need to be added. This version was created on Debian GNU/Linux 2.x.
Delete, Backspace, Home, End, and the arrow keys were tested
to work in an Xterm and console. Ctrl-A also works as Home.
- Ctrl-E also works as End. The binary size increase is <3K.
+ Ctrl-E also works as End.
- Editting will not display correctly for lines greater then the
- terminal width. (more then one line.) However, history will.
+
+ Editor with vertical scrolling and completion by
+ Vladimir Oleynik. vodz@usa.net (c) 2001
+
+ Small bug: not true work if terminal size (x*y symbols) less
+ size (prompt + editor`s line + 2 symbols)
*/
-#include "internal.h"
+
+
+#include "busybox.h"
+
#ifdef BB_FEATURE_SH_COMMAND_EDITING
#include <stdio.h>
#include <ctype.h>
#include <signal.h>
+#ifdef BB_FEATURE_SH_TAB_COMPLETION
+#include <sys/stat.h>
+#endif
+
+#include "pwd_grp/pwd.h"
+
+
+static const int MAX_HISTORY = 15; /* Maximum length of the linked list for the command line history */
-#define 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_end = NULL; /* Last element in command line list */
/* ED: sparc termios is broken: revert back to old termio handling. */
-#ifdef BB_FEATURE_USE_TERMIOS
#if #cpu(sparc)
# include <termio.h>
#endif
/* Current termio and the previous termio before starting sh */
-struct termios initial_settings, new_settings;
+static struct termios initial_settings, new_settings;
#ifndef _POSIX_VDISABLE
#define _POSIX_VDISABLE '\0'
#endif
-#endif
+static
+volatile int cmdedit_termw; /* actual terminal width */
+static int history_counter = 0; /* Number of commands in history list */
+
+static
+volatile int handlers_sets = 0; /* Set next bites
+ when atexit() has been called
+ and set many "terminates" signal handlers
+ and winchg signal handler
+ and if the terminal needs to be reset upon exit
+ */
+enum {
+ SET_ATEXIT = 1,
+ SET_TERM_HANDLERS = 2,
+ SET_WCHG_HANDLERS = 4,
+ SET_RESET_TERM = 8,
+};
+
+
+static int cmdedit_x; /* real x terminal position,
+ require put prompt in start x position */
+static int cmdedit_y; /* pseudoreal y terminal position */
+static int cmdedit_prmt_len; /* for fast running, without duplicate calculate */
+
+static int cursor; /* required global for signal handler */
+static int len; /* --- "" - - "" - -"- --""-- --""--- */
+static char *command_ps; /* --- "" - - "" - -"- --""-- --""--- */
+static const char *cmdedit_prompt;/* --- "" - - "" - -"- --""-- --""--- */
+/* Link into lash to reset context to 0
+ * on ^C and such */
+extern unsigned int shell_context;
-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 */
-static int exithandler_set = 0; /* Set to true when atexit() has been called */
struct history {
char *s;
struct history *n;
};
-#define xwrite write
+static void cmdedit_setwidth(int w, int redraw_flg);
-/*
- * 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.
- */
-void
-cmdedit_setwidth(int w)
+static void win_changed(int nsig)
{
- if (w > 20) {
- cmdedit_termw = w;
- cmdedit_scroll = w / 3;
- } else {
- errorMsg("\n*** Error: minimum screen width is 21\n");
+ struct winsize win = { 0, 0, 0, 0 };
+ static __sighandler_t previous_SIGWINCH_handler; /* for reset */
+
+ /* emulate signal call if not called as a sig handler */
+ if(nsig == -SIGWINCH || nsig == SIGWINCH) {
+ ioctl(0, TIOCGWINSZ, &win);
+ if (win.ws_col > 0) {
+ cmdedit_setwidth( win.ws_col, nsig == SIGWINCH );
+ } else {
+ /* Default to 79 if their console doesn't want to share */
+ cmdedit_setwidth( 79, nsig == SIGWINCH );
