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 b406d48..d1df0a1 100644 (file)
--- a/src/email.c
+++ b/src/email.c
@@ -361,8 +361,6 @@ static void *collect(void *arg) {
 } /* static void *collect (void *) */
 
 static void *open_connection(void __attribute__((unused)) * arg) {
-  struct sockaddr_un addr;
-
   const char *path = (NULL == sock_file) ? SOCK_PATH : sock_file;
   const char *group = (NULL == sock_group) ? COLLECTD_GRP_NAME : sock_group;
 
@@ -375,7 +373,9 @@ static void *open_connection(void __attribute__((unused)) * arg) {
     pthread_exit((void *)1);
   }
 
-  addr.sun_family = AF_UNIX;
+  struct sockaddr_un addr = {
+    .sun_family = AF_UNIX
+  };
   sstrncpy(addr.sun_path, path, (size_t)(UNIX_PATH_MAX - 1));
 
   errno = 0;
@@ -403,15 +403,21 @@ static void *open_connection(void __attribute__((unused)) * arg) {
   {
     struct group sg;
     struct group *grp;
-    char grbuf[2048];
     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) {
       char errbuf[1024];
       log_warn("getgrnam_r (%s) failed: %s", group,
-               sstrerror(errno, errbuf, sizeof(errbuf)));
+               sstrerror(status, errbuf, sizeof(errbuf)));
     } else if (grp == NULL) {
       log_warn("No such group: `%s'", group);
     } else {