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-rw-r--r--lib/erl_interface/src/connect/ei_connect.c9
-rw-r--r--lib/erl_interface/src/prog/erl_call.c3
2 files changed, 8 insertions, 4 deletions
diff --git a/lib/erl_interface/src/connect/ei_connect.c b/lib/erl_interface/src/connect/ei_connect.c
index c193fd804a..27b919c093 100644
--- a/lib/erl_interface/src/connect/ei_connect.c
+++ b/lib/erl_interface/src/connect/ei_connect.c
@@ -497,7 +497,8 @@ int ei_connect_init(ei_cnode* ec, const char* this_node_name,
}
#endif /* _REENTRANT */
- if (gethostname(thishostname, EI_MAXHOSTNAMELEN) == -1) {
+ /* gethostname requires len to be max(hostname) + 1 */
+ if (gethostname(thishostname, EI_MAXHOSTNAMELEN+1) == -1) {
#ifdef __WIN32__
EI_TRACE_ERR1("ei_connect_init","Failed to get host name: %d",
WSAGetLastError());
@@ -613,7 +614,8 @@ int ei_connect_tmo(ei_cnode* ec, char *nodename, unsigned ms)
hp = ei_gethostbyname_r(hostname,&host,buffer,1024,&ei_h_errno);
if (hp == NULL) {
char thishostname[EI_MAXHOSTNAMELEN+1];
- if (gethostname(thishostname,EI_MAXHOSTNAMELEN) < 0) {
+ /* gethostname requies len to be max(hostname) + 1*/
+ if (gethostname(thishostname,EI_MAXHOSTNAMELEN+1) < 0) {
EI_TRACE_ERR0("ei_connect_tmo",
"Failed to get name of this host");
erl_errno = EHOSTUNREACH;
@@ -636,7 +638,8 @@ int ei_connect_tmo(ei_cnode* ec, char *nodename, unsigned ms)
#else /* __WIN32__ */
if ((hp = ei_gethostbyname(hostname)) == NULL) {
char thishostname[EI_MAXHOSTNAMELEN+1];
- if (gethostname(thishostname,EI_MAXHOSTNAMELEN) < 0) {
+ /* gethostname requires len to be max(hostname) + 1 */
+ if (gethostname(thishostname,EI_MAXHOSTNAMELEN+1) < 0) {
EI_TRACE_ERR1("ei_connect_tmo",
"Failed to get name of this host: %d",
WSAGetLastError());
diff --git a/lib/erl_interface/src/prog/erl_call.c b/lib/erl_interface/src/prog/erl_call.c
index d233ed26a2..0b09d412db 100644
--- a/lib/erl_interface/src/prog/erl_call.c
+++ b/lib/erl_interface/src/prog/erl_call.c
@@ -325,7 +325,8 @@ int erl_call(int argc, char **argv)
initWinSock();
#endif
- if (gethostname(h_hostname, EI_MAXHOSTNAMELEN) < 0) {
+ /* gethostname requires len to be max(hostname) + 1 */
+ if (gethostname(h_hostname, EI_MAXHOSTNAMELEN+1) < 0) {
fprintf(stderr,"erl_call: failed to get host name: %d\n", errno);
exit(1);
}