3 |
|
#endif |
4 |
|
/* |
5 |
|
* General component matrix combiner, operating on a row at a time. |
6 |
+ |
* |
7 |
+ |
* Multi-processing mode under Unix creates children that each work |
8 |
+ |
* on one input row at a time, fed by the original process. Final conversion |
9 |
+ |
* and output to stdout is sorted by last child while its siblings send it |
10 |
+ |
* their record calculations. |
11 |
|
*/ |
12 |
|
|
8 |
– |
#include <signal.h> |
13 |
|
#include <math.h> |
14 |
|
#include "platform.h" |
15 |
|
#include "rtprocess.h" |
61 |
|
SUBPROC *cproc = NULL; /* child process array */ |
62 |
|
int nchildren = 0; /* # of child processes */ |
63 |
|
int inchild = -1; /* our child ID (-1: parent) */ |
60 |
– |
int pgid = -1; /* process group ID */ |
61 |
– |
int nr_out = 0; /* # of rows output by kids */ |
64 |
|
|
65 |
< |
static int checksymbolic(ROPMAT *rop); |
65 |
> |
extern int checksymbolic(ROPMAT *rop); |
66 |
|
|
67 |
< |
static void |
66 |
< |
on_sigio(int dummy) |
67 |
< |
{ |
68 |
< |
nr_out++; /* happens when child outputs row */ |
69 |
< |
} |
70 |
< |
|
71 |
< |
static int |
67 |
> |
int |
68 |
|
split_input(ROPMAT *rop) |
69 |
|
{ |
70 |
|
if (rop->rmp == &rop->imx && !(rop->rmp = rmx_copy(&rop->imx))) { |
76 |
|
} |
77 |
|
|
78 |
|
/* Check/set transform based on a reference input file */ |
79 |
< |
static int |
79 |
> |
int |
80 |
|
checkreffile(ROPMAT *rop) |
81 |
|
{ |
82 |
|
static const char *curRF = NULL; |
139 |
|
} |
140 |
|
|
141 |
|
/* Compute conversion row from spectrum to one channel of RGB */ |
142 |
< |
static void |
142 |
> |
void |
143 |
|
rgbrow(ROPMAT *rop, int r, int p) |
144 |
|
{ |
145 |
|
const int nc = rop->imx.ncomp; |
156 |
|
} |
157 |
|
|
158 |
|
/* Compute conversion row from spectrum to one channel of XYZ */ |
159 |
< |
static void |
159 |
> |
void |
160 |
|
xyzrow(ROPMAT *rop, int r, int p) |
161 |
|
{ |
162 |
|
const int nc = rop->imx.ncomp; |
173 |
|
} |
174 |
|
|
175 |
|
/* Use the spectral sensitivity function to compute matrix coefficients */ |
176 |
< |
static void |
176 |
> |
void |
177 |
|
sensrow(ROPMAT *rop, int r, double (*sf)(SCOLOR sc, int ncs, const float wlpt[4])) |
178 |
|
{ |
179 |
|
const int nc = rop->imx.ncomp; |
188 |
|
} |
189 |
|
|
190 |
|
/* Check/set symbolic transform */ |
191 |
< |
static int |
191 |
> |
int |
192 |
|
checksymbolic(ROPMAT *rop) |
193 |
|
{ |
194 |
|
const int nc = rop->imx.ncomp; |
302 |
|
return(1); |
303 |
|
} |
304 |
|
|
305 |
< |
static int |
305 |
> |
int |
306 |
|
get_component_xfm(ROPMAT *rop) |
307 |
|
{ |
308 |
|
int i, j; |
385 |
|
return(1); |
386 |
|
} |
387 |
|
|
388 |
< |
static int |
388 |
> |
int |
389 |
|
apply_op(RMATRIX *dst, const RMATRIX *src, const RUNARYOP *ro) |
390 |
|
{ |
391 |
|
if (ro->clen > 0) { |
404 |
|
return(1); |
405 |
|
} |
406 |
|
|
407 |
< |
static int |
407 |
> |
int |
408 |
|
open_input(ROPMAT *rop) |
409 |
|
{ |
410 |
|
int outtype; |
426 |
|
} |
427 |
|
|
428 |
|
/* Return nominal wavelength associated with input component (return nm) */ |
