/* Handle lists of commands, their decoding and documentation, for GDB.
- Copyright 1986, 1989, 1990, 1991, 1998 Free Software Foundation, Inc.
+ Copyright 1986, 1989, 1990, 1991, 1998, 2000 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#include "value.h"
#include <ctype.h>
#include "gdb_string.h"
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
+#ifdef UI_OUT
+#include "ui-out.h"
#endif
-#ifdef HAVE_WAIT_H
-#include <wait.h>
-#else
-#ifdef HAVE_SYS_WAIT_H
-#include <sys/wait.h>
-#endif
+#include "gdb_wait.h"
+#include "gnu-regex.h"
+/* FIXME: this should be auto-configured! */
+#ifdef __MSDOS__
+# define CANT_FORK
#endif
-#include "wait.h"
-
/* Prototypes for local functions */
static void undef_cmd_error PARAMS ((char *, char *));
static void show_user PARAMS ((char *, int));
-static void show_user_1 PARAMS ((struct cmd_list_element *, GDB_FILE *));
+static void show_user_1 (struct cmd_list_element *, struct ui_file *);
static void make_command PARAMS ((char *, int));
static int parse_binary_operation PARAMS ((char *));
-static void print_doc_line PARAMS ((GDB_FILE *, char *));
+static void print_doc_line (struct ui_file *, char *);
static struct cmd_list_element *find_cmd PARAMS ((char *command,
int len,
struct cmd_list_element * clist,
int ignore_help_classes,
int *nfound));
+static void apropos_cmd_helper (struct ui_file *, struct cmd_list_element *,
+ struct re_pattern_buffer *, char *);
+
+static void help_all (struct ui_file *stream);
+
+void apropos_command (char *, int);
void _initialize_command PARAMS ((void));
c->class = class;
c->function.cfunc = fun;
c->doc = doc;
+ c->flags = 0;
+ c->replacement = NULL;
c->hook = NULL;
c->prefixlist = NULL;
c->prefixname = NULL;
return c;
}
+
+/* Deprecates a command CMD.
+ REPLACEMENT is the name of the command which should be used in place
+ of this command, or NULL if no such command exists.
+
+ This function does not check to see if command REPLACEMENT exists
+ since gdb may not have gotten around to adding REPLACEMENT when this
+ function is called.
+
+ Returns a pointer to the deprecated command. */
+
+struct cmd_list_element *
+deprecate_cmd (cmd, replacement)
+ struct cmd_list_element *cmd;
+ char *replacement;
+{
+ cmd->flags |= (CMD_DEPRECATED | DEPRECATED_WARN_USER);
+
+ if (replacement != NULL)
+ cmd->replacement = replacement;
+ else
+ cmd->replacement = NULL;
+
+ return cmd;
+}
+
+
/* Same as above, except that the abbrev_flag is set. */
#if 0 /* Currently unused */
c = c->next;
}
}
+/* Recursively walk the commandlist structures, and print out the
+ documentation of commands that match our regex in either their
+ name, or their documentation.
+*/
+static void
+apropos_cmd_helper (struct ui_file *stream, struct cmd_list_element *commandlist,
+ struct re_pattern_buffer *regex, char *prefix)
+{
+ register struct cmd_list_element *c;
+ int returnvalue=1; /*Needed to avoid double printing*/
+ /* Walk through the commands */
+ for (c=commandlist;c;c=c->next)
+ {
+ if (c->name != NULL)
+ {
+ /* Try to match against the name*/
+ returnvalue=re_search(regex,c->name,strlen(c->name),0,strlen(c->name),NULL);
+ if (returnvalue >= 0)
+ {
+ /* Stolen from help_cmd_list. We don't directly use
+ * help_cmd_list because it doesn't let us print out
+ * single commands
+ */
+ fprintf_filtered (stream, "%s%s -- ", prefix, c->name);
+ print_doc_line (stream, c->doc);
+ fputs_filtered ("\n", stream);
+ returnvalue=0; /*Set this so we don't print it again.*/
+ }
+ }
+ if (c->doc != NULL && returnvalue != 0)
+ {
+ /* Try to match against documentation */
+ if (re_search(regex,c->doc,strlen(c->doc),0,strlen(c->doc),NULL) >=0)
+ {
+ /* Stolen from help_cmd_list. We don't directly use
+ * help_cmd_list because it doesn't let us print out
+ * single commands
+ */
+ fprintf_filtered (stream, "%s%s -- ", prefix, c->name);
+ print_doc_line (stream, c->doc);
+ fputs_filtered ("\n", stream);
+ }
+ }
+ /* Check if this command has subcommands */
+ if (c->prefixlist != NULL)
+ {
+ /* Recursively call ourselves on the subcommand list,
+ passing the right prefix in.
