X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?p=userv.git;a=blobdiff_plain;f=lexer.l.m4;h=7b42a1d33914f1678f5098402121c325e9445b6d;hp=2f360606017eb44ba2695832c90e79015f3d2f3e;hb=bc730637ae2abc44a1e1013bc64d85a92923cf6e;hpb=464d71c37246e556de9ec05f7b97af834a5224ee

diff --git a/lexer.l.m4 b/lexer.l.m4
index 2f36060..7b42a1d 100644
--- a/lexer.l.m4
+++ b/lexer.l.m4
@@ -1,7 +1,7 @@
 dnl  userv - lexer.l.m4
 dnl  lexer, passed through m4 with defs from langauge.i4
 /*
- *   Copyright (C)1996-1997 Ian Jackson
+ *   Copyright (C)1996-1997,1999 Ian Jackson
  *  
  *   This is free software; you can redistribute it and/or modify it
  *   under the terms of the GNU General Public License as published by
@@ -33,13 +33,16 @@ include(language.i4)
 #include <fnmatch.h>
 #include <limits.h>
 #include <dirent.h>
+#include <sys/types.h>
 #include <sys/stat.h>
 #include <time.h>
+#include <errno.h>
 
 #include "config.h"
 #include "common.h"
 #include "daemon.h"
 #include "lib.h"
+#include "both.h"
 #include "tokens.h"
 
 #define HYPHEN '-'
@@ -57,14 +60,17 @@ static directive_fnt dfi_includeuserrcfile, dfi_includeclientconfig;
 /* directive functions return:
  *  0 for success having scanned up to and including end of line but not beyond,
  *  or tokv_error or tokv_quit.
+ * They expect to parse the whitespace before their parameters (if any).
  */
 
-typedef int parmcondition_fnt(int ctoken, char **parmvalues, int *rtrue);
+typedef int parmcondition_fnt(int ctoken, char *const *parmvalues, int *rtrue);
 static parmcondition_fnt pcf_glob, pcf_range, pcf_grep;
 /* all conditional functions return tokv_error for failure or 0 for success
  *  at parsing and testing, in which case *rtrue is set to 0 or 1.
  *  On success they have scanned up to and including the condition's
- *  terminating newline.
+ *  terminating newline; the pcf_... functions expect to parse the whitespace
+ *  between the parameter name and the condition's arguments.
+ * Otherwise they return tokv_error.
  * The parameter-based conditionals take a list of parameter values
  * as obtained from the parameter functions and pa_parameter,
  * and do _not_ free it.
@@ -108,6 +114,7 @@ static int lr_fdwant_readwrite; /* -1=never, 0=opt, 1=always */
 struct parser_state {
   int lineno, reportlineno, notedreferer, isinternal;
   const char *filename;
+  struct stat filestab;
   YY_BUFFER_STATE ybuf;
   struct parser_state *upstate;
 };
@@ -116,7 +123,8 @@ static struct parser_state *cstate;
 
 struct error_handling {
   int handling; /* One of the error handling modes tokt_ehandlemode */
-  int logfacility, loglevel, filekeep;
+  int logfacility, loglevel;
+  int filekeep; /* File is in use by higher-level errors-push, leave it open */
   FILE *file;
   char *filename;
 };
@@ -124,9 +132,14 @@ struct error_handling {
 static struct error_handling eh = { tokv_word_errorstostderr, 0,0,0,0,0 };
 
 static int dequote(char *inplace);
+static void countnewlines(void);
+
+#define YY_NO_UNPUT
 
 %}
+
 %option noyywrap
+
 %%
 
 dnl simple words
@@ -141,47 +154,47 @@ changequote({*,*})
 			}
 [0-9]{1,8}-[0-9]{1,8}	{
 			  char *ep;
-			  lr_min=(int)strtoul(yytext,&ep,10);
+			  lr_min= (int)strtoul(yytext,&ep,10);
 			  assert(*ep == HYPHEN);
-			  assert(*++ep);
-			  lr_max=(int)strtoul(ep,&ep,10);
+			  ep++;  assert(*ep);
+			  lr_max= (int)strtoul(ep,&ep,10);
 			  assert(!*ep);
-			  if (lr_max < lr_min) {
-			    parseerrprint("fd range has min > max");
-			    return tokv_error;
-			  }
+			  if (lr_max < lr_min)
+			    return parseerrprint("fd range has min > max");
 			  return tokv_fdrange;
 			}
 [0-9]{1,8}-		{
 			  char *ep;
 			  lr_min= (int)strtoul(yytext,&ep,10);
 			  assert(*ep == HYPHEN);
-			  assert(!*++ep);
+			  ep++;  assert(!*ep);
 			  lr_max=-1;
 			  return tokv_fdstoend;
 			}
-[\ \t]+			return tokv_lwsp;
+([\ \t]*\\[\ \t]*\n[\ \t]*)+	countnewlines(); return tokv_lwsp;
+[\ \t]+				return tokv_lwsp;
 [\ \t]*\n		cstate->lineno++; return tokv_newline;
 [\ \t]*\#[^\n]*\n	cstate->lineno++; return tokv_newline;
-[\ \t]*\#[^\n]*		{
-			  parseerrprint("missing newline at eof after comment");
-			  return tokv_error;
-			}
-[^\ \t\n]+		return tokv_barestring;
-\"([^\\\"\n]|\\[a-z]|\\[0-9]{3}|\\x[0-9A-Fa-f]{2}|\\[:punct:]|\\[ \t]*\n)*\" {
+[\ \t]*\#[^\n]*		return parseerrprint("missing newline at eof after comment");
+\"([^\\\"\n]|\\[a-z]|\\[0-9]{3}|\\x[0-9A-Fa-f]{2}|\\[[:punct:]]|\\[ \t]*\n)*\" {
+			  countnewlines();
 			  return dequote(yytext);
 			}
-\".*    		{
-			  parseerrprint("misquoted or unterminated string");
-			  return tokv_error;
-			}
-<<EOF>>		        return tokv_eof;
+[^\ \t\n\\\"]+		return tokv_barestring;
+<<EOF>>			return tokv_eof;
+\"			return parseerrprint("misquoted or unterminated string");
+\\			return parseerrprint("unexpected backslash");
+.			abort(); /* expect lex warning "rule cannot be matched" */
 *}
 changequote(`,')
 %%
+
+const char *const builtinservicehelpstrings[]= {
+undivert(5)dnl
+   0
+};
 `
 #include "parser.c"
 '
 divert(-1)
 undivert
-