+/* vi: set sw=4 ts=4: */
/*
- * 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>
+ * Termios command line History and Editting.
*
- * 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.
+ * Copyright (c) 1986-2001 may safely be consumed by a BSD or GPL license.
+ * Written by: Vladimir Oleynik <vodz@usa.net>
+ *
+ * Used ideas:
+ * Adam Rogoyski <rogoyski@cs.utexas.edu>
+ * Dave Cinege <dcinege@psychosis.com>
+ * Jakub Jelinek (c) 1995
+ * Erik Andersen <andersee@debian.org> (Majorly adjusted for busybox)
*
- * v 0.5 19990328 Initial release
+ * This code is 'as is' with no warranty.
*
- * Future plans: Simple file and path name completion. (like BASH)
*
*/
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.
+ Small bugs (simple effect):
+ - not true viewing if terminal size (x*y symbols) less
+ size (prompt + editor`s line + 2 symbols)
*/
-#include "internal.h"
-#ifdef BB_FEATURE_SH_COMMAND_EDITING
+
+//#define TEST
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
-#include <termio.h>
+#include <sys/ioctl.h>
#include <ctype.h>
#include <signal.h>
+#include <limits.h>
-#include "cmdedit.h"
+#ifndef TEST
+#include "busybox.h"
-#define MAX_HISTORY 15 /* Maximum length of the linked list for the command line history */
+#define D(x)
-#define ESC 27
-#define DEL 127
+#else
-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 */
+#define BB_FEATURE_SH_COMMAND_EDITING
+#define BB_FEATURE_SH_TAB_COMPLETION
+#define BB_FEATURE_SH_USERNAME_COMPLETION
+#define BB_FEATURE_NONPRINTABLE_INVERSE_PUT
+#define BB_FEATURE_BASH_STYLE_PROMT
+#define BB_FEATURE_CLEAN_UP
+
+#define D(x) x
+
+#endif /* TEST */
+
+#ifdef BB_FEATURE_SH_TAB_COMPLETION
+#include <dirent.h>
+#include <sys/stat.h>
+#endif
+
+#ifdef BB_FEATURE_SH_COMMAND_EDITING
+
+#ifndef BB_FEATURE_SH_TAB_COMPLETION
+#undef BB_FEATURE_SH_USERNAME_COMPLETION
+#endif
+
+#if defined(BB_FEATURE_SH_USERNAME_COMPLETION) || defined(BB_FEATURE_BASH_STYLE_PROMT)
+#define BB_FEATURE_GETUSERNAME_AND_HOMEDIR
+#endif
+
+#ifdef BB_FEATURE_GETUSERNAME_AND_HOMEDIR
+#ifndef TEST
+#include "pwd_grp/pwd.h"
+#else
+#include <pwd.h>
+#endif /* TEST */
+#endif /* advanced FEATURES */
+
+
+#ifdef TEST
+void *xrealloc(void *old, size_t size)
+{
+ return realloc(old, size);
+}
+
+void *xmalloc(size_t size)
+{
+ return malloc(size);
+}
+char *xstrdup(const char *s)
+{
+ return strdup(s);
+}
+
+void *xcalloc(size_t size, size_t se)
+{
+ return calloc(size, se);
+}
+
+#define error_msg(s, d) fprintf(stderr, s, d)
+#endif
-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;
- struct history *p;
- struct history *n;
+ char *s;
+ struct history *p;
+ struct history *n;
};
+/* Maximum length of the linked list for the command line history */
+static const int MAX_HISTORY = 15;
+
+/* First element in command line list */
+static struct history *his_front = NULL;
+
+/* Last element in command line list */
+static struct history *his_end = NULL;
+
+
+/* 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 = 80; /* actual terminal width */
+static int history_counter = 0; /* Number of commands in history list */
+static
+volatile int handlers_sets = 0; /* Set next bites: */
+
+enum {
+ SET_ATEXIT = 1, /* when atexit() has been called and
+ get euid,uid,gid to fast compare */
+ SET_TERM_HANDLERS = 2, /* set many terminates signal handlers */
+ SET_WCHG_HANDLERS = 4, /* winchg signal handler */
+ SET_RESET_TERM = 8, /* if the terminal needs to be reset upon exit */
+};
+
+
+static int cmdedit_x; /* real x terminal position */
+static int cmdedit_y; /* pseudoreal y terminal position */
+static int cmdedit_prmt_len; /* lenght prompt without colores string */
+
+static int cursor; /* required global for signal handler */
+static int len; /* --- "" - - "" - -"- --""-- --""--- */
+static char *command_ps; /* --- "" - - "" - -"- --""-- --""--- */
+static
+#ifndef BB_FEATURE_BASH_STYLE_PROMT
+ const
+#endif
+char *cmdedit_prompt; /* --- "" - - "" - -"- --""-- --""--- */
+
