| /* 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. |
| * |
| * lineedit does not know that the terminal escape sequences do not |
| * take up space on the screen. The redisplay code assumes, unless |
| * told otherwise, that each character in the prompt is a printable |
| * character that takes up one character position on the screen. |
| * You need to tell lineedit that some sequences of characters |
| * in the prompt take up no screen space. Compatibly with readline, |
| * use the \[ escape to begin a sequence of non-printing characters, |
| * and the \] escape to signal the end of such a sequence. Example: |
| * |
| * PS1='\[\033[01;32m\]\u@\h\[\033[01;34m\] \w \$\[\033[00m\] ' |
| */ |
| |
| #include "libbb.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 |
| |
| #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) |
| #define IF_FEATURE_GETUSERNAME_AND_HOMEDIR(...) |
| #if ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR |
| #undef IF_FEATURE_GETUSERNAME_AND_HOMEDIR |
| #define IF_FEATURE_GETUSERNAME_AND_HOMEDIR(...) __VA_ARGS__ |
| #endif |
| |
| enum { |
| /* We use int16_t for positions, need to limit line len */ |
| MAX_LINELEN = CONFIG_FEATURE_EDITING_MAX_LEN < 0x7ff0 |
| ? CONFIG_FEATURE_EDITING_MAX_LEN |
| : 0x7ff0 |
| }; |
| |
| #if ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR |
| static const char null_str[] ALIGN1 = ""; |
| #endif |
| |
| /* We try to minimize both static and stack usage. */ |
| struct lineedit_statics { |
| line_input_t *state; |
| |
| volatile unsigned cmdedit_termw; /* = 80; */ /* actual terminal width */ |
| sighandler_t previous_SIGWINCH_handler; |
| |
| unsigned cmdedit_x; /* real x (col) terminal position */ |
| unsigned cmdedit_y; /* pseudoreal y (row) terminal position */ |
| unsigned cmdedit_prmt_len; /* length of prompt (without colors etc) */ |
| |
| unsigned cursor; |
| unsigned command_len; |
| char *command_ps; |
| |
| const char *cmdedit_prompt; |
| #if ENABLE_FEATURE_EDITING_FANCY_PROMPT |
| int num_ok_lines; /* = 1; */ |
| #endif |
| |
| #if ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR |
| char *user_buf; |
| char *home_pwd_buf; /* = (char*)null_str; */ |
| #endif |
| |
| #if ENABLE_FEATURE_TAB_COMPLETION |
| char **matches; |
| unsigned num_matches; |
| #endif |
| |
| #if ENABLE_FEATURE_EDITING_VI |
| #define DELBUFSIZ 128 |
| char *delptr; |
| smallint newdelflag; /* whether delbuf should be reused yet */ |
| char delbuf[DELBUFSIZ]; /* a place to store deleted characters */ |
| #endif |
| |
| /* Formerly these were big buffers on stack: */ |
| #if ENABLE_FEATURE_TAB_COMPLETION |
| char exe_n_cwd_tab_completion__dirbuf[MAX_LINELEN]; |
| char input_tab__matchBuf[MAX_LINELEN]; |
| int16_t find_match__int_buf[MAX_LINELEN + 1]; /* need to have 9 bits at least */ |
| int16_t find_match__pos_buf[MAX_LINELEN + 1]; |
| #endif |
| }; |
| |
| /* See lineedit_ptr_hack.c */ |
| extern struct lineedit_statics *const lineedit_ptr_to_statics; |
| |
| #define S (*lineedit_ptr_to_statics) |
| #define state (S.state ) |
| #define cmdedit_termw (S.cmdedit_termw ) |
| #define previous_SIGWINCH_handler (S.previous_SIGWINCH_handler) |
| #define cmdedit_x (S.cmdedit_x ) |
| #define cmdedit_y (S.cmdedit_y ) |
| #define cmdedit_prmt_len (S.cmdedit_prmt_len) |
| #define cursor (S.cursor ) |
| #define command_len (S.command_len ) |
| #define command_ps (S.command_ps ) |
| #define cmdedit_prompt (S.cmdedit_prompt ) |
| #define num_ok_lines (S.num_ok_lines ) |
| #define user_buf (S.user_buf ) |
| #define home_pwd_buf (S.home_pwd_buf ) |
| #define matches (S.matches ) |
| #define num_matches (S.num_matches ) |
| #define delptr (S.delptr ) |
| #define newdelflag (S.newdelflag ) |
| #define delbuf (S.delbuf ) |
| |
| #define INIT_S() do { \ |
| (*(struct lineedit_statics**)&lineedit_ptr_to_statics) = xzalloc(sizeof(S)); \ |
