Subversion Repositories c0or1k

/*

 * l4/posix glue for execve()

 *

 * Copyright (C) 2007 Bahadir Balban

 */

#include <errno.h>

#include <stdio.h>

#include <stdarg.h>

#include <string.h>

#include <sys/shm.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <l4lib/ipcdefs.h>

#include <l4lib/utcb.h>

#include <fcntl.h>

#include <l4/macros.h>

#include INC_GLUE(memory.h)

#include <libposix.h>

struct sys_execve_args {

        char *path;

        char **argv;

        char **envp;

};

static inline int l4_execve(const char *pathname, char *const argv[], char *const envp[])

{

        int err = 0;

        write_mr(L4SYS_ARG0, (unsigned long)pathname);

        write_mr(L4SYS_ARG1, (unsigned long)argv);

        write_mr(L4SYS_ARG2, (unsigned long)envp);

        /* Call pager with open() request. Check ipc error. */

        if ((err = l4_sendrecv(pagerid, pagerid, L4_IPC_TAG_EXECVE)) < 0) {

                print_err("%s: L4 IPC Error: %d.\n", __FUNCTION__, err);

                return err;

        }

        /* Check if syscall itself was successful */

        if ((err = l4_get_retval()) < 0) {

                print_err("%s: OPEN Error: %d.\n", __FUNCTION__, err);

                return err;

        }

        return err;

}

int execve(const char *pathname, char *const argv[], char *const envp[])

{

        int ret;

        ret = l4_execve(pathname, argv, envp);

        /* If error, return positive error code */

        if (ret < 0) {

                errno = -ret;

                return -1;

        }

        /* else return value */

        return ret;

}