+/* 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.
#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"
-
-#define 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 */
#define ESC 27
#define DEL 127
+#define member(c, s) ((c) ? ((char *)strchr ((s), (c)) != (char *)NULL) : 0)
+#define whitespace(c) (((c) == ' ') || ((c) == '\t'))
static struct history *his_front = NULL; /* First element in command line list */
static struct history *his_end = NULL; /* Last element in command line list */
-static struct termio old_term, new_term; /* Current termio and the previous termio before starting ash */
+/* ED: sparc termios is broken: revert back to old termio handling. */
+#ifdef BB_FEATURE_USE_TERMIOS
+
+#if #cpu(sparc)
+# include <termio.h>
+# define termios termio
+# define setTermSettings(fd,argp) ioctl(fd,TCSETAF,argp)
+# define getTermSettings(fd,argp) ioctl(fd,TCGETA,argp)
+#else
+# include <termios.h>
+# define setTermSettings(fd,argp) tcsetattr(fd,TCSANOW,argp)
+# define getTermSettings(fd,argp) tcgetattr(fd, argp);
+#endif
+
+/* Current termio and the previous termio before starting sh */
+struct termios initial_settings, new_settings;
+
+
+#ifndef _POSIX_VDISABLE
+#define _POSIX_VDISABLE '\0'
+#endif
+
+#endif
+
+
+
+static int cmdedit_termw = 80; /* actual terminal width */
+static int cmdedit_scroll = 27; /* width of EOL scrolling region */
static int history_counter = 0; /* Number of commands in history list */
-static int reset_term = 0; /* Set to true if the terminal needs to be reset upon exit */
-char *parsenextc; /* copy of parsefile->nextc */
+static int 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 *p;
- struct history *n;
+ char *s;
+ struct history *p;
+ struct history *n;
};
+#define xwrite write
-/* Version of write which resumes after a signal is caught. */
-int xwrite(int fd, char *buf, int nbytes)
+/*
+ * TODO: Someday we want to implement 'horizontal scrolling' of the
+ * command-line when the user has typed more than the current width. This
+ * would allow the user to see a 'window' of what he has typed.
+ */
+void
+cmdedit_setwidth(int w)
{
- int ntry;
- int i;
- int n;
-
- n = nbytes;
- ntry = 0;
- for (;;) {
- i = write(fd, buf, n);
- if (i > 0) {
- if ((n -= i) <= 0)
- return nbytes;
- buf += i;
- ntry = 0;
- } else if (i == 0) {
- if (++ntry > 10)
- return nbytes - n;
- } else if (errno != EINTR) {
- return -1;
+ if (w > 20) {
+ cmdedit_termw = w;
+ cmdedit_scroll = w / 3;
+ } else {
+ errorMsg("\n*** Error: minimum screen width is 21\n");
}
- }
-}
-
-
-/* Version of ioctl that retries after a signal is caught. */
-int xioctl(int fd, unsigned long request, char *arg)
-{
- int i;
- while ((i = ioctl(fd, request, arg)) == -1 && errno == EINTR);
- return i;
}
void cmdedit_reset_term(void)
{
- if (reset_term)
- xioctl(fileno(stdin), TCSETA, (void *) &old_term);
+ if (reset_term)
+ /* sparc and other have broken termios support: use old termio handling. */
+ setTermSettings(fileno(stdin), (void*) &initial_settings);
+#ifdef BB_FEATURE_CLEAN_UP
+ if (his_front) {
+ struct history *n;
+ //while(his_front!=his_end) {
+ while(his_front!=his_end) {
+ n = his_front->n;
+ free(his_front->s);
+ free(his_front);
+ his_front=n;
+ }
+ }
+#endif
}
-void gotaSignal(int sig)
+void clean_up_and_die(int sig)
{
- cmdedit_reset_term();
- fprintf(stdout, "\n");
- exit(TRUE);
+ cmdedit_reset_term();
+ fprintf(stdout, "\n");
+ if (sig!=SIGINT)
+ exit(TRUE);
}
+/* Go to HOME position */
void input_home(int outputFd, int *cursor)
-{ /* Command line input routines */
- while (*cursor > 0) {
- xwrite(outputFd, "\b", 1);
- --*cursor;
- }
+{
+ 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;
+ }
+}
-void input_delete(int outputFd, int cursor)
