/usr/src/gnu/lib/libreadline/complete.c

Bug Summary

File:	src/gnu/lib/libreadline/complete.c
Warning:	line 840, column 11 Null pointer passed as 1st argument to string comparison function
Annotated Source Code

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clang -cc1 -cc1 -triple amd64-unknown-openbsd7.0 -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name complete.c -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 1 -fhalf-no-semantic-interposition -mframe-pointer=all -relaxed-aliasing -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -target-feature +retpoline-indirect-calls -target-feature +retpoline-indirect-branches -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/usr/src/gnu/lib/libreadline/obj -resource-dir /usr/local/lib/clang/13.0.0 -D HAVE_CONFIG_H -I /usr/src/gnu/lib/libreadline -D PIC -internal-isystem /usr/local/lib/clang/13.0.0/include -internal-externc-isystem /usr/include -O2 -fdebug-compilation-dir=/usr/src/gnu/lib/libreadline/obj -ferror-limit 19 -fwrapv -D_RET_PROTECTOR -ret-protector -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /home/ben/Projects/vmm/scan-build/2022-01-12-194120-40624-1 -x c /usr/src/gnu/lib/libreadline/complete.c
1/* complete.c -- filename completion for readline. */

3/* 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 2, 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,
 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
22#define READLINE_LIBRARY

24#if defined (HAVE_CONFIG_H1)
25#  include <config.h>
26#endif

28#include <sys/types.h>
29#include <fcntl.h>
30#if defined (HAVE_SYS_FILE_H1)
31#include <sys/file.h>
32#endif

34#if defined (HAVE_UNISTD_H1)
35#  include <unistd.h>
36#endif /* HAVE_UNISTD_H */

38#if defined (HAVE_STDLIB_H1)
39#  include <stdlib.h>
40#else
41#  include "ansi_stdlib.h"
42#endif /* HAVE_STDLIB_H */

44#include <stdio.h>

46#include <errno(*__errno()).h>
47#if !defined (errno(*__errno()))
48extern int errno(*__errno());
49#endif /* !errno */

51#include <pwd.h>

53#include "posixdir.h"
54#include "posixstat.h"

56/* System-specific feature definitions and include files. */
57#include "rldefs.h"
58#include "rlmbutil.h"

60/* Some standard library routines. */
61#include "readline.h"
62#include "xmalloc.h"
63#include "rlprivate.h"

65#ifdef __STDC__1
66typedef int QSFUNC (const void *, const void *);
67#else
68typedef int QSFUNC ();
69#endif

71#ifdef HAVE_LSTAT1
72#  define LSTATlstat lstat
73#else
74#  define LSTATlstat stat
75#endif

77/* Unix version of a hidden file.  Could be different on other systems. */
78#define HIDDEN_FILE(fname)((fname)[0] == '.')	((fname)[0] == '.')

80/* Most systems don't declare getpwent in <pwd.h> if _POSIX_SOURCE is
 defined. */
82#if !defined (HAVE_GETPW_DECLS1) || defined (_POSIX_SOURCE)
83extern struct passwd *getpwent PARAMS((void))(void);
84#endif /* !HAVE_GETPW_DECLS || _POSIX_SOURCE */

86/* 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. */
93rl_compdisp_func_t *rl_completion_display_matches_hook = (rl_compdisp_func_t *)NULL((void *)0);

95#if defined (VISIBLE_STATS)
96#  if !defined (X_OK0x01)
97#    define X_OK0x01 1
98#  endif
99static int stat_char PARAMS((char *))(char *);
100#endif

102static char *rl_quote_filename PARAMS((char *, int, char *))(char *, int, char *);

104static void set_completion_defaults PARAMS((int))(int);
105static int get_y_or_n PARAMS((int))(int);
106static int _rl_internal_pager PARAMS((int))(int);
107static char *printable_part PARAMS((char *))(char *);
108static int print_filename PARAMS((char *, char *))(char *, char *);

110static char **gen_completion_matches PARAMS((char *, int, int, rl_compentry_func_t *, int, int))(char *, int, int, rl_compentry_func_t *, int, int);

112static char **remove_duplicate_matches PARAMS((char **))(char **);
113static void insert_match PARAMS((char *, int, int, char *))(char *, int, int, char *);
114static int append_to_match PARAMS((char *, int, int, int))(char *, int, int, int);
115static void insert_all_matches PARAMS((char **, int, char *))(char **, int, char *);
116static void display_matches PARAMS((char **))(char **);
117static int compute_lcd_of_matches PARAMS((char **, int, const char *))(char **, int, const char *);
118static int postprocess_matches PARAMS((char ***, int))(char ***, int);

120static char *make_quoted_replacement PARAMS((char *, int, char *))(char *, int, char *);

122/* **************************************************************** */
123/*								    */
124/*	Completion matching, from readline's point of view.	    */
125/*								    */
126/* **************************************************************** */

128/* Variables known only to the readline library. */

130/* If non-zero, non-unique completions always show the list of matches. */
131int _rl_complete_show_all = 0;

133/* If non-zero, completed directory names have a slash appended. */
134int _rl_complete_mark_directories = 1;

