diff options
Diffstat (limited to 'gdb/command.c')
| -rw-r--r-- | gdb/command.c | 1564 |
1 files changed, 0 insertions, 1564 deletions
diff --git a/gdb/command.c b/gdb/command.c deleted file mode 100644 index 58af567..0000000 --- a/gdb/command.c +++ /dev/null @@ -1,1564 +0,0 @@ -/* Handle lists of commands, their decoding and documentation, for GDB. - Copyright 1986, 1989, 1990, 1991, 1998 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 -the Free Software Foundation; either version 2 of the License, or -(at your option) any later version. - -This program 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 this program; if not, write to the Free Software -Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ - -#include "defs.h" -#include "gdbcmd.h" -#include "symtab.h" -#include "value.h" -#include <ctype.h> -#include "gdb_string.h" -#ifdef HAVE_UNISTD_H -#include <unistd.h> -#endif - -#ifdef HAVE_WAIT_H -# include <wait.h> -#else -# ifdef HAVE_SYS_WAIT_H -# include <sys/wait.h> -# endif -#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 make_command PARAMS ((char *, int)); - -static void shell_escape PARAMS ((char *, int)); - -static int parse_binary_operation PARAMS ((char *)); - -static void print_doc_line PARAMS ((GDB_FILE *, char *)); - -void _initialize_command PARAMS ((void)); - -/* Add element named NAME. - CLASS is the top level category into which commands are broken down - for "help" purposes. - FUN should be the function to execute the command; - it will get a character string as argument, with leading - and trailing blanks already eliminated. - - DOC is a documentation string for the command. - Its first line should be a complete sentence. - It should start with ? for a command that is an abbreviation - or with * for a command that most users don't need to know about. - - Add this command to command list *LIST. - - Returns a pointer to the added command (not necessarily the head - of *LIST). */ - -struct cmd_list_element * -add_cmd (name, class, fun, doc, list) - char *name; - enum command_class class; - void (*fun) PARAMS ((char *, int)); - char *doc; - struct cmd_list_element **list; -{ - register struct cmd_list_element *c - = (struct cmd_list_element *) xmalloc (sizeof (struct cmd_list_element)); - struct cmd_list_element *p; - - delete_cmd (name, list); - - if (*list == NULL || STRCMP ((*list)->name, name) >= 0) - { - c->next = *list; - *list = c; - } - else - { - p = *list; - while (p->next && STRCMP (p->next->name, name) <= 0) - { - p = p->next; - } - c->next = p->next; - p->next = c; - } - - c->name = name; - c->class = class; - c->function.cfunc = fun; - c->doc = doc; - c->hook = NULL; - c->prefixlist = NULL; - c->prefixname = NULL; - c->allow_unknown = 0; - c->abbrev_flag = 0; - c->completer = make_symbol_completion_list; - c->type = not_set_cmd; - c->var = NULL; - c->var_type = var_boolean; - c->enums = NULL; - c->user_commands = NULL; - c->hookee = NULL; - c->cmd_pointer = NULL; - - return c; -} - -/* Same as above, except that the abbrev_flag is set. */ - -#if 0 /* Currently unused */ - -struct cmd_list_element * -add_abbrev_cmd (name, class, fun, doc, list) - char *name; - enum command_class class; - void (*fun) PARAMS ((char *, int)); - char *doc; - struct cmd_list_element **list; -{ - register struct cmd_list_element *c - = add_cmd (name, class, fun, doc, list); - - c->abbrev_flag = 1; - return c; -} - -#endif - -struct cmd_list_element * -add_alias_cmd (name, oldname, class, abbrev_flag, list) - char *name; - char *oldname; - enum command_class class; - int abbrev_flag; - struct cmd_list_element **list; -{ - /* Must do this since lookup_cmd tries to side-effect its first arg */ - char *copied_name; - register struct cmd_list_element *old; - register struct cmd_list_element *c; - copied_name = (char *) alloca (strlen (oldname) + 1); - strcpy (copied_name, oldname); - old = lookup_cmd (&copied_name, *list, "", 1, 1); - - if (old == 0) - { - delete_cmd (name, list); - return 0; - } - - c = add_cmd (name, class, old->function.cfunc, old->doc, list); - c->prefixlist = old->prefixlist; - c->prefixname = old->prefixname; - c->allow_unknown = old->allow_unknown; - c->abbrev_flag = abbrev_flag; - c->cmd_pointer = old; - return c; -} - -/* Like add_cmd but adds an element for a command prefix: - a name that should be followed by a subcommand to be looked up - in another command list. PREFIXLIST should be the address - of the variable containing that list. */ - -struct cmd_list_element * -add_prefix_cmd (name, class, fun, doc, prefixlist, prefixname, - allow_unknown, list) - char *name; - enum command_class class; - void (*fun) PARAMS ((char *, int)); - char *doc; - struct cmd_list_element **prefixlist; - char *prefixname; - int allow_unknown; - struct cmd_list_element **list; -{ - register struct cmd_list_element *c = add_cmd (name, class, fun, doc, list); - c->prefixlist = prefixlist; - c->prefixname = prefixname; - c->allow_unknown = allow_unknown; - return c; -} - -/* Like add_prefix_cmd but sets the abbrev_flag on the new command. */ - -struct cmd_list_element * -add_abbrev_prefix_cmd (name, class, fun, doc, prefixlist, prefixname, - allow_unknown, list) - char *name; - enum command_class class; - void (*fun) PARAMS ((char *, int)); - char *doc; - struct cmd_list_element **prefixlist; - char *prefixname; - int allow_unknown; - struct cmd_list_element **list; -{ - register struct cmd_list_element *c = add_cmd (name, class, fun, doc, list); - c->prefixlist = prefixlist; - c->prefixname = prefixname; - c->allow_unknown = allow_unknown; - c->abbrev_flag = 1; - return c; -} - -/* This is an empty "cfunc". */ -void -not_just_help_class_command (args, from_tty) - char *args; - int from_tty; -{ -} - -/* This is an empty "sfunc". */ -static void empty_sfunc PARAMS ((char *, int, struct cmd_list_element *)); - -static void -empty_sfunc (args, from_tty, c) - char *args; - int from_tty; - struct cmd_list_element *c; -{ -} - -/* Add element named NAME to command list LIST (the list for set - or some sublist thereof). - CLASS is as in add_cmd. - VAR_TYPE is the kind of thing we are setting. - VAR is address of the variable being controlled by this command. - DOC is the documentation string. */ - -struct cmd_list_element * -add_set_cmd (name, class, var_type, var, doc, list) - char *name; - enum command_class class; - var_types var_type; - char *var; - char *doc; - struct cmd_list_element **list; -{ - struct cmd_list_element *c - = add_cmd (name, class, NO_FUNCTION, doc, list); - - c->type = set_cmd; - c->var_type = var_type; - c->var = var; - /* This needs to be something besides NO_FUNCTION so that this isn't - treated as a help class. */ - c->function.sfunc = empty_sfunc; - return c; -} - -/* Add element named NAME to command list LIST (the list for set - or some sublist thereof). - CLASS is as in add_cmd. - ENUMLIST is a list of strings which may follow NAME. - VAR is address of the variable which will contain the matching string - (from ENUMLIST). - DOC is the documentation string. */ - -struct cmd_list_element * -add_set_enum_cmd (name, class, enumlist, var, doc, list) - char *name; - enum command_class class; - char *enumlist[]; - char *var; - char *doc; - struct cmd_list_element **list; -{ - struct cmd_list_element *c - = add_set_cmd (name, class, var_enum, var, doc, list); - c->enums = enumlist; - - return c; -} - -/* Where SETCMD has already been added, add the corresponding show - command to LIST and return a pointer to the added command (not - necessarily the head of LIST). */ -struct cmd_list_element * -add_show_from_set (setcmd, list) - struct cmd_list_element *setcmd; - struct cmd_list_element **list; -{ - struct cmd_list_element *showcmd = - (struct cmd_list_element *) xmalloc (sizeof (struct cmd_list_element)); - struct cmd_list_element *p; - - memcpy (showcmd, setcmd, sizeof (struct cmd_list_element)); - delete_cmd (showcmd->name, list); - showcmd->type = show_cmd; - - /* Replace "set " at start of docstring with "show ". */ - if (setcmd->doc[0] == 'S' && setcmd->doc[1] == 'e' - && setcmd->doc[2] == 't' && setcmd->doc[3] == ' ') - showcmd->doc = concat ("Show ", setcmd->doc + 4, NULL); - else - fprintf_unfiltered (gdb_stderr, "GDB internal error: Bad docstring for set command\n"); - - if (*list == NULL || STRCMP ((*list)->name, showcmd->name) >= 0) - { - showcmd->next = *list; - *list = showcmd; - } - else - { - p = *list; - while (p->next && STRCMP (p->next->name, showcmd->name) <= 0) - { - p = p->next; - } - showcmd->next = p->next; - p->next = showcmd; - } - - return showcmd; -} - -/* Remove the command named NAME from the command list. */ - -void -delete_cmd (name, list) - char *name; - struct cmd_list_element **list; -{ - register struct cmd_list_element *c; - struct cmd_list_element *p; - - while (*list && STREQ ((*list)->name, name)) - { - if ((*list)->hookee) - (*list)->hookee->hook = 0; /* Hook slips out of its mouth */ - p = (*list)->next; - free ((PTR)*list); - *list = p; - } - - if (*list) - for (c = *list; c->next;) - { - if (STREQ (c->next->name, name)) - { - if (c->next->hookee) - c->next->hookee->hook = 0; /* hooked cmd gets away. */ - p = c->next->next; - free ((PTR)c->next); - c->next = p; - } - else - c = c->next; - } -} - -/* This command really has to deal with two things: - * 1) I want documentation on *this string* (usually called by - * "help commandname"). - * 2) I want documentation on *this