OpenSSL: fix build on older library version

[exim.git] / src / src / buildconfig.c

diff --git a/src/src/buildconfig.c b/src/src/buildconfig.c
index c90d940aa8fcc0b881af69a3bf6fdf1c17b67f79..bbbaefe9c4e16dfdc3c36dbe9635ad54d0c8f635 100644 (file)
--- a/src/src/buildconfig.c
+++ b/src/src/buildconfig.c
@@ -2,7 +2,8 @@
 *     Exim - an Internet mail transport agent    *
 *************************************************/
 
 *     Exim - an Internet mail transport agent    *
 *************************************************/
 

-/* Copyright (c) University of Cambridge 1995 - 2012 */
+/* Copyright (c) The Exim Maintainers 2022 */
+/* Copyright (c) University of Cambridge 1995 - 2018 */

 /* See the file NOTICE for conditions of use and distribution. */
 
 
 /* See the file NOTICE for conditions of use and distribution. */
 
 


@@ -36,6 +37,8 @@ normally called independently. */
 #include <stdlib.h>
 #include <string.h>
 #include <sys/types.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/types.h>

+#include <sys/time.h>
+#include <poll.h>

 #include <pwd.h>
 #include <grp.h>
 
 #include <pwd.h>
 #include <grp.h>
 


@@ -49,7 +52,7 @@ typedef struct {
   char *data;
 } save_item;
 
   char *data;
 } save_item;
 

-static const char *db_opts[] = { "", "USE_DB", "USE_GDBM", "USE_TDB" };
+static const char *db_opts[] = { "", "USE_DB", "USE_GDBM", "USE_TDB", "USE_NDBM" };

 
 static int have_ipv6 = 0;
 static int have_iconv = 0;
 
 static int have_ipv6 = 0;
 static int have_iconv = 0;


@@ -101,12 +104,16 @@ main(int argc, char **argv)
 {
 off_t test_off_t = 0;
 time_t test_time_t = 0;
 {
 off_t test_off_t = 0;
 time_t test_time_t = 0;

+ino_t test_ino_t;

 #if ! (__STDC_VERSION__ >= 199901L)
 size_t test_size_t = 0;
 ssize_t test_ssize_t = 0;
 unsigned long test_ulong_t = 0L;
 #if ! (__STDC_VERSION__ >= 199901L)
 size_t test_size_t = 0;
 ssize_t test_ssize_t = 0;
 unsigned long test_ulong_t = 0L;

+unsigned int test_uint_t = 0;

 #endif
 long test_long_t = 0;
 #endif
 long test_long_t = 0;

+long long test_longlong_t = 0;
+int test_int_t = 0;

 FILE *base;
 FILE *new;
 int last_initial = 'A';
 FILE *base;
 FILE *new;
 int last_initial = 'A';


@@ -150,15 +157,16 @@ This assumption is known to be OK for the common operating systems. */
 
 fprintf(new, "#ifndef OFF_T_FMT\n");
 if (sizeof(test_off_t) > sizeof(test_long_t))
 
 fprintf(new, "#ifndef OFF_T_FMT\n");
 if (sizeof(test_off_t) > sizeof(test_long_t))

-  {
-  fprintf(new, "#define OFF_T_FMT  \"%%lld\"\n");
-  fprintf(new, "#define LONGLONG_T long long int\n");
-  }
+  fprintf(new, "# define OFF_T_FMT  \"%%lld\"\n");

 else
 else

-  {
-  fprintf(new, "#define OFF_T_FMT  \"%%ld\"\n");
-  fprintf(new, "#define LONGLONG_T long int\n");
-  }
+  fprintf(new, "# define OFF_T_FMT  \"%%ld\"\n");
+fprintf(new, "#endif\n\n");
+
+fprintf(new, "#ifndef LONGLONG_T\n");
+if (sizeof(test_longlong_t) > sizeof(test_long_t))
+  fprintf(new, "# define LONGLONG_T long long int\n");
+else
+  fprintf(new, "# define LONGLONG_T long int\n");

 fprintf(new, "#endif\n\n");
 
 /* Now do the same thing for time_t variables. If the length is greater than
 fprintf(new, "#endif\n\n");
 
 /* Now do the same thing for time_t variables. If the length is greater than


@@ -169,14 +177,23 @@ off_t. */
 fprintf(new, "#ifndef TIME_T_FMT\n");
 if (sizeof(test_time_t) > sizeof(test_long_t))
   {
 fprintf(new, "#ifndef TIME_T_FMT\n");
 if (sizeof(test_time_t) > sizeof(test_long_t))
   {

-  fprintf(new, "#define TIME_T_FMT  \"%%lld\"\n");
-  fprintf(new, "#undef  LONGLONG_T\n");
-  fprintf(new, "#define LONGLONG_T long long int\n");
+  fprintf(new, "# define TIME_T_FMT  \"%%lld\"\n");
+  fprintf(new, "# undef  LONGLONG_T\n");
+  fprintf(new, "# define LONGLONG_T long long int\n");

