clog.c 1000 B

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  1. #include <u.h>
  2. #include <libc.h>
  3. #include <bio.h>
  4. char *argv0;
  5. int
  6. openlog(char *name)
  7. {
  8. int fd;
  9. fd = open(name, OWRITE);
  10. if(fd < 0)
  11. fd = create(name, OWRITE, DMAPPEND|0666);
  12. if(fd < 0){
  13. fprint(2, "%s: can't open %s: %r\n", argv0, name);
  14. return -1;
  15. }
  16. seek(fd, 0, 2);
  17. return fd;
  18. }
  19. void
  20. main(int argc, char **argv)
  21. {
  22. Biobuf in;
  23. int fd;
  24. char *p, *t;
  25. char buf[8192];
  26. argv0 = argv[0];
  27. if(argc < 3){
  28. fprint(2, "usage: %s console logfile \n", argv0);
  29. exits("usage");
  30. }
  31. fd = open(argv[1], OREAD);
  32. if(fd < 0){
  33. fprint(2, "%s: can't open %s: %r\n", argv0, argv[1]);
  34. exits("open");
  35. }
  36. Binit(&in, fd, OREAD);
  37. fd = openlog(argv[2]);
  38. for(;;){
  39. if(p = Brdline(&in, '\n')){
  40. p[Blinelen(&in)-1] = 0;
  41. t = ctime(time(0));
  42. t[19] = 0;
  43. if(fprint(fd, "%s: %s\n", t, p) < 0){
  44. close(fd);
  45. fd = openlog(argv[2]);
  46. fprint(fd, "%s: %s\n", t, p);
  47. }
  48. } else if(Blinelen(&in) == 0) // true eof
  49. break;
  50. else {
  51. Bread(&in, buf, sizeof buf);
  52. }
  53. }
  54. exits(0);
  55. }