+/* 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.
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 <unistd.h>
#include <stdlib.h>
#include <string.h>
-#include <termio.h>
+#include <sys/ioctl.h>
#include <ctype.h>
#include <signal.h>
-#include "cmdedit.h"
+#ifdef BB_FEATURE_SH_TAB_COMPLETION
+#include <sys/stat.h>
+#endif
+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_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 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 */
+/* ED: sparc termios is broken: revert back to old termio handling. */
+
+#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
+
+
+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;
+
struct history {
- char *s;
- struct history *p;
- struct history *n;
+ char *s;
+ struct history *p;
+ struct history *n;
};
+static void cmdedit_setwidth(int w, int redraw_flg);
-/* Version of write which resumes after a signal is caught. */
-int xwrite(int fd, char *buf, int nbytes)
+static void win_changed(int nsig)
{
- 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;
+ 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 */
}
+static void cmdedit_reset_term(void)
+{
+ 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;
+ //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
+}
+
+
+
+/* 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++;
+}
+
+/* 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);
+}
+
+
+static inline void out1str(const char *s) { fputs (s, stdout); }
+static inline void beep (void) { putchar('\007'); }
-/* Version of ioctl that retries after a signal is caught. */
-int xioctl(int fd, unsigned long request, char *arg)
+/* Go to HOME position */
+static void input_home(void)
{
- int i;
- while ((i = ioctl(fd, request, arg)) == -1 && errno == EINTR);
- return i;
+ 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;
+
}
+/* 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++;
+ }
+ }
+ }
+}
-void cmdedit_reset_term(void)
+/* Delete the char in front of the cursor */
+static void input_delete(void)
{
- if (reset_term)
- xioctl(fileno(stdin), TCSETA, (void *) &old_term);
+ int j = cursor;
+
+ if (j == len)
+ return;
+
+ 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 */
}
-void gotaSignal(int sig)
+/* Delete the char in back of the cursor */
+static void input_backspace(void)
{
- cmdedit_reset_term();
- fprintf(stdout, "\n");
- exit(TRUE);
+ if (cursor > 0) {
+ input_backward();
+ input_delete ();
+ }
}
-void input_home(int outputFd, int *cursor)
-{ /* Command line input routines */
- while (*cursor > 0) {
- xwrite(outputFd, "\b", 1);
- --*cursor;
- }
+
+/* Move forward one charactor */
+static void input_forward(void)
+{
+ if (cursor < len)
+ cmdedit_set_out_char(command_ps[cursor], command_ps[cursor + 1]);
}
-void input_delete(int outputFd, int cursor)
+static void clean_up_and_die(int sig)
{
- 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);
- }
+ goto_new_line();
+ if (sig!=SIGINT)
+ exit(EXIT_SUCCESS); /* cmdedit_reset_term() called in atexit */
+ cmdedit_reset_term();
+}
+
+static void cmdedit_setwidth(int w, int redraw_flg)
+{
+ cmdedit_termw = cmdedit_prmt_len+2;
+ if (w > cmdedit_termw) {
- xwrite(outputFd, " \b", 2);
+ cmdedit_termw = w;
- while (j-- > cursor)
- xwrite(outputFd, "\b", 1);
+ 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\n", 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
-void input_end(int outputFd, int *cursor, int len)
+#ifdef BB_FEATURE_USERNAME_COMPLETION
+static char** username_tab_completion(char *ud, int *num_matches)
{
- while (*cursor < len) {
- xwrite(outputFd, "\033[C", 3);
- ++*cursor;
+ static struct passwd *entry;
+ int userlen;
+ char **matches = (char **) NULL;
+ 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,
+};
-void input_backspace(int outputFd, int *cursor, int *len)
+#include <dirent.h>
+
+static int path_parse(char ***p, int flags)
{
- int j = 0;
-
- if (*cursor > 0) {
- xwrite(outputFd, "\b \b", 3);
- --*cursor;
