/* vi: set sw=4 ts=4: */
/*
- * Termios command line History and Editting for NetBSD sh (ash)
+ * Termios command line History and Editting, originally
+ * intended 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>
+ * Majorly adjusted/re-written 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.
terminal width. (more then one line.) However, history will.
*/
-#include "internal.h"
+#include "busybox.h"
#ifdef BB_FEATURE_SH_COMMAND_EDITING
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
-#include <termio.h>
+#include <sys/ioctl.h>
#include <ctype.h>
#include <signal.h>
-#define MAX_HISTORY 15 /* Maximum length of the linked list for the command line history */
+static const int MAX_HISTORY = 15; /* Maximum length of the linked list for the command line history */
+
+enum {
+ ESC = 27,
+ DEL = 127,
+};
-#define ESC 27
-#define DEL 127
#define member(c, s) ((c) ? ((char *)strchr ((s), (c)) != (char *)NULL) : 0)
#define whitespace(c) (((c) == ' ') || ((c) == '\t'))
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 */
+/* ED: sparc termios is broken: revert back to old termio handling. */
+#ifdef BB_FEATURE_USE_TERMIOS
+
+#if #cpu(sparc)
+# include <termio.h>
+# define termios termio
+# define setTermSettings(fd,argp) ioctl(fd,TCSETAF,argp)
+# define getTermSettings(fd,argp) ioctl(fd,TCGETA,argp)
+#else
+# include <termios.h>
+# define setTermSettings(fd,argp) tcsetattr(fd,TCSANOW,argp)
+# define getTermSettings(fd,argp) tcgetattr(fd, argp);
+#endif
+
+/* Current termio and the previous termio before starting sh */
+static struct termios initial_settings, new_settings;
+
+
+#ifndef _POSIX_VDISABLE
+#define _POSIX_VDISABLE '\0'
+#endif
+
+#endif
+
+
+
+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 */
+static int exithandler_set = 0; /* Set to true when atexit() has been called */
+
+
+/* Link into lash to reset context to 0
+ * on ^C and such */
+extern unsigned int shell_context;
+
struct history {
char *s;
struct history *n;
};
+#define xwrite write
-/* Version of write which resumes after a signal is caught. */
-int xwrite(int fd, char *buf, int nbytes)
+/*
+ * TODO: Someday we want to implement 'horizontal scrolling' of the
+ * command-line when the user has typed more than the current width. This
+ * would allow the user to see a 'window' of what he has typed.
+ */
+static 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 {
+ error_msg("\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)
+static void win_changed(int junk)
{
- int i;
-
- while ((i = ioctl(fd, request, arg)) == -1 && errno == EINTR);
- return i;
+ struct winsize win = { 0, 0, 0, 0 };
+ ioctl(0, TIOCGWINSZ, &win);
+ if (win.ws_col > 0) {
+ cmdedit_setwidth( win.ws_col - 1);
+ }
}
-void cmdedit_reset_term(void)
+static void cmdedit_reset_term(void)
{
if (reset_term)
- xioctl(fileno(stdin), TCSETA, (void *) &old_term);
+ /* sparc and other have broken termios support: use old termio handling. */
+ setTermSettings(fileno(stdin), (void*) &initial_settings);
+#ifdef BB_FEATURE_CLEAN_UP
+ if (his_front) {
+ struct history *n;
+ //while(his_front!=his_end) {
+ while(his_front!=his_end) {
+ n = his_front->n;
+ free(his_front->s);
+ free(his_front);
+ his_front=n;
+ }
+ }
+#endif
}
-void prepareToDie(int sig)
+static void clean_up_and_die(int sig)
{
cmdedit_reset_term();
- fprintf(stdout, "\n");
- exit(TRUE);
+ printf("\n");
+ if (sig!=SIGINT)
+ exit(EXIT_SUCCESS);
}
-void input_home(int outputFd, int *cursor)
-{ /* Command line input routines */
+/* Go to HOME position */
+static void input_home(int outputFd, int *cursor)
+{
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);
-}
-
-
-void input_end(int outputFd, int *cursor, int len)
+/* Go to END position */
+static void input_end(int outputFd, int *cursor, int len)
{
while (*cursor < len) {
xwrite(outputFd, "\033[C", 3);
}
}
-
-void input_backspace(int outputFd, int *cursor, int *len)
