
Samba is starting to protect against bi-di attacks and the starting point is to require that input files be fully UTF-8. In 2021 this is a reasonable starting point anyway. Signed-off-by: Andrew Bartlett <abartlet@samba.org>
207 lines
5.0 KiB
C
207 lines
5.0 KiB
C
/*
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* Copyright (c) 2009 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Portions Copyright (c) 2009 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "hi_locl.h"
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#ifdef HAVE_GCD
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#include <dispatch/dispatch.h>
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#else
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#include "heim_threads.h"
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#endif
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struct heim_icred {
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uid_t uid;
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gid_t gid;
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pid_t pid;
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pid_t session;
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};
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void
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heim_ipc_free_cred(heim_icred cred)
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{
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free(cred);
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}
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uid_t
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heim_ipc_cred_get_uid(heim_icred cred)
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{
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return cred ? cred->uid : (uid_t)-1;
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}
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gid_t
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heim_ipc_cred_get_gid(heim_icred cred)
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{
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return cred ? cred->gid : (gid_t)-1;
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}
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pid_t
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heim_ipc_cred_get_pid(heim_icred cred)
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{
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return cred ? cred->pid : (pid_t)0;
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}
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pid_t
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heim_ipc_cred_get_session(heim_icred cred)
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{
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return cred ? cred->session : (pid_t)-1;
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}
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int
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_heim_ipc_create_cred(uid_t uid, gid_t gid, pid_t pid, pid_t session, heim_icred *cred)
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{
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*cred = calloc(1, sizeof(**cred));
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if (*cred == NULL)
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return ENOMEM;
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(*cred)->uid = uid;
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(*cred)->gid = gid;
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(*cred)->pid = pid;
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(*cred)->session = session;
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return 0;
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}
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#ifndef HAVE_GCD
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struct heim_isemaphore {
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HEIMDAL_MUTEX mutex;
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#ifdef ENABLE_PTHREAD_SUPPORT
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pthread_cond_t cond;
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#endif
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long counter;
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};
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#endif
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heim_isemaphore
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heim_ipc_semaphore_create(long value)
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{
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#ifdef HAVE_GCD
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return (heim_isemaphore)dispatch_semaphore_create(value);
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#elif !defined(ENABLE_PTHREAD_SUPPORT)
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heim_assert(0, "no semaphore support w/o pthreads");
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return NULL;
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#else
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heim_isemaphore s = malloc(sizeof(*s));
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if (s == NULL)
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return NULL;
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HEIMDAL_MUTEX_init(&s->mutex);
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pthread_cond_init(&s->cond, NULL);
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s->counter = value;
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return s;
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#endif
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}
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long
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heim_ipc_semaphore_wait(heim_isemaphore s, time_t t)
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{
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#ifdef HAVE_GCD
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uint64_t timeout;
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if (t == HEIM_IPC_WAIT_FOREVER)
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timeout = DISPATCH_TIME_FOREVER;
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else
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timeout = (uint64_t)t * NSEC_PER_SEC;
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return dispatch_semaphore_wait((dispatch_semaphore_t)s, timeout);
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#elif !defined(ENABLE_PTHREAD_SUPPORT)
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heim_assert(0, "no semaphore support w/o pthreads");
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return 0;
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#else
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HEIMDAL_MUTEX_lock(&s->mutex);
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/* if counter hits below zero, we get to wait */
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if (--s->counter < 0) {
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int ret;
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if (t == HEIM_IPC_WAIT_FOREVER)
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ret = pthread_cond_wait(&s->cond, &s->mutex);
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else {
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struct timespec ts;
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ts.tv_sec = t;
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ts.tv_nsec = 0;
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ret = pthread_cond_timedwait(&s->cond, &s->mutex, &ts);
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}
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if (ret) {
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HEIMDAL_MUTEX_unlock(&s->mutex);
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return errno;
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}
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}
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HEIMDAL_MUTEX_unlock(&s->mutex);
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return 0;
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#endif
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}
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long
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heim_ipc_semaphore_signal(heim_isemaphore s)
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{
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#ifdef HAVE_GCD
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return dispatch_semaphore_signal((dispatch_semaphore_t)s);
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#elif !defined(ENABLE_PTHREAD_SUPPORT)
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heim_assert(0, "no semaphore support w/o pthreads");
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return EINVAL;
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#else
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int wakeup;
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HEIMDAL_MUTEX_lock(&s->mutex);
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wakeup = (++s->counter == 0) ;
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HEIMDAL_MUTEX_unlock(&s->mutex);
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if (wakeup)
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pthread_cond_signal(&s->cond);
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return 0;
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#endif
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}
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void
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heim_ipc_semaphore_release(heim_isemaphore s)
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{
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#ifdef HAVE_GCD
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dispatch_release((dispatch_semaphore_t)s);
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#elif !defined(ENABLE_PTHREAD_SUPPORT)
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heim_assert(0, "no semaphore support w/o pthreads");
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#else
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HEIMDAL_MUTEX_lock(&s->mutex);
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if (s->counter != 0)
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abort();
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HEIMDAL_MUTEX_unlock(&s->mutex);
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HEIMDAL_MUTEX_destroy(&s->mutex);
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pthread_cond_destroy(&s->cond);
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free(s);
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#endif
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}
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void
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heim_ipc_free_data(heim_idata *data)
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{
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if (data->data)
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free(data->data);
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data->data = NULL;
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data->length = 0;
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}
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