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- /* complete.c -- filename completion for readline. */
-
- /* Copyright (C) 1987, 1989, 1992 Free Software Foundation, Inc.
-
- This file is part of the GNU Readline Library, a library for
- reading lines of text with interactive input and history editing.
-
- The GNU Readline Library is free software; you can redistribute it
- and/or modify it under the terms of the GNU General Public License
- as published by the Free Software Foundation; either version 1, or
- (at your option) any later version.
-
- The GNU Readline Library 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.
-
- The GNU General Public License is often shipped with GNU software, and
- is generally kept in a file called COPYING or LICENSE. If you do not
- have a copy of the license, write to the Free Software Foundation,
- 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #include "sysdep.h"
- #include <stdio.h>
- #include <fcntl.h>
- #if !defined (NO_SYS_FILE)
- # include <sys/file.h>
- #endif /* !NO_SYS_FILE */
-
- #include <errno.h>
- /* Not all systems declare ERRNO in errno.h... and some systems #define it! */
- #if !defined (errno)
- extern int errno;
- #endif /* !errno */
-
- /* These next are for filename completion. Perhaps this belongs
- in a different place. */
- #if !defined(__MSDOS__) && !defined(WIN32)
- #include <pwd.h>
- #endif /* __MSDOS__ */
- #if defined (USG) && !defined (isc386) && !defined (sgi)
- extern struct passwd *getpwuid (), *getpwent ();
- #endif
- #if defined (isc386) && !defined (__STDC__) && defined (_POSIX_SOURCE)
- extern struct passwd *getpwent ();
- #endif
-
- /* Included by <fcntl.h> on some systems, but not SCO, so include it here. */
- #include <sys/stat.h>
-
- /* System-specific feature definitions and include files. */
- #include "rldefs.h"
-
- /* Some standard library routines. */
- #include "readline.h"
-
- /* Possible values for do_replace in rl_complete_internal. */
- #define NO_MATCH 0
- #define SINGLE_MATCH 1
- #define MULT_MATCH 2
-
- #if !defined (strchr) && !defined (__STDC__)
- extern char *strchr (), *strrchr ();
- #endif /* !strchr && !__STDC__ */
-
- extern char *tilde_expand ();
- extern char *rl_copy_text ();
-
- extern Function *rl_last_func;
- extern int rl_editing_mode;
- extern int screenwidth;
-
- /* Forward declarations for functions defined and used in this file. */
- char *filename_completion_function ();
- char **completion_matches ();
-
- static int compare_strings ();
- static char *rl_strpbrk ();
-
- #if defined (STATIC_MALLOC)
- static char *xmalloc (), *xrealloc ();
- #else
- extern char *xmalloc (), *xrealloc ();
- #endif /* STATIC_MALLOC */
-
- /* 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. */
- Function *rl_symbolic_link_hook = (Function *)NULL;
-
- /* Non-zero means readline completion functions perform tilde expansion. */
- int rl_complete_with_tilde_expansion = 0;
-
- #define VISIBLE_STATS
-
- #if defined (VISIBLE_STATS)
- # if !defined (X_OK)
- # define X_OK 1
- # endif
-
- static int stat_char ();
-
- /* 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 */
-
- /* **************************************************************** */
- /* */
- /* Completion matching, from readline's point of view. */
- /* */
- /* **************************************************************** */
-
- /* Pointer to the generator function for completion_matches ().
