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13 |
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#ifdef F_SETLKW |
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#include "paths.h" |
15 |
+ |
#include "selcall.h" |
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#include <signal.h> |
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#include <sys/types.h> |
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#include <sys/stat.h> |
18 |
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/* select call compatibility stuff */ |
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#ifndef FD_SETSIZE |
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#include <sys/param.h> |
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#define FD_SETSIZE NOFILE /* maximum # select file descriptors */ |
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#endif |
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#ifndef FD_SET |
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#ifndef NFDBITS |
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#define NFDBITS (8*sizeof(int)) /* number of bits per fd_mask */ |
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#endif |
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#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS))) |
28 |
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#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS))) |
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#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS))) |
30 |
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#define FD_ZERO(p) bzero((char *)(p), sizeof(*(p))) |
31 |
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#endif |
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|
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#ifndef TIMELIM |
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#define TIMELIM (8*3600) /* time limit for holding pattern */ |
126 |
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n = strlen(buf); |
127 |
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if (write(persistfd, buf, n) < n) |
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error(SYSTEM, "error writing persist file"); |
129 |
+ |
lseek(persistfd, 0L, 0); |
130 |
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/* wait TIMELIM for someone to signal us */ |
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got_io = 0; |
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signal(SIGIO, sig_io); |
135 |
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pflock(0); /* unlock persist file for attach */ |
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while (!got_io) |
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pause(); /* wait for attach */ |
151 |
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pflock(1); /* grab persist file right back! */ |
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alarm(0); /* turn off alarm */ |
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signal(SIGALRM, oldalrm); |
140 |
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signal(SIGIO, SIG_DFL); |
141 |
< |
if (lseek(persistfd, 0L, 0) < 0 || ftruncate(persistfd, 0L) < 0) |
156 |
< |
error(SYSTEM, "seek/truncate error on persist file"); |
141 |
> |
pflock(1); /* grab persist file back */ |
142 |
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/* someone wants us; reopen stdin and stdout */ |
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if (freopen(inpname, "r", stdin) == NULL) |
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goto openerr; |
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if (freopen(outpname, "w", stdout) == NULL) |
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goto openerr; |
147 |
+ |
sleep(3); /* give them a chance to open their pipes */ |
148 |
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if (errname[0]) { |
149 |
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if (freopen(errname, "w", stderr) == NULL) |
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goto openerr; |
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register int nr, n; |
170 |
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char buf[BUFSIZ], *pfin, *pfout, *pferr; |
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int pid, nfds; |
172 |
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int fdin, fdout, fderr = -1; |
173 |
< |
fd_set readfds, writefds, excepfds; |
172 |
> |
int fdout, fderr = -1; |
173 |
> |
int status = 0; |
174 |
> |
fd_set readfds, excepfds; |
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/* load persist file */ |
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+ |
n = 40; |
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while ((nr = read(persistfd, buf, sizeof(buf)-1)) == 0) { |
178 |
+ |
if (!n--) |
179 |
+ |
error(USER, "unattended persist file?"); |
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pflock(0); |
