init: do not close all descriptors > 2. We were doing it - sometimes.
Good choices are "do it, always" or "don't do it". Second is smaller.
diff --git a/init/init.c b/init/init.c
index eefb9df..c4674a5 100644
--- a/init/init.c
+++ b/init/init.c
@@ -214,8 +214,7 @@
if (fd >= 0) {
dup2(fd, 0);
dup2(fd, 1);
- dup2(fd, 2);
- while (fd > 2) close(fd--);
+ xmove_fd(fd, 2);
}
messageD(L_LOG, "console='%s'", s);
} else {
@@ -223,7 +222,7 @@
* (so that they won't be used by future opens) */
/* bb_sanitize_stdio(); - WRONG.
- * Fail if "/dev/null" doesnt exist, and for init
+ * It fails if "/dev/null" doesnt exist, and for init
* this is a real possibility! Open code it instead. */
int fd = open(bb_dev_null, O_RDWR);
@@ -234,11 +233,11 @@
while ((unsigned)fd < 2)
fd = dup(fd);
if (fd > 2)
- close (fd);
+ close(fd);
}
s = getenv("TERM");
- if (ioctl(0, TIOCGSERIAL, &sr) == 0) {
+ if (ioctl(STDIN_FILENO, TIOCGSERIAL, &sr) == 0) {
/* Force the TERM setting to vt102 for serial console
* if TERM is set to linux (the default) */
if (!s || strcmp(s, "linux") == 0)