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line editing: make read_line_input() not take timeout param

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It's almost always -1.

function                                             old     new   delta
read_line_input                                     3902    3912     +10
new_line_input_t                                      24      31      +7
pgetc                                                583     585      +2
save_command_ps_at_cur_history                        80      78      -2
read_line                                             76      74      -2
fgetc_interactive                                    246     244      -2
addLines                                              84      82      -2
doCommands                                          2226    2222      -4
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/5 up/down: 19/-12)              Total: 7 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2017-08-02 17:27:28 +02:00
parent dd4b446f76
commit 84ea60ed65
6 changed files with 30 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
editors/ed.c
View File

@ -360,7 +360,7 @@ static void addLines(int num)
* 0 on ctrl-C,
* >0 length of input string, including terminating '\n'
*/
len = read_line_input(NULL, "", buf, sizeof(buf), /*timeout*/ -1);
len = read_line_input(NULL, "", buf, sizeof(buf));
if (len <= 0) {
/* Previously, ctrl-C was exiting to shell.
* Now we exit to ed prompt. Is in important? */
@ -789,7 +789,7 @@ static void doCommands(void)
* 0 on ctrl-C,
* >0 length of input string, including terminating '\n'
*/
len = read_line_input(NULL, ": ", buf, sizeof(buf), /*timeout*/ -1);
len = read_line_input(NULL, ": ", buf, sizeof(buf));
if (len <= 0)
return;
while (len && isspace(buf[--len]))
@ -892,7 +892,7 @@ static void doCommands(void)
}
if (!dirty)
return;
len = read_line_input(NULL, "Really quit? ", buf, 16, /*timeout*/ -1);
len = read_line_input(NULL, "Really quit? ", buf, 16);
/* read error/EOF - no way to continue */
if (len < 0)
return;

11
include/libbb.h
View File

@ -1639,9 +1639,9 @@ enum {
* buffer[0] is used as a counter of buffered chars and must be 0
* on first call.
* timeout:
* -2: do not poll for input;
* -1: poll(-1) (i.e. block);
* >=0: poll for TIMEOUT milliseconds, return -1/EAGAIN on timeout
* -2: do not poll(-1) for input - read() it, return on EAGAIN at once
* -1: poll(-1) (i.e. block even on NONBLOCKed fd)
* >=0: poll() for TIMEOUT milliseconds, return -1/EAGAIN on timeout
*/
int64_t read_key(int fd, char *buffer, int timeout) FAST_FUNC;
void read_key_ungets(char *buffer, const char *str, unsigned len) FAST_FUNC;
@ -1657,6 +1657,7 @@ unsigned size_from_HISTFILESIZE(const char *hp) FAST_FUNC;
# endif
typedef struct line_input_t {
int flags;
int timeout;
const char *path_lookup;
# if MAX_HISTORY
int cnt_history;
@ -1692,7 +1693,7 @@ line_input_t *new_line_input_t(int flags) FAST_FUNC;
* 0 on ctrl-C (the line entered is still returned in 'command'),
* >0 length of input string, including terminating '\n'
*/
int read_line_input(line_input_t *st, const char *prompt, char *command, int maxsize, int timeout) FAST_FUNC;
int read_line_input(line_input_t *st, const char *prompt, char *command, int maxsize) FAST_FUNC;
void show_history(const line_input_t *st) FAST_FUNC;
# if ENABLE_FEATURE_EDITING_SAVE_ON_EXIT
void save_history(line_input_t *st);
@ -1700,7 +1701,7 @@ void save_history(line_input_t *st);
#else
#define MAX_HISTORY 0
int read_line_input(const char* prompt, char* command, int maxsize) FAST_FUNC;
#define read_line_input(state, prompt, command, maxsize, timeout) \
#define read_line_input(state, prompt, command, maxsize) \
read_line_input(prompt, command, maxsize)
#endif