| barrier(); \ |
| cmdedit_termw = 80; \ |
| IF_FEATURE_EDITING_FANCY_PROMPT(num_ok_lines = 1;) \ |
| IF_FEATURE_GETUSERNAME_AND_HOMEDIR(home_pwd_buf = (char*)null_str;) \ |
| } while (0) |
| static void deinit_S(void) |
| { |
| #if ENABLE_FEATURE_EDITING_FANCY_PROMPT |
| /* This one is allocated only if FANCY_PROMPT is on |
| * (otherwise it points to verbatim prompt (NOT malloced) */ |
| free((char*)cmdedit_prompt); |
| #endif |
| #if ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR |
| free(user_buf); |
| if (home_pwd_buf != null_str) |
| free(home_pwd_buf); |
| #endif |
| free(lineedit_ptr_to_statics); |
| } |
| #define DEINIT_S() deinit_S() |
| |
| |
| /* 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' */ |
| #define HACK_FOR_WRONG_WIDTH 1 |
| #if HACK_FOR_WRONG_WIDTH |
| static void cmdedit_set_out_char(void) |
| #define cmdedit_set_out_char(next_char) cmdedit_set_out_char() |
| #else |
| static void cmdedit_set_out_char(int next_char) |
| #endif |
| { |
| 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 |
| { |
| bb_putchar(c); |
| } |
| if (++cmdedit_x >= cmdedit_termw) { |
| /* terminal is scrolled down */ |
| cmdedit_y++; |
| cmdedit_x = 0; |
| #if HACK_FOR_WRONG_WIDTH |
| /* This works better if our idea of term width is wrong |
| * and it is actually wider (often happens on serial lines). |
| * Printing CR,LF *forces* cursor to next line. |
| * OTOH if terminal width is correct AND terminal does NOT |
| * have automargin (IOW: it is moving cursor to next line |
| * by itself (which is wrong for VT-10x terminals)), |
| * this will break things: there will be one extra empty line */ |
| puts("\r"); /* + implicit '\n' */ |
| #else |
| /* Works ok only if cmdedit_termw is correct */ |
| /* destroy "(auto)margin" */ |
| bb_putchar(next_char); |
| bb_putchar('\b'); |
| #endif |
| } |
| // 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) |
| bb_putchar('\n'); |
| } |
| |
| |
| static void out1str(const char *s) |
| { |
| if (s) |
| fputs(s, stdout); |
| } |
| |
| static void beep(void) |
| { |
| bb_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) { |
| /* This is longer by 5 bytes on x86. |
| * Also gets miscompiled for ARM users |
| * (busybox.net/bugs/view.php?id=2274). |
| * printf(("\b\b\b\b" + 4) - num); |
| * return; |
| */ |
| do { |
| bb_putchar('\b'); |
| } while (--num); |
| return; |
| } |
| printf("\033[%uD", num); |
| return; |
| } |
| |
| /* Need to go one or more lines up */ |
| num -= cmdedit_x; |
| { |
| unsigned w = cmdedit_termw; /* volatile var */ |
| count_y = 1 + (num / w); |
| cmdedit_y -= count_y; |
| cmdedit_x = w * count_y - num; |
| } |
| /* go to 1st column; go up; go to correct column */ |
| printf("\r" "\033[%dA" "\033[%dC", count_y, cmdedit_x); |
| } |
| |
| static void put_prompt(void) |
| { |
| out1str(cmdedit_prompt); |
| if (ENABLE_FEATURE_EDITING_ASK_TERMINAL) { |
| /* Ask terminal where is the cursor now. |
| * lineedit_read_key handles response and corrects |
| * our idea of current cursor position. |
| * Testcase: run "echo -n long_line_long_line_long_line", |
| * then type in a long, wrapping command and try to |
| * delete it using backspace key. |
| * Note: we print it _after_ prompt, because |
| * prompt may contain CR. Example: PS1='\[\r\n\]\w ' |
| */ |
| out1str("\033" "[6n"); |
| } |
| cursor = 0; |
| { |
| unsigned w = cmdedit_termw; /* volatile var */ |
| cmdedit_y = cmdedit_prmt_len / w; /* new quasireal y */ |
| cmdedit_x = cmdedit_prmt_len % w; |
| } |
| } |
| |
| /* 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); |
| bb_putchar('\r'); |
| put_prompt(); |
| input_end(); /* rewrite */ |
| printf("\033[J"); /* erase after cursor */ |
| input_backward(back_cursor); |
| } |
| |
| /* Delete the char in front of the cursor, optionally saving it |
