X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=src%2Fzfs_arc.c;h=d1ee111bb637f70db05bf8fd5b3186bdb4995c87;hb=711f5b6c86f51061c21bedcaa46214a01de0125c;hp=c9abdd5f03c008914a4bd5d5283bd6d06b9db5b3;hpb=d486225f89ea52d8ed2b4242eba2ad94c409f837;p=collectd.git

diff --git a/src/zfs_arc.c b/src/zfs_arc.c
index c9abdd5f..d1ee111b 100644
--- a/src/zfs_arc.c
+++ b/src/zfs_arc.c
@@ -231,6 +231,23 @@ static int za_read(void) {
     return -1;
   }
 
+  // Ignore the first two lines because they contain information about
+  // the rest of the file.
+  // See kstat_seq_show_headers module/spl/spl-kstat.c of the spl kernel
+  // module.
+  if (fgets(buffer, sizeof(buffer), fh) == NULL) {
+    ERROR("zfs_arc plugin: \"%s\" does not contain a single line.",
+          ZOL_ARCSTATS_FILE);
+    fclose(fh);
+    return (-1);
+  }
+  if (fgets(buffer, sizeof(buffer), fh) == NULL) {
+    ERROR("zfs_arc plugin: \"%s\" does not contain at least two lines.",
+          ZOL_ARCSTATS_FILE);
+    fclose(fh);
+    return (-1);
+  }
+
   while (fgets(buffer, sizeof(buffer), fh) != NULL) {
     char *fields[3];
     value_t v;