429 |
< |
static double |
429 |
> |
double |
430 |
|
l_wavelength(char *nam) |
431 |
|
{ |
432 |
|
double comp = argument(1); |
450 |
|
} |
451 |
|
|
452 |
|
/* Return ith input with optional channel selector */ |
453 |
< |
static double |
453 |
> |
double |
454 |
|
l_chanin(char *nam) |
455 |
|
{ |
456 |
|
double inp = argument(1); |
475 |
|
return(mop[mi].rmp->mtx[cur_col*in_ncomp + chan]); |
476 |
|
} |
477 |
|
|
478 |
< |
static int |
478 |
> |
int |
479 |
|
initialize(RMATRIX *imp) |
480 |
|
{ |
481 |
|
int i; |
522 |
|
return(1); |
523 |
|
} |
524 |
|
|
525 |
< |
static void |
525 |
> |
void |
526 |
|
output_headinfo(FILE *fp) |
527 |
|
{ |
528 |
|
int i; |
545 |
|
} |
546 |
|
} |
547 |
|
|
548 |
< |
static int |
548 |
> |
int |
549 |
|
spawned_children(int np) |
550 |
|
{ |
551 |
|
int i, rv; |
556 |
|
np = 1; |
557 |
|
} else |
558 |
|
#endif |
559 |
< |
if ((in_nrows > 0) & (np > in_nrows)) |
560 |
< |
np = in_nrows; |
559 |
> |
if ((in_nrows > 0) & (np*4 > in_nrows)) |
560 |
> |
np = in_nrows/4; |
561 |
|
/* we'll be doing a row at a time */ |
562 |
|
for (i = 0; i < nmats; i++) { |
563 |
|
mop[i].imx.nrows = 1; |
569 |
|
goto memerror; |
570 |
|
} |
571 |
|
} |
572 |
< |
/* prep output row buffer */ |
573 |
< |
if (mcat || mop[nmats].preop.clen > 0) { |
572 |
> |
/* prep output row buffer(s) */ |
573 |
> |
if (mop[nmats].preop.clen > 0) { |
574 |
|
if (!split_input(&mop[nmats])) /* need separate buffer */ |
579 |
– |
return(0); |
580 |
– |
if (mop[nmats].preop.clen > 0) |
581 |
– |
mop[nmats].rmp->ncomp = mop[nmats].preop.clen / |
582 |
– |
mop[nmats].imx.ncomp; |
583 |
– |
mop[nmats].rmp->nrows = 1; |
584 |
– |
if (!mcat | !mcat_last && !rmx_prepare(mop[nmats].rmp)) |
575 |
|
goto memerror; |
576 |
+ |
mop[nmats].rmp->ncomp = mop[nmats].preop.clen / |
577 |
+ |
mop[nmats].imx.ncomp; |
578 |
|
} |
579 |
|
mop[nmats].imx.nrows = 1; |
580 |
|
if (!rmx_prepare(&mop[nmats].imx)) |
581 |
|
goto memerror; |
582 |
< |
if (np <= 1) { /* single process return point */ |
582 |
> |
if (mop[nmats].rmp != &mop[nmats].imx) { |
583 |
> |
mop[nmats].rmp->nrows = 1; |
584 |
> |
if (!rmx_prepare(mop[nmats].rmp)) |
585 |
> |
goto memerror; |
586 |
> |
} |
587 |
> |
if (np <= 1) { /* single process return */ |
588 |
|
#ifdef getc_unlocked |
589 |
|
for (i = 0; i < nmats; i++) |
590 |
|
flockfile(mop[i].infp); |
592 |
|
#endif |
593 |
|
return(0); |
594 |
|
} |
598 |
– |
pgid = setpgrp(); /* set process group ID */ |
599 |
– |
signal(SIGIO, on_sigio); |
595 |
|
fflush(stdout); /* flush header & spawn children */ |
596 |
< |
cproc = (SUBPROC *)malloc(sizeof(SUBPROC)*np); |
596 |
> |
nchildren = np + 1; /* extra child to sequence output */ |
597 |
> |
cproc = (SUBPROC *)malloc(sizeof(SUBPROC)*nchildren); |
598 |
|
if (!cproc) |
599 |
|
goto memerror; |
600 |
< |
nchildren = np; |
601 |
< |
for (i = 0; i < np; i++) { |
602 |
< |
cproc[i].flags = PF_FILT_OUT; |
603 |
< |
cproc[i].w = dup(1); |
604 |
< |
cproc[i].r = 0; |
605 |
< |
