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authorDenis Vlasenko2007-01-22 09:03:42 +0000
committerDenis Vlasenko2007-01-22 09:03:42 +0000
commit95fef7071e9aaad938b0e5f8859470b89383fd26 (patch)
treee0c7fdfeb8daee0ffb3b77d1d6c69e10afd7b583 /libbb
parent38f6319421c1892ea5c9c0484cec0e190bdc5c69 (diff)
downloadbusybox-95fef7071e9aaad938b0e5f8859470b89383fd26.zip
busybox-95fef7071e9aaad938b0e5f8859470b89383fd26.tar.gz
move shell/cmdedit.c -> libbb/lineedit.c
Diffstat (limited to 'libbb')
-rw-r--r--libbb/lineedit.c1798
1 files changed, 1798 insertions, 0 deletions
diff --git a/libbb/lineedit.c b/libbb/lineedit.c
new file mode 100644
index 0000000..e62975d
--- /dev/null
+++ b/libbb/lineedit.c
@@ -0,0 +1,1798 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Termios command line History and Editing.
+ *
+ * Copyright (c) 1986-2003 may safely be consumed by a BSD or GPL license.
+ * Written by: Vladimir Oleynik <dzo@simtreas.ru>
+ *
+ * Used ideas:
+ * Adam Rogoyski <rogoyski@cs.utexas.edu>
+ * Dave Cinege <dcinege@psychosis.com>
+ * Jakub Jelinek (c) 1995
+ * Erik Andersen <andersen@codepoet.org> (Majorly adjusted for busybox)
+ *
+ * This code is 'as is' with no warranty.
+ */
+
+/*
+ Usage and known bugs:
+ Terminal key codes are not extensive, and more will probably
+ 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.
+
+ Small bugs (simple effect):
+ - not true viewing if terminal size (x*y symbols) less
+ size (prompt + editor's line + 2 symbols)
+ - not true viewing if length prompt less terminal width
+ */
+
+#include <sys/ioctl.h>
+#include "busybox.h"
+
+
+/* FIXME: obsolete CONFIG item? */
+#define ENABLE_FEATURE_NONPRINTABLE_INVERSE_PUT 0
+
+
+#ifdef TEST
+
+#define ENABLE_FEATURE_EDITING 0
+#define ENABLE_FEATURE_TAB_COMPLETION 0
+#define ENABLE_FEATURE_USERNAME_COMPLETION 0
+#define ENABLE_FEATURE_NONPRINTABLE_INVERSE_PUT 0
+#define ENABLE_FEATURE_CLEAN_UP 0
+
+#endif /* TEST */
+
+
+/* Entire file (except TESTing part) sits inside this #if */
+#if ENABLE_FEATURE_EDITING
+
+#if ENABLE_LOCALE_SUPPORT
+#define Isprint(c) isprint(c)
+#else
+#define Isprint(c) ((c) >= ' ' && (c) != ((unsigned char)'\233'))
+#endif
+
+#define ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR \
+(ENABLE_FEATURE_USERNAME_COMPLETION || ENABLE_FEATURE_EDITING_FANCY_PROMPT)
+
+
+static line_input_t *state;
+
+static struct termios initial_settings, new_settings;
+
+static volatile unsigned cmdedit_termw = 80; /* actual terminal width */
+
+static int cmdedit_x; /* real x terminal position */
+static int cmdedit_y; /* pseudoreal y terminal position */
+static int cmdedit_prmt_len; /* length of prompt (without colors etc) */
+
+static unsigned cursor;
+static unsigned command_len;
+static char *command_ps;
+static const char *cmdedit_prompt;
+
+#if ENABLE_FEATURE_EDITING_FANCY_PROMPT
+static char *hostname_buf;
+static int num_ok_lines = 1;
+#endif
+
+#if ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR
+static char *user_buf = "";
+static char *home_pwd_buf = "";
+#endif
+
+#if ENABLE_FEATURE_TAB_COMPLETION
+static int my_uid;
+static int my_gid;
+#endif
+
+/* Put 'command_ps[cursor]', cursor++.
+ * Advance cursor on screen. If we reached right margin, scroll text up
+ * and remove terminal margin effect by printing 'next_char' */
+static void cmdedit_set_out_char(int next_char)
+{
+ int c = (unsigned char)command_ps[cursor];
+
+ if (c == '\0') {
+ /* erase character after end of input string */
+ c = ' ';
+ }
+#if ENABLE_FEATURE_NONPRINTABLE_INVERSE_PUT
+ /* Display non-printable characters in reverse */
+ if (!Isprint(c)) {
+ if (c >= 128)
+ c -= 128;
+ if (c < ' ')
+ c += '@';
+ if (c == 127)
+ c = '?';
+ printf("\033[7m%c\033[0m", c);
+ } else
+#endif
+ {
+ if (initial_settings.c_lflag & ECHO)
+ putchar(c);
+ }
+ if (++cmdedit_x >= cmdedit_termw) {
+ /* terminal is scrolled down */
+ cmdedit_y++;
+ cmdedit_x = 0;
+ /* destroy "(auto)margin" */
+ putchar(next_char);
+ putchar('\b');
+ }
+// Huh? What if command_ps[cursor] == '\0' (we are at the end already?)
+ cursor++;
+}
+
+/* Move to end of line (by printing all chars till the end) */
+static void input_end(void)
+{
+ while (cursor < command_len)
+ cmdedit_set_out_char(' ');
+}
+
+/* Go to the next line */
+static void goto_new_line(void)
+{
+ input_end();
+ if (cmdedit_x)
+ putchar('\n');
+}
+
+
+static void out1str(const char *s)
+{
+ if (s)
+ fputs(s, stdout);
+}
+
+static void beep(void)
+{
+ putchar('\007');
+}
+
+/* Move back one character */
+/* (optimized for slow terminals) */
+static void input_backward(unsigned num)
+{
+ int count_y;
+
+ if (num > cursor)
+ num = cursor;
+ if (!num)
+ return;
+ cursor -= num;
+
+ if (cmdedit_x >= num) {
+ cmdedit_x -= num;
+ if (num <= 4) {
+ do putchar('\b'); while (--num);
+ return;
+ }
+ printf("\033[%uD", num);
+ return;
+ }
+
+ /* Need to go one or more lines up */
+ num -= cmdedit_x;
+ count_y = 1 + (num / cmdedit_termw);
+ cmdedit_y -= count_y;
+ cmdedit_x = cmdedit_termw * count_y - num;
+ /* go to 1st col; go up; go to correct column */
+ printf("\r" "\033[%dA" "\033[%dC", count_y, cmdedit_x);
+}
+
+static void put_prompt(void)
+{
+ out1str(cmdedit_prompt);
+ cmdedit_x = cmdedit_prmt_len;
+ cursor = 0;
+// Huh? what if cmdedit_prmt_len >= width?
