770 lines
18 KiB
C
770 lines
18 KiB
C
/* $Header: /p/tcsh/cvsroot/tcsh/sh.file.c,v 3.37 2010/02/09 20:21:49 christos Exp $ */
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/*
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* sh.file.c: File completion for csh. This file is not used in tcsh.
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*/
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/*-
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* Copyright (c) 1980, 1991 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "sh.h"
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#include "ed.h"
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RCSID("$tcsh: sh.file.c,v 3.37 2010/02/09 20:21:49 christos Exp $")
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#if defined(FILEC) && defined(TIOCSTI)
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/*
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* Tenex style file name recognition, .. and more.
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* History:
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* Author: Ken Greer, Sept. 1975, CMU.
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* Finally got around to adding to the Cshell., Ken Greer, Dec. 1981.
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*/
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#define ON 1
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#define OFF 0
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#ifndef TRUE
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#define TRUE 1
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#endif
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#ifndef FALSE
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#define FALSE 0
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#endif
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#define ESC CTL_ESC('\033')
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typedef enum {
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LIST, RECOGNIZE
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} COMMAND;
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static void setup_tty (int);
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static void back_to_col_1 (void);
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static void pushback (const Char *);
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static int filetype (const Char *, const Char *);
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static void print_by_column (const Char *, Char *[], size_t);
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static Char *tilde (const Char *);
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static void retype (void);
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static void beep (void);
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static void print_recognized_stuff (const Char *);
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static void extract_dir_and_name (const Char *, Char **, const Char **);
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static Char *getitem (DIR *, int);
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static size_t tsearch (Char *, COMMAND, size_t);
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static int compare (const void *, const void *);
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static int recognize (Char **, Char *, size_t, size_t);
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static int is_prefix (const Char *, const Char *);
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static int is_suffix (const Char *, const Char *);
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static int ignored (const Char *);
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/*
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* Put this here so the binary can be patched with adb to enable file
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* completion by default. Filec controls completion, nobeep controls
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* ringing the terminal bell on incomplete expansions.
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*/
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int filec = 0;
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static void
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setup_tty(int on)
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{
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#ifdef TERMIO
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# ifdef POSIX
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struct termios tchars;
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# else
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struct termio tchars;
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# endif /* POSIX */
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# ifdef POSIX
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(void) tcgetattr(SHIN, &tchars);
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# else
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(void) ioctl(SHIN, TCGETA, (ioctl_t) &tchars);
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# endif /* POSIX */
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if (on) {
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tchars.c_cc[VEOL] = ESC;
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if (tchars.c_lflag & ICANON)
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# ifdef POSIX
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on = TCSADRAIN;
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# else
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on = TCSETA;
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# endif /* POSIX */
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else {
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# ifdef POSIX
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on = TCSAFLUSH;
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# else
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on = TCSETAF;
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# endif /* POSIX */
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tchars.c_lflag |= ICANON;
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}
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}
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else {
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tchars.c_cc[VEOL] = _POSIX_VDISABLE;
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# ifdef POSIX
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on = TCSADRAIN;
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# else
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on = TCSETA;
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# endif /* POSIX */
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}
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# ifdef POSIX
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(void) xtcsetattr(SHIN, on, &tchars);
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# else
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(void) ioctl(SHIN, on, (ioctl_t) &tchars);
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# endif /* POSIX */
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#else
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struct sgttyb sgtty;
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static struct tchars tchars;/* INT, QUIT, XON, XOFF, EOF, BRK */
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if (on) {
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(void) ioctl(SHIN, TIOCGETC, (ioctl_t) & tchars);
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tchars.t_brkc = ESC;
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(void) ioctl(SHIN, TIOCSETC, (ioctl_t) & tchars);
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/*
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* This must be done after every command: if the tty gets into raw or
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* cbreak mode the user can't even type 'reset'.