+/* Delete the char in back of the cursor */
+static void input_backspace(char* command, int outputFd, int *cursor, int *len)
{
int j = 0;
+/* Debug crap */
+//fprintf(stderr, "\nerik: len=%d, cursor=%d, strlen(command)='%d'\n", *len, *cursor, strlen(command));
+//xwrite(outputFd, command, *len);
+//*cursor = *len;
+
+
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);
}
}
-char** username_completion_matches(char* command, int *num_matches)
+/* Delete the char in front of the cursor */
+static void input_delete(char* command, int outputFd, int cursor, int *len)
+{
+ int j = 0;
+
+ 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 */
+static void input_forward(int outputFd, int *cursor, int len)
+{
+ if (*cursor < len) {
+ xwrite(outputFd, "\033[C", 3);
+ ++*cursor;
+ }
+}
+
+/* Move back one charactor */
+static void input_backward(int outputFd, int *cursor)
+{
+ if (*cursor > 0) {
+ xwrite(outputFd, "\033[D", 3);
+ --*cursor;
+ }
+}
+
+
+
+#ifdef BB_FEATURE_SH_TAB_COMPLETION
+static 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)
+static char** exe_n_cwd_tab_completion(char* command, int *num_matches)
{
char *dirName;
- char **matches = (char **) NULL;
+ char **matches;
DIR *dir;
struct dirent *next;
- matches = malloc( sizeof(char*)*50);
+ matches = xmalloc( sizeof(char*)*50);
/* Stick a wildcard onto the command, for later use */
strcat( command, "*");
/* See if this matches */
if (check_wildcard_match(next->d_name, command) == TRUE) {
/* Cool, found a match. Add it to the list */
- matches[*num_matches] = malloc(strlen(next->d_name)+1);
+ matches[*num_matches] = xmalloc(strlen(next->d_name)+1);
strcpy( matches[*num_matches], next->d_name);
++*num_matches;
//matches = realloc( matches, sizeof(char*)*(*num_matches));
return (matches);
}
+static void input_tab(char* command, char* prompt, int outputFd, int *cursor, int *len, int lastWasTab)
+{
+ /* 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 possible 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 *) xcalloc(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);
+ return;
+ }
+ } 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
+
+static void get_previous_history(struct history **hp, char* command)
+{
+ if ((*hp)->s)
+ free((*hp)->s);
+ (*hp)->s = strdup(command);
+ *hp = (*hp)->p;
+}
+
+static void get_next_history(struct history **hp, char* command)
+{
+ if ((*hp)->s)
+ free((*hp)->s);
+ (*hp)->s = strdup(command);
+ *hp = (*hp)->n;
+}
+
/*
* This function is used to grab a character buffer
* from the input file descriptor and allows you to
* 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;
char c = 0;
struct history *hp = his_end;
- memset(command, 0, sizeof(command));
- parsenextc = command;
if (!reset_term) {
- xioctl(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);
+
+ getTermSettings(inputFd, (void*) &initial_settings);
+ memcpy(&new_settings, &initial_settings, sizeof(struct termios));
+ new_settings.c_cc[VMIN] = 1;
+ new_settings.c_cc[VTIME] = 0;
+ new_settings.c_cc[VINTR] = _POSIX_VDISABLE; /* Turn off CTRL-C, so we can trap it */
+ new_settings.c_lflag &= ~ICANON; /* unbuffered input */
+ new_settings.c_lflag &= ~(ECHO|ECHOCTL|ECHONL); /* Turn off echoing */
reset_term = 1;
- } else {
- xioctl(inputFd, TCSETA, (void *) &new_term);
}
+ setTermSettings(inputFd, (void*) &new_settings);
+
+ memset(command, 0, BUFSIZ);
- memset(parsenextc, 0, BUFSIZ);
+ /* Print out the command prompt */
+ xwrite(outputFd, prompt, strlen(prompt));
while (1) {
if ((ret = read(inputFd, &c, 1)) < 1)
- return ret;
+ return;
+ //fprintf(stderr, "got a '%c' (%d)\n", c, c);
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 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--;
+ input_backward(outputFd, &cursor);
+ break;
+ case 3:
+ /* Control-c -- stop gathering input */
+