| * for later putback */ |
| #if !ENABLE_FEATURE_EDITING_VI |
| static void input_delete(void) |
| #define input_delete(save) input_delete() |
| #else |
| static void input_delete(int save) |
| #endif |
| { |
| int j = cursor; |
| |
| if (j == (int)command_len) |
| return; |
| |
| #if ENABLE_FEATURE_EDITING_VI |
| if (save) { |
| if (newdelflag) { |
| delptr = delbuf; |
| newdelflag = 0; |
| } |
| if ((delptr - delbuf) < DELBUFSIZ) |
| *delptr++ = command_ps[j]; |
| } |
| #endif |
| |
| overlapping_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 = delptr - 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 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) |
| { |
| matches = xrealloc_vector(matches, 4, num_matches); |
| matches[num_matches] = 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 = NULL; |
| |
| if (*ud == '/') { /* "~/..." */ |
| home = home_pwd_buf; |
| } else { |
| /* "~user/..." */ |
| char *temp; |
| 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) < MAX_LINELEN) { |
| /* /home/user/... */ |
| sprintf(sav_ud, "%s%s", home, ud); |
| } |
| } |
| } else { |
| /* "~[^/]*" */ |
| /* Using _r function to avoid pulling in static buffers */ |
| char line_buff[256]; |
| struct passwd pwd; |
| struct passwd *result; |
| |
| setpwent(); |
| while (!getpwent_r(&pwd, line_buff, sizeof(line_buff), &result)) { |
| /* Null usernames should result in all users as possible completions. */ |
| if (/*!userlen || */ strncmp(ud, pwd.pw_name, userlen) == 0) { |
| add_match(xasprintf("~%s/", pwd.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; |
| struct stat st; |
| char *path1[1]; |
| char **paths = path1; |
| int npaths; |
| int i; |
| char *found; |
| char *pfind = strrchr(command, '/'); |
| /* char dirbuf[MAX_LINELEN]; */ |
| #define dirbuf (S.exe_n_cwd_tab_completion__dirbuf) |
| |
| npaths = 1; |
| path1[0] = (char*)"."; |
| |
| 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) |
| continue; /* don't print an error */ |
| |
| while ((next = readdir(dir)) != NULL) { |
| int len1; |
| const 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, remove in progress? */ |
| /* NB: stat() first so that we see is it a directory; |
| * but if that fails, use lstat() so that |
| * we still match dangling links */ |
| if (stat(found, &st) && lstat(found, &st)) |
| 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 a 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 is only in first member */ |
| free(paths); |
| } |
| #undef dirbuf |
| } |
| |
| #define QUOT (UCHAR_MAX+1) |
| |
| #define collapse_pos(is, in) do { \ |
| memmove(int_buf+(is), int_buf+(in), (MAX_LINELEN+1-(is)-(in)) * sizeof(pos_buf[0])); \ |
| memmove(pos_buf+(is), pos_buf+(in), (MAX_LINELEN+1-(is)-(in)) * sizeof(pos_buf[0])); \ |
| } while (0) |
| |
| static int find_match(char *matchBuf, int *len_with_quotes) |
| { |
| int i, j; |
| int command_mode; |
| int c, c2; |
| /* int16_t int_buf[MAX_LINELEN + 1]; */ |
| /* int16_t pos_buf[MAX_LINELEN + 1]; */ |
| #define int_buf (S.find_match__int_buf) |
| #define pos_buf (S.find_match__pos_buf) |
| |
| /* 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 length matchBuf with quotes symbols */ |
| *len_with_quotes = j ? j - pos_buf[0] : 0; |
| |
| return command_mode; |
| #undef int_buf |
| #undef pos_buf |
| } |
| |
| /* |
| * 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])), ""); |
| } |
| puts(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; |
| } |
| |
| /* Do TAB completion */ |
| static void input_tab(smallint *lastWasTab) |
| { |
| if (!(state->flags & TAB_COMPLETION)) |
| return; |
| |
| if (!*lastWasTab) { |
| char *tmp, *tmp1; |
| size_t len_found; |
| /* char matchBuf[MAX_LINELEN]; */ |
| #define matchBuf (S.input_tab__matchBuf) |
| 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) { |