cproc[i].pid = -1; |
610 |
< |
rv = open_process(&cproc[i], NULL); |
611 |
< |
if (rv <= 0) break; |
612 |
< |
} |
613 |
< |
if (rv > 0) |
614 |
< |
return(1); /* parent return value */ |
600 |
> |
for (i = nchildren; i--; ) cproc[i] = sp_inactive; |
601 |
> |
cproc[nchildren-1].flags |= PF_FILT_OUT; |
602 |
> |
/* start each child from parent */ |
603 |
> |
for (i = 0; i < nchildren; i++) |
604 |
> |
if ((rv = open_process(&cproc[i], NULL)) <= 0) |
605 |
> |
break; /* child breaks here */ |
606 |
|
if (rv < 0) { |
607 |
< |
perror("fork"); |
607 |
> |
perror("fork"); /* WTH? */ |
608 |
> |
close_processes(cproc, i); |
609 |
|
exit(1); |
610 |
|
} |
611 |
< |
inchild = i; /* our child index */ |
612 |
< |
while (i-- > 0) /* don't share siblings' pipes */ |
611 |
> |
if (i != nchildren-1) { /* last child is sole reader */ |
612 |
> |
int j = i; |
613 |
> |
while (j-- > 0) { |
614 |
> |
close(cproc[j].r); |
615 |
> |
cproc[j].r = -1; |
616 |
> |
} |
617 |
> |
} |
618 |
> |
if (rv > 0) |
619 |
> |
return(1); /* parent return value */ |
620 |
> |
|
621 |
> |
inchild = i; /* else set our child index */ |
622 |
> |
while (i-- > 0) /* only parent writes siblings */ |
623 |
|
close(cproc[i].w); |
624 |
< |
fpurge(stdin); /* discard previous matrix input */ |
624 |
> |
|
625 |
> |
i = nmats; /* close matrix streams (carefully) */ |
626 |
> |
while (i-- > 0) { |
627 |
> |
if (mop[i].infp != stdin) { |
628 |
> |
close(fileno(mop[i].infp)); /* avoid lseek() */ |
629 |
> |
fclose(mop[i].infp); /* ! pclose() */ |
630 |
> |
} |
631 |
> |
mop[i].infp = NULL; |
632 |
> |
} |
633 |
> |
fpurge(stdin); /* discard previously buffered input */ |
634 |
> |
|
635 |
> |
if (inchild == nchildren-1) |
636 |
> |
return(-1); /* output process return value */ |
637 |
> |
|
638 |
> |
i = nmats; /* get matrix rows from parent */ |
639 |
> |
while (i-- > 0) { |
640 |
> |
mop[i].infp = stdin; |
641 |
> |
mop[i].imx.dtype = DTrmx_native; |
642 |
> |
mop[i].imx.pflags &= ~RMF_SWAPIN; |
643 |
> |
} |
644 |
|
#ifdef getc_unlocked |
645 |
|
flockfile(stdin); |
646 |
|
#endif |
647 |
< |
for (i = 0; i < nmats; i++) { |
648 |
< |
if (mop[i].infp != stdin) |
628 |
< |
fclose(mop[i].infp); /* ! pclose() */ |
629 |
< |
mop[i].infp = stdin; |
630 |
< |
mop[i].imx.dtype = DTdouble; |
631 |
< |
} |
632 |
< |
return(0); /* child return */ |
647 |
> |
mop[nmats].rmp->dtype = DTrmx_native; |
648 |
> |
return(0); /* worker child return value */ |
649 |
|
memerror: |
650 |
|
fputs("Out of memory in spawned_children()\n", stderr); |
651 |
|
exit(1); |
652 |
|
} |
653 |
|
|
654 |
< |
static int |
655 |
< |
parent_loop() |
654 |
> |
int |
655 |
> |
parent_loop(void) |
656 |
|
{ |
641 |
– |
FILE **outfp = (FILE **)malloc(nchildren*sizeof(FILE *)); |
657 |
|
int i; |
658 |
|
|
659 |
< |
if (!outfp) goto memerror; |
660 |
< |
for (i = 0; i < nchildren; i++) { |
661 |
< |
outfp[i] = fdopen(cproc[i].w, "w"); |
662 |
< |
if (!outfp[i]) goto memerror; |
648 |
< |
#ifdef getc_unlocked |
649 |
< |
flockfile(outfp[i]); |