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sleep(15); /* wait until ready */ |
182 |
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pflock(1); |
183 |
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} |
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pfdetach(); /* close persist file */ |
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if (nr < 0) |
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error(SYSTEM, "error reading persist file"); |
186 |
< |
buf[nr] = '\0'; |
186 |
> |
ftruncate(persistfd, 0L); /* truncate persist file */ |
187 |
> |
pfdetach(); /* close & release persist file */ |
188 |
> |
buf[nr] = '\0'; /* parse what we got */ |
189 |
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if ((cp = index(buf, ' ')) == NULL) |
190 |
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goto formerr; |
191 |
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*cp++ = '\0'; |
214 |
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/* wake up rendering process */ |
215 |
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if (kill(pid, SIGIO) < 0) |
216 |
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error(SYSTEM, "cannot signal rendering process in io_process"); |
217 |
< |
/* open named pipes, in order */ |
218 |
< |
if ((fdin = open(pfin, O_WRONLY)) < 0) |
219 |
< |
error(SYSTEM, "cannot open input pipe in io_process"); |
217 |
> |
/* fork child feeder process */ |
218 |
> |
pid = fork(); |
219 |
> |
if (pid < 0) |
220 |
> |
error(SYSTEM, "fork failed in io_process"); |
221 |
> |
if (pid == 0) { /* feeder loop */ |
222 |
> |
int fdin; |
223 |
> |
close(1); /* open input pipe */ |
224 |
> |
if ((fdin = open(pfin, O_WRONLY)) < 0) |
225 |
> |
error(SYSTEM, "cannot open feed pipe in io_process"); |
226 |
> |
/* renderer stdin */ |
227 |
> |
while ((nr = read(0, cp=buf, sizeof(buf))) > 0) { |
228 |
> |
do { |
229 |
> |
if ((n = write(fdin, cp, nr)) <= 0) |
230 |
> |
goto writerr; |
231 |
> |
cp += n; |
232 |
> |
} while ((nr -= n) > 0); |
233 |
> |
} |
234 |
> |
if (nr < 0) |
235 |
> |
goto readerr; |
236 |
> |
_exit(0); |
237 |
> |
} |
238 |
> |
close(0); |
239 |
> |
/* open output pipes, in order */ |
240 |
|
if ((fdout = open(pfout, O_RDONLY)) < 0) |
241 |
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error(SYSTEM, "cannot open output pipe in io_process"); |
242 |
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if (pferr[0] && (fderr = open(pferr, O_RDONLY)) < 0) |
243 |
|
error(SYSTEM, "cannot open error pipe in io_process"); |
244 |
< |
for ( ; ; ) { /* loop on select call */ |
244 |
> |
for ( ; ; ) { /* eater loop */ |
245 |
|
FD_ZERO(&readfds); |
235 |
– |
FD_ZERO(&writefds); |
246 |
|
FD_ZERO(&excepfds); |
247 |
|
nfds = 0; |
238 |
– |
if (fdin >= 0) { |
239 |
– |
FD_SET(fdin, &writefds); |
240 |
– |
FD_SET(fdin, &excepfds); |
241 |
– |
nfds = fdin+1; |
242 |
– |
} |
248 |
|
if (fdout >= 0) { |
249 |
|
FD_SET(fdout, &readfds); |
250 |
|
FD_SET(fdout, &excepfds); |
257 |
|
} |
258 |
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if (nfds == 0) |
259 |
|
break; /* all done, exit */ |
260 |
< |
if (select(nfds, &readfds, &writefds, &excepfds, NULL) < 0) |
260 |
> |
if (select(nfds, &readfds, NULL, &excepfds, NULL) < 0) |
261 |
|
error(SYSTEM, "error in select call in io_process"); |
262 |
|
/* renderer stderr */ |
263 |
|
if (fderr >= 0 && (FD_ISSET(fderr, &readfds) || |
267 |
|
goto readerr; |
268 |
|
if (nr == 0) { |
269 |
|
close(fderr); |
270 |
< |
close(2); |
270 |
> |
/* close(2); don't close stderr! */ |
271 |
|
fderr = -1; |
272 |
|
} else |
273 |
< |
do { /* write it all */ |
273 |
> |
cp[nr] = '\0'; /* deduce status if we can */ |
274 |
> |
n = strlen(progname); |
275 |
> |
if (!strncmp(cp, progname, n) && |
276 |
> |
cp[n++] == ':' && |
277 |
> |
cp[n++] == ' ') { |
278 |
> |
register struct erract *ep; |
279 |
> |
for (ep = erract; ep < erract+NERRS; |
280 |
> |
ep++) |
281 |
> |
if (ep->pre[0] && |
282 |
> |
!strncmp(cp+n, ep->pre, |
283 |
> |
strlen(ep->pre))) { |
284 |
> |
status = ep->ec; |
285 |
> |
break; |
286 |
> |
} |
287 |
> |
} |
288 |
> |
do { /* write message */ |
289 |
|
if ((n = write(2, cp, nr)) <= 0) |
290 |
|
goto writerr; |
291 |
|
cp += n; |
308 |
|
cp += n; |
309 |
|
} while ((nr -= n) > 0); |
310 |
|
} |
291 |
– |
/* renderer stdin */ |
292 |
– |
if (fdin >= 0 && (FD_ISSET(fdin, &writefds) || |
293 |
– |
FD_ISSET(fdin, &excepfds))) { |
294 |
– |
nr = read(0, buf, 512); /* use minimal buffer */ |
295 |
– |
if (nr < 0) |
296 |
– |
goto readerr; |
297 |
– |
if (nr == 0) { |
298 |
– |
close(0); |
299 |
– |
close(fdin); |
300 |
– |
fdin = -1; |
301 |
– |
} else if (write(fdin, buf, nr) < nr) |
302 |
– |
goto writerr; /* what else to do? */ |
303 |
– |
} |
311 |
|
} |
312 |
< |
_exit(0); /* we ought to return renderer error status! */ |
312 |
> |
wait(0); /* wait for feeder process */ |
313 |
> |
_exit(status); |
314 |
|
formerr: |
315 |
|
error(USER, "format error in persist file"); |
316 |
|
readerr: |