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Diffstat (limited to 'gnu/usr.bin/gdb/main.c')
| -rw-r--r-- | gnu/usr.bin/gdb/main.c | 2241 |
1 files changed, 0 insertions, 2241 deletions
diff --git a/gnu/usr.bin/gdb/main.c b/gnu/usr.bin/gdb/main.c deleted file mode 100644 index 323de87975ad..000000000000 --- a/gnu/usr.bin/gdb/main.c +++ /dev/null @@ -1,2241 +0,0 @@ -/*- - * This code is derived from software copyrighted by the Free Software - * Foundation. - * - * Modified 1991 by Donn Seeley at UUNET Technologies, Inc. - * Modified 1990 by Van Jacobson at Lawrence Berkeley Laboratory. - */ - -#ifndef lint -static char sccsid[] = "@(#)main.c 6.6 (Berkeley) 5/13/91"; -#endif /* not lint */ - -/* Top level for GDB, the GNU debugger. - Copyright (C) 1986, 1987, 1988, 1989 Free Software Foundation, Inc. - -This file is part of GDB. - -GDB is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 1, or (at your option) -any later version. - -GDB is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - -You should have received a copy of the GNU General Public License -along with GDB; see the file COPYING. If not, write to -the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ - -#include <stdio.h> -#include "defs.h" -#include "command.h" -#include "param.h" -#include "expression.h" - -#ifdef USG -#include <sys/types.h> -#include <unistd.h> -#endif - -#include <sys/file.h> -#include <setjmp.h> -#include <signal.h> -#include <sys/param.h> -#include <sys/stat.h> -#include <ctype.h> - -#ifdef SET_STACK_LIMIT_HUGE -#include <sys/time.h> -#include <sys/resource.h> - -int original_stack_limit; -#endif - -/* If this definition isn't overridden by the header files, assume - that isatty and fileno exist on this system. */ -#ifndef ISATTY -#define ISATTY(FP) (isatty (fileno (FP))) -#endif - -extern void free (); - -/* Version number of GDB, as a string. */ - -extern char *version; - -/* - * Declare all cmd_list_element's - */ - -/* Chain containing all defined commands. */ - -struct cmd_list_element *cmdlist; - -/* Chain containing all defined info subcommands. */ - -struct cmd_list_element *infolist; - -/* Chain containing all defined enable subcommands. */ - -struct cmd_list_element *enablelist; - -/* Chain containing all defined disable subcommands. */ - -struct cmd_list_element *disablelist; - -/* Chain containing all defined delete subcommands. */ - -struct cmd_list_element *deletelist; - -/* Chain containing all defined "enable breakpoint" subcommands. */ - -struct cmd_list_element *enablebreaklist; - -/* Chain containing all defined set subcommands */ - -struct cmd_list_element *setlist; - -/* Chain containing all defined \"set history\". */ - -struct cmd_list_element *sethistlist; - -/* Chain containing all defined \"unset history\". */ - -struct cmd_list_element *unsethistlist; - -/* stdio stream that command input is being read from. */ - -FILE *instream; - -/* Current working directory. */ - -char *current_directory; - -/* The directory name is actually stored here (usually). */ -static char dirbuf[MAXPATHLEN]; - -#ifdef KERNELDEBUG -/* Nonzero if we're debugging /dev/mem or a kernel crash dump */ - -int kernel_debugging; -#endif - -/* Nonzero to inhibit confirmation of quitting or restarting - a stopped inferior. */ -int inhibit_confirm; - -/* Nonzero if we can write in text or core file */ - -int writeable_text; - -/* The number of lines on a page, and the number of spaces - in a line. */ -int linesize, pagesize; - -/* Nonzero if we should refrain from using an X window. */ - -int inhibit_windows = 0; - -/* Function to call before reading a command, if nonzero. - The function receives two args: an input stream, - and a prompt string. */ - -void (*window_hook) (); - -extern int frame_file_full_name; -int xgdb_verbose; - -void execute_command(); -void free_command_lines (); -char *gdb_readline (); -char *command_line_input (); -static void initialize_main (); -static void initialize_cmd_lists (); -void command_loop (); -static void source_command (); -static void print_gdb_version (); -static void float_handler (); -static void cd_command (); - -char *getenv (); - -/* gdb prints this when reading a command interactively */ -static char *prompt; - -/* Buffer used for reading command lines, and the size - allocated for it so far. */ - -char *line; -int linesize; - - -/* This is how `error' returns to command level. */ - -jmp_buf to_top_level; - -void -return_to_top_level () -{ - quit_flag = 0; - immediate_quit = 0; - clear_breakpoint_commands (); - clear_momentary_breakpoints (); - disable_current_display (); - do_cleanups (0); - longjmp (to_top_level, 1); -} - -/* Call FUNC with arg ARG, catching any errors. - If there is no error, return the value returned by FUNC. - If there is an error, return zero after printing ERRSTRING - (which is in addition to the specific error message already printed). */ - -int -catch_errors (func, arg, errstring) - int (*func) (); - int arg; - char *errstring; -{ - jmp_buf saved; - int val; - struct cleanup *saved_cleanup_chain; - - saved_cleanup_chain = save_cleanups (); - - bcopy (to_top_level, saved, sizeof (jmp_buf)); - - if (setjmp (to_top_level) == 0) - val = (*func) (arg); - else - { - fprintf (stderr, "%s\n", errstring); - val = 0; - } - - restore_cleanups (saved_cleanup_chain); - - bcopy (saved, to_top_level, sizeof (jmp_buf)); - return val; -} - -/* Handler for SIGHUP. */ - -static void -disconnect () -{ - kill_inferior_fast (); - signal (SIGHUP, SIG_DFL); - kill (getpid (), SIGHUP); -} - -/* Clean up on error during a "source" command (or execution of a - user-defined command). - Close the file opened by the command - and restore the previous input stream. */ - -static void -source_cleanup (stream) - FILE *stream; -{ - /* Instream may be 0; set to it when executing user-defined command. */ - if (instream) - fclose (instream); - instream = stream; -} - -/* - * Source $HOME/.gdbinit and $cwd/.gdbinit. - * If X is enabled, also $HOME/.xgdbinit and $cwd/.xgdbinit.source - */ -void -source_init_files() -{ - char *homedir, initfile[256]; - int samedir = 0; - - /* Read init file, if it exists in home directory */ - homedir = getenv ("HOME"); - if (homedir) { - struct stat homebuf, cwdbuf; - - sprintf(initfile, "%s/.gdbinit", homedir); - if (access (initfile, R_OK) == 0) - if (!setjmp (to_top_level)) - source_command (initfile); - if (!inhibit_windows) { - sprintf(initfile, "%s/.xgdbinit", homedir); - if (access (initfile, R_OK) == 0) - if (!setjmp (to_top_level)) - source_command (initfile); - } - /* Determine if current directory is the same as the home - directory, so we don't source the same file twice. */ - - bzero (&homebuf, sizeof (struct stat)); - bzero (&cwdbuf, sizeof (struct stat)); - - stat(homedir, &homebuf); - stat(".", &cwdbuf); - - samedir = bcmp(&homebuf, &cwdbuf, sizeof(struct stat)) == 0; - } - /* Read the input file in the current directory, *if* it isn't - the same file (it should exist, also). */ - if (!samedir) { - if (access (".gdbinit", R_OK) == 0) - if (!setjmp (to_top_level)) - source_command (".gdbinit"); - if (access (".xgdbinit", R_OK) == 0) - if (!setjmp (to_top_level)) - source_command (".xgdbinit"); - } -} - - -int -main (argc, argv, envp) - int argc; - char **argv; - char **envp; -{ - int count; - int inhibit_gdbinit = 0; - int quiet = 1; - int batch = 0; - register int i; - char *cp; - - /* XXX Windows only for xgdb. */ - char *strrchr(); - if (cp = strrchr(argv[0], '/')) - ++cp; - else - cp = argv[0]; - if (*cp != 'x') - inhibit_windows = 1; - -#if defined (ALIGN_STACK_ON_STARTUP) - i = (int) &count & 0x3; - if (i != 0) - alloca (4 - i); -#endif - - quit_flag = 0; - linesize = 100; - line = (char *) xmalloc (linesize); - *line = 0; - instream = stdin; - - getwd (dirbuf); - current_directory = dirbuf; - -#ifdef SET_STACK_LIMIT_HUGE - { - struct rlimit rlim; - - /* Set the stack limit huge so that alloca (particularly stringtab - * in dbxread.c) does not fail. */ - getrlimit (RLIMIT_STACK, &rlim); - original_stack_limit = rlim.rlim_cur; - rlim.rlim_cur = rlim.rlim_max; - setrlimit (RLIMIT_STACK, &rlim); - } -#endif /* SET_STACK_LIMIT_HUGE */ - - /* Look for flag arguments. */ - - for (i = 1; i < argc; i++) - { - if (!strcmp (argv[i], "-q") || !strcmp (argv[i], "-quiet")) - quiet = 1; - else if (!strcmp (argv[i], "-nx")) - inhibit_gdbinit = 1; - else if (!strcmp (argv[i], "-nw")) - inhibit_windows = 1; - else if (!strcmp (argv[i], "-batch")) - batch = 1, quiet = 1; - else if (!strcmp (argv[i], "-fullname")) - frame_file_full_name = 1; - else if (!strcmp (argv[i], "-xgdb_verbose")) - xgdb_verbose = 1; - /* -help: print a summary of command line switches. */ - else if (!strcmp (argv[i], "-help")) - { - fputs ("\ -This is GDB, the GNU debugger. Use the command\n\ - gdb [options] [executable [core-file]]\n\ -to enter the debugger.\n\ -\n\ -Options available are:\n\ - -help Print this message.\n\ - -quiet Do not print version number on startup.\n\ - -fullname Output information used by emacs-GDB interface.\n\ - -batch Exit after processing options.\n\ - -nx Do not read .gdbinit file.\n\ - -tty TTY Use TTY for input/output by the program being debugged.\n\ - -cd DIR Change current directory to DIR.\n\ - -directory DIR Search for source files in DIR.\n\ - -command FILE Execute GDB commands from FILE.\n\ - -symbols SYMFILE Read symbols from SYMFILE.\n\ - -exec EXECFILE Use EXECFILE as the executable.\n\ - -se FILE Use FILE as symbol file and executable file.\n\ - -core COREFILE Analyze the core dump COREFILE.\n\ - -k Kernel debugging.\n\ - -w Writeable text.\n\ - -v Print GNU message and version number on startup.\n\ - -nc Don't confirm quit or run commands.\n\ -\n\ -For more information, type \"help\" from within GDB, or consult the\n\ -GDB manual (available as on-line info or a printed manual).\n", stderr); - /* Exiting after printing this message seems like - the most useful thing to do. */ - exit (0); - } -#ifdef KERNELDEBUG - else if (!strcmp (argv[i], "-k")) - kernel_debugging = 1; -#endif - else if (!strcmp (argv[i], "-w")) - writeable_text = 1; - else if (!strcmp (argv[i], "-v")) - quiet = 0; - else if (!strcmp (argv[i], "-nc")) - inhibit_confirm = 1; - else if (argv[i][0] == '-') - /* Other options take arguments, so don't confuse an - argument with an option. */ - i++; - } - - /* Run the init function of each source file */ - - initialize_cmd_lists (); /* This needs to be done first */ - initialize_all_files (); - initialize_main (); /* But that omits this file! Do it now */ - initialize_signals (); - - if (!quiet) - print_gdb_version (); - - /* Process the command line arguments. */ - - count = 0; - for (i = 1; i < argc; i++) - { - extern void exec_file_command (), symbol_file_command (); - extern void core_file_command (); - register char *arg = argv[i]; - /* Args starting with - say what to do with the following arg - as a filename. */ - if (arg[0] == '-') - { - extern void tty_command (), directory_command (); - - if (!strcmp (arg, "-q") || !strcmp (arg, "-nx") - || !strcmp (arg, "-quiet") || !strcmp (arg, "-batch") - || !strcmp (arg, "-fullname") || !strcmp (arg, "-nw") - || !strcmp (arg, "-xgdb_verbose") - || !strcmp (arg, "-help") - || !strcmp (arg, "-k") - || !strcmp (arg, "-w") - || !strcmp (arg, "-v") - || !strcmp (arg, "-nc")) - /* Already processed above */ - continue; - - if (++i == argc) - fprintf (stderr, "No argument follows \"%s\".\n", arg); - if (!setjmp (to_top_level)) - { - /* -s foo: get syms from foo. -e foo: execute foo. - -se foo: do both with foo. -c foo: use foo as core dump. */ - if (!strcmp (arg, "-se")) - { - exec_file_command (argv[i], !batch); - symbol_file_command (argv[i], !batch); - } - else if (!strcmp (arg, "-s") || !strcmp (arg, "-symbols")) - symbol_file_command (argv[i], !batch); - else if (!strcmp (arg, "-e") || !strcmp (arg, "-exec")) - exec_file_command (argv[i], !batch); - else if (!strcmp (arg, "-c") || !strcmp (arg, "-core")) - core_file_command (argv[i], !batch); - /* -x foo: execute commands from foo. */ - else if (!strcmp (arg, "-x") || !strcmp (arg, "-command") - || !strcmp (arg, "-commands")) - source_command (argv[i]); - /* -d foo: add directory `foo' to source-file directory - search-list */ - else if (!strcmp (arg, "-d") || !strcmp (arg, "-dir") - || !strcmp (arg, "-directory")) - directory_command (argv[i], 0); - /* -cd FOO: specify current directory as FOO. - GDB remembers the precise string FOO as the dirname. */ - else if (!strcmp (arg, "-cd")) - { - cd_command (argv[i], 0); - init_source_path (); - } - /* -t /def/ttyp1: use /dev/ttyp1 for inferior I/O. */ - else if (!strcmp (arg, "-t") || !strcmp (arg, "-tty")) - tty_command (argv[i], 0); - - else - error ("Unknown command-line switch: \"%s\"\n", arg); - } - } - else - { - /* Args not thus accounted for - are treated as, first, the symbol/executable file - and, second, the core dump file. */ - count++; - if (!setjmp (to_top_level)) - switch (count) - { - case 1: - exec_file_command (arg, !batch); - symbol_file_command (arg, !batch); - break; - - case 2: - core_file_command (arg, !batch); - break; - - case 3: - fprintf (stderr, "Excess command line args ignored. (%s%s)\n", - arg, (i == argc - 1) ? "" : " ..."); - } - } - } - - if (!inhibit_gdbinit) - source_init_files(); - - if (batch) - { -#if 0 - fatal ("Attempt to read commands from stdin in batch mode."); -#endif - /* We have hit the end of the batch file. */ - exit (0); - } - - if (!quiet) - printf ("Type \"help\" for a list of commands.