ref: 9ced712a2ad70557a8ceb89ff3b969b92c85f68c
dir: /sys/src/cmd/upas/bayes/addhash.c/
#include <u.h> #include <libc.h> #include <bio.h> #include "regexp.h" #include "hash.h" Hash hash; void usage(void) { fprint(2, "addhash [-o out] file scale [file scale]...\n"); exits("usage"); } 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); }