650 |
< |
#endif |
659 |
> |
rmx_reset(&mop[nmats].imx); /* not touching output side */ |
660 |
> |
if (mop[nmats].rmp != &mop[nmats].imx) { |
661 |
> |
rmx_free(mop[nmats].rmp); |
662 |
> |
mop[nmats].rmp = &mop[nmats].imx; |
663 |
|
} |
664 |
|
#ifdef getc_unlocked |
665 |
< |
for (i = 0; i < nmats; i++) |
665 |
> |
for (i = 0; i < nmats; i++) /* we handle matrix inputs */ |
666 |
|
flockfile(mop[i].infp); |
667 |
|
#endif |
668 |
+ |
/* load & send rows to kids */ |
669 |
|
for (cur_row = 0; (in_nrows <= 0) | (cur_row < in_nrows); cur_row++) { |
670 |
< |
FILE *ofp = outfp[cur_row % nchildren]; |
670 |
> |
int wfd = cproc[cur_row % (nchildren-1)].w; |
671 |
|
for (i = 0; i < nmats; i++) |
672 |
|
if (!rmx_load_row(mop[i].imx.mtx, &mop[i].imx, mop[i].infp)) { |
673 |
|
if (cur_row > in_nrows) /* unknown #input rows? */ |
674 |
|
break; |
675 |
< |
fprintf(stderr, "%s: read error at row %d\n", |
675 |
> |
fprintf(stderr, "%s: parent_loop() load error at row %d\n", |
676 |
|
mop[i].inspec, cur_row); |
677 |
|
return(0); |
678 |
|
} |
679 |
|
if (i < nmats) |
680 |
|
break; |
681 |
|
for (i = 0; i < nmats; i++) |
682 |
< |
if (!rmx_write_data(mop[i].imx.mtx, mop[i].imx.ncomp, |
683 |
< |
mop[i].imx.ncols, DTdouble, ofp)) |
684 |
< |
return(0); |
685 |
< |
if (fflush(ofp) == EOF) |
686 |
< |
return(0); |
682 |
> |
if (writebuf(wfd, mop[i].imx.mtx, rmx_array_size(&mop[i].imx)) |
683 |
> |
!= rmx_array_size(&mop[i].imx)) { |
684 |
> |
fprintf(stderr, "%s: parent_loop() write error at row %d\n", |
685 |
> |
mop[i].inspec, cur_row); |
686 |
> |
return(0); |
687 |
> |
} |
688 |
|
} |
689 |
< |
for (i = 0; i < nchildren; i++) |
690 |
< |
fclose(outfp[i]); |
677 |
< |
free(outfp); |
678 |
< |
i = close_processes(cproc, nchildren); |
679 |
< |
free(cproc); cproc = NULL; |
689 |
> |
i = close_processes(cproc, nchildren); /* collect family */ |
690 |
> |
free(cproc); cproc = NULL; nchildren = 0; |
691 |
|
if (i < 0) { |
692 |
< |
fputs("Warning: missing child in parent_loop()\n", stderr); |
692 |
> |
fputs("Warning: lost child in parent_loop()\n", stderr); |
693 |
|
return(1); |
694 |
|
} |
695 |
|
if (i > 0) { |
696 |
|
fprintf(stderr, "Child exited with status %d\n", i); |
697 |
|
return(0); |
698 |
|
} |
699 |
< |
return(1); |
689 |
< |
memerror: |
690 |
< |
fputs("Out of memory in parent_loop()\n", stderr); |
691 |
< |
exit(1); |
699 |
> |
return(1); /* return success! */ |
700 |
|
} |
701 |
|
|
702 |
< |
static int |
703 |
< |
combine_input() |
702 |
> |
int |
703 |
> |
combine_input(void) |
704 |
|
{ |
705 |
|
const int row0 = (inchild >= 0)*inchild; |
706 |
< |
const int rstep = nchildren + !nchildren; |
706 |
> |
const int rstep = nchildren ? nchildren-1 : 1; |
707 |
|
ROPMAT *res = &mop[nmats]; |
708 |
|
int set_r, set_c; |
709 |
|
RMATRIX *tmp = NULL; |
710 |
|
int co_set; |
703 |
– |
sigset_t iomask; |
711 |
|
int i; |
712 |
|
|
713 |
< |
if (mcat && mcat_last && |
714 |
< |
!(tmp = rmx_alloc(1, res->imx.ncols, res->rmp->ncomp))) |
715 |
< |