+ cmdedit_y = 0; /* new quasireal y */
+}
+
+/* draw prompt, editor line, and clear tail */
+static void redraw(int y, int back_cursor)
+{
+ if (y > 0) /* up to start y */
+ printf("\033[%dA", y);
+ putchar('\r');
+ put_prompt();
+ input_end(); /* rewrite */
+ printf("\033[J"); /* erase after cursor */
+ input_backward(back_cursor);
+}
+
+#if ENABLE_FEATURE_EDITING_VI
+#define DELBUFSIZ 128
+static char *delbuf; /* a (malloced) place to store deleted characters */
+static char *delp;
+static char newdelflag; /* whether delbuf should be reused yet */
+#endif
+
+/* Delete the char in front of the cursor, optionally saving it
+ * for later putback */
+static void input_delete(int save)
+{
+ int j = cursor;
+
+ if (j == command_len)
+ return;
+
+#if ENABLE_FEATURE_EDITING_VI
+ if (save) {
+ if (newdelflag) {
+ if (!delbuf)
+ delbuf = malloc(DELBUFSIZ);
+ /* safe if malloc fails */
+ delp = delbuf;
+ newdelflag = 0;
+ }
+ if (delbuf && (delp - delbuf < DELBUFSIZ))
+ *delp++ = command_ps[j];
+ }
+#endif
+
+ strcpy(command_ps + j, command_ps + j + 1);
+ command_len--;
+ input_end(); /* rewrite new line */
+ cmdedit_set_out_char(' '); /* erase char */
+ input_backward(cursor - j); /* back to old pos cursor */
+}
+
+#if ENABLE_FEATURE_EDITING_VI
+static void put(void)
+{
+ int ocursor;
+ int j = delp - delbuf;
+
+ if (j == 0)
+ return;
+ ocursor = cursor;
+ /* open hole and then fill it */
+ memmove(command_ps + cursor + j, command_ps + cursor, command_len - cursor + 1);
+ strncpy(command_ps + cursor, delbuf, j);
+ command_len += j;
+ input_end(); /* rewrite new line */
+ input_backward(cursor - ocursor - j + 1); /* at end of new text */
+}
+#endif
+
+/* Delete the char in back of the cursor */
+static void input_backspace(void)
+{
+ if (cursor > 0) {
+ input_backward(1);
+ input_delete(0);
+ }
+}
+
+/* Move forward one character */
+static void input_forward(void)
+{
+ if (cursor < command_len)
+ cmdedit_set_out_char(command_ps[cursor + 1]);
+}
+
+
+#if ENABLE_FEATURE_TAB_COMPLETION
+
+static char **matches;
+static unsigned num_matches;
+
+static void free_tab_completion_data(void)
+{
+ if (matches) {
+ while (num_matches)
+ free(matches[--num_matches]);
+ free(matches);
+ matches = NULL;
+ }
+}
+
+static void add_match(char *matched)
+{
+ int nm = num_matches;
+ int nm1 = nm + 1;
+
+ matches = xrealloc(matches, nm1 * sizeof(char *));
+ matches[nm] = matched;
+ num_matches++;
+}
+
+#if ENABLE_FEATURE_USERNAME_COMPLETION
+static void username_tab_completion(char *ud, char *with_shash_flg)
+{
+ struct passwd *entry;
+ int userlen;
+
+ ud++; /* ~user/... to user/... */
+ userlen = strlen(ud);
+
+ if (with_shash_flg) { /* "~/..." or "~user/..." */
+ char *sav_ud = ud - 1;
+ char *home = 0;
+ char *temp;
+
+ 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 (home) {
+ if ((userlen + strlen(home) + 1) < BUFSIZ) {
+ char temp2[BUFSIZ]; /* argument size */
+
+ /* /home/user/... */
+ sprintf(temp2, "%s%s", home, ud);
+ strcpy(sav_ud, temp2);
+ }
+ }
+ } else {
+ /* "~[^/]*" */
+ setpwent();
+
+ while ((entry = getpwent()) != NULL) {
+ /* Null usernames should result in all users as possible completions. */
+ if ( /*!userlen || */ !strncmp(ud, entry->pw_name, userlen)) {
+ add_match(xasprintf("~%s/", entry->pw_name));
+ }
+ }
+
+ endpwent();
+ }
+}
+#endif /* FEATURE_COMMAND_USERNAME_COMPLETION */
+
+enum {
+ FIND_EXE_ONLY = 0,
+ FIND_DIR_ONLY = 1,
+ FIND_FILE_ONLY = 2,
+};
+
+static int path_parse(char ***p, int flags)
+{
+ int npth;
+ const char *pth;
+ char *tmp;
+ char **res;
+
+ /* if not setenv PATH variable, to search cur dir "." */
+ if (flags != FIND_EXE_ONLY)
+ return 1;
+
+ if (state->flags & WITH_PATH_LOOKUP)
+ pth = state->path_lookup;
+ else
+ pth = getenv("PATH");
+ /* PATH=<empty> or PATH=:<empty> */
+ if (!pth || !pth[0] || LONE_CHAR(pth, ':'))
+ return 1;
+
+ tmp = (char*)pth;
+ npth = 1; /* path component count */
+ while (1) {
+ tmp = strchr(tmp, ':');
+ if (!tmp)
+ break;
+ if (*++tmp == '\0')
+ break; /* :<empty> */
+ npth++;
+ }
+
+ res = xmalloc(npth * sizeof(char*));
+ res[0] = tmp = xstrdup(pth);
+ npth = 1;
+ while (1) {
+ tmp = strchr(tmp, ':');
+ if (!tmp)
+ break;
+ *tmp++ = '\0'; /* ':' -> '\0' */
+ if (*tmp == '\0')
+ break; /* :<empty> */
+ res[npth++] = tmp;
+ }
+ *p = res;
+ return npth;
+}
+
+static void exe_n_cwd_tab_completion(char *command, int type)
+{
+ DIR *dir;
+ struct dirent *next;
+ char dirbuf[BUFSIZ];
+ struct stat st;
+ char *path1[1];
+ char **paths = path1;
+ int npaths;
+ int i;
+ char *found;
+ char *pfind = strrchr(command, '/');
+
+ npaths = 1;
+ path1[0] = ".";
+
+ if (pfind == NULL) {
+ /* no dir, if flags==EXE_ONLY - get paths, else "." */
