1 |
– |
/* Copyright (c) 1993 Regents of the University of California */ |
2 |
– |
|
1 |
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#ifndef lint |
2 |
< |
static char SCCSid[] = "$SunId$ LBL"; |
2 |
> |
static const char RCSid[] = "$Id$"; |
3 |
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#endif |
6 |
– |
|
4 |
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/* |
5 |
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* Routines for persistent rtrace and rpict processes. |
6 |
+ |
* |
7 |
+ |
* External symbols declared in ray.h |
8 |
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*/ |
9 |
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|
10 |
< |
#include "standard.h" |
11 |
< |
#include "paths.h" |
10 |
> |
#include "copyright.h" |
11 |
> |
|
12 |
> |
#include <string.h> |
13 |
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#include <signal.h> |
14 |
– |
#include <sys/types.h> |
14 |
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#include <sys/stat.h> |
15 |
+ |
#include <sys/types.h> |
16 |
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|
17 |
< |
extern char *strcpy(), *index(); |
17 |
> |
#include "platform.h" |
18 |
> |
#ifndef NON_POSIX /* XXX need abstraction for process management */ |
19 |
> |
#include <sys/wait.h> |
20 |
> |
#endif |
21 |
|
|
22 |
< |
extern int headismine; /* boolean true if header belongs to me */ |
22 |
> |
#include "rtprocess.h" /* getpid() */ |
23 |
> |
#include "standard.h" |
24 |
> |
#include "random.h" |
25 |
> |
#include "ray.h" |
26 |
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|
27 |
+ |
#ifdef F_SETLKW |
28 |
+ |
#include "paths.h" |
29 |
+ |
#include "selcall.h" |
30 |
+ |
|
31 |
+ |
#ifndef TIMELIM |
32 |
+ |
#define TIMELIM (8*3600) /* time limit for holding pattern */ |
33 |
+ |
#endif |
34 |
+ |
|
35 |
+ |
extern int headismine; /* boolean true if header belongs to me */ |
36 |
+ |
extern char *progname; /* global program name */ |
37 |
+ |
extern char *errfile; /* global error file name */ |
38 |
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static char *persistfname = NULL; /* persist file name */ |
39 |
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static int persistfd = -1; /* persist file descriptor */ |
40 |
+ |
static char inpname[TEMPLEN+1], outpname[TEMPLEN+1], errname[TEMPLEN+1]; |
41 |
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|
42 |
< |
static char inpname[TEMPLEN+1], outpname[TEMPLEN+1]; |
42 |
> |
typedef void (sighandler_t)(int); |
43 |
> |
static sighandler_t sig_io; |
44 |
> |
static sighandler_t sig_alrm; |
45 |
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|
46 |
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|
47 |
< |
pfdetach() /* release persist (and header) resources */ |
47 |
> |
extern void |
48 |
> |
pfdetach(void) /* release persist (and header) resources */ |
49 |
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{ |
50 |
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if (persistfd >= 0) |
51 |
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close(persistfd); |
53 |
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persistfname = NULL; |
54 |
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inpname[0] = '\0'; |
55 |
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outpname[0] = '\0'; |
56 |
+ |
errname[0] = '\0'; |
57 |
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headismine = 0; |