goto memerror; |
713 |
> |
if (mcat_last && !(tmp = rmx_alloc(1, res->imx.ncols, res->rmp->ncomp))) { |
714 |
> |
fputs("Out of buffer space in combine_input()\n", stderr); |
715 |
> |
return(0); |
716 |
> |
} |
717 |
|
/* figure out what the user set */ |
718 |
|
co_set = fundefined("co"); |
719 |
|
if (!co_set) |
728 |
|
set_c = varlookup("c") != NULL && !vardefined("c"); |
729 |
|
} else /* save a little time */ |
730 |
|
set_r = set_c = 0; |
731 |
< |
|
724 |
< |
sigemptyset(&iomask); /* read/process row-by-row */ |
725 |
< |
sigaddset(&iomask, SIGIO); |
731 |
> |
/* read/process row-by-row */ |
732 |
|
for (cur_row = row0; (in_nrows <= 0) | (cur_row < in_nrows); cur_row += rstep) { |
733 |
|
RMATRIX *mres = NULL; |
728 |
– |
if (inchild >= 0) sigprocmask(SIG_BLOCK, &iomask, NULL); |
734 |
|
for (i = 0; i < nmats; i++) |
735 |
|
if (!rmx_load_row(mop[i].imx.mtx, &mop[i].imx, mop[i].infp)) { |
736 |
|
if (cur_row > in_nrows) /* unknown #input rows? */ |
737 |
|
break; |
738 |
< |
fprintf(stderr, "%s: read error at row %d\n", |
738 |
> |
fprintf(stderr, "%s: combine_input() load error at row %d\n", |
739 |
|
mop[i].inspec, cur_row); |
740 |
|
return(0); |
741 |
|
} |
737 |
– |
if (inchild >= 0) sigprocmask(SIG_UNBLOCK, &iomask, NULL); |
742 |
|
if (i < nmats) |
743 |
|
break; |
744 |
|
for (i = 0; i < nmats; i++) |
780 |
|
return(0); |
781 |
|
} |
782 |
|
rmx_free(mres); mres = NULL; |
779 |
– |
if (inchild >= 0) { /* children share stdout */ |
780 |
– |
while (nr_out < cur_row) |
781 |
– |
pause(); /* wait for our turn */ |
782 |
– |
sigprocmask(SIG_BLOCK, &iomask, NULL); |
783 |
– |
} |
783 |
|
if (!rmx_write_data(res->rmp->mtx, res->rmp->ncomp, |
784 |
< |
res->rmp->ncols, res->rmp->dtype, stdout)) |
784 |
> |
res->rmp->ncols, res->rmp->dtype, stdout) || |
785 |
> |
(inchild >= 0 && fflush(stdout) == EOF)) { |
786 |
> |
fprintf(stderr, "Conversion/write error at row %d in combine_input()\n", |
787 |
> |
cur_row); |
788 |
|
return(0); |
787 |
– |
if (inchild >= 0) { /* flush and notify group */ |
788 |
– |
if (fflush(stdout) == EOF) |
789 |
– |
return(0); |
790 |
– |
sigprocmask(SIG_UNBLOCK, &iomask, NULL); |
791 |
– |
killpg(pgid, SIGIO); /* increments everyone's nr_out */ |
789 |
|
} |
790 |
|
} |
791 |
|
return(inchild >= 0 || fflush(stdout) != EOF); |
795 |
– |
memerror: |
796 |
– |
fputs("Out of buffer space in combine_input()\n", stderr); |
797 |
– |
return(0); |
792 |
|
multerror: |
793 |
|
fputs("Unexpected matrix multiply error in combine_input()\n", stderr); |
794 |
|
return(0); |
795 |
|
} |
796 |
|
|
797 |
< |
static int |
797 |
> |
int |
798 |
> |
output_loop(void) |
799 |
> |
{ |
800 |
> |
const size_t row_size = rmx_array_size(mop[nmats].rmp); |
801 |
> |
int cur_child = 0; |
802 |
> |
int i = nmats; |
803 |
> |
|
804 |
> |
while (i-- > 0) { /* free input buffers */ |
805 |
> |
rmx_reset(&mop[i].imx); |
806 |
> |
if (mop[i].rmp != &mop[i].imx) { |
807 |
> |
rmx_free(mop[i].rmp); |
808 |
> |
mop[i].rmp = &mop[i].imx; |
809 |
> |
} |
