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init: set stderr to NONBLOCK

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*: s/setenv(a,b,1)/xsetenv(a,b)/

function                                             old     new   delta
init_main                                            856     895     +39
message                                              146     144      -2
crond_main                                          1418    1416      -2
run                                                  661     658      -3
zcip_main                                           1409    1403      -6
edit_file                                            910     901      -9
environment                                           20       -     -20
This commit is contained in:
Denis Vlasenko 2008-09-20 16:28:59 +00:00
parent b61dc1c1ce
commit b8d1a4cd5f
4 changed files with 22 additions and 27 deletions
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33
init/init.c
View file

@ -77,14 +77,6 @@ enum {
#endif
};
static const char *const environment[] = {
"HOME=/",
bb_PATH_root_path,
"SHELL=/bin/sh",
"USER=root",
NULL
};
/* Function prototypes */
static void halt_reboot_pwoff(int sig) NORETURN;
@ -118,15 +110,16 @@ static void message(int where, const char *fmt, ...)
{
static int log_fd = -1;
va_list arguments;
int l;
unsigned l;
char msg[128];
msg[0] = '\r';
va_start(arguments, fmt);
vsnprintf(msg + 1, sizeof(msg) - 2, fmt, arguments);
l = vsnprintf(msg + 1, sizeof(msg) - 2, fmt, arguments);
if (l > sizeof(msg) - 2)
l = sizeof(msg) - 2;
msg[l] = '\0';
va_end(arguments);
msg[sizeof(msg) - 2] = '\0';
l = strlen(msg);
if (ENABLE_FEATURE_INIT_SYSLOG) {
/* Log the message to syslogd */
@ -213,6 +206,8 @@ static void console_init(void)
/* Make sure fd 0,1,2 are not closed
* (so that they won't be used by future opens) */
bb_sanitize_stdio();
/* Make sure init can't be blocked by writing to stderr */
fcntl(STDERR_FILENO, F_SETFL, fcntl(STDERR_FILENO, F_GETFL) | O_NONBLOCK);
}
s = getenv("TERM");
@ -825,15 +820,15 @@ int init_main(int argc UNUSED_PARAM, char **argv)
set_sane_term();
xchdir("/");
setsid();
{
const char *const *e;
/* Make sure environs is set to something sane */
for (e = environment; *e; e++)
putenv((char *) *e);
}
/* Make sure environs is set to something sane */
putenv((char *) "HOME=/");
putenv((char *) bb_PATH_root_path);
putenv((char *) "SHELL=/bin/sh");
putenv((char *) "USER=root"); /* needed? why? */
if (argv[1])
setenv("RUNLEVEL", argv[1], 1);
xsetenv("RUNLEVEL", argv[1]);
/* Hello world */
message(MAYBE_CONSOLE | L_LOG, "init started: %s", bb_banner);