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Some enhancements I've been working on over the weekend,

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-Erik
This commit is contained in:
Erik Andersen 2000-04-12 17:49:52 +00:00
parent a2685735b1
commit f0657d3229
9 changed files with 789 additions and 678 deletions
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2
busybox.def.h
View File

@ -187,7 +187,7 @@
//#define BB_FEATURE_SORT_REVERSE
//
// Enable command line editing in the shell
#define BB_FEATURE_SH_COMMAND_EDITING
//#define BB_FEATURE_SH_COMMAND_EDITING
//
// Enable tab completion in the shell (not yet working very well)
//#define BB_FEATURE_SH_TAB_COMPLETION

625
cmdedit.c
View File

@ -53,9 +53,10 @@ static struct history *his_front = NULL; /* First element in command line list *
static struct history *his_end = NULL; /* Last element in command line list */
static struct termio old_term, new_term; /* Current termio and the previous termio before starting ash */
static int cmdedit_termw = 80; /* actual terminal width */
static int cmdedit_scroll = 27; /* width of EOL scrolling region */
static int history_counter = 0; /* Number of commands in history list */
static int reset_term = 0; /* Set to true if the terminal needs to be reset upon exit */
char *parsenextc; /* copy of parsefile->nextc */
struct history {
char *s;
@ -63,85 +64,42 @@ struct history {
struct history *n;
};
#define xwrite write
/* Version of write which resumes after a signal is caught. */
int xwrite(int fd, char *buf, int nbytes)
void
cmdedit_setwidth(int w)
{
int ntry;
int i;
int n;
n = nbytes;
ntry = 0;
for (;;) {
i = write(fd, buf, n);
if (i > 0) {
if ((n -= i) <= 0)
return nbytes;
buf += i;
ntry = 0;
} else if (i == 0) {
if (++ntry > 10)
return nbytes - n;
} else if (errno != EINTR) {
return -1;
}
}
if (w > 20) {
cmdedit_termw = w;
cmdedit_scroll = w / 3;
} else {
errorMsg("\n*** Error: minimum screen width is 21\n");
}
}
/* Version of ioctl that retries after a signal is caught. */
int xioctl(int fd, unsigned long request, char *arg)
{
int i;
while ((i = ioctl(fd, request, arg)) == -1 && errno == EINTR);
return i;
}
void cmdedit_reset_term(void)
{
if (reset_term)
xioctl(fileno(stdin), TCSETA, (void *) &old_term);
ioctl(fileno(stdin), TCSETA, (void *) &old_term);
}
void prepareToDie(int sig)
void clean_up_and_die(int sig)
{
cmdedit_reset_term();
fprintf(stdout, "\n");
exit(TRUE);
}
/* Go to HOME position */
void input_home(int outputFd, int *cursor)
{ /* Command line input routines */
{
while (*cursor > 0) {
xwrite(outputFd, "\b", 1);
--*cursor;
}
}
void input_delete(int outputFd, int cursor)
{
int j = 0;
memmove(parsenextc + cursor, parsenextc + cursor + 1,
BUFSIZ - cursor - 1);
for (j = cursor; j < (BUFSIZ - 1); j++) {
if (!*(parsenextc + j))
break;
else
xwrite(outputFd, (parsenextc + j), 1);
}
xwrite(outputFd, " \b", 2);
while (j-- > cursor)
xwrite(outputFd, "\b", 1);
}
/* Go to END position */
void input_end(int outputFd, int *cursor, int len)
{
while (*cursor < len) {
@ -150,22 +108,22 @@ void input_end(int outputFd, int *cursor, int len)
}
}
void input_backspace(int outputFd, int *cursor, int *len)
/* Delete the char in back of the cursor */
void input_backspace(char* command, int outputFd, int *cursor, int *len)
{
int j = 0;
if (*cursor > 0) {
xwrite(outputFd, "\b \b", 3);
--*cursor;
memmove(parsenextc + *cursor, parsenextc + *cursor + 1,
memmove(command + *cursor, command + *cursor + 1,
BUFSIZ - *cursor + 1);
for (j = *cursor; j < (BUFSIZ - 1); j++) {
if (!*(parsenextc + j))
if (!*(command + j))
break;
else
xwrite(outputFd, (parsenextc + j), 1);
xwrite(outputFd, (command + j), 1);
}
xwrite(outputFd, " \b", 2);
@ -177,18 +135,61 @@ void input_backspace(int outputFd, int *cursor, int *len)
}
}
#ifdef BB_FEATURE_SH_TAB_COMPLETION
/* Delete the char in front of the cursor */
void input_delete(char* command, int outputFd, int cursor, int *len)
{
int j = 0;
char** username_completion_matches(char* command, int *num_matches)
if (cursor == *len)
return;
memmove(command + cursor, command + cursor + 1,
BUFSIZ - cursor - 1);
for (j = cursor; j < (BUFSIZ - 1); j++) {
if (!*(command + j))
break;
else
xwrite(outputFd, (command + j), 1);
}
xwrite(outputFd, " \b", 2);
while (j-- > cursor)
xwrite(outputFd, "\b", 1);
--*len;
}
/* Move forward one charactor */
void input_forward(int outputFd, int *cursor, int len)
{
if (*cursor < len) {
xwrite(outputFd, "\033[C", 3);
++*cursor;
}
}
/* Move back one charactor */
void input_backward(int outputFd, int *cursor)
{
if (*cursor > 0) {
xwrite(outputFd, "\033[D", 3);
--*cursor;
}
}
#ifdef BB_FEATURE_SH_TAB_COMPLETION
char** username_tab_completion(char* command, int *num_matches)
{
char **matches = (char **) NULL;
*num_matches=0;
fprintf(stderr, "\nin username_completion_matches\n");
fprintf(stderr, "\nin username_tab_completion\n");
return (matches);
}
#include <dirent.h>
char** find_path_executable_n_cwd_matches(char* command, int *num_matches)
char** exe_n_cwd_tab_completion(char* command, int *num_matches)
{
char *dirName;
char **matches = (char **) NULL;
@ -227,6 +228,170 @@ char** find_path_executable_n_cwd_matches(char* command, int *num_matches)
return (matches);
}
void input_tab(char* command, int outputFd, int *cursor, int *len)
{
/* Do TAB completion */
static int num_matches=0;
static char **matches = (char **) NULL;
int pos = cursor;
if (lastWasTab == FALSE) {
char *tmp, *tmp1, *matchBuf;
/* For now, we will not bother with trying to distinguish
* whether the cursor is in/at a command extression -- we
* will always try all possable matches. If you don't like
* that then feel free to fix it.
*/
/* Make a local copy of the string -- up
* to the position of the cursor */
matchBuf = (char *) calloc(BUFSIZ, sizeof(char));
strncpy(matchBuf, command, cursor);
tmp=matchBuf;
/* skip past any command seperator tokens */
while (*tmp && (tmp1=strpbrk(tmp, ";|&{(`")) != NULL) {
tmp=++tmp1;
/* skip any leading white space */
while (*tmp && isspace(*tmp))
++tmp;
}
/* skip any leading white space */
while (*tmp && isspace(*tmp))
++tmp;
/* Free up any memory already allocated */
if (matches) {
free(matches);
matches = (char **) NULL;
}
/* If the word starts with `~' and there is no slash in the word,
* then try completing this word as a username. */
/* FIXME -- this check is broken! */
if (*tmp == '~' && !strchr(tmp, '/'))
matches = username_tab_completion(tmp, &num_matches);
/* Try to match any executable in our path and everything
* in the current working directory that matches. */
if (!matches)
matches = exe_n_cwd_tab_completion(tmp, &num_matches);
/* Don't leak memory */
free( matchBuf);
/* Did we find exactly one match? */
if (matches && num_matches==1) {
/* write out the matched command */