- NULL means to use filename_entry_function (), the default filename
- completer. */
- Function *rl_completion_entry_function = (Function *)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. */
- CPPFunction *rl_attempted_completion_function = (CPPFunction *)NULL;
-
- /* Local variable states what happened during the last completion attempt. */
- static int completion_changed_buffer = 0;
-
- /* Complete the word at or before point. You have supplied the function
- that does the initial simple matching selection algorithm (see
- completion_matches ()). The default is to do filename completion. */
-
- rl_complete (ignore, invoking_key)
- int ignore, invoking_key;
- {
- if (rl_last_func == rl_complete && !completion_changed_buffer)
- rl_complete_internal ('?');
- else
- rl_complete_internal (TAB);
- }
-
- /* List the possible completions. See description of rl_complete (). */
- rl_possible_completions (ignore, invoking_key)
- int ignore, invoking_key;
- {
- rl_complete_internal ('?');
- }
-
- rl_insert_completions (ignore, invoking_key)
- int ignore, invoking_key;
- {
- rl_complete_internal ('*');
- }
-
- /* The user must press "y" or "n". Non-zero return means "y" pressed. */
- get_y_or_n ()
- {
- int c;
-
- for (;;)
- {
- c = rl_read_key ();
- if (c == 'y' || c == 'Y')
- return (1);
- if (c == 'n' || c == 'N')
- return (0);
- if (c == ABORT_CHAR)
- rl_abort ();
- ding ();
- }
- }
-
- /* 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. */
- int rl_completion_query_items = 100;
-
- /* 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\"\\'`@$><=" */
- char *rl_basic_word_break_characters = " \t\n\"\\'`@$><=;|&{(";
-
- /* 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. */
- char *rl_completer_word_break_characters = (char *)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. */
- char *rl_completer_quote_characters = (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. */
- char *rl_special_prefixes = (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;
-
- /* 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. */
- Function *rl_ignore_some_completions_function = (Function *)NULL;
-
- #if defined (SHELL)
- /* A function to strip quotes that are not protected by backquotes. It
- allows single quotes to appear within double quotes, and vice versa.
- It should be smarter. It's fairly shell-specific, hence the SHELL
- definition wrapper. */
- static char *
- _delete_quotes (text)
- char *text;
- {
- char *ret, *p, *r;
- int l, quoted;
-
- l = strlen (text);
- ret = xmalloc (l + 1);
- for (quoted = 0, p = text, r = ret; p && *p; p++)
- {
- /* Allow backslash-quoted characters to pass through unscathed. */
- if (*p == '\\')
- continue;
- /* Close quote. */
- if (quoted && *p == quoted)
- {
- quoted = 0;
- continue;
- }
- /* Open quote. */
- if (quoted == 0 && (*p == '\'' || *p == '"'))
- {
- quoted = *p;
- continue;
- }
- *r++ = *p;
- }
- *r = '\0';
- return ret;
- }
- #endif /* SHELL */
-
- /* 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. */
- rl_complete_internal (what_to_do)
- int what_to_do;
- {
- char **matches;
- Function *our_func;
- int start, scan, end, delimiter = 0, pass_next;
- char *text, *saved_line_buffer;
- char *replacement;
- char quote_char = '\0';
- #if defined (SHELL)
- int found_quote = 0;
- #endif
-
- if (rl_line_buffer)
- saved_line_buffer = savestring (rl_line_buffer);
- else
- saved_line_buffer = (char *)NULL;
-
- if (rl_completion_entry_function)
- our_func = rl_completion_entry_function;
- else
- our_func = (Function *)filename_completion_function;
-
- /* Only the completion entry function can change this. */
- rl_filename_completion_desired = 0;
-
- /* We now look backwards for the start of a filename/variable word. */
- end = rl_point;
-
- if (rl_point)
- {
- 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++)
- {
- if (pass_next)
- {
- pass_next = 0;
- continue;
- }
-
- if (rl_line_buffer[scan] == '\\')
- {
- pass_next = 1;
- 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;
- #if defined (SHELL)
- if (quote_char == '\'')
- found_quote |= 1;
- else if (quote_char == '"')
- found_quote |= 2;
- #endif
- }
- }
- }
-
- if (rl_point == end)
- {
- int quoted = 0;
- /* We didn't find an unclosed quoted substring up which to do
- completion, so use the word break characters to find the
- substring on which to complete. */
- while (--rl_point)
- {
- #if defined (SHELL)
- /* Don't let word break characters in quoted substrings break
- words for the completer. */
- if (found_quote)
- {
- if (strchr (rl_completer_quote_characters, rl_line_buffer[rl_point]))
- {
- quoted = !quoted;
- continue;
- }
- if (quoted)
- continue;
- }
- #endif /* SHELL */
- if (strchr (rl_completer_word_break_characters, rl_line_buffer[rl_point]))
