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/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <kernel/OS.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
struct pipefd {
int in;
int out;
int err;
};
int main(int argc, char *argv[]) {
/* we expect the following...
*
* argv[0] = this stub
* argv[1] = directory to run in...
* argv[2] = progname to execute
* rest of arguments to be passed to program
*/
char *progname = argv[2];
char *directory = argv[1];
struct pipefd *pfd;
thread_id sender;
void *buffer;
char ** newargs;
int i = 0;
newargs = (char**)malloc(sizeof(char*) * (argc - 1));
buffer = (void*)malloc(sizeof(struct pipefd));
/* this will block until we get the data */
receive_data(&sender, buffer, sizeof(struct pipefd));
pfd = (struct pipefd*)buffer;
if (pfd->in > STDERR_FILENO) {
if (dup2(pfd->in, STDIN_FILENO) != STDIN_FILENO) return (-1);
close (pfd->in);
}
if (pfd->out > STDERR_FILENO) {
if (dup2(pfd->out, STDOUT_FILENO) != STDOUT_FILENO) return (-1);
close (pfd->out);
}
if (pfd->err > STDERR_FILENO) {
if (dup2(pfd->err, STDERR_FILENO) != STDERR_FILENO) return (-1);
close (pfd->err);
}
for (i=3;i<=argc;i++){
newargs[i-3] = argv[i];
}
/* tell the caller we're OK to start */
send_data(sender,1,NULL,0);
if (directory != NULL)
chdir(directory);
execve (progname, newargs, environ);
return (-1);
}
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