diff options
Diffstat (limited to 'contrib/tcl/unix/tclUnixSock.c')
| -rw-r--r-- | contrib/tcl/unix/tclUnixSock.c | 27 |
1 files changed, 22 insertions, 5 deletions
diff --git a/contrib/tcl/unix/tclUnixSock.c b/contrib/tcl/unix/tclUnixSock.c index 4301889..b917832 100644 --- a/contrib/tcl/unix/tclUnixSock.c +++ b/contrib/tcl/unix/tclUnixSock.c @@ -8,21 +8,38 @@ * See the file "license.terms" for information on usage and redistribution * of this file, and for a DISCLAIMER OF ALL WARRANTIES. * - * SCCS: @(#) tclUnixSock.c 1.6 96/08/08 08:48:51 + * SCCS: @(#) tclUnixSock.c 1.7 97/07/24 17:54:02 */ #include "tcl.h" #include "tclPort.h" /* - * The following variable holds the network name of this host. + * There is no portable macro for the maximum length + * of host names returned by gethostbyname(). We should only + * trust SYS_NMLN if it is at least 255 + 1 bytes to comply with DNS + * host name limits. + * + * Note: SYS_NMLN is a restriction on "uname" not on gethostbyname! + * + * For example HP-UX 10.20 has SYS_NMLN == 9, while gethostbyname() + * can return a fully qualified name from DNS of up to 255 bytes. + * + * Fix suggested by Viktor Dukhovni (viktor@esm.com) */ -#ifndef SYS_NMLN -# define SYS_NMLN 100 +#if defined(SYS_NMLN) && SYS_NMLEN >= 256 +#define TCL_HOSTNAME_LEN SYS_NMLEN +#else +#define TCL_HOSTNAME_LEN 256 #endif -static char hostname[SYS_NMLN + 1]; + +/* + * The following variable holds the network name of this host. + */ + +static char hostname[TCL_HOSTNAME_LEN + 1]; static int hostnameInited = 0; /* |