136/* 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. */
140int _rl_complete_mark_symlink_dirs = 0;

142/* If non-zero, completions are printed horizontally in alphabetical order,
 like `ls -x'. */
144int _rl_print_completions_horizontally;

146/* Non-zero means that case is not significant in filename completion. */
147#if defined (__MSDOS__) && !defined (__DJGPP__)
148int _rl_completion_case_fold = 1;
149#else
150int _rl_completion_case_fold;
151#endif

153/* If non-zero, don't match hidden files (filenames beginning with a `.' on
 Unix) when doing filename completion. */
155int _rl_match_hidden_files = 1;

157/* Global variables available to applications using readline. */

159#if defined (VISIBLE_STATS)
160/* 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. */
163int rl_visible_stats = 0;
164#endif /* VISIBLE_STATS */

166/* 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. */
169rl_icppfunc_t *rl_directory_completion_hook = (rl_icppfunc_t *)NULL((void *)0);

171rl_icppfunc_t *rl_directory_rewrite_hook = (rl_icppfunc_t *)NULL((void *)0);

173/* Non-zero means readline completion functions perform tilde expansion. */
174int rl_complete_with_tilde_expansion = 0;

176/* Pointer to the generator function for completion_matches ().
 NULL means to use rl_filename_completion_function (), the default filename
 completer. */
179rl_compentry_func_t *rl_completion_entry_function = (rl_compentry_func_t *)NULL((void *)0);

181/* 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. */
188rl_completion_func_t *rl_attempted_completion_function = (rl_completion_func_t *)NULL((void *)0);

190/* Non-zero means to suppress normal filename completion after the
 user-specified completion function has been called. */
192int rl_attempted_completion_over = 0;

194/* Set to a character indicating the type of completion being performed
 by rl_complete_internal, available for use by application completion
 functions. */
197int rl_completion_type = 0;

199/* 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. */
202int rl_completion_query_items = 100;

204int _rl_page_completions = 1;

206/* 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\"\\'`@$><=" */
209const char *rl_basic_word_break_characters = " \t\n\"\\'`@$><=;|&{("; /* }) */

211/* List of basic quoting characters. */
212const char *rl_basic_quote_characters = "\"'";

214/* 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.  */
217const char *rl_completer_word_break_characters = (const char *)NULL((void *)0);

219/* 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. */
223const char *rl_completer_quote_characters = (const char *)NULL((void *)0);

225/* List of characters that should be quoted in filenames by the completer. */
226const char *rl_filename_quote_characters = (const char *)NULL((void *)0);

228/* 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. */
231const char *rl_special_prefixes = (const char *)NULL((void *)0);

233/* If non-zero, then disallow duplicates in the matches. */
234int rl_ignore_completion_duplicates = 1;

236/* 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. */
239int rl_filename_completion_desired = 0;

241/* 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. */
246int rl_filename_quoting_desired = 1;

248/* 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. */
257rl_compignore_func_t *rl_ignore_some_completions_function = (rl_compignore_func_t *)NULL((void *)0);

259/* 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. */
263rl_quote_func_t *rl_filename_quoting_function = rl_quote_filename;

265/* 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. */
269rl_dequote_func_t *rl_filename_dequoting_function = (rl_dequote_func_t *)NULL((void *)0);

271/* 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. */
274rl_linebuf_func_t *rl_char_is_quoted_p = (rl_linebuf_func_t *)NULL((void *)0);

276/* 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. */
279int rl_completion_suppress_append = 0;

281/* Character appended to completed words when at the end of the line.  The
 default is a space. */
283int rl_completion_append_character = ' ';

285/* 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. */
294int rl_completion_mark_symlink_dirs;

296/* If non-zero, inhibit completion (temporarily). */
297int rl_inhibit_completion;

299/* Variables local to this file. */

301/* Local variable states what happened during the last completion attempt. */
302static int completion_changed_buffer;

304/*************************************/
305/*				     */
306/*    Bindable completion functions  */
307/*				     */
308/*************************************/

310/* 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. */
313int
314rl_complete (ignore, invoking_key)
   int ignore, invoking_key;
316{
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
  return (rl_complete_internal (TAB'\t'));
325}

327/* List the possible completions.  See description of rl_complete (). */
328int
329rl_possible_completions (ignore, invoking_key)
   int ignore, invoking_key;
331{
return (rl_complete_internal ('?'));
333}

335int
336rl_insert_completions (ignore, invoking_key)
   int ignore, invoking_key;
338{
return (rl_complete_internal ('*'));
340}

342/* 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. */
347int
348rl_completion_mode (cfunc)
   rl_command_func_t *cfunc;
350{
if (rl_last_func == cfunc && !completion_changed_buffer)
  return '?';
else if (_rl_complete_show_all)
  return '!';
else
  return TAB'\t';
357}

359/************************************/
360/*				    */
361/*    Completion utility functions  */
362/*				    */
363/************************************/

365/* Set default values for readline word completion.  These are the variables
 that application completion functions can change or inspect. */
367static void
368set_completion_defaults (what_to_do)
   int what_to_do;
370{
/* 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 = 0;