+ */
+ apropos_cmd_helper(stream,*c->prefixlist,regex,c->prefixname);
+ }
+ }
+}
+/* Search through names of commands and documentations for a certain
+ regular expression.
+*/
+void
+apropos_command (char *searchstr, int from_tty)
+{
+ extern struct cmd_list_element *cmdlist; /*This is the main command list*/
+ regex_t pattern;
+ char *pattern_fastmap;
+ char errorbuffer[512];
+ pattern_fastmap=calloc(256,sizeof(char));
+ if (searchstr == NULL)
+ error("REGEXP string is empty");
+
+ if (regcomp(&pattern,searchstr,REG_ICASE) == 0)
+ {
+ pattern.fastmap=pattern_fastmap;
+ re_compile_fastmap(&pattern);
+ apropos_cmd_helper(gdb_stdout,cmdlist,&pattern,"");
+ }
+ else
+ {
+ regerror(regcomp(&pattern,searchstr,REG_ICASE),NULL,errorbuffer,512);
+ error("Error in regular expression:%s",errorbuffer);
+ }
+ free(pattern_fastmap);
+}
+
/* This command really has to deal with two things:
* 1) I want documentation on *this string* (usually called by
void
help_cmd (command, stream)
char *command;
- GDB_FILE *stream;
+ struct ui_file *stream;
{
struct cmd_list_element *c;
extern struct cmd_list_element *cmdlist;
return;
}
+ if (strcmp (command, "all") == 0)
+ {
+ help_all (stream);
+ return;
+ }
+
c = lookup_cmd (&command, cmdlist, "", 0, 0);
if (c == 0)
struct cmd_list_element *list;
char *cmdtype;
enum command_class class;
- GDB_FILE *stream;
+ struct ui_file *stream;
{
int len;
char *cmdtype1, *cmdtype2;
cmdtype1, cmdtype2);
}
+static void
+help_all (struct ui_file *stream)
+{
+ struct cmd_list_element *c;
+ extern struct cmd_list_element *cmdlist;
+
+ for (c = cmdlist; c; c = c->next)
+ {
+ if (c->abbrev_flag)
+ continue;
+ /* If this is a prefix command, print it's subcommands */
+ if (c->prefixlist)
+ help_cmd_list (*c->prefixlist, all_commands, c->prefixname, 0, stream);
+
+ /* If this is a class name, print all of the commands in the class */
+ else if (c->function.cfunc == NULL)
+ help_cmd_list (cmdlist, c->class, "", 0, stream);
+ }
+}
+
/* Print only the first line of STR on STREAM. */
static void
print_doc_line (stream, str)
- GDB_FILE *stream;
+ struct ui_file *stream;
char *str;
{
static char *line_buffer = 0;
line_buffer[p - str] = '\0';
if (islower (line_buffer[0]))
line_buffer[0] = toupper (line_buffer[0]);
+#ifdef UI_OUT
+ ui_out_text (uiout, line_buffer);
+#else
fputs_filtered (line_buffer, stream);
+#endif
}
/*
enum command_class class;
char *prefix;
int recurse;
- GDB_FILE *stream;
+ struct ui_file *stream;
{
register struct cmd_list_element *c;
char *p, *command;
int len, tmp, nfound;
struct cmd_list_element *found, *c;
+ char *line = *text;
while (**text == ' ' || **text == '\t')
(*text)++;
*text = p;
- /* If this was an abbreviation, use the base command instead. */
-
if (found->cmd_pointer)
- found = found->cmd_pointer;
-
+ {
+ /* We drop the alias (abbreviation) in favor of the command it is
+ pointing to. If the alias is deprecated, though, we need to
+ warn the user about it before we drop it. Note that while we
+ are warning about the alias, we may also warn about the command
+ itself and we will adjust the appropriate DEPRECATED_WARN_USER
+ flags */
+
+ if (found->flags & DEPRECATED_WARN_USER)
+ deprecated_cmd_warning (&line);
+ found = found->cmd_pointer;
+ }
/* If we found a prefix command, keep looking. */
if (found->prefixlist)
return 0;
}
+/* We are here presumably because an alias or command in *TEXT is
+ deprecated and a warning message should be generated. This function
+ decodes *TEXT and potentially generates a warning message as outlined
+ below.