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*/
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(void) ioctl(SHIN, TIOCGETP, (ioctl_t) & sgtty);
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if (sgtty.sg_flags & (RAW | CBREAK)) {
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sgtty.sg_flags &= ~(RAW | CBREAK);
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(void) ioctl(SHIN, TIOCSETP, (ioctl_t) & sgtty);
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}
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}
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else {
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tchars.t_brkc = -1;
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(void) ioctl(SHIN, TIOCSETC, (ioctl_t) & tchars);
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}
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#endif /* TERMIO */
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}
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/*
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* Move back to beginning of current line
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*/
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static void
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back_to_col_1(void)
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{
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#ifdef TERMIO
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# ifdef POSIX
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struct termios tty, tty_normal;
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# else
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struct termio tty, tty_normal;
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# endif /* POSIX */
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#else
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struct sgttyb tty, tty_normal;
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#endif /* TERMIO */
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pintr_disabled++;
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cleanup_push(&pintr_disabled, disabled_cleanup);
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#ifdef TERMIO
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# ifdef POSIX
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(void) tcgetattr(SHOUT, &tty);
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# else
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(void) ioctl(SHOUT, TCGETA, (ioctl_t) &tty_normal);
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# endif /* POSIX */
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tty_normal = tty;
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tty.c_iflag &= ~INLCR;
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tty.c_oflag &= ~ONLCR;
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# ifdef POSIX
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(void) xtcsetattr(SHOUT, TCSANOW, &tty);
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# else
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(void) ioctl(SHOUT, TCSETAW, (ioctl_t) &tty);
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# endif /* POSIX */
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(void) xwrite(SHOUT, "\r", 1);
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# ifdef POSIX
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(void) xtcsetattr(SHOUT, TCSANOW, &tty_normal);
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# else
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(void) ioctl(SHOUT, TCSETAW, (ioctl_t) &tty_normal);
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# endif /* POSIX */
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#else
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(void) ioctl(SHIN, TIOCGETP, (ioctl_t) & tty);
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tty_normal = tty;
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tty.sg_flags &= ~CRMOD;
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(void) ioctl(SHIN, TIOCSETN, (ioctl_t) & tty);
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(void) xwrite(SHOUT, "\r", 1);
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(void) ioctl(SHIN, TIOCSETN, (ioctl_t) & tty_normal);
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#endif /* TERMIO */
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cleanup_until(&pintr_disabled);
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}
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/*
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* Push string contents back into tty queue
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*/
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static void
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pushback(const Char *string)
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{
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const Char *p;
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#ifdef TERMIO
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# ifdef POSIX
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struct termios tty, tty_normal;
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# else
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struct termio tty, tty_normal;
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# endif /* POSIX */
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#else
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struct sgttyb tty, tty_normal;
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#endif /* TERMIO */
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pintr_disabled++;
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cleanup_push(&pintr_disabled, disabled_cleanup);
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#ifdef TERMIO
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# ifdef POSIX
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(void) tcgetattr(SHOUT, &tty);
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# else
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(void) ioctl(SHOUT, TCSETAW, (ioctl_t) &tty);
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# endif /* POSIX */
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tty_normal = tty;
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tty.c_lflag &= ~(ECHOKE | ECHO | ECHOE | ECHOK | ECHONL |
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#ifndef __QNXNTO__
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ECHOPRT |
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#endif
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ECHOCTL);
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# ifdef POSIX
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(void) xtcsetattr(SHOUT, TCSANOW, &tty);
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# else
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(void) ioctl(SHOUT, TCSETAW, (ioctl_t) &tty);
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# endif /* POSIX */
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for (p = string; *p != '\0'; p++) {
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char buf[MB_LEN_MAX];
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size_t i, len;
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len = one_wctomb(buf, *p & CHAR);
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for (i = 0; i < len; i++)
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(void) ioctl(SHOUT, TIOCSTI, (ioctl_t) &buf[i]);
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}
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# ifdef POSIX
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(void) xtcsetattr(SHOUT, TCSANOW, &tty_normal);
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# else
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(void) ioctl(SHOUT, TCSETAW, (ioctl_t) &tty_normal);
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# endif /* POSIX */
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#else
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(void) ioctl(SHOUT, TIOCGETP, (ioctl_t) & tty);
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tty_normal = tty;
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tty.sg_flags &= ~ECHO;
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(void) ioctl(SHOUT, TIOCSETN, (ioctl_t) & tty);
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for (p = string; c = *p; p++)
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(void) ioctl(SHOUT, TIOCSTI, (ioctl_t) & c);
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(void) ioctl(SHOUT, TIOCSETN, (ioctl_t) & tty_normal);
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#endif /* TERMIO */
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cleanup_until(&pintr_disabled);
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}
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static int
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filetype(const Char *dir, const Char *file)
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{
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Char *path;
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char *spath;
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struct stat statb;
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path = Strspl(dir, file);
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spath = short2str(path);
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xfree(path);
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if (lstat(spath, &statb) == 0) {
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switch (statb.st_mode & S_IFMT) {
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case S_IFDIR:
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return ('/');
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case S_IFLNK:
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if (stat(spath, &statb) == 0 && /* follow it out */
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S_ISDIR(statb.st_mode))
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return ('>');
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else
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return ('@');
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case S_IFSOCK:
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return ('=');
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default:
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if (statb.st_mode & 0111)
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return ('*');
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}
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}
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return (' ');
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}
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/*
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* Print sorted down columns
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*/
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static void
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print_by_column(const Char *dir, Char *items[], size_t count)
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{
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struct winsize win;
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size_t i;
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int rows, r, c, maxwidth = 0, columns;
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if (ioctl(SHOUT, TIOCGWINSZ, (ioctl_t) & win) < 0 || win.ws_col == 0)
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win.ws_col = 80;
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for (i = 0; i < count; i++)
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maxwidth = maxwidth > (r = Strlen(items[i])) ? maxwidth : r;
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maxwidth += 2; /* for the file tag and space */
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columns = win.ws_col / maxwidth;
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if (columns == 0)
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columns = 1;
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rows = (count + (columns - 1)) / columns;
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for (r = 0; r < rows; r++) {
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for (c = 0; c < columns; c++) {
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i = c * rows + r;
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if (i < count) {
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int w;
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xprintf("%S", items[i]);
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xputchar(dir ? filetype(dir, items[i]) : ' ');
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if (c < columns - 1) { /* last column? */
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w = Strlen(items[i]) + 1;
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for (; w < maxwidth; w++)
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xputchar(' ');
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}
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}
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}
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xputchar('\r');
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xputchar('\n');
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}
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}
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/*
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* Expand file name with possible tilde usage
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* ~person/mumble
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* expands to
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* home_directory_of_person/mumble
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*/
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static Char *
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tilde(const Char *old)
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{
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const Char *o, *home;
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struct passwd *pw;
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if (old[0] != '~')
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return (Strsave(old));
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old++;
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for (o = old; *o != '\0' && *o != '/'; o++)
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;
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if (o == old)
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home = varval(STRhome);
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else {
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Char *person;
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person = Strnsave(old, o - old);
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pw = xgetpwnam(short2str(person));
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xfree(person);
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if (pw == NULL)
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return (NULL);
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home = str2short(pw->pw_dir);
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}
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return Strspl(home, o);
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}
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/*
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* Cause pending line to be printed
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*/
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static void
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retype(void)
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{
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#ifdef TERMIO
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# ifdef POSIX
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struct termios tty;
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(void) tcgetattr(SHOUT, &tty);
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# else
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struct termio tty;
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(void) ioctl(SHOUT, TCGETA, (ioctl_t) &tty);
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# endif /* POSIX */
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#ifndef __QNXNTO__
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tty.c_lflag |= PENDIN;
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#endif
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# ifdef POSIX
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(void) xtcsetattr(SHOUT, TCSANOW, &tty);
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# else
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(void) ioctl(SHOUT, TCSETAW, (ioctl_t) &tty);
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# endif /* POSIX */
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#else
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int pending_input = LPENDIN;
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(void) ioctl(SHOUT, TIOCLBIS, (ioctl_t) & pending_input);
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#endif /* TERMIO */
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}
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static void
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beep(void)
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{
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if (adrof(STRnobeep) == 0)
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#ifdef IS_ASCII
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(void) xwrite(SHOUT, "\007", 1);
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#else
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{
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unsigned char beep_ch = CTL_ESC('\007');
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(void) xwrite(SHOUT, &beep_ch, 1);
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}
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#endif
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}
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/*
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* Erase that silly ^[ and
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* print the recognized part of the string
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*/
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static void
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print_recognized_stuff(const Char *recognized_part)
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{
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/* An optimized erasing of that silly ^[ */
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(void) putraw('\b');
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(void) putraw('\b');
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switch (Strlen(recognized_part)) {
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case 0: /* erase two Characters: ^[ */
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(void) putraw(' ');
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(void) putraw(' ');
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(void) putraw('\b');
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(void) putraw('\b');
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break;
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case 1: /* overstrike the ^, erase the [ */
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xprintf("%S", recognized_part);
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(void) putraw(' ');
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(void) putraw('\b');
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break;
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default: /* overstrike both Characters ^[ */
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xprintf("%S", recognized_part);
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break;
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}
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flush();
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}
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/*
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* Parse full path in file into 2 parts: directory and file names
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* Should leave final slash (/) at end of dir.
