Add priv.c: reworked version of priv dropping code

[exim.git] / src / src / functions.h

diff --git a/src/src/functions.h b/src/src/functions.h
index 83fad740b9f8ff92bae6c7450b1f570460ef85bb..459a707a1193150bbeb7ee3df012b3b51d772476 100644 (file)
--- a/src/src/functions.h
+++ b/src/src/functions.h
@@ -371,16 +371,18 @@ extern FILE   *modefopen(const uschar *, const char *, mode_t);
 
 extern int     open_cutthrough_connection( address_item * addr );
 
-extern uschar *parse_extract_address(uschar *, uschar **, int *, int *, int *,
+extern uschar *parse_extract_address(const uschar *, uschar **, int *, int *, int *,
                  BOOL);
 extern int     parse_forward_list(uschar *, int, address_item **, uschar **,
                  const uschar *, uschar *, error_block **);
 extern uschar *parse_find_address_end(uschar *, BOOL);
-extern uschar *parse_find_at(uschar *);
+extern const uschar *parse_find_at(const uschar *);
 extern const uschar *parse_fix_phrase(const uschar *, int);
-extern uschar *parse_message_id(uschar *, uschar **, uschar **);
+extern const uschar *parse_message_id(const uschar *, uschar **, uschar **);
 extern const uschar *parse_quote_2047(const uschar *, int, uschar *, BOOL);
-extern uschar *parse_date_time(uschar *str, time_t *t);
+extern const uschar *parse_date_time(const uschar *str, time_t *t);
+extern void priv_drop_temp(const uid_t, const gid_t);
+extern void priv_restore(void);
 extern int     vaguely_random_number(int);
 #ifndef DISABLE_TLS
 extern int     vaguely_random_number_fallback(int);
@@ -408,7 +410,7 @@ extern void    readconf_driver_init(uschar *, driver_instance **,
 extern uschar *readconf_find_option(void *);
 extern void    readconf_main(BOOL);
 extern void    readconf_options_from_list(optionlist *, unsigned, const uschar *, uschar *);
-extern BOOL    readconf_print(uschar *, uschar *, BOOL);
+extern BOOL    readconf_print(const uschar *, uschar *, BOOL);
 extern uschar *readconf_printtime(int);
 extern uschar *readconf_readname(uschar *, int, uschar *);
 extern int     readconf_readtime(const uschar *, int, BOOL);
@@ -434,14 +436,14 @@ extern retry_config *retry_find_config(const uschar *, const uschar *, int, int)
 extern BOOL    retry_ultimate_address_timeout(uschar *, const uschar *,
                  dbdata_retry *, time_t);
 extern void    retry_update(address_item **, address_item **, address_item **);
-extern uschar *rewrite_address(uschar *, BOOL, BOOL, rewrite_rule *, int);
-extern uschar *rewrite_address_qualify(uschar *, BOOL);
+extern const uschar *rewrite_address(const uschar *, BOOL, BOOL, rewrite_rule *, int);
+extern const uschar *rewrite_address_qualify(const uschar *, BOOL);
 extern header_line *rewrite_header(header_line *,
                const uschar *, const uschar *,
                rewrite_rule *, int, BOOL);
-extern uschar *rewrite_one(uschar *, int, BOOL *, BOOL, uschar *,
+extern const uschar *rewrite_one(const uschar *, int, BOOL *, BOOL, uschar *,
                  rewrite_rule *);
-extern void    rewrite_test(uschar *);
+extern void    rewrite_test(const uschar *);
 extern uschar *rfc2047_decode2(uschar *, BOOL, uschar *, int, int *, int *,
                  uschar **);
 extern int     route_address(address_item *, address_item **, address_item **,
@@ -593,8 +595,11 @@ extern BOOL    transport_check_waiting(const uschar *, const uschar *, int, usch
 extern void    transport_init(void);
 extern void    transport_do_pass_socket(const uschar *, const uschar *,
                 const uschar *, uschar *, int);
-extern BOOL    transport_pass_socket(const uschar *, const uschar *, const uschar *, uschar *,
-                 int);
+extern BOOL    transport_pass_socket(const uschar *, const uschar *, const uschar *, uschar *, int
+#ifdef EXPERIMENTAL_ESMTP_LIMITS
+                       , unsigned, unsigned, unsigned
+#endif
+                       );
 extern uschar *transport_rcpt_address(address_item *, BOOL);
 extern BOOL    transport_set_up_command(const uschar ***, uschar *,
                 BOOL, int, address_item *, uschar *, uschar **);
@@ -606,9 +611,9 @@ extern BOOL    transport_headers_send(transport_ctx *,
                  BOOL (*)(transport_ctx *, uschar *, int));
 extern gstring * transport_show_supported(gstring *);
 extern BOOL    transport_write_message(transport_ctx *, int);
-extern void    tree_add_duplicate(uschar *, address_item *);
-extern void    tree_add_nonrecipient(uschar *);
-extern void    tree_add_unusable(host_item *);
+extern void    tree_add_duplicate(const uschar *, address_item *);
+extern void    tree_add_nonrecipient(const uschar *);
+extern void    tree_add_unusable(const host_item *);
 extern void    tree_dup(tree_node **, tree_node *);
 extern int     tree_insertnode(tree_node **, tree_node *);
 extern tree_node *tree_search(tree_node *, const uschar *);
@@ -966,6 +971,7 @@ g->s = s;
 }
 
 
+# ifndef COMPILE_UTILITY
 /******************************************************************************/
 /* Use store_malloc for DNSA structs, and explicit frees. Using the same pool
 for them as the strings we proceed to copy from them meant they could not be
@@ -993,7 +999,6 @@ store_free_3(dnsa, CCS func, line);
 /******************************************************************************/
 /* Routines with knowledge of spool layout */
 
-# ifndef COMPILE_UTILITY
 static inline void
 spool_pname_buf(uschar * buf, int len)
 {
@@ -1059,18 +1064,25 @@ subdir_str[1] = '\0';
 /******************************************************************************/
 /* Time calculations */
 
+/* Diff two times (later, earlier) returning diff in 1st arg */
 static inline void
-timesince(struct timeval * diff, const struct timeval * then)
+timediff(struct timeval * later, const struct timeval * earlier)
 {
-gettimeofday(diff, NULL);
-diff->tv_sec -= then->tv_sec;
-if ((diff->tv_usec -= then->tv_usec) < 0)
+later->tv_sec -= earlier->tv_sec;
+if ((later->tv_usec -= earlier->tv_usec) < 0)
   {
-  diff->tv_sec--;
-  diff->tv_usec += 1000*1000;
+  later->tv_sec--;
+  later->tv_usec += 1000*1000;
   }
 }
 
+static inline void
+timesince(struct timeval * diff, const struct timeval * then)
+{
+gettimeofday(diff, NULL);
+timediff(diff, then);
+}
+
 static inline uschar *
 string_timediff(const struct timeval * diff)
 {