strncpy(command+pos, matches[0]+pos, strlen(matches[0])-pos);
len=strlen(command);
cursor=len;
xwrite(outputFd, matches[0]+pos, strlen(matches[0])-pos);
break;
}
} else {
/* Ok -- the last char was a TAB. Since they
* just hit TAB again, print a list of all the
* available choices... */
if ( matches && num_matches>0 ) {
int i, col;
/* Go to the next line */
xwrite(outputFd, "\n", 1);
/* Print the list of matches */
for (i=0,col=0; i<num_matches; i++) {
char foo[17];
sprintf(foo, "%-14s ", matches[i]);
col += xwrite(outputFd, foo, strlen(foo));
if (col > 60 && matches[i+1] != NULL) {
xwrite(outputFd, "\n", 1);
col = 0;
}
}
/* Go to the next line */
xwrite(outputFd, "\n", 1);
/* Rewrite the prompt */
xwrite(outputFd, prompt, strlen(prompt));
/* Rewrite the command */
xwrite(outputFd, command, len);
/* Put the cursor back to where it used to be */
for (cursor=len; cursor > pos; cursor--)
xwrite(outputFd, "\b", 1);
}
}
}
#endif
void get_previous_history(struct history **hp, char* command)
{
free((*hp)->s);
(*hp)->s = strdup(command);
*hp = (*hp)->p;
}
void get_next_history(struct history **hp, char* command)
{
free((*hp)->s);
(*hp)->s = strdup(command);
*hp = (*hp)->n;
cmdedit_redraw( NULL, hp->s, -2, -2);
}
#if 0
/* prompt : if !=NULL, print the prompt
* command: the command line to be displayed
* where : where to display changes from.
* -1 for no change, -2 for new line
* cursor : desired location for the cursor.
* -1 for Beginning of line.
* -2 for End of Line,
*/
static void
cmdedit_redraw(char* prompt, char* command, int where, int cursor)
{
static char* last_command;
int cmdedit_width;
if (where == -2) {
/* Rewrite the prompt and clean up static variables */
xwrite(outputFd, "\n", 1);
if (prompt) {
strcpy(last_command, prompt);
xwrite(outputFd, prompt, strlen(prompt));
} else {
last_command[0] = '\0';
xwrite(outputFd, "# ", 2);
}
cmdedit_width = cmdedit_termw - cmdedit_strlen(prompt);
} else if (strcmp(command, last_command) != 0) {
strcpy(last_command, prompt);
}
/* erase old command from command line */
len = strlen(command)-strlen(last_command);
while (len>0)
input_backspace(command, outputFd, &cursor, &len);
input_home(outputFd, &cursor);
/* Rewrite the command */
xwrite(outputFd, command+where, len);
/* Put the where it is supposed to be */
for (cursor=len; cursor > where; cursor--)
xwrite(outputFd, "\b", 1);
/* write new command */
strcpy(command, hp->s);
len = strlen(hp->s);
xwrite(outputFd, command+where, len);
cursor = len;
}
#endif
/*
@ -245,12 +410,12 @@ char** find_path_executable_n_cwd_matches(char* command, int *num_matches)
* Furthermore, the "vi" command editing keys are not implemented.
*
* TODO: implement TAB command completion. :)
*
*/
extern int cmdedit_read_input(char* prompt, int inputFd, int outputFd,
char command[BUFSIZ])
extern void cmdedit_read_input(char* prompt, char command[BUFSIZ])
{
int inputFd=fileno(stdin);
int outputFd=fileno(stdout);
int nr = 0;
int len = 0;
int j = 0;
@ -262,297 +427,162 @@ extern int cmdedit_read_input(char* prompt, int inputFd, int outputFd,
struct history *hp = his_end;
memset(command, 0, sizeof(command));
parsenextc = command;
if (!reset_term) {
xioctl(inputFd, TCGETA, (void *) &old_term);
ioctl(inputFd, TCGETA, (void *) &old_term);
memcpy(&new_term, &old_term, sizeof(struct termio));
new_term.c_cc[VMIN] = 1;
new_term.c_cc[VTIME] = 0;
new_term.c_lflag &= ~ICANON; /* unbuffered input */
new_term.c_lflag &= ~ECHO;
xioctl(inputFd, TCSETA, (void *) &new_term);
reset_term = 1;
ioctl(inputFd, TCSETA, (void *) &new_term);
} else {
xioctl(inputFd, TCSETA, (void *) &new_term);
ioctl(inputFd, TCSETA, (void *) &new_term);
}
memset(parsenextc, 0, BUFSIZ);
memset(command, 0, BUFSIZ);
while (1) {
if ((ret = read(inputFd, &c, 1)) < 1)
return ret;
fprintf(stderr, "\n\nkey=%d (%c)\n\n", c, c);
/* Go to the next line */
xwrite(outputFd, "\n", 1);
/* Rewrite the prompt */
xwrite(outputFd, prompt, strlen(prompt));
/* Rewrite the command */
xwrite(outputFd, parsenextc, len);
return;
switch (c) {
case '\n':
case '\r':
/* Enter */
*(command + len++ + 1) = c;
xwrite(outputFd, &c, 1);
break_out = 1;
break;
case 1:
/* Control-a -- Beginning of line */
input_home(outputFd, &cursor);
case 2:
/* Control-b -- Move back one character */
input_backward(outputFd, &cursor);
break;
case 4:
/* Control-d -- Delete one character, or exit
* if the len=0 and no chars to delete */
if (len == 0) {
xwrite(outputFd, "exit", 4);
clean_up_and_die(0);
} else {
input_delete(command, outputFd, cursor, &len);
}
break;
case 5:
/* Control-e -- End of line */
input_end(outputFd, &cursor, len);
break;
case 2:
/* Control-b -- Move back one character */
if (cursor > 0) {
xwrite(outputFd, "\033[D", 3);
cursor--;
}
break;
case 6:
/* Control-f -- Move forward one character */
if (cursor < len) {
xwrite(outputFd, "\033[C", 3);
cursor++;
}
input_forward(outputFd, &cursor, len);
break;
case 4:
/* Control-d -- Delete one character */
if (cursor != len) {
input_delete(outputFd, cursor);
len--;
} else if (len == 0) {
prepareToDie(0);
exit(0);
}
break;
case 14:
/* Control-n -- Get next command */
if (hp && hp->n && hp->n->s) {
free(hp->s);
hp->s = strdup(parsenextc);
hp = hp->n;
goto hop;
}
break;
case 16:
/* Control-p -- Get previous command */
if (hp && hp->p) {
free(hp->s);
hp->s = strdup(parsenextc);
hp = hp->p;
goto hop;
}
case '\b':
case DEL:
/* control-h and DEL */
input_backspace(command, outputFd, &cursor, &len);
break;
case '\t':
#ifdef BB_FEATURE_SH_TAB_COMPLETION
{
/* Do TAB completion */
static int num_matches=0;
static char **matches = (char **) NULL;
int pos = cursor;
if (lastWasTab == FALSE) {
char *tmp, *tmp1, *matchBuf;
/* For now, we will not bother with trying to distinguish
* whether the cursor is in/at a command extression -- we
* will always try all possable matches. If you don't like
* that then feel free to fix it.
*/
/* Make a local copy of the string -- up
* to the position of the cursor */
matchBuf = (char *) calloc(BUFSIZ, sizeof(char));
strncpy(matchBuf, parsenextc, cursor);
tmp=matchBuf;
/* skip past any command seperator tokens */
while (*tmp && (tmp1=strpbrk(tmp, ";|&{(`")) != NULL) {
tmp=++tmp1;
/* skip any leading white space */
while (*tmp && isspace(*tmp))
++tmp;
}
/* skip any leading white space */
while (*tmp && isspace(*tmp))
++tmp;
/* Free up any memory already allocated */
if (matches) {
free(matches);
matches = (char **) NULL;
}
/* If the word starts with `~' and there is no slash in the word,
* then try completing this word as a username. */
/* FIXME -- this check is broken! */
if (*tmp == '~' && !strchr(tmp, '/'))
matches = username_completion_matches(tmp, &num_matches);
/* Try to match any executable in our path and everything
* in the current working directory that matches. */
