unixsock plugin: Replace `getgrnam' with `getgrnam_r'.

diff --git a/src/unixsock.c b/src/unixsock.c
index 12ebc0995cf0d2bfe85ca9c56768ca83988f8c92..b4af8b386a67e8b48e23f0bba02cef1d2275d7b7 100644 (file)
--- a/src/unixsock.c
+++ b/src/unixsock.c
@@ -387,21 +387,27 @@ static int us_open_socket (void)
 
        do
        {
+               char *grpname;
                struct group *g;
+               struct group sg;
+               char grbuf[2048];
 
-               errno = 0;
-               g = getgrnam ((sock_group != NULL) ? sock_group : COLLECTD_GRP_NAME);
+               grpname = (sock_group != NULL) ? sock_group : COLLECTD_GRP_NAME;
+               g = NULL;
 
-               if (errno != 0)
+               status = getgrnam_r (grpname, &sg, grbuf, sizeof (grbuf), &g);
+               if (status != 0)
                {
-                       syslog (LOG_WARNING, "unixsock plugin: getgrnam (%s) failed: %s",
-                                       (sock_group != NULL) ? sock_group : COLLECTD_GRP_NAME,
-                                       strerror (errno));
+                       syslog (LOG_WARNING, "unixsock plugin: getgrnam_r (%s) failed: %s",
+                                       grpname, strerror (status));
                        break;
                }
-
                if (g == NULL)
+               {
+                       syslog (LOG_WARNING, "unixsock plugin: No such group: `%s'",
+                                       grpname);
                        break;
+               }
 
                if (chown ((sock_file != NULL) ? sock_file : US_DEFAULT_PATH,
                                        (uid_t) -1, g->gr_gid) != 0)