\n"); - - /* The command loop. */ - - while (1) - { - if (!setjmp (to_top_level)) - command_loop (); - if (ISATTY(stdin)) - clearerr (stdin); /* Don't get hung if C-d is typed. */ - else if (feof(instream)) /* Avoid endless loops for redirected stdin */ - break; - } - exit (0); -} - - -static void -do_nothing () -{ -} - -/* Read commands from `instream' and execute them - until end of file. */ -void -command_loop () -{ - struct cleanup *old_chain; - register int toplevel = (instream == stdin); - register int interactive = (toplevel && ISATTY(stdin)); - - while (!feof (instream)) - { - register char *cmd_line; - - quit_flag = 0; - if (interactive) - reinitialize_more_filter (); - old_chain = make_cleanup (do_nothing, 0); - cmd_line = command_line_input (prompt, toplevel); - execute_command (cmd_line, toplevel); - /* Do any commands attached to breakpoint we stopped at. */ - do_breakpoint_commands (); - do_cleanups (old_chain); - } -} - -/* Commands call this if they do not want to be repeated by null lines. */ - -void -dont_repeat () -{ - /* If we aren't reading from standard input, we are saving the last - thing read from stdin in line and don't want to delete it. Null lines - won't repeat here in any case. */ - if (instream == stdin) - *line = 0; -} - -/* Read a line from the stream "instream" without command line editing. - - It prints PROMPT once at the start. - Action is compatible with "readline" (i.e., space for typing is - malloced & should be freed by caller). */ -char * -gdb_readline (prompt) - char *prompt; -{ - int c; - char *result; - int input_index = 0; - int result_size = 80; - - if (prompt) - { - printf (prompt); - fflush (stdout); - } - - result = (char *) xmalloc (result_size); - - while (1) - { - c = fgetc (instream ? instream : stdin); - if (c == EOF) - { - free(result); - return ((char *)0); - } - if (c == '\n') - break; - - result[input_index++] = c; - if (input_index >= result_size) - { - result_size <= 1; - result = (char *)xrealloc(result, result_size); - } - } - result[input_index++] = '\0'; - return result; -} - -/* Declaration for fancy readline with command line editing. */ -char *readline (); - -/* Variables which control command line editing and history - substitution. These variables are given default values at the end - of this file. */ -static int command_editing_p; -static int history_expansion_p; -static int write_history_p; -static int history_size; -static char *history_filename; - -/* Variables which are necessary for fancy command line editing. */ -char *gdb_completer_word_break_characters = - " \t\n!@#$%^&*()-+=|~`}{[]\"';:?/>.<,"; - -/* Functions that are used as part of the fancy command line editing. */ - -/* Generate symbol names one by one for the completer. If STATE is - zero, then we need to initialize, otherwise the initialization has - already taken place. TEXT is what we expect the symbol to start - with. RL_LINE_BUFFER is available to be looked at; it contains the - entire text of the line. RL_POINT is the offset in that line of - the cursor. You should pretend that the line ends at RL_POINT. */ -char * -symbol_completion_function (text, state) - char *text; - int state; -{ - char **make_symbol_completion_list (); - static char **list = (char **)NULL; - static int index; - char *output; - extern char *rl_line_buffer; - extern int rl_point; - char *tmp_command, *p; - struct cmd_list_element *c, *result_list; - - if (!state) - { - /* Free the storage used by LIST, but not by the strings inside. This is - because rl_complete_internal () frees the strings. */ - if (list) - free (list); - list = 0; - index = 0; - - /* Decide whether to complete on a list of gdb commands or on - symbols. */ - tmp_command = (char *) alloca (rl_point + 1); - p = tmp_command; - - strncpy (tmp_command, rl_line_buffer, rl_point); - tmp_command[rl_point] = '\0'; - - if (rl_point == 0) - { - /* An empty line we want to consider ambiguous; that is, - it could be any command. */ - c = (struct cmd_list_element *) -1; - result_list = 0; - } - else - c = lookup_cmd_1 (&p, cmdlist, &result_list, 1); - - /* Move p up to the next interesting thing. */ - while (*p == ' ' || *p == '\t') - p++; - - if (!c) - /* He's typed something unrecognizable. Sigh. */ - list = (char **) 0; - else if (c == (struct cmd_list_element *) -1) - { - if (p + strlen(text) != tmp_command + rl_point) - error ("Unrecognized command."); - - /* He's typed something ambiguous. This is easier. */ - if (result_list) - list = complete_on_cmdlist (*result_list->prefixlist, text); - else - list = complete_on_cmdlist (cmdlist, text); - } - else - { - /* If we've gotten this far, gdb has recognized a full - command. There are several possibilities: - - 1) We need to complete on the command. - 2) We need to complete on the possibilities coming after - the command. - 2) We need to complete the text of what comes after the - command. */ - - if (!*p && *text) - /* Always (might be longer versions of thie command). */ - list = complete_on_cmdlist (result_list, text); - else if (!*p && !*text) - { - if (c->prefixlist) - list = complete_on_cmdlist (*c->prefixlist, ""); - else - list = make_symbol_completion_list (""); - } - else - { - if (c->prefixlist && !c->allow_unknown) - { - *p = '\0'; - error ("\"%s\" command requires a subcommand.", - tmp_command); - } - else - list = make_symbol_completion_list (text); - } - } - } - - /* If the debugged program wasn't compiled with symbols, or if we're - clearly completing on a command and no command matches, return - NULL. */ - if (!list) - return ((char *)NULL); - - output = list[index]; - if (output) - index++; - - return (output); -} - - -void -print_prompt () -{ - if (prompt) - { - printf ("%s", prompt); - fflush (stdout); - } -} - - -#ifdef HAVE_TERMIO -#include <termio.h> -static struct termio norm_tty; - -static void -suspend_sig() -{ - int tty = fileno(stdin); - struct termio cur_tty; - - ioctl(tty, TCGETA, &cur_tty); - ioctl(tty, TCSETAW, &norm_tty); - - (void) sigsetmask(0); - signal(SIGTSTP, SIG_DFL); - kill(0, SIGTSTP); - - /* - * we've just been resumed -- current tty params become new - * 'normal' params (in case tset/stty was done while we were - * suspended). Merge values that readline might have changed - * into new params, then restore term mode. - */ - ioctl(tty, TCGETA, &norm_tty); - cur_tty.c_lflag = (cur_tty.c_lflag & (ICANON|ECHO|ISIG)) | - (norm_tty.c_lflag &~ (ICANON|ECHO|ISIG)); - cur_tty.c_iflag = (cur_tty.c_iflag & (IXON|ISTRIP|INPCK)) | - (norm_tty.c_iflag &~ (IXON|ISTRIP|INPCK)); - ioctl(tty, TCSETAW, &cur_tty); - - signal(SIGTSTP, suspend_sig); - print_prompt(); - - /* - * Forget about any previous command -- null line now will do - * nothing. - */ - dont_repeat(); -} - -#else - -#include <sys/ioctl.h> -#include <fcntl.h> -#include <sgtty.h> - -static struct sgttyb norm_tty; -static struct tchars norm_tchars; -static struct ltchars norm_ltchars; -static int