+ }
}
+
+ /* Unix not all standart in recall signal */
+
+ if(nsig == -SIGWINCH) /* save previous handler */
+ previous_SIGWINCH_handler = signal(SIGWINCH, win_changed);
+ else if(nsig == SIGWINCH) /* signaled called handler */
+ signal(SIGWINCH, win_changed); /* set for next call */
+ else /* set previous handler */
+ signal(SIGWINCH, previous_SIGWINCH_handler); /* reset */
}
-
-void cmdedit_reset_term(void)
+static void cmdedit_reset_term(void)
{
- if (reset_term)
+ if((handlers_sets & SET_RESET_TERM)!=0) {
/* sparc and other have broken termios support: use old termio handling. */
setTermSettings(fileno(stdin), (void*) &initial_settings);
+ handlers_sets &= ~SET_RESET_TERM;
+ }
+ if((handlers_sets & SET_WCHG_HANDLERS)!=0) {
+ /* reset SIGWINCH handler to previous (default) */
+ win_changed(0);
+ handlers_sets &= ~SET_WCHG_HANDLERS;
+ }
+ fflush(stdout);
#ifdef BB_FEATURE_CLEAN_UP
if (his_front) {
struct history *n;
#endif
}
-void clean_up_and_die(int sig)
-{
- cmdedit_reset_term();
- fprintf(stdout, "\n");
- if (sig!=SIGINT)
- exit(TRUE);
-}
-/* Go to HOME position */
-void input_home(int outputFd, int *cursor)
-{
- while (*cursor > 0) {
- xwrite(outputFd, "\b", 1);
- --*cursor;
- }
-}
-/* Go to END position */
-void input_end(int outputFd, int *cursor, int len)
-{
- while (*cursor < len) {
- xwrite(outputFd, "\033[C", 3);
- ++*cursor;
+/* special for recount position for scroll and remove terminal margin effect */
+static void cmdedit_set_out_char(int c, int next_char) {
+ putchar(c);
+ if(++cmdedit_x>=cmdedit_termw) {
+ /* terminal is scrolled down */
+ cmdedit_y++;
+ cmdedit_x=0;
+
+ if(!next_char)
+ next_char = ' ';
+ /* destroy "(auto)margin" */
+ putchar(next_char);
+ putchar('\b');
}
+ cursor++;
}
-/* Delete the char in back of the cursor */
-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;
+/* Move to end line. Bonus: rewrite line from cursor without use
+ special control terminal strings, also saved size and speed! */
+static void input_end (void) {
+ while(cursor < len)
+ cmdedit_set_out_char(command_ps[cursor], 0);
+}
+/* Go to the next line */
+static void goto_new_line(void) {
+ input_end();
+ cmdedit_set_out_char('\n', 0);
+}
- if (*cursor > 0) {
- xwrite(outputFd, "\b \b", 3);
- --*cursor;
- 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);
- }
+static inline void out1str(const char *s) { fputs (s, stdout); }
+static inline void beep (void) { putchar('\007'); }
- xwrite(outputFd, " \b", 2);
+/* Go to HOME position */
+static void input_home(void)
+{
+ while(cmdedit_y>0) { /* up to start y */
+ out1str("\033[A");
+ cmdedit_y--;
+ }
+ putchar('\r');
+ cursor = 0;
+ out1str(cmdedit_prompt);
+ cmdedit_x = cmdedit_prmt_len;
- while (j-- > *cursor)
- xwrite(outputFd, "\b", 1);
+}
- --*len;
+/* Move back one charactor */
+static void input_backward(void) {
+ if (cursor > 0) {
+ cursor--;
+ if(cmdedit_x!=0) { /* no first position in terminal line */
+ putchar('\b');
+ cmdedit_x--;
+ }
+ else {
+ out1str("\033[A"); /* up */
+ cmdedit_y--;
+
+ /* to end in current terminal line */
+ while(cmdedit_x<(cmdedit_termw-1)) {
+ out1str("\033[C");
+ cmdedit_x++;
+ }
+ }
}
}
/* Delete the char in front of the cursor */
-void input_delete(char* command, int outputFd, int cursor, int *len)
+static void input_delete(void)
{
- int j = 0;
+ int j = cursor;
- if (cursor == *len)
+ if (j == 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);
+ memmove (command_ps + j, command_ps + j + 1, BUFSIZ - j - 1);