if (!matches)
matches = find_path_executable_n_cwd_matches(tmp, &num_matches);
/* Don't leak memory */
free( matchBuf);
/* Did we find exactly one match? */
if (matches && num_matches==1) {
/* write out the matched command */
strncpy(parsenextc+pos, matches[0]+pos, strlen(matches[0])-pos);
len=strlen(parsenextc);
cursor=len;
xwrite(outputFd, matches[0]+pos, strlen(matches[0])-pos);
break;
}
} else {
/* Ok -- the last char was a TAB. Since they
* just hit TAB again, print a list of all the
* available choices... */
if ( matches && num_matches>0 ) {
int i, col;
/* Go to the next line */
xwrite(outputFd, "\n", 1);
/* Print the list of matches */
for (i=0,col=0; i<num_matches; i++) {
char foo[17];
sprintf(foo, "%-14s ", matches[i]);
col += xwrite(outputFd, foo, strlen(foo));
if (col > 60 && matches[i+1] != NULL) {
xwrite(outputFd, "\n", 1);
col = 0;
}
}
/* Go to the next line */
xwrite(outputFd, "\n", 1);
/* Rewrite the prompt */
xwrite(outputFd, prompt, strlen(prompt));
/* Rewrite the command */
xwrite(outputFd, parsenextc, len);
/* Put the cursor back to where it used to be */
for (cursor=len; cursor > pos; cursor--)
xwrite(outputFd, "\b", 1);
}
}
break;
}
#else
break;
input_tab(command, outputFd, &cursor, &len);
#endif
case '\b':
case DEL:
/* Backspace */
input_backspace(outputFd, &cursor, &len);
break;
case '\n':
/* Enter */
*(parsenextc + len++ + 1) = c;
xwrite(outputFd, &c, 1);
break_out = 1;
case 14:
/* Control-n -- Get next command in history */
if (hp && hp->n && hp->n->s) {
get_next_history(&hp, command);
goto rewrite_line;
} else {
xwrite(outputFd, "\007", 1);
}
break;
case 16:
/* Control-p -- Get previous command from history */
if (hp && hp->p) {
get_previous_history(&hp, command);
goto rewrite_line;
} else {
xwrite(outputFd, "\007", 1);
}
break;
case ESC:{
/* escape sequence follows */
if ((ret = read(inputFd, &c, 1)) < 1)
return ret;
return;
if (c == '[') { /* 91 */
if ((ret = read(inputFd, &c, 1)) < 1)
return ret;
return;
switch (c) {
case 'A':
/* Up Arrow -- Get previous command */
/* Up Arrow -- Get previous command from history */
if (hp && hp->p) {
free(hp->s);
hp->s = strdup(parsenextc);
hp = hp->p;
goto hop;
get_previous_history(&hp, command);
goto rewrite_line;
} else {
xwrite(outputFd, "\007", 1);
}
break;
case 'B':
/* Down Arrow -- Get next command */
/* Down Arrow -- Get next command in history */
if (hp && hp->n && hp->n->s) {
free(hp->s);
hp->s = strdup(parsenextc);
hp = hp->n;
goto hop;
get_next_history(&hp, command);
goto rewrite_line;
} else {
xwrite(outputFd, "\007", 1);
}
break;
/* This is where we rewrite the line
* using the selected history item */
hop:
len = strlen(parsenextc);
/* return to begining of line */
for (; cursor > 0; cursor--)
xwrite(outputFd, "\b", 1);
/* erase old command */
for (j = 0; j < len; j++)
xwrite(outputFd, " ", 1);
/* return to begining of line */
for (j = len; j > 0; j--)
xwrite(outputFd, "\b", 1);
memset(parsenextc, 0, BUFSIZ);
len = strlen(parsenextc);
/* Rewrite the line with the selected history item */
rewrite_line:
/* erase old command from command line */
len = strlen(command)-strlen(hp->s);
while (len>0)
input_backspace(command, outputFd, &cursor, &len);
input_home(outputFd, &cursor);
/* write new command */
strcpy(parsenextc, hp->s);
strcpy(command, hp->s);
len = strlen(hp->s);
xwrite(outputFd, parsenextc, len);
xwrite(outputFd, command, len);
cursor = len;
break;
case 'C':
/* Right Arrow -- Move forward one character */
if (cursor < len) {
xwrite(outputFd, "\033[C", 3);
cursor++;
}
input_forward(outputFd, &cursor, len);
break;
case 'D':
/* Left Arrow -- Move back one character */
if (cursor > 0) {
xwrite(outputFd, "\033[D", 3);
cursor--;
}
input_backward(outputFd, &cursor);
break;
case '3':
/* Delete */
if (cursor != len) {
input_delete(outputFd, cursor);
len--;
}
input_delete(command, outputFd, cursor, &len);
break;
//case '5': case '6': /* pgup/pgdown */
case '7':
/* rxvt home */
case '1':
/* Home (Ctrl-A) */
input_home(outputFd, &cursor);
break;
case '8':
/* rxvt END */
case '4':
/* End (Ctrl-E) */
input_end(outputFd, &cursor, len);
break;
default:
xwrite(outputFd, "\007", 1);
}
if (c == '1' || c == '3' || c == '4')
if ((ret = read(inputFd, &c, 1)) < 1)
return ret; /* read 126 (~) */
return; /* read 126 (~) */
}
if (c == 'O') {
/* 79 */
if ((ret = read(inputFd, &c, 1)) < 1)
return ret;
return;
switch (c) {
case 'H':
/* Home (xterm) */
@ -562,6 +592,8 @@ extern int cmdedit_read_input(char* prompt, int inputFd, int outputFd,
/* End (xterm) */
input_end(outputFd, &cursor, len);
break;
default:
xwrite(outputFd, "\007", 1);
}
}
c = 0;
@ -570,8 +602,9 @@ extern int cmdedit_read_input(char* prompt, int inputFd, int outputFd,
default: /* If it's regular input, do the normal thing */
if (!isprint(c)) /* Skip non-printable characters */
if (!isprint(c)) { /* Skip non-printable characters */
break;
}
if (len >= (BUFSIZ - 2)) /* Need to leave space for enter */
break;
@ -579,15 +612,15 @@ extern int cmdedit_read_input(char* prompt, int inputFd, int outputFd,
len++;
if (cursor == (len - 1)) { /* Append if at the end of the line */
*(parsenextc + cursor) = c;
*(command + cursor) = c;
} else { /* Insert otherwise */
memmove(parsenextc + cursor + 1, parsenextc + cursor,
memmove(command + cursor + 1, command + cursor,
len - cursor - 1);
*(parsenextc + cursor) = c;
*(command + cursor) = c;
for (j = cursor; j < len; j++)
xwrite(outputFd, parsenextc + j, 1);
xwrite(outputFd, command + j, 1);
for (; j > cursor; j--)
xwrite(outputFd, "\033[D", 3);
}
@ -606,12 +639,12 @@ extern int cmdedit_read_input(char* prompt, int inputFd, int outputFd,
}
nr = len + 1;
xioctl(inputFd, TCSETA, (void *) &old_term);
ioctl(inputFd, TCSETA, (void *) &old_term);
reset_term = 0;
/* Handle command history log */
if (*(parsenextc)) {
if (*(command)) {
struct history *h = his_end;
@ -621,7 +654,7 @@ extern int cmdedit_read_input(char* prompt, int inputFd, int outputFd,
h->n = malloc(sizeof(struct history));
h->p = NULL;
h->s = strdup(parsenextc);
h->s = strdup(command);
h->n->p = h;
h->n->n = NULL;
h->n->s = NULL;
@ -634,7 +667,7 @@ extern int cmdedit_read_input(char* prompt, int inputFd, int outputFd,
h->n->p = h;
h->n->n = NULL;
h->n->s = NULL;
h->s = strdup(parsenextc);
h->s = strdup(command);
his_end = h->n;
/* After max history, remove the oldest command */
@ -652,14 +685,14 @@ extern int cmdedit_read_input(char* prompt, int inputFd, int outputFd,
}
}
return nr;
return;
}
extern void cmdedit_init(void)
{
atexit(cmdedit_reset_term);
signal(SIGINT, prepareToDie);
signal(SIGQUIT, prepareToDie);
signal(SIGTERM, prepareToDie);
signal(SIGINT, clean_up_and_die);
signal(SIGQUIT, clean_up_and_die);
signal(SIGTERM, clean_up_and_die);
}
#endif /* BB_FEATURE_SH_COMMAND_EDITING */