/* The completion entry function may optionally change this. */
rl_completion_mark_symlink_dirs = _rl_complete_mark_symlink_dirs;
379}

381/* The user must press "y" or "n". Non-zero return means "y" pressed. */
382static int
383get_y_or_n (for_pager)
   int for_pager;
385{
int c;

for (;;)
  {
    RL_SETSTATE(RL_STATE_MOREINPUT)(rl_readline_state |= (0x00040));
    c = rl_read_key ();
    RL_UNSETSTATE(RL_STATE_MOREINPUT)(rl_readline_state &= ~(0x00040));

    if (c == 'y' || c == 'Y' || c == ' ')
return (1);
    if (c == 'n' || c == 'N' || c == RUBOUT0x7f)
return (0);
    if (c == ABORT_CHAR(('G') & 0x1f))
_rl_abort_internal ();
    if (for_pager && (c == NEWLINE'\n' || c == RETURN(('M') & 0x1f)))
return (2);
    if (for_pager && (c == 'q' || c == 'Q'))
return (0);
    rl_ding ();
  }
406}

408static int
409_rl_internal_pager (lines)
   int lines;
411{
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;
424}

426#if defined (VISIBLE_STATS)
427/* 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 */
435static int
436stat_char (filename)
   char *filename;
438{
struct stat finfo;
int character, r;

442#if defined (HAVE_LSTAT1) && defined (S_ISLNK)
r = lstat (filename, &finfo);
444#else
r = stat (filename, &finfo);
446#endif

if (r == -1)
  return (0);

character = 0;
if (S_ISDIR (finfo.st_mode)((finfo.st_mode & 0170000) == 0040000))
  character = '/';
454#if defined (S_ISCHR)
else if (S_ISCHR (finfo.st_mode)((finfo.st_mode & 0170000) == 0020000))
  character = '%';
457#endif /* S_ISCHR */
458#if defined (S_ISBLK)
else if (S_ISBLK (finfo.st_mode)((finfo.st_mode & 0170000) == 0060000))
  character = '#';
461#endif /* S_ISBLK */
462#if defined (S_ISLNK)
else if (S_ISLNK (finfo.st_mode)((finfo.st_mode & 0170000) == 0120000))
  character = '@';
465#endif /* S_ISLNK */
466#if defined (S_ISSOCK)
else if (S_ISSOCK (finfo.st_mode)((finfo.st_mode & 0170000) == 0140000))
  character = '=';
469#endif /* S_ISSOCK */
470#if defined (S_ISFIFO)
else if (S_ISFIFO (finfo.st_mode)((finfo.st_mode & 0170000) == 0010000))
  character = '|';
473#endif
else if (S_ISREG (finfo.st_mode)((finfo.st_mode & 0170000) == 0100000))
  {
    if (access (filename, X_OK0x01) == 0)
character = '*';
  }
return (character);
480}
481#endif /* VISIBLE_STATS */

483/* 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. */
491static char *
492printable_part (pathname)
    char *pathname;
494{
char *temp, *x;

if (rl_filename_completion_desired == 0)	/* don't need to do anything */
  return (pathname);

temp = strrchr (pathname, '/');
501#if defined (__MSDOS__)
if (temp == 0 && ISALPHA ((unsigned char)pathname[0])(isascii((unsigned char)pathname[0]) && isalpha ((unsigned
 char)pathname[0])) && pathname[1] == ':')
  temp = pathname + 1;
504#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;
521}

523/* 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. */

527#define PUTX(c)do { if (((c) < 0x020 && (((c) & 0x80) == 0)))
 { (!__isthreaded ? __sputc('^', rl_outstream) : (putc)('^', rl_outstream
)); (!__isthreaded ? __sputc(((((unsigned char)(((c)|0x40)) ==
 (((c)|0x40))) && (isascii(((c)|0x40)) && islower
 (((c)|0x40)))) ? toupper((unsigned char)((c)|0x40)) : (((c)|
0x40))), rl_outstream) : (putc)(((((unsigned char)(((c)|0x40)
) == (((c)|0x40))) && (isascii(((c)|0x40)) &&
 islower (((c)|0x40)))) ? toupper((unsigned char)((c)|0x40)) :
 (((c)|0x40))), rl_outstream)); printed_len += 2; } else if (
c == 0x7f) { (!__isthreaded ? __sputc('^', rl_outstream) : (putc
)('^', rl_outstream)); (!__isthreaded ? __sputc('?', rl_outstream
) : (putc)('?', rl_outstream)); printed_len += 2; } else { (!
__isthreaded ? __sputc(c, rl_outstream) : (putc)(c, rl_outstream
)); printed_len++; } } while (0) \
  do { \
    if (CTRL_CHAR (c)((c) < 0x020 && (((c) & 0x80) == 0))) \
      { \
        putc ('^', rl_outstream)(!__isthreaded ? __sputc('^', rl_outstream) : (putc)('^', rl_outstream
)); \
        putc (UNCTRL (c), rl_outstream)(!__isthreaded ? __sputc(((((unsigned char)(((c)|0x40)) == ((
(c)|0x40))) && (isascii(((c)|0x40)) && islower
 (((c)|0x40)))) ? toupper((unsigned char)((c)|0x40)) : (((c)|
0x40))), rl_outstream) : (putc)(((((unsigned char)(((c)|0x40)
) == (((c)|0x40))) && (isascii(((c)|0x40)) &&
 islower (((c)|0x40)))) ? toupper((unsigned char)((c)|0x40)) :
 (((c)|0x40))), rl_outstream)); \
        printed_len += 2; \
      } \
    else if (c == RUBOUT0x7f) \
{ \
 putc ('^', rl_outstream)(!__isthreaded ? __sputc('^', rl_outstream) : (putc)('^', rl_outstream
)); \
 putc ('?', rl_outstream)(!__isthreaded ? __sputc('?', rl_outstream) : (putc)('?', rl_outstream
)); \
 printed_len += 2; \
} \
    else \
{ \
 putc (c, rl_outstream)(!__isthreaded ? __sputc(c, rl_outstream) : (putc)(c, rl_outstream
)); \
 printed_len++; \
} \
  } while (0)