- break;
- }
- }
-
- /* If we are at a word break, then advance past it. */
- if (strchr (rl_completer_word_break_characters, rl_line_buffer[rl_point]))
- {
- /* If the character that caused the word break was a quoting
- character, then remember it as the delimiter. */
- if (strchr ("\"'", rl_line_buffer[rl_point]) && (end - rl_point) > 1)
- delimiter = rl_line_buffer[rl_point];
-
- /* 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 ||
- !strchr (rl_special_prefixes, rl_line_buffer[rl_point]))
- rl_point++;
- }
- }
-
- /* At this point, we know we have an open quote if quote_char != '\0'. */
- start = rl_point;
- rl_point = end;
- text = rl_copy_text (start, end);
-
- /* 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)
- {
- matches = (*rl_attempted_completion_function) (text, start, end);
-
- if (matches)
- {
- /* XXX - This is questionable code. - XXX */
- if (matches == (char **)-1)
- matches = (char **)NULL;
- our_func = (Function *)NULL;
- goto after_usual_completion;
- }
- }
-
- #if defined (SHELL)
- /* Beware -- we're stripping the quotes here. Do this only if we know
- we are doing filename completion. */
- if (found_quote && our_func == (Function *)filename_completion_function)
- {
- /* delete single and double quotes */
- replacement = _delete_quotes (text);
- free (text);
- text = replacement;
- replacement = (char *)0;
- }
- #endif /* SHELL */
-
- matches = completion_matches (text, our_func);
-
- after_usual_completion:
- free (text);
-
- if (!matches)
- ding ();
- else
- {
- register int i;
-
- /* 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)
- {
- char *lowest_common;
- int j, newlen = 0;
- char dead_slot;
-
- /* Sort the items. */
- /* It is safe to sort this array, because the lowest common
- denominator found in matches[0] will remain in place. */
- for (i = 0; matches[i]; i++);
- qsort (matches, i, sizeof (char *), compare_strings);
-
- /* Remember the lowest common denominator for it may be unique. */
- lowest_common = savestring (matches[0]);
-
- for (i = 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. */
- {
- char **temp_array =
- (char **)xmalloc ((3 + newlen) * sizeof (char *));
-
- for (i = 1, 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]);
-
- free (matches);
-
- matches = temp_array;
- }
-
- /* Place the lowest common denominator back in [0]. */
- matches[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 (matches[0], matches[1]) == 0)
- {
- free (matches[1]);
- matches[1] = (char *)NULL;
- }
- }
-
- switch (what_to_do)
- {
- case TAB:
- /* 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 &&
- our_func == (Function *)filename_completion_function)
- (void)(*rl_ignore_some_completions_function)(matches);
-
- /* 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 = matches[0];
-
- if (matches[0] && rl_completer_quote_characters && !quote_char &&
- rl_filename_completion_desired)
- {
- int do_replace;
-
- do_replace = NO_MATCH;
-
- /* 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. If the common prefix should
- not be checked, add !matches[1] to the if clause. */
- if (rl_strpbrk (matches[0], rl_completer_word_break_characters))
- do_replace = matches[1] ? MULT_MATCH : SINGLE_MATCH;
-
- if (do_replace != NO_MATCH)
- {
- #if defined (SHELL)
- /* XXX - experimental */
- /* Quote the replacement, since we found an
- embedded word break character in a potential
- match. */
- char *rtext, *mtext;
- int rlen;
- extern char *double_quote (); /* in builtins/common.c */
-
- /* If DO_REPLACE == MULT_MATCH, it means that there is
- more than one match. In this case, we do not add
- the closing quote or attempt to perform tilde
- expansion. If DO_REPLACE == SINGLE_MATCH, we try
- to perform tilde expansion, because double quotes
- inhibit tilde expansion by the shell. */
-
- mtext = matches[0];
- if (mtext[0] == '~' && do_replace == SINGLE_MATCH)
- mtext = tilde_expand (matches[0]);
- rtext = double_quote (mtext);
- if (mtext != matches[0])
- free (mtext);
-
- rlen = strlen (rtext);
- replacement = (char *)alloca (rlen + 1);
- strcpy (replacement, rtext);
- if (do_replace == MULT_MATCH)
- replacement[rlen - 1] = '\0';
- free (rtext);
- #else /* !SHELL */
- /* Found an embedded word break character in a potential
- match, so we need to prepend a quote character if we
- are replacing the completion string. */
- replacement = (char *)alloca (strlen (matches[0]) + 2);
- quote_char = *rl_completer_quote_characters;
- *replacement = quote_char;
- strcpy (replacement + 1, matches[0]);
- #endif /* SHELL */
- }
- }
-
- if (replacement)
- {
- rl_delete_text (start, rl_point);
- rl_point = start;
- rl_insert_text (replacement);
- }
-
- /* If there are more matches, ring the bell to indicate.
