1 /* GDB CLI command scripting.
3 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
4 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 Free Software
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
26 #include "language.h" /* For value_true */
30 #include "gdb_string.h"
33 #include "cli/cli-cmds.h"
34 #include "cli/cli-decode.h"
35 #include "cli/cli-script.h"
39 extern void dont_repeat (void);
41 extern void do_restore_instream_cleanup (void *stream);
43 /* Prototypes for local functions */
45 static struct cleanup *
46 make_cleanup_free_command_lines (struct command_line **arg);
48 static enum command_control_type
49 recurse_read_control_structure (struct command_line *current_cmd);
51 static char *insert_args (char *line);
53 static struct cleanup * setup_user_args (char *p);
55 static void validate_comname (char *);
57 /* Level of control structure. */
58 static int control_level;
60 /* Source command state variable. */
61 static int source_error_allocated;
63 /* Structure for arguments to user defined functions. */
64 #define MAXUSERARGS 10
67 struct user_args *next;
79 /* Allocate, initialize a new command line structure for one of the
80 control commands (if/while). */
82 static struct command_line *
83 build_command_line (enum command_control_type type, char *args)
85 struct command_line *cmd;
88 error ("if/while commands require arguments.\n");
90 cmd = (struct command_line *) xmalloc (sizeof (struct command_line));
92 cmd->control_type = type;
96 = (struct command_line **) xmalloc (sizeof (struct command_line *)
98 memset (cmd->body_list, 0, sizeof (struct command_line *) * cmd->body_count);
99 cmd->line = savestring (args, strlen (args));
103 /* Build and return a new command structure for the control commands
104 such as "if" and "while". */
106 static struct command_line *
107 get_command_line (enum command_control_type type, char *arg)
109 struct command_line *cmd;
110 struct cleanup *old_chain = NULL;
112 /* Allocate and build a new command line structure. */
113 cmd = build_command_line (type, arg);
115 old_chain = make_cleanup_free_command_lines (&cmd);
117 /* Read in the body of this command. */
118 if (recurse_read_control_structure (cmd) == invalid_control)
120 warning ("error reading in control structure\n");
121 do_cleanups (old_chain);
125 discard_cleanups (old_chain);
129 /* Recursively print a command (including full control structures). */
132 print_command_lines (struct ui_out *uiout, struct command_line *cmd,
135 struct command_line *list;
142 ui_out_spaces (uiout, 2 * depth);
144 /* A simple command, print it and continue. */
145 if (list->control_type == simple_control)
147 ui_out_field_string (uiout, NULL, list->line);
148 ui_out_text (uiout, "\n");
153 /* loop_continue to jump to the start of a while loop, print it
155 if (list->control_type == continue_control)
157 ui_out_field_string (uiout, NULL, "loop_continue");
158 ui_out_text (uiout, "\n");
163 /* loop_break to break out of a while loop, print it and continue. */
164 if (list->control_type == break_control)
166 ui_out_field_string (uiout, NULL, "loop_break");
167 ui_out_text (uiout, "\n");
172 /* A while command. Recursively print its subcommands and continue. */
173 if (list->control_type == while_control)
175 ui_out_field_fmt (uiout, NULL, "while %s", list->line);
176 ui_out_text (uiout, "\n");
177 print_command_lines (uiout, *list->body_list, depth + 1);
179 ui_out_spaces (uiout, 2 * depth);
180 ui_out_field_string (uiout, NULL, "end");
181 ui_out_text (uiout, "\n");
186 /* An if command. Recursively print both arms before continueing. */
187 if (list->control_type == if_control)
189 ui_out_field_fmt (uiout, NULL, "if %s", list->line);
190 ui_out_text (uiout, "\n");
192 print_command_lines (uiout, list->body_list[0], depth + 1);
194 /* Show the false arm if it exists. */
195 if (list->body_count == 2)
198 ui_out_spaces (uiout, 2 * depth);
199 ui_out_field_string (uiout, NULL, "else");
200 ui_out_text (uiout, "\n");
201 print_command_lines (uiout, list->body_list[1], depth + 1);
205 ui_out_spaces (uiout, 2 * depth);
206 ui_out_field_string (uiout, NULL, "end");
207 ui_out_text (uiout, "\n");
212 /* ignore illegal command type and try next */
217 /* Handle pre-post hooks. */
220 clear_hook_in_cleanup (void *data)