+ npaths = path_parse(&paths, type);
+ pfind = command;
+ } else {
+ /* dirbuf = ".../.../.../" */
+ safe_strncpy(dirbuf, command, (pfind - command) + 2);
+#if ENABLE_FEATURE_USERNAME_COMPLETION
+ if (dirbuf[0] == '~') /* ~/... or ~user/... */
+ username_tab_completion(dirbuf, dirbuf);
+#endif
+ paths[0] = dirbuf;
+ /* point to 'l' in "..../last_component" */
+ pfind++;
+ }
+
+ for (i = 0; i < npaths; i++) {
+ dir = opendir(paths[i]);
+ if (!dir) /* Don't print an error */
+ continue;
+
+ while ((next = readdir(dir)) != NULL) {
+ int len1;
+ 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 (NOT_LONE_CHAR(paths[i], '/') || str_found[1])
+ continue;
+ str_found = ""; /* only "/" */
+ }
+ found = concat_path_file(paths[i], str_found);
+ /* hmm, remover in progress? */
+ if (stat(found, &st) < 0)
+ goto cont;
+ /* find with dirs? */
+ if (paths[i] != dirbuf)
+ strcpy(found, next->d_name); /* only name */
+
+ len1 = strlen(found);
+ found = xrealloc(found, len1 + 2);
+ found[len1] = '\0';
+ found[len1+1] = '\0';
+
+ if (S_ISDIR(st.st_mode)) {
+ /* name is directory */
+ if (found[len1-1] != '/') {
+ found[len1] = '/';
+ }
+ } else {
+ /* not put found file if search only dirs for cd */
+ if (type == FIND_DIR_ONLY)
+ goto cont;
+ }
+ /* Add it to the list */
+ add_match(found);
+ continue;
+ cont:
+ free(found);
+ }
+ closedir(dir);
+ }
+ if (paths != path1) {
+ free(paths[0]); /* allocated memory only in first member */
+ free(paths);
+ }
+}
+
+#define QUOT (UCHAR_MAX+1)
+
+#define collapse_pos(is, in) { \
+ memmove(int_buf+(is), int_buf+(in), (BUFSIZ+1-(is)-(in))*sizeof(int)); \
+ memmove(pos_buf+(is), pos_buf+(in), (BUFSIZ+1-(is)-(in))*sizeof(int)); }
+
+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] = (unsigned char)matchBuf[i];
+ if (int_buf[i] == 0) {
+ pos_buf[i] = -1; /* indicator end line */
+ break;
+ }
+ pos_buf[i] = i;
+ }
+
+ /* 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++;
+#if ENABLE_FEATURE_NONPRINTABLE_INVERSE_PUT
+ if (matchBuf[i] == '\t') /* algorithm equivalent */
+ int_buf[j] = ' ' | QUOT;
+#endif
+ }
+#if ENABLE_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;
+ }
+
+ /* skip commands with arguments if line has 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 */
+ }
+
+ /* 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 */
+ }
+
+ /* 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
+ && matchBuf[pos_buf[0]]=='c'
+ && matchBuf[pos_buf[1]]=='d'
+ ) {
+ command_mode = FIND_DIR_ONLY;
+ } else {
+ command_mode = FIND_FILE_ONLY;
+ break;
+ }
+ }
+ for (i = 0; int_buf[i]; i++)
+ /* "strlen" */;
+ /* 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++)
+ /*skip*/;
+ /* collapse quote or unquote // or /~ */
+ while ((int_buf[i] & ~QUOT) == '/'
+ && ((int_buf[i+1] & ~QUOT) == '/' || (int_buf[i+1] & ~QUOT) == '~')
+ ) {
+ i++;
+ }
+
+ /* set only match and destroy quotes */
+ j = 0;
+ for (c = 0; pos_buf[i] >= 0; i++) {
+ matchBuf[c++] = matchBuf[pos_buf[i]];
+ j = pos_buf[i] + 1;
+ }
+ matchBuf[c] = 0;
+ /* old lenght matchBuf with quotes symbols */
+ *len_with_quotes = j ? j - pos_buf[0] : 0;
+
+ return command_mode;
+}
+
+/*
+ * display by column (original idea from ls applet,
+ * very optimized by me :)
+ */
+static void showfiles(void)
+{
+ int ncols, row;
+ int column_width = 0;
+ int nfiles = num_matches;
+ int nrows = nfiles;
+ int l;
+
+ /* find the longest file name- use that as the column width */
+ for (row = 0; row < nrows; row++) {
+ l = strlen(matches[row]);
+ if (column_width < l)
+ column_width = l;
+ }
+ column_width += 2; /* min space for columns */
+ ncols = cmdedit_termw / column_width;
+
+ if (ncols > 1) {
+ nrows /= ncols;
+ if (nfiles % ncols)
+ nrows++; /* round up fractionals */
+ } else {
+ ncols = 1;
+ }
+ for (row = 0; row < nrows; row++) {
+ int n = row;
+ int nc;
+
+ for (nc = 1; nc < ncols && n+nrows < nfiles; n += nrows, nc++) {
+ printf("%s%-*s", matches[n],
+ (int)(column_width - strlen(matches[n])), "");
+ }
+ printf("%s\n", matches[n]);
+ }
+}
+
+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 int match_compare(const void *a, const void *b)
+{
+ return strcmp(*(char**)a, *(char**)b);
+}
+
+/* Do TAB completion */
+static void input_tab(int *lastWasTab)
+{
+ if (!(state->flags & TAB_COMPLETION))
+ return;
+
+ if (!*lastWasTab) {
+ char *tmp, *tmp1;
+ 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 */
+ free_tab_completion_data();
+
+#if ENABLE_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 (state->flags & USERNAME_COMPLETION)
+ if (matchBuf[0] == '~' && strchr(matchBuf, '/') == 0)
+ username_tab_completion(matchBuf, NULL);
+#endif
+ /* Try to match any executable in our path and everything