+
+ Example for 'set endian big' which has a fictitious alias 'seb'.
+
+ If alias wasn't used in *TEXT, and the command is deprecated:
+ "warning: 'set endian big' is deprecated."
+
+ If alias was used, and only the alias is deprecated:
+ "warning: 'seb' an alias for the command 'set endian big' is deprecated."
+
+ If alias was used and command is deprecated (regardless of whether the
+ alias itself is deprecated:
+
+ "warning: 'set endian big' (seb) is deprecated."
+
+ After the message has been sent, clear the appropriate flags in the
+ command and/or the alias so the user is no longer bothered.
+
+*/
+void
+deprecated_cmd_warning (char **text)
+{
+ struct cmd_list_element *alias = NULL;
+ struct cmd_list_element *prefix_cmd = NULL;
+ struct cmd_list_element *cmd = NULL;
+ struct cmd_list_element *c;
+ char *type;
+
+ if (!lookup_cmd_composition (*text, &alias, &prefix_cmd, &cmd))
+ /* return if text doesn't evaluate to a command */
+ return;
+
+ if (!((alias ? (alias->flags & DEPRECATED_WARN_USER) : 0)
+ || (cmd->flags & DEPRECATED_WARN_USER) ) )
+ /* return if nothing is deprecated */
+ return;
+
+ printf_filtered ("Warning:");
+
+ if (alias && !(cmd->flags & CMD_DEPRECATED))
+ printf_filtered (" '%s', an alias for the", alias->name);
+
+ printf_filtered (" command '");
+
+ if (prefix_cmd)
+ printf_filtered ("%s", prefix_cmd->prefixname);
+
+ printf_filtered ("%s", cmd->name);
+
+ if (alias && (cmd->flags & CMD_DEPRECATED))
+ printf_filtered ("' (%s) is deprecated.\n", alias->name);
+ else
+ printf_filtered ("' is deprecated.\n");
+
+
+ /* if it is only the alias that is deprecated, we want to indicate the
+ new alias, otherwise we'll indicate the new command */
+
+ if (alias && !(cmd->flags & CMD_DEPRECATED))
+ {
+ if (alias->replacement)
+ printf_filtered ("Use '%s'.\n\n", alias->replacement);
+ else
+ printf_filtered ("No alternative known.\n\n");
+ }
+ else
+ {
+ if (cmd->replacement)
+ printf_filtered ("Use '%s'.\n\n", cmd->replacement);
+ else
+ printf_filtered ("No alternative known.\n\n");
+ }
+
+ /* We've warned you, now we'll keep quiet */
+ if (alias)
+ alias->flags &= ~DEPRECATED_WARN_USER;
+
+ cmd->flags &= ~DEPRECATED_WARN_USER;
+}
+
+
+
+/* Look up the contents of LINE as a command in the command list 'cmdlist'.
+ Return 1 on success, 0 on failure.
+
+ If LINE refers to an alias, *alias will point to that alias.
+
+ If LINE is a postfix command (i.e. one that is preceeded by a prefix
+ command) set *prefix_cmd.
+
+ Set *cmd to point to the command LINE indicates.
+
+ If any of *alias, *prefix_cmd, or *cmd cannot be determined or do not
+ exist, they are NULL when we return.
+
+*/
+int
+lookup_cmd_composition (char *text,
+ struct cmd_list_element **alias,
+ struct cmd_list_element **prefix_cmd,
+ struct cmd_list_element **cmd)
+{
+ char *p, *command;
+ int len, tmp, nfound;
+ struct cmd_list_element *cur_list;
+ struct cmd_list_element *prev_cmd;
+ *alias = NULL;
+ *prefix_cmd = NULL;
+ *cmd = NULL;
+
+ cur_list = cmdlist;
+
+ while (1)
+ {
+ /* Go through as many command lists as we need to
+ to find the command TEXT refers to. */
+
+ prev_cmd = *cmd;
+
+ while (*text == ' ' || *text == '\t')
+ (text)++;
+
+ /* Treating underscores as part of command words is important
+ so that "set args_foo()" doesn't get interpreted as
+ "set args _foo()". */
+ for (p = text;
+ *p && (isalnum (*p) || *p == '-' || *p == '_' ||
+ (tui_version &&
+ (*p == '+' || *p == '<' || *p == '>' || *p == '$')) ||
+ (xdb_commands && (*p == '!' || *p == '/' || *p == '?')));
+ p++)
+ ;
+
+ /* If nothing but whitespace, return. */
+ if (p == text)
+ return 0;
+
+ len = p - text;
+
+ /* text and p now bracket the first command word to lookup (and
+ it's length is len). We copy this into a local temporary */
+
+ command = (char *) alloca (len + 1);
+ for (tmp = 0; tmp < len; tmp++)
+ {
+ char x = text[tmp];
+ command[tmp] = x;
+ }
+ command[len] = '\0';
+
+ /* Look it up. */
+ *cmd = 0;
+ nfound = 0;
+ *cmd = find_cmd (command, len, cur_list, 1, &nfound);
+
+ /* We didn't find the command in the entered case, so lower case it
+ and search again.