- If this was the only match, and we are hacking files,
- check the file to see if it was a directory. If so,
- add a '/' to the name. If not, and we are at the end
- of the line, then add a space. */
- if (matches[1])
- {
- if (rl_editing_mode != vi_mode)
- ding (); /* There are other matches remaining. */
- }
- else
- {
- char temp_string[4];
- int temp_string_index = 0;
-
- if (quote_char)
- temp_string[temp_string_index++] = quote_char;
-
- #ifdef NeXT /* who wants this cursed space, anyway??? */
- temp_string[temp_string_index++] = delimiter ? delimiter : '\0';
- #else
- temp_string[temp_string_index++] = delimiter ? delimiter : ' ';
- #endif /* NeXT */
- temp_string[temp_string_index++] = '\0';
-
- if (rl_filename_completion_desired)
- {
- struct stat finfo;
- char *filename = tilde_expand (matches[0]);
-
- if ((stat (filename, &finfo) == 0) &&
- S_ISDIR (finfo.st_mode))
- {
- if (rl_line_buffer[rl_point] != '/')
- rl_insert_text ("/");
- }
- else
- {
- if (rl_point == rl_end)
- rl_insert_text (temp_string);
- }
- free (filename);
- }
- else
- {
- if (rl_point == rl_end)
- rl_insert_text (temp_string);
- }
- }
- break;
-
- case '*':
- {
- int i = 1;
-
- rl_delete_text (start, rl_point);
- rl_point = start;
- rl_begin_undo_group ();
- if (matches[1])
- {
- while (matches[i])
- {
- rl_insert_text (matches[i++]);
- rl_insert_text (" ");
- }
- }
- else
- {
- rl_insert_text (matches[0]);
- rl_insert_text (" ");
- }
- rl_end_undo_group ();
- }
- break;
-
- case '?':
- {
- int len, count, limit, max = 0;
- int j, k, l;
-
- /* Handle simple case first. What if there is only one answer? */
- if (!matches[1])
- {
- char *temp = (char *)NULL;
-
- if (rl_filename_completion_desired)
- temp = strrchr (matches[0], '/');
-
- if (!temp)
- temp = matches[0];
- else
- temp++;
-
- crlf ();
- fprintf (rl_outstream, "%s", temp);
- #if defined (VISIBLE_STATS)
- if (rl_filename_completion_desired && rl_visible_stats)
- {
- int extension_char;
-
- extension_char = stat_char (matches[0]);
- if (extension_char)
- putc (extension_char, rl_outstream);
- }
- #endif /* VISIBLE_STATS */
- crlf ();
- goto restart;
- }
-
- /* There is more than one answer. Find out how many there are,
- and find out what the maximum printed length of a single entry
- is. */
- for (i = 1; matches[i]; i++)
- {
- char *temp;
- int name_length;
-
- /* If we are hacking filenames, then only count the characters
- after the last slash in the pathname. */
- if (rl_filename_completion_desired)
- temp = strrchr (matches[i], '/');
- else
- temp = (char *)NULL;
-
- if (!temp)
- temp = matches[i];
- else
- temp++;
-
- name_length = strlen (temp);
-
- if (name_length > max)
- max = name_length;
- }
-
- len = i - 1;
-
- /* If there are many items, then ask the user if she
- really wants to see them all. */
- if (len >= rl_completion_query_items)
- {
- crlf ();
- fprintf (rl_outstream,
