| 1 | #include <unistd.h> |
| 2 | #include <stdlib.h> |
| 3 | #include <stdio.h> |
| 4 | |
| 5 | #include <dirent.h> |
| 6 | #include <errno.h> |
| 7 | |
| 8 | #include <bsd/string.h> |
| 9 | #include <sys/stat.h> |
| 10 | #include <sys/inotify.h> |
| 11 | |
| 12 | int main(int argc, char *argv[]) { |
| 13 | |
| 14 | char *lex_path, *u_inp, *ful_p, *ev_buf, *parse_buf; |
| 15 | DIR *path; |
| 16 | struct dirent *dent; |
| 17 | struct inotify_event *event; |
| 18 | int inotify_fd, watch_fd, rbts; |
| 19 | |
| 20 | extern int errno; |
| 21 | |
| 22 | lex_path = (char *) calloc(1, NAME_MAX + 1); |
| 23 | |
| 24 | if(argc == 1) |
| 25 | lex_path = "./"; |
| 26 | |
| 27 | else if(argc == 2) |
| 28 | strlcpy(lex_path, argv[1], NAME_MAX + 1); |
| 29 | |
| 30 | else { |
| 31 | |
| 32 | printf("inappropriate number of args.\n"); |
| 33 | return 1; |
| 34 | } |
| 35 | |
| 36 | if(!(path = opendir(lex_path))) { |
| 37 | |
| 38 | if(errno == EACCES) |
| 39 | printf("improper permissions to read dir.\n"); |
| 40 | |
| 41 | else if(errno == ENOENT) |
| 42 | printf("given directory does not exist.\n"); |
| 43 | |
| 44 | else if(errno == ENFILE) |
| 45 | printf("we're out of fd's.\n"); |
| 46 | |
| 47 | else if(errno == ENOTDIR) |
| 48 | printf("argument is not a directory.\n"); |
| 49 | |
| 50 | else |
| 51 | printf("an unspecified error occurred.\n"); |
| 52 | |
| 53 | return errno; |
| 54 | } |
| 55 | |
| 56 | u_inp = (char *) calloc(1, NAME_MAX); |
| 57 | ful_p = (char *) calloc(1, 8192); /* PATH_MAX workaround */ |
| 58 | |
| 59 | while(dent) |
| 60 | if((dent = readdir(path)) != NULL) |
| 61 | printf("%s\n", dent->d_name); |
| 62 | |
| 63 | closedir(path); |
| 64 | |
| 65 | printf("file to watch :: "); |
| 66 | |
| 67 | fgets(u_inp, NAME_MAX, stdin); |
| 68 | strtok(u_inp, "\n"); /* trim newline */ |
| 69 | |
| 70 | strlcat(ful_p, lex_path, 8192); |
| 71 | strlcat(ful_p, "/", NAME_MAX + 1); |
| 72 | strlcat(ful_p, u_inp, 8192); |
| 73 | |
| 74 | if(!(inotify_fd = inotify_init())) { |
| 75 | |
| 76 | printf("could not access inotify api\n"); |
| 77 | exit(1); |
| 78 | } |
| 79 | |
| 80 | if((watch_fd = inotify_add_watch(inotify_fd, ful_p, IN_ACCESS | IN_MODIFY)) == -1) { |
| 81 | |
| 82 | printf("could not open watch on provided file\n"); |
| 83 | exit(1); |
| 84 | } |
| 85 | |
| 86 | ev_buf = (char *) calloc(1, 8192); |
| 87 | parse_buf = (char *) calloc(1, 8192); |
| 88 | |
| 89 | for(;;) { |
| 90 | |
| 91 | rbts = read(inotify_fd, ev_buf, 8192); |
| 92 | |
| 93 | for(parse_buf = ev_buf; parse_buf < ev_buf + rbts;) { |
| 94 | |
| 95 | event = (struct inotify_event*) ev_buf; |
| 96 | |
| 97 | if(event->mask == 0x1) |
| 98 | printf("file was read\n"); |
| 99 | else |
| 100 | printf("file was written\n"); |
| 101 | |
| 102 | parse_buf += sizeof(struct inotify_event) + event-> len; |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | free(u_inp); |
| 107 | free(ful_p); |
| 108 | free(lex_path); |
| 109 | free(ev_buf); |
| 110 | free(parse_buf); |
| 111 | |
| 112 | return 0; |
| 113 | } |