222 struct cmd_list_element *c = data;
223 c->hook_in = 0; /* Allow hook to work again once it is complete */
227 execute_cmd_pre_hook (struct cmd_list_element *c)
229 if ((c->hook_pre) && (!c->hook_in))
231 struct cleanup *cleanups = make_cleanup (clear_hook_in_cleanup, c);
232 c->hook_in = 1; /* Prevent recursive hooking */
233 execute_user_command (c->hook_pre, (char *) 0);
234 do_cleanups (cleanups);
239 execute_cmd_post_hook (struct cmd_list_element *c)
241 if ((c->hook_post) && (!c->hook_in))
243 struct cleanup *cleanups = make_cleanup (clear_hook_in_cleanup, c);
244 c->hook_in = 1; /* Prevent recursive hooking */
245 execute_user_command (c->hook_post, (char *) 0);
246 do_cleanups (cleanups);
250 /* Execute the command in CMD. */
252 do_restore_user_call_depth (void * call_depth)
254 int * depth = call_depth;
255 /* We will be returning_to_top_level() at this point, so we want to
262 execute_user_command (struct cmd_list_element *c, char *args)
264 register struct command_line *cmdlines;
265 struct cleanup *old_chain;
266 enum command_control_type ret;
267 static int user_call_depth = 0;
268 extern int max_user_call_depth;
270 old_chain = setup_user_args (args);
272 cmdlines = c->user_commands;
277 if (++user_call_depth > max_user_call_depth)
278 error ("Max user call depth exceeded -- command aborted\n");
280 old_chain = make_cleanup (do_restore_user_call_depth, &user_call_depth);
282 /* Set the instream to 0, indicating execution of a
283 user-defined function. */
284 old_chain = make_cleanup (do_restore_instream_cleanup, instream);
285 instream = (FILE *) 0;
288 ret = execute_control_command (cmdlines);
289 if (ret != simple_control && ret != break_control)
291 warning ("Error in control structure.\n");
294 cmdlines = cmdlines->next;
296 do_cleanups (old_chain);
301 enum command_control_type
302 execute_control_command (struct command_line *cmd)
304 struct expression *expr;
305 struct command_line *current;
306 struct cleanup *old_chain = 0;
308 struct value *val_mark;
310 enum command_control_type ret;
313 switch (cmd->control_type)
316 /* A simple command, execute it and return. */
317 new_line = insert_args (cmd->line);
319 return invalid_control;
320 old_chain = make_cleanup (free_current_contents, &new_line);
321 execute_command (new_line, 0);
322 ret = cmd->control_type;
325 case continue_control:
327 /* Return for "continue", and "break" so we can either
328 continue the loop at the top, or break out. */
329 ret = cmd->control_type;
334 /* Parse the loop control expression for the while statement. */
335 new_line = insert_args (cmd->line);
337 return invalid_control;
338 old_chain = make_cleanup (free_current_contents, &new_line);
339 expr = parse_expression (new_line);
340 make_cleanup (free_current_contents, &expr);
342 ret = simple_control;
345 /* Keep iterating so long as the expression is true. */
352 /* Evaluate the expression. */
353 val_mark = value_mark ();
354 val = evaluate_expression (expr);
355 cond_result = value_true (val);
356 value_free_to_mark (val_mark);
358 /* If the value is false, then break out of the loop. */
362 /* Execute the body of the while statement. */
363 current = *cmd->body_list;
366 ret = execute_control_command (current);
368 /* If we got an error, or a "break" command, then stop
370 if (ret == invalid_control || ret == break_control)
376 /* If we got a "continue" command, then restart the loop
378 if (ret == continue_control)
381 /* Get the next statement. */
382 current = current->next;
386 /* Reset RET so that we don't recurse the break all the way down. */
387 if (ret == break_control)
388 ret = simple_control;
395 new_line = insert_args (cmd->line);
397 return invalid_control;
398 old_chain = make_cleanup (free_current_contents, &new_line);
399 /* Parse the conditional for the if statement. */
400 expr = parse_expression (new_line);
401 make_cleanup (free_current_contents, &expr);
404 ret = simple_control;
406 /* Evaluate the conditional. */
407 val_mark = value_mark ();
408 val = evaluate_expression (expr);
410 /* Choose which arm to take commands from based on the value of the
411 conditional expression. */
412 if (value_true (val))
413 current = *cmd->body_list;
414 else if (cmd->body_count == 2)
415 current = *(cmd->body_list + 1);