+/* Link into lash to reset context to 0 on ^C and such */
+extern unsigned int shell_context;
+
+
+#ifdef BB_FEATURE_GETUSERNAME_AND_HOMEDIR
+static char *user_buf = "";
+static char *home_pwd_buf = "";
+static int my_euid;
+#endif
+
+#ifdef BB_FEATURE_BASH_STYLE_PROMT
+static char *hostname_buf = "";
+static int num_ok_lines = 1;
+#endif
+
+
+#ifdef BB_FEATURE_SH_TAB_COMPLETION
+
+#ifndef BB_FEATURE_GETUSERNAME_AND_HOMEDIR
+static int my_euid;
+#endif
+
+static int my_uid;
+static int my_gid;
+
+#endif /* BB_FEATURE_SH_TAB_COMPLETION */
-/* Version of write which resumes after a signal is caught. */
-int xwrite(int fd, char *buf, int nbytes)
+
+static void cmdedit_setwidth(int w, int redraw_flg);
+
+static void win_changed(int nsig)
{
- int ntry;
- int i;
- int n;
+ struct winsize win = { 0, 0, 0, 0 };
+ static __sighandler_t previous_SIGWINCH_handler; /* for reset */
+
+ /* emulate || signal call */
+ if (nsig == -SIGWINCH || nsig == SIGWINCH) {
+ ioctl(0, TIOCGWINSZ, &win);
+ if (win.ws_col > 0) {
+ cmdedit_setwidth(win.ws_col, 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 /* nsig == 0 */
+ /* set previous handler */
+ signal(SIGWINCH, previous_SIGWINCH_handler); /* reset */
+}
- 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;
+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
}
-/* Version of ioctl that retries after a signal is caught. */
-int xioctl(int fd, unsigned long request, char *arg)
+/* special for recount position for scroll and remove terminal margin effect */
+static void cmdedit_set_out_char(int next_char)
{
- int i;
- while ((i = ioctl(fd, request, arg)) == -1 && errno == EINTR);
- return i;
+
+ int c = command_ps[cursor];
+
+ if (c == 0)
+ c = ' '; /* destroy end char? */
+#ifdef BB_FEATURE_NONPRINTABLE_INVERSE_PUT
+ if (!isprint(c)) { /* Inverse put non-printable characters */
+ if (((unsigned char) c) >= 128)
+ c -= 128;
+ if (((unsigned char) c) < ' ')
+ c += '@';
+ if (c == 127)
+ c = '?';
+ printf("\033[7m%c\033[0m", c);
+ } else
+#endif
+ 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 */
+static void input_end(void)
+{
+ while (cursor < len)
+ cmdedit_set_out_char(0);
+}
-void cmdedit_reset_term(void)
+/* Go to the next line */
+static void goto_new_line(void)
{
- if (reset_term)
- xioctl(fileno(stdin), TCSETA, (void *) &old_term);
+ input_end();
+ if (cmdedit_x)
+ putchar('\n');
}
-void gotaSignal(int sig)
+
+static inline void out1str(const char *s)
{
- cmdedit_reset_term();
- fprintf(stdout, "\n");
- exit(TRUE);
+ fputs(s, stdout);
+}
+static inline void beep(void)
+{
+ putchar('\007');
}
-void input_home(int outputFd, int *cursor)
-{ /* Command line input routines */
- while (*cursor > 0) {
- xwrite(outputFd, "\b", 1);
- --*cursor;
- }
+/* Move back one charactor */
+/* special for slow terminal */
+static void input_backward(int num)
+{
+ if (num > cursor)
+ num = cursor;
+ cursor -= num; /* new cursor (in command, not terminal) */
+
+ if (cmdedit_x >= num) { /* no to up line */
+ cmdedit_x -= num;
+ if (num < 4)
+ while (num-- > 0)
+ putchar('\b');
+
+ else
+ printf("\033[%dD", num);
+ } else {
+ int count_y;
+
+ if (cmdedit_x) {
+ putchar('\r'); /* back to first terminal pos. */
+ num -= cmdedit_x; /* set previous backward */
+ }
+ count_y = 1 + num / cmdedit_termw;
+ printf("\033[%dA", count_y);
+ cmdedit_y -= count_y;
+ /* require forward after uping */
+ cmdedit_x = cmdedit_termw * count_y - num;
+ printf("\033[%dC", cmdedit_x); /* set term cursor */
+ }
}
+static void put_prompt(void)
+{
+ out1str(cmdedit_prompt);
+ cmdedit_x = cmdedit_prmt_len; /* count real x terminal position */
+ cursor = 0;
+}
-void input_delete(int outputFd, int cursor)
+#ifdef BB_FEATURE_BASH_STYLE_PROMT
+static void
+add_to_prompt(char **prmt_mem_ptr, int *alm, int *prmt_len,
+ const char *addb)
{
- int j = 0;
+ int l = strlen(addb);
+
+ *prmt_len += l;
+ if (*alm < (*prmt_len) + 1) {
+ *alm = (*prmt_len) + 1;
+ *prmt_mem_ptr = xrealloc(*prmt_mem_ptr, *alm);
+ }
+ strcat(*prmt_mem_ptr, addb);
+}
+#endif