+ * in the current working directory */
+ if (!matches)
+ exe_n_cwd_tab_completion(matchBuf, find_type);
+ /* Sort, then remove any duplicates found */
+ if (matches) {
+ int i, n = 0;
+ qsort(matches, num_matches, sizeof(char*), match_compare);
+ for (i = 0; i < num_matches - 1; ++i) {
+ if (matches[i] && matches[i+1]) { /* paranoia */
+ if (strcmp(matches[i], matches[i+1]) == 0) {
+ free(matches[i]);
+ matches[i] = NULL; /* paranoia */
+ } else {
+ matches[n++] = matches[i];
+ }
+ }
+ }
+ matches[n] = matches[i];
+ num_matches = n + 1;
+ }
+ /* Did we find exactly one match? */
+ if (!matches || num_matches > 1) {
+ beep();
+ if (!matches)
+ return; /* not found */
+ /* find minimal match */
+ tmp1 = xstrdup(matches[0]);
+ for (tmp = tmp1; *tmp; tmp++)
+ for (len_found = 1; len_found < num_matches; len_found++)
+ if (matches[len_found][(tmp - tmp1)] != *tmp) {
+ *tmp = '\0';
+ break;
+ }
+ if (*tmp1 == '\0') { /* have unique */
+ free(tmp1);
+ return;
+ }
+ tmp = add_quote_for_spec_chars(tmp1);
+ free(tmp1);
+ } else { /* one match */
+ tmp = add_quote_for_spec_chars(matches[0]);
+ /* for next completion current found */
+ *lastWasTab = FALSE;
+
+ len_found = strlen(tmp);
+ if (tmp[len_found-1] != '/') {
+ tmp[len_found] = ' ';
+ tmp[len_found+1] = '\0';
+ }
+ }
+ len_found = strlen(tmp);
+ /* have space to placed match? */
+ if ((len_found - strlen(matchBuf) + command_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 */
+ command_len = strlen(command_ps);
+ /* write out the matched command */
+ redraw(cmdedit_y, command_len - recalc_pos);
+ }
+ 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 sav_cursor = cursor; /* change goto_new_line() */
+
+ /* Go to the next line */
+ goto_new_line();
+ showfiles();
+ redraw(0, command_len - sav_cursor);
+ }
+ }
+}
+
+#else
+#define input_tab(a) ((void)0)
+#endif /* FEATURE_COMMAND_TAB_COMPLETION */
+
+
+#if MAX_HISTORY > 0
+
+/* state->flags is already checked to be nonzero */
+static void get_previous_history(void)
+{
+ if (command_ps[0] != '\0' || state->history[state->cur_history] == NULL) {
+ free(state->history[state->cur_history]);
+ state->history[state->cur_history] = xstrdup(command_ps);
+ }
+ state->cur_history--;
+}
+
+static int get_next_history(void)
+{
+ if (state->flags & DO_HISTORY) {
+ int ch = state->cur_history;
+ if (ch < state->cnt_history) {
+ get_previous_history(); /* save the current history line */
+ state->cur_history = ch + 1;
+ return state->cur_history;
+ }
+ }
+ beep();
+ return 0;
+}
+
+#if ENABLE_FEATURE_EDITING_SAVEHISTORY
+/* state->flags is already checked to be nonzero */
+void load_history(const char *fromfile)
+{
+ FILE *fp;
+ int hi;
+
+ /* cleanup old */
+ for (hi = state->cnt_history; hi > 0;) {
+ hi--;
+ free(state->history[hi]);
+ }
+
+ fp = fopen(fromfile, "r");
+ if (fp) {
+ for (hi = 0; hi < MAX_HISTORY;) {
+ char * hl = xmalloc_getline(fp);
+ int l;
+
+ if (!hl)
+ break;
+ l = strlen(hl);
+ if (l >= BUFSIZ)
+ hl[BUFSIZ-1] = 0;
+ if (l == 0 || hl[0] == ' ') {
+ free(hl);
+ continue;
+ }
+ state->history[hi++] = hl;
+ }
+ fclose(fp);
+ }
+ state->cur_history = state->cnt_history = hi;
+}
+
+/* state->flags is already checked to be nonzero */
+void save_history(const char *tofile)
+{
+ FILE *fp;
+
+ fp = fopen(tofile, "w");
+ if (fp) {
+ int i;
+
+ for (i = 0; i < state->cnt_history; i++) {
+ fprintf(fp, "%s\n", state->history[i]);
+ }
+ fclose(fp);
+ }
+}
+#else
+#define load_history(a) ((void)0)
+#define save_history(a) ((void)0)
+#endif /* FEATURE_COMMAND_SAVEHISTORY */
+
+static void remember_in_history(const char *str)
+{
+ int i;
+
+ if (!(state->flags & DO_HISTORY))
+ return;
+
+ i = state->cnt_history;
+ free(state->history[MAX_HISTORY]);
+ state->history[MAX_HISTORY] = NULL;
+ /* After max history, remove the oldest command */
+ if (i >= MAX_HISTORY) {
+ free(state->history[0]);
+ for (i = 0; i < MAX_HISTORY-1; i++)
+ state->history[i] = state->history[i+1];
+ }
+// Maybe "if (!i || strcmp(history[i-1], command) != 0) ..."
+// (i.e. do not save dups?)
+ state->history[i++] = xstrdup(str);
+ state->cur_history = i;
+ state->cnt_history = i;
+ if (state->flags & SAVE_HISTORY)
+ save_history(state->hist_file);
+ USE_FEATURE_EDITING_FANCY_PROMPT(num_ok_lines++;)
+}
+
+#else /* MAX_HISTORY == 0 */
+#define remember_in_history(a) ((void)0)
+#endif /* MAX_HISTORY */
+
+
+/*
+ * This function is used to grab a character buffer
+ * from the input file descriptor and allows you to
+ * a string with full command editing (sort of 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
+ *
+ * Minimalist vi-style command line editing available if configured.