548static int
549print_filename (to_print, full_pathname)
   char *to_print, *full_pathname;
551{
int printed_len = 0;
553#if !defined (VISIBLE_STATS)
char *s;

for (s = to_print; *s; s++)
  {
    PUTX (*s)do { if (((*s) < 0x020 && (((*s) & 0x80) == 0)
)) { (!__isthreaded ? __sputc('^', rl_outstream) : (putc)('^'
, rl_outstream)); (!__isthreaded ? __sputc(((((unsigned char)
(((*s)|0x40)) == (((*s)|0x40))) && (isascii(((*s)|0x40
)) && islower (((*s)|0x40)))) ? toupper((unsigned char
)((*s)|0x40)) : (((*s)|0x40))), rl_outstream) : (putc)(((((unsigned
 char)(((*s)|0x40)) == (((*s)|0x40))) && (isascii(((*
s)|0x40)) && islower (((*s)|0x40)))) ? toupper((unsigned
 char)((*s)|0x40)) : (((*s)|0x40))), rl_outstream)); printed_len
 += 2; } else if (*s == 0x7f) { (!__isthreaded ? __sputc('^',
 rl_outstream) : (putc)('^', rl_outstream)); (!__isthreaded ?
 __sputc('?', rl_outstream) : (putc)('?', rl_outstream)); printed_len
 += 2; } else { (!__isthreaded ? __sputc(*s, rl_outstream) : (
putc)(*s, rl_outstream)); printed_len++; } } while (0);
  }
560#else
char *s, c, *new_full_pathname;
int extension_char;

for (s = to_print; *s; s++)
  {
    PUTX (*s)do { if (((*s) < 0x020 && (((*s) & 0x80) == 0)
)) { (!__isthreaded ? __sputc('^', rl_outstream) : (putc)('^'
, rl_outstream)); (!__isthreaded ? __sputc(((((unsigned char)
(((*s)|0x40)) == (((*s)|0x40))) && (isascii(((*s)|0x40
)) && islower (((*s)|0x40)))) ? toupper((unsigned char
)((*s)|0x40)) : (((*s)|0x40))), rl_outstream) : (putc)(((((unsigned
 char)(((*s)|0x40)) == (((*s)|0x40))) && (isascii(((*
s)|0x40)) && islower (((*s)|0x40)))) ? toupper((unsigned
 char)((*s)|0x40)) : (((*s)|0x40))), rl_outstream)); printed_len
 += 2; } else if (*s == 0x7f) { (!__isthreaded ? __sputc('^',
 rl_outstream) : (putc)('^', rl_outstream)); (!__isthreaded ?
 __sputc('?', rl_outstream) : (putc)('?', rl_outstream)); printed_len
 += 2; } else { (!__isthreaded ? __sputc(*s, rl_outstream) : (
putc)(*s, rl_outstream)); printed_len++; } } while (0);
  }

if (rl_filename_completion_desired && rl_visible_stats)
  {
    /* 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 `/'. */
 s = tilde_expand (full_pathname && *full_pathname ? full_pathname : "/");
 if (rl_directory_completion_hook)
   (*rl_directory_completion_hook) (&s);
 if (asprintf(&new_full_pathname, "%s/%s", s, to_print) == -1)
  memory_error_and_abort("asprintf");
 extension_char = stat_char (new_full_pathname);
 free (new_full_pathname);
 to_print[-1] = c;
}
    else
{
 s = tilde_expand (full_pathname);
 extension_char = stat_char (s);
}

    free (s);
    if (extension_char)
{
 putc (extension_char, rl_outstream)(!__isthreaded ? __sputc(extension_char, rl_outstream) : (putc
)(extension_char, rl_outstream));
 printed_len++;
}
  }
607#endif /* VISIBLE_STATS */
return printed_len;
609}

611static char *
612rl_quote_filename (s, rtype, qcp)
   char *s;
   int rtype;
   char *qcp;
616{
char *r;
int len = strlen(s) + 2;

r = (char *)xmalloc (len);
*r = *rl_completer_quote_characters;
strlcpy (r + 1, s, len - 1);
if (qcp)
  *qcp = *rl_completer_quote_characters;
return r;
626}

