#pragma prototyped

#ifndef _PROC_H

#define _PROC_H

#include <ast.h>

#define PROC_ARGMOD (1<<0) /* argv[-1],argv[0] can be modified */

#define PROC_BACKGROUND (1<<1) /* shell background (&) setup */

#define PROC_CHECK (1<<17) /* check that command exists */

#define PROC_CLEANUP (1<<2) /* close parent redirect fds on error */

#define PROC_DAEMON (1<<3) /* daemon setup */

#define PROC_ENVCLEAR (1<<4) /* clear environment */

#define PROC_FOREGROUND (1<<14) /* system(3) setup */

#define PROC_GID (1<<5) /* setgid(getgid()) */

#define PROC_IGNORE (1<<6) /* ignore parent pipe errors */

#define PROC_IGNOREPATH (1<<16) /* procrun() intercept to ignore path */

#define PROC_OVERLAY (1<<7) /* overlay current process if possible */

#define PROC_PARANOID (1<<8) /* restrict everything */

#define PROC_PRIVELEGED (1<<9) /* setuid(0), setgid(getegid()) */

#define PROC_READ (1<<10) /* proc pipe fd 1 returned */

#define PROC_SESSION (1<<11) /* session leader */

#define PROC_UID (1<<12) /* setuid(getuid()) */

#define PROC_WRITE (1<<13) /* proc pipe fd 0 returned */

#define PROC_ZOMBIE (1<<15) /* proc may leave a zombie behind */

#define PROC_ARG_BIT 14 /* bits per op arg */

#define PROC_OP_BIT 4 /* bits per op */

#define PROC_ARG_NULL ((1<<PROC_ARG_BIT)-1)

#define PROC_fd_dup 0x4

#define PROC_FD_CHILD 0x1

#define PROC_FD_PARENT 0x2

#define PROC_sig_dfl 0x8

#define PROC_sig_ign 0x9

#define PROC_sys_pgrp 0xa

#define PROC_sys_umask 0xb

#define PROC_op1(o,a) (((o)<<(2*PROC_ARG_BIT))|((a)&((PROC_ARG_NULL<<PROC_ARG_BIT)|PROC_ARG_NULL)))

#define PROC_op2(o,a,b) (((o)<<(2*PROC_ARG_BIT))|(((b)&PROC_ARG_NULL)<<PROC_ARG_BIT)|((a)&PROC_ARG_NULL))

#define PROC_FD_CLOSE(p,f) PROC_op2(PROC_fd_dup|(f),p,PROC_ARG_NULL)

#define PROC_FD_DUP(p,c,f) PROC_op2(PROC_fd_dup|(f),p,c)

#define PROC_SIG_DFL(s) PROC_op1(PROC_sig_dfl,s,0)

#define PROC_SIG_IGN(s) PROC_op1(PROC_sig_ign,s,0)

#define PROC_SYS_PGRP(g) PROC_op1(PROC_sys_pgrp,g)

#define PROC_SYS_UMASK(m) PROC_op1(PROC_sys_umask,m,0)

#define PROC_OP(x) (((x)>>(2*PROC_ARG_BIT))&((1<<PROC_OP_BIT)-1))

#define PROC_ARG(x,n) ((n)?(((x)>>(((n)-1)*PROC_ARG_BIT))&PROC_ARG_NULL):(((x)&~((1<<(2*PROC_ARG_BIT))-1))==~((1<<(2*PROC_ARG_BIT))-1))?(-1):((x)&~((1<<(2*PROC_ARG_BIT))-1)))

typedef struct

{

pid_t pid; /* process id */

pid_t pgrp; /* process group id */

int rfd; /* read fd if applicable */

int wfd; /* write fd if applicable */

#ifdef _PROC_PRIVATE_

#endif

} Proc_t;

#if _BLD_ast && defined(__EXPORT__)

#define extern __EXPORT__

#endif

extern int procclose(Proc_t*);

extern int procfree(Proc_t*);

extern Proc_t* procopen(const char*, char**, char**, long*, int);

extern int procrun(const char*, char**, int);

#undef extern

#endif