46
cmdedit.h
View File

@ -1,17 +1,35 @@
/*
* Termios command line History and Editting for NetBSD sh (ash)
* Copyright (c) 1999
* Main code: Adam Rogoyski <rogoyski@cs.utexas.edu>
* Etc: Dave Cinege <dcinege@psychosis.com>
* Adjusted for busybox: Erik Andersen <andersee@debian.org>
*
* You may use this code as you wish, so long as the original author(s)
* are attributed in any redistributions of the source code.
* This code is 'as is' with no warranty.
* This code may safely be consumed by a BSD or GPL license.
*
#ifndef GETLINE_H
#define GETLINE_H
/* unix systems can #define POSIX to use termios, otherwise
* the bsd or sysv interface will be used
*/
extern int cmdedit_read_input(char* prompt, int inputFd, int outputFd, char command[BUFSIZ]);
extern void cmdedit_init(void);
#ifdef __STDC__
#include <stddef.h>
typedef size_t (*cmdedit_strwidth_proc)(char *);
void cmdedit_read_input(char* promptStr, char* command); /* read a line of input */
void cmdedit_setwidth(int); /* specify width of screen */
void cmdedit_histadd(char *); /* adds entries to hist */
void cmdedit_strwidth(cmdedit_strwidth_proc); /* to bind cmdedit_strlen */
extern int (*cmdedit_in_hook)(char *);
extern int (*cmdedit_out_hook)(char *);
extern int (*cmdedit_tab_hook)(char *, int, int *);
#else /* not __STDC__ */
void cmdedit_read_input(char* promptStr, char* command);
void cmdedit_setwidth();
void cmdedit_histadd();
void cmdedit_strwidth();
extern int (*cmdedit_in_hook)();
extern int (*cmdedit_out_hook)();
extern int (*cmdedit_tab_hook)();
#endif /* __STDC__ */
#endif /* GETLINE_H */

6
internal.h
View File

@ -220,12 +220,6 @@ extern pid_t* findPidByName( char* pidName);
extern void *xmalloc (size_t size);
extern int find_real_root_device_name(char* name);
#ifdef BB_FEATURE_SH_COMMAND_EDITING
#include <stdio.h>
extern int cmdedit_read_input(char* prompt, int inputFd, int outputFd, char command[BUFSIZ]);
extern void cmdedit_init(void);
#endif
#if defined BB_INIT || defined BB_SYSLOGD
extern int device_open(char *device, int mode);
#endif

39
lash.c
View File

@ -37,6 +37,9 @@
#include <sys/ioctl.h>
#include <sys/wait.h>
#include <unistd.h>
#ifdef BB_FEATURE_SH_COMMAND_EDITING
#include "cmdedit.h"
#endif
#define JOB_STATUS_FORMAT "[%d] %-22s %.40s\n"
@ -132,6 +135,16 @@ static const char shell_usage[] =
static char cwd[1024];
static char *prompt = "# ";
#ifdef BB_FEATURE_SH_COMMAND_EDITING
void win_changed(int sig)
{
struct winsize win = { 0, 0 };
ioctl(0, TIOCGWINSZ, &win);
if (win.ws_col > 0) {
cmdedit_setwidth( win.ws_col - 1);
}
}
#endif
/* built-in 'cd <path>' handler */
@ -398,7 +411,7 @@ static int getCommand(FILE * source, char *command)
fflush(stdout);
promptStr=(char*)malloc(sizeof(char)*(len+1));
sprintf(promptStr, "%s %s", cwd, prompt);
cmdedit_read_input(promptStr, fileno(stdin), fileno(stdout), command);
cmdedit_read_input(promptStr, command);
free( promptStr);
return 0;
#else
@ -696,7 +709,6 @@ static int parseCommand(char **commandPtr, struct job *job, int *isBg)
strcpy(job->text, *commandPtr);
} else {
/* This leaves any trailing spaces, which is a bit sloppy */
count = returnCommand - *commandPtr;
job->text = malloc(count + 1);
strncpy(job->text, *commandPtr, count);
@ -793,14 +805,12 @@ static int runCommand(struct job newJob, struct jobSet *jobList, int inBg)
if (inBg) {
/* we don't wait for background jobs to return -- append it
to the list of backgrounded jobs and leave it alone */
printf("[%d] %d\n", job->jobId,
newJob.progs[newJob.numProgs - 1].pid);
} else {
jobList->fg = job;
/* move the new process group into the foreground */
if (tcsetpgrp(0, newJob.pgrp))
perror("tcsetpgrp");
}
@ -938,29 +948,24 @@ int shell_main(int argc, char **argv)
/* initialize the cwd */
getcwd(cwd, sizeof(cwd));
#ifdef BB_FEATURE_SH_COMMAND_EDITING
signal(SIGWINCH, win_changed);
win_changed(0);
#endif
//if (argv[0] && argv[0][0] == '-') {
// shell_source("/etc/profile");
//}
if (argc < 2) {
fprintf(stdout, "\n\nBusyBox v%s (%s) Built-in shell\n", BB_VER,
BB_BT);
fprintf(stdout,
"Enter 'help' for a list of built-in commands.\n\n");
fprintf(stdout, "\n\nBusyBox v%s (%s) Built-in shell\n", BB_VER, BB_BT);
fprintf(stdout, "Enter 'help' for a list of built-in commands.\n\n");
} else {
input = fopen(argv[1], "r");
if (!input)
if (!input) {
fatalError("A: Couldn't open file '%s': %s\n", argv[1],
strerror(errno));
// else
// fatalError("Got it.\n");
//exit(shell_source(argv[1]));
/* Set terminal IO to canonical mode, and save old term settings. */
#ifdef BB_FEATURE_SH_COMMAND_EDITING
cmdedit_init();
#endif
}
}
return (busy_loop(input));