628/* 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. */

643char
644_rl_find_completion_word (fp, dp)
   int *fp, *dp;
646{
int scan, end, found_quote, delimiter, pass_next, isbrk;
char quote_char;

end = rl_point;
found_quote = delimiter = 0;
quote_char = '\0';

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;
   }

 /* 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_BACKSLASH0x04;
     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_QUOTE0x01;
     else if (quote_char == '"')
found_quote |= RL_QF_DOUBLE_QUOTE0x02;
     else
found_quote |= RL_QF_OTHER_QUOTE0x08;
   }
}
  }

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. */
710#if defined (HANDLE_MULTIBYTE)
    while (rl_point = _rl_find_prev_mbchar (rl_line_buffer, rl_point, MB_FIND_ANY)(((rl_point) == 0) ? (rl_point) : ((rl_point) - 1)))
712#else
    while (--rl_point)
714#endif
{
 scan = rl_line_buffer[rl_point];

 if (strchr (rl_completer_word_break_characters, 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 (rl_completer_word_break_characters, scan) != 0;
    else
isbrk = strchr (rl_completer_word_break_characters, 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);
772}

774static char **
775gen_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;
780{
char **matches, *temp;

/* 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 || rl_attempted_completion_over)
{
 rl_attempted_completion_over = 0;
 return (matches);
}
  }

/* Beware -- we're stripping the quotes here.  Do this only if we know
   we are doing filename completion and the application has defined a
   filename dequoting function. */
temp = (char *)NULL((void *)0);

if (found_quote && our_func == rl_filename_completion_function &&
    rl_filename_dequoting_function)
  {
    /* delete single and double quotes */
    temp = (*rl_filename_dequoting_function) (text, quote_char);
    text = temp;	/* not freeing text is not a memory leak */
  }

matches = rl_completion_matches (text, our_func);
FREE (temp)if (temp) free (temp);
return matches;
813}

815/* Filter out duplicates in MATCHES.  This frees up the strings in
 MATCHES. */
817static char **
818remove_duplicate_matches (matches)
   char **matches;
820{
char *lowest_common;
int i, j, newlen;
char dead_slot;
char **temp_array;

/* Sort the items. */
for (i = 0; matches[i]; i++)
14
←
Assuming pointer value is null→
15
←
Loop condition is false. Execution continues on line 832→
  ;

/* Sort the array without matches[0], since we need it to
   stay in place no matter what. */
if (i15.1
'i' is 0
)
16
←
Taking false branch→
  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])xstrdup(matches[0]);

for (i = newlen = 0; matches[i + 1]; i++)
17
←
The value 0 is assigned to 'i'→
18
←
Loop condition is true.  Entering loop body→
  {
    if (strcmp (matches[i], matches[i + 1]) == 0)
19
←
Null pointer passed as 1st argument to string comparison function
{
 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((void *)0);

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((void *)0);
  }
return (temp_array);
874}

876/* Find the common prefix of the list of matches, and put it into
 matches[0]. */
878static int
879compute_lcd_of_matches (match_list, matches, text)
   char **match_list;
   int matches;
   const char *text;
883{
register int i, c1, c2, si;
int low;		/* Count of max-matched characters. */
886#if defined (HANDLE_MULTIBYTE)
int v;
mbstate_t ps1, ps2;
wchar_t wc1, wc2;
890#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((void *)0);
    return 1;
  }

for (i = 1, low = 100000; i < matches; i++)
  {
904#if defined (HANDLE_MULTIBYTE)
    if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0)
{
 memset (&ps1, 0, sizeof (mbstate_t));
 memset (&ps2, 0, sizeof (mbstate_t));
}
910#endif
    if (_rl_completion_case_fold)
{
 for (si = 0;
      (c1 = _rl_to_lower(match_list[i][si])((((unsigned char)(match_list[i][si]) == (match_list[i][si]))
 && (isascii(match_list[i][si]) && isupper (match_list
[i][si]))) ? tolower((unsigned char)match_list[i][si]) : (match_list
[i][si]))) &&
      (c2 = _rl_to_lower(match_list[i + 1][si])((((unsigned char)(match_list[i + 1][si]) == (match_list[i + 1
][si])) && (isascii(match_list[i + 1][si]) &&
 isupper (match_list[i + 1][si]))) ? tolower((unsigned char)match_list
[i + 1][si]) : (match_list[i + 1][si])));
      si++)
917#if defined (HANDLE_MULTIBYTE)
   if (MB_CUR_MAX1 > 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
930#endif
   if (c1 != c2)
     break;
}
    else
{
 for (si = 0;
      (c1 = match_list[i][si]) &&
      (c2 = match_list[i + 1][si]);
      si++)
940#if defined (HANDLE_MULTIBYTE)
   if (MB_CUR_MAX1 > 1 && rl_byte_oriented == 0)
     {
mbstate_t 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
950#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] = strdup(text);
    if (match_list[0] == NULL((void *)0))
     memory_error_and_abort("strdup");
  }
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)
{
 /* 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);
}
    else
      strncpy (match_list[0], match_list[1], low);