norm_lflags; - -#ifdef PASS8 -#define RL_TFLAGS (RAW|CRMOD|ECHO|CBREAK|PASS8) -#else -#define RL_TFLAGS (RAW|CRMOD|ECHO|CBREAK) -#endif - -static void -suspend_sig() -{ - int tty = fileno(stdin); - struct sgttyb cur_tty; - struct tchars cur_tchars; - struct ltchars cur_ltchars; - int cur_lflags; - int cur_flags; - - ioctl(tty, TIOCGETP, &cur_tty); - ioctl(tty, TIOCGETC, &cur_tchars); - ioctl(tty, TIOCLGET, &cur_lflags); - ioctl(tty, TIOCGLTC, &cur_ltchars); - - ioctl(tty, TIOCSETP, &norm_tty); - ioctl(tty, TIOCSETC, &norm_tchars); - ioctl(tty, TIOCLSET, &norm_lflags); - ioctl(tty, TIOCSLTC, &norm_ltchars); - - (void) sigsetmask(0); - signal(SIGTSTP, SIG_DFL); - kill(0, SIGTSTP); - - /* - * we've just been resumed -- current tty params become new - * 'normal' params (in case tset/stty was done while we were - * suspended). Merge values that readline might have changed - * into new params, then restore term mode. - */ - ioctl(tty, TIOCGETP, &norm_tty); - cur_flags = cur_tty.sg_flags; - cur_tty = norm_tty; - cur_tty.sg_flags = (cur_tty.sg_flags &~ RL_TFLAGS) - | (cur_flags & RL_TFLAGS); - - ioctl(tty, TIOCLGET, &norm_lflags); -#ifdef LPASS8 - cur_lflags = (cur_lflags &~ LPASS8) | (cur_flags & LPASS8); -#endif - ioctl(tty, TIOCGETC, &norm_tchars); - ioctl(tty, TIOCGLTC, &norm_ltchars); - - ioctl(tty, TIOCSETP, &cur_tty); - ioctl(tty, TIOCSETC, &cur_tchars); - ioctl(tty, TIOCLSET, &cur_lflags); - ioctl(tty, TIOCSLTC, &cur_ltchars); - - signal(SIGTSTP, suspend_sig); - print_prompt(); - - /* - * Forget about any previous command -- null line now will do - * nothing. - */ - dont_repeat(); -} -#endif /* HAVE_TERMIO */ - -/* Initialize signal handlers. */ -initialize_signals () -{ - extern void request_quit (); - int tty = fileno(stdin); - - signal (SIGINT, request_quit); - - /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get - passed to the inferior, which we don't want. It would be - possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but - on BSD4.3 systems using vfork, that will (apparently) affect the - GDB process as well as the inferior (the signal handling tables - being shared between the two, apparently). Since we establish - a handler for SIGQUIT, when we call exec it will set the signal - to SIG_DFL for us. */ - signal (SIGQUIT, do_nothing); - if (signal (SIGHUP, do_nothing) != SIG_IGN) - signal (SIGHUP, disconnect); - signal (SIGFPE, float_handler); - - ioctl(tty, TIOCGETP, &norm_tty); - ioctl(tty, TIOCLGET, &norm_lflags); - ioctl(tty, TIOCGETC, &norm_tchars); - ioctl(tty, TIOCGLTC, &norm_ltchars); - signal(SIGTSTP, suspend_sig); -} - -char * -finish_command_input(inputline, repeat, interactive) - register char *inputline; - int repeat; - int interactive; -{ - static char *do_free; - - if (do_free) { - free(do_free); - do_free = NULL; - } - - /* Do history expansion if that is wished. */ - if (interactive && history_expansion_p) { - int expanded; - - expanded = history_expand(inputline, &do_free); - if (expanded) { - /* Print the changes. */ - puts(do_free); - - /* An error acts like no input. */ - if (expanded < 0) { - *do_free = 0; - return (do_free); - } - } - inputline = do_free; - } - /* get rid of any leading whitespace */ - while (isspace(*inputline)) - ++inputline; - /* - * If we just got an empty line, and that is supposed to repeat the - * previous command, return the value in the global buffer. - */ - if (*inputline == 0) { - if (repeat) - return (line); - } else if (interactive) - add_history(inputline); - - /* - * If line is a comment, clear it out. - * Note: comments are added to the command history. This is useful - * when you type a command, and then realize you don't want to - * execute it quite yet. You can comment out the command and then - * later fetch it from the value history and remove the '#'. - */ - if (*inputline == '#') - *inputline = 0; - else if (repeat) { - /* Save into global buffer. */ - register int i = strlen(inputline) + 1; - - if (i > linesize) { - line = xrealloc(line, i); - linesize = i; - } - strcpy(line, inputline); - } - return (inputline); -} - -static char * -get_a_cmd_line(prompt, interactive) - char *prompt; - int interactive; -{ - register char *cp; - - /* Control-C quits instantly if typed while reading input. */ - immediate_quit++; - if (interactive && command_editing_p) { - extern void (*rl_event_hook)(); - - rl_event_hook = window_hook; - cp = readline(prompt); - } else { - if (interactive) { - if (window_hook) { - print_prompt(); - (*window_hook)(); - } - } else - prompt = NULL; - cp = gdb_readline(prompt); - } - --immediate_quit; - return (cp); -} - -/* Read one line from the command input stream `instream' - Returns the address of the start of the line. - - *If* the instream == stdin & stdin is a terminal, the line read - is copied into the file line saver (global var char *line, - length linesize) so that it can be duplicated. - - This routine either uses fancy command line editing or - simple input as the user has requested. */ - -char * -command_line_input(prompt, repeat) - char *prompt; - int repeat; -{ - static char *do_free; - register int interactive = (instream == stdin && ISATTY(instream)); - register char *cp; - register int i; - - if (do_free) { - free(do_free); - do_free = NULL; - } - cp = get_a_cmd_line(prompt, interactive); - - /* - * handle continued lines (this loop is not particularly - * efficient because it's rare). - */ - while (cp && cp[i = strlen(cp) - 1] == '\\') { - register char *np = get_a_cmd_line(prompt, interactive); - register int j; - - if (np == NULL) { - cp[i] = 0; - break; - } - j = strlen(np); - cp = xrealloc(cp, i + j + 1); - strcpy(cp + i, np); - free(np); - } - if (cp == NULL) - return (""); - do_free = cp; - return (finish_command_input(cp, repeat, interactive)); -} - - -#define MAX_USER_ARGS 32 - -static struct user_args { - struct { - char *arg; - int len; - } a[10]; -} uargs[MAX_USER_ARGS]; - -static struct user_args *user_arg = uargs; - -static void -arg_cleanup(ap) - struct user_args *ap; -{ - user_arg = ap; -} - -/* Bind arguments $arg0, $arg1, ..., for a user defined command. */ -struct cleanup * -setup_user_args(p) - char *p; -{ - register int i; - struct cleanup *old_chain = make_cleanup(arg_cleanup, user_arg); - - if (++user_arg >= &uargs[MAX_USER_ARGS]) - error("user defined functions nested too deeply\n"); - - bzero(user_arg, sizeof(*user_arg)); - - i = 0; - while (*p) { - while (isspace(*p)) - ++p; - user_arg->a[i].arg = p; - while (*p && ! isspace(*p)) - ++p; - user_arg->a[i].len = p - user_arg->a[i].arg; - ++i; - } - return (old_chain); -} - -static char * -findarg(str) - register char *str; -{ - register char *cp = str; - extern char *index(); - - while (cp = index(cp, '$')) { - if (strncmp(cp, "$arg", 4) == 0 && isdigit(cp[4])) - return (cp); - ++cp; - } - return (char *)0; -} - -/* expand arguments from "line" into "new" */ -static void -expand_args(line, new) - register char *line, *new; -{ - register char *cp = findarg(line); - - while (cp = findarg(line)) { - int i, len; - - bcopy(line, new, cp - line); - new += cp - line; - i = cp[4] - '0'; - if (len = user_arg->a[i].len) { - bcopy(user_arg->a[i].arg, new, len); - new += len; - } - line = cp + 5; - } - strcpy(new, line); -} - -/* expand any arguments in "line" then execute the result */ -static void -expand_and_execute(line, from_tty) - char *line; - int from_tty; -{ - void execute_command(); - char new[1024]; - - if (! findarg(line)) { - execute_command(line, from_tty); - return; - } - expand_args(line, new); - execute_command(new, from_tty); -} - -char * -read_one_command_line(prompt, from_tty) - char *prompt; -{ - register char *p, *p1; - - dont_repeat(); - p = command_line_input(prompt, from_tty); - - /* Remove trailing blanks. */ - p1 = p + strlen(p); - while (--p1 > p && (*p1 == ' ' || *p1 == '\t')) - ; - *++p1 = 0; - return (p); -} - -static char cmd_prompt[] = " > "; - -int -parse_control_structure(rootcmd, from_tty, level) - struct command_line *rootcmd; - int from_tty; -{ - struct command_line *cmd = (struct command_line *)xmalloc(sizeof(*cmd)); - char *prompt; - - ++level; - prompt = from_tty? &cmd_prompt[sizeof(cmd_prompt) - 1 - 2*level] : - (char *)0; - bzero(cmd, sizeof(*cmd)); - rootcmd->body = cmd; - while (1) { - char *p = read_one_command_line(prompt, from_tty); - - p = savestring(p, strlen(p)); - cmd->line = p; - if (!strncmp(p, "while ", 6)) { - cmd->type = CL_WHILE; - if (parse_control_structure(cmd, from_tty, level)) - return (1); - } else if (!strncmp(p, "if ", 3)) { - cmd->type = CL_IF; - if (parse_control_structure(cmd, from_tty, level)) { - struct command_line *tmp; - int stat; - - cmd->elsebody = cmd->body; - stat = parse_control_structure(cmd, from_tty, - level); - tmp = cmd->elsebody; - cmd->elsebody = cmd->body; - cmd->body = tmp; - if (stat) - return (1); - } - } else if (!strcmp(p, "else")) { - cmd->type = CL_END; - return (1); - } else if (!strcmp(p, "end")) { - cmd->type = CL_END; - return (0); - } else if (!strcmp(p, "exitloop")) { - cmd->type = CL_EXITLOOP; - } else { - cmd->type = CL_NORMAL; - } - cmd->next = (struct command_line *)xmalloc(sizeof(*cmd)); - cmd = cmd->next; - bzero(cmd, sizeof(*cmd)); - } - /* NOTREACHED */ -} - -int -execute_control_structure(cmd) - register struct command_line *cmd; -{ - char expn[1024]; - struct expression *cond; - int stat; - - while (cmd) { - QUIT; - switch (cmd->type) { - case CL_END: - return (0); - case CL_NORMAL: - expand_and_execute(cmd->line, 0); - break; - case CL_WHILE: - expand_args(cmd->line + 6, expn); - cond = parse_c_expression(expn); - while (breakpoint_cond_eval(cond) == 0) - if (execute_control_structure(cmd->body)) - break; - free(cond); - break; - case CL_IF: - expand_args(cmd->line + 3, expn); - cond = parse_c_expression(expn); - stat = breakpoint_cond_eval(cond); - free(cond); - if (stat == 0) { - if (execute_control_structure(cmd->body)) - return (1); - } else if (cmd->elsebody) { - if (execute_control_structure(cmd->elsebody)) - return (1); - } - break; - case CL_EXITLOOP: - return (1); - } - cmd = cmd->next; - } - free_all_values(); -} - -execute_command_lines(cmd) - struct command_line *cmd; -{ - struct cleanup *old_chain = make_cleanup(source_cleanup, instream); - - /* - * Set the instream to 0, indicating execution of a user-defined - * function. - */ - ++immediate_quit; - instream = (FILE *) 0; - (void)execute_control_structure(cmd); - --immediate_quit; - do_cleanups(old_chain); -} - -/* do following command lines if expression true */ -if_command(p, from_tty) - char *p; - int from_tty; -{ - struct cleanup *old_chain; - struct command_line *cmd = (struct command_line *)xmalloc(sizeof(*cmd)); - char buf[128]; - - sprintf(buf, "if %s", p); - - bzero(cmd, sizeof(*cmd)); - old_chain = make_cleanup(free_command_lines, cmd); - cmd->type = CL_IF; - cmd->line = savestring(buf, strlen(buf)); - /* XXX cmd->line? */ - if (parse_control_structure(cmd, from_tty, 0)) { - struct command_line *tmp; - - cmd->elsebody = cmd->body; - (void) parse_control_structure(cmd, from_tty, 0); - tmp = cmd->elsebody; - cmd->elsebody = cmd->body; - cmd->body = tmp; - } - (void) execute_command_lines(cmd); - do_cleanups(old_chain); -} - -/* do following command lines while expression true */ -while_command(p, from_tty) - char *p; - int from_tty; -{ - struct cleanup *old_chain; - struct command_line *cmd = (struct command_line *)xmalloc(sizeof(*cmd)); - char buf[128]; - - sprintf(buf, "while %s", p); - - bzero(cmd, sizeof(*cmd)); - old_chain = make_cleanup(free_command_lines, cmd); - cmd->type = CL_WHILE; - cmd->line = savestring(buf, strlen(buf)); - (void)parse_control_structure(cmd, from_tty, 0); - (void)execute_command_lines(cmd); - do_cleanups(old_chain); -} - -/* - * Execute the line P as a command. - * Pass FROM_TTY as second argument to the defining function. - */ -void -execute_command (p, from_tty) - char *p; - int from_tty; -{ - register struct cmd_list_element *c; - register struct command_line *cmdlines; - - free_all_values(); - if (*p) { - c = lookup_cmd(&p, cmdlist, "", 0, 1); - if (c->function == 0) - error("That is not a command, just a help topic."); - else if (c->class == (int) class_user) { - struct cleanup *old_chain = setup_user_args(p); - - cmdlines = (struct command_line *) c->function; - if (cmdlines) - (void)execute_command_lines(cmdlines); - - do_cleanups(old_chain); - } else - /* Pass null arg rather than an empty one. */ - (*c->function) (*p ? p : 0, from_tty); - } -} - -/* - * Read lines from the input stream and accumulate them in a chain of struct - * command_line's which is then returned. - */ -struct command_line * -read_command_lines(from_tty) - int from_tty; -{ - struct cleanup *old_chain; - struct command_line *cmd = (struct command_line *)xmalloc(sizeof(*cmd)); - struct command_line *next; - - bzero(cmd, sizeof(*cmd)); - old_chain = make_cleanup(free_command_lines, cmd); - cmd->type = CL_NOP; - (void)parse_control_structure(cmd, from_tty, 0); - dont_repeat(); - discard_cleanups(old_chain); - next = cmd->body; - free(cmd); - return (next); -} - -/* Free a chain of struct command_line's. */ - -void -free_command_lines(cmds) - struct command_line *cmds; -{ - struct command_line *next; - - while (cmds) { - if (cmds->body) - free(cmds->body); - if (cmds->elsebody) - free(cmds->elsebody); - if (cmds->line) - free(cmds->line); - next = cmds->next; - free(cmds); - cmds = next; - } -} - -/* Add an element to the list of info subcommands. */ - -void -add_info (name, fun, doc) - char *name; - void (*fun) (); - char *doc; -{ - add_cmd (name, no_class, fun, doc, &infolist); -} - -/* Add an alias to the list of info subcommands. */ - -void -add_info_alias (name, oldname, abbrev_flag) - char *name; - char *oldname; - int abbrev_flag; -{ - add_alias_cmd (name, oldname, 0, abbrev_flag, &infolist); -} - -/* The "info" command is defined as a prefix, with allow_unknown = 0. - Therefore, its own definition is called only for "info" with no args. */ - -static void -info_command () -{ - printf ("\"info\" must be followed by the name of an info command.