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/* Copyright (c) 1992 Regents of the University of California */ |
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/* Copyright (c) 1993 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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#define MAXFORK 0 |
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#endif |
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#endif |
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/* protection from SYSV signals(!) */ |
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#if defined(sgi) || defined(hpux) |
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#define guard_io() sighold(SIGALRM) |
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#define unguard() sigrelse(SIGALRM) |
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#endif |
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#ifndef guard_io |
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#define guard_io() 0 |
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#define unguard() 0 |
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#endif |
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/* rpict command */ |
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char *rpargv[128] = {"rpict", "-S", "1", "-x", "512", "-y", "512", "-pa", "1"}; |
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int rpargc = 9; |
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nextpiece(xp, yp) /* get next piece assignment */ |
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int *xp, *yp; |
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{ |
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extern char *fgets(); |
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struct flock fls; |
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char buf[64]; |
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putc('\n', torp); |
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fflush(torp); /* assigns piece to rpict */ |
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putpiece(xorg, yorg); /* place piece in output */ |
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if (verbose) { /* notify caller */ |
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printf("%d %d done\n", xorg, yorg); |
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fflush(stdout); |
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} |
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} |
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} |
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exit(cleanup(1)); |
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} |
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/* check header from rpict */ |
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guard_io(); |
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getheader(fromrp, NULL, NULL); |
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if (!fscnresolu(&hr, &vr, fromrp) || hr != hres | vr != vres) { |
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fprintf(stderr, "%s: resolution mismatch from %s\n", |
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progname, rpargv[0]); |
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exit(cleanup(1)); |
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} |
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unguard(); |
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/* load new piece into buffer */ |
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for (y = 0; y < vr; y++) |
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for (y = 0; y < vr; y++) { |
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guard_io(); |
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if (freadcolrs(pbuf+y*hr, hr, fromrp) < 0) { |
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fprintf(stderr, "%s: read error from %s\n", |
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progname, rpargv[0]); |
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exit(cleanup(1)); |
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} |
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unguard(); |
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} |
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#if MAXFORK |
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/* fork so we don't slow rpict down */ |
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if ((pid = fork()) > 0) { |
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#else |
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pid = -1; /* no forking */ |
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#endif |
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fls.l_len = (long)vres*hmult*hres*sizeof(COLR); |
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fls.l_start = scanorig + (vmult-1-ypos)*fls.l_len; |
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fls.l_start = scanorig + |
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((long)(vmult-1-ypos)*vres*hmult+xpos)*hres*sizeof(COLR); |
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#if NFS |
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fls.l_len = ((long)(vres-1)*hmult+1)*hres*sizeof(COLR); |
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/* lock file section so NFS doesn't mess up */ |
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fls.l_whence = 0; |
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fls.l_type = F_WRLCK; |
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fcntl(outfd, F_SETLKW, &fls); |
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#endif |
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/* write new piece to file */ |
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if (lseek(outfd, fls.l_start+(long)xpos*hres*sizeof(COLR), 0) == -1) |
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if (lseek(outfd, fls.l_start, 0) == -1) |
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goto seekerr; |
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if (hmult == 1) { |
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if (writebuf(outfd, (char *)pbuf, |
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1) == -1) |
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goto seekerr; |
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} |
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if (pid == -1) { /* fork failed */ |
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if (verbose) { /* notify caller */ |
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printf("%d %d done\n", xpos, ypos); |
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fflush(stdout); |
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} |
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if (pid == -1) { /* didn't fork or fork failed */ |
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#if NFS |
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fls.l_type = F_UNLCK; /* release lock */ |
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fcntl(outfd, F_SETLKW, &fls); |