- 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);
- }
+static void parse_prompt(const char *prmt_ptr)
+{
+#ifdef BB_FEATURE_BASH_STYLE_PROMT
+ int alm = strlen(prmt_ptr) + 1; /* supposedly require memory */
+ int prmt_len = 0;
+ int sub_len = 0;
+ int flg_not_length = '[';
+ char *prmt_mem_ptr = xstrdup(prmt_ptr);
+ char pwd_buf[PATH_MAX + 1];
+ char buf[16];
+ int c;
+
+ pwd_buf[0] = 0;
+ *prmt_mem_ptr = 0;
+
+ while (*prmt_ptr) {
+ c = *prmt_ptr++;
+ if (c == '\\') {
+ c = *prmt_ptr;
+ if (c == 0)
+ break;
+ prmt_ptr++;
+ switch (c) {
+ case 'u':
+ add_to_prompt(&prmt_mem_ptr, &alm, &prmt_len, user_buf);
+ continue;
+ case 'h':
+ if (hostname_buf[0] == 0) {
+ hostname_buf = xcalloc(256, 1);
+ if (gethostname(hostname_buf, 255) < 0) {
+ strcpy(hostname_buf, "?");
+ } else {
+ char *s = strchr(hostname_buf, '.');
+
+ if (s)
+ *s = 0;
+ }
+ }
+ add_to_prompt(&prmt_mem_ptr, &alm, &prmt_len,
+ hostname_buf);
+ continue;
+ case '$':
+ c = my_euid == 0 ? '#' : '$';
+ break;
+ case 'w':
+ if (pwd_buf[0] == 0) {
+ int l;
+
+ getcwd(pwd_buf, PATH_MAX);
+ l = strlen(home_pwd_buf);
+ if (home_pwd_buf[0] != 0 &&
+ strncmp(home_pwd_buf, pwd_buf, l) == 0) {
+ strcpy(pwd_buf + 1, pwd_buf + l);
+ pwd_buf[0] = '~';
+ }
+ }
+ add_to_prompt(&prmt_mem_ptr, &alm, &prmt_len, pwd_buf);
+ continue;
+ case '!':
+ snprintf(buf, sizeof(buf), "%d", num_ok_lines);
+ add_to_prompt(&prmt_mem_ptr, &alm, &prmt_len, buf);
+ continue;
+ case 'e':
+ case 'E': /* \e \E = \033 */
+ c = '\033';
+ break;
+ case 'x':
+ case 'X':
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':{
+ int l;
+ int ho = 0;
+ char *eho;
+
+ if (c == 'X')
+ c = 'x';
+
+ for (l = 0; l < 3;) {
+
+ buf[l++] = *prmt_ptr;
+ buf[l] = 0;
+ ho = strtol(buf, &eho, c == 'x' ? 16 : 8);
+ if (ho > UCHAR_MAX || (eho - buf) < l) {
+ l--;
+ break;
+ }
+ prmt_ptr++;
+ }
+ buf[l] = 0;
+ ho = strtol(buf, 0, c == 'x' ? 16 : 8);
+ c = ho == 0 ? '?' : (char) ho;
+ break;
+ }
+ case '[':
+ case ']':
+ if (c == flg_not_length) {
+ flg_not_length = flg_not_length == '[' ? ']' : '[';
+ continue;
+ }
+ break;
+ }
+ }
+ buf[0] = c;
+ buf[1] = 0;
+ add_to_prompt(&prmt_mem_ptr, &alm, &prmt_len, buf);
+ if (flg_not_length == ']')
+ sub_len++;
+ }
+ cmdedit_prmt_len = prmt_len - sub_len;
+ cmdedit_prompt = prmt_mem_ptr;
+#else
+ cmdedit_prompt = prmt_ptr;
+ cmdedit_prmt_len = strlen(prmt_ptr);
+#endif
+ put_prompt();
+}
- xwrite(outputFd, " \b", 2);
- while (j-- > cursor)
- xwrite(outputFd, "\b", 1);
+/* draw promt, editor line, and clear tail */
+static void redraw(int y, int back_cursor)
+{
+ if (y > 0) /* up to start y */
+ printf("\033[%dA", y);
+ cmdedit_y = 0; /* new quasireal y */
+ putchar('\r');
+ put_prompt();
+ input_end(); /* rewrite */
+ printf("\033[J"); /* destroy tail after cursor */
+ input_backward(back_cursor);
}
+/* Delete the char in front of the cursor */
+static void input_delete(void)
+{
+ int j = cursor;
+
+ if (j == len)
+ return;
+
+ strcpy(command_ps + j, command_ps + j + 1);
+ len--;
+ input_end(); /* rewtite new line */
+ cmdedit_set_out_char(0); /* destroy end char */
+ input_backward(cursor - j); /* back to old pos cursor */
+}
-void input_end(int outputFd, int *cursor, int len)
+/* Delete the char in back of the cursor */
+static void input_backspace(void)
{
- while (*cursor < len) {
- xwrite(outputFd, "\033[C", 3);
- ++*cursor;
- }
+ if (cursor > 0) {
+ input_backward(1);
+ input_delete();
+ }
}
-void input_backspace(int outputFd, int *cursor, int *len)
+/* Move forward one charactor */
+static void input_forward(void)
{
- int j = 0;
+ if (cursor < len)
+ cmdedit_set_out_char(command_ps[cursor + 1]);
+}
+
- if (*cursor > 0) {
- xwrite(outputFd, "\b \b", 3);
- --*cursor;
- memmove(parsenextc + *cursor, parsenextc + *cursor + 1,
- BUFSIZ - *cursor + 1);
+static void clean_up_and_die(int sig)
+{
+ goto_new_line();
+ if (sig != SIGINT)
+ exit(EXIT_SUCCESS); /* cmdedit_reset_term() called in atexit */
+ cmdedit_reset_term();
+}
- for (j = *cursor; j < (BUFSIZ - 1); j++) {