+ * vi mode implemented 2005 by Paul Fox <pgf@foxharp.boston.ma.us>
+ */
+
+#if ENABLE_FEATURE_EDITING_VI
+static void
+vi_Word_motion(char *command, int eat)
+{
+ while (cursor < command_len && !isspace(command[cursor]))
+ input_forward();
+ if (eat) while (cursor < command_len && isspace(command[cursor]))
+ input_forward();
+}
+
+static void
+vi_word_motion(char *command, int eat)
+{
+ if (isalnum(command[cursor]) || command[cursor] == '_') {
+ while (cursor < command_len
+ && (isalnum(command[cursor+1]) || command[cursor+1] == '_'))
+ input_forward();
+ } else if (ispunct(command[cursor])) {
+ while (cursor < command_len && ispunct(command[cursor+1]))
+ input_forward();
+ }
+
+ if (cursor < command_len)
+ input_forward();
+
+ if (eat && cursor < command_len && isspace(command[cursor]))
+ while (cursor < command_len && isspace(command[cursor]))
+ input_forward();
+}
+
+static void
+vi_End_motion(char *command)
+{
+ input_forward();
+ while (cursor < command_len && isspace(command[cursor]))
+ input_forward();
+ while (cursor < command_len-1 && !isspace(command[cursor+1]))
+ input_forward();
+}
+
+static void
+vi_end_motion(char *command)
+{
+ if (cursor >= command_len-1)
+ return;
+ input_forward();
+ while (cursor < command_len-1 && isspace(command[cursor]))
+ input_forward();
+ if (cursor >= command_len-1)
+ return;
+ if (isalnum(command[cursor]) || command[cursor] == '_') {
+ while (cursor < command_len-1
+ && (isalnum(command[cursor+1]) || command[cursor+1] == '_')
+ ) {
+ input_forward();
+ }
+ } else if (ispunct(command[cursor])) {
+ while (cursor < command_len-1 && ispunct(command[cursor+1]))
+ input_forward();
+ }
+}
+
+static void
+vi_Back_motion(char *command)
+{
+ while (cursor > 0 && isspace(command[cursor-1]))
+ input_backward(1);
+ while (cursor > 0 && !isspace(command[cursor-1]))
+ input_backward(1);
+}
+
+static void
+vi_back_motion(char *command)
+{
+ if (cursor <= 0)
+ return;
+ input_backward(1);
+ while (cursor > 0 && isspace(command[cursor]))
+ input_backward(1);
+ if (cursor <= 0)
+ return;
+ if (isalnum(command[cursor]) || command[cursor] == '_') {
+ while (cursor > 0
+ && (isalnum(command[cursor-1]) || command[cursor-1] == '_')
+ ) {
+ input_backward(1);
+ }
+ } else if (ispunct(command[cursor])) {
+ while (cursor > 0 && ispunct(command[cursor-1]))
+ input_backward(1);
+ }
+}
+#endif
+
+
+/*
+ * read_line_input and its helpers
+ */
+
+#if !ENABLE_FEATURE_EDITING_FANCY_PROMPT
+static void parse_prompt(const char *prmt_ptr)
+{
+ cmdedit_prompt = prmt_ptr;
+ cmdedit_prmt_len = strlen(prmt_ptr);
+ put_prompt();
+}
+#else
+static void parse_prompt(const char *prmt_ptr)
+{
+ int prmt_len = 0;
+ size_t cur_prmt_len = 0;
+ char flg_not_length = '[';
+ char *prmt_mem_ptr = xzalloc(1);
+ char *pwd_buf = xgetcwd(0);
+ char buf2[PATH_MAX + 1];
+ char buf[2];
+ char c;
+ char *pbuf;
+
+ cmdedit_prmt_len = 0;
+
+ if (!pwd_buf) {
+ pwd_buf = (char *)bb_msg_unknown;
+ }
+
+ while (*prmt_ptr) {
+ pbuf = buf;
+ pbuf[1] = 0;
+ c = *prmt_ptr++;
+ if (c == '\\') {
+ const char *cp = prmt_ptr;
+ int l;
+
+ c = bb_process_escape_sequence(&prmt_ptr);
+ if (prmt_ptr == cp) {
+ if (*cp == 0)
+ break;
+ c = *prmt_ptr++;
+ switch (c) {
+#if ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR
+ case 'u':
+ pbuf = user_buf;
+ break;
+#endif
+ case 'h':
+ pbuf = hostname_buf;
+ if (!pbuf) {
+ pbuf = xzalloc(256);
+ if (gethostname(pbuf, 255) < 0) {
+ strcpy(pbuf, "?");
+ } else {
+ char *s = strchr(pbuf, '.');
+ if (s)
+ *s = '\0';
+ }
+ hostname_buf = pbuf;
+ }
+ break;
+ case '$':
+ c = (geteuid() == 0 ? '#' : '$');
+ break;
+#if ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR
+ case 'w':
+ pbuf = pwd_buf;
+ l = strlen(home_pwd_buf);
+ if (home_pwd_buf[0] != 0
+ && strncmp(home_pwd_buf, pbuf, l) == 0
+ && (pbuf[l]=='/' || pbuf[l]=='\0')
+ && strlen(pwd_buf+l)<PATH_MAX
+ ) {
+ pbuf = buf2;
+ *pbuf = '~';
+ strcpy(pbuf+1, pwd_buf+l);
+ }
+ break;
+#endif
+ case 'W':
+ pbuf = pwd_buf;
+ cp = strrchr(pbuf,'/');
+ if (cp != NULL && cp != pbuf)
+ pbuf += (cp-pbuf) + 1;
+ break;
+ case '!':
+ pbuf = buf2;
+ snprintf(buf2, sizeof(buf2), "%d", num_ok_lines);
+ break;
+ case 'e': case 'E': /* \e \E = \033 */
+ c = '\033';
+ break;
+ case 'x': case 'X':
+ for (l = 0; l < 3;) {
+ int h;
+ buf2[l++] = *prmt_ptr;
+ buf2[l] = 0;
+ h = strtol(buf2, &pbuf, 16);
+ if (h > UCHAR_MAX || (pbuf - buf2) < l) {