416 value_free_to_mark (val_mark);
418 /* Execute commands in the given arm. */
421 ret = execute_control_command (current);
423 /* If we got an error, get out. */
424 if (ret != simple_control)
427 /* Get the next statement in the body. */
428 current = current->next;
435 warning ("Invalid control type in command structure.");
436 return invalid_control;
440 do_cleanups (old_chain);
445 /* "while" command support. Executes a body of statements while the
446 loop condition is nonzero. */
449 while_command (char *arg, int from_tty)
451 struct command_line *command = NULL;
454 command = get_command_line (while_control, arg);
459 execute_control_command (command);
460 free_command_lines (&command);
463 /* "if" command support. Execute either the true or false arm depending
464 on the value of the if conditional. */
467 if_command (char *arg, int from_tty)
469 struct command_line *command = NULL;
472 command = get_command_line (if_control, arg);
477 execute_control_command (command);
478 free_command_lines (&command);
483 arg_cleanup (void *ignore)
485 struct user_args *oargs = user_args;
487 internal_error (__FILE__, __LINE__,
488 "arg_cleanup called with no user args.\n");
490 user_args = user_args->next;
494 /* Bind the incomming arguments for a user defined command to
495 $arg0, $arg1 ... $argMAXUSERARGS. */
497 static struct cleanup *
498 setup_user_args (char *p)
500 struct user_args *args;
501 struct cleanup *old_chain;
502 unsigned int arg_count = 0;
504 args = (struct user_args *) xmalloc (sizeof (struct user_args));
505 memset (args, 0, sizeof (struct user_args));
507 args->next = user_args;
510 old_chain = make_cleanup (arg_cleanup, 0/*ignored*/);
522 if (arg_count >= MAXUSERARGS)
524 error ("user defined function may only have %d arguments.\n",
529 /* Strip whitespace. */
530 while (*p == ' ' || *p == '\t')
533 /* P now points to an argument. */
535 user_args->a[arg_count].arg = p;
537 /* Get to the end of this argument. */
540 if (((*p == ' ' || *p == '\t')) && !squote && !dquote && !bsquote)
569 user_args->a[arg_count].len = p - start_arg;
576 /* Given character string P, return a point to the first argument ($arg),
577 or NULL if P contains no arguments. */
582 while ((p = strchr (p, '$')))
584 if (strncmp (p, "$arg", 4) == 0 && isdigit (p[4]))
591 /* Insert the user defined arguments stored in user_arg into the $arg
592 arguments found in line, with the updated copy being placed into nline. */
595 insert_args (char *line)
597 char *p, *save_line, *new_line;
600 /* First we need to know how much memory to allocate for the new line. */
603 while ((p = locate_arg (line)))
608 if (i >= user_args->count)
610 error ("Missing argument %d in user function.\n", i);
613 len += user_args->a[i].len;
617 /* Don't forget the tail. */
618 len += strlen (line);
620 /* Allocate space for the new line and fill it in. */
621 new_line = (char *) xmalloc (len + 1);
622 if (new_line == NULL)
625 /* Restore pointer to beginning of old line. */
628 /* Save pointer to beginning of new line. */
629 save_line = new_line;
631 while ((p = locate_arg (line)))
635 memcpy (new_line, line, p - line);
636 new_line += p - line;
639 len = user_args->a[i].len;
642 memcpy (new_line, user_args->a[i].arg, len);
647 /* Don't forget the tail. */
648 strcpy (new_line, line);
650 /* Return a pointer to the beginning of the new line. */
655 /* Expand the body_list of COMMAND so that it can hold NEW_LENGTH
656 code bodies. This is typically used when we encounter an "else"
657 clause for an "if" command. */
660 realloc_body_list (struct command_line *command, int new_length)
663 struct command_line **body_list;
665 n = command->body_count;
671 body_list = (struct command_line **)
672 xmalloc (sizeof (struct command_line *) * new_length);
674 memcpy (body_list, command->body_list, sizeof (struct command_line *) * n);
676 xfree (command->body_list);
677 command->body_list = body_list;
678 command->body_count = new_length;
681 /* Read one line from the input stream. If the command is an "else" or
682 "end", return such an indication to the caller. */
684 static enum misc_command_type
685 read_next_line (struct command_line **command)
687 char *p, *p1, *prompt_ptr, control_prompt[256];
690 if (control_level >= 254)
