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bb0cfa24 | 1 | /* |
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2 | * Copyright (c) 1988 Regents of the University of California. |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms are permitted | |
6 | * provided that the above copyright notice and this paragraph are | |
7 | * duplicated in all such forms and that any documentation, | |
8 | * advertising materials, and other materials related to such | |
9 | * distribution and use acknowledge that the software was developed | |
10 | * by the University of California, Berkeley. The name of the | |
11 | * University may not be used to endorse or promote products derived | |
12 | * from this software without specific prior written permission. | |
13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
15 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
bb0cfa24 DF |
16 | */ |
17 | ||
2ce81398 | 18 | #if defined(LIBC_SCCS) && !defined(lint) |
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19 | static char sccsid[] = "@(#)perror.c 5.4 (Berkeley) %G%"; |
20 | #endif /* LIBC_SCCS and not lint */ | |
bb0cfa24 | 21 | |
df5b5637 SL |
22 | #include <sys/types.h> |
23 | #include <sys/uio.h> | |
716337de BJ |
24 | |
25 | int errno; | |
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26 | extern int sys_nerr; |
27 | extern char *sys_errlist[]; | |
716337de | 28 | perror(s) |
df5b5637 | 29 | char *s; |
716337de | 30 | { |
df5b5637 SL |
31 | struct iovec iov[4]; |
32 | register struct iovec *v = iov; | |
716337de | 33 | |
df5b5637 SL |
34 | if (s && *s) { |
35 | v->iov_base = s; | |
36 | v->iov_len = strlen(s); | |
37 | v++; | |
38 | v->iov_base = ": "; | |
39 | v->iov_len = 2; | |
40 | v++; | |
716337de | 41 | } |
df5b5637 SL |
42 | v->iov_base = errno < sys_nerr ? sys_errlist[errno] : "Unknown error"; |
43 | v->iov_len = strlen(v->iov_base); | |
44 | v++; | |
45 | v->iov_base = "\n"; | |
46 | v->iov_len = 1; | |
74e67efa | 47 | (void)writev(2, iov, (v - iov) + 1); |
716337de | 48 | } |