- 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);
+ 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;
}
- xwrite(outputFd, " \b", 2);
+ tmp = pth;
+ npth=0;
+
+ for(;;) {
+ npth++; /* count words is + 1 count ':' */
+ tmp = strchr(tmp, ':');
+ if(tmp)
+ tmp++;
+ else
+ break;
+ }
- while (j-- > *cursor)
- xwrite(outputFd, "\b", 1);
+ *p = xmalloc(npth*sizeof(char *));
- --*len;
- }
+ 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;
}
-extern int cmdedit_read_input(int inputFd, int outputFd,
- char command[BUFSIZ])
+static char** exe_n_cwd_tab_completion(char* command, int *num_matches, int type)
{
+ char *dirName;
+ 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);
+
+ paths = xmalloc(sizeof(char*));
+ paths[0] = dirbuf;
+ npaths = 1; /* only 1 dir */
+ }
- int nr = 0;
- int len = 0;
- int j = 0;
- int cursor = 0;
- int break_out = 0;
- int ret = 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);
- reset_term = 1;
- } else {
- xioctl(inputFd, TCSETA, (void *) &new_term);
- }
+ for(i=0; i < npaths; i++) {
- memset(parsenextc, 0, BUFSIZ);
-
- while (1) {
-
- if ((ret = read(inputFd, &c, 1)) < 1)
- return ret;
-
- switch (c) {
- case 1: /* Control-A Beginning of line */
- input_home(outputFd, &cursor);
- break;
- case 5: /* Control-E EOL */
- input_end(outputFd, &cursor, len);
- break;
- case 4: /* Control-D */
- if (cursor != len) {
- input_delete(outputFd, cursor);
- len--;
- }
- break;
- case '\b': /* Backspace */
- case DEL:
- 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;
-
- if (c == '[') { /* 91 */
- if ((ret = read(inputFd, &c, 1)) < 1)
- return ret;
+ dir = opendir(paths[i]);
+ if (!dir) {
+ /* Don't print an error, just shut up and return */
+ return (matches);
+ }
+ while ((next = readdir(dir)) != NULL) {
+ /* 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, " ");
+ }
+ /* 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);
+}
- switch (c) {
- case 'A':
- if (hp && hp->p) { /* Up */
- hp = hp->p;
- goto hop;
- }
- break;
- case 'B':
- if (hp && hp->n && hp->n->s) { /* Down */
- hp = hp->n;
- goto hop;
- }
- break;
-
- hop: /* hop */
- len = strlen(parsenextc);
-
- for (; cursor > 0; cursor--) /* return to begining of line */
- xwrite(outputFd, "\b", 1);
-
- for (j = 0; j < len; j++) /* erase old command */
- xwrite(outputFd, " ", 1);
-
- for (j = len; j > 0; j--) /* return to begining of line */
- xwrite(outputFd, "\b", 1);
-
- strcpy(parsenextc, hp->s); /* write new command */
- len = strlen(hp->s);
- xwrite(outputFd, parsenextc, len);
- cursor = len;
- break;
- case 'C': /* Right */
- if (cursor < len) {
- xwrite(outputFd, "\033[C", 3);
- cursor++;
- }
- break;
- case 'D': /* Left */
- if (cursor > 0) {
- xwrite(outputFd, "\033[D", 3);
- cursor--;
- }
- break;
- case '3': /* Delete */
- if (cursor != len) {
- input_delete(outputFd, cursor);
- len--;
- }
- break;
- case '1': /* Home (Ctrl-A) */
- input_home(outputFd, &cursor);
- break;
- case '4': /* End (Ctrl-E) */
- input_end(outputFd, &cursor, len);
- break;
+static void input_tab(int lastWasTab)
+{
+ /* Do TAB completion */
+ 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;
+ int len_found;
+
+ /* 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 */
+ memset(matchBuf, 0, BUFSIZ);
+ tmp = strncpy(matchBuf, command_ps, cursor);
+
+ /* skip past any command seperator tokens */
+ while ( (tmp1=strpbrk(tmp, ";|&{(`")) != NULL) {
+ tmp = ++tmp1;
}
- if (c == '1' || c == '3' || c == '4')
- if ((ret = read(inputFd, &c, 1)) < 1)
- return ret; /* read 126 (~) */
- }
- if (c == 'O') { /* 79 */
- if ((ret = read(inputFd, &c, 1)) < 1)
- return ret;
- switch (c) {
- case 'H': /* Home (xterm) */
- input_home(outputFd, &cursor);
- break;
- case 'F': /* End (xterm) */
- input_end(outputFd, &cursor, len);
- break;
+
+ /* skip any leading white space */
+ 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;
}
- }
- c = 0;
- break;
- default: /* If it's regular input, do the normal thing */
+#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. */