+ len--;
+ input_end(); /* rewtite new line */
+ cmdedit_set_out_char(' ', 0); /* destroy end char */
+ while (j < cursor)
+ input_backward(); /* back to old pos cursor */
+}
+
+/* Delete the char in back of the cursor */
+static void input_backspace(void)
+{
+ if (cursor > 0) {
+ input_backward();
+ input_delete ();
}
+}
- xwrite(outputFd, " \b", 2);
- while (j-- > cursor)
- xwrite(outputFd, "\b", 1);
- --*len;
+/* Move forward one charactor */
+static void input_forward(void)
+{
+ if (cursor < len)
+ cmdedit_set_out_char(command_ps[cursor], command_ps[cursor + 1]);
}
-/* Move forward one charactor */
-void input_forward(int outputFd, int *cursor, int len)
+
+static void clean_up_and_die(int sig)
{
- if (*cursor < len) {
- xwrite(outputFd, "\033[C", 3);
- ++*cursor;
- }
+ goto_new_line();
+ if (sig!=SIGINT)
+ exit(EXIT_SUCCESS); /* cmdedit_reset_term() called in atexit */
+ cmdedit_reset_term();
}
-/* Move back one charactor */
-void input_backward(int outputFd, int *cursor)
+static void cmdedit_setwidth(int w, int redraw_flg)
{
- if (*cursor > 0) {
- xwrite(outputFd, "\033[D", 3);
- --*cursor;
+ cmdedit_termw = cmdedit_prmt_len+2;
+ if (w > cmdedit_termw) {
+
+ cmdedit_termw = w;
+
+ if(redraw_flg) {
+ int sav_cursor = cursor;
+
+ /* set variables for new terminal size */
+ cmdedit_y = sav_cursor/w;
+ cmdedit_x = sav_cursor-cmdedit_y*w;
+
+ /* redraw */
+ input_home();
+ input_end();
+ while(sav_cursor<cursor)
+ input_backward();
+ }
+ } else {
+ error_msg("\n*** Error: minimum screen width is %d", cmdedit_termw);
}
}
+extern void cmdedit_init(void)
+{
+ if((handlers_sets & SET_WCHG_HANDLERS)==0) {
+ /* pretend we received a signal in order to set term size and sig handling */
+ win_changed(-SIGWINCH);
+ handlers_sets |= SET_WCHG_HANDLERS;
+ }
+ if((handlers_sets & SET_ATEXIT)==0) {
+ atexit(cmdedit_reset_term); /* be sure to do this only once */
+ handlers_sets |= SET_ATEXIT;
+ }
+ if((handlers_sets & SET_TERM_HANDLERS)==0) {
+ signal(SIGKILL, clean_up_and_die);
+ signal(SIGINT, clean_up_and_die);
+ signal(SIGQUIT, clean_up_and_die);
+ signal(SIGTERM, clean_up_and_die);
+ handlers_sets |= SET_TERM_HANDLERS;
+ }
+}
#ifdef BB_FEATURE_SH_TAB_COMPLETION
-char** username_tab_completion(char* command, int *num_matches)
+
+#ifdef BB_FEATURE_USERNAME_COMPLETION
+static char** username_tab_completion(char *ud, int *num_matches)
{
+ static struct passwd *entry;
+ int userlen;
char **matches = (char **) NULL;
- *num_matches=0;
- fprintf(stderr, "\nin username_tab_completion\n");
+ char *temp;
+ int nm = 0;
+
+ setpwent ();
+ userlen = strlen (ud + 1);
+
+ while ((entry = getpwent ()) != NULL) {
+ /* Null usernames should result in all users as possible completions. */
+ if (!userlen || !strncmp (ud + 1, entry->pw_name, userlen)) {
+
+ temp = xmalloc (3 + strlen (entry->pw_name));
+ sprintf(temp, "~%s/", entry->pw_name);
+
+ matches = xrealloc(matches, (nm+1)*sizeof(char *));
+ matches[nm++] = temp;
+ }
+ }
+
+ endpwent ();
+ (*num_matches) = nm;
return (matches);
}
+#endif
+
+enum {
+ FIND_EXE_ONLY = 0,
+ FIND_DIR_ONLY = 1,
+ FIND_FILE_ONLY = 2,
+};
#include <dirent.h>
-char** exe_n_cwd_tab_completion(char* command, int *num_matches)
+
+static int path_parse(char ***p, int flags)
+{
+ int npth;
+ char *tmp;
+ char *pth;
+
+ if(flags!=FIND_EXE_ONLY || (pth=getenv("PATH"))==0) {
+ /* if not setenv PATH variable, to search cur dir "." */
+ (*p) = xmalloc(sizeof(char *));
+ (*p)[0] = xstrdup(".");
+ return 1;
+ }
+
+ tmp = pth;
+ npth=0;
