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/* Copyright (c) 1996 Regents of the University of California */ |
2 |
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|
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#ifndef lint |
2 |
< |
static char SCCSid[] = "$SunId$ LBL"; |
2 |
> |
static const char RCSid[] = "$Id$"; |
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#endif |
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|
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/* |
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* Routines for persistent rtrace and rpict processes. |
6 |
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* |
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* External symbols declared in ray.h |
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*/ |
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#include "copyright.h" |
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|
12 |
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#include <string.h> |
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#include <signal.h> |
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#include <sys/stat.h> |
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|
16 |
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#include "platform.h" |
17 |
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#include "rtprocess.h" /* getpid() */ |
18 |
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#include "standard.h" |
19 |
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#include "random.h" |
20 |
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#include "ray.h" |
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|
22 |
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#ifdef F_SETLKW |
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#include "paths.h" |
24 |
< |
#include <signal.h> |
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#include <sys/types.h> |
17 |
< |
#include <sys/stat.h> |
18 |
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/* select call compatibility stuff */ |
19 |
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#ifndef FD_SETSIZE |
20 |
< |
#include <sys/param.h> |
21 |
< |
#define FD_SETSIZE NOFILE /* maximum # select file descriptors */ |
22 |
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#endif |
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#ifndef FD_SET |
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#ifndef NFDBITS |
25 |
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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))) |
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#define FD_ZERO(p) bzero((char *)(p), sizeof(*(p))) |
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#endif |
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#include "selcall.h" |
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|
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#ifndef TIMELIM |
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#define TIMELIM (8*3600) /* time limit for holding pattern */ |
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#endif |
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|
37 |
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extern char *strcpy(), *index(); |
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|
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extern int headismine; /* boolean true if header belongs to me */ |
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|
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extern char *progname; /* global program name */ |
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|
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extern char *errfile; /* global error file name */ |
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|
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static char *persistfname = NULL; /* persist file name */ |
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static int persistfd = -1; /* persist file descriptor */ |
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|
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static char inpname[TEMPLEN+1], outpname[TEMPLEN+1], errname[TEMPLEN+1]; |
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|
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typedef void (sighandler_t)(int); |
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static sighandler_t sig_io; |
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static sighandler_t sig_alrm; |
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|
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pfdetach() /* release persist (and header) resources */ |