- if (!*(parsenextc + j))
- break;
- else
- xwrite(outputFd, (parsenextc + j), 1);
+static void cmdedit_setwidth(int w, int redraw_flg)
+{
+ cmdedit_termw = cmdedit_prmt_len + 2;
+ if (w <= cmdedit_termw) {
+ cmdedit_termw = cmdedit_termw % w;
}
+ if (w > cmdedit_termw) {
- xwrite(outputFd, " \b", 2);
+ cmdedit_termw = w;
- while (j-- > *cursor)
- xwrite(outputFd, "\b", 1);
+ if (redraw_flg) {
+ /* new y for current cursor */
+ int new_y = (cursor + cmdedit_prmt_len) / w;
- --*len;
- }
+ /* redraw */
+ redraw((new_y >= cmdedit_y ? new_y : cmdedit_y), len - cursor);
+ fflush(stdout);
+ }
+ }
}
-extern int cmdedit_read_input(int inputFd, int outputFd,
- char command[BUFSIZ])
+extern void cmdedit_init(void)
{
+ if ((handlers_sets & SET_WCHG_HANDLERS) == 0) {
+ /* emulate usage handler to set handler and call yours work */
+ win_changed(-SIGWINCH);
+ handlers_sets |= SET_WCHG_HANDLERS;
+ }
- 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;
+ if ((handlers_sets & SET_ATEXIT) == 0) {
+#ifdef BB_FEATURE_GETUSERNAME_AND_HOMEDIR
+ struct passwd *entry;
+
+ my_euid = geteuid();
+ entry = getpwuid(my_euid);
+ if (entry) {
+ user_buf = xstrdup(entry->pw_name);
+ home_pwd_buf = xstrdup(entry->pw_dir);
+ }
+#endif
+
+#ifdef BB_FEATURE_SH_TAB_COMPLETION
+
+#ifndef BB_FEATURE_GETUSERNAME_AND_HOMEDIR
+ my_euid = geteuid();
+#endif
+ my_uid = getuid();
+ my_gid = getgid();
+#endif /* BB_FEATURE_SH_TAB_COMPLETION */
+ handlers_sets |= SET_ATEXIT;
+ atexit(cmdedit_reset_term); /* be sure to do this only once */
+ }
- 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);
- }
+ 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;
+ }
- memset(parsenextc, 0, BUFSIZ);
+}
- while (1) {
+#ifdef BB_FEATURE_SH_TAB_COMPLETION
- if ((ret = read(inputFd, &c, 1)) < 1)
- return ret;
+static int is_execute(const struct stat *st)
+{
+ if ((!my_euid && (st->st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))) ||
+ (my_uid == st->st_uid && (st->st_mode & S_IXUSR)) ||
+ (my_gid == st->st_gid && (st->st_mode & S_IXGRP)) ||
+ (st->st_mode & S_IXOTH)) return TRUE;
+ return FALSE;
+}
- 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;
+#ifdef BB_FEATURE_SH_USERNAME_COMPLETION
- 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 char **username_tab_completion(char *ud, int *num_matches)
+{
+ struct passwd *entry;
+ int userlen;
+ char *temp;
+
+
+ ud++; /* ~user/... to user/... */
+ userlen = strlen(ud);
+
+ if (num_matches == 0) { /* "~/..." or "~user/..." */
+ char *sav_ud = ud - 1;
+ char *home = 0;
+
+ if (*ud == '/') { /* "~/..." */
+ home = home_pwd_buf;
+ } else {
+ /* "~user/..." */
+ temp = strchr(ud, '/');
+ *temp = 0; /* ~user\0 */
+ entry = getpwnam(ud);
+ *temp = '/'; /* restore ~user/... */
+ ud = temp;
+ if (entry)
+ home = entry->pw_dir;
}
- 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;
+ if (home) {
+ if ((userlen + strlen(home) + 1) < BUFSIZ) {
+ char temp2[BUFSIZ]; /* argument size */
+
+ /* /home/user/... */
+ sprintf(temp2, "%s%s", home, ud);
+ strcpy(sav_ud, temp2);
+ }
}
- }
- c = 0;
- break;
+ return 0; /* void, result save to argument :-) */
+ } else {
+ /* "~[^/]*" */
+ char **matches = (char **) NULL;
+ int nm = 0;
- default: /* If it's regular input, do the normal thing */
+ setpwent();
- if (!isprint(c)) /* Skip non-printable characters */
- break;
+ while ((entry = getpwent()) != NULL) {
+ /* Null usernames should result in all users as possible completions. */
+ if ( /*!userlen || */ !strncmp(ud, entry->pw_name, userlen)) {
- if (len >= (BUFSIZ - 2)) /* Need to leave space for enter */
- break;
+ temp = xmalloc(3 + strlen(entry->pw_name));
+ sprintf(temp, "~%s/", entry->pw_name);
+ matches = xrealloc(matches, (nm + 1) * sizeof(char *));
- len++;
+ matches[nm++] = temp;
+ }
+ }
- 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);
+ endpwent();
+ (*num_matches) = nm;
+ return (matches);
+ }
+}
+#endif /* BB_FEATURE_SH_USERNAME_COMPLETION */
- *(parsenextc + cursor) = c;
+enum {
+ FIND_EXE_ONLY = 0,