+ /* Link into lash to reset context to 0 on ^C and such */
+ shell_context = 0;
+
+ /* Go to the next line */
+ xwrite(outputFd, "\n", 1);
+
+#if 0
+ /* Rewrite the prompt */
+ xwrite(outputFd, prompt, strlen(prompt));
+
+ /* Reset the command string */
+ memset(command, 0, BUFSIZ);
+ len = cursor = 0;
+#endif
+ return;
+
+ 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 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);
- }
+ case '\b':
+ case DEL:
+ /* Control-h and DEL */
+ input_backspace(command, outputFd, &cursor, &len);
+ break;
+ case '\t':
+#ifdef BB_FEATURE_SH_TAB_COMPLETION
+ input_tab(command, prompt, outputFd, &cursor,
+&len, lastWasTab);
+#endif
break;
case 14:
- /* Control-n -- Get next command */
+ /* Control-n -- 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;
case 16:
- /* Control-p -- Get previous command */
+ /* Control-p -- Get previous command from history */
if (hp && hp->p) {
- free(hp->s);
- hp->s = strdup(parsenextc);
- hp = hp->p;
- goto hop;
- }
- break;
- case '\t':
- {
- /* 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;
+ get_previous_history(&hp, command);
+ goto rewrite_line;
+ } else {
+ xwrite(outputFd, "\007", 1);
}
- 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;
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);
+ /* Rewrite the line with the selected history item */
+ rewrite_line:
+ /* erase old command from command line */
+ len = strlen(command)-strlen(hp->s);
- /* return to begining of line */
- for (j = len; j > 0; j--)
- xwrite(outputFd, "\b", 1);
-
- memset(parsenextc, 0, BUFSIZ);
- len = strlen(parsenextc);
+ while (len>cursor)
+ input_delete(command, outputFd, cursor, &len);
+ while (cursor>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 '1':
/* Home (Ctrl-A) */
/* 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) */
/* End (xterm) */
input_end(outputFd, &cursor, len);
break;
+ default:
+ xwrite(outputFd, "\007", 1);
}
}
c = 0;
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;
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);
}
}
nr = len + 1;
- xioctl(inputFd, TCSETA, (void *) &old_term);
+ setTermSettings(inputFd, (void *) &initial_settings);
reset_term = 0;
/* Handle command history log */
- if (*(parsenextc)) {
+ if (*(command)) {
struct history *h = his_end;
if (!h) {
- /* No previous history */
- h = his_front = malloc(sizeof(struct history));
- h->n = malloc(sizeof(struct history));
+ /* No previous history -- this memory is never freed */
+ h = his_front = xmalloc(sizeof(struct history));
+ h->n = xmalloc(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;
his_end = h->n;
history_counter++;
} else {
- /* Add a new history command */
- h->n = malloc(sizeof(struct history));
+ /* Add a new history command -- this memory is never freed */
+ h->n = xmalloc(sizeof(struct history));
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 */
}
}
- return nr;
+ return;
}
extern void cmdedit_init(void)
{
- atexit(cmdedit_reset_term);
- signal(SIGINT, prepareToDie);
- signal(SIGQUIT, prepareToDie);
- signal(SIGTERM, prepareToDie);
+ win_changed(0);
+ signal(SIGWINCH, win_changed);
+
+ if(exithandler_set == 0) {
+ atexit(cmdedit_reset_term); /* be sure to do this only once */
+ exithandler_set = 1;
+ }
+ signal(SIGKILL, clean_up_and_die);
+ signal(SIGINT, clean_up_and_die);
+ signal(SIGQUIT, clean_up_and_die);
+ signal(SIGTERM, clean_up_and_die);
+}
+
+/*
+** Undo the effects of cmdedit_init() as good as we can:
+** I am not aware of a way to revoke an atexit() handler,
+** but, fortunately, our particular handler can be made
+** a no-op by setting reset_term = 0.
+*/
+extern void cmdedit_terminate(void)
+{
+ cmdedit_reset_term();
+ reset_term = 0;
+ signal(SIGKILL, SIG_DFL);
+ signal(SIGINT, SIG_DFL);
+ signal(SIGQUIT, SIG_DFL);
+ signal(SIGTERM, SIG_DFL);
+ signal(SIGWINCH, SIG_DFL);
}
+
+
+
#endif /* BB_FEATURE_SH_COMMAND_EDITING */