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*/
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static void
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extract_dir_and_name(const Char *path, Char **dir, const Char **name)
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{
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const Char *p;
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p = Strrchr(path, '/');
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if (p == NULL)
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p = path;
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else
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p++;
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*name = p;
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*dir = Strnsave(path, p - path);
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}
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static Char *
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getitem(DIR *dir_fd, int looking_for_lognames)
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{
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struct passwd *pw;
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struct dirent *dirp;
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if (looking_for_lognames) {
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#ifndef HAVE_GETPWENT
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return (NULL);
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#else
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if ((pw = getpwent()) == NULL)
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return (NULL);
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return (str2short(pw->pw_name));
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#endif /* atp vmsposix */
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}
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if ((dirp = readdir(dir_fd)) != NULL)
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return (str2short(dirp->d_name));
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return (NULL);
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}
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/*
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* Perform a RECOGNIZE or LIST command on string "word".
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*/
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static size_t
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tsearch(Char *word, COMMAND command, size_t max_word_length)
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{
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DIR *dir_fd;
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int ignoring = TRUE, nignored = 0;
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int looking_for_lognames;
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Char *tilded_dir = NULL, *dir = NULL;
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Char *extended_name = NULL;
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const Char *name;
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Char *item;
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struct blk_buf items = BLK_BUF_INIT;
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size_t name_length;
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looking_for_lognames = (*word == '~') && (Strchr(word, '/') == NULL);
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if (looking_for_lognames) {
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#ifdef HAVE_GETPWENT
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(void) setpwent();
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#endif
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name = word + 1; /* name sans ~ */
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dir_fd = NULL;
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cleanup_push(dir, xfree);
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}
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else {