39
sh.c
View File

@ -37,6 +37,9 @@
#include <sys/ioctl.h>
#include <sys/wait.h>
#include <unistd.h>
#ifdef BB_FEATURE_SH_COMMAND_EDITING
#include "cmdedit.h"
#endif
#define JOB_STATUS_FORMAT "[%d] %-22s %.40s\n"
@ -132,6 +135,16 @@ static const char shell_usage[] =
static char cwd[1024];
static char *prompt = "# ";
#ifdef BB_FEATURE_SH_COMMAND_EDITING
void win_changed(int sig)
{
struct winsize win = { 0, 0 };
ioctl(0, TIOCGWINSZ, &win);
if (win.ws_col > 0) {
cmdedit_setwidth( win.ws_col - 1);
}
}
#endif
/* built-in 'cd <path>' handler */
@ -398,7 +411,7 @@ static int getCommand(FILE * source, char *command)
fflush(stdout);
promptStr=(char*)malloc(sizeof(char)*(len+1));
sprintf(promptStr, "%s %s", cwd, prompt);
cmdedit_read_input(promptStr, fileno(stdin), fileno(stdout), command);
cmdedit_read_input(promptStr, command);
free( promptStr);
return 0;
#else
@ -696,7 +709,6 @@ static int parseCommand(char **commandPtr, struct job *job, int *isBg)
strcpy(job->text, *commandPtr);
} else {
/* This leaves any trailing spaces, which is a bit sloppy */
count = returnCommand - *commandPtr;
job->text = malloc(count + 1);
strncpy(job->text, *commandPtr, count);
@ -793,14 +805,12 @@ static int runCommand(struct job newJob, struct jobSet *jobList, int inBg)
if (inBg) {
/* we don't wait for background jobs to return -- append it
to the list of backgrounded jobs and leave it alone */
printf("[%d] %d\n", job->jobId,
newJob.progs[newJob.numProgs - 1].pid);
} else {
jobList->fg = job;
/* move the new process group into the foreground */
if (tcsetpgrp(0, newJob.pgrp))
perror("tcsetpgrp");
}
@ -938,29 +948,24 @@ int shell_main(int argc, char **argv)
/* initialize the cwd */
getcwd(cwd, sizeof(cwd));
#ifdef BB_FEATURE_SH_COMMAND_EDITING
signal(SIGWINCH, win_changed);
win_changed(0);
#endif
//if (argv[0] && argv[0][0] == '-') {
// shell_source("/etc/profile");
//}
if (argc < 2) {
fprintf(stdout, "\n\nBusyBox v%s (%s) Built-in shell\n", BB_VER,
BB_BT);
fprintf(stdout,
"Enter 'help' for a list of built-in commands.\n\n");
fprintf(stdout, "\n\nBusyBox v%s (%s) Built-in shell\n", BB_VER, BB_BT);
fprintf(stdout, "Enter 'help' for a list of built-in commands.\n\n");
} else {
input = fopen(argv[1], "r");
if (!input)
if (!input) {
fatalError("A: Couldn't open file '%s': %s\n", argv[1],
strerror(errno));
// else
// fatalError("Got it.\n");
//exit(shell_source(argv[1]));
/* Set terminal IO to canonical mode, and save old term settings. */
#ifdef BB_FEATURE_SH_COMMAND_EDITING
cmdedit_init();
#endif
}
}
return (busy_loop(input));