list* (usually called by - * giving a command that requires subcommands. Also called by saying - * just "help".) - * - * I am going to split this into two seperate comamnds, help_cmd and - * help_list. - */ - -void -help_cmd (command, stream) - char *command; - GDB_FILE *stream; -{ - struct cmd_list_element *c; - extern struct cmd_list_element *cmdlist; - - if (!command) - { - help_list (cmdlist, "", all_classes, stream); - return; - } - - c = lookup_cmd (&command, cmdlist, "", 0, 0); - - if (c == 0) - return; - - /* There are three cases here. - If c->prefixlist is nonzero, we have a prefix command. - Print its documentation, then list its subcommands. - - If c->function is nonzero, we really have a command. - Print its documentation and return. - - If c->function is zero, we have a class name. - Print its documentation (as if it were a command) - and then set class to the number of this class - so that the commands in the class will be listed. */ - - fputs_filtered (c->doc, stream); - fputs_filtered ("\n", stream); - - if (c->prefixlist == 0 && c->function.cfunc != NULL) - return; - fprintf_filtered (stream, "\n"); - - /* If this is a prefix command, print it's subcommands */ - if (c->prefixlist) - help_list (*c->prefixlist, c->prefixname, all_commands, stream); - - /* If this is a class name, print all of the commands in the class */ - if (c->function.cfunc == NULL) - help_list (cmdlist, "", c->class, stream); - - if (c->hook) - fprintf_filtered (stream, "\nThis command has a hook defined: %s\n", - c->hook->name); -} - -/* - * Get a specific kind of help on a command list. - * - * LIST is the list. - * CMDTYPE is the prefix to use in the title string. - * CLASS is the class with which to list the nodes of this list (see - * documentation for help_cmd_list below), As usual, ALL_COMMANDS for - * everything, ALL_CLASSES for just classes, and non-negative for only things - * in a specific class. - * and STREAM is the output stream on which to print things. - * If you call this routine with a class >= 0, it recurses. - */ -void -help_list (list, cmdtype, class, stream) - struct cmd_list_element *list; - char *cmdtype; - enum command_class class; - GDB_FILE *stream; -{ - int len; - char *cmdtype1, *cmdtype2; - - /* If CMDTYPE is "foo ", CMDTYPE1 gets " foo" and CMDTYPE2 gets "foo sub" */ - len = strlen (cmdtype); - cmdtype1 = (char *) alloca (len + 1); - cmdtype1[0] = 0; - cmdtype2 = (char *) alloca (len + 4); - cmdtype2[0] = 0; - if (len) - { - cmdtype1[0] = ' '; - strncpy (cmdtype1 + 1, cmdtype, len - 1); - cmdtype1[len] = 0; - strncpy (cmdtype2, cmdtype, len - 1); - strcpy (cmdtype2 + len - 1, " sub"); - } - - if (class == all_classes) - fprintf_filtered (stream, "List of classes of %scommands:\n\n", cmdtype2); - else - fprintf_filtered (stream, "List of %scommands:\n\n", cmdtype2); - - help_cmd_list (list, class, cmdtype, (int)class >= 0, stream); - - if (class == all_classes) - fprintf_filtered (stream, "\n\ -Type \"help%s\" followed by a class name for a list of commands in that class.", - cmdtype1); - - fprintf_filtered (stream, "\n\ -Type \"help%s\" followed by %scommand name for full documentation.\n\ -Command name abbreviations are allowed if unambiguous.\n", - cmdtype1, cmdtype2); -} - -/* Print only the first line of STR on STREAM. */ -static void -print_doc_line (stream, str) - GDB_FILE *stream; - char *str; -{ - static char *line_buffer = 0; - static int line_size; - register char *p; - - if (!line_buffer) - { - line_size = 80; - line_buffer = (char *) xmalloc (line_size); - } - - p = str; - while (*p && *p != '\n' && *p != '.' && *p != ',') - p++; - if (p - str > line_size - 1) - { - line_size = p - str + 1; - free ((PTR)line_buffer); - line_buffer = (char *) xmalloc (line_size); - } - strncpy (line_buffer, str, p - str); - line_buffer[p - str] = '\0'; - if (islower (line_buffer[0])) - line_buffer[0] = toupper (line_buffer[0]); - fputs_filtered (line_buffer, stream); -} - -/* - * Implement a help command on command list LIST. - * RECURSE should be non-zero if this should be done recursively on - * all sublists of LIST. - * PREFIX is the prefix to print before each command name. - * STREAM is the stream upon which the output should be written. - * CLASS should be: - * A non-negative class number to list only commands in that - * class. - * ALL_COMMANDS to list all commands in list. - * ALL_CLASSES to list all classes in list. - * - * Note that RECURSE will be active on *all* sublists, not just the - * ones selected by the criteria above (ie. the selection mechanism - * is at the low level, not the high-level). - */ -void -help_cmd_list (list, class, prefix, recurse, stream) - struct cmd_list_element *list; - enum command_class