    match_list[0][low] = '\0';
  }

return matches;
1005}

1007static int
1008postprocess_matches (matchesp, matching_filenames)
   char ***matchesp;
   int matching_filenames;
1011{
char *t, **matches, **temp_matches;
int nmatch, i;

matches = *matchesp;

if (matches9.1
'matches' is not equal to null
 == 0)
10
←
Taking false branch→
  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)
11
←
Assuming 'rl_ignore_completion_duplicates' is not equal to 0→
12
←
Taking true branch→
  {
    temp_matches = remove_duplicate_matches (matches);
13
←
Calling 'remove_duplicate_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)if (matches) 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)if (t) free (t);
   }
}
  }

*matchesp = matches;
return (1);
1061}

1063/* 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. */
1067void
1068rl_display_match_list (matches, len, max)
   char **matches;
   int len, max;
1071{
int count, limit, printed_len, lines;
int i, j, k, l;
char *temp;

/* 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)
  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]);

  if (j + 1 < limit)
    for (k = 0; k < max - printed_len; k++)
      putc (' ', rl_outstream)(!__isthreaded ? __sputc(' ', rl_outstream) : (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]);
 /* 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)(!__isthreaded ? __sputc(' ', rl_outstream) : (putc)(' ', rl_outstream
));
   }
}
    rl_crlf ();
  }
1159}

1161/* 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. */
1172static void
1173display_matches (matches)
   char **matches;
1175{
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]);
    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 = strlen (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 (len >= rl_completion_query_items)
  {
    rl_crlf ();
    fprintf (rl_outstream, "Display all %d possibilities? (y or n)", len);
    fflush (rl_outstream);
    if (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;
1238}

1240static char *
1241make_quoted_replacement (match, mtype, qc)
   char *match;
   int mtype;
   char *qc;	/* Pointer to quoting character, if any */
1245{
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)strpbrk((match),(rl_filename_quote_characters)) != 0)
	: 0;

    do_replace = should_quote ? mtype : NO_MATCH0;
    /* Quote the replacement, since we found an embedded
word break character in a potential match. */
    if (do_replace != NO_MATCH0 && rl_filename_quoting_function)
replacement = (*rl_filename_quoting_function) (match, do_replace, qc);
  }
return (replacement);
1283}

1285static void
1286insert_match (match, start, mtype, qc)
   char *match;
   int start, mtype;
   char *qc;
1290{
char *replacement;
char oqc;

oqc = qc ? *qc : '\0';
replacement = make_quoted_replacement (match, mtype, qc);

/* Now insert the match. */
if (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--;
    _rl_replace_text (replacement, start, rl_point - 1);
    if (replacement != match)
      free (replacement);
  }
1313}

1315/* 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). */
1326static int
1327append_to_match (text, delimiter, quote_char, nontrivial_match)
   char *text;
   int delimiter, quote_char, nontrivial_match;
1330{
char temp_string[4], *filename;
int temp_string_index, s;
struct stat finfo;

temp_string_index = 0;
if (quote_char && rl_point && 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)
? LSTATlstat (filename, &finfo)
: stat (filename, &finfo);
    if (s == 0 && S_ISDIR (finfo.st_mode)((finfo.st_mode & 0170000) == 0040000))
{
 if (_rl_complete_mark_directories)
   {
     /* 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 ("/");
   }
}
1365#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)((finfo.st_mode & 0170000) == 0120000) &&
      stat (filename, &finfo) == 0 && S_ISDIR (finfo.st_mode)((finfo.st_mode & 0170000) == 0040000))
;
1371#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);
1386}

1388static void
1389insert_all_matches (matches, point, qc)
   char **matches;
   int point;
   char *qc;
1393{
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_MATCH1, qc);
 rl_insert_text (rp);
 rl_insert_text (" ");
 if (rp != matches[i])
   free (rp);
}
  }
else
  {
    rp = make_quoted_replacement (matches[0], SINGLE_MATCH1, qc);
    rl_insert_text (rp);
    rl_insert_text (" ");
    if (rp != matches[0])
free (rp);
  }
rl_end_undo_group ();
1425}

1427void
1428_rl_free_match_list (matches)
   char **matches;
1430{
register int i;

if (matches == 0)
  return;

for (i = 0; matches[i]; i++)
  free (matches[i]);
free (matches);
1439}

1441/* 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. */
1448int
1449rl_complete_internal (what_to_do)
   int what_to_do;
1451{
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)(rl_readline_state |= (0x04000));

set_completion_defaults (what_to_do);

saved_line_buffer = rl_line_buffer ? savestring (rl_line_buffer)xstrdup(rl_line_buffer) : (char *)NULL((void *)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. */
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)if (saved_line_buffer) free (saved_line_buffer);
    completion_changed_buffer = 0;
    RL_UNSETSTATE(RL_STATE_COMPLETING)(rl_readline_state &= ~(0x04000));
    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)if (saved_line_buffer) free (saved_line_buffer);
    completion_changed_buffer = 0;
    RL_UNSETSTATE(RL_STATE_COMPLETING)(rl_readline_state &= ~(0x04000));
    return (0);
  }