+/* Delete the char in back of the cursor */
+void input_backspace(char* command, int outputFd, int *cursor, int *len)
{
- int j = 0;
+ 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);
- }
+/* Debug crap */
+//fprintf(stderr, "\nerik: len=%d, cursor=%d, strlen(command)='%d'\n", *len, *cursor, strlen(command));
+//xwrite(outputFd, command, *len);
+//*cursor = *len;
- xwrite(outputFd, " \b", 2);
- while (j-- > cursor)
- xwrite(outputFd, "\b", 1);
-}
+ 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);
+ }
-void input_end(int outputFd, int *cursor, int len)
-{
- while (*cursor < len) {
- xwrite(outputFd, "\033[C", 3);
- ++*cursor;
- }
-}
+ xwrite(outputFd, " \b", 2);
+ while (j-- > *cursor)
+ xwrite(outputFd, "\b", 1);
-void input_backspace(int outputFd, int *cursor, int *len)
+ --*len;
+ }
+}
+
+/* Delete the char in front of the cursor */
+void input_delete(char* command, int outputFd, int cursor, int *len)
{
- int j = 0;
-
- if (*cursor > 0) {
- xwrite(outputFd, "\b \b", 3);
- --*cursor;
- memmove(parsenextc + *cursor, parsenextc + *cursor + 1,
- BUFSIZ - *cursor + 1);
-
- for (j = *cursor; j < (BUFSIZ - 1); j++) {
- if (!*(parsenextc + j))
- break;
- else
- xwrite(outputFd, (parsenextc + j), 1);
+ int j = 0;
+
+ if (cursor == *len)
+ return;
+
+ memmove(command + cursor, command + cursor + 1,
+ BUFSIZ - cursor - 1);
+ for (j = cursor; j < (BUFSIZ - 1); j++) {
+ if (!*(command + j))
+ break;
+ else
+ xwrite(outputFd, (command + j), 1);
}
xwrite(outputFd, " \b", 2);
- while (j-- > *cursor)
- xwrite(outputFd, "\b", 1);
-
+ while (j-- > cursor)
+ xwrite(outputFd, "\b", 1);
--*len;
- }
}
-extern int cmdedit_read_input(int inputFd, int outputFd,
- char command[BUFSIZ])
+/* Move forward one charactor */
+void input_forward(int outputFd, int *cursor, int len)
{
+ if (*cursor < len) {
+ xwrite(outputFd, "\033[C", 3);
+ ++*cursor;
+ }
+}
- 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);
- }
-
- 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;
+/* Move back one charactor */
+void input_backward(int outputFd, int *cursor)
+{
+ if (*cursor > 0) {
+ xwrite(outputFd, "\033[D", 3);
+ --*cursor;
+ }
+}
- 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);
+#ifdef BB_FEATURE_SH_TAB_COMPLETION
+char** username_tab_completion(char* command, int *num_matches)
+{
+ char **matches = (char **) NULL;
+ *num_matches=0;
+ fprintf(stderr, "\nin username_tab_completion\n");
+ return (matches);
+}
- 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;
- }
- 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;
+#include <dirent.h>
+char** exe_n_cwd_tab_completion(char* command, int *num_matches)
+{
+ char *dirName;
+ char **matches = (char **) NULL;
+ DIR *dir;
+ struct dirent *next;
+
+ matches = malloc( sizeof(char*)*50);
+
+ /* Stick a wildcard onto the command, for later use */
+ strcat( command, "*");
+
+ /* Now wall the current directory */
+ dirName = get_current_dir_name();
+ dir = opendir(dirName);
+ 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)) {
+ continue;
+ }
+ /* 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));
}
- }
- 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++;
+ return (matches);
+}
- 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);
+void input_tab(char* command, char* prompt, int outputFd, int *cursor, int *len)
+{
+ /* Do TAB completion */
+ static int num_matches=0;
+ static char **matches = (char **) NULL;
+ int pos = cursor;
+
+
+ if (lastWasTab == FALSE) {
+ char *tmp, *tmp1, *matchBuf;
+
+ /* For now, we will not bother with trying to distinguish
+ * whether the cursor is in/at a command extression -- we
+ * will always try all possible matches. If you don't like
+ * that then feel free to fix it.