+ FIND_DIR_ONLY = 1,
+ FIND_FILE_ONLY = 2,
+};
- for (j = cursor; j < len; j++)
- xwrite(outputFd, parsenextc + j, 1);
- for (; j > cursor; j--)
- xwrite(outputFd, "\033[D", 3);
- }
+static int path_parse(char ***p, int flags)
+{
+ int npth;
+ char *tmp;
+ char *pth;
+
+ /* if not setenv PATH variable, to search cur dir "." */
+ if (flags != FIND_EXE_ONLY || (pth = getenv("PATH")) == 0 ||
+ /* PATH=<empty> or PATH=:<empty> */
+ *pth == 0 || (*pth == ':' && *(pth + 1) == 0)) {
+ return 1;
+ }
- cursor++;
- xwrite(outputFd, &c, 1);
- break;
+ tmp = pth;
+ npth = 0;
+
+ for (;;) {
+ npth++; /* count words is + 1 count ':' */
+ tmp = strchr(tmp, ':');
+ if (tmp) {
+ if (*++tmp == 0)
+ break; /* :<empty> */
+ } else
+ break;
}
- if (break_out) /* Enter is the command terminator, no more input. */
- 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' */
+ if (*++tmp == 0)
+ break; /* :<empty> */
+ } else
+ break;
+ (*p)[npth++] = &(*p)[0][(tmp - pth)]; /* p[next]=p[0][&'\0'+1] */
+ }
+
+ return npth;
+}
+
+static char *add_quote_for_spec_chars(char *found)
+{
+ int l = 0;
+ char *s = xmalloc((strlen(found) + 1) * 2);
+
+ while (*found) {
+ if (strchr(" `\"#$%^&*()=+{}[]:;\'|\\<>", *found))
+ s[l++] = '\\';
+ s[l++] = *found++;
+ }
+ s[l] = 0;
+ return s;
+}
+
+static char **exe_n_cwd_tab_completion(char *command, int *num_matches,
+ int type)
+{
+
+ char **matches = 0;
+ DIR *dir;
+ struct dirent *next;
+ char dirbuf[BUFSIZ];
+ int nm = *num_matches;
+ struct stat st;
+ char *path1[1];
+ char **paths = path1;
+ int npaths;
+ int i;
+ char found[BUFSIZ + 4 + PATH_MAX];
+ char *pfind = strrchr(command, '/');
+
+ path1[0] = ".";
+
+ if (pfind == NULL) {
+ /* no dir, if flags==EXE_ONLY - get paths, else "." */
+ npaths = path_parse(&paths, type);
+ pfind = command;
+ } else {
+ /* with dir */
+ /* save for change */
+ strcpy(dirbuf, command);
+ /* set dir only */
+ dirbuf[(pfind - command) + 1] = 0;
+#ifdef BB_FEATURE_SH_USERNAME_COMPLETION
+ if (dirbuf[0] == '~') /* ~/... or ~user/... */
+ username_tab_completion(dirbuf, 0);
+#endif
+ /* "strip" dirname in command */
+ pfind++;
+
+ paths[0] = dirbuf;
+ npaths = 1; /* only 1 dir */
+ }
+
+ for (i = 0; i < npaths; i++) {
+
+ dir = opendir(paths[i]);
+ if (!dir) /* Don't print an error */
+ continue;
+
+ while ((next = readdir(dir)) != NULL) {
+ const char *str_merge = "%s/%s";
+ char *str_found = next->d_name;
+
+ /* matched ? */
+ if (strncmp(str_found, pfind, strlen(pfind)))
+ continue;
+ /* not see .name without .match */
+ if (*str_found == '.' && *pfind == 0) {
+ if (*paths[i] == '/' && paths[i][1] == 0
+ && str_found[1] == 0) str_found = ""; /* only "/" */
+ else
+ continue;
+ }
+ if (paths[i][strlen(paths[i]) - 1] == '/')
+ str_merge = "%s%s";
+ sprintf(found, str_merge, paths[i], str_found);
+ /* hmm, remover in progress? */
+ if (stat(found, &st) < 0)
+ continue;
+ /* find with dirs ? */
+ if (paths[i] != dirbuf)
+ strcpy(found, next->d_name); /* only name */
+ if (S_ISDIR(st.st_mode)) {
+ /* name is directory */
+ /* algorithmic only "/" ? */
+ if (*str_found)
+ strcat(found, "/");
+ str_found = add_quote_for_spec_chars(found);
+ } else {
+ /* not put found file if search only dirs for cd */
+ if (type == FIND_DIR_ONLY)
+ continue;
+ str_found = add_quote_for_spec_chars(found);
+ if (type == FIND_FILE_ONLY ||
+ (type == FIND_EXE_ONLY && is_execute(&st) == TRUE))
+ strcat(str_found, " ");
+ }
+ /* Add it to the list */
+ matches = xrealloc(matches, (nm + 1) * sizeof(char *));
+
+ matches[nm++] = str_found;
+ }
+ closedir(dir);
+ }
+ if (paths != path1) {
+ free(paths[0]); /* allocated memory only in first member */
+ free(paths);
+ }
+ *num_matches = nm;
+ return (matches);
+}
+
+static int match_compare(const void *a, const void *b)
+{
+ return strcmp(*(char **) a, *(char **) b);
+}
- nr = len + 1;
- xioctl(inputFd, TCSETA, (void *) &old_term);
- reset_term = 0;
- if (*(parsenextc)) { /* Handle command history log */
+#define QUOT (UCHAR_MAX+1)
- struct history *h = his_end;
