svn commit: trunk/busybox/shell
vda at busybox.net
vda at busybox.net
Sun Jan 21 19:19:46 UTC 2007
Author: vda
Date: 2007-01-21 11:19:46 -0800 (Sun, 21 Jan 2007)
New Revision: 17439
Log:
cmdedit: more optimizations
Modified:
trunk/busybox/shell/cmdedit.c
Changeset:
Modified: trunk/busybox/shell/cmdedit.c
===================================================================
--- trunk/busybox/shell/cmdedit.c 2007-01-21 19:18:59 UTC (rev 17438)
+++ trunk/busybox/shell/cmdedit.c 2007-01-21 19:19:46 UTC (rev 17439)
@@ -119,14 +119,6 @@
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 *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 @@
}
}
-
/* Move forward one character */
static void input_forward(void)
{
@@ -347,11 +334,22 @@
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)
{
int nm = num_matches;
@@ -363,7 +361,6 @@
}
#if ENABLE_FEATURE_COMMAND_USERNAME_COMPLETION
-
static void username_tab_completion(char *ud, char *with_shash_flg)
{
struct passwd *entry;
@@ -504,7 +501,6 @@
}
for (i = 0; i < npaths; i++) {
-
dir = opendir(paths[i]);
if (!dir) /* Don't print an error */
continue;
@@ -559,7 +555,6 @@
}
}
-
#define QUOT (UCHAR_MAX+1)
#define collapse_pos(is, in) { \
@@ -580,8 +575,8 @@
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 @@
}
/*
- 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 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 @@
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 @@
/* 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 @@
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 @@
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 @@
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 @@
}
}
}
+
#endif /* FEATURE_COMMAND_TAB_COMPLETION */
@@ -927,7 +913,7 @@
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 @@
* 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 @@
}
break;
case '$':
- c = (my_euid == 0 ? '#' : '$');
+ c = (geteuid() == 0 ? '#' : '$');
break;
#if ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR
case 'w':
@@ -1283,7 +1194,8 @@
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 @@
}
#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 @@
#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 @@
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 @@
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 @@
}
#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;
}
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