625
shell/cmdedit.c
View File

@ -53,9 +53,10 @@ static struct history *his_front = NULL; /* First element in command line list *
static struct history *his_end = NULL; /* Last element in command line list */
static struct termio old_term, new_term; /* Current termio and the previous termio before starting ash */
static int cmdedit_termw = 80; /* actual terminal width */
static int cmdedit_scroll = 27; /* width of EOL scrolling region */
static int history_counter = 0; /* Number of commands in history list */
static int reset_term = 0; /* Set to true if the terminal needs to be reset upon exit */
char *parsenextc; /* copy of parsefile->nextc */
struct history {
char *s;
@ -63,85 +64,42 @@ struct history {
struct history *n;
};
#define xwrite write
/* Version of write which resumes after a signal is caught. */
int xwrite(int fd, char *buf, int nbytes)
void
cmdedit_setwidth(int w)
{
int ntry;
int i;
int n;
n = nbytes;
ntry = 0;
for (;;) {
i = write(fd, buf, n);
if (i > 0) {
if ((n -= i) <= 0)
return nbytes;
buf += i;
ntry = 0;
} else if (i == 0) {
if (++ntry > 10)
return nbytes - n;
} else if (errno != EINTR) {
return -1;
}
}
if (w > 20) {
cmdedit_termw = w;
cmdedit_scroll = w / 3;
} else {
errorMsg("\n*** Error: minimum screen width is 21\n");
}
}
/* Version of ioctl that retries after a signal is caught. */
int xioctl(int fd, unsigned long request, char *arg)
{
int i;
while ((i = ioctl(fd, request, arg)) == -1 && errno == EINTR);
return i;
}
void cmdedit_reset_term(void)
{
if (reset_term)
xioctl(fileno(stdin), TCSETA, (void *) &old_term);
ioctl(fileno(stdin), TCSETA, (void *) &old_term);
}
void prepareToDie(int sig)
void clean_up_and_die(int sig)
{
cmdedit_reset_term();
fprintf(stdout, "\n");
exit(TRUE);
}
/* Go to HOME position */
void input_home(int outputFd, int *cursor)
{ /* Command line input routines */
{
while (*cursor > 0) {
xwrite(outputFd, "\b", 1);
--*cursor;
}
}
void input_delete(int outputFd, int cursor)
{
int j = 0;
memmove(parsenextc + cursor, parsenextc + cursor + 1,
BUFSIZ - cursor - 1);
for (j = cursor; j < (BUFSIZ - 1); j++) {
if (!*(parsenextc + j))
break;
else
xwrite(outputFd, (parsenextc + j), 1);
}
xwrite(outputFd, " \b", 2);
while (j-- > cursor)
xwrite(outputFd, "\b", 1);
}
/* Go to END position */
void input_end(int outputFd, int *cursor, int len)
{
while (*cursor < len) {
@ -150,22 +108,22 @@ void input_end(int outputFd, int *cursor, int len)
}
}
void input_backspace(int outputFd, int *cursor, int *len)
/* Delete the char in back of the cursor */
void input_backspace(char* command, int outputFd, int *cursor, int *len)
{
int j = 0;
if (*cursor > 0) {
xwrite(outputFd, "\b \b", 3);
--*cursor;
memmove(parsenextc + *cursor, parsenextc + *cursor + 1,
memmove(command + *cursor, command + *cursor + 1,
BUFSIZ - *cursor + 1);
for (j = *cursor; j < (BUFSIZ - 1); j++) {
if (!*(parsenextc + j))
if (!*(command + j))
break;
else
xwrite(outputFd, (parsenextc + j), 1);
xwrite(outputFd, (command + j), 1);
}
xwrite(outputFd, " \b", 2);
@ -177,18 +135,61 @@ void input_backspace(int outputFd, int *cursor, int *len)
}
}
#ifdef BB_FEATURE_SH_TAB_COMPLETION
/* Delete the char in front of the cursor */
void input_delete(char* command, int outputFd, int cursor, int *len)
{
int j = 0;
char** username_completion_matches(char* command, int *num_matches)
if (cursor == *len)
return;
memmove(command + cursor, command + cursor + 1,
BUFSIZ - cursor - 1);
for (j = cursor; j < (BUFSIZ - 1); j++) {
if (!*(command + j))
break;
else
xwrite(outputFd, (command + j), 1);
}
xwrite(outputFd, " \b", 2);
while (j-- > cursor)
xwrite(outputFd, "\b", 1);
--*len;
}
/* Move forward one charactor */
void input_forward(int outputFd, int *cursor, int len)
{
if (*cursor < len) {
xwrite(outputFd, "\033[C", 3);
++*cursor;
}
}
/* Move back one charactor */
void input_backward(int outputFd, int *cursor)
{
if (*cursor > 0) {
xwrite(outputFd, "\033[D", 3);
--*cursor;
}
}
#ifdef BB_FEATURE_SH_TAB_COMPLETION
char** username_tab_completion(char* command, int *num_matches)
{
char **matches = (char **) NULL;
*num_matches=0;
fprintf(stderr, "\nin username_completion_matches\n");
fprintf(stderr, "\nin username_tab_completion\n");
return (matches);
}
#include <dirent.h>
char** find_path_executable_n_cwd_matches(char* command, int *num_matches)
char** exe_n_cwd_tab_completion(char* command, int *num_matches)
{
char *dirName;
char **matches = (char **) NULL;
@ -227,6 +228,170 @@ char** find_path_executable_n_cwd_matches(char* command, int *num_matches)
return (matches);
}
void input_tab(char* command, int outputFd, int *cursor, int *len)
{
/* Do TAB completion */
static int num_matches=0;
static char **matches = (char **) NULL;
int pos = cursor;
if (lastWasTab == FALSE) {
char *tmp, *tmp1, *matchBuf;
/* For now, we will not bother with trying to distinguish
* whether the cursor is in/at a command extression -- we
* will always try all possable matches. If you don't like
* that then feel free to fix it.
*/
/* Make a local copy of the string -- up
* to the position of the cursor */
matchBuf = (char *) calloc(BUFSIZ, sizeof(char));
strncpy(matchBuf, command, cursor);
tmp=matchBuf;
/* skip past any command seperator tokens */
while (*tmp && (tmp1=strpbrk(tmp, ";|&{(`")) != NULL) {
tmp=++tmp1;
/* skip any leading white space */
while (*tmp && isspace(*tmp))
++tmp;
}
/* skip any leading white space */
while (*tmp && isspace(*tmp))
++tmp;
/* Free up any memory already allocated */
if (matches) {
free(matches);
matches = (char **) NULL;
}
/* If the word starts with `~' and there is no slash in the word,
* then try completing this word as a username. */
/* FIXME -- this check is broken! */
if (*tmp == '~' && !strchr(tmp, '/'))
matches = username_tab_completion(tmp, &num_matches);
/* Try to match any executable in our path and everything
* in the current working directory that matches. */
if (!matches)
matches = exe_n_cwd_tab_completion(tmp, &num_matches);
/* Don't leak memory */
free( matchBuf);
/* Did we find exactly one match? */
if (matches && num_matches==1) {
/* write out the matched command */
strncpy(command+pos, matches[0]+pos, strlen(matches[0])-pos);
len=strlen(command);
cursor=len;
xwrite(outputFd, matches[0]+pos, strlen(matches[0])-pos);
break;
}
} else {
/* Ok -- the last char was a TAB. Since they
* just hit TAB again, print a list of all the
* available choices... */
if ( matches && num_matches>0 ) {
int i, col;
/* Go to the next line */
xwrite(outputFd, "\n", 1);
/* Print the list of matches */
for (i=0,col=0; i<num_matches; i++) {
char foo[17];
sprintf(foo, "%-14s ", matches[i]);
col += xwrite(outputFd, foo, strlen(foo));
if (col > 60 && matches[i+1] != NULL) {
xwrite(outputFd, "\n", 1);
col = 0;
}
}
/* Go to the next line */
xwrite(outputFd, "\n", 1);
/* Rewrite the prompt */
xwrite(outputFd, prompt, strlen(prompt));
/* Rewrite the command */
xwrite(outputFd, command, len);
/* Put the cursor back to where it used to be */
for (cursor=len; cursor > pos; cursor--)
xwrite(outputFd, "\b", 1);
}
}
}
#endif
void get_previous_history(struct history **hp, char* command)
{
free((*hp)->s);
(*hp)->s = strdup(command);
*hp = (*hp)->p;
}
void get_next_history(struct history **hp, char* command)
{
free((*hp)->s);
(*hp)->s = strdup(command);
*hp = (*hp)->n;
cmdedit_redraw( NULL, hp->s, -2, -2);
}
#if 0
/* prompt : if !=NULL, print the prompt
* command: the command line to be displayed
* where : where to display changes from.
* -1 for no change, -2 for new line
* cursor : desired location for the cursor.
* -1 for Beginning of line.
* -2 for End of Line,
*/
static void
cmdedit_redraw(char* prompt, char* command, int where, int cursor)
{
static char* last_command;
int cmdedit_width;
if (where == -2) {
/* Rewrite the prompt and clean up static variables */
xwrite(outputFd, "\n", 1);
if (prompt) {
strcpy(last_command, prompt);
xwrite(outputFd, prompt, strlen(prompt));
} else {
last_command[0] = '\0';
xwrite(outputFd, "# ", 2);
}
cmdedit_width = cmdedit_termw - cmdedit_strlen(prompt);
} else if (strcmp(command, last_command) != 0) {
strcpy(last_command, prompt);
}
/* erase old command from command line */
len = strlen(command)-strlen(last_command);
while (len>0)
input_backspace(command, outputFd, &cursor, &len);
input_home(outputFd, &cursor);
/* Rewrite the command */
xwrite(outputFd, command+where, len);
/* Put the where it is supposed to be */
for (cursor=len; cursor > where; cursor--)
xwrite(outputFd, "\b", 1);
/* write new command */
strcpy(command, hp->s);
len = strlen(hp->s);
xwrite(outputFd, command+where, len);
cursor = len;
}
#endif
/*
@ -245,12 +410,12 @@ char** find_path_executable_n_cwd_matches(char* command, int *num_matches)
* Furthermore, the "vi" command editing keys are not implemented.
*
* TODO: implement TAB command completion. :)
*
*/
extern int cmdedit_read_input(char* prompt, int inputFd, int outputFd,
char command[BUFSIZ])
extern void cmdedit_read_input(char* prompt, char command[BUFSIZ])
{
int inputFd=fileno(stdin);
int outputFd=fileno(stdout);
int nr = 0;
int len = 0;
int j = 0;
@ -262,297 +427,162 @@ extern int cmdedit_read_input(char* prompt, int inputFd, int outputFd,
struct history *hp = his_end;
memset(command, 0, sizeof(command));
parsenextc = command;
if (!reset_term) {
xioctl(inputFd, TCGETA, (void *) &old_term);
ioctl(inputFd, TCGETA, (void *) &old_term);
memcpy(&new_term, &old_term, sizeof(struct termio));
new_term.c_cc[VMIN] = 1;
new_term.c_cc[VTIME] = 0;
new_term.c_lflag &= ~ICANON; /* unbuffered input */
new_term.c_lflag &= ~ECHO;
xioctl(inputFd, TCSETA, (void *) &new_term);
reset_term = 1;
ioctl(inputFd, TCSETA, (void *) &new_term);
} else {
xioctl(inputFd, TCSETA, (void *) &new_term);
ioctl(inputFd, TCSETA, (void *) &new_term);
}
memset(parsenextc, 0, BUFSIZ);
memset(command, 0, BUFSIZ);
while (1) {
