string.c: do not interpret '\\' before '\0' (CVE-2019-15846)

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

diff --git a/src/src/exim_dbmbuild.c b/src/src/exim_dbmbuild.c
index 3bb226611f8fd5f17cb3f0b4eb74f94abb45d400..6a14ab9a0d67c66d481a6da1e527f479af1a7778 100644 (file)
--- a/src/src/exim_dbmbuild.c
+++ b/src/src/exim_dbmbuild.c
@@ -32,6 +32,29 @@ characters. */
 
 uschar * spool_directory = NULL;       /* dummy for dbstuff.h */
 
+/******************************************************************************/
+                                       /* dummies needed by Solaris build */
+void *
+store_get_3(int size, BOOL tainted, const char *filename, int linenumber)
+{ return NULL; }
+void **
+store_reset_3(void **ptr, int pool, const char *filename, int linenumber)
+{ return NULL; }
+void
+store_release_above_3(void *ptr, const char *func, int linenumber)
+{ }
+gstring *
+string_vformat_trc(gstring * g, const uschar * func, unsigned line,
+  unsigned size_limit, unsigned flags, const char *format, va_list ap)
+{ return NULL; }
+uschar *
+string_sprintf_trc(const char * a, const uschar * b, unsigned c, ...)
+{ return NULL; }
+BOOL split_spool_directory;
+uschar * queue_name;
+/******************************************************************************/
+
+
 #define max_insize   20000
 #define max_outsize 100000
 
@@ -94,6 +117,7 @@ string_interpret_escape(const uschar **pp)
 int ch;
 const uschar *p = *pp;
 ch = *(++p);
+if (ch == '\0') return **pp;
 if (isdigit(ch) && ch != '8' && ch != '9')
   {
   ch -= '0';
@@ -204,14 +228,14 @@ if (strlen(argv[arg+1]) > sizeof(temp_dbmname) - 20)
   exit(1);
   }
 
-Ustrcpy(temp_dbmname, argv[arg+1]);
-Ustrcat(temp_dbmname, ".dbmbuild_temp");
+Ustrcpy(temp_dbmname, US argv[arg+1]);
+Ustrcat(temp_dbmname, US".dbmbuild_temp");
 
 Ustrcpy(dirname, temp_dbmname);
 if ((bptr = Ustrrchr(dirname, '/')))
   *bptr = '\0';
 else
-  Ustrcpy(dirname, ".");
+  Ustrcpy(dirname, US".");
 
 /* It is apparently necessary to open with O_RDWR for this to work
 with gdbm-1.7.3, though no reading is actually going to be done. */
@@ -432,7 +456,7 @@ if (yield == 0 || yield == 1)
 
   #if defined(USE_DB) || defined(USE_TDB) || defined(USE_GDBM)
   Ustrcpy(real_dbmname, temp_dbmname);
-  Ustrcpy(buffer, argv[arg+1]);
+  Ustrcpy(buffer, US argv[arg+1]);
   if (Urename(real_dbmname, buffer) != 0)
     {
     printf("Unable to rename %s as %s\n", real_dbmname, buffer);