2) { 24 i = count; 25 while (i--) 26 putchar(*buf++); 27 return (count); 28 } 29 fdesc -= 3; 30 if (fdesc < 0 || fdesc >= SOPEN_MAX || 31 ((file = &iob[fdesc])->i_flgs&F_ALLOC) == 0) { 32 errno = EBADF; 33 return (-1); 34 } 35 if ((file->i_flgs&F_WRITE) == 0) { 36 errno = EBADF; 37 return (-1); 38 } 39 file->i_cc = count; 40 file->i_ma = buf; 41 file->i_bn = file->i_boff + (file->i_offset / DEV_BSIZE); 42 i = devwrite(file); 43 file->i_offset += count; 44 if (i < 0) 45 errno = file->i_error; 46 return (i); 47 } 48 #endif 49