Fatto un programma di esempio per inotify senza tirare in mezzo epoll,

[gapil.git] / listati / inotify_monitor.c

diff --git a/listati/inotify_monitor.c b/listati/inotify_monitor.c
new file mode 100644 (file)
index 0000000..310195a
--- /dev/null
+++ b/listati/inotify_monitor.c
@@ -0,0 +1,56 @@
+#include <sys/inotify.h> /* Linux inotify interface */
+...
+int main(int argc, char *argv[]) 
+{
+    int i, narg, nread;
+    int fd, wd;
+    char buffer[512 * (sizeof(struct inotify_event) + 16)];
+    unsigned int mask=0;
+    struct inotify_event * event;
+    ...
+    narg = argc - optind; 
+    if (narg < 1) { /* There must be at least one argument */
+       printf("Wrong number of arguments %d\n", argc - optind);
+        usage();
+    }
+    fd = inotify_init();       /* initialize inotify */
+    if (fd < 0) {
+       perror("Failing on inotify_init");
+       exit(-1);
+    }
+    i = 0;
+    while (i < narg) {
+       wd = inotify_add_watch(fd, argv[optind+i], mask);  /* add watch */
+       if (wd <= 0) {
+           printf("Failing to add watched file %s, mask %i; %s\n", 
+                  argv[optind+i], mask, strerror(errno));
+           exit(-1);
+       }
+       i++;
+    }
+    /* Main Loop: read events and print them */
+    while (1) {
+       nread = read(fd, buffer, sizeof(buffer));
+       if (nread < 0) {
+           if (errno == EINTR) {
+               continue;
+           } else {
+               perror("error reading inotify data");
+               exit(1);
+           }
+       } else {
+           i = 0;
+           while (i < nread) { 
+               event = (struct inotify_event *) buffer + i;
+               printf("Watch descriptor %i\n", event->wd);
+               printf("Observed event on %s\n", argv[optind-1+event->wd]);
+               if (event->len) {
+                   printf("On file %s\n", event->name);
+               }
+               printevent(event->mask);
+               i += sizeof(struct inotify_event) + event->len;
+           }
+       }
+    }
+    return 0;
+}