/* complete.c -- filename completion for readline. */ /* Copyright (C) 1987-2009 Free Software Foundation, Inc. This file is part of the GNU Readline Library (Readline), a library for reading lines of text with interactive input and history editing. Readline 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 3 of the License, or (at your option) any later version. Readline 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 Readline. If not, see . */ #define READLINE_LIBRARY #if defined (HAVE_CONFIG_H) # include #endif #include #include #if defined (HAVE_SYS_FILE_H) # include #endif #if defined (HAVE_UNISTD_H) # include #endif /* HAVE_UNISTD_H */ #if defined (HAVE_STDLIB_H) # include #else # include "ansi_stdlib.h" #endif /* HAVE_STDLIB_H */ #include #include #if !defined (errno) extern int errno; #endif /* !errno */ #if defined (HAVE_PWD_H) #include #endif #include "posixdir.h" #include "posixstat.h" /* System-specific feature definitions and include files. */ #include "rldefs.h" #include "rlmbutil.h" /* Some standard library routines. */ #include "readline.h" #include "xmalloc.h" #include "rlprivate.h" #ifdef __STDC__ typedef int QSFUNC (const void *, const void *); #else typedef int QSFUNC (); #endif #ifdef HAVE_LSTAT # define LSTAT lstat #else # define LSTAT stat #endif /* Unix version of a hidden file. Could be different on other systems. */ #define HIDDEN_FILE(fname) ((fname)[0] == '.') /* Most systems don't declare getpwent in if _POSIX_SOURCE is defined. */ #if defined (HAVE_GETPWENT) && (!defined (HAVE_GETPW_DECLS) || defined (_POSIX_SOURCE)) extern struct passwd *getpwent PARAMS((void)); #endif /* HAVE_GETPWENT && (!HAVE_GETPW_DECLS || _POSIX_SOURCE) */ /* If non-zero, then this is the address of a function to call when completing a word would normally display the list of possible matches. This function is called instead of actually doing the display. It takes three arguments: (char **matches, int num_matches, int max_length) where MATCHES is the array of strings that matched, NUM_MATCHES is the number of strings in that array, and MAX_LENGTH is the length of the longest string in that array. */ rl_compdisp_func_t *rl_completion_display_matches_hook = (rl_compdisp_func_t *)NULL; #if defined (VISIBLE_STATS) # if !defined (X_OK) # define X_OK 1 # endif static int stat_char PARAMS((char *)); #endif static int path_isdir PARAMS((const char *)); static char *rl_quote_filename PARAMS((char *, int, char *)); static void set_completion_defaults PARAMS((int)); static int get_y_or_n PARAMS((int)); static int _rl_internal_pager PARAMS((int)); static char *printable_part PARAMS((char *)); static int fnwidth PARAMS((const char *)); static int fnprint PARAMS((const char *, int)); static int print_filename PARAMS((char *, char *, int)); static char **gen_completion_matches PARAMS((char *, int, int, rl_compentry_func_t *, int, int)); static char **remove_duplicate_matches PARAMS((char **)); static void insert_match PARAMS((char *, int, int, char *)); static int append_to_match PARAMS((char *, int, int, int)); static void insert_all_matches PARAMS((char **, int, char *)); static void display_matches PARAMS((char **)); static int compute_lcd_of_matches PARAMS((char **, int, const char *)); static int postprocess_matches PARAMS((char ***, int)); static char *make_quoted_replacement PARAMS((char *, int, char *)); /* **************************************************************** */ /* */ /* Completion matching, from readline's point of view. */ /* */ /* **************************************************************** */ /* Variables known only to the readline library. */ /* If non-zero, non-unique completions always show the list of matches. */ int _rl_complete_show_all = 0; /* If non-zero, non-unique completions show the list of matches, unless it is not possible to do partial completion and modify the line. */ int _rl_complete_show_unmodified = 0; /* If non-zero, completed directory names have a slash appended. */ int _rl_complete_mark_directories = 1; /* If non-zero, the symlinked directory completion behavior introduced in readline-4.2a is disabled, and symlinks that point to directories have a slash appended (subject to the value of _rl_complete_mark_directories). This is user-settable via the mark-symlinked-directories variable. */ int _rl_complete_mark_symlink_dirs = 0; /* If non-zero, completions are printed horizontally in alphabetical order, like `ls -x'. */ int _rl_print_completions_horizontally; /* Non-zero means that case is not significant in filename completion. */ #if defined (__MSDOS__) && !defined (__DJGPP__) int _rl_completion_case_fold = 1; #else int _rl_completion_case_fold; #endif /* If non-zero, don't match hidden files (filenames beginning with a `.' on Unix) when doing filename completion. */ int _rl_match_hidden_files = 1; /* Length in characters of a common prefix replaced with an ellipsis (`...') when displaying completion matches. Matches whose printable portion has more than this number of displaying characters in common will have the common display prefix replaced with an ellipsis. */ int _rl_completion_prefix_display_length = 0; /* Global variables available to applications using readline. */ #if defined (VISIBLE_STATS) /* Non-zero means add an additional character to each filename displayed during listing completion iff rl_filename_completion_desired which helps to indicate the type of file being listed. */ int rl_visible_stats = 0; #endif /* VISIBLE_STATS */ /* If non-zero, when completing in the middle of a word, don't insert characters from the match that match characters following point in the word. This means, for instance, completing when the cursor is after the `e' in `Makefile' won't result in `Makefilefile'. */ int _rl_skip_completed_text = 0; /* If non-zero, then this is the address of a function to call when completing on a directory name. The function is called with the address of a string (the current directory name) as an arg. */ rl_icppfunc_t *rl_directory_completion_hook = (rl_icppfunc_t *)NULL; rl_icppfunc_t *rl_directory_rewrite_hook = (rl_icppfunc_t *)NULL; /* If non-zero, this is the address of a function to call when reading directory entries from the filesystem for completion and comparing them to the partial word to be completed. The function should either return its first argument (if no conversion takes place) or newly-allocated memory. This can, for instance, convert filenames between character sets for comparison against what's typed at the keyboard. The returned value is what is added to the list of matches. The second argument is the length of the filename to be converted. */ rl_dequote_func_t *rl_filename_rewrite_hook = (rl_dequote_func_t *)NULL; /* Non-zero means readline completion functions perform tilde expansion. */ int rl_complete_with_tilde_expansion = 0; /* Pointer to the generator function for completion_matches (). NULL means to use rl_filename_completion_function (), the default filename completer. */ rl_compentry_func_t *rl_completion_entry_function = (rl_compentry_func_t *)NULL; /* Pointer to generator function for rl_menu_complete (). NULL means to use *rl_completion_entry_function (see above). */ rl_compentry_func_t *rl_menu_completion_entry_function = (rl_compentry_func_t *)NULL; /* Pointer to alternative function to create matches. Function is called with TEXT, START, and END. START and END are indices in RL_LINE_BUFFER saying what the boundaries of TEXT are. If this function exists and returns NULL then call the value of rl_completion_entry_function to try to match, otherwise use the array of strings returned. */ rl_completion_func_t *rl_attempted_completion_function = (rl_completion_func_t *)NULL; /* Non-zero means to suppress normal filename completion after the user-specified completion function has been called. */ int rl_attempted_completion_over = 0; /* Set to a character indicating the type of completion being performed by rl_complete_internal, available for use by application completion functions. */ int rl_completion_type = 0; /* Up to this many items will be displayed in response to a possible-completions call. After that, we ask the user if she is sure she wants to see them all. A negative value means don't ask. */ int rl_completion_query_items = 100; int _rl_page_completions = 1; /* The basic list of characters that signal a break between words for the completer routine. The contents of this variable is what breaks words in the