+ */
+
+ /* Make a local copy of the string -- up
+ * to the position of the cursor */
+ matchBuf = (char *) calloc(BUFSIZ, sizeof(char));
+ strncpy(matchBuf, command, cursor);
+ tmp=matchBuf;
+
+ /* skip past any command seperator tokens */
+ while (*tmp && (tmp1=strpbrk(tmp, ";|&{(`")) != NULL) {
+ tmp=++tmp1;
+ /* skip any leading white space */
+ while (*tmp && isspace(*tmp))
+ ++tmp;
+ }
- *(parsenextc + cursor) = c;
+ /* skip any leading white space */
+ while (*tmp && isspace(*tmp))
+ ++tmp;
- for (j = cursor; j < len; j++)
- xwrite(outputFd, parsenextc + j, 1);
- for (; j > cursor; j--)
- xwrite(outputFd, "\033[D", 3);
- }
+ /* Free up any memory already allocated */
+ if (matches) {
+ free(matches);
+ matches = (char **) NULL;
+ }
- cursor++;
- xwrite(outputFd, &c, 1);
- break;
+ /* If the word starts with `~' and there is no slash in the word,
+ * then try completing this word as a username. */
+
+ /* FIXME -- this check is broken! */
+ if (*tmp == '~' && !strchr(tmp, '/'))
+ matches = username_tab_completion(tmp, &num_matches);
+
+ /* Try to match any executable in our path and everything
+ * in the current working directory that matches. */
+ if (!matches)
+ matches = exe_n_cwd_tab_completion(tmp, &num_matches);
+
+ /* Don't leak memory */
+ free( matchBuf);
+
+ /* Did we find exactly one match? */
+ if (matches && num_matches==1) {
+ /* write out the matched command */
+ strncpy(command+pos, matches[0]+pos, strlen(matches[0])-pos);
+ len=strlen(command);
+ cursor=len;
+ xwrite(outputFd, matches[0]+pos, strlen(matches[0])-pos);
+ break;
+ }
+ } else {
+ /* Ok -- the last char was a TAB. Since they
+ * just hit TAB again, print a list of all the
+ * available choices... */
+ if ( matches && num_matches>0 ) {
+ int i, col;
+
+ /* Go to the next line */
+ xwrite(outputFd, "\n", 1);
+ /* Print the list of matches */
+ for (i=0,col=0; i<num_matches; i++) {
+ char foo[17];
+ sprintf(foo, "%-14s ", matches[i]);
+ col += xwrite(outputFd, foo, strlen(foo));
+ if (col > 60 && matches[i+1] != NULL) {
+ xwrite(outputFd, "\n", 1);
+ col = 0;
+ }
+ }
+ /* Go to the next line */
+ xwrite(outputFd, "\n", 1);
+ /* Rewrite the prompt */
+ xwrite(outputFd, prompt, strlen(prompt));
+ /* Rewrite the command */
+ xwrite(outputFd, command, len);
+ /* Put the cursor back to where it used to be */
+ for (cursor=len; cursor > pos; cursor--)
+ xwrite(outputFd, "\b", 1);
+ }
}
+}
+#endif
- if (break_out) /* Enter is the command terminator, no more input. */
- break;
- }
-
- nr = len + 1;
- xioctl(inputFd, TCSETA, (void *) &old_term);
- reset_term = 0;
+void get_previous_history(struct history **hp, char* command)
+{
+ if ((*hp)->s)
+ free((*hp)->s);
+ (*hp)->s = strdup(command);
+ *hp = (*hp)->p;
+}
+void get_next_history(struct history **hp, char* command)
+{
+ if ((*hp)->s)
+ free((*hp)->s);
+ (*hp)->s = strdup(command);
+ *hp = (*hp)->n;
+}
- if (*(parsenextc)) { /* Handle command history log */
+/*
+ * 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])
+{
- struct history *h = his_end;
+ 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) {
+
+ getTermSettings(inputFd, (void*) &initial_settings);
+ memcpy(&new_settings, &initial_settings, sizeof(struct termios));
+ new_settings.c_cc[VMIN] = 1;
+ new_settings.c_cc[VTIME] = 0;
+ new_settings.c_cc[VINTR] = _POSIX_VDISABLE; /* Turn off CTRL-C, so we can trap it */
+ new_settings.c_lflag &= ~ICANON; /* unbuffered input */
+ new_settings.c_lflag &= ~(ECHO|ECHOCTL|ECHONL); /* Turn off echoing */
+ reset_term = 1;
+ }
+ setTermSettings(inputFd, (void*) &new_settings);
- 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);
+ memset(command, 0, BUFSIZ);
- 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));
+ if ((ret = read(inputFd, &c, 1)) < 1)
+ return;
+ //fprintf(stderr, "got a '%c' (%d)\n", c, c);
- h->n->p = h;
- h->n->n = NULL;
- h->n->s = NULL;
- h->s = strdup(parsenextc);
- his_end = h->n;
+ switch (c) {
+ case '\n':
+ case '\r':
+ /* Enter */
+ *(command + len++ + 1) = c;
+ xwrite(outputFd, &c, 1);
+ break_out = 1;
+ break;
+ case 1:
+ /* Control-a -- Beginning of line */
+ input_home(outputFd, &cursor);
+ case 2:
+ /* Control-b -- Move back one character */
+ input_backward(outputFd, &cursor);
+ break;
+ case 3:
+ /* Control-c -- leave the current line,
