pattern            11 user/grep.c    grep(char *pattern, int fd)
pattern            23 user/grep.c          if(match(pattern, p)){
pattern            40 user/grep.c      char *pattern;
pattern            46 user/grep.c      pattern = argv[1];
pattern            49 user/grep.c        grep(pattern, 0);
pattern            58 user/grep.c        grep(pattern, fd);