58 |
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} |
59 |
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|
60 |
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|
61 |
< |
pfclean() /* clean up persist files */ |
61 |
> |
extern void |
62 |
> |
pfclean(void) /* clean up persist files */ |
63 |
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{ |
64 |
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if (persistfd >= 0) |
65 |
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close(persistfd); |
69 |
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unlink(inpname); |
70 |
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if (outpname[0]) |
71 |
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unlink(outpname); |
72 |
+ |
if (errname[0]) |
73 |
+ |
unlink(errname); |
74 |
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} |
75 |
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|
76 |
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|
77 |
< |
pflock(lf) /* place or release exclusive lock on file */ |
78 |
< |
int lf; |
77 |
> |
extern void |
78 |
> |
pflock( /* place or release exclusive lock on file */ |
79 |
> |
int lf |
80 |
> |
) |
81 |
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{ |
82 |
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struct flock fls; |
83 |
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|
90 |
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} |
91 |
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|
92 |
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|
93 |
< |
persistfile(pfn) /* open persist file and lock it */ |
94 |
< |
char *pfn; |
93 |
> |
extern void |
94 |
> |
persistfile( /* open persist file and lock it */ |
95 |
> |
char *pfn |
96 |
> |
) |
97 |
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{ |
98 |
< |
persistfd = open(pfn, O_WRONLY|O_CREAT|O_EXCL, 0666); |
98 |
> |
persistfd = open(pfn, O_WRONLY|O_CREAT|O_EXCL, 0644); |
99 |
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if (persistfd >= 0) { |
100 |
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persistfname = pfn; |
101 |
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pflock(1); |
112 |
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} |
113 |
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|
114 |
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|
115 |
< |
sig_noop() {} |
115 |
> |
static int got_io; |
116 |
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|
117 |
+ |
static void sig_io(int i) { got_io++; } |
118 |
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|
119 |
< |
pfhold() /* holding pattern for idle rendering process */ |
119 |
> |
static void sig_alrm(int i) { quit(0); } |
120 |
> |
|
121 |
> |
|
122 |
> |
extern void |
123 |
> |
pfhold(void) /* holding pattern for idle rendering process */ |
124 |
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{ |
125 |
< |
char buf[128]; |
125 |
> |
sighandler_t *oldalrm; |
126 |
> |
char buf[512]; |
127 |
|
register int n; |
128 |
|
/* close input and output descriptors */ |
129 |
< |
close(fileno(stdin)); |
130 |
< |
fflush(stdout); |
131 |
< |
close(fileno(stdout)); |
129 |
> |
close(0); |
130 |
> |
close(1); |
131 |
> |
if (errfile == NULL) |
132 |
> |
close(2); |
133 |
|
/* create named pipes for input and output */ |
134 |
< |