   }
 else
   }
 else

-  {
-  fprintf(new, "#define TIME_T_FMT  \"%%ld\"\n");
-  }
+  fprintf(new, "# define TIME_T_FMT  \"%%ld\"\n");
+fprintf(new, "#endif\n\n");
+
+fprintf(new, "#ifndef INO_T_FMT\n");
+if (sizeof(test_ino_t) > sizeof(test_long_t))
+  fprintf(new, "# define INO_T_FMT  \"%%llu\"\n");
+else
+  fprintf(new, "# define INO_T_FMT  \"%%lu\"\n");
+fprintf(new, "#endif\n\n");
+
+fprintf(new, "#ifndef PID_T_FMT\n");
+fprintf(new, "# define PID_T_FMT  \"%%lu\"\n");

 fprintf(new, "#endif\n\n");
 
 /* And for sizeof() results, size_t, which should with C99 be just %zu, deal
 fprintf(new, "#endif\n\n");
 
 /* And for sizeof() results, size_t, which should with C99 be just %zu, deal


@@ -190,18 +207,22 @@ fprintf(new, "#define SSIZE_T_FMT  \"%%zd\"\n");
 #else
 if (sizeof(test_size_t) > sizeof (test_ulong_t))
   fprintf(new, "#define SIZE_T_FMT  \"%%llu\"\n");
 #else
 if (sizeof(test_size_t) > sizeof (test_ulong_t))
   fprintf(new, "#define SIZE_T_FMT  \"%%llu\"\n");

-else
+else if (sizeof(test_size_t) > sizeof (test_uint_t))

   fprintf(new, "#define SIZE_T_FMT  \"%%lu\"\n");
   fprintf(new, "#define SIZE_T_FMT  \"%%lu\"\n");

+else
+  fprintf(new, "#define SIZE_T_FMT  \"%%u\"\n");
+

 if (sizeof(test_ssize_t) > sizeof(test_long_t))
   fprintf(new, "#define SSIZE_T_FMT  \"%%lld\"\n");
 if (sizeof(test_ssize_t) > sizeof(test_long_t))
   fprintf(new, "#define SSIZE_T_FMT  \"%%lld\"\n");

-else
+else if (sizeof(test_ssize_t) > sizeof(test_int_t))

   fprintf(new, "#define SSIZE_T_FMT  \"%%ld\"\n");
   fprintf(new, "#define SSIZE_T_FMT  \"%%ld\"\n");

+else
+  fprintf(new, "#define SSIZE_T_FMT  \"%%d\"\n");

 #endif
 
 /* Now search the makefile for certain settings */
 
 #endif
 
 /* Now search the makefile for certain settings */
 

-base = fopen("Makefile", "rb");
-if (base == NULL)
+if (!(base = fopen("Makefile", "rb")))

   {
   printf("*** Buildconfig: failed to open Makefile\n");
   (void)fclose(new);
   {
   printf("*** Buildconfig: failed to open Makefile\n");
   (void)fclose(new);


@@ -366,7 +387,6 @@ while (fgets(buffer, sizeof(buffer), base) != NULL)
   encountered. */
 
   for (i = 1; i < sizeof(db_opts)/sizeof(char *); i++)
   encountered. */
 
   for (i = 1; i < sizeof(db_opts)/sizeof(char *); i++)

-    {

     if (strcmp(name, db_opts[i]) == 0)
       {
       if (use_which_db == i)
     if (strcmp(name, db_opts[i]) == 0)
       {
       if (use_which_db == i)


@@ -376,7 +396,6 @@ while (fgets(buffer, sizeof(buffer), base) != NULL)
         fprintf(new, "/* %s not set */\n", name);
       break;
       }
         fprintf(new, "/* %s not set */\n", name);
       break;
       }

-    }

   if (i < sizeof(db_opts)/sizeof(char *)) continue;
 
   /* EXIM_USER is a special case. We look in the environment for EXIM_USER or
   if (i < sizeof(db_opts)/sizeof(char *)) continue;
 
   /* EXIM_USER is a special case. We look in the environment for EXIM_USER or


@@ -716,21 +735,23 @@ else if (isgroup)
       fprintf(new, "#define FIXED_NEVER_USERS     %d", j);
       for (i = 0; i < j; i++) fprintf(new, ", %d", (unsigned int)vector[i]);
       fprintf(new, "\n");
       fprintf(new, "#define FIXED_NEVER_USERS     %d", j);
       for (i = 0; i < j; i++) fprintf(new, ", %d", (unsigned int)vector[i]);
       fprintf(new, "\n");

+      free(vector);

