projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| b0e33720 KB |
1 | /*- |
| 2 | * Copyright (c) 1982, 1988 The Regents of the University of California. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * %sccs.include.proprietary.c% | |
| 6 | * | |
| 7 | * @(#)write.c 7.1 (Berkeley) %G% | |
| 8 | */ | |
| 9 | ||
| 10 | #include <sys/param.h> | |
| 11 | #include "saio.h" | |
| 12 | ||
| 13 | #ifndef SMALL | |
| 14 | write(fdesc, buf, count) | |
| 15 | int fdesc, count; | |
| 16 | char *buf; | |
| 17 | { | |
| 18 | register i; | |
| 19 | register struct iob *file; | |
| 20 | ||
| 21 | errno = 0; | |
| 22 | if (fdesc >= 0 && fdesc <= 2) { | |
| 23 | i = count; | |
| 24 | while (i--) | |
| 25 | putchar(*buf++); | |
| 26 | return (count); | |
| 27 | } | |
| 28 | fdesc -= 3; | |
| 29 | if (fdesc < 0 || fdesc >= SOPEN_MAX || | |
| 30 | ((file = &iob[fdesc])->i_flgs&F_ALLOC) == 0) { | |
| 31 | errno = EBADF; | |
| 32 | return (-1); | |
| 33 | } | |
| 34 | if ((file->i_flgs&F_WRITE) == 0) { | |
| 35 | errno = EBADF; | |
| 36 | return (-1); | |
| 37 | } | |
| 38 | file->i_cc = count; | |
| 39 | file->i_ma = buf; | |
| 40 | file->i_bn = file->i_boff + (file->i_offset / DEV_BSIZE); | |
| 41 | i = devwrite(file); | |
| 42 | file->i_offset += count; | |
| 43 | if (i < 0) | |
| 44 | errno = file->i_error; | |
| 45 | return (i); | |
| 46 | } | |
| 47 | #endif |