if ((ret = read(inputFd, &c, 1)) < 1)
return ret;
fprintf(stderr, "\n\nkey=%d (%c)\n\n", c, c);
/* Go to the next line */
xwrite(outputFd, "\n", 1);
/* Rewrite the prompt */
xwrite(outputFd, prompt, strlen(prompt));
/* Rewrite the command */
xwrite(outputFd, parsenextc, len);
return;
switch (c) {
case '\n':
case '\r':
/* Enter */
*(command + len++ + 1) = c;
xwrite(outputFd, &c, 1);
break_out = 1;
break;
case 1:
/* Control-a -- Beginning of line */
input_home(outputFd, &cursor);
case 2:
/* Control-b -- Move back one character */
input_backward(outputFd, &cursor);
break;
case 4:
/* Control-d -- Delete one character, or exit
* if the len=0 and no chars to delete */
if (len == 0) {
xwrite(outputFd, "exit", 4);
clean_up_and_die(0);
} else {
input_delete(command, outputFd, cursor, &len);
}
break;
case 5:
/* Control-e -- End of line */
input_end(outputFd, &cursor, len);
break;
case 2:
/* Control-b -- Move back one character */
if (cursor > 0) {
xwrite(outputFd, "\033[D", 3);
cursor--;
}
break;
case 6:
/* Control-f -- Move forward one character */
if (cursor < len) {
xwrite(outputFd, "\033[C", 3);
cursor++;
}
input_forward(outputFd, &cursor, len);
break;
case 4:
/* Control-d -- Delete one character */
if (cursor != len) {
input_delete(outputFd, cursor);
len--;
} else if (len == 0) {
prepareToDie(0);
exit(0);
}
break;
case 14:
/* Control-n -- Get next command */
if (hp && hp->n && hp->n->s) {
free(hp->s);
hp->s = strdup(parsenextc);
hp = hp->n;
goto hop;
}
break;
case 16:
/* Control-p -- Get previous command */
if (hp && hp->p) {
free(hp->s);
hp->s = strdup(parsenextc);
hp = hp->p;
goto hop;
}
case '\b':
case DEL:
/* control-h and DEL */
input_backspace(command, outputFd, &cursor, &len);
break;
case '\t':
#ifdef BB_FEATURE_SH_TAB_COMPLETION
{
/* Do TAB completion */
static int num_matches=0;
static char **matches = (char **) NULL;
int pos = cursor;
if (lastWasTab == FALSE) {
char *tmp, *tmp1, *matchBuf;
/* For now, we will not bother with trying to distinguish
* whether the cursor is in/at a command extression -- we
* will always try all possable matches. If you don't like
* that then feel free to fix it.
*/
/* Make a local copy of the string -- up
* to the position of the cursor */
matchBuf = (char *) calloc(BUFSIZ, sizeof(char));
strncpy(matchBuf, parsenextc, cursor);
tmp=matchBuf;
/* skip past any command seperator tokens */
while (*tmp && (tmp1=strpbrk(tmp, ";|&{(`")) != NULL) {
tmp=++tmp1;
/* skip any leading white space */
while (*tmp && isspace(*tmp))
++tmp;
}
/* skip any leading white space */
while (*tmp && isspace(*tmp))
++tmp;
/* Free up any memory already allocated */
if (matches) {
free(matches);
matches = (char **) NULL;
}
/* If the word starts with `~' and there is no slash in the word,
* then try completing this word as a username. */
/* FIXME -- this check is broken! */
if (*tmp == '~' && !strchr(tmp, '/'))
matches = username_completion_matches(tmp, &num_matches);
/* Try to match any executable in our path and everything
* in the current working directory that matches. */
if (!matches)
matches = find_path_executable_n_cwd_matches(tmp, &num_matches);
/* Don't leak memory */
free( matchBuf);
/* Did we find exactly one match? */
if (matches && num_matches==1) {
/* write out the matched command */
strncpy(parsenextc+pos, matches[0]+pos, strlen(matches[0])-pos);
len=strlen(parsenextc);
cursor=len;
xwrite(outputFd, matches[0]+pos, strlen(matches[0])-pos);
break;
}
} else {
/* Ok -- the last char was a TAB. Since they
* just hit TAB again, print a list of all the
* available choices... */
if ( matches && num_matches>0 ) {
int i, col;
/* Go to the next line */
xwrite(outputFd, "\n", 1);
/* Print the list of matches */
for (i=0,col=0; i<num_matches; i++) {
char foo[17];
sprintf(foo, "%-14s ", matches[i]);
col += xwrite(outputFd, foo, strlen(foo));
if (col > 60 && matches[i+1] != NULL) {
xwrite(outputFd, "\n", 1);
col = 0;
}
}
/* Go to the next line */
xwrite(outputFd, "\n", 1);
/* Rewrite the prompt */
xwrite(outputFd, prompt, strlen(prompt));
/* Rewrite the command */
xwrite(outputFd, parsenextc, len);
/* Put the cursor back to where it used to be */
for (cursor=len; cursor > pos; cursor--)
xwrite(outputFd, "\b", 1);
}
}
break;
}
#else
break;
input_tab(command, outputFd, &cursor, &len);
#endif
case '\b':
case DEL:
/* Backspace */
input_backspace(outputFd, &cursor, &len);
break;
case '\n':
/* Enter */
*(parsenextc + len++ + 1) = c;
xwrite(outputFd, &c, 1);
break_out = 1;
case 14:
/* Control-n -- Get next command in history */
if (hp && hp->n && hp->n->s) {
get_next_history(&hp, command);
goto rewrite_line;
} else {
xwrite(outputFd, "\007", 1);
}
break;
case 16:
/* Control-p -- Get previous command from history */
if (hp && hp->p) {
get_previous_history(&hp, command);
goto rewrite_line;
} else {
xwrite(outputFd, "\007", 1);
}
break;
case ESC:{
/* escape sequence follows */
if ((ret = read(inputFd, &c, 1)) < 1)
return ret;
return;
if (c == '[') { /* 91 */
if ((ret = read(inputFd, &c, 1)) < 1)
return ret;
return;
switch (c) {
case 'A':
/* Up Arrow -- Get previous command */
/* Up Arrow -- Get previous command from history */
if (hp && hp->p) {
free(hp->s);
hp->s = strdup(parsenextc);
hp = hp->p;
goto hop;
get_previous_history(&hp, command);
goto rewrite_line;
} else {
xwrite(outputFd, "\007", 1);
}
break;
case 'B':
/* Down Arrow -- Get next command */
/* Down Arrow -- Get next command in history */
if (hp && hp->n && hp->n->s) {
free(hp->s);
hp->s = strdup(parsenextc);
hp = hp->n;
goto hop;
get_next_history(&hp, command);
goto rewrite_line;
} else {
xwrite(outputFd, "\007", 1);
}
break;
/* This is where we rewrite the line
* using the selected history item */
hop:
len = strlen(parsenextc);
/* return to begining of line */
for (; cursor > 0; cursor--)
xwrite(outputFd, "\b", 1);
/* erase old command */
for (j = 0; j < len; j++)
xwrite(outputFd, " ", 1);
/* return to begining of line */
for (j = len; j > 0; j--)
xwrite(outputFd, "\b", 1);
memset(parsenextc, 0, BUFSIZ);
len = strlen(parsenextc);
/* Rewrite the line with the selected history item */
rewrite_line:
/* erase old command from command line */
len = strlen(command)-strlen(hp->s);
while (len>0)
input_backspace(command, outputFd, &cursor, &len);
input_home(outputFd, &cursor);
/* write new command */
strcpy(parsenextc, hp->s);
strcpy(command, hp->s);
len = strlen(hp->s);
xwrite(outputFd, parsenextc, len);
xwrite(outputFd, command, len);
cursor = len;
break;
case 'C':
/* Right Arrow -- Move forward one character */
if (cursor < len) {
xwrite(outputFd, "\033[C", 3);
cursor++;
}
input_forward(outputFd, &cursor, len);
break;
case 'D':
/* Left Arrow -- Move back one character */
if (cursor > 0) {
xwrite(outputFd, "\033[D", 3);
cursor--;
}
input_backward(outputFd, &cursor);
break;
case '3':
/* Delete */
if (cursor != len) {
input_delete(outputFd, cursor);
len--;
}
input_delete(command, outputFd, cursor, &len);
break;
//case '5': case '6': /* pgup/pgdown */
case '7':
/* rxvt home */
case '1':
/* Home (Ctrl-A) */
input_home(outputFd, &cursor);
break;
case '8':
/* rxvt END */
case '4':
/* End (Ctrl-E) */
input_end(outputFd, &cursor, len);
break;
default:
xwrite(outputFd, "\007", 1);
}
if (c == '1' || c == '3' || c == '4')
if ((ret = read(inputFd, &c, 1)) < 1)
return ret; /* read 126 (~) */
return; /* read 126 (~) */
}
if (c == 'O') {
/* 79 */
if ((ret = read(inputFd, &c, 1)) < 1)
return ret;
return;
switch (c) {
case 'H':
/* Home (xterm) */
@ -562,6 +592,8 @@ extern int cmdedit_read_input(char* prompt, int inputFd, int outputFd,
/* End (xterm) */
input_end(outputFd, &cursor, len);
break;
default:
xwrite(outputFd, "\007", 1);
}
}
c = 0;
@ -570,8 +602,9 @@ extern int cmdedit_read_input(char* prompt, int inputFd, int outputFd,
default: /* If it's regular input, do the normal thing */
if (!isprint(c)) /* Skip non-printable characters */
if (!isprint(c)) { /* Skip non-printable characters */
break;
}
if (len >= (BUFSIZ - 2)) /* Need to leave space for enter */
break;
@ -579,15 +612,15 @@ extern int cmdedit_read_input(char* prompt, int inputFd, int outputFd,
len++;
if (cursor == (len - 1)) { /* Append if at the end of the line */
*(parsenextc + cursor) = c;
*(command + cursor) = c;
} else { /* Insert otherwise */
memmove(parsenextc + cursor + 1, parsenextc + cursor,
memmove(command + cursor + 1, command + cursor,
len - cursor - 1);
*(parsenextc + cursor) = c;
*(command + cursor) = c;
for (j = cursor; j < len; j++)
xwrite(outputFd, parsenextc + j, 1);
xwrite(outputFd, command + j, 1);
for (; j > cursor; j--)
xwrite(outputFd, "\033[D", 3);
}
@ -606,12 +639,12 @@ extern int cmdedit_read_input(char* prompt, int inputFd, int outputFd,
}
nr = len + 1;
xioctl(inputFd, TCSETA, (void *) &old_term);
ioctl(inputFd, TCSETA, (void *) &old_term);
reset_term = 0;
/* Handle command history log */
if (*(parsenextc)) {
if (*(command)) {
struct history *h = his_end;
@ -621,7 +654,7 @@ extern int cmdedit_read_input(char* prompt, int inputFd, int outputFd,
h->n = malloc(sizeof(struct history));
h->p = NULL;
h->s = strdup(parsenextc);
h->s = strdup(command);
h->n->p = h;
h->n->n = NULL;
h->n->s = NULL;
@ -634,7 +667,7 @@ extern int cmdedit_read_input(char* prompt, int inputFd, int outputFd,
h->n->p = h;
h->n->n = NULL;
h->n->s = NULL;
h->s = strdup(parsenextc);
h->s = strdup(command);
his_end = h->n;
/* After max history, remove the oldest command */
@ -652,14 +685,14 @@ extern int cmdedit_read_input(char* prompt, int inputFd, int outputFd,
}
}
return nr;
return;
}
extern void cmdedit_init(void)
{
atexit(cmdedit_reset_term);
signal(SIGINT, prepareToDie);
signal(SIGQUIT, prepareToDie);
signal(SIGTERM, prepareToDie);
signal(SIGINT, clean_up_and_die);
signal(SIGQUIT, clean_up_and_die);
signal(SIGTERM, clean_up_and_die);
}
#endif /* BB_FEATURE_SH_COMMAND_EDITING */