shell, i.e. " \t\n\"\\'`@$><=" */ const char *rl_basic_word_break_characters = " \t\n\"\\'`@$><=;|&{("; /* }) */ /* List of basic quoting characters. */ const char *rl_basic_quote_characters = "\"'"; /* The list of characters that signal a break between words for rl_complete_internal. The default list is the contents of rl_basic_word_break_characters. */ /*const*/ char *rl_completer_word_break_characters = (/*const*/ char *)NULL; /* Hook function to allow an application to set the completion word break characters before readline breaks up the line. Allows position-dependent word break characters. */ rl_cpvfunc_t *rl_completion_word_break_hook = (rl_cpvfunc_t *)NULL; /* List of characters which can be used to quote a substring of the line. Completion occurs on the entire substring, and within the substring rl_completer_word_break_characters are treated as any other character, unless they also appear within this list. */ const char *rl_completer_quote_characters = (const char *)NULL; /* List of characters that should be quoted in filenames by the completer. */ const char *rl_filename_quote_characters = (const char *)NULL; /* List of characters that are word break characters, but should be left in TEXT when it is passed to the completion function. The shell uses this to help determine what kind of completing to do. */ const char *rl_special_prefixes = (const char *)NULL; /* If non-zero, then disallow duplicates in the matches. */ int rl_ignore_completion_duplicates = 1; /* Non-zero means that the results of the matches are to be treated as filenames. This is ALWAYS zero on entry, and can only be changed within a completion entry finder function. */ int rl_filename_completion_desired = 0; /* Non-zero means that the results of the matches are to be quoted using double quotes (or an application-specific quoting mechanism) if the filename contains any characters in rl_filename_quote_chars. This is ALWAYS non-zero on entry, and can only be changed within a completion entry finder function. */ int rl_filename_quoting_desired = 1; /* This function, if defined, is called by the completer when real filename completion is done, after all the matching names have been generated. It is passed a (char**) known as matches in the code below. It consists of a NULL-terminated array of pointers to potential matching strings. The 1st element (matches[0]) is the maximal substring that is common to all matches. This function can re-arrange the list of matches as required, but all elements of the array must be free()'d if they are deleted. The main intent of this function is to implement FIGNORE a la SunOS csh. */ rl_compignore_func_t *rl_ignore_some_completions_function = (rl_compignore_func_t *)NULL; /* Set to a function to quote a filename in an application-specific fashion. Called with the text to quote, the type of match found (single or multiple) and a pointer to the quoting character to be used, which the function can reset if desired. */ rl_quote_func_t *rl_filename_quoting_function = rl_quote_filename; /* Function to call to remove quoting characters from a filename. Called before completion is attempted, so the embedded quotes do not interfere with matching names in the file system. Readline doesn't do anything with this; it's set only by applications. */ rl_dequote_func_t *rl_filename_dequoting_function = (rl_dequote_func_t *)NULL; /* Function to call to decide whether or not a word break character is quoted. If a character is quoted, it does not break words for the completer. */ rl_linebuf_func_t *rl_char_is_quoted_p = (rl_linebuf_func_t *)NULL; /* If non-zero, the completion functions don't append anything except a possible closing quote. This is set to 0 by rl_complete_internal and may be changed by an application-specific completion function. */ int rl_completion_suppress_append = 0; /* Character appended to completed words when at the end of the line. The default is a space. */ int rl_completion_append_character = ' '; /* If non-zero, the completion functions don't append any closing quote. This is set to 0 by rl_complete_internal and may be changed by an application-specific completion function. */ int rl_completion_suppress_quote = 0; /* Set to any quote character readline thinks it finds before any application completion function is called. */ int rl_completion_quote_character; /* Set to a non-zero value if readline found quoting anywhere in the word to be completed; set before any application completion function is called. */ int rl_completion_found_quote; /* If non-zero, a slash will be appended to completed filenames that are symbolic links to directory names, subject to the value of the mark-directories variable (which is user-settable). This exists so that application completion functions can override the user's preference (set via the mark-symlinked-directories variable) if appropriate. It's set to the value of _rl_complete_mark_symlink_dirs in rl_complete_internal before any application-specific completion function is called, so without that function doing anything, the user's preferences are honored. */ int rl_completion_mark_symlink_dirs; /* If non-zero, inhibit completion (temporarily). */ int rl_inhibit_completion; /* Set to the last key used to invoke one of the completion functions */ int rl_completion_invoking_key; /* If non-zero, sort the completion matches. On by default. */ int rl_sort_completion_matches = 1; /* Variables local to this file. */ /* Local variable states what happened during the last completion attempt. */ static int completion_changed_buffer; /* The result of the query to the user about displaying completion matches */ static int completion_y_or_n; /*************************************/ /* */ /* Bindable completion functions */ /* */ /*************************************/ /* Complete the word at or before point. You have supplied the function that does the initial simple matching selection algorithm (see rl_completion_matches ()). The default is to do filename completion. */ int rl_complete (ignore, invoking_key) int ignore, invoking_key; { rl_completion_invoking_key = invoking_key; if (rl_inhibit_completion) return (_rl_insert_char (ignore, invoking_key)); else if (rl_last_func == rl_complete && !completion_changed_buffer) return (rl_complete_internal ('?')); else if (_rl_complete_show_all) return (rl_complete_internal ('!')); else if (_rl_complete_show_unmodified) return (rl_complete_internal ('@')); else return (rl_complete_internal (TAB)); } /* List the possible completions. See description of rl_complete (). */ int rl_possible_completions (ignore, invoking_key) int ignore, invoking_key; { rl_completion_invoking_key = invoking_key; return (rl_complete_internal ('?')); } int rl_insert_completions (ignore, invoking_key) int ignore, invoking_key; { rl_completion_invoking_key = invoking_key; return (rl_complete_internal ('*')); } /* Return the correct value to pass to rl_complete_internal performing the same tests as rl_complete. This allows consecutive calls to an application's completion function to list possible completions and for an application-specific completion function to honor the show-all-if-ambiguous readline variable. */ int rl_completion_mode (cfunc) rl_command_func_t *cfunc; { if (rl_last_func == cfunc && !completion_changed_buffer) return '?'; else if (_rl_complete_show_all) return '!'; else if (_rl_complete_show_unmodified) return '@'; else return TAB; } /************************************/ /* */ /* Completion utility functions */ /* */ /************************************/ /* Reset readline state on a signal or other event. */ void _rl_reset_completion_state () { rl_completion_found_quote = 0; rl_completion_quote_character = 0; } /* Set default values for readline word completion. These are the variables that application completion functions can change or inspect. */ static void set_completion_defaults (what_to_do) int what_to_do; { /* Only the completion entry function can change these. */ rl_filename_completion_desired = 0; rl_filename_quoting_desired = 1; rl_completion_type = what_to_do; rl_completion_suppress_append = rl_completion_suppress_quote = 0; rl_completion_append_character = ' '; /* The completion entry function may optionally change this. */ rl_completion_mark_symlink_dirs = _rl_complete_mark_symlink_dirs; } /* The user must press "y" or "n". Non-zero return means "y" pressed. */ static int get_y_or_n (for_pager) int for_pager; { int c; for (;;) { RL_SETSTATE(RL_STATE_MOREINPUT); c = rl_read_key (); RL_UNSETSTATE(RL_STATE_MOREINPUT); if (c == 'y' || c == 'Y' || c == ' ') return (1); if (c == 'n' || c == 'N' || c == RUBOUT) return (0); if (c == ABORT_CHAR || c < 0) _rl_abort_internal (); if (for_pager && (c == NEWLINE || c == RETURN)) return (2); if (for_pager && (c == 'q' || c == 'Q')) return (0); rl_ding (); } } static int _rl_internal_pager (lines) int lines; { int i; fprintf (rl_outstream, "--More--"); fflush (rl_outstream); i = get_y_or_n (1); _rl_erase_entire_line (); if (i == 0) return -1; else if (i == 2) return (lines - 1); else return 0; } static int path_isdir (filename) const char *filename; { struct stat finfo; return (stat (filename, &finfo) == 0 && S_ISDIR (finfo.st_mode)); } #if defined (VISIBLE_STATS) /* Return the character which best describes FILENAME. `@' for symbolic links `/' for directories `*' for executables `=' for sockets `|' for FIFOs `%' for character special devices `#' for block special devices */ static int stat_char (filename) char *filename; { struct stat finfo; int character, r; /* Short-circuit a //server on cygwin, since that will always behave as a directory. */ #if __CYGWIN__ if (filename[0] == '/' && filename[1] == '/' && strchr (filename+2, '/') == 0) return '/'; #endif #if defined (HAVE_LSTAT) && defined (S_ISLNK) r = lstat (filename, &finfo); #else r = stat (filename, &finfo); #endif if (r == -1) return (0); character = 0; if (S_ISDIR (finfo.st_mode)) character = '/'; #if defined (S_ISCHR) else if (S_ISCHR (finfo.st_mode)) character = '%'; #endif /* S_ISCHR */ #if defined (S_ISBLK) else if (S_ISBLK (finfo.st_mode)) character = '#'; #endif /* S_ISBLK */ #if defined (S_ISLNK) else if (S_ISLNK (finfo.st_mode)) character = '@'; #endif /* S_ISLNK */ #if defined (S_ISSOCK) else if (S_ISSOCK (finfo.st_mode)) character = '='; #endif /* S_ISSOCK */ #if defined (S_ISFIFO) else if (S_ISFIFO (finfo.st_mode)) character = '|'; #endif else if (S_ISREG (finfo.st_mode)) { if (access (filename, X_OK) == 0) character = '*'; } return (character); } #endif /* VISIBLE_STATS */ /* Return the portion of PATHNAME that should be output when listing possible completions. If we are hacking filename completion, we are only interested in the basename, the portion following the final slash. Otherwise, we return what we were passed. Since printing empty strings is not very informative, if we're doing filename completion, and the basename is the empty string, we look for the previous slash and return the portion following that. If there's no previous slash, we just return what we were passed. */ static char * printable_part (pathname) char *pathname; { char *temp, *x; if (rl_filename_completion_desired == 0) /* don't need to do anything */ return (pathname); temp = strrchr (pathname, '/'); #if defined (__MSDOS__) if (temp == 0 && ISALPHA ((unsigned char)pathname[0]) && pathname[1] == ':') temp = pathname + 1; #endif if (temp == 0 || *temp == '\0') return (pathname); /* If the basename is NULL, we might have a pathname like '/usr/src/'. Look for a previous slash and, if one is found, return the portion following that slash. If there's no previous slash, just return the pathname we were passed. */ else if (temp[1] == '\0') { for (x = temp - 1; x > pathname; x--) if (*x == '/') break; return ((*x == '/') ? x + 1 : pathname); } else return ++temp; } /* Compute width of STRING when displayed on screen by print_filename */ static int fnwidth (string) const char *string; { int width, pos; #if defined (HANDLE_MULTIBYTE) mbstate_t ps; int left, w; size_t clen; wchar_t wc; left = strlen (string) + 1; memset (&ps, 0, sizeof (mbstate_t)); #endif width = pos = 0; while (string[pos]) { if (CTRL_CHAR (string[pos]) || string[pos] == RUBOUT) { width += 2; pos++; } else { #if defined (HANDLE_MULTIBYTE) clen = mbrtowc (&wc, string + pos, left - pos, &ps); if (MB_INVALIDCH (clen)) { width++; pos++; memset (&ps, 0, sizeof (mbstate_t)); } else if (MB_NULLWCH (clen)) break; else { pos += clen; w = wcwidth (wc); width += (w >= 0) ? w : 1; } #else width++; pos++; #endif } } return width; } #define ELLIPSIS_LEN 3 static int fnprint (to_print, prefix_bytes) const char *to_print; int prefix_bytes; { int printed_len, w; const char *s; #if defined (HANDLE_MULTIBYTE) mbstate_t ps; const char *end; size_t tlen; int width; wchar_t wc; end = to_print + strlen (to_print) + 1; memset (&ps, 0, sizeof (mbstate_t)); #endif printed_len = 0; /* Don't print only the ellipsis if the common prefix is one of the possible completions */ if (to_print[prefix_bytes] == '\0') prefix_bytes = 0; if (prefix_bytes) { char ellipsis; ellipsis = (to_print[prefix_bytes] == '.') ? '_' : '.'; for (w = 0; w < ELLIPSIS_LEN; w++) putc (ellipsis, rl_outstream); printed_len = ELLIPSIS_LEN; } s = to_print + prefix_bytes; while (*s) { if (CTRL_CHAR (*s)) { putc ('^', rl_outstream); putc (UNCTRL (*s), rl_outstream); printed_len += 2; s++; #if defined (HANDLE_MULTIBYTE) memset (&ps, 0, sizeof (mbstate_t)); #endif } else if (*s == RUBOUT) { putc ('^', rl_outstream); putc ('?', rl_outstream); printed_len += 2; s++; #if defined (HANDLE_MULTIBYTE) memset (&ps, 0, sizeof (mbstate_t)); #endif } else { #if defined (HANDLE_MULTIBYTE) tlen = mbrtowc (&wc, s, end - s, &ps); if (MB_INVALIDCH (tlen)) { tlen = 1; width = 1; memset (&ps, 0, sizeof (mbstate_t)); } else if (MB_NULLWCH (tlen)) break; else { w = wcwidth (wc); width = (w >= 0) ? w : 1; } fwrite (s, 1, tlen, rl_outstream); s += tlen; printed_len += width; #else putc (*s, rl_outstream); s++; printed_len++; #endif } } return printed_len; } /* Output TO_PRINT to rl_outstream. If VISIBLE_STATS is defined and we are using it, check for and output a single character for `special' filenames. Return the number of characters we output. */ static int print_filename (to_print, full_pathname, prefix_bytes) char *to_print, *full_pathname; int prefix_bytes; { int printed_len, extension_char, slen, tlen; char *s, c, *new_full_pathname, *dn; extension_char = 0; printed_len = fnprint (to_print, prefix_bytes); #if defined (VISIBLE_STATS) if (rl_filename_completion_desired && (rl_visible_stats || _rl_complete_mark_directories)) #else if (rl_filename_completion_desired && _rl_complete_mark_directories) #endif { /* If to_print != full_pathname, to_print is the basename of the path passed. In this case, we try to expand the directory name before checking for the stat character. */ if (to_print != full_pathname) { /* Terminate the directory name. */ c = to_print[-1]; to_print[-1] = '\0'; /* If setting the last slash in full_pathname to a NUL results in full_pathname being the empty string, we are trying to complete files in the root directory. If we pass a null string to the bash directory completion hook, for example, it will expand it to the current directory. We just want the `/'. */ if (full_pathname == 0 || *full_pathname == 0) dn = "/"; else if (full_pathname[0] != '/') dn = full_pathname; else if (full_pathname[1] == 0) dn = "//"; /* restore trailing slash to `//' */ else if (full_pathname[1] == '/' && full_pathname[2] == 0) dn = "/"; /* don't turn /// into // */ else dn = full_pathname; s = tilde_expand (dn); if (rl_directory_completion_hook) (*rl_directory_completion_hook) (&s); slen = strlen (s); tlen = strlen (to_print); new_full_pathname = (char *)xmalloc (slen + tlen + 2); strcpy (new_full_pathname, s); if (s[slen - 1] == '/') slen--; else new_full_pathname[slen] = '/'; new_full_pathname[slen] = '/'; strcpy (new_full_pathname + slen + 1, to_print); #if defined (VISIBLE_STATS) if (rl_visible_stats) extension_char = stat_char (new_full_pathname); else #endif if (path_isdir (new_full_pathname)) extension_char = '/'; free (new_full_pathname); to_print[-1] = c; } else { s = tilde_expand (full_pathname); #if defined (VISIBLE_STATS) if (rl_visible_stats) extension_char = stat_char (s); else #endif if (path_isdir (s)) extension_char = '/'; } free (s); if (extension_char) { putc (extension_char, rl_outstream); printed_len++; } } return printed_len; } static char * rl_quote_filename (s, rtype, qcp) char *s; int rtype; char *qcp; { char *r; r = (char *)xmalloc (strlen (s) + 2); *r = *rl_completer_quote_characters; strcpy (r + 1, s); if (qcp) *qcp = *rl_completer_quote_characters; return r; } /* Find the bounds of the current word for completion purposes, and leave rl_point set to the end of the word. This function skips quoted substrings (characters between matched pairs of characters in rl_completer_quote_characters). First