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/* $OpenBSD: pw_dup.c,v 1.2 2002/04/29 18:43:08 millert Exp $ */
/*
* Copyright (c) 2000,2002 Todd C. Miller <Todd.Miller@courtesan.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char rcsid[] = "$OpenBSD: pw_dup.c,v 1.2 2002/04/29 18:43:08 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);
}
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