810 |
> |
} |
811 |
> |
if (mop[nmats].rmp != &mop[nmats].imx) /* output is split? */ |
812 |
> |
rmx_reset(&mop[nmats].imx); |
813 |
> |
#ifdef getc_unlocked |
814 |
> |
flockfile(stdout); /* we own this, now */ |
815 |
> |
#endif |
816 |
> |
for ( ; ; ) { /* loop until no more */ |
817 |
> |
ssize_t rv; |
818 |
> |
rv = readbuf(cproc[cur_child].r, mop[nmats].rmp->mtx, row_size); |
819 |
> |
if (!rv) /* out of rows? */ |
820 |
> |
break; |
821 |
> |
if (rv != row_size) { |
822 |
> |
fputs("Read error in output_loop()\n", stderr); |
823 |
> |
return(0); |
824 |
> |
} /* do final conversion */ |
825 |
> |
if (!rmx_write_data(mop[nmats].rmp->mtx, mop[nmats].rmp->ncomp, |
826 |
> |
mop[nmats].rmp->ncols, mop[nmats].rmp->dtype, stdout)) { |
827 |
> |
fputs("Conversion/write error in output_loop()\n", stderr); |
828 |
> |
return(0); |
829 |
> |
} |
830 |
> |
cur_child++; |
831 |
> |
cur_child *= (cur_child < inchild); /* loop over workers */ |
832 |
> |
} |
833 |
> |
return(fflush(stdout) != EOF); |
834 |
> |
} |
835 |
> |
|
836 |
> |
int |
837 |
|
get_factors(double da[], int n, char *av[]) |
838 |
|
{ |
839 |
|
int ac; |
843 |
|
return(ac); |
844 |
|
} |
845 |
|
|
846 |
< |
static void |
846 |
> |
void |
847 |
|
resize_inparr(int n2alloc) |
848 |
|
{ |
849 |
|
int i; |
945 |
|
} |
946 |
|
break; |
947 |
|
case 'C': |
948 |
+ |
mcat_last = 0; |
949 |
|
if (!n || isflt(argv[i+1])) |
950 |
|
goto userr; |
951 |
|
defCsym = mop[nmats].preop.csym = argv[++i]; |
952 |
|
mop[nmats].preop.clen = 0; |
919 |
– |
mcat_last = 0; |
953 |
|
break; |
954 |
|
case 'c': |
955 |
+ |
mcat_last = 0; |
956 |
|
if (n && !isflt(argv[i+1])) { |
957 |
|
mop[nmats].preop.csym = argv[++i]; |
958 |
|
mop[nmats].preop.clen = 0; |
925 |
– |
mcat_last = 0; |
959 |
|
break; |
960 |
|
} |
961 |
|
if (n > MAXCOMP*MAXCOMP) n = MAXCOMP*MAXCOMP; |
968 |
|
goto userr; |
969 |
|
} |
970 |
|
mop[nmats].preop.csym = NULL; |
938 |
– |
mcat_last = 0; |
971 |
|
break; |
972 |
|
case 'm': |
973 |
+ |
mcat_last = 1; |
974 |
|
if (!n) goto userr; |
975 |
|
if (argv[++i][0] == '-' && !argv[i][1]) { |
976 |
|
if (stdin_used++) goto stdin_error; |
977 |
|
mcat_spec = stdin_name; |
978 |
|
} else |
979 |
|
mcat_spec = argv[i]; |
947 |
– |
mcat_last = 1; |
980 |
|
break; |
981 |
|
default: |
982 |
|
fprintf(stderr, "%s: unknown option '%s'\n", |
1045 |
|
return(1); |
1046 |
|
} |
1047 |
|
doptimize(1); /* optimize definitions */ |
1048 |
< |
if (spawned_children(nproc)) /* running in parent process? */ |
1048 |
> |
i = spawned_children(nproc); /* create multiple processes if requested */ |
1049 |
> |
if (i > 0) /* running in parent process? */ |
1050 |
|
return(parent_loop() ? 0 : 1); |
1051 |
< |
/* process & write rows */ |
1051 |
> |
if (i < 0) /* running in output process? */ |
1052 |
> |
return(output_loop() ? 0 : 1); |
1053 |
> |
/* else we are a worker process */ |
1054 |
|
return(combine_input() ? 0 : 1); |
1055 |
|
stdin_error: |
1056 |
|
fprintf(stderr, "%s: %s used for more than one input\n", |