| unsigned i; |
| int n = 0; |
| qsort_string_vector(matches, num_matches); |
| 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) < MAX_LINELEN) { |
| /* 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); |
| #undef matchBuf |
| } 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); |
| } |
| } |
| } |
| |
| #endif /* FEATURE_COMMAND_TAB_COMPLETION */ |
| |
| |
| line_input_t* FAST_FUNC new_line_input_t(int flags) |
| { |
| line_input_t *n = xzalloc(sizeof(*n)); |
| n->flags = flags; |
| return n; |
| } |
| |
| |
| #if MAX_HISTORY > 0 |
| |
| static void save_command_ps_at_cur_history(void) |
| { |
| if (command_ps[0] != '\0') { |
| int cur = state->cur_history; |
| free(state->history[cur]); |
| state->history[cur] = xstrdup(command_ps); |
| } |
| } |
| |
| /* state->flags is already checked to be nonzero */ |
| static int get_previous_history(void) |
| { |
| if ((state->flags & DO_HISTORY) && state->cur_history) { |
| save_command_ps_at_cur_history(); |
| state->cur_history--; |
| return 1; |
| } |
| beep(); |
| return 0; |
| } |
| |
| static int get_next_history(void) |
| { |
| if (state->flags & DO_HISTORY) { |
| if (state->cur_history < state->cnt_history) { |
| save_command_ps_at_cur_history(); /* save the current history line */ |
| return ++state->cur_history; |
| } |
| } |
| beep(); |
| return 0; |
| } |
| |
| #if ENABLE_FEATURE_EDITING_SAVEHISTORY |
| /* We try to ensure that concurrent additions to the history |
| * do not overwrite each other. |
| * Otherwise shell users get unhappy. |
| * |
| * History file is trimmed lazily, when it grows several times longer |
| * than configured MAX_HISTORY lines. |
| */ |
| |
| static void free_line_input_t(line_input_t *n) |
| { |
| int i = n->cnt_history; |
| while (i > 0) |
| free(n->history[--i]); |
| free(n); |
| } |
| |
| /* state->flags is already checked to be nonzero */ |
| static void load_history(line_input_t *st_parm) |
| { |
| char *temp_h[MAX_HISTORY]; |
| char *line; |
| FILE *fp; |
| unsigned idx, i, line_len; |
| |
| /* NB: do not trash old history if file can't be opened */ |
| |
| fp = fopen_for_read(st_parm->hist_file); |
| if (fp) { |
| /* clean up old history */ |
| for (idx = st_parm->cnt_history; idx > 0;) { |
| idx--; |
| free(st_parm->history[idx]); |
| st_parm->history[idx] = NULL; |
| } |
| |
| /* fill temp_h[], retaining only last MAX_HISTORY lines */ |
| memset(temp_h, 0, sizeof(temp_h)); |
| st_parm->cnt_history_in_file = idx = 0; |
| while ((line = xmalloc_fgetline(fp)) != NULL) { |
| if (line[0] == '\0') { |
| free(line); |
| continue; |
| } |
| free(temp_h[idx]); |
| temp_h[idx] = line; |
| st_parm->cnt_history_in_file++; |
| idx++; |
| if (idx == MAX_HISTORY) |
| idx = 0; |
| } |
| fclose(fp); |
| |
| /* find first non-NULL temp_h[], if any */ |
| if (st_parm->cnt_history_in_file) { |
| while (temp_h[idx] == NULL) { |
| idx++; |
| if (idx == MAX_HISTORY) |
| idx = 0; |
| } |
| } |
| |
| /* copy temp_h[] to st_parm->history[] */ |
| for (i = 0; i < MAX_HISTORY;) { |
| line = temp_h[idx]; |
| if (!line) |
| break; |
| idx++; |
| if (idx == MAX_HISTORY) |
| idx = 0; |
| line_len = strlen(line); |
| if (line_len >= MAX_LINELEN) |
| line[MAX_LINELEN-1] = '\0'; |
| st_parm->history[i++] = line; |
| } |
| st_parm->cnt_history = i; |
| } |
| } |
| |
| /* state->flags is already checked to be nonzero */ |
| static void save_history(char *str) |
| { |
| int fd; |
| int len, len2; |
| |
| fd = open(state->hist_file, O_WRONLY | O_CREAT | O_APPEND, 0666); |
| if (fd < 0) |
| return; |
| xlseek(fd, 0, SEEK_END); /* paranoia */ |
| len = strlen(str); |
| str[len] = '\n'; /* we (try to) do atomic write */ |
| len2 = full_write(fd, str, len + 1); |
| str[len] = '\0'; |
| close(fd); |
| if (len2 != len + 1) |
| return; /* "wtf?" */ |
| |
| /* did we write so much that history file needs trimming? */ |