class; - char *prefix; - int recurse; - GDB_FILE *stream; -{ - register struct cmd_list_element *c; - - for (c = list; c; c = c->next) - { - if (c->abbrev_flag == 0 && - (class == all_commands - || (class == all_classes && c->function.cfunc == NULL) - || (class == c->class && c->function.cfunc != NULL))) - { - fprintf_filtered (stream, "%s%s -- ", prefix, c->name); - print_doc_line (stream, c->doc); - fputs_filtered ("\n", stream); - } - if (recurse - && c->prefixlist != 0 - && c->abbrev_flag == 0) - help_cmd_list (*c->prefixlist, class, c->prefixname, 1, stream); - } -} - - -/* Search the input clist for 'command'. Return the command if - found (or NULL if not), and return the number of commands - found in nfound */ - -static struct cmd_list_element * -find_cmd(command, len, clist, ignore_help_classes, nfound) - char *command; - struct cmd_list_element *clist; - int ignore_help_classes; - int *nfound; -{ - struct cmd_list_element *found, *c; - - found = (struct cmd_list_element *)NULL; - *nfound = 0; - for (c = clist; c; c = c->next) - if (!strncmp (command, c->name, len) - && (!ignore_help_classes || c->function.cfunc)) - { - found = c; - (*nfound)++; - if (c->name[len] == '\0') - { - *nfound = 1; - break; - } - } - return found; -} - -/* This routine takes a line of TEXT and a CLIST in which to start the - lookup. When it returns it will have incremented the text pointer past - the section of text it matched, set *RESULT_LIST to point to the list in - which the last word was matched, and will return a pointer to the cmd - list element which the text matches. It will return NULL if no match at - all was possible. It will return -1 (cast appropriately, ick) if ambigous - matches are possible; in this case *RESULT_LIST will be set to point to - the list in which there are ambiguous choices (and *TEXT will be set to - the ambiguous text string). - - If the located command was an abbreviation, this routine returns the base - command of the abbreviation. - - It does no error reporting whatsoever; control will always return - to the superior routine. - - In the case of an ambiguous return (-1), *RESULT_LIST will be set to point - at the prefix_command (ie. the best match) *or* (special case) will be NULL - if no prefix command was ever found. For example, in the case of "info a", - "info" matches without ambiguity, but "a" could be "args" or "address", so - *RESULT_LIST is set to the cmd_list_element for "info". So in this case - RESULT_LIST should not be interpeted as a pointer to the beginning of a - list; it simply points to a specific command. In the case of an ambiguous - return *TEXT is advanced past the last non-ambiguous prefix (e.g. - "info t" can be "info types" or "info target"; upon return *TEXT has been - advanced past "info "). - - If RESULT_LIST is NULL, don't set *RESULT_LIST (but don't otherwise - affect the operation). - - This routine does *not* modify the text pointed to by TEXT. - - If IGNORE_HELP_CLASSES is nonzero, ignore any command list elements which - are actually help classes rather than commands (i.e. the function field of - the struct cmd_list_element is NULL). */ - -struct cmd_list_element * -lookup_cmd_1 (text, clist, result_list, ignore_help_classes) - char **text; - struct cmd_list_element *clist, **result_list; - int ignore_help_classes; -{ - char *p, *command; - int len, tmp, nfound; - struct cmd_list_element *found, *c; - - 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 0. */ - 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. */ - found = 0; - nfound = 0; - found = find_cmd(command, len, clist, ignore_help_classes, &nfound); - - /* - ** We didn't find the command in the entered case, so lower case it - ** and search again. - */ - if (!found || nfound == 0) - { - for (tmp = 0; tmp < len; tmp++) - { - char x = command[tmp]; - command[tmp] = isupper(x) ? tolower(x) : x; - } - found = find_cmd(command, len, clist, ignore_help_classes, &nfound); - } - - /* If nothing matches, we have a simple failure. */ - if (nfound == 0) - return 0; - - if (nfound > 1) - { - if (result_list != NULL) - /* Will be modified in calling routine - if we know what the prefix command is. */ - *result_list = 0; - return (struct cmd_list_element *) -1; /* Ambiguous. */ - } - - /* We've matched something on this list. Move text pointer forward. */ - - *text = p; - - /* If this was an abbreviation, use the base command instead. */ - - if (found->cmd_pointer) - found = found->cmd_pointer; - - /* If we found a prefix command, keep looking. */ - - if (found->prefixlist) - { - c = lookup_cmd_1 (text, *found->prefixlist, result_list, - ignore_help_classes); - if (!c) - { - /* Didn't find anything; this is as far as we got. */ - if (result_list != NULL) - *result_list = clist; - return found; - } - else if (c == (struct cmd_list_element *) -1) - { - /* We've gotten this far properly, but the next step - is ambiguous. We need to set the result list to the best - we've found (if an inferior hasn't already set it). */ - if (result_list != NULL) - if (!