+ * and start over on the next line */
+
+ /* Go to the next line */
+ xwrite(outputFd, "\n", 1);
+
+ /* Rewrite the prompt */
+ xwrite(outputFd, prompt, strlen(prompt));
+
+ /* Reset the command string */
+ memset(command, 0, BUFSIZ);
+ len = cursor = 0;
+
+ break;
+ case 4:
+ /* Control-d -- Delete one character, or exit
+ * if the len=0 and no chars to delete */
+ if (len == 0) {
+ xwrite(outputFd, "exit", 4);
+ clean_up_and_die(0);
+ } else {
+ input_delete(command, outputFd, cursor, &len);
+ }
+ break;
+ case 5:
+ /* Control-e -- End of line */
+ input_end(outputFd, &cursor, len);
+ break;
+ case 6:
+ /* Control-f -- Move forward one character */
+ input_forward(outputFd, &cursor, len);
+ break;
+ case '\b':
+ case DEL:
+ /* Control-h and DEL */
+ input_backspace(command, outputFd, &cursor, &len);
+ break;
+ case '\t':
+#ifdef BB_FEATURE_SH_TAB_COMPLETION
+ input_tab(command, prompt, outputFd, &cursor, &len);
+#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 {
+ xwrite(outputFd, "\007", 1);
+ }
+ break;
+ case 16:
+ /* Control-p -- Get previous command from history */
+ if (hp && hp->p) {
+ get_previous_history(&hp, command);
+ goto rewrite_line;
+ } else {
+ xwrite(outputFd, "\007", 1);
+ }
+ break;
+ case ESC:{
+ /* escape sequence follows */
+ if ((ret = read(inputFd, &c, 1)) < 1)
+ return;
+
+ 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 {
+ xwrite(outputFd, "\007", 1);
+ }
+ 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 {
+ xwrite(outputFd, "\007", 1);
+ }
+ 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);
+
+ /* write new command */
+ strcpy(command, hp->s);
+ len = strlen(hp->s);
+ xwrite(outputFd, command, len);
+ cursor = len;
+ break;
+ case 'C':
+ /* Right Arrow -- Move forward one character */
+ input_forward(outputFd, &cursor, len);
+ break;
+ case 'D':
+ /* Left Arrow -- Move back one character */
+ input_backward(outputFd, &cursor);
+ break;
+ case '3':
+ /* Delete */
+ input_delete(command, 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;
+ default:
+ xwrite(outputFd, "\007", 1);
+ }
+ 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(outputFd, &cursor);
+ break;
+ case 'F':
+ /* End (xterm) */
+ input_end(outputFd, &cursor, len);
+ break;
+ default:
+ xwrite(outputFd, "\007", 1);
+ }
+ }
+ 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;
+ } 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);
+ }
- if (history_counter >= MAX_HISTORY) { /* After max history, remove the last known command */
+ cursor++;
+ xwrite(outputFd, &c, 1);
+ 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++;
- }
+ nr = len + 1;
+ setTermSettings(inputFd, (void *) &initial_settings);
+ reset_term = 0;
+
+
+ /* Handle command history log */
+ if (*(command)) {
+
+ struct history *h = his_end;
+
+ if (!h) {
+ /* No previous history -- this memory is never freed */
+ h = his_front = malloc(sizeof(struct history));
+ h->n = malloc(sizeof(struct history));
+
+ h->p = NULL;
+ h->s = strdup(command);
+ h->n->p = h;
+ h->n->n = NULL;
+ h->n->s = NULL;
+ his_end = h->n;
+ history_counter++;
+ } else {
+ /* Add a new history command -- this memory is never freed */
+ h->n = malloc(sizeof(struct history));
+
+ h->n->p = h;
+ h->n->n = NULL;
+ h->n->s = NULL;
+ h->s = strdup(command);
+ 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)
{
- atexit(cmdedit_reset_term);
- signal(SIGINT, gotaSignal);
- signal(SIGQUIT, gotaSignal);
- signal(SIGTERM, gotaSignal);
+ if(exithandler_set == 0) {
+ atexit(cmdedit_reset_term); /* be sure to do this only once */
+ exithandler_set = 1;
+ }
+ signal(SIGKILL, clean_up_and_die);
+ signal(SIGINT, clean_up_and_die);
+ signal(SIGQUIT, clean_up_and_die);
+ signal(SIGTERM, clean_up_and_die);
+}
+
+/*
+** Undo the effects of cmdedit_init() as good as we can:
+** I am not aware of a way to revoke an atexit() handler,
+** but, fortunately, our particular handler can be made
+** a no-op by setting reset_term = 0.
+*/
+extern void cmdedit_terminate(void)
+{
+ cmdedit_reset_term();
+ reset_term = 0;
+ signal(SIGKILL, SIG_DFL);
+ signal(SIGINT, SIG_DFL);
+ signal(SIGQUIT, SIG_DFL);
+ signal(SIGTERM, SIG_DFL);
}
-#endif /* BB_FEATURE_SH_COMMAND_EDITING */
+
+
+
+#endif /* BB_FEATURE_SH_COMMAND_EDITING */
projects / oweals / busybox.git / blobdiff