| state->cnt_history_in_file++; |
| if (state->cnt_history_in_file > MAX_HISTORY * 4) { |
| FILE *fp; |
| char *new_name; |
| line_input_t *st_temp; |
| int i; |
| |
| /* we may have concurrently written entries from others. |
| * load them */ |
| st_temp = new_line_input_t(state->flags); |
| st_temp->hist_file = state->hist_file; |
| load_history(st_temp); |
| |
| /* write out temp file and replace hist_file atomically */ |
| new_name = xasprintf("%s.%u.new", state->hist_file, (int) getpid()); |
| fp = fopen_for_write(new_name); |
| if (fp) { |
| for (i = 0; i < st_temp->cnt_history; i++) |
| fprintf(fp, "%s\n", st_temp->history[i]); |
| fclose(fp); |
| if (rename(new_name, state->hist_file) == 0) |
| state->cnt_history_in_file = st_temp->cnt_history; |
| } |
| free(new_name); |
| free_line_input_t(st_temp); |
| } |
| } |
| #else |
| #define load_history(a) ((void)0) |
| #define save_history(a) ((void)0) |
| #endif /* FEATURE_COMMAND_SAVEHISTORY */ |
| |
| static void remember_in_history(char *str) |
| { |
| int i; |
| |
| if (!(state->flags & DO_HISTORY)) |
| return; |
| if (str[0] == '\0') |
| return; |
| i = state->cnt_history; |
| /* Don't save dupes */ |
| if (i && strcmp(state->history[i-1], str) == 0) |
| return; |
| |
| free(state->history[MAX_HISTORY]); /* redundant, paranoia */ |
| state->history[MAX_HISTORY] = NULL; /* redundant, paranoia */ |
| |
| /* If history[] is full, remove the oldest command */ |
| /* we need to keep history[MAX_HISTORY] empty, hence >=, not > */ |
| if (i >= MAX_HISTORY) { |
| free(state->history[0]); |
| for (i = 0; i < MAX_HISTORY-1; i++) |
| state->history[i] = state->history[i+1]; |
| /* i == MAX_HISTORY-1 */ |
| } |
| /* i <= MAX_HISTORY-1 */ |
| state->history[i++] = xstrdup(str); |
| /* i <= MAX_HISTORY */ |
| state->cur_history = i; |
| state->cnt_history = i; |
| #if ENABLE_FEATURE_EDITING_SAVEHISTORY |
| if ((state->flags & SAVE_HISTORY) && state->hist_file) |
| save_history(str); |
| #endif |
| IF_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_and_put_prompt(const char *prmt_ptr) |
| { |
| cmdedit_prompt = prmt_ptr; |
| cmdedit_prmt_len = strlen(prmt_ptr); |
| put_prompt(); |
| } |
| #else |
| static void parse_and_put_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 *cwd_buf = xrealloc_getcwd_or_warn(NULL); |
| char cbuf[2]; |
| char c; |
| char *pbuf; |
| |
| cmdedit_prmt_len = 0; |
| |
| if (!cwd_buf) { |
| cwd_buf = (char *)bb_msg_unknown; |
| } |
| |
| cbuf[1] = '\0'; /* never changes */ |
| |
| while (*prmt_ptr) { |
| char *free_me = NULL; |
| |
| pbuf = cbuf; |
| 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 ? user_buf : (char*)""; |
| break; |
| #endif |
| case 'h': |
| pbuf = free_me = safe_gethostname(); |
| *strchrnul(pbuf, '.') = '\0'; |
| break; |
| case '$': |
| c = (geteuid() == 0 ? '#' : '$'); |
| break; |
| #if ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR |
| case 'w': |
| /* /home/user[/something] -> ~[/something] */ |
| pbuf = cwd_buf; |
| l = strlen(home_pwd_buf); |
| if (l != 0 |
| && strncmp(home_pwd_buf, cwd_buf, l) == 0 |
| && (cwd_buf[l]=='/' || cwd_buf[l]=='\0') |
| && strlen(cwd_buf + l) < PATH_MAX |
| ) { |
| pbuf = free_me = xasprintf("~%s", cwd_buf + l); |
| } |
| break; |
| #endif |
| case 'W': |
| pbuf = cwd_buf; |
| cp = strrchr(pbuf, '/'); |
| if (cp != NULL && cp != pbuf) |
| pbuf += (cp-pbuf) + 1; |
| break; |
| case '!': |
| pbuf = free_me = xasprintf("%d", num_ok_lines); |
| break; |
| case 'e': case 'E': /* \e \E = \033 */ |
| c = '\033'; |
| break; |
| case 'x': case 'X': { |
| char buf2[4]; |
| for (l = 0; l < 3;) { |
| unsigned h; |
| buf2[l++] = *prmt_ptr; |
| buf2[l] = '\0'; |
| h = strtoul(buf2, &pbuf, 16); |
| if (h > UCHAR_MAX || (pbuf - buf2) < l) { |
| buf2[--l] = '\0'; |
| break; |
| } |
| prmt_ptr++; |
| } |
