+}
+
+static void *
+fgets_big_buffer(FILE *fp)
+{
+int len = 0;
+
+big_buffer[0] = 0;
+if (Ufgets(big_buffer, big_buffer_size, fp) == NULL) return NULL;
+
+while ((len = Ustrlen(big_buffer)) == big_buffer_size-1
+ && big_buffer[len-1] != '\n')
+ {
+ uschar *newbuffer;
+ int newsize;
+
+ if (big_buffer_size >= BIG_BUFFER_SIZE * 4) return NULL;
+ newsize = big_buffer_size * 2;
+ newbuffer = store_get_perm(newsize, FALSE);
+ memcpy(newbuffer, big_buffer, len);
+
+ big_buffer = newbuffer;
+ big_buffer_size = newsize;
+ if (Ufgets(big_buffer + len, big_buffer_size - len, fp) == NULL) return NULL;
+ }
+
+if (len <= 0 || big_buffer[len-1] != '\n') return NULL;
+return big_buffer;
+}
+
+
+
+/*************************************************
+* Read spool header file *
+*************************************************/
+
+/* This function reads a spool header file and places the data into the
+appropriate global variables. The header portion is always read, but header
+structures are built only if read_headers is set true. It isn't, for example,
+while generating -bp output.
+
+It may be possible for blocks of nulls (binary zeroes) to get written on the
+end of a file if there is a system crash during writing. It was observed on an
+earlier version of Exim that omitted to fsync() the files - this is thought to
+have been the cause of that incident, but in any case, this code must be robust
+against such an event, and if such a file is encountered, it must be treated as
+malformed.
+
+As called from deliver_message() (at least) we are running as root.
+
+Arguments:
+ name name of the header file, including the -H
+ read_headers TRUE if in-store header structures are to be built
+ subdir_set TRUE is message_subdir is already set
+
+Returns: spool_read_OK success
+ spool_read_notopen open failed
+ spool_read_enverror error in the envelope portion
+ spool_read_hdrerror error in the header portion
+*/
+
+int
+spool_read_header(uschar *name, BOOL read_headers, BOOL subdir_set)
+{
+FILE * fp = NULL;
+int n;
+int rcount = 0;
+long int uid, gid;
+BOOL inheader = FALSE;
+const uschar * where;
+
+/* Reset all the global variables to their default values. However, there is
+one exception. DO NOT change the default value of dont_deliver, because it may
+be forced by an external setting. */
+
+spool_clear_header_globals();
git://git.exim.org / exim.git / blobdiff