void
main(int argc, char **argv)
{
int i, fd, n;
char err[ERRMAX], *out;
Biobuf *b, bout;
out = nil;
ARGBEGIN{
case 'o':
out = EARGF(usage());
break;
default:
usage();
}ARGEND;
if(argc==0 || argc%2)
usage();
while(argc > 0){
if((b = Bopenlock(argv[0], OREAD)) == nil)
sysfatal("open %s: %r", argv[0]);
n = atoi(argv[1]);
if(n == 0)
sysfatal("0 scale given");
Breadhash(b, &hash, n);
Bterm(b);
argv += 2;
argc -= 2;
}
fd = 1;
if(out){
for(i=0; i<120; i++){
if((fd = create(out, OWRITE, 0666|DMEXCL)) >= 0)
break;
rerrstr(err, sizeof err);
if(strstr(err, "file is locked")==nil && strstr(err, "exclusive lock")==nil)
break;
sleep(1000);
}
if(fd < 0)
sysfatal("could not open %s: %r", out);
}
Binit(&bout, fd, OWRITE);
Bwritehash(&bout, &hash);
Bterm(&bout);
exits(0);
}
Hash*
hread(char *s)
{
Hash *h;
Biobuf *b;
if((b = Bopenlock(s, OREAD)) == nil)
sysfatal("open %s: %r", s);
h = emalloc(sizeof(Hash));
Breadhash(b, h, 1);
Bterm(b);
return h;
}