+ l--;
+ break;
+ }
+ prmt_ptr++;
+ }
+ buf2[l] = 0;
+ c = (char)strtol(buf2, NULL, 16);
+ if (c == 0)
+ c = '?';
+ pbuf = buf;
+ break;
+ case '[': case ']':
+ if (c == flg_not_length) {
+ flg_not_length = flg_not_length == '[' ? ']' : '[';
+ continue;
+ }
+ break;
+ }
+ }
+ }
+ if (pbuf == buf)
+ *pbuf = c;
+ cur_prmt_len = strlen(pbuf);
+ prmt_len += cur_prmt_len;
+ if (flg_not_length != ']')
+ cmdedit_prmt_len += cur_prmt_len;
+ prmt_mem_ptr = strcat(xrealloc(prmt_mem_ptr, prmt_len+1), pbuf);
+ }
+ if (pwd_buf != (char *)bb_msg_unknown)
+ free(pwd_buf);
+ cmdedit_prompt = prmt_mem_ptr;
+ put_prompt();
+}
+#endif
+
+#define setTermSettings(fd, argp) tcsetattr(fd, TCSANOW, argp)
+#define getTermSettings(fd, argp) tcgetattr(fd, argp);
+
+static sighandler_t previous_SIGWINCH_handler;
+
+static void cmdedit_setwidth(unsigned w, int redraw_flg)
+{
+ cmdedit_termw = w;
+ if (redraw_flg) {
+ /* new y for current cursor */
+ int new_y = (cursor + cmdedit_prmt_len) / w;
+ /* redraw */
+ redraw((new_y >= cmdedit_y ? new_y : cmdedit_y), command_len - cursor);
+ fflush(stdout);
+ }
+}
+
+static void win_changed(int nsig)
+{
+ int width;
+ get_terminal_width_height(0, &width, NULL);
+ cmdedit_setwidth(width, nsig /* - just a yes/no flag */);
+ if (nsig == SIGWINCH)
+ signal(SIGWINCH, win_changed); /* rearm ourself */
+}
+
+/*
+ * The emacs and vi modes share much of the code in the big
+ * command loop. Commands entered when in vi's command mode (aka
+ * "escape mode") get an extra bit added to distinguish them --
+ * this keeps them from being self-inserted. This clutters the
+ * big switch a bit, but keeps all the code in one place.
+ */
+
+#define vbit 0x100
+
+/* leave out the "vi-mode"-only case labels if vi editing isn't
+ * configured. */
+#define vi_case(caselabel) USE_FEATURE_EDITING(case caselabel)
+
+/* convert uppercase ascii to equivalent control char, for readability */
+#undef CTRL
+#define CTRL(a) ((a) & ~0x40)
+
+int read_line_input(const char* prompt, char* command, int maxsize, line_input_t *st)
+{
+ static const int null_flags;
+
+ int lastWasTab = FALSE;
+ unsigned int ic;
+ unsigned char c;
+ smallint break_out = 0;
+#if ENABLE_FEATURE_EDITING_VI
+ smallint vi_cmdmode = 0;
+ smalluint prevc;
+#endif
+
+// FIXME: audit & improve this
+ if (maxsize > BUFSIZ)
+ maxsize = BUFSIZ;
+
+ /* With null flags, no other fields are ever used */
+ state = st ? st : (line_input_t*) &null_flags;
+ if (state->flags & SAVE_HISTORY)
+ load_history(state->hist_file);
+
+ /* prepare before init handlers */
+ cmdedit_y = 0; /* quasireal y, not true if line > xt*yt */
+ command_len = 0;
+ command_ps = command;
+ command[0] = '\0';
+
+ getTermSettings(0, (void *) &initial_settings);
+ memcpy(&new_settings, &initial_settings, sizeof(new_settings));
+ new_settings.c_lflag &= ~ICANON; /* unbuffered input */
+ /* Turn off echoing and CTRL-C, so we can trap it */
+ new_settings.c_lflag &= ~(ECHO | ECHONL | ISIG);
+ /* Hmm, in linux c_cc[] is not parsed if ICANON is off */
+ new_settings.c_cc[VMIN] = 1;
+ new_settings.c_cc[VTIME] = 0;
+ /* Turn off CTRL-C, so we can trap it */
+#ifndef _POSIX_VDISABLE
+#define _POSIX_VDISABLE '\0'
+#endif
+ new_settings.c_cc[VINTR] = _POSIX_VDISABLE;
+ setTermSettings(0, (void *) &new_settings);
+
+ /* Now initialize things */
+ previous_SIGWINCH_handler = signal(SIGWINCH, win_changed);
+ win_changed(0); /* do initial resizing */
+#if ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR
+ {
+ struct passwd *entry;
+
+ entry = getpwuid(geteuid());
+ if (entry) {
+ user_buf = xstrdup(entry->pw_name);
+ home_pwd_buf = xstrdup(entry->pw_dir);
+ }
+ }
+#endif
+#if ENABLE_FEATURE_TAB_COMPLETION
+ my_uid = getuid();
+ my_gid = getgid();
+#endif
+ /* Print out the command prompt */
+ parse_prompt(prompt);
+
+ while (1) {
+ fflush(stdout);
+
+ if (safe_read(0, &c, 1) < 1) {
+ /* if we can't read input then exit */
+ goto prepare_to_die;
+ }
+
+ ic = c;
+
+#if ENABLE_FEATURE_EDITING_VI
+ newdelflag = 1;
+ if (vi_cmdmode)
+ ic |= vbit;
+#endif
+ switch (ic) {
+ case '\n':
+ case '\r':
+ vi_case('\n'|vbit:)
+ vi_case('\r'|vbit:)
+ /* Enter */
+ goto_new_line();
+ break_out = 1;
+ break;
+#if ENABLE_FEATURE_EDITING_FANCY_KEYS
+ case CTRL('A'):
+ vi_case('0'|vbit:)
+ /* Control-a -- Beginning of line */
+ input_backward(cursor);
+ break;
+ case CTRL('B'):