23
libbb/lineedit.c
View File

@ -1267,6 +1267,7 @@ line_input_t* FAST_FUNC new_line_input_t(int flags)
{
line_input_t *n = xzalloc(sizeof(*n));
n->flags = flags;
n->timeout = -1;
#if MAX_HISTORY > 0
n->max_history = MAX_HISTORY;
#endif
@ -2130,7 +2131,7 @@ enum {
* Backspace deletes last matched char.
* Control keys exit search and return to normal editing (at current history line).
*/
static int32_t reverse_i_search(void)
static int32_t reverse_i_search(int timeout)
{
char match_buf[128]; /* for user input */
char read_key_buffer[KEYCODE_BUFFER_SIZE];
@ -2152,8 +2153,8 @@ static int32_t reverse_i_search(void)
int h;
unsigned match_buf_len = strlen(match_buf);
//FIXME: correct timeout?
ic = lineedit_read_key(read_key_buffer, -1);
//FIXME: correct timeout? (i.e. count it down?)
ic = lineedit_read_key(read_key_buffer, timeout);
switch (ic) {
case CTRL('R'): /* searching for the next match */
@ -2256,9 +2257,10 @@ static int32_t reverse_i_search(void)
* (in both cases the cursor remains on the input line, '\n' is not printed)
* >0 length of input string, including terminating '\n'
*/
int FAST_FUNC read_line_input(line_input_t *st, const char *prompt, char *command, int maxsize, int timeout)
int FAST_FUNC read_line_input(line_input_t *st, const char *prompt, char *command, int maxsize)
{
int len;
int timeout;
#if ENABLE_FEATURE_TAB_COMPLETION
smallint lastWasTab = 0;
#endif
@ -2297,8 +2299,15 @@ int FAST_FUNC read_line_input(line_input_t *st, const char *prompt, char *comman
maxsize = MAX_LINELEN;
S.maxsize = maxsize;
/* With zero flags, no other fields are ever used */
state = st ? st : (line_input_t*) &const_int_0;
timeout = -1;
/* Make state->flags == 0 if st is NULL.
* With zeroed flags, no other fields are ever referenced.
*/
state = (line_input_t*) &const_int_0;
if (st) {
state = st;
timeout = st->timeout;
}
#if MAX_HISTORY > 0
# if ENABLE_FEATURE_EDITING_SAVEHISTORY
if (state->hist_file)
@ -2510,7 +2519,7 @@ int FAST_FUNC read_line_input(line_input_t *st, const char *prompt, char *comman
}
#if ENABLE_FEATURE_REVERSE_SEARCH
case CTRL('R'):
ic = ic_raw = reverse_i_search();
ic = ic_raw = reverse_i_search(timeout);
goto again;
#endif

5
shell/ash.c
View File

@ -10185,8 +10185,8 @@ preadfd(void)
if (!iflag || g_parsefile->pf_fd != STDIN_FILENO)
nr = nonblock_immune_read(g_parsefile->pf_fd, buf, IBUFSIZ - 1);
else {
int timeout = -1;
# if ENABLE_ASH_IDLE_TIMEOUT
int timeout = -1;
if (iflag) {
const char *tmout_var = lookupvar("TMOUT");
if (tmout_var) {
@ -10195,12 +10195,13 @@ preadfd(void)
timeout = -1;
}
}
line_input_state->timeout = timeout;
# endif
# if ENABLE_FEATURE_TAB_COMPLETION
line_input_state->path_lookup = pathval();
# endif
reinit_unicode_for_ash();
nr = read_line_input(line_input_state, cmdedit_prompt, buf, IBUFSIZ, timeout);
nr = read_line_input(line_input_state, cmdedit_prompt, buf, IBUFSIZ);
if (nr == 0) {
/* ^C pressed, "convert" to SIGINT */
write(STDOUT_FILENO, "^C", 2);

3
shell/hush.c
View File

@ -2411,8 +2411,7 @@ static int get_user_input(struct in_str *i)
/* buglet: SIGINT will not make new prompt to appear _at once_,
* only after <Enter>. (^C works immediately) */
r = read_line_input(G.line_input_state, prompt_str,
G.user_input_buf, CONFIG_FEATURE_EDITING_MAX_LEN-1,
/*timeout*/ -1
G.user_input_buf, CONFIG_FEATURE_EDITING_MAX_LEN-1
);
/* read_line_input intercepts ^C, "convert" it to SIGINT */
if (r == 0)

2
util-linux/fdisk.c
View File

@ -644,7 +644,7 @@ read_line(const char *prompt)
{
int sz;
sz = read_line_input(NULL, prompt, line_buffer, sizeof(line_buffer), /*timeout*/ -1);
sz = read_line_input(NULL, prompt, line_buffer, sizeof(line_buffer));
if (sz <= 0)
exit(EXIT_SUCCESS); /* Ctrl-D or Ctrl-C */