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Several fixes.

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-Erik
This commit is contained in:
Erik Andersen
2000-03-17 01:12:41 +00:00
parent 161220c498
commit 6273f655c8
15 changed files with 529 additions and 111 deletions
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260
cmdedit.c
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@@ -47,6 +47,8 @@
#define ESC 27
#define DEL 127
#define member(c, s) ((c) ? ((char *)strchr ((s), (c)) != (char *)NULL) : 0)
#define whitespace(c) (((c) == ' ') || ((c) == '\t'))
static struct history *his_front = NULL; /* First element in command line list */
static struct history *his_end = NULL; /* Last element in command line list */
@@ -104,7 +106,7 @@ void cmdedit_reset_term(void)
xioctl(fileno(stdin), TCSETA, (void *) &old_term);
}
void gotaSignal(int sig)
void prepareToDie(int sig)
{
cmdedit_reset_term();
fprintf(stdout, "\n");
@@ -175,6 +177,40 @@ void input_backspace(int outputFd, int *cursor, int *len)
}
}
char **username_completion_matches( char* matchBuf)
{
fprintf(stderr, "\nin username_completion_matches\n");
return ( (char**) NULL);
}
char **command_completion_matches( char* matchBuf)
{
fprintf(stderr, "\nin command_completion_matches\n");
return ( (char**) NULL);
}
char **directory_completion_matches( char* matchBuf)
{
fprintf(stderr, "\nin directory_completion_matches\n");
return ( (char**) NULL);
}
/*
* This function is used to grab a character buffer
* from the input file descriptor and allows you to
* a string with full command editing (sortof 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
*
* Furthermore, the "vi" command editing keys are not implemented.
*
* TODO: implement TAB command completion. :)
*
*/
extern int cmdedit_read_input(int inputFd, int outputFd,
char command[BUFSIZ])
{
@@ -185,6 +221,8 @@ extern int cmdedit_read_input(int inputFd, int outputFd,
int cursor = 0;
int break_out = 0;
int ret = 0;
int lastWasTab = FALSE;
char **matches = (char **)NULL;
char c = 0;
struct history *hp = his_end;
@@ -209,90 +247,233 @@ extern int cmdedit_read_input(int inputFd, int outputFd,
if ((ret = read(inputFd, &c, 1)) < 1)
return ret;
switch (c) {
case 1: /* Control-A Beginning of line */
case 1:
/* Control-a -- Beginning of line */
input_home(outputFd, &cursor);
break;
case 5: /* Control-E EOL */
case 5:
/* Control-e -- End of line */
input_end(outputFd, &cursor, len);
break;
case 4: /* Control-D */
case 2:
/* Control-b -- Move back one character */
if (cursor > 0) {
xwrite(outputFd, "\033[D", 3);
cursor--;
}
break;
case 6:
/* Control-f -- Move forward one character */
if (cursor < len) {
xwrite(outputFd, "\033[C", 3);
cursor++;
}
break;
case 4:
/* Control-d -- Delete one character */
if (cursor != len) {
input_delete(outputFd, cursor);
len--;
} else if (len == 0) {
prepareToDie(0);
exit(0);
}
break;
case '\b': /* Backspace */
case 14:
/* Control-n -- Get next command */
if (hp && hp->n && hp->n->s) {
free( hp->s);
hp->s = strdup(parsenextc);
hp = hp->n;
goto hop;
}
break;
case 16:
/* Control-p -- Get previous command */
if (hp && hp->p) {
free( hp->s);
hp->s = strdup(parsenextc);
hp = hp->p;
goto hop;
}
break;
case '\t':
{
/* Do TAB completion */
int in_command_position=0, ti=len-1;
if (lastWasTab == FALSE) {
char *tmp;
char *matchBuf;
if (matches) {
free(matches);
matches = (char **)NULL;
}
matchBuf = (char *) calloc(BUFSIZ, sizeof(char));
/* Make a local copy of the string -- up
* to the the position of the cursor */
strcpy( matchBuf, parsenextc);
matchBuf[cursor+1] = '\0';
/* skip leading white space */
tmp = matchBuf;
while (*tmp && isspace(*tmp)) {
(tmp)++;
ti++;
}
/* Determine if this is a command word or not */
//while ((ti > -1) && (whitespace (matchBuf[ti]))) {
//printf("\nti=%d\n", ti);
// ti--;
// }
printf("\nti=%d\n", ti);
if (ti < 0) {
in_command_position++;
} else if (member(matchBuf[ti], ";|&{(`")) {
int this_char, prev_char;
in_command_position++;
/* Handle the two character tokens `>&', `<&', and `>|'.
We are not in a command position after one of these. */
this_char = matchBuf[ti];
prev_char = matchBuf[ti - 1];
if ((this_char == '&' && (prev_char == '<' || prev_char == '>')) ||
(this_char == '|' && prev_char == '>')) {
in_command_position = 0;
}
/* For now, do not bother with catching quoted
* expressions and marking them as not in command
* positions. Some other day. Or not.
