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1 | /*- |
2 | * Copyright (c) 1982, 1988 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * %sccs.include.proprietary.c% | |
6 | * | |
38a01dbe | 7 | * @(#)write.c 7.2 (Berkeley) %G% |
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8 | */ |
9 | ||
10 | #include <sys/param.h> | |
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11 | |
12 | #include <stand/saio.h> | |
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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 |