+
+ for(;;) {
+ npth++; /* count words is + 1 count ':' */
+ tmp = strchr(tmp, ':');
+ if(tmp)
+ tmp++;
+ else
+ break;
+ }
+
+ *p = xmalloc(npth*sizeof(char *));
+
+ tmp = pth;
+ (*p)[0] = xstrdup(tmp);
+ npth=1; /* count words is + 1 count ':' */
+
+ for(;;) {
+ tmp = strchr(tmp, ':');
+ if(tmp) {
+ (*p)[0][(tmp-pth)]=0; /* ':' -> '\0'*/
+ tmp++;
+ } else
+ break;
+ (*p)[npth++] = &(*p)[0][(tmp-pth)]; /* p[next]=p[0][&'\0'+1] */
+ }
+
+ return npth;
+}
+
+static char** exe_n_cwd_tab_completion(char* command, int *num_matches, int type)
{
char *dirName;
- char **matches = (char **) NULL;
+ char **matches = 0;
DIR *dir;
struct dirent *next;
+ char cmd [BUFSIZ+4];
+ char *dirbuf;
+ char found [BUFSIZ+4];
+ int nm = *num_matches;
+ struct stat st;
+ char **paths;
+ int npaths;
+ int i;
+ char full_pth[BUFSIZ+4+PATH_MAX];
+
+
+ strcpy(cmd, command); /* save for change (last '/' to '\0') */
+
+ dirName = strrchr(cmd, '/');
+ if(dirName==NULL) {
+ /* no dir, if flags==EXE_ONLY - get paths, else "." */
+ npaths = path_parse(&paths, type);
+ if(npaths==0)
+ return 0;
+ } else {
+ /* with dir */
+
+ /* save dir */
+ dirbuf = xstrdup(cmd);
+ /* set only dirname */
+ dirbuf[(dirName-cmd)+1]=0;
+
+ /* strip dirname in cmd */
+ strcpy(cmd, dirName+1);
- matches = malloc( sizeof(char*)*50);
+ paths = xmalloc(sizeof(char*));
+ paths[0] = dirbuf;
+ npaths = 1; /* only 1 dir */
+ }
- /* Stick a wildcard onto the command, for later use */
- strcat( command, "*");
+ for(i=0; i < npaths; i++) {
- /* Now wall the current directory */
- dirName = get_current_dir_name();
- dir = opendir(dirName);
+ dir = opendir(paths[i]);
if (!dir) {
/* Don't print an error, just shut up and return */
- *num_matches=0;
return (matches);
}
while ((next = readdir(dir)) != NULL) {
-
- /* Some quick sanity checks */
- if ((strcmp(next->d_name, "..") == 0)
- || (strcmp(next->d_name, ".") == 0)) {
+ /* matched ? */
+ if(strncmp(next->d_name, cmd, strlen(cmd)))
+ continue;
+ /* not see .name without .match */
+ if(*next->d_name == '.' && *cmd != '.')
+ continue;
+ sprintf(full_pth, "%s/%s", paths[i], next->d_name);
+ /* hmm, remover in progress? */
+ if(stat(full_pth, &st)<0)
+ continue;
+ /* Cool, found a match. */
+ if (S_ISDIR(st.st_mode)) {
+ /* name is directory */
+ strcpy(found, next->d_name);
+ strcat(found, "/");
+ if(type==FIND_DIR_ONLY)
+ strcat(found, " ");
+ } else {
+ /* not put found file if search only dirs for cd */
+ if(type==FIND_DIR_ONLY)
continue;
+ strcpy(found, next->d_name);
+ strcat(found, " ");
}
- /* 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);
- strcpy( matches[*num_matches], next->d_name);
- ++*num_matches;
- //matches = realloc( matches, sizeof(char*)*(*num_matches));
+ /* Add it to the list */
+ matches = xrealloc(matches, (nm+1)*sizeof(char *));
+ matches[nm++] = xstrdup(found);
}
}
-
+ free(paths[0]); /* allocate memory only in first member */
+ free(paths);
+ *num_matches = nm;
return (matches);
}
-void input_tab(char* command, char* prompt, int outputFd, int *cursor, int *len)
+static void input_tab(int lastWasTab)
{
/* Do TAB completion */
- static int num_matches=0;
- static char **matches = (char **) NULL;
- int pos = cursor;
+ static int num_matches;
+ static char **matches;
+
+ char matchBuf[BUFSIZ];
+
+ int pos = cursor;
+ int find_type=FIND_FILE_ONLY;
if (lastWasTab == FALSE) {
- char *tmp, *tmp1, *matchBuf;
+ char *tmp, *tmp1;
+ int len_found;
/* For now, we will not bother with trying to distinguish
