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greg |
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/* RCSid $Id: rtprocess.h,v 3.1 2003/06/26 00:58:09 schorsch Exp $ */ |
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schorsch |
3.1 |
/* |
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* rtprocess.h |
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* Routines to communicate with separate process via dual pipes |
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* |
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* WARNING: On Windows, there's a system header named <process.h>. |
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*/ |
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#ifndef _RAD_PROCESS_H_ |
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#define _RAD_PROCESS_H_ |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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#include <sys/types.h> |
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#ifdef _WIN32 |
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#include <windows.h> |
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#else |
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#include <sys/param.h> |
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#include <unistd.h> |
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#endif |
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#ifndef BSD |
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#include <errno.h> |
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#endif |
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#include "paths.h" |
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/* On Windows, a process ID is a DWORD. That might actually be the |
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same thing as an int, but it's better not to assume anything. |
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This means that we shouldn't rely on PIDs and file descriptors |
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being the same type, so we have to describe processes with a struct, |
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instead of the original int[3]. To keep things simple, we typedef |
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the posix pid_t on those systems that don't have it already. |
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Some older Windows systems use negative PIDs. Open_process() and |
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close_process() will convert those to positive values during |
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runtime, so that client modules can still use -1 as invalid PID. |
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*/ |
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#ifdef _WIN32 |
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typedef DWORD pid_t; |
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#endif |
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#ifndef PIPE_BUF |
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#ifdef PIPSIZ |
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#define PIPE_BUF PIPSIZ |
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#else |
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#ifdef PIPE_MAX |
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#define PIPE_BUF PIPE_MAX |
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#else |
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#define PIPE_BUF 512 /* hyperconservative */ |
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#endif |
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#endif |
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#endif |
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typedef struct { |
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int r; /* read handle */ |
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int w; /* write handle */ |
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int running; /* doing something */ |
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pid_t pid; /* process ID */ |
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} SUBPROC; |
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#define SP_INACTIVE {-1,-1,0,0} /* for static initializations */ |
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extern int open_process(SUBPROC *pd, char *av[]); |
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extern int close_process(SUBPROC *pd); |
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extern int process(SUBPROC *pd, char *recvbuf, char *sendbuf, int nbr, int nbs); |
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extern int readbuf(int fd, char *bpos, int siz); |
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extern int writebuf(int fd, char *bpos, int siz); |
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#ifdef __cplusplus |
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} |
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#endif |
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#endif /* _RAD_PROCESS_H_ */ |
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