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#include "copyright.h" |
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| 12 |
< |
/* find pipe buffer limit */ |
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< |
#include <sys/param.h> |
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> |
#include "rtprocess.h" |
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|
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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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> |
/* |
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|
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< |
#include "vfork.h" |
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> |
The functions open_process() and close_process() exist in |
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> |
(currently) two versions, which are found in the files: |
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|
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< |
#ifndef BSD |
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< |
#include <errno.h> |
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< |
#endif |
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> |
win_process.c |
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> |
unix_process.c |
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|
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+ |
*/ |
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|
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int |
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< |
open_process(pd, av) /* open communication to separate process */ |
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< |
int pd[3]; |
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< |
char *av[]; |
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> |
process( /* process data through pd */ |
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> |
SUBPROC *pd, |
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> |
char *recvbuf, char *sendbuf, |
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> |
int nbr, int nbs |
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> |
) |
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{ |
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– |
extern char *getpath(), *getenv(); |
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– |
char *compath; |
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– |
int p0[2], p1[2]; |
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– |
/* find executable */ |
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– |
compath = getpath(av[0], getenv("PATH"), 1); |
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– |
if (compath == 0) |
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– |
return(0); |
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– |
if (pipe(p0) < 0 || pipe(p1) < 0) |
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– |
return(-1); |
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– |
if ((pd[2] = vfork()) == 0) { /* if child */ |
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– |
close(p0[1]); |
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– |
close(p1[0]); |
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– |
if (p0[0] != 0) { /* connect p0 to stdin */ |
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– |
dup2(p0[0], 0); |
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– |
close(p0[0]); |
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– |
} |
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– |
if (p1[1] != 1) { /* connect p1 to stdout */ |
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– |
dup2(p1[1], 1); |
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– |
close(p1[1]); |
| 58 |
– |
} |
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– |
execv(compath, av); /* exec command */ |
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– |
perror(compath); |
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– |
_exit(127); |
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– |
} |
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– |
if (pd[2] == -1) |
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– |
return(-1); |
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– |
close(p0[0]); |
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– |
close(p1[1]); |
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– |
pd[0] = p1[0]; |
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– |
pd[1] = p0[1]; |
| 69 |
– |
return(PIPE_BUF); |
| 70 |
– |
} |
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– |
|
| 72 |
– |
|
| 73 |
– |
int |
| 74 |
– |
process(pd, recvbuf, sendbuf, nbr, nbs) /* process data through pd */ |
| 75 |
– |
int pd[3]; |
| 76 |
– |
char *recvbuf, *sendbuf; |
| 77 |
– |
int nbr, nbs; |
| 78 |
– |
{ |
| 31 |
|
if (nbs > PIPE_BUF) |
| 32 |
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return(-1); |
| 33 |
< |
if (writebuf(pd[1], sendbuf, nbs) < nbs) |
| 33 |
> |
if (writebuf(pd->w, sendbuf, nbs) < nbs) |
| 34 |
|
return(-1); |
| 35 |
< |
return(readbuf(pd[0], recvbuf, nbr)); |
| 35 |
> |
return(readbuf(pd->r, recvbuf, nbr)); |
| 36 |
|
} |
| 37 |
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|
| 38 |
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|
| 87 |
– |
int |
| 88 |
– |
close_process(pd) /* close pipes and wait for process */ |
| 89 |
– |
int pd[3]; |
| 90 |
– |
{ |
| 91 |
– |
int pid, status; |
| 39 |
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|
| 93 |
– |
close(pd[1]); |
| 94 |
– |
close(pd[0]); |
| 95 |
– |
while ((pid = wait(&status)) != -1) |
| 96 |
– |
if (pid == pd[2]) |
| 97 |
– |
return(status>>8 & 0xff); |
| 98 |
– |
return(-1); /* ? unknown status */ |
| 99 |
– |
} |
| 100 |
– |
|
| 101 |
– |
|
| 40 |
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int |
| 41 |
< |
readbuf(fd, bpos, siz) /* read all of requested buffer */ |
| 42 |
< |
int fd; |
| 43 |
< |
char *bpos; |
| 44 |
< |
int siz; |
| 41 |
> |
readbuf( /* read all of requested buffer */ |
| 42 |
> |
int fd, |
| 43 |
> |
char *bpos, |
| 44 |
> |
int siz |
| 45 |
> |
) |
| 46 |
|
{ |
| 47 |
|
register int cc = 0, nrem = siz; |
| 48 |
|
retry: |
| 62 |
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|
| 63 |
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|
| 64 |
|
int |
| 65 |
< |
writebuf(fd, bpos, siz) /* write all of requested buffer */ |
| 66 |
< |
int fd; |
| 67 |
< |
char *bpos; |
| 68 |
< |
int siz; |
| 65 |
> |
writebuf( /* write all of requested buffer */ |
| 66 |
> |
int fd, |
| 67 |
> |
char *bpos, |
| 68 |
> |
int siz |
| 69 |
> |
) |
| 70 |
|
{ |
| 71 |
|
register int cc = 0, nrem = siz; |
| 72 |
|
retry: |