* whether the cursor is in/at a command extression -- we
/* 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;
+ memset(matchBuf, 0, BUFSIZ);
+ tmp = strncpy(matchBuf, command_ps, cursor);
/* skip past any command seperator tokens */
- while (*tmp && (tmp1=strpbrk(tmp, ";|&{(`")) != NULL) {
- tmp=++tmp1;
- /* skip any leading white space */
- while (*tmp && isspace(*tmp))
- ++tmp;
+ while ( (tmp1=strpbrk(tmp, ";|&{(`")) != NULL) {
+ tmp = ++tmp1;
}
/* skip any leading white space */
- while (*tmp && isspace(*tmp))
- ++tmp;
+ while (*tmp == ' ')
+ tmp++;
+
+ if(strncmp(tmp, "cd ", 3)==0)
+ find_type = FIND_DIR_ONLY;
+ else if(strchr(tmp, ' ')==NULL)
+ find_type = FIND_EXE_ONLY;
+
+ /* find begin curent word */
+ if( (tmp1=strrchr(tmp, ' ')) != NULL) {
+ tmp = ++tmp1;
+ }
+ strcpy(matchBuf, tmp);
/* Free up any memory already allocated */
if (matches) {
+ while(num_matches>0)
+ free(matches[--num_matches]);
free(matches);
matches = (char **) NULL;
}
+#ifdef BB_FEATURE_USERNAME_COMPLETION
/* 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);
-
+ if (matchBuf[0]=='~' && strchr(matchBuf, '/')==0) {
+ matches = username_tab_completion(matchBuf, &num_matches);
+ }
+#endif
/* 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);
+ matches = exe_n_cwd_tab_completion(matchBuf, &num_matches, find_type);
/* Did we find exactly one match? */
- if (matches && num_matches==1) {
+ if(!matches || num_matches>1) {
+ beep();
+ return;
+ }
+
+ len_found = strlen(matches[0]);
+
+ /* have space to placed match? */
+ if ( (len_found-strlen(matchBuf)+len) < BUFSIZ ) {
+
+ int recalc_pos = len;
+
+ /* before word for match */
+ command_ps[pos-strlen(matchBuf)]=0;
+
+ /* tail line */
+ strcpy(matchBuf, command_ps+pos);
+
+ /* add match */
+ strcat(command_ps, matches[0]);
+ /* add tail */
+ strcat(command_ps, matchBuf);
+
/* 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;
+ len=strlen(command_ps);
+ recalc_pos = len-recalc_pos+pos;
+ input_end(); /* write */
+ while(recalc_pos<cursor)
+ input_backward();
+ return;
}
} else {
/* Ok -- the last char was a TAB. Since they
* available choices... */
if ( matches && num_matches>0 ) {
int i, col;
+ int sav_cursor = cursor;
/* Go to the next line */
- xwrite(outputFd, "\n", 1);
- /* Print the list of matches */
+ goto_new_line();
for (i=0,col=0; i<num_matches; i++) {
- char foo[17];
- sprintf(foo, "%-14s ", matches[i]);
- col += xwrite(outputFd, foo, strlen(foo));
+ printf("%s ", matches[i]);
+ col += strlen(matches[i])+2;
+ col -= (col/cmdedit_termw)*cmdedit_termw;
if (col > 60 && matches[i+1] != NULL) {
- xwrite(outputFd, "\n", 1);
+ putchar('\n');
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);
+ /* Go to the next line and rewrite the prompt */
+ printf("\n%s", cmdedit_prompt);
+ cmdedit_x = cmdedit_prmt_len;
+ cmdedit_y = 0;
+ cursor = 0;
+ input_end(); /* Rewrite the command */
/* Put the cursor back to where it used to be */
- for (cursor=len; cursor > pos; cursor--)
- xwrite(outputFd, "\b", 1);
+ while (sav_cursor < cursor)
+ input_backward();
}
}
}
#endif
-void get_previous_history(struct history **hp, char* command)
+static void get_previous_history(struct history **hp, char* command)
{
if ((*hp)->s)
free((*hp)->s);
*hp = (*hp)->p;
}
-void get_next_history(struct history **hp, char* command)
+static void get_next_history(struct history **hp, char* command)
{
if ((*hp)->s)
free((*hp)->s);
{
int inputFd=fileno(stdin);
- int outputFd=fileno(stdout);
- int nr = 0;
- int len = 0;
+
