From 037576d77b62186551ad07b10eb46a73144b9f84 Mon Sep 17 00:00:00 2001
From: Denis Vlasenko <vda.linux@googlemail.com>
Date: Sat, 20 Oct 2007 18:30:38 +0000
Subject: read_line_input: fix it to not do any fancy editing if echoing is
disabled. ash: make read handling both more correct and smaller
read_line_input 4037 4101 +64
input_backward 140 139 -1
readcmd 1079 1070 -9
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/2 up/down: 65/-10) Total: 54 bytes
text data bss dec hex filename
777575 1000 9532 788107 c068b busybox_old
777629 1000 9532 788161 c06c1 busybox_unstripped
---
shell/ash.c | 45 ++++++++++++++++++++++++---------------------
1 file changed, 24 insertions(+), 21 deletions(-)
(limited to 'shell')
diff --git a/shell/ash.c b/shell/ash.c
index 52cf41ab5..58527bf9b 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -11491,7 +11491,7 @@ readcmd(int argc, char **argv)
int status;
int i;
#if ENABLE_ASH_READ_NCHARS
- int nch_flag = 0;
+ int n_flag = 0;
int nchars = 0;
int silent = 0;
struct termios tty, old_tty;
@@ -11521,10 +11521,10 @@ readcmd(int argc, char **argv)
break;
#if ENABLE_ASH_READ_NCHARS
case 'n':
- nchars = strtol(optionarg, &p, 10);
- if (*p)
+ nchars = bb_strtou(optionarg, NULL, 10);
+ if (nchars < 0 || errno)
ash_msg_and_raise_error("invalid count");
- nch_flag = (nchars > 0);
+ n_flag = nchars; /* just a flag "nchars is nonzero" */
break;
case 's':
silent = 1;
@@ -11532,14 +11532,15 @@ readcmd(int argc, char **argv)
#endif
#if ENABLE_ASH_READ_TIMEOUT
case 't':
- ts.tv_sec = strtol(optionarg, &p, 10);
+ ts.tv_sec = bb_strtou(optionarg, &p, 10);
ts.tv_usec = 0;
- if (*p == '.') {
+ /* EINVAL means number is ok, but not terminated by NUL */
+ if (*p == '.' && errno == EINVAL) {
char *p2;
if (*++p) {
int scale;
- ts.tv_usec = strtol(p, &p2, 10);
- if (*p2)
+ ts.tv_usec = bb_strtou(p, &p2, 10);
+ if (errno)
ash_msg_and_raise_error("invalid timeout");
scale = p2 - p;
/* normalize to usec */
@@ -11548,11 +11549,12 @@ readcmd(int argc, char **argv)
while (scale++ < 6)
ts.tv_usec *= 10;
}
- } else if (*p) {
+ } else if (ts.tv_sec < 0 || errno) {
ash_msg_and_raise_error("invalid timeout");
}
- if ( ! ts.tv_sec && ! ts.tv_usec)
+ if (!(ts.tv_sec | ts.tv_usec)) { /* both are 0? */
ash_msg_and_raise_error("invalid timeout");
+ }
break;
#endif
case 'r':
@@ -11572,16 +11574,15 @@ readcmd(int argc, char **argv)
if (ifs == NULL)
ifs = defifs;
#if ENABLE_ASH_READ_NCHARS
- if (nch_flag || silent) {
+ if (n_flag || silent) {
tcgetattr(0, &tty);
old_tty = tty;
- if (nch_flag) {
+ if (n_flag) {
tty.c_lflag &= ~ICANON;
tty.c_cc[VMIN] = nchars;
}
if (silent) {
tty.c_lflag &= ~(ECHO|ECHOK|ECHONL);
-
}
tcsetattr(0, TCSANOW, &tty);
}
@@ -11595,7 +11596,7 @@ readcmd(int argc, char **argv)
i = select(FD_SETSIZE, &set, NULL, NULL, &ts);
if (!i) {
#if ENABLE_ASH_READ_NCHARS
- if (nch_flag)
+ if (n_flag)
tcsetattr(0, TCSANOW, &old_tty);
#endif
return 1;
@@ -11606,12 +11607,7 @@ readcmd(int argc, char **argv)
startword = 1;
backslash = 0;
STARTSTACKSTR(p);
-#if ENABLE_ASH_READ_NCHARS
- while (!nch_flag || nchars--)
-#else
- for (;;)
-#endif
- {
+ do {
if (read(0, &c, 1) != 1) {
status = 1;
break;
@@ -11645,8 +11641,15 @@ readcmd(int argc, char **argv)
STPUTC(c, p);
}
}
+/* end of do {} while: */
+#if ENABLE_ASH_READ_NCHARS
+ while (!n_flag || --nchars);
+#else
+ while (1);
+#endif
+
#if ENABLE_ASH_READ_NCHARS
- if (nch_flag || silent)
+ if (n_flag || silent)
tcsetattr(0, TCSANOW, &old_tty);
#endif
--
cgit v1.2.3-55-g6feb