691 error ("Control nesting too deep!\n");
693 /* Set a prompt based on the nesting of the control commands. */
694 if (instream == stdin || (instream == 0 && readline_hook != NULL))
696 for (i = 0; i < control_level; i++)
697 control_prompt[i] = ' ';
698 control_prompt[i] = '>';
699 control_prompt[i + 1] = '\0';
700 prompt_ptr = (char *) &control_prompt[0];
705 p = command_line_input (prompt_ptr, instream == stdin, "commands");
707 /* Not sure what to do here. */
711 /* Strip leading and trailing whitespace. */
712 while (*p == ' ' || *p == '\t')
716 while (p1 != p && (p1[-1] == ' ' || p1[-1] == '\t'))
719 /* Blanks and comments don't really do anything, but we need to
720 distinguish them from else, end and other commands which can be
722 if (p1 == p || p[0] == '#')
725 /* Is this the end of a simple, while, or if control structure? */
726 if (p1 - p == 3 && !strncmp (p, "end", 3))
729 /* Is the else clause of an if control structure? */
730 if (p1 - p == 4 && !strncmp (p, "else", 4))
733 /* Check for while, if, break, continue, etc and build a new command
734 line structure for them. */
735 if (p1 - p > 5 && !strncmp (p, "while", 5))
736 *command = build_command_line (while_control, p + 6);
737 else if (p1 - p > 2 && !strncmp (p, "if", 2))
738 *command = build_command_line (if_control, p + 3);
739 else if (p1 - p == 10 && !strncmp (p, "loop_break", 10))
741 *command = (struct command_line *)
742 xmalloc (sizeof (struct command_line));
743 (*command)->next = NULL;
744 (*command)->line = NULL;
745 (*command)->control_type = break_control;
746 (*command)->body_count = 0;
747 (*command)->body_list = NULL;
749 else if (p1 - p == 13 && !strncmp (p, "loop_continue", 13))
751 *command = (struct command_line *)
752 xmalloc (sizeof (struct command_line));
753 (*command)->next = NULL;
754 (*command)->line = NULL;
755 (*command)->control_type = continue_control;
756 (*command)->body_count = 0;
757 (*command)->body_list = NULL;
761 /* A normal command. */
762 *command = (struct command_line *)
763 xmalloc (sizeof (struct command_line));
764 (*command)->next = NULL;
765 (*command)->line = savestring (p, p1 - p);
766 (*command)->control_type = simple_control;
767 (*command)->body_count = 0;
768 (*command)->body_list = NULL;
771 /* Nothing special. */
775 /* Recursively read in the control structures and create a command_line
778 The parent_control parameter is the control structure in which the
779 following commands are nested. */
781 static enum command_control_type
782 recurse_read_control_structure (struct command_line *current_cmd)
785 enum misc_command_type val;
786 enum command_control_type ret;
787 struct command_line **body_ptr, *child_tail, *next;
793 if (current_cmd->control_type == simple_control)
795 error ("Recursed on a simple control type\n");
796 return invalid_control;
799 if (current_body > current_cmd->body_count)
801 error ("Allocated body is smaller than this command type needs\n");
802 return invalid_control;
805 /* Read lines from the input stream and build control structures. */
811 val = read_next_line (&next);
813 /* Just skip blanks and comments. */
814 if (val == nop_command)
817 if (val == end_command)
819 if (current_cmd->control_type == while_control
820 || current_cmd->control_type == if_control)
822 /* Success reading an entire control structure. */
823 ret = simple_control;
828 ret = invalid_control;
833 /* Not the end of a control structure. */
834 if (val == else_command)
836 if (current_cmd->control_type == if_control
837 && current_body == 1)
839 realloc_body_list (current_cmd, 2);
846 ret = invalid_control;
853 child_tail->next = next;
857 body_ptr = current_cmd->body_list;
858 for (i = 1; i < current_body; i++)
867 /* If the latest line is another control structure, then recurse
869 if (next->control_type == while_control
870 || next->control_type == if_control)
873 ret = recurse_read_control_structure (next);
876 if (ret != simple_control)
886 /* Read lines from the input stream and accumulate them in a chain of
887 struct command_line's, which is then returned. For input from a
888 terminal, the special command "end" is used to mark the end of the
889 input, and is not included in the returned chain of commands. */
891 #define END_MESSAGE "End with a line saying just \"end\"."
