1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
/* $OpenBSD: pw_dup.c,v 1.4 2003/06/03 01:52:39 millert Exp $ */
/*
* Copyright (c) 2000, 2002 Todd C. Miller <Todd.Miller@courtesan.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND TODD C. MILLER DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL TODD C. MILLER BE LIABLE
* FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static const char rcsid[] = "$OpenBSD: pw_dup.c,v 1.4 2003/06/03 01:52:39 millert Exp $";
#endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
#include <pwd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
struct passwd *
pw_dup(const struct passwd *pw)
{
char *cp;
size_t nsize, psize, csize, gsize, dsize, ssize, total;
struct passwd *newpw;
/* Allocate in one big chunk for easy freeing */
total = sizeof(struct passwd);
if (pw->pw_name) {
nsize = strlen(pw->pw_name) + 1;
total += nsize;
}
if (pw->pw_passwd) {
psize = strlen(pw->pw_passwd) + 1;
total += psize;
}
if (pw->pw_class) {
csize = strlen(pw->pw_class) + 1;
total += csize;
}
if (pw->pw_gecos) {
gsize = strlen(pw->pw_gecos) + 1;
total += gsize;
}
if (pw->pw_dir) {
dsize = strlen(pw->pw_dir) + 1;
total += dsize;
}
if (pw->pw_shell) {
ssize = strlen(pw->pw_shell) + 1;
total += ssize;
}
if ((cp = malloc(total)) == NULL)
return (NULL);
newpw = (struct passwd *)cp;
/*
* Copy in passwd contents and make strings relative to space
* at the end of the buffer.
*/
(void)memcpy(newpw, pw, sizeof(struct passwd));
cp += sizeof(struct passwd);
if (pw->pw_name) {
(void)memcpy(cp, pw->pw_name, nsize);
newpw->pw_name = cp;
cp += nsize;
}
if (pw->pw_passwd) {
(void)memcpy(cp, pw->pw_passwd, psize);
newpw->pw_passwd = cp;
cp += psize;
}
if (pw->pw_class) {
(void)memcpy(cp, pw->pw_class, csize);
newpw->pw_class = cp;
cp += csize;
}
if (pw->pw_gecos) {
(void)memcpy(cp, pw->pw_gecos, gsize);
newpw->pw_gecos = cp;
cp += gsize;
}
if (pw->pw_dir) {
(void)memcpy(cp, pw->pw_dir, dsize);
newpw->pw_dir = cp;
cp += dsize;
}
if (pw->pw_shell) {
(void)memcpy(cp, pw->pw_shell, ssize);
newpw->pw_shell = cp;
cp += ssize;
}
return (newpw);
}
|