| c = (char)strtoul(buf2, NULL, 16); |
| if (c == 0) |
| c = '?'; |
| pbuf = cbuf; |
| break; |
| } |
| case '[': case ']': |
| if (c == flg_not_length) { |
| flg_not_length = (flg_not_length == '[' ? ']' : '['); |
| continue; |
| } |
| break; |
| } /* switch */ |
| } /* if */ |
| } /* if */ |
| cbuf[0] = 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); |
| free(free_me); |
| } /* while */ |
| |
| if (cwd_buf != (char *)bb_msg_unknown) |
| free(cwd_buf); |
| cmdedit_prompt = prmt_mem_ptr; |
| put_prompt(); |
| } |
| #endif |
| |
| 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) |
| { |
| unsigned 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 */ |
| } |
| |
| static int lineedit_read_key(char *read_key_buffer) |
| { |
| int64_t ic; |
| struct pollfd pfd; |
| |
| pfd.fd = STDIN_FILENO; |
| pfd.events = POLLIN; |
| do { |
| poll_again: |
| if (read_key_buffer[0] == 0) { |
| /* Wait for input. Can't just call read_key, |
| * it returns at once if stdin |
| * is in non-blocking mode. */ |
| safe_poll(&pfd, 1, -1); |
| } |
| /* Note: read_key sets errno to 0 on success: */ |
| ic = read_key(STDIN_FILENO, read_key_buffer); |
| if (ENABLE_FEATURE_EDITING_ASK_TERMINAL |
| && (int32_t)ic == KEYCODE_CURSOR_POS |
| ) { |
| int col = ((ic >> 32) & 0x7fff) - 1; |
| if (col > cmdedit_prmt_len) { |
| cmdedit_x += (col - cmdedit_prmt_len); |
| while (cmdedit_x >= cmdedit_termw) { |
| cmdedit_x -= cmdedit_termw; |
| cmdedit_y++; |
| } |
| } |
| goto poll_again; |
| } |
| } while (errno == EAGAIN); |
| return ic; |
| } |
| |
| /* |
| * 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 VI_CMDMODE_BIT 0x100 |
| |
| /* leave out the "vi-mode"-only case labels if vi editing isn't |
| * configured. */ |
| #define vi_case(caselabel) IF_FEATURE_EDITING(case caselabel) |
| |
| /* convert uppercase ascii to equivalent control char, for readability */ |
| #undef CTRL |
| #define CTRL(a) ((a) & ~0x40) |
| |
| /* Returns: |
| * -1 on read errors or EOF, or on bare Ctrl-D, |
| * 0 on ctrl-C (the line entered is still returned in 'command'), |
| * >0 length of input string, including terminating '\n' |
| */ |
| int FAST_FUNC read_line_input(const char *prompt, char *command, int maxsize, line_input_t *st) |
| { |
| int len; |
| #if ENABLE_FEATURE_TAB_COMPLETION |
| smallint lastWasTab = FALSE; |
| #endif |
| int ic; |
| smallint break_out = 0; |
| #if ENABLE_FEATURE_EDITING_VI |
| smallint vi_cmdmode = 0; |
| #endif |
| struct termios initial_settings; |
| struct termios new_settings; |
| char read_key_buffer[KEYCODE_BUFFER_SIZE]; |
| |
| INIT_S(); |
| |
| if (tcgetattr(STDIN_FILENO, &initial_settings) < 0 |
| || !(initial_settings.c_lflag & ECHO) |
| ) { |
| /* Happens when e.g. stty -echo was run before */ |
| parse_and_put_prompt(prompt); |
| fflush(stdout); |
| if (fgets(command, maxsize, stdin) == NULL) |
| len = -1; /* EOF or error */ |
| else |
| len = strlen(command); |
| DEINIT_S(); |
| return len; |
| } |
| |
| // FIXME: audit & improve this |
| if (maxsize > MAX_LINELEN) |
| maxsize = MAX_LINELEN; |
| |
| /* With null flags, no other fields are ever used */ |
| state = st ? st : (line_input_t*) &const_int_0; |
| #if ENABLE_FEATURE_EDITING_SAVEHISTORY |
| if ((state->flags & SAVE_HISTORY) && state->hist_file) |
| if (state->cnt_history == 0) |
| load_history(state); |
| #endif |
| if (state->flags & DO_HISTORY) |
| state->cur_history = state->cnt_history; |
| |
| /* prepare before init handlers */ |
| cmdedit_y = 0; /* quasireal y, not true if line > xt*yt */ |
| command_len = 0; |
| command_ps = command; |
| command[0] = '\0'; |
| |
| new_settings = initial_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; |
| tcsetattr_stdin_TCSANOW(&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 0 |
| for (ic = 0; ic <= MAX_HISTORY; ic++) |
