Build: probe for broken poll() timing implementation

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

diff --git a/src/src/buildconfig.c b/src/src/buildconfig.c
index 45e820c81b850d313fc4f1bfbc3000f8fa929851..3d404f100865e59e6519a2ee3f7e25d248ad4fa0 100644 (file)
--- a/src/src/buildconfig.c
+++ b/src/src/buildconfig.c
@@ -2,7 +2,7 @@
 *     Exim - an Internet mail transport agent    *
 *************************************************/
 
-/* Copyright (c) University of Cambridge 1995 - 2012 */
+/* Copyright (c) University of Cambridge 1995 - 2018 */
 /* See the file NOTICE for conditions of use and distribution. */
 
 
@@ -36,6 +36,8 @@ normally called independently. */
 #include <stdlib.h>
 #include <string.h>
 #include <sys/types.h>
+#include <sys/time.h>
+#include <poll.h>
 #include <pwd.h>
 #include <grp.h>
 
@@ -101,12 +103,15 @@ main(int argc, char **argv)
 {
 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;
+unsigned int test_uint_t = 0;
 #endif
 long test_long_t = 0;
+int test_int_t = 0;
 FILE *base;
 FILE *new;
 int last_initial = 'A';
@@ -151,13 +156,13 @@ 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, "#define OFF_T_FMT  \"%%lld\"\n");
-  fprintf(new, "#define LONGLONG_T long long int\n");
+  fprintf(new, "# define OFF_T_FMT  \"%%lld\"\n");
+  fprintf(new, "# define LONGLONG_T long long int\n");
   }
 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, "# define LONGLONG_T long int\n");
   }
 fprintf(new, "#endif\n\n");
 
@@ -169,14 +174,23 @@ off_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
-  {
-  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
@@ -190,12 +204,17 @@ 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
+else if (sizeof(test_size_t) > sizeof (test_uint_t))
   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");
-else
+else if (sizeof(test_ssize_t) > sizeof(test_int_t))
   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 */
@@ -716,21 +735,21 @@ 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");
+      free(vector);
       }
     continue;
     }
 
-  /* WITH_CONTENT_SCAN is another special case: it must be set if either it or
-  WITH_OLD_DEMIME is set. */
+  /* WITH_CONTENT_SCAN is another special case: it must be set if it or
+  EXPERIMENTAL_DCC is set. */
 
   if (strcmp(name, "WITH_CONTENT_SCAN") == 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");
+    fprintf(new, wcs || dcc
+      ? "#define WITH_CONTENT_SCAN     yes\n"
+      : "/* WITH_CONTENT_SCAN not set */\n");
     continue;
     }
 
@@ -819,7 +838,11 @@ else if (isgroup)
             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;
@@ -935,6 +958,25 @@ if (have_auth)
     "#define SUPPORT_CRYPTEQ\n");
   }
 
+/* Check poll() for timer functionality.
+Some OS' have released with it broken. */
+
+  {
+  struct timeval before, after;
+  int rc;
+  size_t us;
+
+  gettimeofday(&before, NULL);
+  rc = 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 */
 
 fprintf(new, "\n/* End of config.h */\n");