The amazing disappearing and reappearing patch... This time with documentation explaining it.
git-svn-id: http://svn.digium.com/svn/asterisk/trunk@6821 f38db490-d61c-443f-a65b-d21fe96a405b
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@ -66,6 +66,34 @@ value "blabla".
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In fact, everything contained ${here} is just replaced with the value of
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the variable "here".
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____________________
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VARIABLE INHERITANCE
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--------------------
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Variable names which are prefixed by "_" will be inherited to channels
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that are created in the process of servicing the original channel in
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which the variable was set. When the inheritance takes place, the
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prefix will be removed in the channel inheriting the variable. If the
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name is prefixed by "__" in the channel, then the variable is
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inherited and the "__" will remain intact in the new channel.
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In the dialplan, all references to these variables refer to the same
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variable, regardless of having a prefix or not. Note that setting any
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version of the variable removes any other version of the variable,
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regardless of prefix.
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Example:
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Set(__FOO=bar) ; Sets an inherited version of "FOO" variable
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Set(FOO=bar) ; Removes the inherited version and sets a local
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; variable.
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However,
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NoOp(${__FOO}) is identical to NoOp(${FOO})
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_______________________________
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REMOVING CHARACTERS FROM STRING
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-------------------------------
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10
pbx.c
10
pbx.c
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@ -5885,14 +5885,22 @@ void pbx_builtin_setvar_helper(struct ast_channel *chan, const char *name, const
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{
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struct ast_var_t *newvariable;
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struct varshead *headp;
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const char *nametail = name;
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if (name[strlen(name)-1] == ')')
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return ast_func_write(chan, name, value);
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headp = (chan) ? &chan->varshead : &globals;
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/* For comparison purposes, we have to strip leading underscores */
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if (*nametail == '_') {
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nametail++;
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if (*nametail == '_')
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nametail++;
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}
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AST_LIST_TRAVERSE (headp, newvariable, entries) {
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if (strcasecmp(ast_var_name(newvariable), name) == 0) {
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if (strcasecmp(ast_var_name(newvariable), nametail) == 0) {
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/* there is already such a variable, delete it */
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AST_LIST_REMOVE(headp, newvariable, entries);
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ast_var_delete(newvariable);
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