| bb_error_msg("history[%d]:'%s'", ic, state->history[ic]); |
| bb_error_msg("cur_history:%d cnt_history:%d", state->cur_history, state->cnt_history); |
| #endif |
| |
| /* Print out the command prompt */ |
| parse_and_put_prompt(prompt); |
| |
| read_key_buffer[0] = 0; |
| while (1) { |
| fflush(NULL); |
| ic = lineedit_read_key(read_key_buffer); |
| |
| #if ENABLE_FEATURE_EDITING_VI |
| newdelflag = 1; |
| if (vi_cmdmode) { |
| /* btw, since KEYCODE_xxx are all < 0, this doesn't |
| * change ic if it contains one of them: */ |
| ic |= VI_CMDMODE_BIT; |
| } |
| #endif |
| |
| switch (ic) { |
| case '\n': |
| case '\r': |
| vi_case('\n'|VI_CMDMODE_BIT:) |
| vi_case('\r'|VI_CMDMODE_BIT:) |
| /* Enter */ |
| goto_new_line(); |
| break_out = 1; |
| break; |
| case CTRL('A'): |
| vi_case('0'|VI_CMDMODE_BIT:) |
| /* Control-a -- Beginning of line */ |
| input_backward(cursor); |
| break; |
| case CTRL('B'): |
| vi_case('h'|VI_CMDMODE_BIT:) |
| vi_case('\b'|VI_CMDMODE_BIT:) |
| vi_case('\x7f'|VI_CMDMODE_BIT:) /* DEL */ |
| /* Control-b -- Move back one character */ |
| input_backward(1); |
| break; |
| case CTRL('C'): |
| vi_case(CTRL('C')|VI_CMDMODE_BIT:) |
| /* 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; |
| #if ENABLE_FEATURE_EDITING_VI |
| prepare_to_die: |
| #endif |
| /* to control stopped jobs */ |
| break_out = command_len = -1; |
| break; |
| } |
| input_delete(0); |
| break; |
| case CTRL('E'): |
| vi_case('$'|VI_CMDMODE_BIT:) |
| /* Control-e -- End of line */ |
| input_end(); |
| break; |
| case CTRL('F'): |
| vi_case('l'|VI_CMDMODE_BIT:) |
| vi_case(' '|VI_CMDMODE_BIT:) |
| /* Control-f -- Move forward one character */ |
| input_forward(); |
| break; |
| case '\b': |
| case '\x7f': /* DEL */ |
| /* Control-h and DEL */ |
| input_backspace(); |
| break; |
| #if ENABLE_FEATURE_TAB_COMPLETION |
| case '\t': |
| input_tab(&lastWasTab); |
| break; |
| #endif |
| 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')|VI_CMDMODE_BIT:) |
| /* Control-l -- clear screen */ |
| printf("\033[H"); |
| redraw(0, command_len - cursor); |
| break; |
| #if MAX_HISTORY > 0 |
| case CTRL('N'): |
| vi_case(CTRL('N')|VI_CMDMODE_BIT:) |
| vi_case('j'|VI_CMDMODE_BIT:) |
| /* Control-n -- Get next command in history */ |
| if (get_next_history()) |
| goto rewrite_line; |
| break; |
| case CTRL('P'): |
| vi_case(CTRL('P')|VI_CMDMODE_BIT:) |
| vi_case('k'|VI_CMDMODE_BIT:) |
| /* Control-p -- Get previous command from history */ |
| if (get_previous_history()) |
| goto rewrite_line; |
| break; |
| #endif |
| case CTRL('U'): |
| vi_case(CTRL('U')|VI_CMDMODE_BIT:) |
| /* Control-U -- Clear line before cursor */ |
| if (cursor) { |
| overlapping_strcpy(command, command + cursor); |
| command_len -= cursor; |
| redraw(cmdedit_y, command_len); |
| } |
| break; |
| case CTRL('W'): |
| vi_case(CTRL('W')|VI_CMDMODE_BIT:) |
| /* 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'|VI_CMDMODE_BIT: |
| vi_cmdmode = 0; |
| break; |
| case 'I'|VI_CMDMODE_BIT: |
| input_backward(cursor); |
| vi_cmdmode = 0; |
| break; |
| case 'a'|VI_CMDMODE_BIT: |
| input_forward(); |
| vi_cmdmode = 0; |
| break; |
| case 'A'|VI_CMDMODE_BIT: |
| input_end(); |
| vi_cmdmode = 0; |
| break; |
| case 'x'|VI_CMDMODE_BIT: |
| input_delete(1); |
| break; |
| case 'X'|VI_CMDMODE_BIT: |
| if (cursor > 0) { |
| input_backward(1); |
| input_delete(1); |
| } |
| break; |
| case 'W'|VI_CMDMODE_BIT: |
| vi_Word_motion(command, 1); |
| break; |
| case 'w'|VI_CMDMODE_BIT: |
| vi_word_motion(command, 1); |
| break; |
| case 'E'|VI_CMDMODE_BIT: |
| vi_End_motion(command); |
| break; |
| case 'e'|VI_CMDMODE_BIT: |
| vi_end_motion(command); |
| break; |
| case 'B'|VI_CMDMODE_BIT: |
| vi_Back_motion(command); |
| break; |
| case 'b'|VI_CMDMODE_BIT: |
| vi_back_motion(command); |
| break; |
| case 'C'|VI_CMDMODE_BIT: |
| vi_cmdmode = 0; |
