mirror of
https://github.com/samba-team/samba.git
synced 2024-12-28 07:21:54 +03:00
9836af7cd6
fixed tdbsam memory corruption (and segfault) reducing calls to pdb_uid_to_user_rid and countrary to 0 to move to a non alghoritmic rid allocation with some passdb modules.
134 lines
3.0 KiB
C
134 lines
3.0 KiB
C
/*
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Unix SMB/CIFS implementation.
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Safe versions of getpw* calls
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Copyright (C) Andrew Bartlett 2002
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "includes.h"
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struct passwd *make_modifyable_passwd(const struct passwd *from)
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{
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struct passwd *ret = smb_xmalloc(sizeof(*ret));
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/* This is the assumed shape of the members by certain parts of the code...
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fstring pw_name;
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fstring pw_passwd;
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fstring pw_gecos;
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pstring pw_dir;
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pstring pw_shell;
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*/
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char *pw_name = smb_xmalloc(sizeof(fstring));
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char *pw_passwd = smb_xmalloc(sizeof(fstring));
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char *pw_gecos = smb_xmalloc(sizeof(fstring));
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char *pw_dir = smb_xmalloc(sizeof(pstring));
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char *pw_shell = smb_xmalloc(sizeof(pstring));
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ZERO_STRUCTP(ret);
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/*
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* Now point the struct's members as the
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* newly allocated buffers:
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*/
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ret->pw_name = pw_name;
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fstrcpy(ret->pw_name, from->pw_name);
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ret->pw_passwd = pw_passwd;
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fstrcpy(ret->pw_passwd, from->pw_passwd);
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ret->pw_uid = from->pw_uid;
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ret->pw_gid = from->pw_gid;
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ret->pw_gecos = pw_gecos;
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fstrcpy(ret->pw_gecos, from->pw_gecos);
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ret->pw_dir = pw_dir;
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pstrcpy(ret->pw_dir, from->pw_dir);
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ret->pw_shell = pw_shell;
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pstrcpy(ret->pw_shell, from->pw_shell);
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return ret;
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}
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static struct passwd *alloc_copy_passwd(const struct passwd *from)
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{
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struct passwd *ret = smb_xmalloc(sizeof(struct passwd));
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ZERO_STRUCTP(ret);
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ret->pw_name = smb_xstrdup(from->pw_name);
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ret->pw_passwd = smb_xstrdup(from->pw_passwd);
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ret->pw_uid = from->pw_uid;
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ret->pw_gid = from->pw_gid;
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ret->pw_gecos = smb_xstrdup(from->pw_gecos);
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ret->pw_dir = smb_xstrdup(from->pw_dir);
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ret->pw_shell = smb_xstrdup(from->pw_shell);
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return ret;
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}
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void passwd_free (struct passwd **buf)
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{
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if (!*buf) {
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DEBUG(0, ("attempted double-free of allocated passwd\n"));
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return;
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}
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SAFE_FREE((*buf)->pw_name);
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SAFE_FREE((*buf)->pw_passwd);
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SAFE_FREE((*buf)->pw_gecos);
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SAFE_FREE((*buf)->pw_dir);
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SAFE_FREE((*buf)->pw_shell);
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SAFE_FREE(*buf);
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}
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struct passwd *getpwnam_alloc(const char *name)
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{
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struct passwd *temp;
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temp = getpwnam(name);
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if (!temp) {
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#if 0
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if (errno == ENOMEM) {
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/* what now? */
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}
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#endif
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return NULL;
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}
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return alloc_copy_passwd(temp);
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}
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struct passwd *getpwuid_alloc(uid_t uid)
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{
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struct passwd *temp;
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temp = getpwuid(uid);
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if (!temp) {
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#if 0
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if (errno == ENOMEM) {
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/* what now? */
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}
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#endif
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return NULL;
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}
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return alloc_copy_passwd(temp);
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}
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