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|
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extern void |
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> |
pfdetach(void) /* release persist (and header) resources */ |
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{ |
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if (persistfd >= 0) |
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close(persistfd); |
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} |
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|
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|
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< |
pfclean() /* clean up persist files */ |
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extern void |
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> |
pfclean(void) /* clean up persist files */ |
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{ |
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if (persistfd >= 0) |
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close(persistfd); |
69 |
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} |
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|
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|
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< |
pflock(lf) /* place or release exclusive lock on file */ |
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< |
int lf; |
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extern void |
73 |
> |
pflock( /* place or release exclusive lock on file */ |
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int lf |
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) |
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{ |
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struct flock fls; |
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} |
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persistfile(pfn) /* open persist file and lock it */ |
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char *pfn; |
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extern void |
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persistfile( /* open persist file and lock it */ |
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char *pfn |
91 |
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) |
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{ |
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persistfd = open(pfn, O_WRONLY|O_CREAT|O_EXCL, 0644); |
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if (persistfd >= 0) { |
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|
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static int got_io; |
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|
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static int sig_io() { got_io++; } |
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> |
static void sig_io(int i) { got_io++; } |
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|
114 |
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static int sig_alrm() { quit(0); } |
114 |
> |
static void sig_alrm(int i) { quit(0); } |
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|
116 |
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|
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pfhold() /* holding pattern for idle rendering process */ |
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extern void |
118 |
> |
pfhold(void) /* holding pattern for idle rendering process */ |
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{ |
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int (*oldalrm)(); |
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> |
sighandler_t *oldalrm; |
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char buf[512]; |
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register int n; |
123 |
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/* close input and output descriptors */ |
126 |
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if (errfile == NULL) |
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close(fileno(stderr)); |
128 |
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/* create named pipes for input and output */ |
129 |
< |
if (mknod(mktemp(strcpy(inpname,TEMPLATE)), S_IFIFO|0600, 0) < 0) |
129 |
> |
if (mkfifo(mktemp(strcpy(inpname,TEMPLATE)), 0600) < 0) |
130 |
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goto createrr; |
131 |
< |
if (mknod(mktemp(strcpy(outpname,TEMPLATE)), S_IFIFO|0600, 0) < 0) |
131 |
> |
if (mkfifo(mktemp(strcpy(outpname,TEMPLATE)), 0600) < 0) |
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goto createrr; |
133 |
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if (errfile == NULL && |