| /* fall through */ |
| case 'D'|VI_CMDMODE_BIT: |
| goto clear_to_eol; |
| |
| case 'c'|VI_CMDMODE_BIT: |
| vi_cmdmode = 0; |
| /* fall through */ |
| case 'd'|VI_CMDMODE_BIT: { |
| int nc, sc; |
| int prev_ic; |
| |
| sc = cursor; |
| prev_ic = ic; |
| |
| ic = lineedit_read_key(read_key_buffer); |
| if (errno) /* error */ |
| goto prepare_to_die; |
| |
| if ((ic | VI_CMDMODE_BIT) == prev_ic) { |
| /* "cc", "dd" */ |
| input_backward(cursor); |
| goto clear_to_eol; |
| break; |
| } |
| switch (ic) { |
| case 'w': |
| case 'W': |
| case 'e': |
| case 'E': |
| switch (ic) { |
| 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 (ic == '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'|VI_CMDMODE_BIT: |
| input_forward(); |
| /* fallthrough */ |
| case 'P'|VI_CMDMODE_BIT: |
| put(); |
| break; |
| case 'r'|VI_CMDMODE_BIT: |
| ic = lineedit_read_key(read_key_buffer); |
| if (errno) /* error */ |
| goto prepare_to_die; |
| if (ic < ' ' || ic > 255) { |
| beep(); |
| } else { |
| command[cursor] = ic; |
| bb_putchar(ic); |
| bb_putchar('\b'); |
| } |
| break; |
| case '\x1b': /* ESC */ |
| if (state->flags & VI_MODE) { |
| /* insert mode --> command mode */ |
| vi_cmdmode = 1; |
| input_backward(1); |
| } |
| break; |
| #endif /* FEATURE_COMMAND_EDITING_VI */ |
| |
| #if MAX_HISTORY > 0 |
| case KEYCODE_UP: |
| if (get_previous_history()) |
| goto rewrite_line; |
| beep(); |
| break; |
| case KEYCODE_DOWN: |
| 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 KEYCODE_RIGHT: |
| input_forward(); |
| break; |
| case KEYCODE_LEFT: |
| input_backward(1); |
| break; |
| case KEYCODE_DELETE: |
| input_delete(0); |
| break; |
| case KEYCODE_HOME: |
| input_backward(cursor); |
| break; |
| case KEYCODE_END: |
| input_end(); |
| break; |
| |
| default: |
| // /* Control-V -- force insert of next char */ |
| // if (c == CTRL('V')) { |
| // if (safe_read(STDIN_FILENO, &c, 1) < 1) |
| // goto prepare_to_die; |
| // if (c == 0) { |
| // beep(); |
| // break; |
| // } |
| // } |
| if (ic < ' ' || ic > 255) { |
| /* If VI_CMDMODE_BIT is set, ic is >= 256 |
| * and command mode ignores unexpected chars. |
| * Otherwise, we are here if ic is a |
| * control char or an unhandled ESC sequence, |
| * which is also ignored. |
| */ |
| break; |
| } |
| if ((int)command_len >= (maxsize - 2)) { |
| /* Not enough space for the char and EOL */ |
| break; |
| } |
| |
| command_len++; |
| if (cursor == (command_len - 1)) { |
| /* We are at the end, append */ |
| command[cursor] = ic; |
| command[cursor + 1] = '\0'; |
| cmdedit_set_out_char(' '); |
| } else { |
| /* In the middle, insert */ |
| int sc = cursor; |
| |
| memmove(command + sc + 1, command + sc, command_len - sc); |
| command[sc] = ic; |
| sc++; |
| /* rewrite from cursor */ |
| input_end(); |
| /* to prev x pos + 1 */ |
| input_backward(cursor - sc); |
| } |
| break; |
| } /* switch (input_key) */ |
| |
| if (break_out) |
| break; |
| |
| #if ENABLE_FEATURE_TAB_COMPLETION |
| ic &= ~VI_CMDMODE_BIT; |
| if (ic != '\t') |
| lastWasTab = FALSE; |
| #endif |
| } /* while (1) */ |
| |
| if (command_len > 0) |
| remember_in_history(command); |
| |
| if (break_out > 0) { |
| command[command_len++] = '\n'; |
| command[command_len] = '\0'; |
| } |
| |
| #if ENABLE_FEATURE_TAB_COMPLETION |
| free_tab_completion_data(); |
| #endif |
| |
| /* restore initial_settings */ |
| tcsetattr_stdin_TCSANOW(&initial_settings); |
| /* restore SIGWINCH handler */ |
| signal(SIGWINCH, previous_SIGWINCH_handler); |
| fflush(stdout); |
| |
| len = command_len; |
| DEINIT_S(); |
| |
| return len; /* can't return command_len, DEINIT_S() destroys it */ |
| } |
| |
| #else |
| |
| #undef read_line_input |
| int FAST_FUNC 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[MAX_LINELEN]; |
| 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 */ |