+ vi_case('h'|vbit:)
+ vi_case('\b'|vbit:)
+ vi_case('\x7f'|vbit:) /* DEL */
+ /* Control-b -- Move back one character */
+ input_backward(1);
+ break;
+#endif
+ case CTRL('C'):
+ vi_case(CTRL('C')|vbit:)
+ /* Control-c -- stop gathering input */
+ goto_new_line();
+ command_len = 0;
+ break_out = -1; /* "do not append '\n'" */
+ break;
+ case CTRL('D'):
+ /* Control-d -- Delete one character, or exit
+ * if the len=0 and no chars to delete */
+ if (command_len == 0) {
+ errno = 0;
+ prepare_to_die:
+ /* to control stopped jobs */
+ break_out = command_len = -1;
+ break;
+ }
+ input_delete(0);
+ break;
+
+#if ENABLE_FEATURE_EDITING_FANCY_KEYS
+ case CTRL('E'):
+ vi_case('$'|vbit:)
+ /* Control-e -- End of line */
+ input_end();
+ break;
+ case CTRL('F'):
+ vi_case('l'|vbit:)
+ vi_case(' '|vbit:)
+ /* Control-f -- Move forward one character */
+ input_forward();
+ break;
+#endif
+
+ case '\b':
+ case '\x7f': /* DEL */
+ /* Control-h and DEL */
+ input_backspace();
+ break;
+
+ case '\t':
+ input_tab(&lastWasTab);
+ break;
+
+#if ENABLE_FEATURE_EDITING_FANCY_KEYS
+ case CTRL('K'):
+ /* Control-k -- clear to end of line */
+ command[cursor] = 0;
+ command_len = cursor;
+ printf("\033[J");
+ break;
+ case CTRL('L'):
+ vi_case(CTRL('L')|vbit:)
+ /* Control-l -- clear screen */
+ printf("\033[H");
+ redraw(0, command_len - cursor);
+ break;
+#endif
+
+#if MAX_HISTORY > 0
+ case CTRL('N'):
+ vi_case(CTRL('N')|vbit:)
+ vi_case('j'|vbit:)
+ /* Control-n -- Get next command in history */
+ if (get_next_history())
+ goto rewrite_line;
+ break;
+ case CTRL('P'):
+ vi_case(CTRL('P')|vbit:)
+ vi_case('k'|vbit:)
+ /* Control-p -- Get previous command from history */
+ if ((state->flags & DO_HISTORY) && state->cur_history > 0) {
+ get_previous_history();
+ goto rewrite_line;
+ }
+ beep();
+ break;
+#endif
+
+#if ENABLE_FEATURE_EDITING_FANCY_KEYS
+ case CTRL('U'):
+ vi_case(CTRL('U')|vbit:)
+ /* Control-U -- Clear line before cursor */
+ if (cursor) {
+ strcpy(command, command + cursor);
+ command_len -= cursor;
+ redraw(cmdedit_y, command_len);
+ }
+ break;
+#endif
+ case CTRL('W'):
+ vi_case(CTRL('W')|vbit:)
+ /* Control-W -- Remove the last word */
+ while (cursor > 0 && isspace(command[cursor-1]))
+ input_backspace();
+ while (cursor > 0 && !isspace(command[cursor-1]))
+ input_backspace();
+ break;
+
+#if ENABLE_FEATURE_EDITING_VI
+ case 'i'|vbit:
+ vi_cmdmode = 0;
+ break;
+ case 'I'|vbit:
+ input_backward(cursor);
+ vi_cmdmode = 0;
+ break;
+ case 'a'|vbit:
+ input_forward();
+ vi_cmdmode = 0;
+ break;
+ case 'A'|vbit:
+ input_end();
+ vi_cmdmode = 0;
+ break;
+ case 'x'|vbit:
+ input_delete(1);
+ break;
+ case 'X'|vbit:
+ if (cursor > 0) {
+ input_backward(1);
+ input_delete(1);
+ }
+ break;
+ case 'W'|vbit:
+ vi_Word_motion(command, 1);
+ break;
+ case 'w'|vbit:
+ vi_word_motion(command, 1);
+ break;
+ case 'E'|vbit:
+ vi_End_motion(command);
+ break;
+ case 'e'|vbit:
+ vi_end_motion(command);
+ break;
+ case 'B'|vbit:
+ vi_Back_motion(command);
+ break;
+ case 'b'|vbit:
+ vi_back_motion(command);
+ break;
+ case 'C'|vbit:
+ vi_cmdmode = 0;
+ /* fall through */
+ case 'D'|vbit:
+ goto clear_to_eol;
+
+ case 'c'|vbit:
+ vi_cmdmode = 0;
+ /* fall through */
+ case 'd'|vbit: {
+ int nc, sc;
+ sc = cursor;
+ prevc = ic;
+ if (safe_read(0, &c, 1) < 1)
+ goto prepare_to_die;
+ if (c == (prevc & 0xff)) {
+ /* "cc", "dd" */
+ input_backward(cursor);
+ goto clear_to_eol;
+ break;
+ }
+ switch (c) {
+ case 'w':
+ case 'W':
+ case 'e':
+ case 'E':
+ switch (c) {
+ case 'w': /* "dw", "cw" */
+ vi_word_motion(command, vi_cmdmode);
+ break;
+ case 'W': /* 'dW', 'cW' */
+ vi_Word_motion(command, vi_cmdmode);
+ break;
+ case 'e': /* 'de', 'ce' */
+ vi_end_motion(command);
+ input_forward();
+ break;
+ case 'E': /* 'dE', 'cE' */
+ vi_End_motion(command);
+ input_forward();
+ break;
+ }
+ nc = cursor;
+ input_backward(cursor - sc);
+ while (nc-- > cursor)
+ input_delete(1);
+ break;
+ case 'b': /* "db", "cb" */
+ case 'B': /* implemented as B */
+ if (c == 'b')
+ vi_back_motion(command);
+ else
+ vi_Back_motion(command);
+ while (sc-- > cursor)
+ input_delete(1);
+ break;
+ case ' ': /* "d ", "c " */
+ input_delete(1);
+ break;
+ case '$': /* "d$", "c$" */
+ clear_to_eol:
+ while (cursor < command_len)
+ input_delete(1);
+ break;
+ }
+ break;
+ }
+ case 'p'|vbit:
+ input_forward();
+ /* fallthrough */
