dates from 2038 or later now return 0x7fffffff when 32 bit time_t is used

CHANGES

@@ -6,6 +6,11 @@
 
                                   Changelog
 
+Daniel (11 November 2004)
+- Jeff Phillips found out that a date string with a year beyond 2038 could
+  crash the new date parser on systems with 32bit time_t. We now check for
+  this case and deal with it.
+
 Daniel (10 November 2004)
 - I installed Heimdal on my Debian box (using the debian package) and noticed
   that configure --with-gssapi failed to create a nice build. Fixed now.

configure.ac

@@ -1171,6 +1171,7 @@ AC_CHECK_SIZEOF(curl_off_t, ,[
 ])
 AC_CHECK_SIZEOF(size_t)
 AC_CHECK_SIZEOF(long)
+AC_CHECK_SIZEOF(time_t)
 
 AC_CHECK_TYPE(long long,
    [AC_DEFINE(HAVE_LONGLONG, 1, [if your compiler supports long long])]

docs/libcurl/curl_getdate.3

@@ -83,6 +83,9 @@ only ones RFC2616 says HTTP applications may use.
 .SH RETURN VALUE
 This function returns -1 when it fails to parse the date string. Otherwise it
 returns the number of seconds as described.
+
+If the year is larger than 2037 on systems with 32 bit time_t, this function
+will return 0x7fffffff (since that is the largest possible 31 bit number).
 .SH REWRITE
 The former version of this function was built with yacc and was not only very
 large, it was also never quite understood and it wasn't possible to build with

lib/parsedate.c

@@ -350,6 +350,12 @@ static time_t Curl_parsedate(const char *date)
     /* lacks vital info, fail */
     return -1;
 
+#if SIZEOF_TIME_T < 5
+  /* 32 bit time_t can only hold dates to the beginning of 2038 */
+  if(yearnum > 2037)
+    return 0x7fffffff;
+#endif
+
   tm.tm_sec = secnum;
   tm.tm_min = minnum;
   tm.tm_hour = hournum;

lib/setup.h

@@ -287,6 +287,11 @@ typedef int curl_socket_t;
 #define USE_LIBIDN
 #endif
 
+#ifndef SIZEOF_TIME_T
+/* assume default size of time_t to be 32 bit */
+#define SIZEOF_TIME_T 4
+#endif
+
 #define LIBIDN_REQUIRED_VERSION "0.4.1"
 
 #endif /* __CONFIG_H */