*/
//else if (char_is_quoted (matchBuf, ti)) {
// in_command_position = 0;
//}
}
printf("\nin_command_position=%d\n", in_command_position);
/* If the word starts in `~', and there is no slash in the word,
* then try completing this word as a username. */
if (*matchBuf == '~' && !strchr (matchBuf, '/'))
matches = username_completion_matches(matchBuf);
/* If this word is in a command position, then complete over possible
* command names, including aliases, built-ins, and executables. */
if (!matches && in_command_position) {
matches = command_completion_matches(matchBuf);
/* If we are attempting command completion and nothing matches,
* then try and match directories as a last resort... */
if (!matches)
matches = directory_completion_matches(matchBuf);
}
} else {
printf("\nprinting match list\n");
}
/* Rewrite the whole line (for debugging) */
for (; cursor > 0; cursor--)
xwrite(outputFd, "\b", 1);
len = strlen(parsenextc);
xwrite(outputFd, parsenextc, len);
cursor = len;
break;
}
case '\b':
case DEL:
/* Backspace */
input_backspace(outputFd, &cursor, &len);
break;
case '\n': /* Enter */
case '\n':
/* Enter */
*(parsenextc + len++ + 1) = c;
xwrite(outputFd, &c, 1);
break_out = 1;
break;
case ESC: /* escape sequence follows */
case ESC: {
/* escape sequence follows */
if ((ret = read(inputFd, &c, 1)) < 1)
return ret;
if (c == '[') { /* 91 */
if ((ret = read(inputFd, &c, 1)) < 1)
return ret;
switch (c) {
case 'A':
if (hp && hp->p) { /* Up */
/* Up Arrow -- Get previous command */
if (hp && hp->p) {
free( hp->s);
hp->s = strdup(parsenextc);
hp = hp->p;
goto hop;
}
break;
case 'B':
if (hp && hp->n && hp->n->s) { /* Down */
/* Down Arrow -- Get next command */
if (hp && hp->n && hp->n->s) {
free( hp->s);
hp->s = strdup(parsenextc);
hp = hp->n;
goto hop;
}
break;
hop: /* hop */
/* This is where we rewrite the line
* using the selected history item */
hop:
len = strlen(parsenextc);
for (; cursor > 0; cursor--) /* return to begining of line */
/* return to begining of line */
for (; cursor > 0; cursor--)
xwrite(outputFd, "\b", 1);
xwrite(outputFd, parsenextc, len);
for (j = 0; j < len; j++) /* erase old command */
/* erase old command */
for (j = 0; j < len; j++)
xwrite(outputFd, " ", 1);
for (j = len; j > 0; j--) /* return to begining of line */
/* return to begining of line */
for (j = len; j > 0; j--)
xwrite(outputFd, "\b", 1);
strcpy(parsenextc, hp->s); /* write new command */
memset(parsenextc, 0, BUFSIZ);
/* write new command */
strcpy(parsenextc, hp->s);
len = strlen(hp->s);
xwrite(outputFd, parsenextc, len);
cursor = len;
break;
case 'C': /* Right */
case 'C':
/* Right Arrow -- Move forward one character */
if (cursor < len) {
xwrite(outputFd, "\033[C", 3);
cursor++;
}
break;
case 'D': /* Left */
case 'D':
/* Left Arrow -- Move back one character */
if (cursor > 0) {
xwrite(outputFd, "\033[D", 3);
cursor--;
}
break;
case '3': /* Delete */
case '3':
/* Delete */
if (cursor != len) {
input_delete(outputFd, cursor);
len--;
}
break;
case '1': /* Home (Ctrl-A) */
case '1':
/* Home (Ctrl-A) */
input_home(outputFd, &cursor);
break;
case '4': /* End (Ctrl-E) */
case '4':
/* End (Ctrl-E) */
input_end(outputFd, &cursor, len);
break;
}
@@ -300,20 +481,24 @@ extern int cmdedit_read_input(int inputFd, int outputFd,
if ((ret = read(inputFd, &c, 1)) < 1)
return ret; /* read 126 (~) */
}
if (c == 'O') { /* 79 */
if (c == 'O') {
/* 79 */
if ((ret = read(inputFd, &c, 1)) < 1)
return ret;
switch (c) {
case 'H': /* Home (xterm) */
case 'H':
/* Home (xterm) */
input_home(outputFd, &cursor);
break;
case 'F': /* End (xterm) */
case 'F':
/* End (xterm) */
input_end(outputFd, &cursor, len);
break;
}
}
c = 0;
break;
}
default: /* If it's regular input, do the normal thing */
@@ -343,6 +528,10 @@ extern int cmdedit_read_input(int inputFd, int outputFd,
xwrite(outputFd, &c, 1);
break;
}
if (c=='\t')
lastWasTab = TRUE;
else
lastWasTab = FALSE;
if (break_out) /* Enter is the command terminator, no more input. */
break;
@@ -353,32 +542,33 @@ extern int cmdedit_read_input(int inputFd, int outputFd,
reset_term = 0;
if (*(parsenextc)) { /* Handle command history log */
/* Handle command history log */
if (*(parsenextc)) {
struct history *h = his_end;
if (!h) { /* No previous history */
if (!h) {
/* No previous history */
h = his_front = malloc(sizeof(struct history));
h->n = malloc(sizeof(struct history));
h->p = NULL;
h->s = strdup(parsenextc);
h->n->p = h;
h->n->n = NULL;
h->n->s = NULL;
his_end = h->n;
history_counter++;
} else { /* Add a new history command */
} else {
/* Add a new history command */
h->n = malloc(sizeof(struct history));
h->n->p = h;
h->n->n = NULL;
h->n->s = NULL;
h->s = strdup(parsenextc);
his_end = h->n;
if (history_counter >= MAX_HISTORY) { /* After max history, remove the last known command */
/* After max history, remove the oldest command */
if (history_counter >= MAX_HISTORY) {
struct history *p = his_front->n;
@@ -398,8 +588,8 @@ extern int cmdedit_read_input(int inputFd, int outputFd,
extern void cmdedit_init(void)
{
atexit(cmdedit_reset_term);
signal(SIGINT, gotaSignal);
signal(SIGQUIT, gotaSignal);
signal(SIGTERM, gotaSignal);
signal(SIGINT, prepareToDie);
signal(SIGQUIT, prepareToDie);
signal(SIGTERM, prepareToDie);
}
#endif /* BB_FEATURE_SH_COMMAND_EDITING */