893 struct command_line *
894 read_command_lines (char *prompt_arg, int from_tty)
896 struct command_line *head, *tail, *next;
897 struct cleanup *old_chain;
898 enum command_control_type ret;
899 enum misc_command_type val;
902 if (readline_begin_hook)
904 /* Note - intentional to merge messages with no newline */
905 (*readline_begin_hook) ("%s %s\n", prompt_arg, END_MESSAGE);
907 else if (from_tty && input_from_terminal_p ())
909 printf_unfiltered ("%s\n%s\n", prompt_arg, END_MESSAGE);
910 gdb_flush (gdb_stdout);
918 val = read_next_line (&next);
920 /* Ignore blank lines or comments. */
921 if (val == nop_command)
924 if (val == end_command)
926 ret = simple_control;
930 if (val != ok_command)
932 ret = invalid_control;
936 if (next->control_type == while_control
937 || next->control_type == if_control)
940 ret = recurse_read_control_structure (next);
943 if (ret == invalid_control)
954 old_chain = make_cleanup_free_command_lines (&head);
963 if (ret != invalid_control)
965 discard_cleanups (old_chain);
968 do_cleanups (old_chain);
971 if (readline_end_hook)
973 (*readline_end_hook) ();
978 /* Free a chain of struct command_line's. */
981 free_command_lines (struct command_line **lptr)
983 register struct command_line *l = *lptr;
984 register struct command_line *next;
985 struct command_line **blist;
990 if (l->body_count > 0)
992 blist = l->body_list;
993 for (i = 0; i < l->body_count; i++, blist++)
994 free_command_lines (blist);
1005 do_free_command_lines_cleanup (void *arg)
1007 free_command_lines (arg);
1010 static struct cleanup *
1011 make_cleanup_free_command_lines (struct command_line **arg)
1013 return make_cleanup (do_free_command_lines_cleanup, arg);
1017 validate_comname (char *comname)
1022 error_no_arg ("name of command to define");
1027 if (!isalnum (*p) && *p != '-' && *p != '_')
1028 error ("Junk in argument list: \"%s\"", p);
1033 /* This is just a placeholder in the command data structures. */
1035 user_defined_command (char *ignore, int from_tty)
1040 define_command (char *comname, int from_tty)
1042 #define MAX_TMPBUF 128
1049 register struct command_line *cmds;
1050 register struct cmd_list_element *c, *newc, *oldc, *hookc = 0;
1051 char *tem = comname;
1053 char tmpbuf[MAX_TMPBUF];
1054 int hook_type = CMD_NO_HOOK;
1055 int hook_name_size = 0;
1057 #define HOOK_STRING "hook-"
1059 #define HOOK_POST_STRING "hookpost-"
1060 #define HOOK_POST_LEN 9
1062 validate_comname (comname);
1064 /* Look it up, and verify that we got an exact match. */
1065 c = lookup_cmd (&tem, cmdlist, "", -1, 1);
1066 if (c && !STREQ (comname, c->name))
1071 if (c->class == class_user || c->class == class_alias)
1072 tem = "Redefine command \"%s\"? ";
1074 tem = "Really redefine built-in command \"%s\"? ";
1075 if (!query (tem, c->name))
1076 error ("Command \"%s\" not redefined.", c->name);
1079 /* If this new command is a hook, then mark the command which it
1080 is hooking. Note that we allow hooking `help' commands, so that
1081 we can hook the `stop' pseudo-command. */
1083 if (!strncmp (comname, HOOK_STRING, HOOK_LEN))
1085 hook_type = CMD_PRE_HOOK;
1086 hook_name_size = HOOK_LEN;
1088 else if (!strncmp (comname, HOOK_POST_STRING, HOOK_POST_LEN))
1090 hook_type = CMD_POST_HOOK;
1091 hook_name_size = HOOK_POST_LEN;
1094 if (hook_type != CMD_NO_HOOK)
1096 /* Look up cmd it hooks, and verify that we got an exact match. */
1097 tem = comname + hook_name_size;
1098 hookc = lookup_cmd (&tem, cmdlist, "", -1, 0);
1099 if (hookc && !STREQ (comname + hook_name_size, hookc->name))
1103 warning ("Your new `%s' command does not hook any existing command.",
1105 if (!query ("Proceed? "))
1106 error ("Not confirmed.");
1110 comname = savestring (comname, strlen (comname));
1112 /* If the rest of the commands will be case insensitive, this one
1113 should behave in the same manner. */
