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| Current File : //usr/src/contrib/tcsh/sh.file.c |
/* $Header: /p/tcsh/cvsroot/tcsh/sh.file.c,v 3.37 2010/02/09 20:21:49 christos Exp $ */
/*
* sh.file.c: File completion for csh. This file is not used in tcsh.
*/
/*-
* Copyright (c) 1980, 1991 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "sh.h"
#include "ed.h"
RCSID("$tcsh: sh.file.c,v 3.37 2010/02/09 20:21:49 christos Exp $")
#if defined(FILEC) && defined(TIOCSTI)
/*
* Tenex style file name recognition, .. and more.
* History:
* Author: Ken Greer, Sept. 1975, CMU.
* Finally got around to adding to the Cshell., Ken Greer, Dec. 1981.
*/
#define ON 1
#define OFF 0
#ifndef TRUE
#define TRUE 1
#endif
#ifndef FALSE
#define FALSE 0
#endif
#define ESC CTL_ESC('\033')
typedef enum {
LIST, RECOGNIZE
} COMMAND;
static void setup_tty (int);
static void back_to_col_1 (void);
static void pushback (const Char *);
static int filetype (const Char *, const Char *);
static void print_by_column (const Char *, Char *[], size_t);
static Char *tilde (const Char *);
static void retype (void);
static void beep (void);
static void print_recognized_stuff (const Char *);
static void extract_dir_and_name (const Char *, Char **, const Char **);
static Char *getitem (DIR *, int);
static size_t tsearch (Char *, COMMAND, size_t);
static int compare (const void *, const void *);
static int recognize (Char **, Char *, size_t, size_t);
static int is_prefix (const Char *, const Char *);
static int is_suffix (const Char *, const Char *);
static int ignored (const Char *);
/*
* Put this here so the binary can be patched with adb to enable file
* completion by default. Filec controls completion, nobeep controls
* ringing the terminal bell on incomplete expansions.
*/
int filec = 0;
static void
setup_tty(int on)
{
#ifdef TERMIO
# ifdef POSIX
struct termios tchars;
# else
struct termio tchars;
# endif /* POSIX */
# ifdef POSIX
(void) tcgetattr(SHIN, &tchars);
# else
(void) ioctl(SHIN, TCGETA, (ioctl_t) &tchars);
# endif /* POSIX */
if (on) {
tchars.c_cc[VEOL] = ESC;
if (tchars.c_lflag & ICANON)
# ifdef POSIX
on = TCSADRAIN;
# else
on = TCSETA;
# endif /* POSIX */
else {
# ifdef POSIX
on = TCSAFLUSH;
# else
on = TCSETAF;
# endif /* POSIX */
tchars.c_lflag |= ICANON;
}
}
else {
tchars.c_cc[VEOL] = _POSIX_VDISABLE;
# ifdef POSIX
on = TCSADRAIN;
# else
on = TCSETA;
# endif /* POSIX */
}
# ifdef POSIX
(void) xtcsetattr(SHIN, on, &tchars);
# else
(void) ioctl(SHIN, on, (ioctl_t) &tchars);
# endif /* POSIX */
#else
struct sgttyb sgtty;
static struct tchars tchars;/* INT, QUIT, XON, XOFF, EOF, BRK */
if (on) {
(void) ioctl(SHIN, TIOCGETC, (ioctl_t) & tchars);
tchars.t_brkc = ESC;
(void) ioctl(SHIN, TIOCSETC, (ioctl_t) & tchars);
/*
* This must be done after every command: if the tty gets into raw or
* cbreak mode the user can't even type 'reset'.