+ case 'P'|vbit:
+ put();
+ break;
+ case 'r'|vbit:
+ if (safe_read(0, &c, 1) < 1)
+ goto prepare_to_die;
+ if (c == 0)
+ beep();
+ else {
+ *(command + cursor) = c;
+ putchar(c);
+ putchar('\b');
+ }
+ break;
+#endif /* FEATURE_COMMAND_EDITING_VI */
+
+ case '\x1b': /* ESC */
+
+#if ENABLE_FEATURE_EDITING_VI
+ if (state->flags & VI_MODE) {
+ /* ESC: insert mode --> command mode */
+ vi_cmdmode = 1;
+ input_backward(1);
+ break;
+ }
+#endif
+ /* escape sequence follows */
+ if (safe_read(0, &c, 1) < 1)
+ goto prepare_to_die;
+ /* different vt100 emulations */
+ if (c == '[' || c == 'O') {
+ vi_case('['|vbit:)
+ vi_case('O'|vbit:)
+ if (safe_read(0, &c, 1) < 1)
+ goto prepare_to_die;
+ }
+ if (c >= '1' && c <= '9') {
+ unsigned char dummy;
+
+ if (safe_read(0, &dummy, 1) < 1)
+ goto prepare_to_die;
+ if (dummy != '~')
+ c = '\0';
+ }
+
+ switch (c) {
+#if ENABLE_FEATURE_TAB_COMPLETION
+ case '\t': /* Alt-Tab */
+ input_tab(&lastWasTab);
+ break;
+#endif
+#if MAX_HISTORY > 0
+ case 'A':
+ /* Up Arrow -- Get previous command from history */
+ if ((state->flags & DO_HISTORY) && state->cur_history > 0) {
+ get_previous_history();
+ goto rewrite_line;
+ }
+ beep();
+ break;
+ case 'B':
+ /* Down Arrow -- Get next command in history */
+ if (!get_next_history())
+ break;
+ rewrite_line:
+ /* Rewrite the line with the selected history item */
+ /* change command */
+ command_len = strlen(strcpy(command, state->history[state->cur_history]));
+ /* redraw and go to eol (bol, in vi */
+ redraw(cmdedit_y, (state->flags & VI_MODE) ? 9999 : 0);
+ break;
+#endif
+ 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(0);
+ break;
+ case '1':
+ case 'H':
+ /* <Home> */
+ input_backward(cursor);
+ break;
+ case '4':
+ case 'F':
+ /* <End> */
+ input_end();
+ break;
+ default:
+ c = '\0';
+ beep();
+ }
+ break;
+
+ default: /* If it's regular input, do the normal thing */
+#if ENABLE_FEATURE_NONPRINTABLE_INVERSE_PUT
+ /* Control-V -- Add non-printable symbol */
+ if (c == CTRL('V')) {
+ if (safe_read(0, &c, 1) < 1)
+ goto prepare_to_die;
+ if (c == 0) {
+ beep();
+ break;
+ }
+ } else
+#endif
+
+#if ENABLE_FEATURE_EDITING_VI
+ if (vi_cmdmode) /* Don't self-insert */
+ break;
+#endif
+ if (!Isprint(c)) /* Skip non-printable characters */
+ break;
+
+ if (command_len >= (maxsize - 2)) /* Need to leave space for enter */
+ break;
+
+ command_len++;
+ if (cursor == (command_len - 1)) { /* Append if at the end of the line */
+ command[cursor] = c;
+ command[cursor+1] = '\0';
+ cmdedit_set_out_char(' ');
+ } else { /* Insert otherwise */
+ int sc = cursor;
+
+ memmove(command + sc + 1, command + sc, command_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;
+ }
+
+ if (command_len > 0)
+ remember_in_history(command);
+
+ if (break_out > 0) {
+ command[command_len++] = '\n';
+ command[command_len] = '\0';
+ }
+
+#if ENABLE_FEATURE_CLEAN_UP && ENABLE_FEATURE_TAB_COMPLETION
+ free_tab_completion_data();
+#endif
+
+#if ENABLE_FEATURE_EDITING_FANCY_PROMPT
+ free((char*)cmdedit_prompt);
+#endif
+ /* restore initial_settings */
+ setTermSettings(STDIN_FILENO, (void *) &initial_settings);
+ /* restore SIGWINCH handler */
+ signal(SIGWINCH, previous_SIGWINCH_handler);
+ fflush(stdout);
+ return command_len;
+}
+
+line_input_t *new_line_input_t(int flags)
+{
+ line_input_t *n = xzalloc(sizeof(*n));
+ n->flags = flags;
+ return n;
+}
+
+#else
+
+#undef read_line_input
+int read_line_input(const char* prompt, char* command, int maxsize)
+{
+ fputs(prompt, stdout);
+ fflush(stdout);
+ fgets(command, maxsize, stdin);
+ return strlen(command);
+}
+
+#endif /* FEATURE_COMMAND_EDITING */
+
+
+/*
+ * Testing
+ */
+
+#ifdef TEST
+
+#include <locale.h>
+
+const char *applet_name = "debug stuff usage";
+
+int main(int argc, char **argv)
+{
+ char buff[BUFSIZ];
+ char *prompt =
+#if ENABLE_FEATURE_EDITING_FANCY_PROMPT
+ "\\[\\033[32;1m\\]\\u@\\[\\x1b[33;1m\\]\\h:"
+ "\\[\\033[34;1m\\]\\w\\[\\033[35;1m\\] "
+ "\\!\\[\\e[36;1m\\]\\$ \\[\\E[0m\\]";
+#else
+ "% ";
+#endif
+
+#if ENABLE_FEATURE_NONPRINTABLE_INVERSE_PUT
+ setlocale(LC_ALL, "");
+#endif
+ while (1) {
+ int l;
+ l = read_line_input(prompt, buff);
+ if (l <= 0 || buff[l-1] != '\n')
+ break;
+ buff[l-1] = 0;
+ printf("*** read_line_input() returned line =%s=\n", buff);
+ }
+ printf("*** read_line_input() detect ^D\n");
+ return 0;
+}
+
+#endif /* TEST */