*result_list) - /* This used to say *result_list = *found->prefixlist - If that was correct, need to modify the documentation - at the top of this function to clarify what is supposed - to be going on. */ - *result_list = found; - return c; - } - else - { - /* We matched! */ - return c; - } - } - else - { - if (result_list != NULL) - *result_list = clist; - return found; - } -} - -/* All this hair to move the space to the front of cmdtype */ - -static void -undef_cmd_error (cmdtype, q) - char *cmdtype, *q; -{ - error ("Undefined %scommand: \"%s\". Try \"help%s%.*s\".", - cmdtype, - q, - *cmdtype? " ": "", - strlen(cmdtype)-1, - cmdtype); -} - -/* Look up the contents of *LINE as a command in the command list LIST. - LIST is a chain of struct cmd_list_element's. - If it is found, return the struct cmd_list_element for that command - and update *LINE to point after the command name, at the first argument. - If not found, call error if ALLOW_UNKNOWN is zero - otherwise (or if error returns) return zero. - Call error if specified command is ambiguous, - unless ALLOW_UNKNOWN is negative. - CMDTYPE precedes the word "command" in the error message. - - If INGNORE_HELP_CLASSES is nonzero, ignore any command list - elements which are actually help classes rather than commands (i.e. - the function field of the struct cmd_list_element is 0). */ - -struct cmd_list_element * -lookup_cmd (line, list, cmdtype, allow_unknown, ignore_help_classes) - char **line; - struct cmd_list_element *list; - char *cmdtype; - int allow_unknown; - int ignore_help_classes; -{ - struct cmd_list_element *last_list = 0; - struct cmd_list_element *c = - lookup_cmd_1 (line, list, &last_list, ignore_help_classes); -#if 0 - /* This is wrong for complete_command. */ - char *ptr = (*line) + strlen (*line) - 1; - - /* Clear off trailing whitespace. */ - while (ptr >= *line && (*ptr == ' ' || *ptr == '\t')) - ptr--; - *(ptr + 1) = '\0'; -#endif - - if (!c) - { - if (!allow_unknown) - { - if (!*line) - error ("Lack of needed %scommand", cmdtype); - else - { - char *p = *line, *q; - - while (isalnum(*p) || *p == '-') - p++; - - q = (char *) alloca (p - *line + 1); - strncpy (q, *line, p - *line); - q[p - *line] = '\0'; - undef_cmd_error (cmdtype, q); - } - } - else - return 0; - } - else if (c == (struct cmd_list_element *) -1) - { - /* Ambigous. Local values should be off prefixlist or called - values. */ - int local_allow_unknown = (last_list ? last_list->allow_unknown : - allow_unknown); - char *local_cmdtype = last_list ? last_list->prefixname : cmdtype; - struct cmd_list_element *local_list = - (last_list ? *(last_list->prefixlist) : list); - - if (local_allow_unknown < 0) - { - if (last_list) - return last_list; /* Found something. */ - else - return 0; /* Found nothing. */ - } - else - { - /* Report as error. */ - int amb_len; - char ambbuf[100]; - - for (amb_len = 0; - ((*line)[amb_len] && (*line)[amb_len] != ' ' - && (*line)[amb_len] != '\t'); - amb_len++) - ; - - ambbuf[0] = 0; - for (c = local_list; c; c = c->next) - if (!strncmp (*line, c->name, amb_len)) - { - if (strlen (ambbuf) + strlen (c->name) + 6 < (int)sizeof ambbuf) - { - if (strlen (ambbuf)) - strcat (ambbuf, ", "); - strcat (ambbuf, c->name); - } - else - { - strcat (ambbuf, ".."); - break; - } - } - error ("Ambiguous %scommand \"%s\": %s.", local_cmdtype, - *line, ambbuf); - return 0; /* lint */ - } - } - else - { - /* We've got something. It may still not be what the caller - wants (if this command *needs* a subcommand). */ - while (**line == ' ' || **line == '\t') - (*line)++; - - if (c->prefixlist && **line && !c->allow_unknown) - undef_cmd_error (c->prefixname, *line); - - /* Seems to be what he wants. Return it. */ - return c; - } - return 0; -} - -#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. - If it is found, return the struct cmd_list_element for that command - and update *LINE to point after the command name, at the first argument. - If not found, call error if ALLOW_UNKNOWN is zero - otherwise (or if error returns) return zero. - Call error if specified command is ambiguous, - unless ALLOW_UNKNOWN is negative. - CMDTYPE precedes the word "command" in the error message. */ - -struct cmd_list_element * -lookup_cmd (line, list, cmdtype, allow_unknown) - char **line; - struct cmd_list_element *list; - char *cmdtype; - int allow_unknown; -{ - register char *p; - register