134 |
< |
mknod(mktemp(strcpy(errname,TEMPLATE)), S_IFIFO|0600, 0) < 0) |
134 |
> |
mkfifo(mktemp(strcpy(errname,TEMPLATE)), 0600) < 0) |
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goto createrr; |
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sprintf(buf, "%s %d\n%s\n%s\n%s\n", progname, getpid(), |
137 |
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inpname, outpname, errname); |
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n = strlen(buf); |
139 |
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if (write(persistfd, buf, n) < n) |
140 |
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error(SYSTEM, "error writing persist file"); |
141 |
+ |
lseek(persistfd, (off_t)0, SEEK_SET); |
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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); |
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< |
oldalrm = (int (*)())signal(SIGALRM, sig_alrm); |
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> |
oldalrm = signal(SIGALRM, sig_alrm); |
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alarm(TIMELIM); |
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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 */ |
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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); |
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signal(SIGIO, SIG_DFL); |
153 |
< |
if (lseek(persistfd, 0L, 0) < 0 || ftruncate(persistfd, 0L) < 0) |
156 |
< |
error(SYSTEM, "seek/truncate error on persist file"); |
153 |
> |
pflock(1); /* grab persist file back */ |
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/* someone wants us; reopen stdin and stdout */ |
155 |
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/* |
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if (freopen(inpname, "r", stdin) == NULL) |
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goto openerr; |
158 |
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if (freopen(outpname, "w", stdout) == NULL) |
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goto openerr; |
160 |
+ |
*/ |
161 |
+ |
close(0); |
162 |
+ |
if (open(inpname, O_RDONLY) != 0) |
163 |
+ |
error(INTERNAL, "unexpected stdin file number"); |
164 |
+ |
clearerr(stdin); |
165 |
+ |
close(1); |
166 |
+ |
if (open(outpname, O_WRONLY) != 1) |
167 |
+ |
error(INTERNAL, "unexpected stdout file number"); |
168 |
+ |
sleep(3); /* give them a chance to open their pipes */ |
169 |
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if (errname[0]) { |
170 |
< |
if (freopen(errname, "w", stderr) == NULL) |
171 |
< |
goto openerr; |
170 |
> |
close(2); |
171 |
> |
if (open(errname, O_WRONLY) != 2) |
172 |
> |
error(INTERNAL, "unexpected stderr file number"); |
173 |
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unlink(errname); |
174 |
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errname[0] = '\0'; |
175 |
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} |
185 |
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} |
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|
187 |
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|
188 |
< |
io_process() /* just act as go-between for actual process */ |
188 |
> |
extern void |
189 |
> |
io_process(void) /* just act as go-between for actual process */ |
190 |
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{ |
191 |
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register char *cp; |
192 |
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register int nr, n; |
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char buf[BUFSIZ], *pfin, *pfout, *pferr; |
194 |
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int pid, nfds; |
195 |
< |
int fdin, fdout, fderr = -1; |
196 |
< |
fd_set readfds, writefds, excepfds; |
195 |
> |
int fdout, fderr = -1; |
196 |
> |
int status = 0; |
197 |
> |
fd_set readfds, excepfds; |
198 |
|
/* load persist file */ |
199 |
+ |
n = 40; |
200 |
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while ((nr = read(persistfd, buf, sizeof(buf)-1)) == 0) { |
201 |
+ |
if (!n--) |
202 |
+ |
error(USER, "unattended persist file?"); |
203 |
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pflock(0); |
204 |
< |
sleep(15); /* wait until ready */ |
204 |
> |
sleep(3+(3*getpid()+random())%13); /* wait until ready */ |
205 |
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pflock(1); |
206 |
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} |
194 |
– |
pfdetach(); /* close persist file */ |
207 |
|
if (nr < 0) |
208 |
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error(SYSTEM, "error reading persist file"); |
209 |
< |
buf[nr] = '\0'; |
210 |
< |
if ((cp = index(buf, ' ')) == NULL) |