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extract_dir_and_name(word, &dir, &name);
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cleanup_push(dir, xfree);
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tilded_dir = tilde(dir);
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if (tilded_dir == NULL)
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goto end;
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cleanup_push(tilded_dir, xfree);
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dir_fd = opendir(*tilded_dir ? short2str(tilded_dir) : ".");
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if (dir_fd == NULL)
|
|
goto end;
|
|
}
|
|
|
|
name_length = Strlen(name);
|
|
cleanup_push(&extended_name, xfree_indirect);
|
|
cleanup_push(&items, bb_cleanup);
|
|
again: /* search for matches */
|
|
while ((item = getitem(dir_fd, looking_for_lognames)) != NULL) {
|
|
if (!is_prefix(name, item))
|
|
continue;
|
|
/* Don't match . files on null prefix match */
|
|
if (name_length == 0 && item[0] == '.' &&
|
|
!looking_for_lognames)
|
|
continue;
|
|
if (command == LIST)
|
|
bb_append(&items, Strsave(item));
|
|
else { /* RECOGNIZE command */
|
|
if (ignoring && ignored(item))
|
|
nignored++;
|
|
else if (recognize(&extended_name, item, name_length, ++items.len))
|
|
break;
|
|
}
|
|
}
|
|
if (ignoring && items.len == 0 && nignored > 0) {
|
|
ignoring = FALSE;
|
|
nignored = 0;
|
|
if (looking_for_lognames) {
|
|
#ifdef HAVE_GETPWENT
|
|
(void) setpwent();
|
|
#endif /* atp vmsposix */
|
|
} else
|
|
rewinddir(dir_fd);
|
|
goto again;
|
|
}
|
|
|
|
if (looking_for_lognames) {
|
|
#ifndef HAVE_GETPWENT
|
|
(void) endpwent();
|
|
#endif
|
|
} else
|
|
xclosedir(dir_fd);
|
|
if (items.len != 0) {
|
|
if (command == RECOGNIZE) {
|
|
if (looking_for_lognames)
|
|
copyn(word, STRtilde, 2);/*FIXBUF, sort of */
|
|
else
|
|
/* put back dir part */
|
|
copyn(word, dir, max_word_length);/*FIXBUF*/
|
|
/* add extended name */
|
|
catn(word, extended_name, max_word_length);/*FIXBUF*/
|
|
}
|
|
else { /* LIST */
|
|
qsort(items.vec, items.len, sizeof(items.vec[0]), compare);
|
|
print_by_column(looking_for_lognames ? NULL : tilded_dir,
|
|
items.vec, items.len);
|
|
}
|
|
}
|
|
end:
|
|
cleanup_until(dir);
|
|
return items.len;
|
|
}
|
|
|
|
|
|
static int
|
|
compare(const void *p, const void *q)
|
|
{
|
|
#if defined (WIDE_STRINGS) && !defined (UTF16_STRING)
|
|
errno = 0;
|
|
|
|
return (wcscoll(*(Char *const *) p, *(Char *const *) q));
|
|
#else
|
|
char *p1, *q1;
|
|
int res;
|
|
|
|
p1 = strsave(short2str(*(Char *const *) p));
|
|
q1 = strsave(short2str(*(Char *const *) q));
|
|
# if defined(NLS) && defined(HAVE_STRCOLL)
|
|
res = strcoll(p1, q1);
|
|
# else
|
|
res = strcmp(p1, q1);
|
|
# endif /* NLS && HAVE_STRCOLL */
|
|
xfree (p1);
|
|
xfree (q1);
|
|
return res;
|
|
#endif /* not WIDE_STRINGS */
|
|
}
|
|
|
|
/*
|
|
* Object: extend what user typed up to an ambiguity.
|
|
* Algorithm:
|
|
* On first match, copy full item (assume it'll be the only match)
|
|
* On subsequent matches, shorten extended_name to the first
|
|
* Character mismatch between extended_name and item.
|
|
* If we shorten it back to the prefix length, stop searching.
|
|
*/
|
|
static int
|
|
recognize(Char **extended_name, Char *item, size_t name_length,
|
|
size_t numitems)
|
|
{
|
|
if (numitems == 1) /* 1st match */
|
|
*extended_name = Strsave(item);
|
|
else { /* 2nd & subsequent matches */
|
|
Char *x, *ent;
|
|
size_t len = 0;
|
|
|
|
x = *extended_name;
|
|
for (ent = item; *x && *x == *ent++; x++, len++);
|
|
*x = '\0'; /* Shorten at 1st Char diff */
|
|
if (len == name_length) /* Ambiguous to prefix? */
|
|
return (-1); /* So stop now and save time */
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Return true if check matches initial Chars in template.
|
|
* This differs from PWB imatch in that if check is null
|
|
* it matches anything.
|
|
*/
|
|
static int
|
|
is_prefix(const Char *check, const Char *template)
|
|
{
|
|
do
|
|
if (*check == 0)
|
|
return (TRUE);
|
|
while (*check++ == *template++);
|
|
return (FALSE);
|
|
}
|
|
|
|
/*
|
|
* Return true if the Chars in template appear at the
|
|
* end of check, I.e., are it's suffix.
