| 400 |
|
|
| 401 |
|
#else |
| 402 |
|
|
| 403 |
– |
#include <fcntl.h> |
| 403 |
|
#include <sys/types.h> |
| 404 |
|
#include <sys/stat.h> |
| 405 |
|
|
| 409 |
|
static FILE *ambinp = NULL; |
| 410 |
|
struct flock fls; |
| 411 |
|
struct stat sts; |
| 412 |
+ |
#define flen sts.st_size |
| 413 |
|
AMBVAL avs; |
| 414 |
< |
long lastpos, flen; |
| 414 |
> |
long lastpos; |
| 415 |
|
register int n; |
| 416 |
|
/* gain exclusive access */ |
| 417 |
|
fls.l_type = F_WRLCK; |
| 424 |
|
lastpos = lseek(fileno(ambfp), 0L, 1); /* get previous position */ |
| 425 |
|
if (fstat(fileno(ambfp), &sts) < 0) /* get current length */ |
| 426 |
|
error(SYSTEM, "cannot stat ambient file"); |
| 427 |
– |
flen = sts.st_size; |
| 427 |
|
if (n = (flen - lastpos)/AMBVALSIZ) { /* file has grown */ |
| 428 |
< |
if (ambinp == NULL) /* use duplicate file */ |
| 428 |
> |
if (ambinp == NULL) { /* use duplicate file */ |
| 429 |
|
ambinp = fdopen(dup(fileno(ambfp)), "r"); |
| 430 |
+ |
if (ambinp == NULL) |
| 431 |
+ |
error(SYSTEM, "fdopen failed in ambsync"); |
| 432 |
+ |
} |
| 433 |
|
while (n--) { /* load contributed values */ |
| 434 |
|
readambval(&avs, ambinp); |
| 435 |
|
avinsert(&avs,&atrunk,thescene.cuorg,thescene.cusize); |
