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/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000 The Apache Software Foundation. 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 end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
#include "threadproc.h"
#include "apr_strings.h"
#include "apr_portable.h"
apr_status_t apr_createprocattr_init(apr_procattr_t **new, apr_pool_t *cont)
{
(*new) = (apr_procattr_t *)apr_pcalloc(cont, sizeof(apr_procattr_t));
if ((*new) == NULL) {
return APR_ENOMEM;
}
(*new)->cntxt = cont;
(*new)->cmdtype = APR_PROGRAM;
return APR_SUCCESS;
}
apr_status_t apr_setprocattr_io(apr_procattr_t *attr, apr_int32_t in,
apr_int32_t out, apr_int32_t err)
{
apr_status_t status;
if (in != 0) {
if ((status = apr_create_pipe(&attr->child_in, &attr->parent_in,
attr->cntxt)) != APR_SUCCESS) {
return status;
}
switch (in) {
case APR_FULL_BLOCK:
break;
case APR_PARENT_BLOCK:
apr_set_pipe_timeout(attr->child_in, 0);
break;
case APR_CHILD_BLOCK:
apr_set_pipe_timeout(attr->parent_in, 0);
break;
default:
apr_set_pipe_timeout(attr->child_in, 0);
apr_set_pipe_timeout(attr->parent_in, 0);
}
}
if (out) {
if ((status = apr_create_pipe(&attr->parent_out, &attr->child_out,
attr->cntxt)) != APR_SUCCESS) {
return status;
}
switch (out) {
case APR_FULL_BLOCK:
break;
case APR_PARENT_BLOCK:
apr_set_pipe_timeout(attr->child_out, 0);
break;
case APR_CHILD_BLOCK:
apr_set_pipe_timeout(attr->parent_out, 0);
break;
default:
apr_set_pipe_timeout(attr->child_out, 0);
apr_set_pipe_timeout(attr->parent_out, 0);
}
}
if (err) {
if ((status = apr_create_pipe(&attr->parent_err, &attr->child_err,
attr->cntxt)) != APR_SUCCESS) {
return status;
}
switch (err) {
case APR_FULL_BLOCK:
break;
case APR_PARENT_BLOCK:
apr_set_pipe_timeout(attr->child_err, 0);
break;
case APR_CHILD_BLOCK:
apr_set_pipe_timeout(attr->parent_err, 0);
break;
default:
apr_set_pipe_timeout(attr->child_err, 0);
apr_set_pipe_timeout(attr->parent_err, 0);
}
}
return APR_SUCCESS;
}
apr_status_t apr_setprocattr_childin(apr_procattr_t *attr, apr_file_t *child_in,
apr_file_t *parent_in)
{
if (attr->child_in == NULL && attr->parent_in == NULL)
apr_create_pipe(&attr->child_in, &attr->parent_in, attr->cntxt);
if (child_in != NULL)
apr_dupfile(&attr->child_in, child_in, attr->cntxt);
if (parent_in != NULL)
apr_dupfile(&attr->parent_in, parent_in, attr->cntxt);
return APR_SUCCESS;
}
apr_status_t apr_setprocattr_childout(apr_procattr_t *attr, apr_file_t *child_out,
apr_file_t *parent_out)
{
if (attr->child_out == NULL && attr->parent_out == NULL)
apr_create_pipe(&attr->child_out, &attr->parent_out, attr->cntxt);
if (child_out != NULL)
apr_dupfile(&attr->child_out, child_out, attr->cntxt);
if (parent_out != NULL)
apr_dupfile(&attr->parent_out, parent_out, attr->cntxt);
return APR_SUCCESS;
}
apr_status_t apr_setprocattr_childerr(apr_procattr_t *attr, apr_file_t *child_err,
apr_file_t *parent_err)
{
if (attr->child_err == NULL && attr->parent_err == NULL)
apr_create_pipe(&attr->child_err, &attr->parent_err, attr->cntxt);
if (child_err != NULL)
apr_dupfile(&attr->child_err, child_err, attr->cntxt);
if (parent_err != NULL)
apr_dupfile(&attr->parent_err, parent_err, attr->cntxt);
return APR_SUCCESS;
}
apr_status_t apr_setprocattr_dir(apr_procattr_t *attr,
const char *dir)
{
attr->currdir = apr_pstrdup(attr->cntxt, dir);
if (attr->currdir) {
return APR_SUCCESS;
}
return APR_ENOMEM;
}
apr_status_t apr_setprocattr_cmdtype(apr_procattr_t *attr,
apr_cmdtype_e cmd)
{
attr->cmdtype = cmd;
return APR_SUCCESS;
}
apr_status_t apr_setprocattr_detach(apr_procattr_t *attr, apr_int32_t detach)
{
attr->detached = detach;
return APR_SUCCESS;
}
apr_status_t apr_fork(apr_proc_t *proc, apr_pool_t *cont)
{
int pid;
if ((pid = fork()) < 0) {
return errno;
}
else if (pid == 0) {
proc->pid = pid;
proc->in = NULL;
proc->out = NULL;
proc->err = NULL;
return APR_INCHILD;
}
proc->pid = pid;
proc->in = NULL;
proc->out = NULL;
proc->err = NULL;
return APR_INPARENT;
}
#if APR_HAVE_STRUCT_RLIMIT
#if defined(RLIMIT_CPU) || defined(RLIMIT_NPROC) || defined(RLIMIT_AS) || defined(RLIMIT_DATA) || defined(RLIMIT_VMEM)