if (mknod(mktemp(strcpy(inpname,TEMPLATE)), S_IFIFO|0600) < 0) |
134 |
> |
if (mkfifo(mktemp(strcpy(inpname,TEMPLATE)), 0600) < 0) |
135 |
|
goto createrr; |
136 |
< |
if (mknod(mktemp(strcpy(outpname,TEMPLATE)), S_IFIFO|0600) < 0) |
136 |
> |
if (mkfifo(mktemp(strcpy(outpname,TEMPLATE)), 0600) < 0) |
137 |
|
goto createrr; |
138 |
< |
sprintf(buf, "%d\n%s\n%s\n", getpid(), inpname, outpname); |
139 |
< |
if (lseek(persistfd, 0L, 0) < 0) |
140 |
< |
error(SYSTEM, "seek error on persist file in pfhold"); |
138 |
> |
if (errfile == NULL && |
139 |
> |
mkfifo(mktemp(strcpy(errname,TEMPLATE)), 0600) < 0) |
140 |
> |
goto createrr; |
141 |
> |
sprintf(buf, "%s %d\n%s\n%s\n%s\n", progname, getpid(), |
142 |
> |
inpname, outpname, errname); |
143 |
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n = strlen(buf); |
144 |
|
if (write(persistfd, buf, n) < n) |
145 |
< |
error(SYSTEM, "error writing persist file in pfhold"); |
146 |
< |
/* wait for someone to signal us */ |
147 |
< |
signal(SIGALRM, sig_noop); |
148 |
< |
pflock(0); |
149 |
< |
pause(); |
150 |
< |
pflock(1); |
145 |
> |
error(SYSTEM, "error writing persist file"); |
146 |
> |
lseek(persistfd, (off_t)0, SEEK_SET); |
147 |
> |
/* wait TIMELIM for someone to signal us */ |
148 |
> |
got_io = 0; |
149 |
> |
signal(SIGIO, sig_io); |
150 |
> |
oldalrm = signal(SIGALRM, sig_alrm); |
151 |
> |
alarm(TIMELIM); |
152 |
> |
pflock(0); /* unlock persist file for attach */ |
153 |
> |
while (!got_io) |
154 |
> |
pause(); /* wait for attach */ |
155 |
> |
alarm(0); /* turn off alarm */ |
156 |
> |
signal(SIGALRM, oldalrm); |
157 |
> |
signal(SIGIO, SIG_DFL); |
158 |
> |
pflock(1); /* grab persist file back */ |
159 |
|
/* someone wants us; reopen stdin and stdout */ |
160 |
< |
if (freopen(inpname, "r", stdin) == NULL) |
161 |
< |
goto openerr; |
162 |
< |
if (freopen(outpname, "w", stdout) == NULL) |
163 |
< |
goto openerr; |
160 |
> |
close(0); |
161 |
> |
if (open(inpname, O_RDONLY) != 0) |
162 |
> |
error(INTERNAL, "unexpected stdin file number"); |
163 |
> |
clearerr(stdin); |
164 |
> |
close(1); |
165 |
> |
if (open(outpname, O_WRONLY) != 1) |
166 |
> |
error(INTERNAL, "unexpected stdout file number"); |
167 |
> |
sleep(3); /* give them a chance to open their pipes */ |
168 |
> |
if (errname[0]) { |
169 |
> |
close(2); |
170 |
> |
if (open(errname, O_WRONLY) != 2) |
171 |
> |
error(INTERNAL, "unexpected stderr file number"); |
172 |
> |
unlink(errname); |
173 |
> |
errname[0] = '\0'; |
174 |
> |
} |
175 |
|
unlink(inpname); |
176 |
|
inpname[0] = '\0'; |
177 |
|
unlink(outpname); |
179 |
|
return; |
180 |
|
createrr: |
181 |
|
error(SYSTEM, "cannot create named pipes in pfhold"); |
125 |
– |
openerr: |
126 |
– |
error(SYSTEM, "cannot open named pipes in pfhold"); |
182 |
|
} |
183 |
|
|
184 |
|
|
185 |
< |
io_process() /* just act as conduits to and from actual process */ |
185 |
> |
extern void |
186 |
> |
io_process(void) /* just act as go-between for actual process */ |
187 |
|
{ |
188 |
|
register char *cp; |
189 |
|
register int nr, n; |
190 |
< |
char buf[4096], *pfin, *pfout; |
191 |
< |
int pid; |
192 |
< |
/* load and close persist file */ |
193 |
< |
nr = read(persistfd, buf, sizeof(buf)); |
194 |
< |
pfdetach(); |
190 |
> |
char buf[BUFSIZ], *pfin, *pfout, *pferr; |
191 |
> |
int pid, nfds; |
192 |
> |
int fdout, fderr = -1; |
193 |
> |
int status = 0; |
194 |
> |
fd_set readfds, excepfds; |
195 |
> |