+#define collapse_pos(is, in) { \
+ memcpy(int_buf+is, int_buf+in, (BUFSIZ+1-is-in)*sizeof(int)); \
+ memcpy(pos_buf+is, pos_buf+in, (BUFSIZ+1-is-in)*sizeof(int)); }
- 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);
+static int find_match(char *matchBuf, int *len_with_quotes)
+{
+ int i, j;
+ int command_mode;
+ int c, c2;
+ int int_buf[BUFSIZ + 1];
+ int pos_buf[BUFSIZ + 1];
+
+ /* set to integer dimension characters and own positions */
+ for (i = 0;; i++) {
+ int_buf[i] = (int) ((unsigned char) matchBuf[i]);
+ if (int_buf[i] == 0) {
+ pos_buf[i] = -1; /* indicator end line */
+ break;
+ } else
+ pos_buf[i] = i;
+ }
- h->n->p = h;
- h->n->n = NULL;
- h->n->s = NULL;
- his_end = h->n;
- history_counter++;
- } else { /* Add a new history command */
+ /* mask \+symbol and convert '\t' to ' ' */
+ for (i = j = 0; matchBuf[i]; i++, j++)
+ if (matchBuf[i] == '\\') {
+ collapse_pos(j, j + 1);
+ int_buf[j] |= QUOT;
+ i++;
+#ifdef BB_FEATURE_NONPRINTABLE_INVERSE_PUT
+ if (matchBuf[i] == '\t') /* algorithm equivalent */
+ int_buf[j] = ' ' | QUOT;
+#endif
+ }
+#ifdef BB_FEATURE_NONPRINTABLE_INVERSE_PUT
+ else if (matchBuf[i] == '\t')
+ int_buf[j] = ' ';
+#endif
+
+ /* mask "symbols" or 'symbols' */
+ c2 = 0;
+ for (i = 0; int_buf[i]; i++) {
+ c = int_buf[i];
+ if (c == '\'' || c == '"') {
+ if (c2 == 0)
+ c2 = c;
+ else {
+ if (c == c2)
+ c2 = 0;
+ else
+ int_buf[i] |= QUOT;
+ }
+ } else if (c2 != 0 && c != '$')
+ int_buf[i] |= QUOT;
+ }
- h->n = malloc(sizeof(struct history));
+ /* skip commands with arguments if line have commands delimiters */
+ /* ';' ';;' '&' '|' '&&' '||' but `>&' `<&' `>|' */
+ for (i = 0; int_buf[i]; i++) {
+ c = int_buf[i];
+ c2 = int_buf[i + 1];
+ j = i ? int_buf[i - 1] : -1;
+ command_mode = 0;
+ if (c == ';' || c == '&' || c == '|') {
+ command_mode = 1 + (c == c2);
+ if (c == '&') {
+ if (j == '>' || j == '<')
+ command_mode = 0;
+ } else if (c == '|' && j == '>')
+ command_mode = 0;
+ }
+ if (command_mode) {
+ collapse_pos(0, i + command_mode);
+ i = -1; /* hack incremet */
+ }
+ }
+ /* collapse `command...` */
+ for (i = 0; int_buf[i]; i++)
+ if (int_buf[i] == '`') {
+ for (j = i + 1; int_buf[j]; j++)
+ if (int_buf[j] == '`') {
+ collapse_pos(i, j + 1);
+ j = 0;
+ break;
+ }
+ if (j) {
+ /* not found close ` - command mode, collapse all previous */
+ collapse_pos(0, i + 1);
+ break;
+ } else
+ i--; /* hack incremet */
+ }
- h->n->p = h;
- h->n->n = NULL;
- h->n->s = NULL;
- h->s = strdup(parsenextc);
- his_end = h->n;
+ /* collapse (command...(command...)...) or {command...{command...}...} */
+ c = 0; /* "recursive" level */
+ c2 = 0;
+ for (i = 0; int_buf[i]; i++)
+ if (int_buf[i] == '(' || int_buf[i] == '{') {
+ if (int_buf[i] == '(')
+ c++;
+ else
+ c2++;
+ collapse_pos(0, i + 1);
+ i = -1; /* hack incremet */
+ }
+ for (i = 0; pos_buf[i] >= 0 && (c > 0 || c2 > 0); i++)
+ if ((int_buf[i] == ')' && c > 0) || (int_buf[i] == '}' && c2 > 0)) {
+ if (int_buf[i] == ')')
+ c--;
+ else
+ c2--;
+ collapse_pos(0, i + 1);
+ i = -1; /* hack incremet */
+ }
- if (history_counter >= MAX_HISTORY) { /* After max history, remove the last known command */
+ /* skip first not quote space */
+ for (i = 0; int_buf[i]; i++)
+ if (int_buf[i] != ' ')
+ break;
+ if (i)
+ collapse_pos(0, i);
+
+ /* set find mode for completion */
+ command_mode = FIND_EXE_ONLY;
+ for (i = 0; int_buf[i]; i++)
+ if (int_buf[i] == ' ' || int_buf[i] == '<' || int_buf[i] == '>') {
+ if (int_buf[i] == ' ' && command_mode == FIND_EXE_ONLY
+ && strncmp(&matchBuf[pos_buf[0]], "cd", 2) == 0)
+ command_mode = FIND_DIR_ONLY;
+ else {
+ command_mode = FIND_FILE_ONLY;
+ break;
+ }
+ }
+ /* "strlen" */
+ for (i = 0; int_buf[i]; i++);
+ /* find last word */
+ for (--i; i >= 0; i--) {
+ c = int_buf[i];
+ if (c == ' ' || c == '<' || c == '>' || c == '|' || c == '&') {
+ collapse_pos(0, i + 1);
+ break;
+ }
+ }
+ /* skip first not quoted '\'' or '"' */
+ for (i = 0; int_buf[i] == '\'' || int_buf[i] == '"'; i++);
+ /* collapse quote or unquote // or /~ */