*/
(void) ioctl(SHIN, TIOCGETP, (ioctl_t) & sgtty);
if (sgtty.sg_flags & (RAW | CBREAK)) {
sgtty.sg_flags &= ~(RAW | CBREAK);
(void) ioctl(SHIN, TIOCSETP, (ioctl_t) & sgtty);
}
}
else {
tchars.t_brkc = -1;
(void) ioctl(SHIN, TIOCSETC, (ioctl_t) & tchars);
}
#endif /* TERMIO */
}
/*
* Move back to beginning of current line
*/
static void
back_to_col_1(void)
{
#ifdef TERMIO
# ifdef POSIX
struct termios tty, tty_normal;
# else
struct termio tty, tty_normal;
# endif /* POSIX */
#else
struct sgttyb tty, tty_normal;
#endif /* TERMIO */
pintr_disabled++;
cleanup_push(&pintr_disabled, disabled_cleanup);
#ifdef TERMIO
# ifdef POSIX
(void) tcgetattr(SHOUT, &tty);
# else
(void) ioctl(SHOUT, TCGETA, (ioctl_t) &tty_normal);
# endif /* POSIX */
tty_normal = tty;
tty.c_iflag &= ~INLCR;
tty.c_oflag &= ~ONLCR;
# ifdef POSIX
(void) xtcsetattr(SHOUT, TCSANOW, &tty);
# else
(void) ioctl(SHOUT, TCSETAW, (ioctl_t) &tty);
# endif /* POSIX */
(void) xwrite(SHOUT, "\r", 1);
# ifdef POSIX
(void) xtcsetattr(SHOUT, TCSANOW, &tty_normal);
# else
(void) ioctl(SHOUT, TCSETAW, (ioctl_t) &tty_normal);
# endif /* POSIX */
#else
(void) ioctl(SHIN, TIOCGETP, (ioctl_t) & tty);
tty_normal = tty;
tty.sg_flags &= ~CRMOD;
(void) ioctl(SHIN, TIOCSETN, (ioctl_t) & tty);
(void) xwrite(SHOUT, "\r", 1);
(void) ioctl(SHIN, TIOCSETN, (ioctl_t) & tty_normal);
#endif /* TERMIO */
cleanup_until(&pintr_disabled);
}
/*
* Push string contents back into tty queue
*/
static void
pushback(const Char *string)
{
const Char *p;
#ifdef TERMIO
# ifdef POSIX
struct termios tty, tty_normal;
# else
struct termio tty, tty_normal;
# endif /* POSIX */
#else
struct sgttyb tty, tty_normal;
#endif /* TERMIO */
pintr_disabled++;
cleanup_push(&pintr_disabled, disabled_cleanup);
#ifdef TERMIO
# ifdef POSIX
(void) tcgetattr(SHOUT, &tty);
# else
(void) ioctl(SHOUT, TCSETAW, (ioctl_t) &tty);
# endif /* POSIX */
tty_normal = tty;
tty.c_lflag &= ~(ECHOKE | ECHO | ECHOE | ECHOK | ECHONL |
#ifndef __QNXNTO__
ECHOPRT |
#endif
ECHOCTL);
# ifdef POSIX
(void) xtcsetattr(SHOUT, TCSANOW, &tty);
# else
(void) ioctl(SHOUT, TCSETAW, (ioctl_t) &tty);
# endif /* POSIX */
for (p = string; *p != '\0'; p++) {
char buf[MB_LEN_MAX];
size_t i, len;
len = one_wctomb(buf, *p & CHAR);
for (i = 0; i < len; i++)
(void) ioctl(SHOUT, TIOCSTI, (ioctl_t) &buf[i]);
}
# ifdef POSIX
(void) xtcsetattr(SHOUT, TCSANOW, &tty_normal);
# else
(void) ioctl(SHOUT, TCSETAW, (ioctl_t) &tty_normal);
# endif /* POSIX */
#else
(void) ioctl(SHOUT, TIOCGETP, (ioctl_t) & tty);
tty_normal = tty;
tty.sg_flags &= ~ECHO;
(void) ioctl(SHOUT, TIOCSETN, (ioctl_t) & tty);
for (p = string; c = *p; p++)
(void) ioctl(SHOUT, TIOCSTI, (ioctl_t) & c);
(void) ioctl(SHOUT, TIOCSETN, (ioctl_t) & tty_normal);
#endif /* TERMIO */
cleanup_until(&pintr_disabled);
}
static int
filetype(const Char *dir, const Char *file)
{
Char *path;
char *spath;
struct stat statb;
path = Strspl(dir, file);
spath = short2str(path);
xfree(path);
if (lstat(spath, &statb) == 0) {
switch (statb.st_mode & S_IFMT) {
case S_IFDIR:
return ('/');
case S_IFLNK:
if (stat(spath, &statb) == 0 && /* follow it out */
S_ISDIR(statb.st_mode))
return ('>');
else
return ('@');
case S_IFSOCK:
return ('=');
default:
if (statb.st_mode & 0111)
return ('*');
}
}
return (' ');
}
/*
* Print sorted down columns
*/
static void
print_by_column(const Char *dir, Char *items[], size_t count)
{
struct winsize win;
size_t i;
int rows, r, c, maxwidth = 0, columns;
if (ioctl(SHOUT, TIOCGWINSZ, (ioctl_t) & win) < 0 || win.ws_col == 0)
win.ws_col = 80;
for (i = 0; i < count; i++)
maxwidth = maxwidth > (r = Strlen(items[i])) ? maxwidth : r;
maxwidth += 2; /* for the file tag and space */
columns = win.ws_col / maxwidth;
if (columns == 0)
columns = 1;
rows = (count + (columns - 1)) / columns;
