diff options
Diffstat (limited to 'shell')
| -rw-r--r-- | shell/Config.in | 8 | ||||
| -rw-r--r-- | shell/ash.c | 17 | ||||
| -rw-r--r-- | shell/cmdedit.c | 393 | ||||
| -rw-r--r-- | shell/cmdedit.h | 4 |
4 files changed, 388 insertions, 34 deletions
diff --git a/shell/Config.in b/shell/Config.in index 1a3c388a4..0d39e5bae 100644 --- a/shell/Config.in +++ b/shell/Config.in @@ -201,6 +201,14 @@ config CONFIG_FEATURE_COMMAND_EDITING help Enable command editing in shell. +config CONFIG_FEATURE_COMMAND_EDITING_VI + bool "vi-style line editing commands" + default n + depends on CONFIG_FEATURE_COMMAND_EDITING + help + Enable vi-style line editing in the shell. This mode can be + turned on and off with "set -o vi" and "set +o vi". + config CONFIG_FEATURE_COMMAND_HISTORY int "history size" default 15 diff --git a/shell/ash.c b/shell/ash.c index 783204933..7f77594a7 100644 --- a/shell/ash.c +++ b/shell/ash.c @@ -1949,19 +1949,21 @@ struct shparam { #define bflag optlist[11] #define uflag optlist[12] #define qflag optlist[13] +#define viflag optlist[14] #ifdef DEBUG -#define nolog optlist[14] -#define debug optlist[15] -#define NOPTS 16 -#else -#define NOPTS 14 +#define nolog optlist[15] +#define debug optlist[16] +#endif + +#ifndef CONFIG_FEATURE_COMMAND_EDITING_VI +#define setvimode(on) viflag = 0 /* forcibly keep the option off */ #endif /* $NetBSD: options.c,v 1.33 2003/01/22 20:36:04 dsl Exp $ */ -static const char *const optletters_optnames[NOPTS] = { +static const char *const optletters_optnames[] = { "e" "errexit", "f" "noglob", "I" "ignoreeof", @@ -1976,6 +1978,7 @@ static const char *const optletters_optnames[NOPTS] = { "b" "notify", "u" "nounset", "q" "quietprofile", + "\0" "vi", #ifdef DEBUG "\0" "nolog", "\0" "debug", @@ -1985,6 +1988,7 @@ static const char *const optletters_optnames[NOPTS] = { #define optletters(n) optletters_optnames[(n)][0] #define optnames(n) (&optletters_optnames[(n)][1]) +#define NOPTS (sizeof(optletters_optnames)/sizeof(optletters_optnames[0])) static char optlist[NOPTS]; @@ -8862,6 +8866,7 @@ optschanged(void) #endif setinteractive(iflag); setjobctl(mflag); + setvimode(viflag); } static inline void diff --git a/shell/cmdedit.c b/shell/cmdedit.c index 3380dffe9..c67283f4a 100644 --- a/shell/cmdedit.c +++ b/shell/cmdedit.c @@ -441,27 +441,61 @@ static void redraw(int y, int back_cursor) input_backward(back_cursor); } -/* Delete the char in front of the cursor */ -static void input_delete(void) +#ifdef CONFIG_FEATURE_COMMAND_EDITING_VI +static char delbuf[BUFSIZ]; /* a place to store deleted characters */ +static char *delp = delbuf; +static int 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 == len) return; +#ifdef CONFIG_FEATURE_COMMAND_EDITING_VI + if (save) { + if (newdelflag) { + delp = delbuf; + newdelflag = 0; + } + if (delp - delbuf < BUFSIZ) + *delp++ = command_ps[j]; + } +#endif + strcpy(command_ps + j, command_ps + j + 1); len--; - input_end(); /* rewtite new line */ + input_end(); /* rewrite new line */ cmdedit_set_out_char(0); /* destroy end char */ input_backward(cursor - j); /* back to old pos cursor */ } +#ifdef CONFIG_FEATURE_COMMAND_EDITING_VI +static void put(void) +{ + int ocursor, j = delp - delbuf; + if (j == 0) + return; + ocursor = cursor; + /* open hole and then fill it */ + memmove(command_ps + cursor + j, command_ps + cursor, len - cursor + 1); + strncpy(command_ps + cursor, delbuf, j); + 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(); + input_delete(0); } } @@ -473,7 +507,6 @@ static void input_forward(void) cmdedit_set_out_char(command_ps[cursor + 1]); } - static void cmdedit_setwidth(int w, int redraw_flg) { cmdedit_termw = cmdedit_prmt_len + 2; @@ -1217,18 +1250,147 @@ enum { * ESC-h -- Delete forward one word * CTL-t -- Transpose two characters * - * Furthermore, the "vi" command editing keys are not implemented. + * Minimalist vi-style command line editing available if configured. + * vi mode implemented 2005 by Paul Fox <pgf@foxharp.boston.ma.us> * */ +#ifdef CONFIG_FEATURE_COMMAND_EDITING_VI +static int vi_mode; + +void setvimode ( int viflag ) +{ + vi_mode = viflag; +} + +void +vi_Word_motion(char *command, int eat) +{ + while (cursor < len && !isspace(command[cursor])) + input_forward(); + if (eat) while (cursor < len && isspace(command[cursor])) + input_forward(); +} + +void +vi_word_motion(char *command, int eat) +{ + if (isalnum(command[cursor]) || command[cursor] == '_') { + while (cursor < len && + (isalnum(command[cursor+1]) || + command[cursor+1] == '_')) + input_forward(); + } else if (ispunct(command[cursor])) { + while (cursor < len && + (ispunct(command[cursor+1]))) + input_forward(); + } + + if (cursor < len) + input_forward(); + + if (eat && cursor < len && isspace(command[cursor])) + while (cursor < len && isspace(command[cursor])) + input_forward(); +} + +void +vi_End_motion(char *command) +{ + input_forward(); + while (cursor < len && isspace(command[cursor])) + input_forward(); + while (cursor < len-1 && !isspace(command[cursor+1])) + input_forward(); +} + +void +vi_end_motion(char *command) +{ + if (cursor >= len-1) + return; + input_forward(); + while (cursor < len-1 && isspace(command[cursor])) + input_forward(); + if (cursor >= len-1) + return; + if (isalnum(command[cursor]) || command[cursor] == '_') { + while (cursor < len-1 && + (isalnum(command[cursor+1]) || + command[cursor+1] == '_')) + input_forward(); + } else if (ispunct(command[cursor])) { + while (cursor < len-1 && + (ispunct(command[cursor+1]))) + input_forward(); + } +} + +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); +} + +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 + +/* + * the normal emacs mode and vi's insert mode are the same. + * commands entered when in vi command mode ("escape mode") get + * an extra bit added to distinguish them. this lets them share + * much of the code in the big switch and while loop. i + * experimented with an ugly macro to make the case labels for + * these cases go away entirely when vi mode isn't configured, in + * hopes of letting the jump tables get smaller: + * #define vcase(caselabel) caselabel + * and then + * case CNTRL('A'): + * case vcase(VICMD('0'):) + * but it didn't seem to make any difference in code size, + * and the macro-ized code was too ugly. + */ + +#define VI_cmdbit 0x100 +#define VICMD(somecmd) ((somecmd)|VI_cmdbit) + +/* convert uppercase ascii to equivalent control char, for readability */ +#define CNTRL(uc_char) ((uc_char) - 0x40) + int cmdedit_read_input(char *prompt, char command[BUFSIZ]) { int break_out = 0; int lastWasTab = FALSE; - unsigned char c = 0; - + unsigned char c; +#ifdef CONFIG_FEATURE_COMMAND_EDITING_VI + unsigned int ic, prevc; + int vi_cmdmode = 0; +#endif /* prepare before init handlers */ cmdedit_y = 0; /* quasireal y, not true work if line > xt*yt */ len = 0; @@ -1265,22 +1427,38 @@ int cmdedit_read_input(char *prompt, char command[BUFSIZ]) /* if we can't read input then exit */ goto prepare_to_die; - switch (c) { +#ifdef CONFIG_FEATURE_COMMAND_EDITING_VI + newdelflag = 1; + ic = c; + if (vi_cmdmode) + ic |= VI_cmdbit; + switch (ic) +#else + switch (c) +#endif + { case '\n': case '\r': + case VICMD('\n'): + case VICMD('\r'): /* Enter */ goto_new_line(); break_out = 1; break; - case 1: + case CNTRL('A'): + case VICMD('0'): /* Control-a -- Beginning of line */ input_backward(cursor); break; - case 2: + case CNTRL('B'): + case VICMD('h'): + case VICMD('\b'): + case VICMD(DEL): /* Control-b -- Move back one character */ input_backward(1); break; - case 3: + case CNTRL('C'): + case VICMD(CNTRL('C')): /* Control-c -- stop gathering input */ goto_new_line(); #ifndef CONFIG_ASH @@ -1293,7 +1471,7 @@ int cmdedit_read_input(char *prompt, char command[BUFSIZ]) break_out = -1; /* to control traps */ #endif break; - case 4: + case CNTRL('D'): /* Control-d -- Delete one character, or exit * if the len=0 and no chars to delete */ if (len == 0) { @@ -1310,14 +1488,17 @@ prepare_to_die: break; #endif } else { - input_delete(); + input_delete(0); } break; - case 5: + case CNTRL('E'): + case VICMD('$'): /* Control-e -- End of line */ input_end(); break; - case 6: + case CNTRL('F'): + case VICMD('l'): + case VICMD(' '): /* Control-f -- Move forward one character */ input_forward(); break; @@ -1331,24 +1512,29 @@ prepare_to_die: input_tab(&lastWasTab); #endif break; - case 11: + case CNTRL('K'): /* Control-k -- clear to end of line */ *(command + cursor) = 0; len = cursor; printf("\033[J"); break; - case 12: + case CNTRL('L'): + case VICMD(CNTRL('L')): /* Control-l -- clear screen */ printf("\033[H"); redraw(0, len-cursor); break; #if MAX_HISTORY >= 1 - case 14: + case CNTRL('N'): + case VICMD(CNTRL('N')): + case VICMD('j'): /* Control-n -- Get next command in history */ if (get_next_history()) goto rewrite_line; break; - case 16: + case CNTRL('P'): + case VICMD(CNTRL('P')): + case VICMD('k'): /* Control-p -- Get previous command from history */ if (cur_history > 0) { get_previous_history(); @@ -1358,26 +1544,167 @@ prepare_to_die: } break; #endif - case 21: + case CNTRL('U'): + case VICMD(CNTRL('U')): /* Control-U -- Clear line before cursor */ if (cursor) { strcpy(command, command + cursor); redraw(cmdedit_y, len -= cursor); } break; - case 23: + case CNTRL('W'): + case VICMD(CNTRL('W')): /* 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 CONFIG_FEATURE_COMMAND_EDITING_VI + case VICMD('i'): + vi_cmdmode = 0; + break; + case VICMD('I'): + input_backward(cursor); + vi_cmdmode = 0; + break; + case VICMD('a'): + input_forward(); + vi_cmdmode = 0; + break; + case VICMD('A'): + input_end(); + vi_cmdmode = 0; + break; + case VICMD('x'): + input_delete(1); + break; + case VICMD('X'): + if (cursor > 0) { + input_backward(1); + input_delete(1); + } + break; + case VICMD('W'): + vi_Word_motion(command, 1); + break; + case VICMD('w'): + vi_word_motion(command, 1); + break; + case VICMD('E'): + vi_End_motion(command); + break; + case VICMD('e'): + vi_end_motion(command); + break; + case VICMD('B'): + vi_Back_motion(command); + break; + case VICMD('b'): + vi_back_motion(command); + break; + case VICMD('C'): + vi_cmdmode = 0; + /* fall through */ + case VICMD('D'): + goto clear_to_eol; + + case VICMD('c'): + vi_cmdmode = 0; + /* fall through */ + case VICMD('d'): + { + 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 < len) + input_delete(1); + break; + } + } + break; + case VICMD('p'): + input_forward(); + /* fallthrough */ + case VICMD('P'): + put(); + break; + case VICMD('r'): + 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 /* CONFIG_FEATURE_COMMAND_EDITING_VI */ case ESC:{ +#if CONFIG_FEATURE_COMMAND_EDITING_VI + if (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') { + case VICMD('['): + case VICMD('O'): if (safe_read(0, &c, 1) < 1) goto prepare_to_die; } @@ -1409,13 +1736,17 @@ prepare_to_die: case 'B': /* Down Arrow -- Get next command in history */ if (!get_next_history()) - break; + break; /* Rewrite the line with the selected history item */ rewrite_line: /* change command */ len = strlen(strcpy(command, history[cur_history])); - /* redraw and go to end line */ + /* redraw and go to eol (bol, in vi */ +#if CONFIG_FEATURE_COMMAND_EDITING_VI + redraw(cmdedit_y, vi_mode ? 9999:0); +#else redraw(cmdedit_y, 0); +#endif break; #endif case 'C': @@ -1428,7 +1759,7 @@ rewrite_line: break; case '3': /* Delete */ - input_delete(); + input_delete(0); break; case '1': case 'H': @@ -1450,7 +1781,7 @@ rewrite_line: default: /* If it's regular input, do the normal thing */ #ifdef CONFIG_FEATURE_NONPRINTABLE_INVERSE_PUT /* Control-V -- Add non-printable symbol */ - if (c == 22) { + if (c == CNTRL('V')) { if (safe_read(0, &c, 1) < 1) goto prepare_to_die; if (c == 0) { @@ -1459,8 +1790,14 @@ rewrite_line: } } else #endif - if (!Isprint(c)) /* Skip non-printable characters */ - break; + { +#if CONFIG_FEATURE_COMMAND_EDITING_VI + if (vi_cmdmode) /* don't self-insert */ + break; +#endif + if (!Isprint(c)) /* Skip non-printable characters */ + break; + } if (len >= (BUFSIZ - 2)) /* Need to leave space for enter */ break; diff --git a/shell/cmdedit.h b/shell/cmdedit.h index 4c0c09d76..f8482f4a7 100644 --- a/shell/cmdedit.h +++ b/shell/cmdedit.h @@ -12,4 +12,8 @@ void load_history ( const char *fromfile ); void save_history ( const char *tofile ); #endif +#if CONFIG_FEATURE_COMMAND_EDITING_VI +void setvimode ( int viflag ); +#endif + #endif /* CMDEDIT_H */ |