- status = getgrnam_r(pl->group, &gr, grbuf, sizeof(grbuf), &gr_ptr);
- if (status != 0) {
- ERROR("exec plugin: Failed to get group information "
- "for group ``%s'': %s",
- pl->group, STRERROR(status));
- goto failed;
+ long int size;
+ size = grbuf_size;
+ char *temp = NULL;
+ char *grbuf = NULL;
+ int getgr_failed = 0;
+ grbuf = malloc(size);
+ if (grbuf == NULL) {
+ ERROR("exec plugin: get group information for '%s' failed: buffer "
+ "malloc() failed",
+ pl->group);
+ getgr_failed = 1;
+ goto gr_finally;
+ }
+ int status;
+ while ((status = getgrnam_r(pl->group, &gr, grbuf, size, &gr_ptr)) != 0) {
+ switch (errno) {
+ case ERANGE:
+ if ((size + grbuf_size) < size ||
+ (size + grbuf_size) > MAX_GRBUF_SIZE) {
+ ERROR("exec plugin: get group information for '%s' max buffer "
+ "limit (%ld) reached \n",
+ pl->group, MAX_GRBUF_SIZE);
+ getgr_failed = 1;
+ goto gr_finally;
+ }
+ /* grow the buffer by 'grbuf_size' each time getgrnamr fails */
+ size += grbuf_size;
+ temp = realloc(grbuf, size);
+ if (temp == NULL) {
+ ERROR("exec plugin: get group information for '%s' realloc() "
+ "buffer to (%ld) failed ",
+ pl->group, size);
+ getgr_failed = 1;
+ goto gr_finally;
+ }
+ grbuf = temp;
+ break;
+ default:
+ ERROR("exec plugin: default errno: get group information for '%s' "
+ "failed : %s",
+ pl->group, sstrerror(status, errbuf, sizeof(errbuf)));
+ getgr_failed = 1;
+ goto gr_finally;
+ }