- "There are %d possibilities. Do you really", len);
- crlf ();
- fprintf (rl_outstream, "wish to see them all? (y or n)");
- fflush (rl_outstream);
- if (!get_y_or_n ())
- {
- crlf ();
- goto restart;
- }
- }
-
- /* How many items of MAX length can we fit in the screen window? */
- max += 2;
- limit = screenwidth / max;
- if (limit != 1 && (limit * max == screenwidth))
- limit--;
-
- /* Avoid a possible floating exception. If max > 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. */
- if (len < limit)
- count = 1;
-
- /* Sort the items if they are not already sorted. */
- if (!rl_ignore_completion_duplicates)
- qsort (matches, len, sizeof (char *), compare_strings);
-
- /* Print the sorted items, up-and-down alphabetically, like
- ls might. */
- crlf ();
-
- for (i = 1; i < count + 1; i++)
- {
- for (j = 0, l = i; j < limit; j++)
- {
- if (l > len || !matches[l])
- {
- break;
- }
- else
- {
- char *temp = (char *)NULL;
- int printed_length;
-
- if (rl_filename_completion_desired)
- temp = strrchr (matches[l], '/');
-
- if (!temp)
- temp = matches[l];
- else
- temp++;
-
- printed_length = strlen (temp);
- fprintf (rl_outstream, "%s", temp);
-
- #if defined (VISIBLE_STATS)
- if (rl_filename_completion_desired &&
- rl_visible_stats)
- {
- int extension_char;
-
- extension_char = stat_char (matches[l]);
-
- if (extension_char)
- {
- putc (extension_char, rl_outstream);
- printed_length++;
- }
- }
- #endif /* VISIBLE_STATS */
-
- if (j + 1 < limit)
- {
- for (k = 0; k < max - printed_length; k++)
- putc (' ', rl_outstream);
- }
- }
- l += count;
- }
- crlf ();
- }
- restart:
-
- rl_on_new_line ();
- }
- break;
-
- default:
- fprintf (stderr, "\r\nreadline: bad value for what_to_do in rl_complete\n");
- abort ();
- }
-
- for (i = 0; matches[i]; i++)
- free (matches[i]);
- free (matches);
- }
-
- /* Check to see if the line has changed through all of this manipulation. */
- if (saved_line_buffer)
- {
- if (strcmp (rl_line_buffer, saved_line_buffer) != 0)
- completion_changed_buffer = 1;
- else
- completion_changed_buffer = 0;
-
- free (saved_line_buffer);
- }
- }
-
- #if defined (VISIBLE_STATS)
- /* Return the character which best describes FILENAME.
- `@' for symbolic links
- `/' for directories
- `*' for executables
- `=' for sockets */
- static int
- stat_char (filename)
- char *filename;
- {
- struct stat finfo;
- int character = 0;
-
- if (stat (filename, &finfo) == -1)
- return (character);
-
- if (S_ISDIR (finfo.st_mode))
- character = '/';
- #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 */
- else if (S_ISREG (finfo.st_mode))
- {
- if (access (filename, X_OK) == 0)
- character = '*';
- }
- return (character);
- }
- #endif /* VISIBLE_STATS */
-
- /* Stupid comparison routine for qsort () ing strings. */
- static int
- compare_strings (s1, s2)
- char **s1, **s2;
- {
- return (strcmp (*s1, *s2));
- }
-
- /* A completion function for usernames.
