From ca397aa5b00e320e2bae7a6e3ed000eaa240e635 Mon Sep 17 00:00:00 2001
From: Julien Pichon <julienpichon7@gmail.com>
Date: Sat, 13 Jun 2009 16:45:09 -0700
Subject: [PATCH] Tilde expansion without globals

---
 src/ChangeLog |  6 +++++
 src/init.c    | 74 +++++++++++++++++++++++++++------------------------
 2 files changed, 45 insertions(+), 35 deletions(-)

diff --git a/src/ChangeLog b/src/ChangeLog
index 58e44a87..e519a21c 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,9 @@
+2009-06-13  Julien Pichon  <julienpichon7@gmail.com>
+
+	* init.c: Handle tilde-expansion in wgetrc commands, without
+	resorting to setting/unsetting globals to change behavior in one
+	call location.
+
 2009-06-12  Micah Cowan  <micah@cowan.name>
 
 	* host.c: Include <sys/types.h> before <sys/socket.h>. Not
diff --git a/src/init.c b/src/init.c
index 5bed28f6..da900cce 100644
--- a/src/init.c
+++ b/src/init.c
@@ -58,11 +58,6 @@ as that of the covered work.  */
 #include "test.h"
 #endif
 
-/* We want tilde expansion enabled only when reading `.wgetrc' lines;
-   otherwise, it will be performed by the shell.  This variable will
-   be set by the wgetrc-reading function.  */
-
-static bool enable_tilde_expansion;
 
 
 #define CMD_DECLARE(func) static bool func (const char *, const char *, void *)
@@ -473,6 +468,7 @@ enum parse_line {
 
 static enum parse_line parse_line (const char *, char **, char **, int *);
 static bool setval_internal (int, const char *, const char *);
+static bool setval_internal_wrapper (int, const char *, const char *);
 
 /* Initialize variables from a wgetrc file.  Returns zero (failure) if
    there were errors in the file.  */
@@ -492,7 +488,6 @@ run_wgetrc (const char *file)
                file, strerror (errno));
       return true;                      /* not a fatal error */
     }
-  enable_tilde_expansion = true;
   ln = 1;
   while ((line = read_whole_line (fp)) != NULL)
     {
@@ -504,7 +499,7 @@ run_wgetrc (const char *file)
         {
         case line_ok:
           /* If everything is OK, set the value.  */
-          if (!setval_internal (comind, com, val))
+          if (!setval_internal_wrapper (comind, com, val))
             {
               fprintf (stderr, _("%s: Error in %s at line %d.\n"),
                        exec_name, file, ln);
@@ -531,7 +526,6 @@ run_wgetrc (const char *file)
       xfree (line);
       ++ln;
     }
-  enable_tilde_expansion = false;
   fclose (fp);
 
   return errcnt == 0;
@@ -668,6 +662,12 @@ parse_line (const char *line, char **com, char **val, int *comind)
   return line_ok;
 }
 
+#if defined(WINDOWS) || defined(MSDOS)
+# define ISSEP(c) ((c) == '/' || (c) == '\\')
+#else
+# define ISSEP(c) ((c) == '/')
+#endif
+
 /* Run commands[comind].action. */
 
 static bool
@@ -678,6 +678,36 @@ setval_internal (int comind, const char *com, const char *val)
   return commands[comind].action (com, val, commands[comind].place);
 }
 
+static bool
+setval_internal_wrapper (int comind, const char *com, const char *val)
+{
+  bool ret;
+  int homelen;
+  char *home;
+  char **pstring;
+  ret = setval_internal (comind, com, val);
+
+  /* We make tilde expansion for cmd_file and cmd_directory */
+  if (((commands[comind].action == cmd_file) ||
+       (commands[comind].action == cmd_directory)) && ret)
+    {
+      pstring = commands[comind].place;
+      home = home_dir();
+      if (home)
+	{
+	  homelen = strlen(home);
+	  while (homelen && ISSEP(home[homelen - 1]))
+            home[--homelen] = '\0';
+
+	  /* Skip the leading "~/". */
+	  for (++val; ISSEP(*val); val++)
+  	    ;
+	  *pstring = concat_strings (home, "/", val, (char *)0);
+	}
+    }
+  return ret;
+}
+
 /* Run command COM with value VAL.  If running the command produces an
    error, report the error and exit.
 
@@ -813,11 +843,6 @@ cmd_string (const char *com, const char *val, void *place)
   return true;
 }
 
-#if defined(WINDOWS) || defined(MSDOS)
-# define ISSEP(c) ((c) == '/' || (c) == '\\')
-#else
-# define ISSEP(c) ((c) == '/')
-#endif
 
 /* Like the above, but handles tilde-expansion when reading a user's
    `.wgetrc'.  In that case, and if VAL begins with `~', the tilde
@@ -831,28 +856,7 @@ cmd_file (const char *com, const char *val, void *place)
 
   /* #### If VAL is empty, perhaps should set *PLACE to NULL.  */
 
-  if (!enable_tilde_expansion || !(*val == '~' && ISSEP (val[1])))
-    {
-    noexpand:
-      *pstring = xstrdup (val);
-    }
-  else
-    {
-      int homelen;
-      char *home = home_dir ();
-      if (!home)
-        goto noexpand;
-
-      homelen = strlen (home);
-      while (homelen && ISSEP (home[homelen - 1]))
-        home[--homelen] = '\0';
-
-      /* Skip the leading "~/". */
-      for (++val; ISSEP (*val); val++)
-        ;
-
-      *pstring = concat_strings (home, "/", val, (char *) 0);
-    }
+  *pstring = xstrdup (val);
 
 #if defined(WINDOWS) || defined(MSDOS)
   /* Convert "\" to "/". */
-- 
2.39.2