- if (!isprint(c)) /* Skip non-printable characters */
- break;
+ 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(matchBuf, &num_matches, find_type);
+
+ /* Did we find exactly one match? */
+ if(!matches || num_matches>1) {
+ beep();
+ return;
+ }
- if (len >= (BUFSIZ - 2)) /* Need to leave space for enter */
- break;
+ len_found = strlen(matches[0]);
- len++;
+ /* have space to placed match? */
+ if ( (len_found-strlen(matchBuf)+len) < BUFSIZ ) {
- if (cursor == (len - 1)) { /* Append if at the end of the line */
- *(parsenextc + cursor) = c;
- } else { /* Insert otherwise */
- memmove(parsenextc + cursor + 1, parsenextc + cursor,
- len - cursor - 1);
+ int recalc_pos = len;
- *(parsenextc + cursor) = c;
+ /* before word for match */
+ command_ps[pos-strlen(matchBuf)]=0;
- for (j = cursor; j < len; j++)
- xwrite(outputFd, parsenextc + j, 1);
- for (; j > cursor; j--)
- xwrite(outputFd, "\033[D", 3);
- }
+ /* tail line */
+ strcpy(matchBuf, command_ps+pos);
- cursor++;
- xwrite(outputFd, &c, 1);
- break;
+ /* add match */
+ strcat(command_ps, matches[0]);
+ /* add tail */
+ strcat(command_ps, matchBuf);
+
+ /* write out the matched command */
+ 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
+ * just hit TAB again, print a list of all the
+ * available choices... */
+ if ( matches && num_matches>0 ) {
+ int i, col;
+ int sav_cursor = cursor;
+
+ /* Go to the next line */
+ goto_new_line();
+ for (i=0,col=0; i<num_matches; i++) {
+ printf("%s ", matches[i]);
+ col += strlen(matches[i])+2;
+ col -= (col/cmdedit_termw)*cmdedit_termw;
+ if (col > 60 && matches[i+1] != NULL) {
+ putchar('\n');
+ col = 0;
+ }
+ }
+ /* 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 */
+ while (sav_cursor < cursor)
+ input_backward();
+ }
}
+}
+#endif
- if (break_out) /* Enter is the command terminator, no more input. */
- break;
- }
+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
+ * a string with full command editing (sortof like
+ * a mini readline).
+ *
+ * The following standard commands are not implemented:
+ * ESC-b -- Move back one word
+ * ESC-f -- Move forward one word
+ * ESC-d -- Delete back one word
+ * ESC-h -- Delete forward one word
+ * CTL-t -- Transpose two characters
+ *
+ * Furthermore, the "vi" command editing keys are not implemented.
+ *
+ * TODO: implement TAB command completion. :)
+ */
+extern void cmdedit_read_input(char* prompt, char command[BUFSIZ])
+{
- nr = len + 1;
- xioctl(inputFd, TCSETA, (void *) &old_term);
- reset_term = 0;
+ int inputFd=fileno(stdin);
+
+ int j = 0;
+ int break_out = 0;
+ int ret = 0;
+ int lastWasTab = FALSE;
+ char c = 0;
+ struct history *hp = his_end;
+
+ 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[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 */
+ }
+ setTermSettings(inputFd, (void*) &new_settings);
+ handlers_sets |= SET_RESET_TERM;
+ memset(command, 0, BUFSIZ);
- if (*(parsenextc)) { /* Handle command history log */
+ cmdedit_init();
- struct history *h = his_end;
+ /* 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 */
- if (!h) { /* No previous history */
- h = his_front = malloc(sizeof(struct history));
- h->n = malloc(sizeof(struct history));
- h->p = NULL;
- h->s = strdup(parsenextc);
- h->n->p = h;
- h->n->n = NULL;
- h->n->s = NULL;
- his_end = h->n;
- history_counter++;
- } else { /* Add a new history command */
+ while (1) {
- h->n = malloc(sizeof(struct history));
+ fflush(stdout); /* buffered out to fast */
- h->n->p = h;
- h->n->n = NULL;
- h->n->s = NULL;
- h->s = strdup(parsenextc);
- his_end = h->n;
+ if ((ret = read(inputFd, &c, 1)) < 1)
+ return;
+ //fprintf(stderr, "got a '%c' (%d)\n", c, c);
- if (history_counter >= MAX_HISTORY) { /* After max history, remove the last known command */
+ switch (c) {
+ case '\n':
+ case '\r':
+ /* Enter */
+ *(command + len) = c;
+ len++;
+ input_end ();
+ break_out = 1;
+ break;
+ case 1:
+ /* Control-a -- Beginning of line */
+ input_home();
+ break;
+ case 2:
+ /* Control-b -- Move back one character */