46
shell/cmdedit.h
View File

@ -1,17 +1,35 @@
/*
* Termios command line History and Editting for NetBSD sh (ash)
* Copyright (c) 1999
* Main code: Adam Rogoyski <rogoyski@cs.utexas.edu>
* Etc: Dave Cinege <dcinege@psychosis.com>
* Adjusted for busybox: Erik Andersen <andersee@debian.org>
*
* You may use this code as you wish, so long as the original author(s)
* are attributed in any redistributions of the source code.
* This code is 'as is' with no warranty.
* This code may safely be consumed by a BSD or GPL license.
*
#ifndef GETLINE_H
#define GETLINE_H
/* unix systems can #define POSIX to use termios, otherwise
* the bsd or sysv interface will be used
*/
extern int cmdedit_read_input(char* prompt, int inputFd, int outputFd, char command[BUFSIZ]);
extern void cmdedit_init(void);
#ifdef __STDC__
#include <stddef.h>
typedef size_t (*cmdedit_strwidth_proc)(char *);
void cmdedit_read_input(char* promptStr, char* command); /* read a line of input */
void cmdedit_setwidth(int); /* specify width of screen */
void cmdedit_histadd(char *); /* adds entries to hist */
void cmdedit_strwidth(cmdedit_strwidth_proc); /* to bind cmdedit_strlen */
extern int (*cmdedit_in_hook)(char *);
extern int (*cmdedit_out_hook)(char *);
extern int (*cmdedit_tab_hook)(char *, int, int *);
#else /* not __STDC__ */
void cmdedit_read_input(char* promptStr, char* command);
void cmdedit_setwidth();
void cmdedit_histadd();
void cmdedit_strwidth();
extern int (*cmdedit_in_hook)();
extern int (*cmdedit_out_hook)();
extern int (*cmdedit_tab_hook)();
#endif /* __STDC__ */
#endif /* GETLINE_H */

39
shell/lash.c
View File

@ -37,6 +37,9 @@
#include <sys/ioctl.h>
#include <sys/wait.h>
#include <unistd.h>
#ifdef BB_FEATURE_SH_COMMAND_EDITING
#include "cmdedit.h"
#endif
#define JOB_STATUS_FORMAT "[%d] %-22s %.40s\n"
@ -132,6 +135,16 @@ static const char shell_usage[] =
static char cwd[1024];
static char *prompt = "# ";
#ifdef BB_FEATURE_SH_COMMAND_EDITING
void win_changed(int sig)
{
struct winsize win = { 0, 0 };
ioctl(0, TIOCGWINSZ, &win);
if (win.ws_col > 0) {
cmdedit_setwidth( win.ws_col - 1);
}
}
#endif
/* built-in 'cd <path>' handler */
@ -398,7 +411,7 @@ static int getCommand(FILE * source, char *command)
fflush(stdout);
promptStr=(char*)malloc(sizeof(char)*(len+1));
sprintf(promptStr, "%s %s", cwd, prompt);
cmdedit_read_input(promptStr, fileno(stdin), fileno(stdout), command);
cmdedit_read_input(promptStr, command);
free( promptStr);
return 0;
#else
@ -696,7 +709,6 @@ static int parseCommand(char **commandPtr, struct job *job, int *isBg)
strcpy(job->text, *commandPtr);
} else {
/* This leaves any trailing spaces, which is a bit sloppy */
count = returnCommand - *commandPtr;
job->text = malloc(count + 1);
strncpy(job->text, *commandPtr, count);
@ -793,14 +805,12 @@ static int runCommand(struct job newJob, struct jobSet *jobList, int inBg)
if (inBg) {
/* we don't wait for background jobs to return -- append it
to the list of backgrounded jobs and leave it alone */
printf("[%d] %d\n", job->jobId,
newJob.progs[newJob.numProgs - 1].pid);
} else {
jobList->fg = job;
/* move the new process group into the foreground */
if (tcsetpgrp(0, newJob.pgrp))
perror("tcsetpgrp");
}
@ -938,29 +948,24 @@ int shell_main(int argc, char **argv)
/* initialize the cwd */
getcwd(cwd, sizeof(cwd));
#ifdef BB_FEATURE_SH_COMMAND_EDITING
signal(SIGWINCH, win_changed);
win_changed(0);
#endif
//if (argv[0] && argv[0][0] == '-') {
// shell_source("/etc/profile");
//}
if (argc < 2) {
fprintf(stdout, "\n\nBusyBox v%s (%s) Built-in shell\n", BB_VER,
BB_BT);
fprintf(stdout,
"Enter 'help' for a list of built-in commands.\n\n");
fprintf(stdout, "\n\nBusyBox v%s (%s) Built-in shell\n", BB_VER, BB_BT);
fprintf(stdout, "Enter 'help' for a list of built-in commands.\n\n");
} else {
input = fopen(argv[1], "r");
if (!input)
if (!input) {
fatalError("A: Couldn't open file '%s': %s\n", argv[1],
strerror(errno));
// else
// fatalError("Got it.\n");
//exit(shell_source(argv[1]));
/* Set terminal IO to canonical mode, and save old term settings. */
#ifdef BB_FEATURE_SH_COMMAND_EDITING
cmdedit_init();
#endif
}
}
return (busy_loop(input));