RLGWebD: dglwatcher.c annotate

annotate dglwatcher.c @ 192:addc4e3456c4

Begin adding systemd compatibility. The Makefile can be used to build and install rlgwebd. On systems with systemd, the unit file controls starting and stopping the service, and the shell script is not needed. The unit file uses KillMode=none because socat does not actually stop rlgwebd, it only asks it to stop and exits without waiting for a response. Until a better stopping method is introduced, this setting prevents systemd from killing all the rlgwebd processes as soon as socat exits.

author	John "Elwin" Edwards
date	Fri, 01 Jan 2016 16:11:34 -0500
parents	fba1b34e7554
children

rev	line source
155 245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	1 #include <stdio.h>
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	2 #include <stdlib.h>
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	3 #include <string.h>
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	4 #include <sys/inotify.h>
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	5 #include <sys/select.h>
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	6 #include <unistd.h>
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	7 #include <limits.h>
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	8 #include <dirent.h>
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	9
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	10 struct watchdir {
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	11 int wd;
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	12 char *name;
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	13 };
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	14
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	15 char ibuf[sizeof(struct inotify_event) + NAME_MAX + 1];
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	16
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	17 int startwatch(int ifd, char dir, struct watchdir w) {
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	18 DIR *dstream;
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	19 struct dirent *ent;
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	20
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	21 w->name = dir;
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	22 w->wd = inotify_add_watch(ifd, dir, IN_CREATE\|IN_DELETE\|IN_DELETE_SELF);
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	23 if (w->wd < 0) {
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	24 fprintf(stderr, "Could not watch %s\n", dir);
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	25 return 1;
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	26 }
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	27 dstream = opendir(dir);
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	28 if (dstream == NULL) {
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	29 fprintf(stderr, "%s is not a readable directory\n", dir);
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	30 inotify_rm_watch(ifd, w->wd);
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	31 w->wd = -1;
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	32 return 1;
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	33 }
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	34 ent = readdir(dstream);
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	35 while (ent != NULL) {
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	36 if (strcmp(ent->d_name, ".") && strcmp(ent->d_name, ".."))
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	37 printf("E %s/%s\n", dir, ent->d_name);
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	38 ent = readdir(dstream);
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	39 }
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	40 closedir(dstream);
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	41 fflush(stdout);
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	42 return 0;
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	43 }
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	44
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	45 int main(int argc, char *argv[]) {
166 66fef65c34e7 watcher: exit if errors occur. John "Elwin" Edwards parents: 155 diff changeset	46 int ifd, rsize, off, done, nwatchers, i, result;
155 245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	47 char typecode;
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	48 struct inotify_event *iev;
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	49 fd_set rfds;
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	50 struct watchdir *watchers;
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	51
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	52 done = 0;
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	53 nwatchers = argc - 1;
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	54 iev = (struct inotify_event *) ibuf;
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	55 ifd = inotify_init();
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	56 if (nwatchers == 0) {
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	57 watchers = malloc(sizeof(struct watchdir));
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	58 nwatchers = 1;
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	59 startwatch(ifd, ".", watchers);
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	60 }
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	61 else {
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	62 watchers = malloc(nwatchers * sizeof(struct watchdir));
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	63 for (i = 0; i < nwatchers; i++) {
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	64 startwatch(ifd, argv[i+1], watchers + i);
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	65 }
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	66 }
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	67
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	68 while (!done) {
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	69 FD_ZERO(&rfds);
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	70 FD_SET(0, &rfds);
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	71 FD_SET(ifd, &rfds);
166 66fef65c34e7 watcher: exit if errors occur. John "Elwin" Edwards parents: 155 diff changeset	72 result = select(ifd + 1, &rfds, NULL, NULL, NULL);
66fef65c34e7 watcher: exit if errors occur. John "Elwin" Edwards parents: 155 diff changeset	73 if (result < 0) {
66fef65c34e7 watcher: exit if errors occur. John "Elwin" Edwards parents: 155 diff changeset	74 /* Something went wrong. */
66fef65c34e7 watcher: exit if errors occur. John "Elwin" Edwards parents: 155 diff changeset	75 break;
66fef65c34e7 watcher: exit if errors occur. John "Elwin" Edwards parents: 155 diff changeset	76 }
155 245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	77 if (FD_ISSET(ifd, &rfds)) {
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	78 off = 0;
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	79 rsize = read(ifd, ibuf, sizeof(struct inotify_event) + NAME_MAX + 1);
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	80 while (off < rsize) {
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	81 iev = (struct inotify_event *) (ibuf + off);
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	82 if (iev->mask & IN_CREATE)
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	83 typecode = 'C';
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	84 else if (iev->mask & IN_DELETE)
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	85 typecode = 'D';
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	86 else
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	87 typecode = '?';
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	88 for (i = 0; i < nwatchers; i++) {
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	89 if (watchers[i].wd == iev->wd)
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	90 printf("%c %s/%s\n", typecode, watchers[i].name, iev->name);
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	91 }
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	92 off += sizeof(struct inotify_event) + iev->len;
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	93 }
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	94 fflush(stdout);
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	95 }
245a2959f504 Begin support for watching dgamelaunch games. John "Elwin" Edwards parents: diff changeset	96 if (FD_ISSET(0, &rfds)) {
166 66fef65c34e7 watcher: exit if errors occur. John "Elwin" Edwards parents: 155 diff changeset	97 result = read(0, &typecode, 1);
66fef65c34e7 watcher: exit if errors occur. John "Elwin" Edwards parents: 155 diff changeset	98 if (result <= 0) {
66fef65c34e7 watcher: exit if errors occur. John "Elwin" Edwards parents: 155 diff changeset	99 /* EOF on stdin: controlling process probably died. */
66fef65c34e7 watcher: exit if errors occur. John "Elwin" Edwards parents: 155 diff changeset	100 done = 1;
66fef65c34e7 watcher: exit if errors occur. John "Elwin" Edwards

Mercurial > hg > rlgwebd

annotate dglwatcher.c @ 192:addc4e3456c4