+ while ((int_buf[i] & ~QUOT) == '/' && (
+ (int_buf[i + 1] & ~QUOT) == '/'
+ || (int_buf[i + 1] & ~QUOT) ==
+ '~')) i++;
+ if (i)
+ collapse_pos(0, i);
+
+ /* set only match and destroy quotes */
+ j = 0;
+ for (i = 0; pos_buf[i] >= 0; i++) {
+ matchBuf[i] = matchBuf[pos_buf[i]];
+ j = pos_buf[i] + 1;
+ }
+ matchBuf[i] = 0;
+ /* old lenght matchBuf with quotes symbols */
+ *len_with_quotes = j ? j - pos_buf[0] : 0;
+
+ return command_mode;
+}
- struct history *p = his_front->n;
- p->p = NULL;
- free(his_front->s);
- free(his_front);
- his_front = p;
- } else {
- history_counter++;
- }
+static void input_tab(int *lastWasTab)
+{
+ /* Do TAB completion */
+ static int num_matches;
+ static char **matches;
+
+ if (lastWasTab == 0) { /* free all memory */
+ if (matches) {
+ while (num_matches > 0)
+ free(matches[--num_matches]);
+ free(matches);
+ matches = (char **) NULL;
+ }
+ return;
}
- }
+ if (*lastWasTab == FALSE) {
+
+ char *tmp;
+ int len_found;
+ char matchBuf[BUFSIZ];
+ int find_type;
+ int recalc_pos;
+
+ *lastWasTab = TRUE; /* flop trigger */
+
+ /* Make a local copy of the string -- up
+ * to the position of the cursor */
+ tmp = strncpy(matchBuf, command_ps, cursor);
+ tmp[cursor] = 0;
+
+ find_type = find_match(matchBuf, &recalc_pos);
+
+ /* Free up any memory already allocated */
+ input_tab(0);
+
+#ifdef BB_FEATURE_SH_USERNAME_COMPLETION
+ /* If the word starts with `~' and there is no slash in the word,
+ * then try completing this word as a username. */
+
+ 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) {
+ char *tmp1;
+
+ beep();
+ if (!matches)
+ return; /* not found */
+ /* sort */
+ qsort(matches, num_matches, sizeof(char *), match_compare);
+
+ /* find minimal match */
+ tmp = xstrdup(matches[0]);
+ for (tmp1 = tmp; *tmp1; tmp1++)
+ for (len_found = 1; len_found < num_matches; len_found++)
+ if (matches[len_found][(tmp1 - tmp)] != *tmp1) {
+ *tmp1 = 0;
+ break;
+ }
+ if (*tmp == 0) { /* have unique */
+ free(tmp);
+ return;
+ }
+ } else { /* one match */
+ tmp = matches[0];
+ /* for next completion current found */
+ *lastWasTab = FALSE;
+ }
- return nr;
+ len_found = strlen(tmp);
+ /* have space to placed match? */
+ if ((len_found - strlen(matchBuf) + len) < BUFSIZ) {
+
+ /* before word for match */
+ command_ps[cursor - recalc_pos] = 0;
+ /* save tail line */
+ strcpy(matchBuf, command_ps + cursor);
+ /* add match */
+ strcat(command_ps, tmp);
+ /* add tail */
+ strcat(command_ps, matchBuf);
+ /* back to begin word for match */
+ input_backward(recalc_pos);
+ /* new pos */
+ recalc_pos = cursor + len_found;
+ /* new len */
+ len = strlen(command_ps);
+ /* write out the matched command */
+ input_end();
+ input_backward(cursor - recalc_pos);
+ }
+ if (tmp != matches[0])
+ free(tmp);
+ } 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, l;
+ int sav_cursor = cursor; /* change goto_new_line() */
+
+ /* Go to the next line */
+ goto_new_line();
+ for (i = 0, col = 0; i < num_matches; i++) {
+ l = strlen(matches[i]);
+ if (l < 14)
+ l = 14;
+ printf("%-14s ", matches[i]);
+ if ((l += 2) > 16)
+ while (l % 16) {
+ putchar(' ');
+ l++;
+ }
+ col += l;
+ col -= (col / cmdedit_termw) * cmdedit_termw;
+ if (col > 60 && matches[i + 1] != NULL) {
+ putchar('\n');
+ col = 0;
+ }
+ }
+ /* Go to the next line and rewrite */
+ putchar('\n');
+ redraw(0, len - sav_cursor);
+ }
+ }
}
+#endif /* BB_FEATURE_SH_TAB_COMPLETION */
-extern void cmdedit_init(void)
+static void get_previous_history(struct history **hp, struct history *p)
{
- atexit(cmdedit_reset_term);
- signal(SIGINT, gotaSignal);
- signal(SIGQUIT, gotaSignal);
- signal(SIGTERM, gotaSignal);
+ if ((*hp)->s)
+ free((*hp)->s);
+ (*hp)->s = xstrdup(command_ps);
+ *hp = p;
}
-#endif /* BB_FEATURE_SH_COMMAND_EDITING */
+
+static inline void get_next_history(struct history **hp)
+{
+ get_previous_history(hp, (*hp)->n);
+}
+
+enum {
+ ESC = 27,
+ DEL = 127,
+};
+
+
+/*
+ * 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.