+ */
+ if (!*cmd || nfound == 0)
+ {
+ for (tmp = 0; tmp < len; tmp++)
+ {
+ char x = command[tmp];
+ command[tmp] = isupper (x) ? tolower (x) : x;
+ }
+ *cmd = find_cmd (command, len, cur_list, 1, &nfound);
+ }
+
+ if (*cmd == (struct cmd_list_element *) -1)
+ {
+ return 0; /* ambiguous */
+ }
+
+ if (*cmd == NULL)
+ return 0; /* nothing found */
+ else
+ {
+ if ((*cmd)->cmd_pointer)
+ {
+ /* cmd was actually an alias, we note that an alias was used
+ (by assigning *alais) and we set *cmd.
+ */
+ *alias = *cmd;
+ *cmd = (*cmd)->cmd_pointer;
+ }
+ *prefix_cmd = prev_cmd;
+ }
+ if ((*cmd)->prefixlist)
+ cur_list = *(*cmd)->prefixlist;
+ else
+ return 1;
+
+ text = p;
+ }
+}
+
+
+
+
#if 0
/* Look up the contents of *LINE as a command in the command list LIST.
LIST is a chain of struct cmd_list_element's.
}
else if (c->type == show_cmd)
{
+#ifdef UI_OUT
+ struct cleanup *old_chain;
+ struct ui_stream *stb;
+ int quote;
+
+ stb = ui_out_stream_new (uiout);
+ old_chain = make_cleanup_ui_out_stream_delete (stb);
+#endif /* UI_OUT */
+
/* Print doc minus "show" at start. */
print_doc_line (gdb_stdout, c->doc + 5);
- fputs_filtered (" is ", gdb_stdout);
- wrap_here (" ");
+#ifdef UI_OUT
+ ui_out_text (uiout, " is ");
+ ui_out_wrap_hint (uiout, " ");
+ quote = 0;
switch (c->var_type)
{
case var_string:
{
unsigned char *p;
+ if (*(unsigned char **) c->var)
+ fputstr_filtered (*(unsigned char **) c->var, '"', stb->stream);
+ quote = 1;
+ }
+ break;
+ case var_string_noescape:
+ case var_filename:
+ case var_enum:
+ if (*(char **) c->var)
+ fputs_filtered (*(char **) c->var, stb->stream);
+ quote = 1;
+ break;
+ case var_boolean:
+ fputs_filtered (*(int *) c->var ? "on" : "off", stb->stream);
+ break;
+ case var_uinteger:
+ if (*(unsigned int *) c->var == UINT_MAX)
+ {
+ fputs_filtered ("unlimited", stb->stream);
+ break;
+ }
+ /* else fall through */
+ case var_zinteger:
+ fprintf_filtered (stb->stream, "%u", *(unsigned int *) c->var);
+ break;
+ case var_integer:
+ if (*(int *) c->var == INT_MAX)
+ {
+ fputs_filtered ("unlimited", stb->stream);
+ }
+ else
+ fprintf_filtered (stb->stream, "%d", *(int *) c->var);
+ break;
+
+ default:
+ error ("gdb internal error: bad var_type in do_setshow_command");
+ }
+ if (quote)
+ ui_out_text (uiout, "\"");
+ ui_out_field_stream (uiout, "value", stb);
+ if (quote)
+ ui_out_text (uiout, "\"");
+ ui_out_text (uiout, ".\n");
+ do_cleanups (old_chain);
+#else
+ fputs_filtered (" is ", gdb_stdout);
+ wrap_here (" ");
+ switch (c->var_type)
+ {
+ case var_string:
+ {
fputs_filtered ("\"", gdb_stdout);
if (*(unsigned char **) c->var)
fputstr_filtered (*(unsigned char **) c->var, '"', gdb_stdout);
error ("gdb internal error: bad var_type in do_setshow_command");
}
fputs_filtered (".\n", gdb_stdout);
+#endif
}
else
error ("gdb internal error: bad cmd_type in do_setshow_command");
int from_tty;
char *prefix;
{
+#ifdef UI_OUT
+ ui_out_list_begin (uiout, "showlist");
+#endif
for (; list != NULL; list = list->next)
{
/* If we find a prefix, run its list, prefixing our output by its
