diff options
Diffstat (limited to 'shell/cmdedit.c')
| -rw-r--r-- | shell/cmdedit.c | 246 |
1 files changed, 109 insertions, 137 deletions
diff --git a/shell/cmdedit.c b/shell/cmdedit.c index 1143ded..39cab19 100644 --- a/shell/cmdedit.c +++ b/shell/cmdedit.c @@ -119,14 +119,6 @@ static struct termios initial_settings, new_settings; static volatile unsigned cmdedit_termw = 80; /* actual terminal width */ -static -volatile int handlers_sets = 0; /* Set next bits: */ -enum { - SET_ATEXIT = 1, /* when atexit() has been called - and get euid,uid,gid to fast compare */ - SET_WCHG_HANDLERS = 2, /* winchg signal handler */ - SET_RESET_TERM = 4, /* if the terminal needs to be reset upon exit */ -}; static int cmdedit_x; /* real x terminal position */ @@ -148,10 +140,6 @@ static char *user_buf = ""; static char *home_pwd_buf = ""; #endif -#if ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR || ENABLE_FEATURE_COMMAND_TAB_COMPLETION -static int my_euid; -#endif - #if ENABLE_FEATURE_COMMAND_TAB_COMPLETION static int my_uid; static int my_gid; @@ -339,7 +327,6 @@ static void input_backspace(void) } } - /* Move forward one character */ static void input_forward(void) { @@ -347,10 +334,21 @@ static void input_forward(void) cmdedit_set_out_char(command_ps[cursor + 1]); } + #if ENABLE_FEATURE_COMMAND_TAB_COMPLETION static char **matches; -static int num_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) { @@ -363,7 +361,6 @@ static void add_match(char *matched) } #if ENABLE_FEATURE_COMMAND_USERNAME_COMPLETION - static void username_tab_completion(char *ud, char *with_shash_flg) { struct passwd *entry; @@ -504,7 +501,6 @@ static void exe_n_cwd_tab_completion(char *command, int type) } for (i = 0; i < npaths; i++) { - dir = opendir(paths[i]); if (!dir) /* Don't print an error */ continue; @@ -559,7 +555,6 @@ static void exe_n_cwd_tab_completion(char *command, int type) } } - #define QUOT (UCHAR_MAX+1) #define collapse_pos(is, in) { \ @@ -580,8 +575,8 @@ static int find_match(char *matchBuf, int *len_with_quotes) if (int_buf[i] == 0) { pos_buf[i] = -1; /* indicator end line */ break; - } else - pos_buf[i] = i; + } + pos_buf[i] = i; } /* mask \+symbol and convert '\t' to ' ' */ @@ -731,9 +726,9 @@ static int find_match(char *matchBuf, int *len_with_quotes) } /* - display by column original ideas from ls applet, - very optimize by my :) -*/ + * display by column (original idea from ls applet, + * very optimized by me :) + */ static void showfiles(void) { int ncols, row; @@ -770,11 +765,6 @@ static void showfiles(void) } } -static int match_compare(const void *a, const void *b) -{ - return strcmp(*(char**)a, *(char**)b); -} - static char *add_quote_for_spec_chars(char *found) { int l = 0; @@ -789,18 +779,14 @@ static char *add_quote_for_spec_chars(char *found) 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) { - /* Do TAB completion */ - if (lastWasTab == 0) { /* free all memory */ - if (matches) { - while (num_matches > 0) - free(matches[--num_matches]); - free(matches); - matches = (char **) NULL; - } - return; - } if (!