- TEXT contains a partial username preceded by a random
- character (usually `~'). */
- char *
- username_completion_function (text, state)
- int state;
- char *text;
- {
- #if defined (MINIMAL)
- return (char *)NULL;
- #else /* !MINIMAL */
- static char *username = (char *)NULL;
- static struct passwd *entry;
- static int namelen, first_char, first_char_loc;
-
- if (!state)
- {
- if (username)
- free (username);
-
- first_char = *text;
-
- if (first_char == '~')
- first_char_loc = 1;
- else
- first_char_loc = 0;
-
- username = savestring (&text[first_char_loc]);
- namelen = strlen (username);
- setpwent ();
- }
-
- while (entry = getpwent ())
- {
- if (strncmp (username, entry->pw_name, namelen) == 0)
- break;
- }
-
- if (!entry)
- {
- endpwent ();
- return ((char *)NULL);
- }
- else
- {
- char *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 /* !MINIMAL */
- }
-
- /* **************************************************************** */
- /* */
- /* Completion */
- /* */
- /* **************************************************************** */
-
- /* Non-zero means that case is not significant in completion. */
- int completion_case_fold = 0;
-
- /* 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 **
- completion_matches (text, entry_function)
- char *text;
- CPFunction *entry_function;
- {
- /* Number of slots in match_list. */
- int match_list_size;
-
- /* The list of matches. */
- char **match_list =
- (char **)xmalloc (((match_list_size = 10) + 1) * sizeof (char *));
-
- /* Number of matches actually found. */
- int matches = 0;
-
- /* Temporary string binder. */
- char *string;
-
- match_list[1] = (char *)NULL;
-
- 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 there were any matches, then look through them finding out the
- lowest common denominator. That then becomes match_list[0]. */
- if (matches)
- {
- register int i = 1;
- int low = 100000; /* Count of max-matched characters. */
-
- /* If only one match, just use that. */
- if (matches == 1)
- {
- match_list[0] = match_list[1];
- match_list[1] = (char *)NULL;
- }
- else
- {
- /* Otherwise, compare each member of the list with
- the next, finding out where they stop matching. */
-
- while (i < matches)
- {
- register int c1, c2, si;
-
- if (completion_case_fold)
- {
- for (si = 0;
- (c1 = to_lower(match_list[i][si])) &&
- (c2 = to_lower(match_list[i + 1][si]));
- si++)
- if (c1 != c2) break;
- }
- else
- {
- for (si = 0;
- (c1 = match_list[i][si]) &&
- (c2 = match_list[i + 1][si]);
- si++)
- if (c1 != c2) break;
- }
-
- if (low > si) low = si;
- i++;
- }
- match_list[0] = (char *)xmalloc (low + 1);
- strncpy (match_list[0], match_list[1], low);
- match_list[0][low] = '\0';
- }
- }
- else /* There were no matches. */
- {
- free (match_list);
- match_list = (char **)NULL;
- }
- return (match_list);
- }
-
- /* 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 *
- filename_completion_function (text, state)
- int state;
- char *text;
- {
- #ifndef WIN32
- static DIR *directory;
- static char *filename = (char *)NULL;
- static char *dirname = (char *)NULL;
- static char *users_dirname = (char *)NULL;
- static int filename_len;
-
- dirent *entry = (dirent *)NULL;
-
- /* If we don't have any state, then do some initialization. */
- if (!state)
- {
- char *temp;
-
- if (dirname) free (dirname);
- if (filename) free (filename);
- if (users_dirname) free (users_dirname);
-
- filename = savestring (text);
- if (!*text) text = ".";
- dirname = savestring (text);
-
- temp = strrchr (dirname, '/');
-
- if (temp)
- {
- strcpy (filename, ++temp);
- *temp = '\0';
- }
- else
- strcpy (dirname, ".");
-
- /* 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);
- {
- char *temp_dirname;
-
- temp_dirname = tilde_expand (dirname);
- free (dirname);
- dirname = temp_dirname;
-
- if (rl_symbolic_link_hook)
- (*rl_symbolic_link_hook) (&dirname);
- }
- directory = opendir (dirname);
- 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<WILD>/te<TAB>. 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. */
-
- while (directory && (entry = readdir (directory)))
- {
- /* Special case for no filename.