1114 for (tem = comname; *tem; tem++)
1116 *tem = tolower (*tem);
1118 sprintf (tmpbuf, "Type commands for definition of \"%s\".", comname);
1119 cmds = read_command_lines (tmpbuf, from_tty);
1121 if (c && c->class == class_user)
1122 free_command_lines (&c->user_commands);
1124 newc = add_cmd (comname, class_user, user_defined_command,
1125 (c && c->class == class_user)
1126 ? c->doc : savestring ("User-defined.", 13), &cmdlist);
1127 newc->user_commands = cmds;
1129 /* If this new command is a hook, then mark both commands as being
1136 hookc->hook_pre = newc; /* Target gets hooked. */
1137 newc->hookee_pre = hookc; /* We are marked as hooking target cmd. */
1140 hookc->hook_post = newc; /* Target gets hooked. */
1141 newc->hookee_post = hookc; /* We are marked as hooking target cmd. */
1144 /* Should never come here as hookc would be 0. */
1145 internal_error (__FILE__, __LINE__, "bad switch");
1151 document_command (char *comname, int from_tty)
1153 struct command_line *doclines;
1154 register struct cmd_list_element *c;
1155 char *tem = comname;
1158 validate_comname (comname);
1160 c = lookup_cmd (&tem, cmdlist, "", 0, 1);
1162 if (c->class != class_user)
1163 error ("Command \"%s\" is built-in.", comname);
1165 sprintf (tmpbuf, "Type documentation for \"%s\".", comname);
1166 doclines = read_command_lines (tmpbuf, from_tty);
1172 register struct command_line *cl1;
1173 register int len = 0;
1175 for (cl1 = doclines; cl1; cl1 = cl1->next)
1176 len += strlen (cl1->line) + 1;
1178 c->doc = (char *) xmalloc (len + 1);
1181 for (cl1 = doclines; cl1; cl1 = cl1->next)
1183 strcat (c->doc, cl1->line);
1185 strcat (c->doc, "\n");
1189 free_command_lines (&doclines);
1192 struct source_cleanup_lines_args
1196 char *old_pre_error;
1197 char *old_error_pre_print;
1201 source_cleanup_lines (PTR args)
1203 struct source_cleanup_lines_args *p =
1204 (struct source_cleanup_lines_args *) args;
1205 source_line_number = p->old_line;
1206 source_file_name = p->old_file;
1207 source_pre_error = p->old_pre_error;
1208 error_pre_print = p->old_error_pre_print;
1213 do_fclose_cleanup (void *stream)
1218 /* Used to implement source_command */
1221 script_from_file (FILE *stream, char *file)
1223 struct cleanup *old_cleanups;
1224 struct source_cleanup_lines_args old_lines;
1229 internal_error (__FILE__, __LINE__, "called with NULL file pointer!");
1232 old_cleanups = make_cleanup (do_fclose_cleanup, stream);
1234 old_lines.old_line = source_line_number;
1235 old_lines.old_file = source_file_name;
1236 old_lines.old_pre_error = source_pre_error;
1237 old_lines.old_error_pre_print = error_pre_print;
1238 make_cleanup (source_cleanup_lines, &old_lines);
1239 source_line_number = 0;
1240 source_file_name = file;
1241 source_pre_error = error_pre_print == NULL ? "" : error_pre_print;
1242 source_pre_error = savestring (source_pre_error, strlen (source_pre_error));
1243 make_cleanup (xfree, source_pre_error);
1244 /* This will get set every time we read a line. So it won't stay "" for
1246 error_pre_print = "";
1248 needed_length = strlen (source_file_name) + strlen (source_pre_error) + 80;
1249 if (source_error_allocated < needed_length)
1251 source_error_allocated *= 2;
1252 if (source_error_allocated < needed_length)
1253 source_error_allocated = needed_length;
1254 if (source_error == NULL)
1255 source_error = xmalloc (source_error_allocated);
1257 source_error = xrealloc (source_error, source_error_allocated);
1260 read_command_file (stream);
1262 do_cleanups (old_cleanups);
1266 show_user_1 (struct cmd_list_element *c, struct ui_file *stream)
1268 register struct command_line *cmdlines;
1270 cmdlines = c->user_commands;
1273 fputs_filtered ("User command ", stream);
1274 fputs_filtered (c->name, stream);
1275 fputs_filtered (":\n", stream);
1277 print_command_lines (uiout, cmdlines, 1);
1278 fputs_filtered ("\n", stream);