#ifndef UNIXPROCESS_MD.H
#define UNIXPROCESS_MD.H

#include <sys/types.h>

/* These numbers must be the same as the Enum in UNIXProcess.java
 * Must be a better way of doing this.
 */
#define MODE_CLONE 1
#define MODE_FORK 2
#define MODE_VFORK 3
#define MODE_SPAWN 4

typedef struct _ChildStuff
{
    int in[2];
    int out[2];
    int err[2];
    int fail[2];
    int childenv[2]; 
    int fds[3];
    int mode;
    const char **argv;
    int argc;
    const char **envv;
    const char *pdir;
    int redirectErrorStream;
    void *clone_stack;
} ChildStuff;

/* following used in addition when mode is SPAWN */

typedef struct _SpawnInfo {
    int nargv; /* number of argv array elements  */
    int argvBytes; /* total number of bytes in argv array */
    int nenvv; /* number of envv array elements  */
    int envvBytes; /* total number of bytes in envv array */
    int dirlen; /* length of home directory string */
    int parentPathLen; /* length of parentPath string */
    int nparentPathv; /* number of elements in parentPathv array */
    int parentPathvBytes; /* total number of bytes in parentPathv array */
} SpawnInfo;

extern const char *xx_parentPath;
extern const char * const *xx_parentPathv;

ssize_t xx_readFully(int fd, void *buf, size_t nbyte);
void xx_initVectorFromBlock(const char**vector, const char* block, int count);
int xx_childProcess(void *arg);
const char * const * xx_splitPath(const char *path);

#endif