/* load persist file */ |
196 |
> |
n = 40; |
197 |
> |
while ((nr = read(persistfd, buf, sizeof(buf)-1)) == 0) { |
198 |
> |
if (!n--) |
199 |
> |
error(USER, "unattended persist file?"); |
200 |
> |
pflock(0); |
201 |
> |
sleep(3+(3*getpid()+random())%13); /* wait until ready */ |
202 |
> |
pflock(1); |
203 |
> |
} |
204 |
|
if (nr < 0) |
205 |
< |
error(SYSTEM, "cannot read persist file"); |
206 |
< |
buf[nr] = '\0'; |
207 |
< |
if ((cp = index(buf, '\n')) == NULL) |
205 |
> |
error(SYSTEM, "error reading persist file"); |
206 |
> |
#ifndef _WIN32 /* XXX we need a replacement for that one */ |
207 |
> |
ftruncate(persistfd, (off_t)0L); /* truncate persist file */ |
208 |
> |
#endif |
209 |
> |
pfdetach(); /* close & release persist file */ |
210 |
> |
buf[nr] = '\0'; /* parse what we got */ |
211 |
> |
if ((cp = strchr(buf, ' ')) == NULL) |
212 |
|
goto formerr; |
213 |
|
*cp++ = '\0'; |
214 |
< |
if ((pid = atoi(buf)) <= 0) |
214 |
> |
if ((pid = atoi(cp)) <= 0) |
215 |
|
goto formerr; |
216 |
< |
pfin = cp; |
148 |
< |
if ((cp = index(cp, '\n')) == NULL) |
216 |
> |
if ((cp = strchr(cp, '\n')) == NULL) |
217 |
|
goto formerr; |
218 |
+ |
pfin = ++cp; |
219 |
+ |
if ((cp = strchr(cp, '\n')) == NULL) |
220 |
+ |
goto formerr; |
221 |
|
*cp++ = '\0'; |
222 |
|
pfout = cp; |
223 |
< |
if ((cp = index(cp, '\n')) == NULL) |
223 |
> |
if ((cp = strchr(cp, '\n')) == NULL) |
224 |
|
goto formerr; |
225 |
|
*cp++ = '\0'; |
226 |
+ |
pferr = cp; |
227 |
+ |
if ((cp = strchr(cp, '\n')) == NULL) |
228 |
+ |
goto formerr; |
229 |
+ |
*cp++ = '\0'; |
230 |
|
if (cp-buf != nr) |
231 |
|
goto formerr; |
232 |
< |
/* wake up rendering process */ |
233 |
< |
if (kill(pid, SIGALRM) < 0) |
232 |
> |
if (strcmp(buf, progname)) { |
233 |
> |
sprintf(errmsg, "persist file for %s, not %s", buf, progname); |
234 |
> |
error(USER, errmsg); |
235 |
> |
} |
236 |
> |
/* wake up rendering process */ |
237 |
> |
if (kill(pid, SIGIO) < 0) |
238 |
|
error(SYSTEM, "cannot signal rendering process in io_process"); |
239 |
< |
pid = fork(); /* fork i/o process */ |
239 |
> |
/* fork child feeder process */ |
240 |
> |
pid = fork(); |
241 |
|
if (pid < 0) |
242 |
|
error(SYSTEM, "fork failed in io_process"); |
243 |
< |
/* connect to appropriate pipe */ |
244 |
< |
if (pid) { /* parent passes renderer output */ |
245 |
< |
if (freopen(pfout, "r", stdin) == NULL) |
246 |
< |
error(SYSTEM, "cannot open input pipe in io_process"); |
247 |
< |
} else { /* child passes renderer input */ |
248 |
< |
if (freopen(pfin, "w", stdout) == NULL) |
249 |
< |
error(SYSTEM, "cannot open input pipe in io_process"); |
243 |
> |
if (pid == 0) { /* feeder loop */ |
244 |
> |
int fdin; |
245 |
> |
close(1); /* open input pipe */ |
246 |
> |
if ((fdin = open(pfin, O_WRONLY)) < 0) |
247 |
> |
error(SYSTEM, "cannot open feed pipe in io_process"); |
248 |
> |
/* renderer stdin */ |
249 |
> |
while ((nr = read(0, cp=buf, sizeof(buf))) > 0) { |
250 |
> |
do { |
251 |
> |
if ((n = write(fdin, cp, nr)) <= 0) |
252 |
> |
goto writerr; |
253 |
> |
cp += n; |
254 |
> |
} while ((nr -= n) > 0); |
255 |
> |
} |
256 |
> |
if (nr < 0) |
257 |
> |
goto readerr; |
258 |
> |
_exit(0); |
259 |
|
} |
260 |
< |
/* pass input to output */ |
261 |
< |
cp = buf; n = sizeof(buf); |
262 |
< |
while ((nr = read(fileno(stdin), cp, n)) > 0) { |
263 |
< |
nr += cp-buf; |
264 |
< |
if ((n = write(fileno(stdout), buf, nr)) <= 0) |
265 |