*lastWasTab) { char *tmp, *tmp1; int len_found; @@ -813,12 +799,12 @@ static void input_tab(int *lastWasTab) /* Make a local copy of the string -- up * to the position of the cursor */ tmp = strncpy(matchBuf, command_ps, cursor); - tmp[cursor] = 0; + tmp[cursor] = '\0'; find_type = find_match(matchBuf, &recalc_pos); /* Free up any memory already allocated */ - input_tab(0); + free_tab_completion_data(); #if ENABLE_FEATURE_COMMAND_USERNAME_COMPLETION /* If the word starts with `~' and there is no slash in the word, @@ -829,24 +815,24 @@ static void input_tab(int *lastWasTab) if (!matches) #endif /* Try to match any executable in our path and everything - * in the current working directory that matches. */ + * in the current working directory */ 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]) { + if (matches[i] && matches[i+1]) { /* paranoia */ if (strcmp(matches[i], matches[i+1]) == 0) { free(matches[i]); - matches[i] = 0; + matches[i] = NULL; /* paranoia */ } else { matches[n++] = matches[i]; } } } - matches[n++] = matches[num_matches-1]; - num_matches = n; + matches[n] = matches[i]; + num_matches = n + 1; } /* Did we find exactly one match? */ if (!matches || num_matches > 1) { @@ -858,10 +844,10 @@ static void input_tab(int *lastWasTab) for (tmp = tmp1; *tmp; tmp++) for (len_found = 1; len_found < num_matches; len_found++) if (matches[len_found][(tmp - tmp1)] != *tmp) { - *tmp = 0; + *tmp = '\0'; break; } - if (*tmp1 == 0) { /* have unique */ + if (*tmp1 == '\0') { /* have unique */ free(tmp1); return; } @@ -881,7 +867,6 @@ static void input_tab(int *lastWasTab) len_found = strlen(tmp); /* have space to placed match? */ if ((len_found - strlen(matchBuf) + len) < BUFSIZ) { - /* before word for match */ command_ps[cursor - recalc_pos] = 0; /* save tail line */ @@ -914,6 +899,7 @@ static void input_tab(int *lastWasTab) } } } + #endif /* FEATURE_COMMAND_TAB_COMPLETION */ @@ -927,7 +913,7 @@ static int cur_history; static void get_previous_history(void) { - if (command_ps[0] != 0 || history[cur_history] == 0) { + if (command_ps[0] != '\0' || history[cur_history] == NULL) { free(history[cur_history]); history[cur_history] = xstrdup(command_ps); } @@ -1126,81 +1112,6 @@ enum { vi_mode = 0 }; * cmdedit_read_input and its helpers */ -#define setTermSettings(fd, argp) tcsetattr(fd, TCSANOW, argp) -#define getTermSettings(fd, argp) tcgetattr(fd, argp); - -static sighandler_t previous_SIGWINCH_handler; - -static void cmdedit_reset_term(void) -{ - if (handlers_sets & SET_RESET_TERM) { - setTermSettings(STDIN_FILENO, (void *) &initial_settings); - handlers_sets &= ~SET_RESET_TERM; - } - if (handlers_sets & SET_WCHG_HANDLERS) { - /* restore SIGWINCH handler */ - signal(SIGWINCH, previous_SIGWINCH_handler); - handlers_sets &= ~SET_WCHG_HANDLERS; - } - fflush(stdout); -} - -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), 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 */ -} - -static void cmdedit_init(void) -{ - cmdedit_prmt_len = 0; - if (!(handlers_sets & SET_WCHG_HANDLERS)) { - previous_SIGWINCH_handler = signal(SIGWINCH, win_changed); - win_changed(0); /* do initial resizing */ - handlers_sets |= SET_WCHG_HANDLERS; - } - - if (!(handlers_sets & SET_ATEXIT)) { -#if ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR - struct passwd *entry; - - my_euid = geteuid(); - entry = getpwuid(my_euid); - if (entry) { - user_buf = xstrdup(entry->pw_name); - home_pwd_buf = xstrdup(entry->pw_dir); - } -#endif - -#if ENABLE_FEATURE_COMMAND_TAB_COMPLETION - -#if !ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR - my_euid = geteuid(); -#endif - my_uid = getuid(); - my_gid = getgid(); -#endif /* FEATURE_COMMAND_TAB_COMPLETION */ - handlers_sets |= SET_ATEXIT; -// Crap. We should be able to do it without atexit. - atexit(cmdedit_reset_term); /* be sure to do this only once */ - } -} - #if !ENABLE_FEATURE_SH_FANCY_PROMPT static void parse_prompt(const char *prmt_ptr) { @@ -1259,7 +1170,7 @@ static void parse_prompt(const char *prmt_ptr) } break; case '$': - c = (my_euid == 0 ? '#' : '$'); + c = (geteuid() == 0 ? '#' : '$'); break; #if ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR case 'w': @@ -1283,7 +1194,8 @@ static void parse_prompt(const char *prmt_ptr) pbuf += (cp-pbuf) + 1; break; case '!': - snprintf(pbuf = buf2, sizeof(buf2), "%d", num_ok_lines); + pbuf = buf2; + snprintf(buf2, sizeof(buf2), "%d", num_ok_lines); break; case 'e': case 'E': /* \e \E = \033 */ c = '\033'; @@ -1330,11 +1242,71 @@ static void parse_prompt(const char *prmt_ptr) } #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_reset_term(void) +{ + setTermSettings(STDIN_FILENO, (void *) &initial_settings); + /* restore SIGWINCH handler */ + signal(SIGWINCH, previous_SIGWINCH_handler); + fflush(stdout); +} + +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), 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 */ +} + +static void cmdedit_init(void) +{ + cmdedit_prmt_len = 0; + 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_COMMAND_TAB_COMPLETION + my_uid = getuid(); + my_gid = getgid(); +#endif +// Crap. We should be able to do it without atexit. + atexit(cmdedit_reset_term); /* be sure to do this only once */ +} + /* - * the emacs and vi modes share much of the code in the big - * command loop. commands entered when in vi's command mode (aka + * 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 + * this keeps them from being self-inserted. This clutters the * big switch a bit, but keeps all the code in one place. */ @@ -1379,7 +1351,6 @@ int cmdedit_read_input(char *prompt, char command[BUFSIZ]) #endif new_settings.c_cc[VINTR] = _POSIX_VDISABLE; setTermSettings(0, (void *) &new_settings); - handlers_sets |= SET_RESET_TERM; /* Now initialize things */ cmdedit_init(); @@ -1387,11 +1358,12 @@ int cmdedit_read_input(char *prompt, char command[BUFSIZ]) parse_prompt(prompt); while (1) { - fflush(stdout); /* buffered out to fast */ + fflush(stdout); - if (safe_read(0, &c, 1) < 1) + if (safe_read(0, &c, 1) < 1) { /* if we can't read input then exit */ goto prepare_to_die; + } ic = c; @@ -1789,23 +1761,22 @@ int cmdedit_read_input(char *prompt, char command[BUFSIZ]) lastWasTab = FALSE; } - setTermSettings(0, (void *) &initial_settings); - handlers_sets &= ~SET_RESET_TERM; - #if MAX_HISTORY > 0 /* Handle command history log */ /* cleanup may be saved current command line */ - if (len > 0) { /* no put empty line */ + if (len > 0) { int i = n_history; free(history[MAX_HISTORY]); - history[MAX_HISTORY] = 0; + history[MAX_HISTORY] = NULL; /* After max history, remove the oldest command */ if (i >= MAX_HISTORY) { free(history[0]); for (i = 0; i < MAX_HISTORY-1; i++) history[i] = history[i+1]; } +// Maybe "if (!i || strcmp(history[i-1], command) != 0) ..." +// (i.e. do not save dups?) history[i++] = xstrdup(command); cur_history = i; n_history = i; @@ -1822,12 +1793,13 @@ int cmdedit_read_input(char *prompt, char command[BUFSIZ]) } #if ENABLE_FEATURE_CLEAN_UP && ENABLE_FEATURE_COMMAND_TAB_COMPLETION - input_tab(0); + free_tab_completion_data(); #endif #if ENABLE_FEATURE_SH_FANCY_PROMPT free(cmdedit_prompt); #endif + /* restore initial_settings and SIGWINCH handler */ cmdedit_reset_term(); return len; } |