Merge branch 'collectd-5.6' into collectd-5.7

[collectd.git] / src / email.c

diff --git a/src/email.c b/src/email.c
index 50f7662..d1df0a1 100644 (file)
--- a/src/email.c
+++ b/src/email.c
@@ -403,9 +403,15 @@ static void *open_connection(void __attribute__((unused)) * arg) {
   {
     struct group sg;
     struct group *grp;
-    char grbuf[4096];
     int status;
 
+    long int grbuf_size = sysconf(_SC_GETGR_R_SIZE_MAX);
+    if (grbuf_size <= 0)
+      grbuf_size = sysconf(_SC_PAGESIZE);
+    if (grbuf_size <= 0)
+      grbuf_size = 4096;
+    char grbuf[grbuf_size];
+
     grp = NULL;
     status = getgrnam_r(group, &sg, grbuf, sizeof(grbuf), &grp);
     if (status != 0) {