From: Jeremy Harris <jgh146exb@wizmail.org>
Date: Mon, 28 Jun 2021 18:49:00 +0000 (+0100)
Subject: Readonly-config: not supported by Solaris 10
X-Git-Tag: exim-4.95-RC0~8
X-Git-Url: https://git.exim.org/exim.git/commitdiff_plain/a57492a480bce6d41dec5255d4a55550aa9d4f87

Readonly-config: not supported by Solaris 10

Broken-by: 753739fdef
---

diff --git a/doc/doc-txt/ChangeLog b/doc/doc-txt/ChangeLog
index 3311ae8f5..cc589c567 100644
--- a/doc/doc-txt/ChangeLog
+++ b/doc/doc-txt/ChangeLog
@@ -318,6 +318,7 @@ JH/55 TLS: as server, reject connections with ALPN indicating non-smtp use.
 
 JH/56 Make the majority of info read from config files readonly, for defence-in-
       depth against exploits.  Suggestion by Qualsy.
+      Not supported on Solaris 10.
 
 
 Exim version 4.94
diff --git a/src/OS/os.h-SunOS5 b/src/OS/os.h-SunOS5
index f5bc31668..1ceafa701 100644
--- a/src/OS/os.h-SunOS5
+++ b/src/OS/os.h-SunOS5
@@ -38,6 +38,10 @@ it seems. */
 # define MISSING_UNSETENV_3
 #endif
 
+#if _POSIX_C_SOURCE < 200809L
+# define MISSING_POSIX_MEMALIGN
+#endif
+
 
 /* SunOS5 doesn't accept getcwd(NULL, 0) to auto-allocate
 a buffer */
diff --git a/src/src/store.c b/src/src/store.c
index ad4da3c2e..e8819e3e3 100644
--- a/src/src/store.c
+++ b/src/src/store.c
@@ -255,14 +255,11 @@ log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Taint mismatch, %s: %s %d\n",
 void
 store_writeprotect(int pool)
 {
+#if !defined(COMPILE_UTILITY) && !defined(MISSING_POSIX_MEMALIGN)
 for (storeblock * b = chainbase[pool]; b; b = b->next)
-  {
-#ifndef COMPILE_UTILITY
   if (mprotect(b, ALIGNED_SIZEOF_STOREBLOCK + b->length, PROT_READ) != 0)
-    DEBUG(D_any) debug_printf("config block mprotect: (%d) %s\n", errno, strerror(errno))
+    DEBUG(D_any) debug_printf("config block mprotect: (%d) %s\n", errno, strerror(errno));
 #endif
-    ;
-  }
 }
 
 /******************************************************************************/
@@ -346,12 +343,14 @@ if (size > yield_length[pool])
     if (++nblocks[pool] > maxblocks[pool])
       maxblocks[pool] = nblocks[pool];
 
+#ifndef MISSING_POSIX_MEMALIGN
     if (pool == POOL_CONFIG)
       {
       long pgsize = sysconf(_SC_PAGESIZE);
       posix_memalign((void **)&newblock, pgsize, (mlength + pgsize - 1) & ~(pgsize - 1));
       }
     else
+#endif
       newblock = internal_store_malloc(mlength, func, linenumber);
     newblock->next = NULL;
     newblock->length = length;