209 |
> |
#ifndef _WIN32 /* XXX we need a replacement for that one */ |
210 |
> |
ftruncate(persistfd, (off_t)0L); /* truncate persist file */ |
211 |
> |
#endif |
212 |
> |
pfdetach(); /* close & release persist file */ |
213 |
> |
buf[nr] = '\0'; /* parse what we got */ |
214 |
> |
if ((cp = strchr(buf, ' ')) == NULL) |
215 |
|
goto formerr; |
216 |
|
*cp++ = '\0'; |
217 |
|
if ((pid = atoi(cp)) <= 0) |
218 |
|
goto formerr; |
219 |
< |
if ((cp = index(cp, '\n')) == NULL) |
219 |
> |
if ((cp = strchr(cp, '\n')) == NULL) |
220 |
|
goto formerr; |
221 |
|
pfin = ++cp; |
222 |
< |
if ((cp = index(cp, '\n')) == NULL) |
222 |
> |
if ((cp = strchr(cp, '\n')) == NULL) |
223 |
|
goto formerr; |
224 |
|
*cp++ = '\0'; |
225 |
|
pfout = cp; |
226 |
< |
if ((cp = index(cp, '\n')) == NULL) |
226 |
> |
if ((cp = strchr(cp, '\n')) == NULL) |
227 |
|
goto formerr; |
228 |
|
*cp++ = '\0'; |
229 |
|
pferr = cp; |
230 |
< |
if ((cp = index(cp, '\n')) == NULL) |
230 |
> |
if ((cp = strchr(cp, '\n')) == NULL) |
231 |
|
goto formerr; |
232 |
|
*cp++ = '\0'; |
233 |
|
if (cp-buf != nr) |
239 |
|
/* wake up rendering process */ |
240 |
|
if (kill(pid, SIGIO) < 0) |
241 |
|
error(SYSTEM, "cannot signal rendering process in io_process"); |
242 |
< |
/* open named pipes, in order */ |
243 |
< |
if ((fdin = open(pfin, O_WRONLY)) < 0) |
244 |
< |
error(SYSTEM, "cannot open input pipe in io_process"); |
242 |
> |
/* fork child feeder process */ |
243 |
> |
pid = fork(); |
244 |
> |
if (pid < 0) |
245 |
> |
error(SYSTEM, "fork failed in io_process"); |
246 |
> |
if (pid == 0) { /* feeder loop */ |
247 |
> |
int fdin; |
248 |
> |
close(1); /* open input pipe */ |
249 |
> |
if ((fdin = open(pfin, O_WRONLY)) < 0) |
250 |
> |
error(SYSTEM, "cannot open feed pipe in io_process"); |
251 |
> |
/* renderer stdin */ |
252 |
> |
while ((nr = read(0, cp=buf, sizeof(buf))) > 0) { |
253 |
> |
do { |
254 |
> |
if ((n = write(fdin, cp, nr)) <= 0) |
255 |
> |
goto writerr; |
256 |
> |
cp += n; |
257 |
> |
} while ((nr -= n) > 0); |
258 |
> |
} |
259 |
> |
if (nr < 0) |
260 |
> |
goto readerr; |
261 |
> |
_exit(0); |
262 |
> |
} |
263 |
> |
close(0); |
264 |
> |
/* open output pipes, in order */ |
265 |
|
if ((fdout = open(pfout, O_RDONLY)) < 0) |
266 |
|
error(SYSTEM, "cannot open output pipe in io_process"); |
267 |
|
if (pferr[0] && (fderr = open(pferr, O_RDONLY)) < 0) |
268 |
|
error(SYSTEM, "cannot open error pipe in io_process"); |
269 |
< |
for ( ; ; ) { /* loop on select call */ |
269 |
> |
for ( ; ; ) { /* eater loop */ |
270 |
|
FD_ZERO(&readfds); |
235 |
– |
FD_ZERO(&writefds); |
271 |
|
FD_ZERO(&excepfds); |
272 |
|
nfds = 0; |
238 |
– |
if (fdin >= 0) { |
239 |
– |
FD_SET(fdin, &writefds); |
240 |
– |
FD_SET(fdin, &excepfds); |
241 |
– |
nfds = fdin+1; |
242 |
– |
} |
273 |
|
if (fdout >= 0) { |
274 |
|
FD_SET(fdout, &readfds); |
275 |
|
FD_SET(fdout, &excepfds); |
282 |
|
} |
283 |
|
if (nfds == 0) |
284 |
|
break; /* all done, exit */ |
285 |
< |
if (select(nfds, &readfds, &writefds, &excepfds, NULL) < 0) |
285 |
> |
if (select(nfds, &readfds, NULL, &excepfds, NULL) < 0) |
286 |
|
error(SYSTEM, "error in select call in io_process"); |
287 |
|
/* renderer stderr */ |
288 |
|
if (fderr >= 0 && (FD_ISSET(fderr, &readfds) || |
292 |
|
goto readerr; |
293 |
|
if (nr == 0) { |
294 |
|
close(fderr); |
295 |
< |
close(2); |
295 |
> |
/* close(2); don't close stderr! */ |
296 |
|
fderr = -1; |
297 |
< |
} else |
298 |
< |
do { /* write it all */ |
297 |
> |
} else { |
298 |
> |
cp[nr] = '\0'; /* deduce status if we can */ |
299 |
> |
n = strlen(progname); |
300 |
> |
if (!strncmp(cp, progname, n) && |
301 |
> |
cp[n++] == ':' && |
302 |
> |
cp[n++] == ' ') { |
303 |
> |
register struct erract *ep; |
304 |
> |
for (ep = erract; ep < erract+NERRS; |
305 |
> |
ep++) |
306 |
> |
if (ep->pre[0] && |
307 |
> |
!strncmp(cp+n, ep->pre, |
308 |
> |
strlen(ep->pre))) { |
309 |
> |
status = ep->ec; |
310 |
> |
break; |
311 |
> |
} |
312 |
> |
} |
313 |
> |
do { /* write message */ |
314 |
|
if ((n = write(2, cp, nr)) <= 0) |
315 |
|
goto writerr; |
316 |
|
cp += n; |
317 |
|
} while ((nr -= n) > 0); |
318 |
+ |
} |
319 |
|
} |
320 |
|
/* renderer stdout */ |
321 |
|
if (fdout >= 0 && (FD_ISSET(fdout, &readfds) || |
334 |
|
cp += n; |
335 |
|
} while ((nr -= n) > 0); |
336 |
|
} |
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 |
– |
} |
337 |
|
} |
338 |
< |
_exit(0); /* we ought to return renderer error status! */ |
338 |
> |
waitpid(pid, 0, 0); /* wait for feeder process */ |
339 |
> |
_exit(status); |
340 |
|
formerr: |
341 |
|
error(USER, "format error in persist file"); |
342 |
|
readerr: |
347 |
|
|
348 |
|
#else |
349 |
|
|
350 |
< |
pfclean() {} |
350 |
> |
extern void pfclean(void) {} |
351 |
|
|
352 |
|
#endif |