+ *
+ */
+extern void cmdedit_read_input(char *prompt, char command[BUFSIZ])
+{
+
+ int inputFd = fileno(stdin);
+
+ int break_out = 0;
+ int lastWasTab = FALSE;
+ char c = 0;
+ struct history *hp = his_end;
+
+ /* prepare before init handlers */
+ cmdedit_y = 0; /* quasireal y, not true work if line > xt*yt */
+ len = 0;
+ command_ps = command;
+
+ if (new_settings.c_cc[VMIN] == 0) { /* first call */
+
+ 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 */
+ }
+
+ command[0] = 0;
+
+ setTermSettings(inputFd, (void *) &new_settings);
+ handlers_sets |= SET_RESET_TERM;
+
+ /* Print out the command prompt */
+ parse_prompt(prompt);
+ /* Now initialize things */
+ cmdedit_init();
+
+ while (1) {
+
+ fflush(stdout); /* buffered out to fast */
+
+ if (read(inputFd, &c, 1) < 1)
+ return;
+
+ switch (c) {
+ case '\n':
+ case '\r':
+ /* Enter */
+ goto_new_line();
+ break_out = 1;
+ break;
+ case 1:
+ /* Control-a -- Beginning of line */
+ input_backward(cursor);
+ break;
+ case 2:
+ /* Control-b -- Move back one character */
+ input_backward(1);
+ 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();
+ command[0] = 0;
+
+ 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);
+ goto rewrite_line;
+ } else {
+ beep();
+ }
+ break;
+ case 16:
+ /* Control-p -- Get previous command from history */
+ if (hp && hp->p) {
+ get_previous_history(&hp, hp->p);
+ goto rewrite_line;
+ } else {
+ beep();
+ }
+ break;
+ case 21:
+ /* Control-U -- Clear line before cursor */
+ if (cursor) {
+ strcpy(command, command + cursor);
+ redraw(cmdedit_y, len -= cursor);
+ }
+ break;
+
+ case ESC:{
+ /* escape sequence follows */
+ if (read(inputFd, &c, 1) < 1)
+ return;
+ /* different vt100 emulations */
+ if (c == '[' || c == 'O') {
+ if (read(inputFd, &c, 1) < 1)
+ return;
+ }
+ switch (c) {
+#ifdef BB_FEATURE_SH_TAB_COMPLETION
+ case '\t': /* Alt-Tab */
+
+ input_tab(&lastWasTab);
+ break;
+#endif
+ case 'A':
+ /* Up Arrow -- Get previous command from history */
+ if (hp && hp->p) {
+ get_previous_history(&hp, hp->p);
+ 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);
+ goto rewrite_line;
+ } else {
+ beep();
+ }
+ break;
+
+ /* Rewrite the line with the selected history item */
+ rewrite_line:
+ /* change command */
+ len = strlen(strcpy(command, hp->s));
+ /* redraw and go to end line */
+ redraw(cmdedit_y, 0);
+ break;
+ case 'C':
+ /* Right Arrow -- Move forward one character */
+ input_forward();
+ break;
+ case 'D':
+ /* Left Arrow -- Move back one character */
+ input_backward(1);
+ break;
+ case '3':
+ /* Delete */
+ input_delete();
+ break;
+ case '1':
+ case 'H':
+ /* Home (Ctrl-A) */
+ input_backward(cursor);
+ break;
+ case '4':
+ case 'F':
+ /* End (Ctrl-E) */
+ input_end();
+ break;
+ default:
+ if (!(c >= '1' && c <= '9'))
+ c = 0;
+ beep();
+ }
+ if (c >= '1' && c <= '9')
+ do
+ if (read(inputFd, &c, 1) < 1)
+ return;
+ while (c != '~');
+ break;
+ }
+
+ default: /* If it's regular input, do the normal thing */
+#ifdef BB_FEATURE_NONPRINTABLE_INVERSE_PUT
+ /* Control-V -- Add non-printable symbol */
+ if (c == 22) {
+ if (read(inputFd, &c, 1) < 1)
+ return;
+ if (c == 0) {
+ beep();
+ break;
+ }
+ } else
+#endif
+ 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;
+ *(command + cursor + 1) = 0;
+ cmdedit_set_out_char(0);
+ } else { /* Insert otherwise */
+ int sc = cursor;
+
+ memmove(command + sc + 1, command + sc, len - sc);
+ *(command + sc) = c;
+ sc++;
+ /* rewrite from cursor */
+ input_end();
+ /* to prev x pos + 1 */
+ input_backward(cursor - sc);
+ }
+
+ break;
+ }
+ if (break_out) /* Enter is the command terminator, no more input. */
+ break;
+
+ if (c != '\t')
+ lastWasTab = FALSE;
+ }
+
+ setTermSettings(inputFd, (void *) &initial_settings);
+ handlers_sets &= ~SET_RESET_TERM;
+
+ /* Handle command history log */
+ if (len) { /* no put empty line */
+
+ struct history *h = his_end;
+ char *ss;
+
+ ss = xstrdup(command); /* duplicate */
+
+ if (h == 0) {
+ /* 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++;
+ }
+ }
+#if defined(BB_FEATURE_BASH_STYLE_PROMT)
+ num_ok_lines++;
+#endif
+ }
+ command[len++] = '\n'; /* set '\n' */
+ command[len] = 0;
+#if defined(BB_FEATURE_CLEAN_UP) && defined(BB_FEATURE_SH_TAB_COMPLETION)
+ input_tab(0); /* strong free */
+#endif
+#if defined(BB_FEATURE_BASH_STYLE_PROMT)
+ free(cmdedit_prompt);
+#endif
+ return;
+}
+
+
+/* Undo the effects of cmdedit_init(). */
+extern void cmdedit_terminate(void)
+{
+ 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 */
+
+
+#ifdef TEST
+
+unsigned int shell_context;
+
+int main(int argc, char **argv)
+{
+ char buff[BUFSIZ];
+ char *prompt =
+#if defined(BB_FEATURE_BASH_STYLE_PROMT)
+ "\\[\\033[32;1m\\]\\u@\\[\\033[33;1m\\]\\h:\
+\\[\\033[34;1m\\]\\w\\[\\033[35;1m\\] \
+\\!\\[\\033[36;1m\\]\\$ \\[\\033[0m\\]";
+#else
+ "% ";
+#endif
+
+ shell_context = 1;
+ do {
+ cmdedit_read_input(prompt, buff);
+ printf("*** cmdedit_read_input() returned line =%s=\n", buff);
+ } while (shell_context);
+ printf("*** cmdedit_read_input() detect ^C\n");
+ return 0;
+}
+
+#endif /* TEST */
projects / oweals / busybox.git / blobdiff