we try to find an unclosed quoted substring on which to do matching. If one is not found, we use the word break characters to find the boundaries of the current word. We call an application-specific function to decide whether or not a particular word break character is quoted; if that function returns a non-zero result, the character does not break a word. This function returns the opening quote character if we found an unclosed quoted substring, '\0' otherwise. FP, if non-null, is set to a value saying which (shell-like) quote characters we found (single quote, double quote, or backslash) anywhere in the string. DP, if non-null, is set to the value of the delimiter character that caused a word break. */ char _rl_find_completion_word (fp, dp) int *fp, *dp; { int scan, end, found_quote, delimiter, pass_next, isbrk; char quote_char, *brkchars; end = rl_point; found_quote = delimiter = 0; quote_char = '\0'; brkchars = 0; if (rl_completion_word_break_hook) brkchars = (*rl_completion_word_break_hook) (); if (brkchars == 0) brkchars = rl_completer_word_break_characters; if (rl_completer_quote_characters) { /* We have a list of characters which can be used in pairs to quote substrings for the completer. Try to find the start of an unclosed quoted substring. */ /* FOUND_QUOTE is set so we know what kind of quotes we found. */ for (scan = pass_next = 0; scan < end; scan = MB_NEXTCHAR (rl_line_buffer, scan, 1, MB_FIND_ANY)) { if (pass_next) { pass_next = 0; continue; } /* Shell-like semantics for single quotes -- don't allow backslash to quote anything in single quotes, especially not the closing quote. If you don't like this, take out the check on the value of quote_char. */ if (quote_char != '\'' && rl_line_buffer[scan] == '\\') { pass_next = 1; found_quote |= RL_QF_BACKSLASH; continue; } if (quote_char != '\0') { /* Ignore everything until the matching close quote char. */ if (rl_line_buffer[scan] == quote_char) { /* Found matching close. Abandon this substring. */ quote_char = '\0'; rl_point = end; } } else if (strchr (rl_completer_quote_characters, rl_line_buffer[scan])) { /* Found start of a quoted substring. */ quote_char = rl_line_buffer[scan]; rl_point = scan + 1; /* Shell-like quoting conventions. */ if (quote_char == '\'') found_quote |= RL_QF_SINGLE_QUOTE; else if (quote_char == '"') found_quote |= RL_QF_DOUBLE_QUOTE; else found_quote |= RL_QF_OTHER_QUOTE; } } } if (rl_point == end && quote_char == '\0') { /* We didn't find an unclosed quoted substring upon which to do completion, so use the word break characters to find the substring on which to complete. */ while (rl_point = MB_PREVCHAR (rl_line_buffer, rl_point, MB_FIND_ANY)) { scan = rl_line_buffer[rl_point]; if (strchr (brkchars, scan) == 0) continue; /* Call the application-specific function to tell us whether this word break character is quoted and should be skipped. */ if (rl_char_is_quoted_p && found_quote && (*rl_char_is_quoted_p) (rl_line_buffer, rl_point)) continue; /* Convoluted code, but it avoids an n^2 algorithm with calls to char_is_quoted. */ break; } } /* If we are at an unquoted word break, then advance past it. */ scan = rl_line_buffer[rl_point]; /* If there is an application-specific function to say whether or not a character is quoted and we found a quote character, let that function decide whether or not a character is a word break, even if it is found in rl_completer_word_break_characters. Don't bother if we're at the end of the line, though. */ if (scan) { if (rl_char_is_quoted_p) isbrk = (found_quote == 0 || (*rl_char_is_quoted_p) (rl_line_buffer, rl_point) == 0) && strchr (brkchars, scan) != 0; else isbrk = strchr (brkchars, scan) != 0; if (isbrk) { /* If the character that caused the word break was a quoting character, then remember it as the delimiter. */ if (rl_basic_quote_characters && strchr (rl_basic_quote_characters, scan) && (end - rl_point) > 1) delimiter = scan; /* If the character isn't needed to determine something special about what kind of completion to perform, then advance past it. */ if (rl_special_prefixes == 0 || strchr (rl_special_prefixes, scan) == 0) rl_point++; } } if (fp) *fp = found_quote; if (dp) *dp = delimiter; return (quote_char); } static char ** gen_completion_matches (text, start, end, our_func, found_quote, quote_char) char *text; int start, end; rl_compentry_func_t *our_func; int found_quote, quote_char; { char **matches; rl_completion_found_quote = found_quote; rl_completion_quote_character = quote_char; /* If the user wants to TRY to complete, but then wants to give up and use the default completion function, they set the variable rl_attempted_completion_function. */ if (rl_attempted_completion_function) { _rl_interrupt_immediately++; matches = (*rl_attempted_completion_function) (text, start, end); if (_rl_interrupt_immediately > 0) _rl_interrupt_immediately--; if (matches || rl_attempted_completion_over) { rl_attempted_completion_over = 0; return (matches); } } /* XXX -- filename dequoting moved into rl_filename_completion_function */ matches = rl_completion_matches (text, our_func); return matches; } /* Filter out duplicates in MATCHES. This frees up the strings in MATCHES. */ static char ** remove_duplicate_matches (matches) char **matches; { char *lowest_common; int i, j, newlen; char dead_slot; char **temp_array; /* Sort the items. */ for (i = 0; matches[i]; i++) ; /* Sort the array without matches[0], since we need it to stay in place no matter what. */ if (i && rl_sort_completion_matches) qsort (matches+1, i-1, sizeof (char *), (QSFUNC *)_rl_qsort_string_compare); /* Remember the lowest common denominator for it may be unique. */ lowest_common = savestring (matches[0]); for (i = newlen = 0; matches[i + 1]; i++) { if (strcmp (matches[i], matches[i + 1]) == 0) { free (matches[i]); matches[i] = (char *)&dead_slot; } else newlen++; } /* We have marked all the dead slots with (char *)&dead_slot. Copy all the non-dead entries into a new array. */ temp_array = (char **)xmalloc ((3 + newlen) * sizeof (char *)); for (i = j = 1; matches[i]; i++) { if (matches[i] != (char *)&dead_slot) temp_array[j++] = matches[i]; } temp_array[j] = (char *)NULL; if (matches[0] != (char *)&dead_slot) free (matches[0]); /* Place the lowest common denominator back in [0]. */ temp_array[0] = lowest_common; /* If there is one string left, and it is identical to the lowest common denominator, then the LCD is the string to insert. */ if (j == 2 && strcmp (temp_array[0], temp_array[1]) == 0) { free (temp_array[1]); temp_array[1] = (char *)NULL; } return (temp_array); } /* Find the common prefix of the list of matches, and put it into matches[0]. */ static int compute_lcd_of_matches (match_list, matches, text) char **match_list; int matches; const char *text; { register int i, c1, c2, si; int low; /* Count of max-matched characters. */ char *dtext; /* dequoted TEXT, if needed */ #if defined (HANDLE_MULTIBYTE) int v; mbstate_t ps1, ps2; wchar_t wc1, wc2; #endif /* If only one match, just use that. Otherwise, compare each member of the list with the next, finding out where they stop matching. */ if (matches == 1) { match_list[0] = match_list[1]; match_list[1] = (char *)NULL; return 1; } for (i = 1, low = 100000; i < matches; i++) { #if defined (HANDLE_MULTIBYTE) if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) { memset (&ps1, 0, sizeof (mbstate_t)); memset (&ps2, 0, sizeof (mbstate_t)); } #endif if (_rl_completion_case_fold) { for (si = 0; (c1 = _rl_to_lower(match_list[i][si])) && (c2 = _rl_to_lower(match_list[i + 1][si])); si++) #if defined (HANDLE_MULTIBYTE) if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) { v = mbrtowc (&wc1, match_list[i]+si, strlen (match_list[i]+si), &ps1); mbrtowc (&wc2, match_list[i+1]+si, strlen (match_list[i+1]+si), &ps2); wc1 = towlower (wc1); wc2 = towlower (wc2); if (wc1 != wc2) break; else if (v > 1) si += v - 1; } else #endif if (c1 != c2) break; } else { for (si = 0; (c1 = match_list[i][si]) && (c2 = match_list[i + 1][si]); si++) #if defined (HANDLE_MULTIBYTE) if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) { mbstate_t ps_back; ps_back = ps1; if (!