| 171 |
|
error(SYSTEM, "fork failed in io_process"); |
| 172 |
|
/* connect to appropriate pipe */ |
| 173 |
|
if (pid) { /* parent passes renderer output */ |
| 174 |
< |
if (freopen(pfout, "r", stdin) == NULL) |
| 174 |
> |
close(0); |
| 175 |
> |
if (open(pfout, O_RDONLY) != 0) |
| 176 |
|
error(SYSTEM, "cannot open input pipe in io_process"); |
| 177 |
|
} else { /* child passes renderer input */ |
| 178 |
< |
if (freopen(pfin, "w", stdout) == NULL) |
| 179 |
< |
error(SYSTEM, "cannot open input pipe in io_process"); |
| 178 |
> |
close(1); |
| 179 |
> |
if (open(pfin, O_WRONLY) != 1) |
| 180 |
> |
error(SYSTEM, "cannot open output pipe in io_process"); |
| 181 |
|
} |
| 182 |
|
/* pass input to output */ |
| 183 |
|
cp = buf; n = sizeof(buf); |
| 184 |
< |
while ((nr = read(fileno(stdin), cp, n)) > 0) { |
| 184 |
> |
/* do as much as we can each way */ |
| 185 |
> |
while ((nr = read(0, cp, n)) > 0) { |
| 186 |
|
nr += cp-buf; |
| 187 |
< |
if ((n = write(fileno(stdout), buf, nr)) <= 0) |
| 188 |
< |
error(SYSTEM, "write error in io_process"); |
| 187 |
> |
if ((n = write(1, buf, nr)) <= 0) |
| 188 |
> |
goto writerr; |
| 189 |
|
cp = buf; |
| 190 |
|
while (n < nr) |
| 191 |
|
*cp++ = buf[n++]; |
| 192 |
|
n = sizeof(buf) - (cp-buf); |
| 193 |
|
} |
| 194 |
< |
fclose(stdin); |
| 195 |
< |
fclose(stdout); |
| 194 |
> |
if (nr < 0) |
| 195 |
> |
error(SYSTEM, "read error in io_process"); |
| 196 |
> |
close(0); /* close input */ |
| 197 |
> |
nr = cp-buf; /* write remainder */ |
| 198 |
> |
cp = buf; |
| 199 |
> |
while (nr > 0) { |
| 200 |
> |
if ((n = write(1, cp, nr)) <= 0) |
| 201 |
> |
goto writerr; |
| 202 |
> |
cp += n; |
| 203 |
> |
nr -= n; |
| 204 |
> |
} |
| 205 |
> |
close(1); /* close output */ |
| 206 |
|
if (pid) /* parent waits for child */ |
| 207 |
|
wait(0); |
| 208 |
|
exit(0); /* all done, exit (not quit!) */ |
| 209 |
|
formerr: |
| 210 |
|
error(USER, "format error in persist file"); |
| 211 |
+ |
writerr: |
| 212 |
+ |
error(SYSTEM, "write error in io_process"); |
| 213 |
|
} |
| 214 |
|
|
| 215 |
|
#endif |
