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Diffstat (limited to 'openbsd-compat/strlcpy.c')
-rw-r--r-- | openbsd-compat/strlcpy.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/openbsd-compat/strlcpy.c b/openbsd-compat/strlcpy.c new file mode 100644 index 000000000..276c25c37 --- /dev/null +++ b/openbsd-compat/strlcpy.c | |||
@@ -0,0 +1,73 @@ | |||
1 | /* $OpenBSD: strlcpy.c,v 1.4 1999/05/01 18:56:41 millert Exp $ */ | ||
2 | |||
3 | /* | ||
4 | * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com> | ||
5 | * All rights reserved. | ||
6 | * | ||
7 | * Redistribution and use in source and binary forms, with or without | ||
8 | * modification, are permitted provided that the following conditions | ||
9 | * are met: | ||
10 | * 1. Redistributions of source code must retain the above copyright | ||
11 | * notice, this list of conditions and the following disclaimer. | ||
12 | * 2. Redistributions in binary form must reproduce the above copyright | ||
13 | * notice, this list of conditions and the following disclaimer in the | ||
14 | * documentation and/or other materials provided with the distribution. | ||
15 | * 3. The name of the author may not be used to endorse or promote products | ||
16 | * derived from this software without specific prior written permission. | ||
17 | * | ||
18 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, | ||
19 | * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY | ||
20 | * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL | ||
21 | * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | ||
22 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | ||
23 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; | ||
24 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, | ||
25 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR | ||
26 | * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF | ||
27 | * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
28 | */ | ||
29 | |||
30 | #include "config.h" | ||
31 | #ifndef HAVE_STRLCPY | ||
32 | |||
33 | #if defined(LIBC_SCCS) && !defined(lint) | ||
34 | static char *rcsid = "$OpenBSD: strlcpy.c,v 1.4 1999/05/01 18:56:41 millert Exp $"; | ||
35 | #endif /* LIBC_SCCS and not lint */ | ||
36 | |||
37 | #include <sys/types.h> | ||
38 | #include <string.h> | ||
39 | |||
40 | /* | ||
41 | * Copy src to string dst of size siz. At most siz-1 characters | ||
42 | * will be copied. Always NUL terminates (unless siz == 0). | ||
43 | * Returns strlen(src); if retval >= siz, truncation occurred. | ||
44 | */ | ||
45 | size_t strlcpy(dst, src, siz) | ||
46 | char *dst; | ||
47 | const char *src; | ||
48 | size_t siz; | ||
49 | { | ||
50 | register char *d = dst; | ||
51 | register const char *s = src; | ||
52 | register size_t n = siz; | ||
53 | |||
54 | /* Copy as many bytes as will fit */ | ||
55 | if (n != 0 && --n != 0) { | ||
56 | do { | ||
57 | if ((*d++ = *s++) == 0) | ||
58 | break; | ||
59 | } while (--n != 0); | ||
60 | } | ||
61 | |||
62 | /* Not enough room in dst, add NUL and traverse rest of src */ | ||
63 | if (n == 0) { | ||
64 | if (siz != 0) | ||
65 | *d = '\0'; /* NUL-terminate dst */ | ||
66 | while (*s++) | ||
67 | ; | ||
68 | } | ||
69 | |||
70 | return(s - src - 1); /* count does not include NUL */ | ||
71 | } | ||
72 | |||
73 | #endif /* !HAVE_STRLCPY */ | ||