_rl_compare_chars (match_list[i], si, &ps1, match_list[i+1], si, &ps2)) break; else if ((v = _rl_get_char_len (&match_list[i][si], &ps_back)) > 1) si += v - 1; } else #endif if (c1 != c2) break; } if (low > si) low = si; } /* If there were multiple matches, but none matched up to even the first character, and the user typed something, use that as the value of matches[0]. */ if (low == 0 && text && *text) { match_list[0] = (char *)xmalloc (strlen (text) + 1); strcpy (match_list[0], text); } else { match_list[0] = (char *)xmalloc (low + 1); /* XXX - this might need changes in the presence of multibyte chars */ /* If we are ignoring case, try to preserve the case of the string the user typed in the face of multiple matches differing in case. */ if (_rl_completion_case_fold) { /* We're making an assumption here: IF we're completing filenames AND the application has defined a filename dequoting function AND we found a quote character AND the application has requested filename quoting THEN we assume that TEXT was dequoted before checking against the file system and needs to be dequoted here before we check against the list of matches FI */ dtext = (char *)NULL; if (rl_filename_completion_desired && rl_filename_dequoting_function && rl_completion_found_quote && rl_filename_quoting_desired) { dtext = (*rl_filename_dequoting_function) ((char *)text, rl_completion_quote_character); text = dtext; } /* sort the list to get consistent answers. */ qsort (match_list+1, matches, sizeof(char *), (QSFUNC *)_rl_qsort_string_compare); si = strlen (text); if (si <= low) { for (i = 1; i <= matches; i++) if (strncmp (match_list[i], text, si) == 0) { strncpy (match_list[0], match_list[i], low); break; } /* no casematch, use first entry */ if (i > matches) strncpy (match_list[0], match_list[1], low); } else /* otherwise, just use the text the user typed. */ strncpy (match_list[0], text, low); FREE (dtext); } else strncpy (match_list[0], match_list[1], low); match_list[0][low] = '\0'; } return matches; } static int postprocess_matches (matchesp, matching_filenames) char ***matchesp; int matching_filenames; { char *t, **matches, **temp_matches; int nmatch, i; matches = *matchesp; if (matches == 0) return 0; /* It seems to me that in all the cases we handle we would like to ignore duplicate possiblilities. Scan for the text to insert being identical to the other completions. */ if (rl_ignore_completion_duplicates) { temp_matches = remove_duplicate_matches (matches); free (matches); matches = temp_matches; } /* If we are matching filenames, then here is our chance to do clever processing by re-examining the list. Call the ignore function with the array as a parameter. It can munge the array, deleting matches as it desires. */ if (rl_ignore_some_completions_function && matching_filenames) { for (nmatch = 1; matches[nmatch]; nmatch++) ; (void)(*rl_ignore_some_completions_function) (matches); if (matches == 0 || matches[0] == 0) { FREE (matches); *matchesp = (char **)0; return 0; } else { /* If we removed some matches, recompute the common prefix. */ for (i = 1; matches[i]; i++) ; if (i > 1 && i < nmatch) { t = matches[0]; compute_lcd_of_matches (matches, i - 1, t); FREE (t); } } } *matchesp = matches; return (1); } /* A convenience function for displaying a list of strings in columnar format on readline's output stream. MATCHES is the list of strings, in argv format, LEN is the number of strings in MATCHES, and MAX is the length of the longest string in MATCHES. */ void rl_display_match_list (matches, len, max) char **matches; int len, max; { int count, limit, printed_len, lines; int i, j, k, l, common_length, sind; char *temp, *t; /* Find the length of the prefix common to all items: length as displayed characters (common_length) and as a byte index into the matches (sind) */ common_length = sind = 0; if (_rl_completion_prefix_display_length > 0) { t = printable_part (matches[0]); temp = strrchr (t, '/'); common_length = temp ? fnwidth (temp) : fnwidth (t); sind = temp ? strlen (temp) : strlen (t); if (common_length > _rl_completion_prefix_display_length && common_length > ELLIPSIS_LEN) max -= common_length - ELLIPSIS_LEN; else common_length = sind = 0; } /* How many items of MAX length can we fit in the screen window? */ max += 2; limit = _rl_screenwidth / max; if (limit != 1 && (limit * max == _rl_screenwidth)) limit--; /* Avoid a possible floating exception. If max > _rl_screenwidth, limit will be 0 and a divide-by-zero fault will result. */ if (limit == 0) limit = 1; /* How many iterations of the printing loop? */ count = (len + (limit - 1)) / limit; /* Watch out for special case. If LEN is less than LIMIT, then just do the inner printing loop. 0 < len <= limit implies count = 1. */ /* Sort the items if they are not already sorted. */ if (rl_ignore_completion_duplicates == 0 && rl_sort_completion_matches) qsort (matches + 1, len, sizeof (char *), (QSFUNC *)_rl_qsort_string_compare); rl_crlf (); lines = 0; if (_rl_print_completions_horizontally == 0) { /* Print the sorted items, up-and-down alphabetically, like ls. */ for (i = 1; i <= count; i++) { for (j = 0, l = i; j < limit; j++) { if (l > len || matches[l] == 0) break; else { temp = printable_part (matches[l]); printed_len = print_filename (temp, matches[l], sind); if (j + 1 < limit) for (k = 0; k < max - printed_len; k++) putc (' ', rl_outstream); } l += count; } rl_crlf (); lines++; if (_rl_page_completions && lines >= (_rl_screenheight - 1) && i < count) { lines = _rl_internal_pager (lines); if (lines < 0) return; } } } else { /* Print the sorted items, across alphabetically, like ls -x. */ for (i = 1; matches[i]; i++) { temp = printable_part (matches[i]); printed_len = print_filename (temp, matches[i], sind); /* Have we reached the end of this line? */ if (matches[i+1]) { if (i && (limit > 1) && (i % limit) == 0) { rl_crlf (); lines++; if (_rl_page_completions && lines >= _rl_screenheight - 1) { lines = _rl_internal_pager (lines); if (lines < 0) return; } } else for (k = 0; k < max - printed_len; k++) putc (' ', rl_outstream); } } rl_crlf (); } } /* Display MATCHES, a list of matching filenames in argv format. This handles the simple case -- a single match -- first. If there is more than one match, we compute the number of strings in the list and the length of the longest string, which will be needed by the display function. If the application wants to handle displaying the list of matches itself, it sets RL_COMPLETION_DISPLAY_MATCHES_HOOK to the address of a function, and we just call it. If we're handling the display ourselves, we just call rl_display_match_list. We also check that the list of matches doesn't exceed the user-settable threshold, and ask the user if he wants to see the list if there are more matches than RL_COMPLETION_QUERY_ITEMS. */ static void display_matches (matches) char **matches; { int len, max, i; char *temp; /* Move to the last visible line of a possibly-multiple-line command. */ _rl_move_vert (_rl_vis_botlin); /* Handle simple case first. What if there is only one answer? */ if (matches[1] == 0) { temp = printable_part (matches[0]); rl_crlf (); print_filename (temp, matches[0], 0); rl_crlf (); rl_forced_update_display (); rl_display_fixed = 1; return; } /* There is more than one answer. Find out how many there are, and find the maximum printed length of a single entry. */ for (max = 0, i = 1; matches[i]; i++) { temp = printable_part (matches[i]); len = fnwidth (temp); if (len > max) max = len; } len = i - 1; /* If the caller has defined a display hook, then call that now. */ if (rl_completion_display_matches_hook) { (*rl_completion_display_matches_hook) (matches, len, max); return; } /* If there are many items, then ask the user if she really wants to see them all. */ if (rl_completion_query_items > 0 && len >= rl_completion_query_items) { rl_crlf (); fprintf (rl_outstream, "Display all %d possibilities? (y or n)", len); fflush (rl_outstream); if ((completion_y_or_n = get_y_or_n (0)) == 0) { rl_crlf (); rl_forced_update_display (); rl_display_fixed = 1; return; } } rl_display_match_list (matches, len, max); rl_forced_update_display (); rl_display_fixed = 1; } static char * make_quoted_replacement (match, mtype, qc) char *match; int mtype; char *qc; /* Pointer to quoting character, if any */ { int should_quote, do_replace; char *replacement; /* If we are doing completion on quoted substrings, and any matches contain any of the completer_word_break_characters, then auto- matically prepend the substring with a quote character (just pick the first one from the list of such) if it does not already begin with a quote string. FIXME: Need to remove any such automatically inserted quote character when it no longer is necessary, such as if we change the string we are completing on and the new set of matches don't require a quoted substring. */ replacement = match; should_quote = match && rl_completer_quote_characters && rl_filename_completion_desired && rl_filename_quoting_desired; if (should_quote) should_quote = should_quote && (!qc || !