| 15 |
|
#include "view.h" |
| 16 |
|
#include "resolu.h" |
| 17 |
|
|
| 18 |
+ |
#ifndef NFS |
| 19 |
+ |
#define NFS 1 |
| 20 |
+ |
#endif |
| 21 |
|
/* set the following to 0 to forgo forking */ |
| 22 |
|
#ifndef MAXFORK |
| 23 |
+ |
#if NFS |
| 24 |
|
#define MAXFORK 3 /* allotment of duped processes */ |
| 25 |
+ |
#else |
| 26 |
+ |
#define MAXFORK 0 |
| 27 |
|
#endif |
| 28 |
+ |
#endif |
| 29 |
|
|
| 30 |
|
/* rpict command */ |
| 31 |
|
char *rpargv[128] = {"rpict", "-S", "1", "-x", "512", "-y", "512", "-pa", "1"}; |
| 186 |
|
scanorig = ftell(fp); /* record position of first scanline */ |
| 187 |
|
if (fclose(fp) == -1) /* done with stream i/o */ |
| 188 |
|
goto filerr; |
| 189 |
+ |
#if NFS |
| 190 |
|
sync(); /* flush NFS buffers */ |
| 191 |
+ |
#endif |
| 192 |
|
/* start rpict process */ |
| 193 |
|
if (open_process(rpd, rpargv) <= 0) { |
| 194 |
|
fprintf(stderr, "%s: cannot start %s\n", progname, rpargv[0]); |
| 361 |
|
#else |
| 362 |
|
pid = -1; /* no forking */ |
| 363 |
|
#endif |
| 364 |
+ |
#if NFS |
| 365 |
|
/* lock file section so NFS doesn't mess up */ |
| 366 |
|
fls.l_whence = 0; |
| 367 |
|
fls.l_len = (long)vres*hmult*hres*sizeof(COLR); |
| 368 |
|
fls.l_start = scanorig + (vmult-1-ypos)*fls.l_len; |
| 369 |
|
fls.l_type = F_WRLCK; |
| 370 |
|
fcntl(outfd, F_SETLKW, &fls); |
| 371 |
+ |
#endif |
| 372 |
|
/* write new piece to file */ |
| 373 |
|
if (lseek(outfd, fls.l_start+(long)xpos*hres*sizeof(COLR), 0) == -1) |
| 374 |
|
goto seekerr; |
| 387 |
|
goto seekerr; |
| 388 |
|
} |
| 389 |
|
if (pid == -1) { /* fork failed */ |
| 390 |
+ |
#if NFS |
| 391 |
|
fls.l_type = F_UNLCK; /* release lock */ |
| 392 |
|
fcntl(outfd, F_SETLKW, &fls); |
| 393 |
+ |
#endif |
| 394 |
|
return(0); |
| 395 |
|
} |
| 396 |
|
_exit(0); /* else exit child process (releasing lock) */ |