struct cmd_list_element *c, *found; - int nfound; - char ambbuf[100]; - char *processed_cmd; - int i, cmd_len; - - /* Skip leading whitespace. */ - - while (**line == ' ' || **line == '\t') - (*line)++; - - /* Clear out trailing whitespace. */ - - p = *line + strlen (*line); - while (p != *line && (p[-1] == ' ' || p[-1] == '\t')) - p--; - *p = 0; - - /* Find end of command name. */ - - p = *line; - while (*p == '-' || isalnum(*p)) - p++; - - /* Look up the command name. - If exact match, keep that. - Otherwise, take command abbreviated, if unique. Note that (in my - opinion) a null string does *not* indicate ambiguity; simply the - end of the argument. */ - - if (p == *line) - { - if (!allow_unknown) - error ("Lack of needed %scommand", cmdtype); - return 0; - } - - /* Copy over to a local buffer, converting to lowercase on the way. - This is in case the command being parsed is a subcommand which - doesn't match anything, and that's ok. We want the original - untouched for the routine of the original command. */ - - processed_cmd = (char *) alloca (p - *line + 1); - for (cmd_len = 0; cmd_len < p - *line; cmd_len++) - { - char x = (*line)[cmd_len]; - if (isupper(x)) - processed_cmd[cmd_len] = tolower(x); - else - processed_cmd[cmd_len] = x; - } - processed_cmd[cmd_len] = '\0'; - - /* Check all possibilities in the current command list. */ - found = 0; - nfound = 0; - for (c = list; c; c = c->next) - { - if (!strncmp (processed_cmd, c->name, cmd_len)) - { - found = c; - nfound++; - if (c->name[cmd_len] == 0) - { - nfound = 1; - break; - } - } - } - - /* Report error for undefined command name. */ - - if (nfound != 1) - { - if (nfound > 1 && allow_unknown >= 0) - { - ambbuf[0] = 0; - for (c = list; c; c = c->next) - if (!strncmp (processed_cmd, c->name, cmd_len)) - { - if (strlen (ambbuf) + strlen (c->name) + 6 < sizeof ambbuf) - { - if (strlen (ambbuf)) - strcat (ambbuf, ", "); - strcat (ambbuf, c->name); - } - else - { - strcat (ambbuf, ".."); - break; - } - } - error ("Ambiguous %scommand \"%s\": %s.", cmdtype, - processed_cmd, ambbuf); - } - else if (!allow_unknown) - error ("Undefined %scommand: \"%s\".", cmdtype, processed_cmd); - return 0; - } - - /* Skip whitespace before the argument. */ - - while (*p == ' ' || *p == '\t') p++; - *line = p; - - if (found->prefixlist && *p) - { - c = lookup_cmd (line, *found->prefixlist, found->prefixname, - found->allow_unknown); - if (c) - return c; - } - - return found; -} -#endif - -/* Helper function for SYMBOL_COMPLETION_FUNCTION. */ - -/* Return a vector of char pointers which point to the different - possible completions in LIST of TEXT. - - WORD points in the same buffer as TEXT, and completions should be - returned relative to this position. For example, suppose TEXT is "foo" - and we want to complete to "foobar". If WORD is "oo", return - "oobar"; if WORD is "baz/foo", return "baz/foobar". */ - -char ** -complete_on_cmdlist (list, text, word) - struct cmd_list_element *list; - char *text; - char *word; -{ - struct cmd_list_element *ptr; - char **matchlist; - int sizeof_matchlist; - int matches; - int textlen = strlen (text); - - sizeof_matchlist = 10; - matchlist = (char **) xmalloc (sizeof_matchlist * sizeof (char *)); - matches = 0; - - for (ptr = list; ptr; ptr = ptr->next) - if (!strncmp (ptr->name, text, textlen) - && !ptr->abbrev_flag - && (ptr->function.cfunc - || ptr->prefixlist)) - { - if (matches == sizeof_matchlist) - { - sizeof_matchlist *= 2; - matchlist = (char **) xrealloc ((char *)matchlist, - (sizeof_matchlist - * sizeof (char *))); - } - - matchlist[matches] = (char *) - xmalloc (strlen (word) + strlen (ptr->name) + 1); - if (word == text) - strcpy (matchlist[matches], ptr->name); - else if (word > text) - { - /* Return some portion of ptr->name. */ - strcpy (matchlist[matches], ptr->name + (word - text)); - } - else - { - /* Return some of text plus ptr->name. */ - strncpy (matchlist[matches], word, text - word); - matchlist[matches][text - word] = '\0'; - strcat (matchlist[matches], ptr->name); - } - ++matches; - } - - if (matches == 0) - { - free ((PTR)matchlist); - matchlist = 0; - } - else - { - matchlist = (char **) xrealloc ((char *)matchlist, ((matches + 1) - * sizeof (char *))); - matchlist[matches] = (char *) 0; - } - - return matchlist; -} - -/* Helper function for SYMBOL_COMPLETION_FUNCTION. */ - -/* Return a vector of char pointers which point to the different - possible completions in CMD of TEXT. - - WORD points in the same buffer as TEXT, and completions should be - returned relative to this position. For example, suppose TEXT is "foo" - and we want to complete to "foobar". If WORD is "oo", return - "oobar"; if WORD is "baz/foo", return "baz/foobar". */ - -char ** -complete_on_enum (enumlist, text, word) - char **enumlist; - char *text; - char *word; -{ - char **matchlist; - int sizeof_matchlist; - int matches; - int textlen = strlen (text); - int i; - char *name; - - sizeof_matchlist = 10; - matchlist = (char **) xmalloc (sizeof_matchlist * sizeof (char *)); - matches = 0; - - for (i = 0; (name = enumlist[i]) != NULL; i++) - if (strncmp (name, text, textlen) == 0) - { - if (matches == sizeof_matchlist) - { - sizeof_matchlist *= 2; - matchlist = (char **) xrealloc ((char *)matchlist, - (sizeof_matchlist - * sizeof (char *))); - } - - matchlist[matches] = (char *) - xmalloc (strlen (word) + strlen (name) + 1); - if (word == text) - strcpy (matchlist[matches], name); - else if (word > text) - { - /* Return some portion of name. */ - strcpy (matchlist[matches], name + (word - text)); - } - else - { - /* Return some of text plus name. */ - strncpy (matchlist[matches], word, text - word); - matchlist[matches][text - word] = '\0'; - strcat (matchlist[matches], name); - } - ++matches; - } - - if (matches == 0) - { - free ((PTR)matchlist); - matchlist = 0; - } - else - { - matchlist = (char **) xrealloc ((char *)matchlist, ((matches + 1) - * sizeof (char *))); - matchlist[matches] = (char *) 0; - } - - return matchlist; -} - -static int -parse_binary_operation (arg) - char *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 ("\"on\" or \"off\" expected."); - return 0; - } -} - -/* Do a "set" or "show" command. ARG is NULL if no argument, or the text - of the argument, and FROM_TTY is nonzero if this command is being entered - directly by the user (i.e. these are just like any other - command). C is the command list element for the command. */ -void -do_setshow_command (arg, from_tty, c) - char *arg; - int from_tty; - struct cmd_list_element *c; -{ - if (c->type == set_cmd) - { - switch (c->var_type) - { - case var_string: - { - char *new; - char *p; - char *q; - int ch; - - if (arg == NULL) - arg = ""; - new = (char *) xmalloc (strlen (arg) + 2); - p = arg; q = new; - while ((ch = *p++) != '\000') - { - if (ch == '\\') - { - /* \ at end of argument is used after spaces - so they won't be lost. */ - /* This is obsolete now that we no longer strip - trailing whitespace and actually, the backslash - didn't get here in my test, readline or - something did something funky with a backslash - right before a newline. */ - if (*p == 0) - break; - ch = parse_escape (&p); - if (ch == 0) - break; /* C loses */ - else if (ch > 0) - *q++ = ch; - } - else - *q++ = ch; - } -#if 0 - if (*(p - 1) != '\\') - *q++ = ' '; -#endif - *q++ = '\0'; - new = (char *) xrealloc (new, q - new); - if (*(char **)c->var != NULL) - free (*(char **)c->var); - *(char **) c->var = new; - } - break; - case var_string_noescape: - if (arg == NULL) - arg = ""; - if (*(char **)c->var != NULL) - free (*(char **)c->var); - *(char **) c->var = savestring (arg, strlen (arg)); - break; - case var_filename: - if (arg == NULL) - error_no_arg ("filename to set it to."); - if (*(char **)c->var != NULL) - free (*(char **)c->var); - *(char **)c->var = tilde_expand (arg); - break; - case var_boolean: - *(int *) c->var = parse_binary_operation (arg); - break; - case var_uinteger: - if (arg == NULL) - error_no_arg ("integer to set it to."); - *(unsigned int *) c->var = parse_and_eval_address (arg); - if (*(unsigned int *) c->var == 0) - *(unsigned int *) c->var = UINT_MAX; - break; - case var_integer: - { - unsigned int val; - if (arg == NULL) - error_no_arg ("integer to set it to."); - val = parse_and_eval_address (arg); - if (val == 0) - *(int *) c->var = INT_MAX; - else if (val >= INT_MAX) - error ("integer %u out of range", val); - else - *(int *) c->var = val; - break; - } - case var_zinteger: - if (arg == NULL) - error_no_arg ("integer to set it to."); - *(int *) c->var = parse_and_eval_address (arg); - break; - case var_enum: - { - int i; - int len; - int nmatches; - char *match = NULL; - char *p; - - /* if no argument was supplied, print an informative error message */ - if (arg == NULL) - { - char msg[1024]; - strcpy (msg, "Requires an argument. Valid arguments are "); - for (i = 0; c->enums[i]; i++) - { - if (i != 0) - strcat (msg, ", "); - strcat (msg, c->enums[i]); - } - strcat (msg, "."); - error (msg); - } - - p = strchr (arg, ' '); - - if (p) - len = p - arg; - else - len = strlen (arg); - - nmatches = 0; - for (i = 0; c->enums[i]; i++) - if (strncmp (arg, c->enums[i], len) == 0) - { - match = c->enums[i]; - nmatches++; - } - - if (nmatches <= 0) - error ("Undefined item: \"%s\".", arg); - - if (nmatches > 1) - error ("Ambiguous item \"%s\".", arg); - - *(char **)c->var = match; - } - break; - default: - error ("gdb