+ input_backward();
+ 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 */
+ goto_new_line();
+
+#if 0
+ /* Rewrite the prompt */
+ printf("%s", 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) {
+ printf("exit");
+ clean_up_and_die(0);
+ } else {
+ input_delete();
+ }
+ break;
+ case 5:
+ /* Control-e -- End of line */
+ input_end();
+ break;
+ case 6:
+ /* Control-f -- Move forward one character */
+ input_forward();
+ break;
+ case '\b':
+ case DEL:
+ /* Control-h and DEL */
+ input_backspace();
+ break;
+ case '\t':
+#ifdef BB_FEATURE_SH_TAB_COMPLETION
+ input_tab(lastWasTab);
+#endif
+ break;
+ 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 {
+ beep();
+ }
+ break;
+ case 16:
+ /* Control-p -- Get previous command from history */
+ if (hp && hp->p) {
+ get_previous_history(&hp, command);
+ goto rewrite_line;
+ } else {
+ beep();
+ }
+ break;
+ case ESC:{
+ /* escape sequence follows */
+ if ((ret = read(inputFd, &c, 1)) < 1)
+ return;
+
+ if (c == '[') { /* 91 */
+ if ((ret = read(inputFd, &c, 1)) < 1)
+ return;
+
+ switch (c) {
+ case 'A':
+ /* Up Arrow -- Get previous command from history */
+ if (hp && hp->p) {
+ get_previous_history(&hp, command);
+ goto rewrite_line;
+ } else {
+ beep();
+ }
+ break;
+ case 'B':
+ /* Down Arrow -- Get next command in history */
+ if (hp && hp->n && hp->n->s) {
+ get_next_history(&hp, command);
+ goto rewrite_line;
+ } else {
+ beep();
+ }
+ break;
+
+ /* Rewrite the line with the selected history item */
+ rewrite_line:
+ /* 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 */
+ 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();
+ break;
+ case 'D':
+ /* Left Arrow -- Move back one character */
+ input_backward();
+ break;
+ case '3':
+ /* Delete */
+ input_delete();
+ break;
+ case '1':
+ /* Home (Ctrl-A) */
+ input_home();
+ break;
+ case '4':
+ /* End (Ctrl-E) */
+ input_end();
+ break;
+ default:
+ beep();
+ }
+ if (c == '1' || c == '3' || c == '4')
+ if ((ret = read(inputFd, &c, 1)) < 1)
+ return; /* read 126 (~) */
+ }
+ if (c == 'O') {
+ /* 79 */
+ if ((ret = read(inputFd, &c, 1)) < 1)
+ return;
+ switch (c) {
+ case 'H':
+ /* Home (xterm) */
+ input_home();
+ break;
+ case 'F':
+ /* End (xterm) */
+ input_end();
+ break;
+ default:
+ beep();
+ }
+ }
+ c = 0;
+ break;
+ }
+
+ default: /* If it's regular input, do the normal thing */
+
+ 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 */
+ *(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;
+ j = cursor+1;
+ /* rewrite from cursor */
+ input_end ();
+ /* to prev x pos + 1 */
+ while(cursor > j)
+ input_backward();
+ }
+
+ break;
+ }
+ if (c == '\t')
+ lastWasTab = TRUE;
+ else
+ lastWasTab = FALSE;
- struct history *p = his_front->n;
+ if (break_out) /* Enter is the command terminator, no more input. */
+ break;
+ }
- p->p = NULL;
- free(his_front->s);
- free(his_front);
- his_front = p;
- } else {
- history_counter++;
- }
+ setTermSettings (inputFd, (void *) &initial_settings);
+ handlers_sets &= ~SET_RESET_TERM;
+
+ /* Handle command history log */
+ 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 = xmalloc(sizeof(struct history));
+ h->n = xmalloc(sizeof(struct history));
+
+ h->p = NULL;
+ h->s = ss;
+ h->n->p = h;
+ h->n->n = NULL;
+ h->n->s = NULL;
+ his_end = h->n;
+ history_counter++;
+ } else {
+ /* 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 = ss;
+ his_end = h->n;
+
+ /* After max history, remove the oldest command */
+ if (history_counter >= MAX_HISTORY) {
+
+ struct history *p = his_front->n;
+
+ p->p = NULL;
+ free(his_front->s);
+ free(his_front);
+ his_front = p;
+ } else {
+ history_counter++;
+ }
+ }
}
- }
- return nr;
+ return;
}
-extern void cmdedit_init(void)
+
+/* Undo the effects of cmdedit_init(). */
+extern void cmdedit_terminate(void)
{
- atexit(cmdedit_reset_term);
- signal(SIGINT, gotaSignal);
- signal(SIGQUIT, gotaSignal);
- signal(SIGTERM, gotaSignal);
+ cmdedit_reset_term();
+ 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