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diff -uNr klibc-1.5.18.orig//usr/dash/miscbltin.c klibc-1.5.18/usr/dash/miscbltin.c
--- klibc-1.5.18.orig//usr/dash/miscbltin.c 2010-04-22 02:08:49.000000000 +0200
+++ klibc-1.5.18/usr/dash/miscbltin.c 2010-05-03 13:55:32.000000000 +0200
@@ -46,6 +46,7 @@
#include <ctype.h>
#include <stdint.h>
#include <time.h> /* strtotimeval() */
+#include <termios.h>
#include "shell.h"
#include "options.h"
@@ -140,6 +141,11 @@
int timeout;
int i;
fd_set set;
+ int n_flag = 0;
+ unsigned int nchars = 0;
+ int silent = 0;
+ struct termios tty, old_tty;
+
struct timeval ts, t0, t1, to;
ts.tv_sec = ts.tv_usec = 0;
@@ -147,11 +153,18 @@
rflag = 0;
timeout = 0;
prompt = NULL;
- while ((i = nextopt("p:rt:")) != '\0') {
+ while ((i = nextopt("p:rt:n:s")) != '\0') {
switch(i) {
case 'p':
prompt = optionarg;
break;
+ case 'n':
+ nchars = strtoul(optionarg, NULL, 10);
+ n_flag = nchars; /* just a flag "nchars is nonzero" */
+ break;
+ case 's':
+ silent = 1;
+ break;
case 't':
p = strtotimeval(optionarg, &ts);
if (*p || (!ts.tv_sec && !ts.tv_usec))
@@ -173,6 +186,24 @@
}
if (*(ap = argptr) == NULL)
sh_error("arg count");
+ if (n_flag || silent) {
+ if (tcgetattr(0, &tty) != 0) {
+ /* Not a tty */
+ n_flag = 0;
+ silent = 0;
+ } else {
+ old_tty = tty;
+ if (n_flag) {
+ tty.c_lflag &= ~ICANON;
+ tty.c_cc[VMIN] = nchars < 256 ? nchars : 255;
+ }
+ if (silent) {
+ tty.c_lflag &= ~(ECHO | ECHOK | ECHONL);
+ }
+ tcsetattr(0, TCSANOW, &tty);
+ }
+ }
+
status = 0;
backslash = 0;
if (timeout) {
@@ -187,13 +218,15 @@
ts.tv_sec += t0.tv_sec;
}
STARTSTACKSTR(p);
- for (;;) {
+ do {
if (timeout) {
gettimeofday(&t1, NULL);
if (t1.tv_sec > ts.tv_sec ||
(t1.tv_sec == ts.tv_sec &&
t1.tv_usec >= ts.tv_usec)) {
status = 1;
+ if (n_flag)
+ tcsetattr(0, TCSANOW, &old_tty);
break; /* Timeout! */
}
@@ -210,6 +243,8 @@
FD_SET(0, &set);
if (select(1, &set, NULL, NULL, &to) != 1) {
status = 1;
+ if (n_flag)
+ tcsetattr(0, TCSANOW, &old_tty);
break; /* Timeout! */
}
}
@@ -235,7 +270,10 @@
STPUTC(c, p);
resetbs:
backslash = 0;
- }
+ } while (!n_flag || --nchars);
+ if (n_flag || silent)
+ tcsetattr(0, TCSANOW, &old_tty);
+
STACKSTRNUL(p);
readcmd_handle_line(stackblock(), ap, p + 1 - (char *)stackblock());
return status;
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