*qc || (rl_completer_quote_characters && strchr (rl_completer_quote_characters, *qc))); if (should_quote) { /* If there is a single match, see if we need to quote it. This also checks whether the common prefix of several matches needs to be quoted. */ should_quote = rl_filename_quote_characters ? (_rl_strpbrk (match, rl_filename_quote_characters) != 0) : 0; do_replace = should_quote ? mtype : NO_MATCH; /* Quote the replacement, since we found an embedded word break character in a potential match. */ if (do_replace != NO_MATCH && rl_filename_quoting_function) replacement = (*rl_filename_quoting_function) (match, do_replace, qc); } return (replacement); } static void insert_match (match, start, mtype, qc) char *match; int start, mtype; char *qc; { char *replacement, *r; char oqc; int end, rlen; oqc = qc ? *qc : '\0'; replacement = make_quoted_replacement (match, mtype, qc); /* Now insert the match. */ if (replacement) { rlen = strlen (replacement); /* Don't double an opening quote character. */ if (qc && *qc && start && rl_line_buffer[start - 1] == *qc && replacement[0] == *qc) start--; /* If make_quoted_replacement changed the quoting character, remove the opening quote and insert the (fully-quoted) replacement. */ else if (qc && (*qc != oqc) && start && rl_line_buffer[start - 1] == oqc && replacement[0] != oqc) start--; end = rl_point - 1; /* Don't double a closing quote character */ if (qc && *qc && end && rl_line_buffer[rl_point] == *qc && replacement[rlen - 1] == *qc) end++; if (_rl_skip_completed_text) { r = replacement; while (start < rl_end && *r && rl_line_buffer[start] == *r) { start++; r++; } if (start <= end || *r) _rl_replace_text (r, start, end); rl_point = start + strlen (r); } else _rl_replace_text (replacement, start, end); if (replacement != match) free (replacement); } } /* Append any necessary closing quote and a separator character to the just-inserted match. If the user has specified that directories should be marked by a trailing `/', append one of those instead. The default trailing character is a space. Returns the number of characters appended. If NONTRIVIAL_MATCH is set, we test for a symlink (if the OS has them) and don't add a suffix for a symlink to a directory. A nontrivial match is one that actually adds to the word being completed. The variable rl_completion_mark_symlink_dirs controls this behavior (it's initially set to the what the user has chosen, indicated by the value of _rl_complete_mark_symlink_dirs, but may be modified by an application's completion function). */ static int append_to_match (text, delimiter, quote_char, nontrivial_match) char *text; int delimiter, quote_char, nontrivial_match; { char temp_string[4], *filename; int temp_string_index, s; struct stat finfo; temp_string_index = 0; if (quote_char && rl_point && rl_completion_suppress_quote == 0 && rl_line_buffer[rl_point - 1] != quote_char) temp_string[temp_string_index++] = quote_char; if (delimiter) temp_string[temp_string_index++] = delimiter; else if (rl_completion_suppress_append == 0 && rl_completion_append_character) temp_string[temp_string_index++] = rl_completion_append_character; temp_string[temp_string_index++] = '\0'; if (rl_filename_completion_desired) { filename = tilde_expand (text); s = (nontrivial_match && rl_completion_mark_symlink_dirs == 0) ? LSTAT (filename, &finfo) : stat (filename, &finfo); if (s == 0 && S_ISDIR (finfo.st_mode)) { if (_rl_complete_mark_directories /* && rl_completion_suppress_append == 0 */) { /* This is clumsy. Avoid putting in a double slash if point is at the end of the line and the previous character is a slash. */ if (rl_point && rl_line_buffer[rl_point] == '\0' && rl_line_buffer[rl_point - 1] == '/') ; else if (rl_line_buffer[rl_point] != '/') rl_insert_text ("/"); } } #ifdef S_ISLNK /* Don't add anything if the filename is a symlink and resolves to a directory. */ else if (s == 0 && S_ISLNK (finfo.st_mode) && stat (filename, &finfo) == 0 && S_ISDIR (finfo.st_mode)) ; #endif else { if (rl_point == rl_end && temp_string_index) rl_insert_text (temp_string); } free (filename); } else { if (rl_point == rl_end && temp_string_index) rl_insert_text (temp_string); } return (temp_string_index); } static void insert_all_matches (matches, point, qc) char **matches; int point; char *qc; { int i; char *rp; rl_begin_undo_group (); /* remove any opening quote character; make_quoted_replacement will add it back. */ if (qc && *qc && point && rl_line_buffer[point - 1] == *qc) point--; rl_delete_text (point, rl_point); rl_point = point; if (matches[1]) { for (i = 1; matches[i]; i++) { rp = make_quoted_replacement (matches[i], SINGLE_MATCH, qc); rl_insert_text (rp); rl_insert_text (" "); if (rp != matches[i]) free (rp); } } else { rp = make_quoted_replacement (matches[0], SINGLE_MATCH, qc); rl_insert_text (rp); rl_insert_text (" "); if (rp != matches[0]) free (rp); } rl_end_undo_group (); } void _rl_free_match_list (matches) char **matches; { register int i; if (matches == 0) return; for (i = 0; matches[i]; i++) free (matches[i]); free (matches); } /* Complete the word at or before point. WHAT_TO_DO says what to do with the completion. `?' means list the possible completions. TAB means do standard completion. `*' means insert all of the possible completions. `!' means to do standard completion, and list all possible completions if there is more than one. `@' means to do standard completion, and list all possible completions if there is more than one and partial completion is not possible. */ int rl_complete_internal (what_to_do) int what_to_do; { char **matches; rl_compentry_func_t *our_func; int start, end, delimiter, found_quote, i, nontrivial_lcd; char *text, *saved_line_buffer; char quote_char; RL_SETSTATE(RL_STATE_COMPLETING); set_completion_defaults (what_to_do); saved_line_buffer = rl_line_buffer ? savestring (rl_line_buffer) : (char *)NULL; our_func = rl_completion_entry_function ? rl_completion_entry_function : rl_filename_completion_function; /* We now look backwards for the start of a filename/variable word. */ end = rl_point; found_quote = delimiter = 0; quote_char = '\0'; if (rl_point) /* This (possibly) changes rl_point. If it returns a non-zero char, we know we have an open quote. */ quote_char = _rl_find_completion_word (&found_quote, &delimiter); start = rl_point; rl_point = end; text = rl_copy_text (start, end); matches = gen_completion_matches (text, start, end, our_func, found_quote, quote_char); /* nontrivial_lcd is set if the common prefix adds something to the word being completed. */ nontrivial_lcd = matches && strcmp (text, matches[0]) != 0; free (text); if (matches == 0) { rl_ding (); FREE (saved_line_buffer); completion_changed_buffer = 0; RL_UNSETSTATE(RL_STATE_COMPLETING); _rl_reset_completion_state (); return (0); } /* If we are matching filenames, the attempted completion function will have set rl_filename_completion_desired to a non-zero value. The basic rl_filename_completion_function does this. */ i = rl_filename_completion_desired; if (postprocess_matches (&matches, i) == 0) { rl_ding (); FREE (saved_line_buffer); completion_changed_buffer = 0; RL_UNSETSTATE(RL_STATE_COMPLETING); _rl_reset_completion_state (); return (0); } switch (what_to_do) { case TAB: case '!': case '@': /* Insert the first match with proper quoting. */ if (*matches[0]) insert_match (matches[0], start, matches[1] ? MULT_MATCH : SINGLE_MATCH, "e_char); /* If there are more matches, ring the bell to indicate. If we are in vi mode, Posix.2 says to not ring the bell. If the `show-all-if-ambiguous' variable is set, display all the matches immediately. Otherwise, if this was the only match, and we are hacking files, check the file to see if it was a directory. If so, and the `mark-directories' variable is set, add a '/' to the name. If not, and we are at the end of the line, then add a space. */ if (matches[1]) { if (what_to_do == '!') { display_matches (matches); break; } else if (what_to_do == '@') { if (nontrivial_lcd == 0) display_matches (matches); break; } else if (rl_editing_mode != vi_mode) rl_ding (); /* There are other matches remaining. */ } else append_to_match (matches[0], delimiter, quote_char, nontrivial_lcd); break; case '*': insert_all_matches (matches, start, "e_char); break; case '?': display_matches (matches); break; default: _rl_ttymsg ("bad value %d for what_to_do in rl_complete", what_to_do); rl_ding (); FREE (saved_line_buffer); RL_UNSETSTATE(RL_STATE_COMPLETING); _rl_reset_completion_state (); return 1; } _rl_free_match_list (matches); /* Check to see if the line has changed through all of this manipulation. */ if (saved_line_buffer) { completion_changed_buffer = strcmp (rl_line_buffer, saved_line_buffer) != 0; free (saved_line_buffer); } RL_UNSETSTATE(RL_STATE_COMPLETING); _rl_reset_completion_state (); return 0; } /***************************************************************/ /* */ /* Application-callable completion match generator functions */ /* */ /***************************************************************/ /* Return an array of (char *) which is a list of completions for TEXT. If there are no completions, return a NULL pointer. The first entry in the returned array is the substitution for TEXT. The remaining entries are the possible completions. The array is terminated with a NULL pointer. ENTRY_FUNCTION is a function of two args, and returns a (char *). The first argument is TEXT. The second is a state argument; it should be zero on the first call, and non-zero on subsequent calls. It returns a NULL pointer to the caller when there are no more matches. */ char ** rl_completion_matches (text, entry_function) const char *text; rl_compentry_func_t *entry_function; { /* Number of slots in match_list. */ int match_list_size; /* The list of matches. */ char **match_list; /* Number of matches actually found. */ int matches; /* Temporary string binder. */ char *string; matches = 0; match_list_size = 10; match_list = (char **)xmalloc ((match_list_size + 1) * sizeof (char *)); match_list[1] = (char *)NULL; _rl_interrupt_immediately++; while (string = (*entry_function) (text, matches)) { if (matches + 1 == match_list_size) match_list = (char **)xrealloc (match_list, ((match_list_size += 10) + 1) * sizeof (char *)); match_list[++matches] = string; match_list[matches + 1] = (char *)NULL; } if (_rl_interrupt_immediately > 0) _rl_interrupt_immediately--; /* If there were any matches, then look through them finding out the lowest common denominator. That then becomes match_list[0]. */ if (matches) compute_lcd_of_matches (match_list, matches, text); else /* There were no matches. */ { free (match_list); match_list = (char **)NULL; } return (match_list); } /* A completion function for usernames. TEXT contains a partial username preceded by a random character (usually `~'). */ char * rl_username_completion_function (text, state) const char *text; int state; { #if defined (__WIN32__) || defined (__OPENNT) return (char *)NULL; #else /* !__WIN32__ && !__OPENNT) */ static char *username = (char *)NULL; static struct passwd *entry; static int namelen, first_char, first_char_loc; char *value; if (state == 0) { FREE (username); first_char = *text; first_char_loc = first_char == '~'; username = savestring (&text[first_char_loc]); namelen = strlen (username); setpwent (); } #if defined (HAVE_GETPWENT) while (entry = getpwent ()) { /* Null usernames should result in all users as possible completions. */ if (namelen == 0 || (STREQN (username, entry->pw_name, namelen))) break; } #endif if (entry == 0) { #if defined (HAVE_GETPWENT) endpwent (); #endif return ((char *)NULL); } else { value = (char *)xmalloc (2 + strlen (entry->pw_name)); *value = *text; strcpy (value + first_char_loc, entry->pw_name); if (first_char == '~') rl_filename_completion_desired = 1; return (value); } #endif /* !__WIN32__ && !__OPENNT */ } /* Okay, now we write the entry_function for filename completion. In the general case. Note that completion in the shell is a little different because of all the pathnames that must be followed when looking up the completion for a command. */ char * rl_filename_completion_function (text, state) const char *text; int state; { static DIR *directory = (DIR *)NULL; static char *filename = (char *)NULL; static char *dirname = (char *)NULL; static char *users_dirname = (char *)NULL; static int filename_len; char *temp, *dentry, *convfn; int dirlen, dentlen, convlen; struct dirent *entry; /* If we don't have any state, then do some initialization. */ if (state == 0) { /* If we were interrupted before closing the directory or reading all of its contents, close it. */ if (directory) { closedir (directory); directory = (DIR *)NULL; } FREE (dirname); FREE (filename); FREE (users_dirname); filename = savestring (text); if (*text == 0) text = "."; dirname = savestring (text); temp = strrchr (dirname, '/'); #if defined (__MSDOS__) /* special hack for //X/... */ if (dirname[0] == '/' && dirname[1] == '/' && ISALPHA ((unsigned char)dirname[2]) && dirname[3] == '/') temp = strrchr (dirname + 3, '/'); #endif if (temp) { strcpy (filename, ++temp); *temp = '\0'; } #if defined (__MSDOS__) /* searches from current directory on the drive */ else if (ISALPHA ((unsigned char)dirname[0]) && dirname[1] == ':') { strcpy (filename, dirname + 2); dirname[2] = '\0'; } #endif else { dirname[0] = '.'; dirname[1] = '\0'; } /* We aren't done yet. We also support the "~user" syntax. */ /* Save the version of the directory that the user typed. */ users_dirname = savestring (dirname); if (*dirname == '~') { temp = tilde_expand (dirname); free (dirname); dirname = temp; } if (rl_directory_rewrite_hook) (*rl_directory_rewrite_hook) (&dirname); /* The directory completion hook should perform any necessary dequoting. */ if (rl_directory_completion_hook && (*rl_directory_completion_hook) (&dirname)) { free (users_dirname); users_dirname = savestring (dirname); } else if (rl_completion_found_quote && rl_filename_dequoting_function) { /* delete single and double quotes */ temp = (*rl_filename_dequoting_function) (users_dirname, rl_completion_quote_character); free (users_dirname); users_dirname = temp; } directory = opendir (dirname); /* Now dequote a non-null filename. */ if (filename && *filename && rl_completion_found_quote && rl_filename_dequoting_function) { /* delete single and double quotes */ temp = (*rl_filename_dequoting_function) (filename, rl_completion_quote_character); free (filename); filename = temp; } filename_len = strlen (filename); rl_filename_completion_desired = 1; } /* At this point we should entertain the possibility of hacking wildcarded filenames, like /usr/man/man/te. If the directory name contains globbing characters, then build an array of directories, and then map over that list while completing. */ /* *** UNIMPLEMENTED *** */ /* Now that we have some state, we can read the directory. */ entry = (struct dirent *)NULL; while (directory && (entry = readdir (directory))) { convfn = dentry = entry->d_name; convlen = dentlen = D_NAMLEN (entry); if (rl_filename_rewrite_hook) { convfn = (*rl_filename_rewrite_hook) (dentry, dentlen); convlen = (convfn == dentry) ? dentlen : strlen (convfn); } /* Special case for no filename. If the user has disabled the `match-hidden-files' variable, skip filenames beginning with `.'. All other entries except "." and ".." match. */ if (filename_len == 0) { if (_rl_match_hidden_files == 0 && HIDDEN_FILE (entry->d_name)) continue; if (convfn[0] != '.' || (convfn[1] && (convfn[1] != '.' || convfn[2]))) break; } else { /* Otherwise, if these match up to the length of filename, then it is a match. */ if (_rl_completion_case_fold) { if ((_rl_to_lower (convfn[0]) == _rl_to_lower (filename[0])) && (convlen >= filename_len) && (_rl_strnicmp (filename, convfn, filename_len) == 0)) break; } else { if ((convfn[0] == filename[0]) && (convlen >= filename_len) && (strncmp (filename, convfn, filename_len) == 0)) break; } } } if (entry == 0) { if (directory) { closedir (directory); directory = (DIR *)NULL; } if (dirname) { free (dirname); dirname = (char *)NULL; } if (filename) { free (filename); filename = (char *)NULL; } if (users_dirname) { free (users_dirname); users_dirname = (char *)NULL; } return (char *)NULL; } else { /* dirname && (strcmp (dirname, ".") != 0) */ if (dirname && (dirname[0] != '.' || dirname[1])) { if (rl_complete_with_tilde_expansion && *users_dirname == '~') { dirlen = strlen (dirname); temp = (char *)xmalloc (2 + dirlen + D_NAMLEN (entry)); strcpy (temp, dirname); /* Canonicalization cuts off any final slash present. We may need to add it back. */ if (dirname[dirlen - 1] != '/') { temp[dirlen++] = '/'; temp[dirlen] = '\0'; } } else { dirlen = strlen (users_dirname); temp = (char *)xmalloc (2 + dirlen + D_NAMLEN (entry)); strcpy (temp, users_dirname); /* Make sure that temp has a trailing slash here. */ if (users_dirname[dirlen - 1] != '/') temp[dirlen++] = '/'; } strcpy (temp + dirlen, entry->d_name); } else temp = savestring (convfn); if (convfn != dentry) free (convfn); return (temp); } } /* An initial implementation of a menu completion function a la tcsh. The first time (if the last readline command was not rl_old_menu_complete), we generate the list of matches. This code is very similar to the code in rl_complete_internal -- there should be a way to combine the two. Then, for each item in the list of matches, we insert the match in an undoable fashion, with the appropriate character appended (this happens on the second and subsequent consecutive calls to rl_old_menu_complete). When we hit the end of the match list, we restore the original unmatched text, ring the bell, and reset the counter to zero. */ int rl_old_menu_complete (count, invoking_key) int count, invoking_key; { rl_compentry_func_t *our_func; int matching_filenames, found_quote; static char *orig_text; static char **matches = (char **)0; static int match_list_index = 0; static int match_list_size = 0; static int orig_start, orig_end; static char quote_char; static int delimiter; /* The first time through, we generate the list of matches and set things up to insert them. */ if (rl_last_func != rl_old_menu_complete) { /* Clean up from previous call, if any. */ FREE (orig_text); if (matches) _rl_free_match_list (matches); match_list_index = match_list_size = 0; matches = (char **)NULL; rl_completion_invoking_key = invoking_key; RL_SETSTATE(RL_STATE_COMPLETING); /* Only the completion entry function can change these. */ set_completion_defaults ('%'); our_func = rl_menu_completion_entry_function; if (our_func == 0) our_func = rl_completion_entry_function ? rl_completion_entry_function : rl_filename_completion_function; /* We now look backwards for the start of a filename/variable word. */ orig_end = rl_point; found_quote = delimiter = 0; quote_char = '\0'; if (rl_point) /* This (possibly) changes rl_point. If it returns a non-zero char, we know we have an open quote. */ quote_char = _rl_find_completion_word (&found_quote, &delimiter); orig_start = rl_point; rl_point = orig_end; orig_text = rl_copy_text (orig_start, orig_end); matches = gen_completion_matches (orig_text, orig_start, orig_end, our_func, found_quote, quote_char); /* If we are matching filenames, the attempted completion function will have set rl_filename_completion_desired to a non-zero value. The basic rl_filename_completion_function does this. */ matching_filenames = rl_filename_completion_desired; if (matches == 0 || postprocess_matches (&matches, matching_filenames) == 0) { rl_ding (); FREE (matches); matches = (char **)0; FREE (orig_text); orig_text = (char *)0; completion_changed_buffer = 0; RL_UNSETSTATE(RL_STATE_COMPLETING); return (0); } RL_UNSETSTATE(RL_STATE_COMPLETING); for (match_list_size = 0; matches[match_list_size]; match_list_size++) ; /* matches[0] is lcd if match_list_size > 1, but the circular buffer code below should take care of it. */ if (match_list_size > 1 && _rl_complete_show_all) display_matches (matches); } /* Now we have the list of matches. Replace the text between rl_line_buffer[orig_start] and rl_line_buffer[rl_point] with matches[match_list_index], and add any necessary closing char. */ if (matches == 0 || match_list_size == 0) { rl_ding (); FREE (matches); matches = (char **)0; completion_changed_buffer = 0; return (0); } match_list_index += count; if (match_list_index < 0) match_list_index += match_list_size; else match_list_index %= match_list_size; if (match_list_index == 0 && match_list_size > 1) { rl_ding (); insert_match (orig_text, orig_start, MULT_MATCH, "e_char); } else { insert_match (matches[match_list_index], orig_start, SINGLE_MATCH, "e_char); append_to_match (matches[match_list_index], delimiter, quote_char, strcmp (orig_text, matches[match_list_index])); } completion_changed_buffer = 1; return (0); } int rl_menu_complete (count, ignore) int count, ignore; { rl_compentry_func_t *our_func; int matching_filenames, found_quote; static char *orig_text; static char **matches = (char **)0; static int match_list_index = 0; static int match_list_size = 0; static int nontrivial_lcd = 0; static int full_completion = 0; /* set to 1 if menu completion should reinitialize on next call */ static int orig_start, orig_end; static char quote_char; static int delimiter; /* The first time through, we generate the list of matches and set things up to insert them. */ if ((rl_last_func != rl_menu_complete && rl_last_func != rl_backward_menu_complete) || full_completion) { /* Clean up from previous call, if any. */ FREE (orig_text); if (matches) _rl_free_match_list (matches); match_list_index = match_list_size = 0; matches = (char **)NULL; full_completion = 0; RL_SETSTATE(RL_STATE_COMPLETING); /* Only the completion entry function can change these. */ set_completion_defaults ('%'); our_func = rl_menu_completion_entry_function; if (our_func == 0) our_func = rl_completion_entry_function ? rl_completion_entry_function : rl_filename_completion_function; /* We now look backwards for the start of a filename/variable word. */ orig_end = rl_point; found_quote = delimiter = 0; quote_char = '\0'; if (rl_point) /* This (possibly) changes rl_point. If it returns a non-zero char, we know we have an open quote. */ quote_char = _rl_find_completion_word (&found_quote, &delimiter); orig_start = rl_point; rl_point = orig_end; orig_text = rl_copy_text (orig_start, orig_end); matches = gen_completion_matches (orig_text, orig_start, orig_end, our_func, found_quote, quote_char); nontrivial_lcd = matches && strcmp (orig_text, matches[0]) != 0; /* If we are matching filenames, the attempted completion function will have set rl_filename_completion_desired to a non-zero value. The basic rl_filename_completion_function does this. */ matching_filenames = rl_filename_completion_desired; if (matches == 0 || postprocess_matches (&matches, matching_filenames) == 0) { rl_ding (); FREE (matches); matches = (char **)0; FREE (orig_text); orig_text = (char *)0; completion_changed_buffer = 0; RL_UNSETSTATE(RL_STATE_COMPLETING); return (0); } RL_UNSETSTATE(RL_STATE_COMPLETING); for (match_list_size = 0; matches[match_list_size]; match_list_size++) ; if (match_list_size == 0) { rl_ding (); FREE (matches); matches = (char **)0; match_list_index = 0; completion_changed_buffer = 0; return (0); } /* matches[0] is lcd if match_list_size > 1, but the circular buffer code below should take care of it. */ if (*matches[0]) { insert_match (matches[0], orig_start, matches[1] ? MULT_MATCH : SINGLE_MATCH, "e_char); orig_end = orig_start + strlen (matches[0]); completion_changed_buffer = STREQ (orig_text, matches[0]) == 0; } if (match_list_size > 1 && _rl_complete_show_all) { display_matches (matches); /* If there are so many matches that the user has to be asked whether or not he wants to see the matches, menu completion is unwieldy. */ if (rl_completion_query_items > 0 && match_list_size >= rl_completion_query_items) { rl_ding (); FREE (matches); matches = (char **)0; full_completion = 1; return (0); } } else if (match_list_size <= 1) { append_to_match (matches[0], delimiter, quote_char, nontrivial_lcd); full_completion = 1; return (0); } } /* Now we have the list of matches. Replace the text between rl_line_buffer[orig_start] and rl_line_buffer[rl_point] with matches[match_list_index], and add any necessary closing char. */ if (matches == 0 || match_list_size == 0) { rl_ding (); FREE (matches); matches = (char **)0; completion_changed_buffer = 0; return (0); } match_list_index += count; if (match_list_index < 0) match_list_index += match_list_size; else match_list_index %= match_list_size; if (match_list_index == 0 && match_list_size > 1) { rl_ding (); insert_match (matches[0], orig_start, MULT_MATCH, "e_char); } else { insert_match (matches[match_list_index], orig_start, SINGLE_MATCH, "e_char); append_to_match (matches[match_list_index], delimiter, quote_char, strcmp (orig_text, matches[match_list_index])); } completion_changed_buffer = 1; return (0); } int rl_backward_menu_complete (count, key) int count, key; { /* Positive arguments to backward-menu-complete translate into negative arguments for menu-complete, and vice versa. */ return (rl_menu_complete (-count, key)); }