int j = 0;
- int cursor = 0;
int break_out = 0;
int ret = 0;
int lastWasTab = FALSE;
char c = 0;
struct history *hp = his_end;
- if (!reset_term) {
+ len = 0;
+ cursor = 0;
+ command_ps = command;
+
+ if (new_settings.c_cc[VMIN]==0) {
getTermSettings(inputFd, (void*) &initial_settings);
memcpy(&new_settings, &initial_settings, sizeof(struct termios));
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;
}
setTermSettings(inputFd, (void*) &new_settings);
+ handlers_sets |= SET_RESET_TERM;
memset(command, 0, BUFSIZ);
+ cmdedit_init();
+
+ /* Print out the command prompt */
+ cmdedit_prompt = prompt;
+ cmdedit_prmt_len = strlen(prompt);
+ printf("%s", prompt);
+ cmdedit_x = cmdedit_prmt_len; /* count real x terminal position */
+ cmdedit_y = 0; /* quasireal y, not true work if line > xt*yt */
+
+
while (1) {
+ fflush(stdout); /* buffered out to fast */
+
if ((ret = read(inputFd, &c, 1)) < 1)
return;
//fprintf(stderr, "got a '%c' (%d)\n", c, c);
case '\n':
case '\r':
/* Enter */
- *(command + len++ + 1) = c;
- xwrite(outputFd, &c, 1);
+ *(command + len) = c;
+ len++;
+ input_end ();
break_out = 1;
break;
case 1:
/* Control-a -- Beginning of line */
- input_home(outputFd, &cursor);
+ input_home();
+ break;
case 2:
/* Control-b -- Move back one character */
- input_backward(outputFd, &cursor);
+ input_backward();
break;
case 3:
- /* Control-c -- leave the current line,
- * and start over on the next line */
+ /* 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);
+ goto_new_line();
+#if 0
/* Rewrite the prompt */
- xwrite(outputFd, prompt, strlen(prompt));
+ printf("%s", prompt);
/* Reset the command string */
memset(command, 0, BUFSIZ);
len = cursor = 0;
+#endif
+ return;
- 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);
+ printf("exit");
clean_up_and_die(0);
} else {
- input_delete(command, outputFd, cursor, &len);
+ input_delete();
}
break;
case 5:
/* Control-e -- End of line */
- input_end(outputFd, &cursor, len);
+ input_end();
break;
case 6:
/* Control-f -- Move forward one character */
- input_forward(outputFd, &cursor, len);
+ input_forward();
break;
case '\b':
case DEL:
/* Control-h and DEL */
- input_backspace(command, outputFd, &cursor, &len);
+ input_backspace();
break;
case '\t':
#ifdef BB_FEATURE_SH_TAB_COMPLETION
- input_tab(command, prompt, outputFd, &cursor, &len);
+ input_tab(lastWasTab);
#endif
break;
case 14:
get_next_history(&hp, command);
goto rewrite_line;
} else {
- xwrite(outputFd, "\007", 1);
+ beep();
}
break;
case 16:
get_previous_history(&hp, command);
goto rewrite_line;
} else {
- xwrite(outputFd, "\007", 1);
+ beep();
}
break;
case ESC:{
get_previous_history(&hp, command);
goto rewrite_line;
} else {
- xwrite(outputFd, "\007", 1);
+ beep();
}
break;
case 'B':
get_next_history(&hp, command);
goto rewrite_line;
} else {
- xwrite(outputFd, "\007", 1);
+ beep();
}
break;
/* Rewrite the line with the selected history item */
rewrite_line:
- /* erase old command from command line */
- len = strlen(command)-strlen(hp->s);
-
- while (len>cursor)
- input_delete(command, outputFd, cursor, &len);
- while (cursor>0)
- input_backspace(command, outputFd, &cursor, &len);
- input_home(outputFd, &cursor);
-
+ /* return to begin of line */
+ input_home ();
+ /* for next memmoves without set '\0' */
+ memset (command, 0, BUFSIZ);
+ /* change command */
+ strcpy (command, hp->s);
/* write new command */
- strcpy(command, hp->s);
- len = strlen(hp->s);
- xwrite(outputFd, command, len);
- cursor = len;