- All entries except "." and ".." match. */
- if (!filename_len)
- {
- if ((strcmp (entry->d_name, ".") != 0) &&
- (strcmp (entry->d_name, "..") != 0))
- break;
- }
- else
- {
- /* Otherwise, if these match upto the length of filename, then
- it is a match. */
- if (((int)D_NAMLEN (entry)) >= filename_len &&
- (entry->d_name[0] == filename[0]) &&
- (strncmp (filename, entry->d_name, filename_len) == 0))
- {
- break;
- }
- }
- }
-
- if (!entry)
- {
- 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
- {
- char *temp;
-
- if (dirname && (strcmp (dirname, ".") != 0))
- {
- if (rl_complete_with_tilde_expansion && *users_dirname == '~')
- {
- int dirlen = strlen (dirname);
- temp = (char *)xmalloc (2 + dirlen + D_NAMLEN (entry));
- strcpy (temp, dirname);
- /* Canonicalization cuts off any final slash present. We need
- to add it back. */
- if (dirname[dirlen - 1] != '/')
- {
- temp[dirlen] = '/';
- temp[dirlen + 1] = '\0';
- }
- }
- else
- {
- temp = (char *)
- xmalloc (1 + strlen (users_dirname) + D_NAMLEN (entry));
- strcpy (temp, users_dirname);
- }
-
- strcat (temp, entry->d_name);
- }
- else
- {
- temp = (savestring (entry->d_name));
- }
- return (temp);
- }
- #endif
- }
-
- /* A function for simple tilde expansion. */
- int
- rl_tilde_expand (ignore, key)
- int ignore, key;
- {
- register int start, end;
- char *homedir;
-
- end = rl_point;
- start = end - 1;
-
- if (rl_point == rl_end && rl_line_buffer[rl_point] == '~')
- {
- homedir = tilde_expand ("~");
- goto insert;
- }
- else if (rl_line_buffer[start] != '~')
- {
- for (; !whitespace (rl_line_buffer[start]) && start >= 0; start--);
- start++;
- }
-
- end = start;
- do
- {
- end++;
- }
- while (!whitespace (rl_line_buffer[end]) && end < rl_end);
-
- if (whitespace (rl_line_buffer[end]) || end >= rl_end)
- end--;
-
- /* If the first character of the current word is a tilde, perform
- tilde expansion and insert the result. If not a tilde, do
- nothing. */
- if (rl_line_buffer[start] == '~')
- {
- char *temp;
- int len;
-
- len = end - start + 1;
- temp = (char *)alloca (len + 1);
- strncpy (temp, rl_line_buffer + start, len);
- temp[len] = '\0';
- homedir = tilde_expand (temp);
-
- insert:
- rl_begin_undo_group ();
- rl_delete_text (start, end + 1);
- rl_point = start;
- rl_insert_text (homedir);
- rl_end_undo_group ();
- }
-
- return (0);
- }
-
- /* Find the first occurrence in STRING1 of any character from STRING2.
- Return a pointer to the character in STRING1. */
- static char *
- rl_strpbrk (string1, string2)
- char *string1, *string2;
- {
- register char *scan;
-
- for (; *string1; string1++)
- {
- for (scan = string2; *scan; scan++)
- {
- if (*string1 == *scan)
- {
- return (string1);
- }
- }
- }
- return ((char *)NULL);
- }
-
- #if defined (STATIC_MALLOC)
-
- /* **************************************************************** */
- /* */
- /* xmalloc and xrealloc () */
- /* */
- /* **************************************************************** */
-
- static void memory_error_and_abort ();
-
- static char *
- xmalloc (bytes)
- int bytes;
- {
- char *temp = (char *)malloc (bytes);
-
- if (!temp)
- memory_error_and_abort ();
- return (temp);
- }
-
- static char *
- xrealloc (pointer, bytes)
- char *pointer;
- int bytes;
- {
- char *temp;
-
- if (!pointer)
- temp = (char *)malloc (bytes);
- else
- temp = (char *)realloc (pointer, bytes);
-
- if (!temp)
- memory_error_and_abort ();
-
- return (temp);
- }
-
- static void
- memory_error_and_abort ()
- {
- fprintf (stderr, "readline: Out of virtual memory!\n");
- abort ();
- }
- #endif /* STATIC_MALLOC */
-