static apr_status_t limit_proc(apr_procattr_t *attr)
{
#ifdef RLIMIT_CPU
if (attr->limit_cpu != NULL) {
if ((setrlimit(RLIMIT_CPU, attr->limit_cpu)) != 0) {
return errno;
}
}
#endif
#ifdef RLIMIT_NPROC
if (attr->limit_nproc != NULL) {
if ((setrlimit(RLIMIT_NPROC, attr->limit_nproc)) != 0) {
return errno;
}
}
#endif
#if defined(RLIMIT_AS)
if (attr->limit_mem != NULL) {
if ((setrlimit(RLIMIT_AS, attr->limit_mem)) != 0) {
return errno;
}
}
#elif defined(RLIMIT_DATA)
if (attr->limit_mem != NULL) {
if ((setrlimit(RLIMIT_DATA, attr->limit_mem)) != 0) {
return errno;
}
}
#elif defined(RLIMIT_VMEM)
if (attr->limit_mem != NULL) {
if ((setrlimit(RLIMIT_VMEM, attr->limit_mem)) != 0) {
return errno;
}
}
#endif
return APR_SUCCESS;
}
#endif
#endif
apr_status_t apr_create_process(apr_proc_t *new, const char *progname,
char *const args[], char **env,
apr_procattr_t *attr, apr_pool_t *cont)
{
int i;
typedef const char *my_stupid_string;
my_stupid_string *newargs;
new->in = attr->parent_in;
new->err = attr->parent_err;
new->out = attr->parent_out;
if ((new->pid = fork()) < 0) {
return errno;
}
else if (new->pid == 0) {
int status;
/* child process */
if (attr->child_in) {
apr_close(attr->parent_in);
dup2(attr->child_in->filedes, STDIN_FILENO);
apr_close(attr->child_in);
}
if (attr->child_out) {
apr_close(attr->parent_out);
dup2(attr->child_out->filedes, STDOUT_FILENO);
apr_close(attr->child_out);
}
if (attr->child_err) {
apr_close(attr->parent_err);
dup2(attr->child_err->filedes, STDERR_FILENO);
apr_close(attr->child_err);
}
apr_signal(SIGCHLD, SIG_DFL); /*not sure if this is needed or not */
if (attr->currdir != NULL) {
if (chdir(attr->currdir) == -1) {
exit(-1); /* We have big problems, the child should exit. */
}
}
apr_cleanup_for_exec();
#if defined(RLIMIT_CPU) || defined(RLIMIT_NPROC) || defined(RLIMIT_AS) || defined(RLIMIT_DATA) || defined(RLIMIT_VMEM)
if ((status = limit_proc(attr)) != APR_SUCCESS) {
return status;
}
#endif
if (attr->cmdtype == APR_SHELLCMD) {
i = 0;
while (args[i]) {
i++;
}
newargs =
(my_stupid_string *) apr_palloc(cont, sizeof (char *) * (i + 3));
newargs[0] = SHELL_PATH;
newargs[1] = "-c";
i = 0;
while (args[i]) {
newargs[i + 2] = args[i];
i++;
}
newargs[i + 3] = NULL;
if (attr->detached) {
apr_detach();
}
execve(SHELL_PATH, (char **) newargs, env);
}
else {
if (attr->detached) {
apr_detach();
}
execve(progname, args, env);
}
exit(-1); /* if we get here, there is a problem, so exit with an */
/* error code. */
}
/* Parent process */
if (attr->child_in) {
apr_close(attr->child_in);
}
if (attr->child_out) {
apr_close(attr->child_out);
}
if (attr->child_err) {
apr_close(attr->child_err);
}
return APR_SUCCESS;
}
apr_status_t apr_wait_all_procs(apr_proc_t *proc, apr_wait_t *status,
apr_wait_how_e waithow, apr_pool_t *p)
{
int waitpid_options = WUNTRACED;
if (waithow != APR_WAIT) {
waitpid_options |= WNOHANG;
}
if ((proc->pid = waitpid(-1, status, waitpid_options)) > 0) {
return APR_CHILD_DONE;
}
else if (proc->pid == 0) {
return APR_CHILD_NOTDONE;
}
return errno;
}
apr_status_t apr_wait_proc(apr_proc_t *proc,
apr_wait_how_e waithow)
{
pid_t status;
if (!proc)
return APR_ENOPROC;
if (waithow == APR_WAIT) {
if ((status = waitpid(proc->pid, NULL, WUNTRACED)) > 0) {
return APR_CHILD_DONE;
}
else if (status == 0) {
return APR_CHILD_NOTDONE;
}
return errno;
}
if ((status = waitpid(proc->pid, NULL, WUNTRACED | WNOHANG)) > 0) {
return APR_CHILD_DONE;
}
else if (status == 0) {
return APR_CHILD_NOTDONE;
}
return errno;
}
apr_status_t apr_setprocattr_limit(apr_procattr_t *attr, apr_int32_t what,
struct rlimit *limit)
{
switch(what) {
case APR_LIMIT_CPU:
#ifdef RLIMIT_CPU
attr->limit_cpu = limit;
break;
#else
return APR_ENOTIMPL;
#endif
case APR_LIMIT_MEM:
#if defined (RLIMIT_DATA) || defined (RLIMIT_VMEM) || defined(RLIMIT_AS)
attr->limit_mem = limit;
break;
#else
return APR_ENOTIMPL;
#endif
case APR_LIMIT_NPROC:
#ifdef RLIMIT_NPROC
attr->limit_nproc = limit;
break;
#else
return APR_ENOTIMPL;
#endif
}
return APR_SUCCESS;
}
|