\n"); - help_list (infolist, "info ", -1, stdout); -} - -/* Add an element to the list of commands. */ - -void -add_com (name, class, fun, doc) - char *name; - int class; - void (*fun) (); - char *doc; -{ - add_cmd (name, class, fun, doc, &cmdlist); -} - -/* Add an alias or abbreviation command to the list of commands. */ - -void -add_com_alias (name, oldname, class, abbrev_flag) - char *name; - char *oldname; - int class; - int abbrev_flag; -{ - add_alias_cmd (name, oldname, class, abbrev_flag, &cmdlist); -} - -void -error_no_arg (why) - char *why; -{ - error ("Argument required (%s).", why); -} - -static void -help_command (command, from_tty) - char *command; - int from_tty; /* Ignored */ -{ - help_cmd (command, stdout); -} - -static void -validate_comname (comname) - char *comname; -{ - register char *p; - - if (comname == 0) - error_no_arg ("name of command to define"); - - p = comname; - while (*p) - { - if (!(*p >= 'A' && *p <= 'Z') - && !(*p >= 'a' && *p <= 'z') - && !(*p >= '0' && *p <= '9') - && *p != '-') - error ("Junk in argument list: \"%s\"", p); - p++; - } -} - -static void -define_command (comname, from_tty) - char *comname; - int from_tty; -{ - register struct command_line *cmds; - register struct cmd_list_element *c; - char *tem = comname; - - validate_comname (comname); - - c = lookup_cmd (&tem, cmdlist, "", -1, 1); - if (c) - { - if (c->class == (int) class_user || c->class == (int) class_alias) - tem = "Redefine command \"%s\"? "; - else - tem = "Really redefine built-in command \"%s\"? "; - if (!query (tem, comname)) - error ("Command \"%s\" not redefined.", comname); - } - - if (from_tty) - { - printf ("Type commands for definition of \"%s\".\n\ -End with a line saying just \"end\".\n", comname); - fflush (stdout); - } - comname = savestring (comname, strlen (comname)); - - cmds = read_command_lines (from_tty); - - if (c && c->class == (int) class_user) - free_command_lines (c->function); - - add_com (comname, class_user, cmds, - (c && c->class == (int) class_user) - ? c->doc : savestring ("User-defined.", 13)); -} - -static void -document_command (comname, from_tty) - char *comname; - int from_tty; -{ - register struct cmd_list_element *c; - register char *p; - register char *cp; - register char *doc = 0; - register int len; - char *tmp = comname; - - validate_comname (comname); - c = lookup_cmd (&tmp, cmdlist, "", 0, 1); - if (c->class != (int) class_user) - error ("Command \"%s\" is built-in.", comname); - - if (from_tty) - printf ("Type documentation for \"%s\". \ -End with a line saying just \"end\".\n", comname); - - while (p = read_one_command_line(from_tty? "> " : 0, from_tty)) - { - if (strcmp(p, "end") == 0) - break; - len = strlen(p) + 1; - if (! doc) - { - doc = xmalloc(len); - cp = doc; - } - else - { - int i = cp - doc; - doc = xrealloc(doc, i + len); - cp = doc + i; - } - strcpy(cp, p); - cp += len; - cp[-1] = '\n'; - } - if (doc && cp > doc) - cp[-1] = 0; - if (c->doc) - free (c->doc); - c->doc = doc; -} - -static void -print_gdb_version () -{ - printf ("GDB %s, Copyright (C) 1989 Free Software Foundation, Inc.\n\ -There is ABSOLUTELY NO WARRANTY for GDB; type \"info warranty\" for details.\n\ -GDB is free software and you are welcome to distribute copies of it\n\ - under certain conditions; type \"info copying\" to see the conditions.\n", - version); -} - -static void -version_info () -{ - immediate_quit++; - print_gdb_version (); - immediate_quit--; -} - - -/* Command to specify a prompt string instead of "(gdb) ". */ - -void -set_prompt_command (text) - char *text; -{ - char *p, *q; - register int c; - char *new; - - if (text == 0) - error_no_arg ("string to which to set prompt"); - - new = (char *) xmalloc (strlen (text) + 2); - p = text; q = new; - while (c = *p++) - { - if (c == '\\') - { - /* \ at end of argument is used after spaces - so they won't be lost. */ - if (*p == 0) - break; - c = parse_escape (&p); - if (c == 0) - break; /* C loses */ - else if (c > 0) - *q++ = c; - } - else - *q++ = c; - } - if (*(p - 1) != '\\') - *q++ = ' '; - *q++ = '\0'; - new = (char *) xrealloc (new, q - new); - free (prompt); - prompt = new; -} - -static void -quit_command () -{ - extern void exec_file_command (); - if (have_inferior_p ()) - { - if (inhibit_confirm || query ("The program is running. Quit anyway? ")) - { - /* Prevent any warning message from reopen_exec_file, in case - we have a core file that's inconsistent with the exec file. */ - exec_file_command (0, 0); - kill_inferior (); - } - else - error ("Not confirmed."); - } - /* Save the history information if it is appropriate to do so. */ - if (write_history_p && history_filename) - write_history (history_filename); - exit (0); -} - -int -input_from_terminal_p () -{ - return instream == stdin; -} - -static void -pwd_command (arg, from_tty) - char *arg; - int from_tty; -{ - if (arg) error ("The \"pwd\" command does not take an argument: %s", arg); - getwd (dirbuf); - - if (strcmp (dirbuf, current_directory)) - printf ("Working directory %s\n (canonically %s).\n", - current_directory, dirbuf); - else - printf ("Working directory %s.\n", current_directory); -} - -static void -cd_command (dir, from_tty) - char *dir; - int from_tty; -{ - int len; - int change; - - if (dir == 0) - error_no_arg ("new working directory"); - - dir = tilde_expand (dir); - make_cleanup (free, dir); - - len = strlen (dir); - dir = savestring (dir, len - (len > 1 && dir[len-1] == '/')); - if (dir[0] == '/') - current_directory = dir; - else - { - current_directory = concat (current_directory, "/", dir); - free (dir); - } - - /* Now simplify any occurrences of `.' and `..' in the pathname. */ - - change = 1; - while (change) - { - char *p; - change = 0; - - for (p = current_directory; *p;) - { - if (!strncmp (p, "/./", 2) - && (p[2] == 0 || p[2] == '/')) - strcpy (p, p + 2); - else if (!strncmp (p, "/..", 3) - && (p[3] == 0 || p[3] == '/') - && p != current_directory) - { - char *q = p; - while (q != current_directory && q[-1] != '/') q--; - if (q != current_directory) - { - strcpy (q-1, p+3); - p = q-1; - } - } - else p++; - } - } - - if (chdir (dir) < 0) - perror_with_name (dir); - - if (from_tty) - pwd_command ((char *) 0, 1); -} - -static void -source_command (arg, from_tty) - char *arg; - int from_tty; -{ - FILE *stream; - struct cleanup *cleanups; - char *file = arg; - char *path; - - if (file == 