|
|
*/
|
|
static int
|
|
is_suffix(const Char *check, const Char *template)
|
|
{
|
|
const Char *c, *t;
|
|
|
|
for (c = check; *c++;);
|
|
for (t = template; *t++;);
|
|
for (;;) {
|
|
if (t == template)
|
|
return 1;
|
|
if (c == check || *--t != *--c)
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static void
|
|
setup_tty_cleanup(void *dummy)
|
|
{
|
|
USE(dummy);
|
|
setup_tty(OFF);
|
|
}
|
|
|
|
size_t
|
|
tenex(Char *inputline, size_t inputline_size)
|
|
{
|
|
size_t numitems;
|
|
ssize_t num_read;
|
|
char tinputline[BUFSIZE + 1];/*FIXBUF*/
|
|
|
|
setup_tty(ON);
|
|
cleanup_push(&num_read, setup_tty_cleanup); /* num_read is only a marker */
|
|
|
|
while ((num_read = xread(SHIN, tinputline, BUFSIZE)) > 0) {/*FIXBUF*/
|
|
static const Char delims[] = {' ', '\'', '"', '\t', ';', '&', '<',
|
|
'>', '(', ')', '|', '^', '%', '\0'};
|
|
Char *str_end, *word_start, last_Char, should_retype;
|
|
size_t space_left;
|
|
COMMAND command;
|
|
|
|
tinputline[num_read] = 0;
|
|
Strcpy(inputline, str2short(tinputline));/*FIXBUF*/
|
|
num_read = Strlen(inputline);
|
|
last_Char = CTL_ESC(ASC(inputline[num_read - 1]) & ASCII);
|
|
|
|
if (last_Char == '\n' || (size_t)num_read == inputline_size)
|
|
break;
|
|
command = (last_Char == ESC) ? RECOGNIZE : LIST;
|
|
if (command == LIST)
|
|
xputchar('\n');
|
|
str_end = &inputline[num_read];
|
|
if (last_Char == ESC)
|
|
--str_end; /* wipeout trailing cmd Char */
|
|
*str_end = '\0';
|
|
/*
|
|
* Find LAST occurence of a delimiter in the inputline. The word start
|
|
* is one Character past it.
|
|
*/
|
|
for (word_start = str_end; word_start > inputline; --word_start)
|
|
if (Strchr(delims, word_start[-1]))
|
|
break;
|
|
space_left = inputline_size - (word_start - inputline) - 1;
|
|
numitems = tsearch(word_start, command, space_left);
|
|
|
|
if (command == RECOGNIZE) {
|
|
/* print from str_end on */
|
|
print_recognized_stuff(str_end);
|
|
if (numitems != 1) /* Beep = No match/ambiguous */
|
|
beep();
|
|
}
|
|
|
|
/*
|
|
* Tabs in the input line cause trouble after a pushback. tty driver
|
|
* won't backspace over them because column positions are now
|
|
* incorrect. This is solved by retyping over current line.
|
|
*/
|
|
should_retype = FALSE;
|
|
if (Strchr(inputline, '\t')) { /* tab Char in input line? */
|
|
back_to_col_1();
|
|
should_retype = TRUE;
|
|
}
|
|
if (command == LIST) /* Always retype after a LIST */
|
|
should_retype = TRUE;
|
|
if (should_retype)
|
|
printprompt(0, NULL);
|
|
pushback(inputline);
|
|
if (should_retype)
|
|
retype();
|
|
}
|
|
cleanup_until(&num_read);
|
|
return (num_read);
|
|
}
|
|
|
|
static int
|
|
ignored(const Char *item)
|
|
{
|
|
struct varent *vp;
|
|
Char **cp;
|
|
|
|
if ((vp = adrof(STRfignore)) == NULL || (cp = vp->vec) == NULL)
|
|
return (FALSE);
|
|
for (; *cp != NULL; cp++)
|
|
if (is_suffix(item, *cp))
|
|
return (TRUE);
|
|
return (FALSE);
|
|
}
|
|
#endif /* FILEC && TIOCSTI */
|