switch (what_to_do)
  {
  case TAB'\t':
  case '!':
    /* Insert the first match with proper quoting. */
    if (*matches[0])
insert_match (matches[0], start, matches[1] ? MULT_MATCH2 : SINGLE_MATCH1, &quote_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 (rl_editing_mode != vi_mode0)
   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, &quote_char);
    break;

  case '?':
    display_matches (matches);
    break;

  default:
    fprintf (stderr(&__sF[2]), "\r\nreadline: bad value %d for what_to_do in rl_complete\n", what_to_do);
    rl_ding ();
    FREE (saved_line_buffer)if (saved_line_buffer) free (saved_line_buffer);
    RL_UNSETSTATE(RL_STATE_COMPLETING)(rl_readline_state &= ~(0x04000));
    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_readline_state &= ~(0x04000));
return 0;
1568}

1570/***************************************************************/
1571/*							       */
1572/*  Application-callable completion match generator functions  */
1573/*							       */
1574/***************************************************************/

1576/* 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.
*/
1588char **
1589rl_completion_matches (text, entry_function)
   const char *text;
   rl_compentry_func_t *entry_function;
1592{
/* 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((void *)0);

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((void *)0);
  }

/* 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((void *)0);
  }
return (match_list);
1630}

1632/* A completion function for usernames.
 TEXT contains a partial username preceded by a random
 character (usually `~').  */
1635char *
1636rl_username_completion_function (text, state)
   const char *text;
   int state;
1639{
1640#if defined (__WIN32__) || defined (__OPENNT)
return (char *)NULL((void *)0);
1642#else /* !__WIN32__ && !__OPENNT) */
static char *username = (char *)NULL((void *)0);
static struct passwd *entry;
static int namelen, first_char, first_char_loc;
char *value;

if (state == 0)
  {
    FREE (username)if (username) free (username);

    first_char = *text;
    first_char_loc = first_char == '~';

    username = savestring (&text[first_char_loc])xstrdup(&text[first_char_loc]);
    namelen = strlen (username);
    setpwent ();
  }

while ((entry = getpwent ()))
  {
    /* Null usernames should result in all users as possible completions. */
    if (namelen == 0 || (STREQN (username, entry->pw_name, namelen)(((namelen) == 0) ? (1) : ((username)[0] == (entry->pw_name
)[0]) && (strncmp ((username), (entry->pw_name), (
namelen)) == 0))))
break;
  }

if (entry == 0)
  {
    endpwent ();
    return ((char *)NULL((void *)0));
  }
else
  {
    int len = 2 + strlen(entry->pw_name);
    value = (char *)xmalloc (len);

    *value = *text;

    strlcpy (value + first_char_loc, entry->pw_name, len - first_char_loc);

    if (first_char == '~')
rl_filename_completion_desired = 1;

    return (value);
  }
1686#endif /* !__WIN32__ && !__OPENNT */
1687}

1689/* 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. */
1693char *
1694rl_filename_completion_function (text, state)
   const char *text;
   int state;
1697{
static DIR *directory = (DIR *)NULL((void *)0);
static char *filename = (char *)NULL((void *)0);
static char *dirname = (char *)NULL((void *)0);
static char *users_dirname = (char *)NULL((void *)0);
static int filename_len;
char *temp;
int dirlen;
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((void *)0);
}
    FREE (dirname)if (dirname) free (dirname);
    FREE (filename)if (filename) free (filename);
    FREE (users_dirname)if (users_dirname) free (users_dirname);

    filename = savestring (text)xstrdup(text);
    filename_len = strlen(filename) + 1;
    if (*text == 0)
text = ".";
    dirname = savestring (text)xstrdup(text);

    temp = strrchr (dirname, '/');

1729#if defined (__MSDOS__)
    /* special hack for //X/... */
    if (dirname[0] == '/' && dirname[1] == '/' && ISALPHA ((unsigned char)dirname[2])(isascii((unsigned char)dirname[2]) && isalpha ((unsigned
 char)dirname[2])) && dirname[3] == '/')
      temp = strrchr (dirname + 3, '/');
1733#endif

    if (temp)
{
 strlcpy (filename, ++temp, filename_len);
 *temp = '\0';
}
1740#if defined (__MSDOS__)
    /* searches from current directory on the drive */
    else if (ISALPHA ((unsigned char)dirname[0])(isascii((unsigned char)dirname[0]) && isalpha ((unsigned
 char)dirname[0])) && dirname[1] == ':')
      {
 /* XXX DOS strlcpy anyone? */
        strlcpy (filename, dirname + 2, filename_len);
        dirname[2] = '\0';
      }
1748#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)xstrdup(dirname);

    if (*dirname == '~')
{
 temp = tilde_expand (dirname);
 free (dirname);
 dirname = temp;
}

    if (rl_directory_rewrite_hook)
(*rl_directory_rewrite_hook) (&dirname);

    if (rl_directory_completion_hook && (*rl_directory_completion_hook) (&dirname))
{
 free (users_dirname);
 users_dirname = savestring (dirname)xstrdup(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. */

