{
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) {