prefix (with "show " skipped). */
+#ifdef UI_OUT
+ if (list->prefixlist && !list->abbrev_flag)
+ {
+ ui_out_list_begin (uiout, "optionlist");
+ ui_out_field_string (uiout, "prefix", list->prefixname + 5);
+ cmd_show_list (*list->prefixlist, from_tty, list->prefixname + 5);
+ ui_out_list_end (uiout);
+ }
+ if (list->type == show_cmd)
+ {
+ ui_out_list_begin (uiout, "option");
+ ui_out_text (uiout, prefix);
+ ui_out_field_string (uiout, "name", list->name);
+ ui_out_text (uiout, ": ");
+ do_setshow_command ((char *) NULL, from_tty, list);
+ ui_out_list_end (uiout);
+ }
+#else
if (list->prefixlist && !list->abbrev_flag)
cmd_show_list (*list->prefixlist, from_tty, list->prefixname + 5);
if (list->type == show_cmd)
fputs_filtered (": ", gdb_stdout);
do_setshow_command ((char *) NULL, from_tty, list);
}
+#endif
}
+#ifdef UI_OUT
+ ui_out_list_end (uiout);
+#endif
}
/* ARGSUSED */
int from_tty;
{
#ifdef CANT_FORK
- /* FIXME: what about errors (I don't know how GO32 system() handles
- them)? */
- system (arg);
+ /* If ARG is NULL, they want an inferior shell, but `system' just
+ reports if the shell is available when passed a NULL arg. */
+ int rc = system (arg ? arg : "");
+
+ if (!arg)
+ arg = "inferior shell";
+
+ if (rc == -1)
+ {
+ fprintf_unfiltered (gdb_stderr, "Cannot execute %s: %s\n", arg,
+ safe_strerror (errno));
+ gdb_flush (gdb_stderr);
+ }
+ else if (rc)
+ {
+ fprintf_unfiltered (gdb_stderr, "%s exited with status %d\n", arg, rc);
+ gdb_flush (gdb_stderr);
+ }
+#ifdef __DJGPP__
+ /* Make sure to return to the directory GDB thinks it is, in case the
+ shell command we just ran changed it. */
+ chdir (current_directory);
+#endif
#else /* Can fork. */
int rc, status, pid;
char *p, *user_shell;
static void
show_user_1 (c, stream)
struct cmd_list_element *c;
- GDB_FILE *stream;
+ struct ui_file *stream;
{
register struct command_line *cmdlines;
fputs_filtered (c->name, stream);
fputs_filtered (":\n", stream);
+#ifdef UI_OUT
+ print_command_lines (uiout, cmdlines, 1);
+ fputs_filtered ("\n", stream);
+#else
while (cmdlines)
{
print_command_line (cmdlines, 4, stream);
cmdlines = cmdlines->next;
}
fputs_filtered ("\n", stream);
+#endif
}
/* ARGSUSED */
"Execute the rest of the line as a shell command. \n\
With no arguments, run an inferior shell.");
+ /* NOTE: cagney/2000-03-20: Being able to enter ``(gdb) !ls'' would
+ be a really useful feature. Unfortunatly, the below wont do
+ this. Instead it adds support for the form ``(gdb) ! ls''
+ (i.e. the space is required). If the ``!'' command below is
+ added the complains about no ``!'' command would be replaced by
+ complains about how the ``!'' command is broken :-) */
if (xdb_commands)
add_com_alias ("!", "shell", class_support, 0);
"Show definitions of user defined commands.\n\
Argument is the name of the user defined command.\n\
With no argument, show definitions of all user defined commands.", &showlist);
+ add_com ("apropos", class_support, apropos_command, "Search for commands matching a REGEXP");
}