for (r = 0; r < rows; r++) {
for (c = 0; c < columns; c++) {
i = c * rows + r;
if (i < count) {
int w;
xprintf("%S", items[i]);
xputchar(dir ? filetype(dir, items[i]) : ' ');
if (c < columns - 1) { /* last column? */
w = Strlen(items[i]) + 1;
for (; w < maxwidth; w++)
xputchar(' ');
}
}
}
xputchar('\r');
xputchar('\n');
}
}
/*
* Expand file name with possible tilde usage
* ~person/mumble
* expands to
* home_directory_of_person/mumble
*/
static Char *
tilde(const Char *old)
{
const Char *o, *home;
struct passwd *pw;
if (old[0] != '~')
return (Strsave(old));
old++;
for (o = old; *o != '\0' && *o != '/'; o++)
;
if (o == old)
home = varval(STRhome);
else {
Char *person;
person = Strnsave(old, o - old);
pw = xgetpwnam(short2str(person));
xfree(person);
if (pw == NULL)
return (NULL);
home = str2short(pw->pw_dir);
}
return Strspl(home, o);
}
/*
* Cause pending line to be printed
*/
static void
retype(void)
{
#ifdef TERMIO
# ifdef POSIX
struct termios tty;
(void) tcgetattr(SHOUT, &tty);
# else
struct termio tty;
(void) ioctl(SHOUT, TCGETA, (ioctl_t) &tty);
# endif /* POSIX */
#ifndef __QNXNTO__
tty.c_lflag |= PENDIN;
#endif
# ifdef POSIX
(void) xtcsetattr(SHOUT, TCSANOW, &tty);
# else
(void) ioctl(SHOUT, TCSETAW, (ioctl_t) &tty);
# endif /* POSIX */
#else
int pending_input = LPENDIN;
(void) ioctl(SHOUT, TIOCLBIS, (ioctl_t) & pending_input);
#endif /* TERMIO */
}
static void
beep(void)
{
if (adrof(STRnobeep) == 0)
#ifdef IS_ASCII
(void) xwrite(SHOUT, "\007", 1);
#else
{
unsigned char beep_ch = CTL_ESC('\007');
(void) xwrite(SHOUT, &beep_ch, 1);
}
#endif
}
/*
* Erase that silly ^[ and
* print the recognized part of the string
*/
static void
print_recognized_stuff(const Char *recognized_part)
{
/* An optimized erasing of that silly ^[ */
(void) putraw('\b');
(void) putraw('\b');
switch (Strlen(recognized_part)) {
case 0: /* erase two Characters: ^[ */
(void) putraw(' ');
(void) putraw(' ');
(void) putraw('\b');
(void) putraw('\b');
break;
case 1: /* overstrike the ^, erase the [ */
xprintf("%S", recognized_part);
(void) putraw(' ');
(void) putraw('\b');
break;
default: /* overstrike both Characters ^[ */
xprintf("%S", recognized_part);
break;
}
flush();
}
/*
* Parse full path in file into 2 parts: directory and file names
* Should leave final slash (/) at end of dir.
*/
static void
extract_dir_and_name(const Char *path, Char **dir, const Char **name)
{
const Char *p;
p = Strrchr(path, '/');
if (p == NULL)
p = path;
else
p++;
*name = p;
*dir = Strnsave(path, p - path);
}
static Char *
getitem(DIR *dir_fd, int looking_for_lognames)
{
struct passwd *pw;
struct dirent *dirp;
if (looking_for_lognames) {
#ifndef HAVE_GETPWENT
return (NULL);
#else
if ((pw = getpwent()) == NULL)
return (NULL);
return (str2short(pw->pw_name));
#endif /* atp vmsposix */
}
if ((dirp = readdir(dir_fd)) != NULL)
return (str2short(dirp->d_name));
return (NULL);
}
/*
* Perform a RECOGNIZE or LIST command on string "word".
*/
static size_t
tsearch(Char *word, COMMAND command, size_t max_word_length)
{
DIR *dir_fd;
int ignoring = TRUE, nignored = 0;
int looking_for_lognames;
Char *tilded_dir = NULL, *dir = NULL;
Char *extended_name = NULL;
const Char *name;
Char *item;
struct blk_buf items = BLK_BUF_INIT;
size_t name_length;
looking_for_lognames = (*word == '~') && (Strchr(word, '/') == NULL);
if (looking_for_lognames) {
#ifdef HAVE_GETPWENT
(void) setpwent();
#endif
name = word + 1; /* name sans ~ */
dir_fd = NULL;
cleanup_push(dir, xfree);
}
else {
extract_dir_and_name(word, &dir, &name);
cleanup_push(dir, xfree);
tilded_dir = tilde(dir);
if (tilded_dir == NULL)
goto end;
cleanup_push(tilded_dir, xfree);
dir_fd = opendir(*tilded_dir ? short2str(tilded_dir) : ".");
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 */