Mercurial > hg > rlgwebd
annotate watcher.c @ 158:9961a538c00e
rlgwebd.js: get rid of numerical game identifiers.
Games will be indentified by gamename/username pairs. This will allow
better interoperability with dgamelaunch.
Polling clients are no longer supported; the code remnants need to be
removed. The reaper() function will likely crash. Unexpectedly, the
WebSocket client still works well enough to play. Watching and listing
current games are probably broken.
author | John "Elwin" Edwards |
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date | Thu, 01 Jan 2015 15:56:22 -0500 |
parents | 245a2959f504 |
children | 66fef65c34e7 |
rev | line source |
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1 #include <stdio.h> |
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2 #include <stdlib.h> |
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3 #include <string.h> |
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4 #include <sys/inotify.h> |
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5 #include <sys/select.h> |
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6 #include <unistd.h> |
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7 #include <limits.h> |
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8 #include <dirent.h> |
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9 |
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10 struct watchdir { |
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11 int wd; |
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12 char *name; |
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13 }; |
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14 |
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15 char ibuf[sizeof(struct inotify_event) + NAME_MAX + 1]; |
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16 |
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17 int startwatch(int ifd, char *dir, struct watchdir *w) { |
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18 DIR *dstream; |
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19 struct dirent *ent; |
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20 |
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21 w->name = dir; |
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22 w->wd = inotify_add_watch(ifd, dir, IN_CREATE|IN_DELETE|IN_DELETE_SELF); |
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23 if (w->wd < 0) { |
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24 fprintf(stderr, "Could not watch %s\n", dir); |
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25 return 1; |
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26 } |
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27 dstream = opendir(dir); |
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28 if (dstream == NULL) { |
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29 fprintf(stderr, "%s is not a readable directory\n", dir); |
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30 inotify_rm_watch(ifd, w->wd); |
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31 w->wd = -1; |
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32 return 1; |
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33 } |
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34 ent = readdir(dstream); |
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35 while (ent != NULL) { |
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36 if (strcmp(ent->d_name, ".") && strcmp(ent->d_name, "..")) |
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37 printf("E %s/%s\n", dir, ent->d_name); |
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38 ent = readdir(dstream); |
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39 } |
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40 closedir(dstream); |
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41 fflush(stdout); |
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42 return 0; |
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43 } |
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44 |
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45 int main(int argc, char *argv[]) { |
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46 int ifd, rsize, off, done, nwatchers, i; |
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47 char typecode; |
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48 struct inotify_event *iev; |
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49 fd_set rfds; |
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50 struct watchdir *watchers; |
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51 |
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52 done = 0; |
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53 nwatchers = argc - 1; |
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54 iev = (struct inotify_event *) ibuf; |
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55 ifd = inotify_init(); |
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56 if (nwatchers == 0) { |
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57 watchers = malloc(sizeof(struct watchdir)); |
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58 nwatchers = 1; |
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59 startwatch(ifd, ".", watchers); |
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60 } |
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61 else { |
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62 watchers = malloc(nwatchers * sizeof(struct watchdir)); |
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63 for (i = 0; i < nwatchers; i++) { |
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64 startwatch(ifd, argv[i+1], watchers + i); |
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65 } |
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66 } |
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67 |
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68 while (!done) { |
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69 FD_ZERO(&rfds); |
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70 FD_SET(0, &rfds); |
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71 FD_SET(ifd, &rfds); |
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72 select(ifd + 1, &rfds, NULL, NULL, NULL); |
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73 if (FD_ISSET(ifd, &rfds)) { |
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74 off = 0; |
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75 rsize = read(ifd, ibuf, sizeof(struct inotify_event) + NAME_MAX + 1); |
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76 while (off < rsize) { |
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77 iev = (struct inotify_event *) (ibuf + off); |
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78 if (iev->mask & IN_CREATE) |
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79 typecode = 'C'; |
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80 else if (iev->mask & IN_DELETE) |
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81 typecode = 'D'; |
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82 else |
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83 typecode = '?'; |
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84 for (i = 0; i < nwatchers; i++) { |
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85 if (watchers[i].wd == iev->wd) |
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86 printf("%c %s/%s\n", typecode, watchers[i].name, iev->name); |
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87 } |
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88 off += sizeof(struct inotify_event) + iev->len; |
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89 } |
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90 fflush(stdout); |
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91 } |
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92 if (FD_ISSET(0, &rfds)) { |
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93 read(0, &typecode, 1); |
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94 if (typecode == '\n') |
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95 done = 1; |
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96 } |
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97 |
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98 } |
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99 close(ifd); |
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100 return 0; |
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101 } |