X-Git-Url: https://git.octo.it/?p=collectd.git;a=blobdiff_plain;f=src%2Fzfs_arc.c;fp=src%2Fzfs_arc.c;h=6c66fb1390d9afe8493aaa9fb992cabd7bf4ed2c;hp=55166fa6486b30da24fd94110d6a01e9cc4d01e2;hb=7111bb6df7628edce3a8e538b386fbe27633a191;hpb=deb7d3cfd23c8e9e2b43e41f998fdea85fb4bab8

diff --git a/src/zfs_arc.c b/src/zfs_arc.c
index 55166fa6..6c66fb13 100644
--- a/src/zfs_arc.c
+++ b/src/zfs_arc.c
@@ -232,6 +232,23 @@ 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;