0) - /* Let source without arguments read .gdbinit. */ - file = ".gdbinit"; - - file = tilde_expand (file); - make_cleanup (free, file); - -#ifdef KERNELDEBUG - if (path = getenv(kernel_debugging? "KGDBPATH" : "GDBPATH")) -#else - if (path = getenv("GDBPATH")) -#endif - { - int fd = openp(path, 1, file, O_RDONLY, 0, 0); - - if (fd == -1) - stream = 0; - else - stream = fdopen(fd, "r"); - } - else - stream = fopen (file, "r"); - - if (stream == 0) - perror_with_name (file); - - cleanups = make_cleanup (source_cleanup, instream); - - instream = stream; - - command_loop (); - - do_cleanups (cleanups); -} - -static void -echo_command (text) - char *text; -{ - char *p = text; - register int c; - - if (text) - while (c = *p++) - { - if (c == '\\') - { - /* \ at end of argument is used after spaces - so they won't be lost. */ - if (*p == 0) - return; - - c = parse_escape (&p); - if (c >= 0) - fputc (c, stdout); - } - else - fputc (c, stdout); - } - fflush(stdout); -} - -static void -dump_me_command () -{ - if (query ("Should GDB dump core? ")) - { - signal (SIGQUIT, SIG_DFL); - kill (getpid (), SIGQUIT); - } -} - -int -parse_binary_operation (caller, arg) - char *caller, *arg; -{ - int length; - - if (!arg || !*arg) - return 1; - - length = strlen (arg); - - while (arg[length - 1] == ' ' || arg[length - 1] == '\t') - length--; - - if (!strncmp (arg, "on", length) - || !strncmp (arg, "1", length) - || !strncmp (arg, "yes", length)) - return 1; - else - if (!strncmp (arg, "off", length) - || !strncmp (arg, "0", length) - || !strncmp (arg, "no", length)) - return 0; - else - error ("\"%s\" not given a binary valued argument.", caller); -} - -/* Functions to manipulate command line editing control variables. */ - -static void -set_editing (arg, from_tty) - char *arg; - int from_tty; -{ - command_editing_p = parse_binary_operation ("set command-editing", arg); -} - -/* Number of commands to print in each call to editing_info. */ -#define Hist_print 10 -static void -editing_info (arg, from_tty) - char *arg; - int from_tty; -{ - /* Index for history commands. Relative to history_base. */ - int offset; - - /* Number of the history entry which we are planning to display next. - Relative to history_base. */ - static int num = 0; - - /* The first command in the history which doesn't exist (i.e. one more - than the number of the last command). Relative to history_base. */ - int hist_len; - - struct _hist_entry { - char *line; - char *data; - } *history_get(); - extern int history_base; - - printf_filtered ("Interactive command editing is %s.\n", - command_editing_p ? "on" : "off"); - - printf_filtered ("History expansion of command input is %s.\n", - history_expansion_p ? "on" : "off"); - printf_filtered ("Writing of a history record upon exit is %s.\n", - write_history_p ? "enabled" : "disabled"); - printf_filtered ("The size of the history list (number of stored commands) is %d.\n", - history_size); - printf_filtered ("The name of the history record is \"%s\".\n\n", - history_filename ? history_filename : ""); - - /* Print out some of the commands from the command history. */ - /* First determine the length of the history list. */ - hist_len = history_size; - for (offset = 0; offset < history_size; offset++) - { - if (!history_get (history_base + offset)) - { - hist_len = offset; - break; - } - } - - if (arg) - { - if (arg[0] == '+' && arg[1] == '\0') - /* "info editing +" should print from the stored position. */ - ; - else - /* "info editing <exp>" should print around command number <exp>. */ - num = (parse_and_eval_address (arg) - history_base) - Hist_print / 2; - } - /* "info editing" means print the last Hist_print commands. */ - else - { - num = hist_len - Hist_print; - } - - if (num < 0) - num = 0; - - /* If there are at least Hist_print commands, we want to display the last - Hist_print rather than, say, the last 6. */ - if (hist_len - num < Hist_print) - { - num = hist_len - Hist_print; - if (num < 0) - num = 0; - } - - if (num == hist_len - Hist_print) - printf_filtered ("The list of the last %d commands is:\n\n", Hist_print); - else - printf_filtered ("Some of the stored commands are:\n\n"); - - for (offset = num; offset < num + Hist_print && offset < hist_len; offset++) - { - printf_filtered ("%5d %s\n", history_base + offset, - (history_get (history_base + offset))->line); - } - - /* The next command we want to display is the next one that we haven't - displayed yet. */ - num += Hist_print; - - /* If the user repeats this command with return, it should do what - "info editing +" does. This is unnecessary if arg is null, - because "info editing +" is not useful after "info editing". */ - if (from_tty && arg) - { - arg[0] = '+'; - arg[1] = '\0'; - } -} - -static void -set_history_expansion (arg, from_tty) - char *arg; - int from_tty; -{ - history_expansion_p = parse_binary_operation ("set history expansion", arg); -} - -static void -set_history_write (arg, from_tty) - char *arg; - int from_tty; -{ - write_history_p = parse_binary_operation ("set history write", arg); -} - -static void -set_history (arg, from_tty) - char *arg; - int from_tty; -{ - printf ("\"set history\" must be followed by the name of a history subcommand.\n"); - help_list (sethistlist, "set history ", -1, stdout); -} - -static void -set_history_size (arg, from_tty) - char *arg; - int from_tty; -{ - if (!*arg) - error_no_arg ("set history size"); - - history_size = atoi (arg); -} - -static void -set_history_filename (arg, from_tty) - char *arg; - int from_tty; -{ - int i; - - if (!arg) - error_no_arg ("history file name"); - - arg = tilde_expand (arg); - make_cleanup (free, arg); - - i = strlen (arg) - 1; - - free (history_filename); - - while (i > 0 && (arg[i] == ' ' || arg[i] == '\t')) - i--; - ++i; - - if (!*arg) - history_filename = (char *) 0; - else - history_filename = savestring (arg, i + 1); - history_filename[i] = '\0'; -} - -int info_verbose; - -static void -set_verbose_command (arg, from_tty) - char *arg; - int from_tty; -{ - info_verbose = parse_binary_operation ("set verbose", arg); -} - -static void -verbose_info (arg, from_tty) - char *arg; - int from_tty; -{ - if (arg) - error ("\"info verbose\" does not take any arguments.\n"); - - printf ("Verbose printing of information is %s.