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authorDenys Vlasenko2016-09-13 21:05:48 +0200
committerDenys Vlasenko2016-09-13 21:05:48 +0200
commit7fa799a97d381902ab27556918722a6e2d138b9e (patch)
tree6caca4a32217c396cd0b78ab994b3ec4f42d96bb /miscutils
parent3c0e579a06c3f1d428d3642fc46beb4b635e5e6d (diff)
downloadbusybox-7fa799a97d381902ab27556918722a6e2d138b9e.zip
busybox-7fa799a97d381902ab27556918722a6e2d138b9e.tar.gz
less: switch off nonblock on kbd_fd before exit
This is only necessary if we use stdout fd. function old new delta less_exit 32 51 +19 less_main 2540 2543 +3 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/0 up/down: 22/0) Total: 22 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'miscutils')
-rw-r--r--miscutils/less.c12
1 files changed, 5 insertions, 7 deletions
diff --git a/miscutils/less.c b/miscutils/less.c
index 877ab6e..61acfdc 100644
--- a/miscutils/less.c
+++ b/miscutils/less.c
@@ -169,6 +169,7 @@ enum { pattern_valid = 0 };
struct globals {
int cur_fline; /* signed */
int kbd_fd; /* fd to get input from */
+ int kbd_fd_orig_flags;
int less_gets_pos;
/* last position in last line, taking into account tabs */
size_t last_line_pos;
@@ -304,6 +305,8 @@ static void print_statusline(const char *str)
static void less_exit(int code)
{
set_tty_cooked();
+ if (!(G.kbd_fd_orig_flags & O_NONBLOCK))
+ ndelay_off(kbd_fd);
clear_line();
if (code < 0)
kill_myself_with_sig(- code); /* does not return */
@@ -1813,16 +1816,11 @@ int less_main(int argc, char **argv)
try_ctty:
tty_fd = open(CURRENT_TTY, O_RDONLY);
if (tty_fd < 0) {
- /*
- * If all else fails, less 481 uses stdout. Mimic that.
- * Testcase where usually both ttyname(STDOUT_FILENO)
- * and open(CURRENT_TTY) fail:
- * su -s /bin/sh -c 'busybox less FILE' - nobody
- */
+ /* If all else fails, less 481 uses stdout. Mimic that */
tty_fd = STDOUT_FILENO;
}
}
- ndelay_on(tty_fd);
+ G.kbd_fd_orig_flags = ndelay_on(tty_fd);
kbd_fd = tty_fd; /* save in a global */
tcgetattr(kbd_fd, &term_orig);