+ for (j=0; command[j]; j++)
+ cmdedit_set_out_char(command[j], 0);
+ ret = cursor;
+ /* erase tail if required */
+ for (j = ret; j < len; j++)
+ cmdedit_set_out_char(' ', 0);
+ /* and backward cursor */
+ for (j = ret; j < len; j++)
+ input_backward();
+ len = cursor; /* set new len */
break;
case 'C':
/* Right Arrow -- Move forward one character */
- input_forward(outputFd, &cursor, len);
+ input_forward();
break;
case 'D':
/* Left Arrow -- Move back one character */
- input_backward(outputFd, &cursor);
+ input_backward();
break;
case '3':
/* Delete */
- input_delete(command, outputFd, cursor, &len);
+ input_delete();
break;
case '1':
/* Home (Ctrl-A) */
- input_home(outputFd, &cursor);
+ input_home();
break;
case '4':
/* End (Ctrl-E) */
- input_end(outputFd, &cursor, len);
+ input_end();
break;
default:
- xwrite(outputFd, "\007", 1);
+ beep();
}
if (c == '1' || c == '3' || c == '4')
if ((ret = read(inputFd, &c, 1)) < 1)
switch (c) {
case 'H':
/* Home (xterm) */
- input_home(outputFd, &cursor);
+ input_home();
break;
case 'F':
/* End (xterm) */
- input_end(outputFd, &cursor, len);
+ input_end();
break;
default:
- xwrite(outputFd, "\007", 1);
+ beep();
}
}
c = 0;
if (cursor == (len - 1)) { /* Append if at the end of the line */
*(command + cursor) = c;
+ cmdedit_set_out_char(c, command[cursor+1]);
} else { /* Insert otherwise */
memmove(command + cursor + 1, command + cursor,
len - cursor - 1);
*(command + cursor) = c;
-
- for (j = cursor; j < len; j++)
- xwrite(outputFd, command + j, 1);
- for (; j > cursor; j--)
- xwrite(outputFd, "\033[D", 3);
+ j = cursor+1;
+ /* rewrite from cursor */
+ input_end ();
+ /* to prev x pos + 1 */
+ while(cursor > j)
+ input_backward();
}
- cursor++;
- xwrite(outputFd, &c, 1);
break;
}
if (c == '\t')
break;
}
- nr = len + 1;
- setTermSettings(inputFd, (void *) &initial_settings);
- reset_term = 0;
-
+ setTermSettings (inputFd, (void *) &initial_settings);
+ handlers_sets &= ~SET_RESET_TERM;
/* Handle command history log */
- if (*(command)) {
+ if (len>1) { /* no put empty line (only '\n') */
struct history *h = his_end;
+ char *ss;
+
+ command[len-1] = 0; /* destroy end '\n' */
+ ss = strdup(command); /* duplicate without '\n' */
+ command[len-1] = '\n'; /* restore '\n' */
if (!h) {
/* No previous history -- this memory is never freed */
- h = his_front = malloc(sizeof(struct history));
- h->n = malloc(sizeof(struct history));
+ h = his_front = xmalloc(sizeof(struct history));
+ h->n = xmalloc(sizeof(struct history));
h->p = NULL;
- h->s = strdup(command);
+ h->s = ss;
h->n->p = h;
h->n->n = NULL;
h->n->s = NULL;
history_counter++;
} else {
/* Add a new history command -- this memory is never freed */
- h->n = malloc(sizeof(struct history));
+ h->n = xmalloc(sizeof(struct history));
h->n->p = h;
h->n->n = NULL;
h->n->s = NULL;
- h->s = strdup(command);
+ h->s = ss;
his_end = h->n;
/* After max history, remove the oldest command */
return;
}
-extern void cmdedit_init(void)
-{
- 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.
-*/
+/* Undo the effects of cmdedit_init(). */
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);
+ if((handlers_sets & SET_TERM_HANDLERS)!=0) {
+ signal(SIGKILL, SIG_DFL);
+ signal(SIGINT, SIG_DFL);
+ signal(SIGQUIT, SIG_DFL);
+ signal(SIGTERM, SIG_DFL);
+ signal(SIGWINCH, SIG_DFL);
+ handlers_sets &= ~SET_TERM_HANDLERS;
+ }
}
-#endif /* BB_FEATURE_SH_COMMAND_EDITING */
+#endif /* BB_FEATURE_SH_COMMAND_EDITING */
projects / oweals / busybox.git / blobdiff