\n", - info_verbose ? "on" : "off"); -} - -static void -float_handler () -{ - error ("Invalid floating value encountered or computed."); -} - - -static void -initialize_cmd_lists () -{ - cmdlist = (struct cmd_list_element *) 0; - infolist = (struct cmd_list_element *) 0; - enablelist = (struct cmd_list_element *) 0; - disablelist = (struct cmd_list_element *) 0; - deletelist = (struct cmd_list_element *) 0; - enablebreaklist = (struct cmd_list_element *) 0; - setlist = (struct cmd_list_element *) 0; - sethistlist = (struct cmd_list_element *) 0; - unsethistlist = (struct cmd_list_element *) 0; -} - -static void -initialize_main () -{ - char *tmpenv; - /* Command line editing externals. */ - extern int (*rl_completion_entry_function)(); - extern char *rl_completer_word_break_characters; - extern char *rl_readline_name; - - /* Set default verbose mode on. */ - info_verbose = 1; - -#ifdef KERNELDEBUG - if (kernel_debugging) - prompt = savestring ("(kgdb) ", 7); - else -#endif - prompt = savestring ("(gdb) ", 6); - - /* Set the important stuff up for command editing. */ - command_editing_p = 1; - history_expansion_p = 0; - write_history_p = 0; - - if (tmpenv = getenv ("HISTSIZE")) - history_size = atoi (tmpenv); - else - history_size = 256; - - stifle_history (history_size); - - if (tmpenv = getenv ("GDBHISTFILE")) - history_filename = savestring (tmpenv, strlen(tmpenv)); - else - /* We include the current directory so that if the user changes - directories the file written will be the same as the one - that was read. */ - history_filename = concat (current_directory, "/.gdb_history", ""); - - read_history (history_filename); - - /* Setup important stuff for command line editing. */ - rl_completion_entry_function = (int (*)()) symbol_completion_function; - rl_completer_word_break_characters = gdb_completer_word_break_characters; - rl_readline_name = "gdb"; - - /* Define the classes of commands. - They will appear in the help list in the reverse of this order. */ - - add_cmd ("obscure", class_obscure, 0, "Obscure features.", &cmdlist); - add_cmd ("alias", class_alias, 0, "Aliases of other commands.", &cmdlist); - add_cmd ("user", class_user, 0, "User-defined commands.\n\ -The commands in this class are those defined by the user.\n\ -Use the \"define\" command to define a command.", &cmdlist); - add_cmd ("support", class_support, 0, "Support facilities.", &cmdlist); - add_cmd ("status", class_info, 0, "Status inquiries.", &cmdlist); - add_cmd ("files", class_files, 0, "Specifying and examining files.", &cmdlist); - add_cmd ("breakpoints", class_breakpoint, 0, "Making program stop at certain points.", &cmdlist); - add_cmd ("data", class_vars, 0, "Examining data.", &cmdlist); - add_cmd ("stack", class_stack, 0, "Examining the stack.\n\ -The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\ -counting from zero for the innermost (currently executing) frame.\n\n\ -At any time gdb identifies one frame as the \"selected\" frame.\n\ -Variable lookups are done with respect to the selected frame.\n\ -When the program being debugged stops, gdb selects the innermost frame.\n\ -The commands below can be used to select other frames by number or address.", - &cmdlist); - add_cmd ("running", class_run, 0, "Running the program.", &cmdlist); - - add_com ("pwd", class_files, pwd_command, - "Print working directory. This is used for your program as well."); - add_com ("cd", class_files, cd_command, - "Set working directory to DIR for debugger and program being debugged.\n\ -The change does not take effect for the program being debugged\n\ -until the next time it is started."); - - add_cmd ("prompt", class_support, set_prompt_command, - "Change gdb's prompt from the default of \"(gdb)\"", - &setlist); - add_com ("echo", class_support, echo_command, - "Print a constant string. Give string as argument.\n\ -C escape sequences may be used in the argument.\n\ -No newline is added at the end of the argument;\n\ -use \"\\n\" if you want a newline to be printed.\n\ -Since leading and trailing whitespace are ignored in command arguments,\n\ -if you want to print some you must use \"\\\" before leading whitespace\n\ -to be printed or after trailing whitespace."); - add_com ("document", class_support, document_command, - "Document a user-defined command.\n\ -Give command name as argument. Give documentation on following lines.\n\ -End with a line of just \"end\"."); - add_com ("define", class_support, define_command, - "Define a new command name. Command name is argument.\n\ -Definition appears on following lines, one command per line.\n\ -End with a line of just \"end\".\n\ -Use the \"document\" command to give documentation for the new command.\n\ -Commands defined in this way do not take arguments."); - - add_com ("source", class_support, source_command, - "Read commands from a file named FILE.\n\ -Note that the file \".gdbinit\" is read automatically in this way\n\ -when gdb is started."); - add_com ("quit", class_support, quit_command, "Exit gdb."); - add_com ("help", class_support, help_command, "Print list of commands."); - add_com_alias ("q", "quit", class_support, 1); - add_com_alias ("h", "help", class_support, 1); - add_com ("while", class_support, while_command, - "execute following commands while condition is true.\n\ -Expression for condition follows \"while\" keyword."); - add_com ("if", class_support, if_command, - "execute following commands if condition is true.\n\ -Expression for condition follows \"if\" keyword."); - add_cmd ("verbose", class_support, set_verbose_command, - "Change the number of informational messages gdb prints.", - &setlist); - add_info ("verbose", verbose_info, - "Status of gdb's verbose printing option.\n"); - - add_com ("dump-me", class_obscure, dump_me_command, - "Get fatal error; make debugger dump its core."); - - add_cmd ("editing", class_support, set_editing, - "Enable or disable command line editing.\n\ -Use \"on\" to enable to enable the editing, and \"off\" to disable it.\n\ -Without an argument, command line editing is enabled.", &setlist); - - add_prefix_cmd ("history", class_support, set_history, - "Generic command for setting command history parameters.", - &sethistlist, "set history ", 0, &setlist); - - add_cmd ("expansion", no_class, set_history_expansion, - "Enable or disable history expansion on command input.\n\ -Without an argument, history expansion is enabled.", &sethistlist); - - add_cmd ("write", no_class, set_history_write, - "Enable or disable saving of the history record on exit.\n\ -Use \"on\" to enable to enable the saving, and \"off\" to disable it.\n\ -Without an argument, saving is enabled.", &sethistlist); - - add_cmd ("size", no_class, set_history_size, - "Set the size of the command history, \n\ -ie. the number of previous commands to keep a record of.", &sethistlist); - - add_cmd ("filename", no_class, set_history_filename, - "Set the filename in which to record the command history\n\ - (the list of previous commands of which a record is kept).", &sethistlist); - - add_prefix_cmd ("info", class_info, info_command, - "Generic command for printing status.", - &infolist, "info ", 0, &cmdlist); - add_com_alias ("i", "info", class_info, 1); - - add_info ("editing", editing_info, "Status of command editor."); - - add_info ("version", version_info, "Report what version of GDB this is."); -} |