< |
error(SYSTEM, "write error in io_process"); |
266 |
< |
cp = buf; |
267 |
< |
while (n < nr) |
268 |
< |
*cp++ = buf[n++]; |
269 |
< |
n = sizeof(buf) - (cp-buf); |
260 |
> |
close(0); |
261 |
> |
/* open output pipes, in order */ |
262 |
> |
if ((fdout = open(pfout, O_RDONLY)) < 0) |
263 |
> |
error(SYSTEM, "cannot open output pipe in io_process"); |
264 |
> |
if (pferr[0] && (fderr = open(pferr, O_RDONLY)) < 0) |
265 |
> |
error(SYSTEM, "cannot open error pipe in io_process"); |
266 |
> |
for ( ; ; ) { /* eater loop */ |
267 |
> |
FD_ZERO(&readfds); |
268 |
> |
FD_ZERO(&excepfds); |
269 |
> |
nfds = 0; |
270 |
> |
if (fdout >= 0) { |
271 |
> |
FD_SET(fdout, &readfds); |
272 |
> |
FD_SET(fdout, &excepfds); |
273 |
> |
nfds = fdout+1; |
274 |
> |
} |
275 |
> |
if (fderr >= 0) { |
276 |
> |
FD_SET(fderr, &readfds); |
277 |
> |
FD_SET(fderr, &excepfds); |
278 |
> |
nfds = fderr+1; |
279 |
> |
} |
280 |
> |
if (nfds == 0) |
281 |
> |
break; /* all done, exit */ |
282 |
> |
if (select(nfds, &readfds, NULL, &excepfds, NULL) < 0) |
283 |
> |
error(SYSTEM, "error in select call in io_process"); |
284 |
> |
/* renderer stderr */ |
285 |
> |
if (fderr >= 0 && (FD_ISSET(fderr, &readfds) || |
286 |
> |
FD_ISSET(fderr, &excepfds))) { |
287 |
> |
nr = read(fderr, cp=buf, sizeof(buf)); |
288 |
> |
if (nr < 0) |
289 |
> |
goto readerr; |
290 |
> |
if (nr == 0) { |
291 |
> |
close(fderr); |
292 |
> |
/* close(2); don't close stderr! */ |
293 |
> |
fderr = -1; |
294 |
> |
} else { |
295 |
> |
cp[nr] = '\0'; /* deduce status if we can */ |
296 |
> |
n = strlen(progname); |
297 |
> |
if (!strncmp(cp, progname, n) && |
298 |
> |
cp[n++] == ':' && |
299 |
> |
cp[n++] == ' ') { |
300 |
> |
register struct erract *ep; |
301 |
> |
for (ep = erract; ep < erract+NERRS; |
302 |
> |
ep++) |
303 |
> |
if (ep->pre[0] && |
304 |
> |
!strncmp(cp+n, ep->pre, |
305 |
> |
strlen(ep->pre))) { |
306 |
> |
status = ep->ec; |
307 |
> |
break; |
308 |
> |
} |
309 |
> |
} |
310 |
> |
do { /* write message */ |
311 |
> |
if ((n = write(2, cp, nr)) <= 0) |
312 |
> |
goto writerr; |
313 |
> |
cp += n; |
314 |
> |
} while ((nr -= n) > 0); |
315 |
> |
} |
316 |
> |
} |
317 |
> |
/* renderer stdout */ |
318 |
> |
if (fdout >= 0 && (FD_ISSET(fdout, &readfds) || |
319 |
> |
FD_ISSET(fdout, &excepfds))) { |
320 |
> |
nr = read(fdout, cp=buf, sizeof(buf)); |
321 |
> |
if (nr < 0) |
322 |
> |
goto readerr; |
323 |
> |
if (nr == 0) { /* EOF */ |
324 |
> |
close(fdout); |
325 |
> |
close(1); |
326 |
> |
fdout = -1; |
327 |
> |
} else |
328 |
> |
do { /* write it all */ |
329 |
> |
if ((n = write(1, cp, nr)) <= 0) |
330 |
> |
goto writerr; |
331 |
> |
cp += n; |
332 |
> |
} while ((nr -= n) > 0); |
333 |
> |
} |
334 |
|
} |
335 |
< |
fclose(stdin); |
336 |
< |
fclose(stdout); |
337 |
< |
if (pid) /* parent waits for child */ |
185 |
< |
wait(0); |
186 |
< |
exit(0); /* all done, exit (not quit!) */ |
335 |
> |
kill(pid, SIGTERM); /* no more process to feed, so... */ |
336 |
> |
waitpid(pid, 0, 0); /* wait for feeder process */ |
337 |
> |
_exit(status); |
338 |
|
formerr: |
339 |
|
error(USER, "format error in persist file"); |
340 |
+ |
readerr: |
341 |
+ |
error(SYSTEM, "read error in io_process"); |
342 |
+ |
writerr: |
343 |
+ |
error(SYSTEM, "write error in io_process"); |
344 |
|
} |
345 |
+ |
|
346 |
+ |
#else |
347 |
+ |
|
348 |
+ |
extern void pfclean(void) {} |
349 |
+ |
|
350 |
+ |
#endif |