entry = (struct dirent *)NULL((void *)0);
while (directory && (entry = readdir (directory)))
  {
    /* 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)((entry->d_name)[0] == '.'))
   continue;

 if (entry->d_name[0] != '.' ||
      (entry->d_name[1] &&
 (entry->d_name[1] != '.' || entry->d_name[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 (entry->d_name[0])((((unsigned char)(entry->d_name[0]) == (entry->d_name[
0])) && (isascii(entry->d_name[0]) && isupper
 (entry->d_name[0]))) ? tolower((unsigned char)entry->d_name
[0]) : (entry->d_name[0])) == _rl_to_lower (filename[0])((((unsigned char)(filename[0]) == (filename[0])) && (
isascii(filename[0]) && isupper (filename[0]))) ? tolower
((unsigned char)filename[0]) : (filename[0]))) &&
  (((int)D_NAMLEN (entry)(strlen ((entry)->d_name))) >= filename_len) &&
  (_rl_strnicmpstrncasecmp (filename, entry->d_name, filename_len) == 0))
break;
   }
 else
   {
     if ((entry->d_name[0] == filename[0]) &&
  (((int)D_NAMLEN (entry)(strlen ((entry)->d_name))) >= filename_len) &&
  (strncmp (filename, entry->d_name, filename_len) == 0))
break;
   }
}
  }

if (entry == 0)
  {
    if (directory)
{
 closedir (directory);
 directory = (DIR *)NULL((void *)0);
}
    if (dirname)
{
 free (dirname);
 dirname = (char *)NULL((void *)0);
}
    if (filename)
{
 free (filename);
 filename = (char *)NULL((void *)0);
}
    if (users_dirname)
{
 free (users_dirname);
 users_dirname = (char *)NULL((void *)0);
}

    return (char *)NULL((void *)0);
  }
else
  {
    /* dirname && (strcmp (dirname, ".") != 0) */
    if (dirname && (dirname[0] != '.' || dirname[1]))
{
 int templen;
 if (rl_complete_with_tilde_expansion && *users_dirname == '~')
   {
     dirlen = strlen (dirname);
     templen = 2 + dirlen + D_NAMLEN (entry)(strlen ((entry)->d_name));
     temp = (char *)xmalloc (templen);
     strlcpy (temp, dirname, templen);
     /* 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);
     templen = 2 + dirlen + D_NAMLEN (entry)(strlen ((entry)->d_name));
     temp = (char *)xmalloc (templen);
     strlcpy (temp, users_dirname, templen);
     /* Make sure that temp has a trailing slash here. */
     if (users_dirname[dirlen - 1] != '/')
       {
  temp[dirlen++] = '/';
         temp[dirlen] = '\0';
       }
   }

 strlcat (temp, entry->d_name, templen);
}
    else
temp = savestring (entry->d_name)xstrdup(entry->d_name);

    return (temp);
  }
1893}

1895/* An initial implementation of a menu completion function a la tcsh.  The
 first time (if the last readline command was not rl_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_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. */
1904int
1905rl_menu_complete (count, ignore)
   int count, ignore;
1907{
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_menu_complete)
1
Assuming 'rl_last_func' is not equal to rl_menu_complete→
2
←
Taking true branch→
  {
    /* Clean up from previous call, if any. */
    FREE (orig_text)if (orig_text) free (orig_text);
3
←
Taking false branch→
    if (matches3.1
'matches' is null
)
4
←
Taking false branch→
_rl_free_match_list (matches);

    match_list_index = match_list_size = 0;
    matches = (char **)NULL((void *)0);

    /* Only the completion entry function can change these. */
    set_completion_defaults ('%');

    our_func = rl_completion_entry_function
5
←
Assuming 'rl_completion_entry_function' is null→
6
←
'?' condition is false→
	? 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)
7
←
Assuming 'rl_point' is 0→
8
←
Taking false branch→
/* 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 (matches8.1
'matches' is not equal to null
 == 0 || postprocess_matches (&matches, matching_filenames) == 0)
9
←
Calling 'postprocess_matches'→
{
 rl_ding ();
 FREE (matches)if (matches) free (matches);
 matches = (char **)0;
 FREE (orig_text)if (orig_text) free (orig_text);
 orig_text = (char *)0;
 completion_changed_buffer = 0;
        return (0);
}

    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. */
  }

/* 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)if (matches) free (matches);
    matches = (char **)0;
    completion_changed_buffer = 0;
    return (0);
  }

match_list_index = (match_list_index + count) % match_list_size;
if (match_list_index < 0)
  match_list_index += match_list_size;

if (match_list_index == 0 && match_list_size > 1)
  {
    rl_ding ();
    insert_match (orig_text, orig_start, MULT_MATCH2, &quote_char);
  }
else
  {
    insert_match (matches[match_list_index], orig_start, SINGLE_MATCH1, &quote_char);
    append_to_match (matches[match_list_index], delimiter, quote_char,
       strcmp (orig_text, matches[match_list_index]));
  }

completion_changed_buffer = 1;
return (0);
2008}