       }
     continue;
     }
 
       }
     continue;
     }
 

-  /* WITH_CONTENT_SCAN is another special case: it must be set if either it or
-  WITH_OLD_DEMIME is set. */
-
-  if (strcmp(name, "WITH_CONTENT_SCAN") == 0)
+  /* DISABLE_DKIM is special; must be forced if DISABLE_TLS */
+  if (strcmp(name, "DISABLE_DKIM") == 0)

     {
     {

-    char *wcs = getenv("WITH_CONTENT_SCAN");
-    char *wod = getenv("WITH_OLD_DEMIME");
-    char *dcc = getenv("EXPERIMENTAL_DCC");
-    if (wcs != NULL || wod != NULL || dcc != NULL)
-      fprintf(new, "#define WITH_CONTENT_SCAN     yes\n");
-    else fprintf(new, "/* WITH_CONTENT_SCAN not set */\n");
+    char *d_dkim = getenv("DISABLE_DKIM");
+    char *notls = getenv("DISABLE_TLS");
+
+    if (d_dkim)
+      fprintf(new, "#define DISABLE_DKIM          yes\n");
+    else if (notls)
+      fprintf(new, "#define DISABLE_DKIM          yes /* forced by lack of TLS */\n");
+    else
+      fprintf(new, "/* DISABLE_DKIM not set */\n");

     continue;
     }
 
     continue;
     }
 


@@ -804,7 +825,11 @@ else if (isgroup)
             strncpy(buffer, ss, sss-ss);
             buffer[sss-ss] = 0;  /* For empty case */
             }
             strncpy(buffer, ss, sss-ss);
             buffer[sss-ss] = 0;  /* For empty case */
             }

-          else strcpy(buffer, ss);
+          else
+           {
+                   strncpy(buffer, ss, sizeof(buffer));
+           buffer[sizeof(buffer)-1] = 0;
+           }

           pp = buffer + (int)strlen(buffer);
           while (pp > buffer && isspace((unsigned char)pp[-1])) pp--;
           *pp = 0;
           pp = buffer + (int)strlen(buffer);
           while (pp > buffer && isspace((unsigned char)pp[-1])) pp--;
           *pp = 0;


@@ -847,16 +872,17 @@ else if (isgroup)
         }
 
       /* how many bits Exim, as a client, demands must be in D-H */
         }
 
       /* how many bits Exim, as a client, demands must be in D-H */

-      /* as of GnuTLS 2.12.x, we ask for "normal" for D-H PK; before that, we
-      specify the number of bits.  We've stuck with the historical value, but
-      it can be overriden. */
-      else if ((strcmp(name, "EXIM_CLIENT_DH_MIN_BITS") == 0) ||
+      /* 1024 is a historical figure; some sites actually use lower, so we
+      permit the value to be lowered "dangerously" low, but not "insanely"
+      low.  Though actually, 1024 is becoming "dangerous". */
+      else if ((strcmp(name, "EXIM_CLIENT_DH_MIN_MIN_BITS") == 0) ||
+               (strcmp(name, "EXIM_CLIENT_DH_DEFAULT_MIN_BITS") == 0) ||

                (strcmp(name, "EXIM_SERVER_DH_BITS_PRE2_12") == 0))
         {
         long nv;
         char *end;
         nv = strtol(value, &end, 10);
                (strcmp(name, "EXIM_SERVER_DH_BITS_PRE2_12") == 0))
         {
         long nv;
         char *end;
         nv = strtol(value, &end, 10);

-        if (end != value && *end == '\0' && nv >= 1000 && nv < 50000)
+        if (end != value && *end == '\0' && nv >= 512 && nv < 500000)

           {
           fprintf(new, "%s\n", value);
           }
           {
           fprintf(new, "%s\n", value);
           }


@@ -914,9 +940,25 @@ else if (isgroup)
 defined. */
 
 if (have_auth)
 defined. */
 
 if (have_auth)

-  {

   if (!support_crypteq) fprintf(new, "/* Force SUPPORT_CRYPTEQ for AUTH */\n"
     "#define SUPPORT_CRYPTEQ\n");
   if (!support_crypteq) fprintf(new, "/* Force SUPPORT_CRYPTEQ for AUTH */\n"
     "#define SUPPORT_CRYPTEQ\n");

+
+/* Check poll() for timer functionality.
+Some OS' have released with it broken. */
+
+  {
+  struct timeval before, after;
+  size_t us;
+
+  gettimeofday(&before, NULL);
+  (void) poll(NULL, 0, 500);
+  gettimeofday(&after, NULL);
+
+  us = (after.tv_sec - before.tv_sec) * 1000000 +
+    (after.tv_usec - before.tv_usec);
+
+  if (us < 400000)
+    fprintf(new, "#define NO_POLL_H\n");

   }
 
 /* End off */
   }
 
 /* End off */