[patch] new preexec patch

bash-preexec-gentoo.diff (text/plain), 4.66 KB, created by Andrea Barisani (RETIRED) on 2005-05-08 04:14:15 UTC

diff -ruN bash-origfiles/doc/bash.1 bash-preexec/doc/bash.1
--- bash-origfiles/doc/bash.1	2004-07-12 17:27:08.000000000 +0200
+++ bash-preexec/doc/bash.1	2005-05-08 12:45:32.000000000 +0200
@@ -1550,6 +1550,12 @@
 .if t \f(CW".:~:/usr"\fP.
 .if n ".:~:/usr".
 .TP
+.B PREEXEC_CMD
+Is set before a command is run, each array field corresponds to one argument
+of the command line. It is intended to be used in PREEXEC_COMMAND scripts.
+In case of pipe-commands the command line of the last command in the
+pipe-chain is stored in PREEXEC_CMD.
+.TP
 .B COLUMNS
 Used by the \fBselect\fP builtin command to determine the terminal width
 when printing selection lists.  Automatically set upon receipt of a SIGWINCH.
@@ -1834,6 +1840,10 @@
 .if n \fIset -o posix\fP
 had been executed.
 .TP
+.B PREEXEC_COMMAND
+If set, the value is executed as a command prior to executing entered
+commands in interactive mode
+.TP
 .B PROMPT_COMMAND
 If set, the value is executed as a command prior to issuing each primary
 prompt.
diff -ruN bash-origfiles/doc/bashref.texi bash-preexec/doc/bashref.texi
--- bash-origfiles/doc/bashref.texi	2004-06-26 20:26:07.000000000 +0200
+++ bash-preexec/doc/bashref.texi	2005-05-08 12:45:32.000000000 +0200
@@ -4178,6 +4178,12 @@
 A colon-separated list of directories used as a search path for
 the @code{cd} builtin command.
 
+@item PREEXEC_CMD
+Is set before a command is run, each array field corresponds to one argument
+of the command line. It is intended to be used in @env{PREEXEC_COMMAND} scripts.
+In case of pipe-commands the command line of the last command in the
+pipe-chain is stored in @env{PREEXEC_CMD}.
+
 @item HOME
 The current user's home directory; the default for the @code{cd} builtin
 command.
@@ -4619,6 +4625,10 @@
 The process @sc{id} of the shell's parent process.  This variable
 is readonly.
 
+@item PREEXEC_COMMAND
+If set, the value is executed as a command prior to executing entered
+commands in interactive mode.
+
 @item PROMPT_COMMAND
 If set, the value is interpreted as a command to execute
 before the printing of each primary prompt (@env{$PS1}).
diff -ruN bash-origfiles/eval.c bash-preexec/eval.c
--- bash-origfiles/eval.c	2003-12-19 05:44:15.000000000 +0100
+++ bash-preexec/eval.c	2005-05-08 12:46:38.000000000 +0200
@@ -142,6 +142,8 @@
 	      current_command_number++;
 
 	      executing = 1;
+	      export_command(current_command);
+	      preexec_command ();
 	      stdin_redir = 0;
 	      execute_command (current_command);
 
@@ -226,6 +228,27 @@
   return (r);
 }
 
+/* This is where PREEXEC_COMMAND is executed */
+
+void
+preexec_command ()
+{
+  char *command_to_execute;
+
+  need_here_doc = 0;
+  run_pending_traps ();
+
+  if (interactive && bash_input.type != st_string)
+    {
+      command_to_execute = get_string_value ("PREEXEC_COMMAND");
+      if (command_to_execute)
+	execute_prompt_command (command_to_execute);
+
+      if (running_under_emacs == 2)
+	send_pwd_to_eterm ();	/* Yuck */
+    }
+}
+
 /* Read and parse a command, returning the status of the parse.  The command
    is left in the globval variable GLOBAL_COMMAND for use by reader_loop.
    This is where the shell timeout code is executed. */
@@ -272,3 +295,48 @@
 
   return (result);
 }
+
+/* export_command makes an array "PREEXEC_CMD" and fills its fields
+   with the command line of "command" (only for cm_simple,
+   for cm_connection the last command in the chain is used */
+
+void
+export_command (command)
+	COMMAND *command;
+{
+	int i = 0;
+	SHELL_VAR *cmd_var;
+	ARRAY *cmd_array;
+	WORD_LIST *list;
+
+	if(command->type == cm_simple)
+		list = command->value.Simple->words;
+	else if(command->type == cm_connection)
+	{
+		if(!command->value.Connection->second)
+			return;
+		if(command->flags == CMD_FORCE_SUBSHELL)
+			command = command->value.Connection->first;
+			return;
+		while(command->type == cm_connection)
+			command = command->value.Connection->second;
+		if(command->type == cm_simple)
+			list = command->value.Simple->words;
+		else
+			return;
+	}
+	else
+		return;
+	
+	cmd_var = make_new_array_variable ("PREEXEC_CMD");
+	cmd_array = array_cell (cmd_var);
+
+	while(list)
+	{
+		array_insert (cmd_array, i, list->word->word);
+		list=list->next;
+		i++;
+	}
+
+	VSETATTR (cmd_var, (att_exported));
+}
diff -ruN bash-origfiles/externs.h bash-preexec/externs.h
--- bash-origfiles/externs.h	2004-04-13 05:30:08.000000000 +0200
+++ bash-preexec/externs.h	2005-05-08 12:45:32.000000000 +0200
@@ -84,6 +84,8 @@
 extern int reader_loop __P((void));
 extern int parse_command __P((void));
 extern int read_command __P((void));
+extern void export_command __P((COMMAND *));
+extern void preexec_command __P((void)); 
 
 /* Functions from braces.c. */
 #if defined (BRACE_EXPANSION)