internal error: bad var_type in do_setshow_command"); - } - } - else if (c->type == show_cmd) - { - /* Print doc minus "show" at start. */ - print_doc_line (gdb_stdout, c->doc + 5); - - fputs_filtered (" is ", gdb_stdout); - wrap_here (" "); - switch (c->var_type) - { - case var_string: - { - unsigned char *p; - - fputs_filtered ("\"", gdb_stdout); - if (*(unsigned char **)c->var) - for (p = *(unsigned char **) c->var; *p != '\0'; p++) - gdb_printchar (*p, gdb_stdout, '"'); - fputs_filtered ("\"", gdb_stdout); - } - break; - case var_string_noescape: - case var_filename: - case var_enum: - fputs_filtered ("\"", gdb_stdout); - if (*(char **)c->var) - fputs_filtered (*(char **) c->var, gdb_stdout); - fputs_filtered ("\"", gdb_stdout); - break; - case var_boolean: - fputs_filtered (*(int *) c->var ? "on" : "off", gdb_stdout); - break; - case var_uinteger: - if (*(unsigned int *) c->var == UINT_MAX) { - fputs_filtered ("unlimited", gdb_stdout); - break; - } - /* else fall through */ - case var_zinteger: - fprintf_filtered (gdb_stdout, "%u", *(unsigned int *) c->var); - break; - case var_integer: - if (*(int *) c->var == INT_MAX) - { - fputs_filtered ("unlimited", gdb_stdout); - } - else - fprintf_filtered (gdb_stdout, "%d", *(int *) c->var); - break; - - default: - error ("gdb internal error: bad var_type in do_setshow_command"); - } - fputs_filtered (".\n", gdb_stdout); - } - else - error ("gdb internal error: bad cmd_type in do_setshow_command"); - (*c->function.sfunc) (NULL, from_tty, c); -} - -/* Show all the settings in a list of show commands. */ - -void -cmd_show_list (list, from_tty, prefix) - struct cmd_list_element *list; - int from_tty; - char *prefix; -{ - for (; list != NULL; list = list->next) { - /* If we find a prefix, run its list, prefixing our output by its - prefix (with "show " skipped). */ - if (list->prefixlist && !list->abbrev_flag) - cmd_show_list (*list->prefixlist, from_tty, list->prefixname + 5); - if (list->type == show_cmd) - { - fputs_filtered (prefix, gdb_stdout); - fputs_filtered (list->name, gdb_stdout); - fputs_filtered (": ", gdb_stdout); - do_setshow_command ((char *)NULL, from_tty, list); - } - } -} - -/* ARGSUSED */ -static void -shell_escape (arg, from_tty) - char *arg; - int from_tty; -{ -#ifdef CANT_FORK - /* FIXME: what about errors (I don't know how GO32 system() handles - them)? */ - system (arg); -#else /* Can fork. */ - int rc, status, pid; - char *p, *user_shell; - - if ((user_shell = (char *) getenv ("SHELL")) == NULL) - user_shell = "/bin/sh"; - - /* Get the name of the shell for arg0 */ - if ((p = strrchr (user_shell, '/')) == NULL) - p = user_shell; - else - p++; /* Get past '/' */ - - if ((pid = fork()) == 0) - { - if (!arg) - execl (user_shell, p, 0); - else - execl (user_shell, p, "-c", arg, 0); - - fprintf_unfiltered (gdb_stderr, "Cannot execute %s: %s\n", user_shell, - safe_strerror (errno)); - gdb_flush (gdb_stderr); - _exit (0177); - } - - if (pid != -1) - while ((rc = wait (&status)) != pid && rc != -1) - ; - else - error ("Fork failed"); -#endif /* Can fork. */ -} - -static void -make_command (arg, from_tty) - char *arg; - int from_tty; -{ - char *p; - - if (arg == 0) - p = "make"; - else - { - p = xmalloc (sizeof("make ") + strlen(arg)); - strcpy (p, "make "); - strcpy (p + sizeof("make ")-1, arg); - } - - shell_escape (p, from_tty); -} - -static void -show_user_1 (c, stream) - struct cmd_list_element *c; - GDB_FILE *stream; -{ - register struct command_line *cmdlines; - - cmdlines = c->user_commands; - if (!cmdlines) - return; - fputs_filtered ("User command ", stream); - fputs_filtered (c->name, stream); - fputs_filtered (":\n", stream); - - while (cmdlines) - { - print_command_line (cmdlines, 4); - cmdlines = cmdlines->next; - } - fputs_filtered ("\n", stream); -} - -/* ARGSUSED */ -static void -show_user (args, from_tty) - char *args; - int from_tty; -{ - struct cmd_list_element *c; - extern struct cmd_list_element *cmdlist; - - if (args) - { - c = lookup_cmd (&args, cmdlist, "", 0, 1); - if (c->class != class_user) - error ("Not a user command."); - show_user_1 (c, gdb_stdout); - } - else - { - for (c = cmdlist; c; c = c->next) - { - if (c->class == class_user) - show_user_1 (c, gdb_stdout); - } - } -} - -void -_initialize_command () -{ - add_com ("shell", class_support, shell_escape, - "Execute the rest of the line as a shell command. \n\ -With no arguments, run an inferior shell."); - - if (xdb_commands) - add_com_alias("!", "shell", class_support, 0); - - add_com ("make", class_support, make_command, - "Run the ``make'' program using the rest of the line as arguments."); - add_cmd ("user", no_class, show_user, - "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); -} |