Thanks for the hints and explanations.
Here is an updated patch.
Thomas
--- ash.c.orig 2011-02-03 11:06:35.000000000 +0100
+++ ash.c 2011-02-03 11:14:20.000000000 +0100
@@ -182,6 +182,14 @@
//config: This option recreates the prompt string from the environment
//config: variable each time it is displayed.
//config:
+//config:config ASH_IDLE_TIMEOUT
+//config: bool "Idle timeout"
+//config: default n
+//config: depends on ASH
+//config: help
+//config: Enables bash-like auto-logout after "$TMOUT" seconds of idle
+//config: time. The default value of "$TMOUT" is 300 seconds.
+//config:
//usage:#define ash_trivial_usage NOUSAGE_STR
//usage:#define ash_full_usage ""
@@ -12045,6 +12053,19 @@
return exitstatus;
}
+#if ENABLE_ASH_IDLE_TIMEOUT
+static volatile int timed_out;
+
+static void alrm_catcher(int sig UNUSED_PARAM)
+{
+ int e = errno;
+ fdprintf(2, "\007timed out waiting for input: auto-logout\n");
+ errno = e;
+ timed_out = 1;
+ return;
+}
+#endif
+
/*
* Read and execute commands.
* "Top" is nonzero for the top level command loop;
@@ -12057,11 +12078,28 @@
struct stackmark smark;
int inter;
int numeof = 0;
+#if ENABLE_ASH_IDLE_TIMEOUT
+ int tmout_len;
+ const char *tmout_var; /* timeout value for auto-logout */
+#endif
TRACE(("cmdloop(%d) called\n", top));
for (;;) {
int skip;
+#if ENABLE_ASH_IDLE_TIMEOUT
+ timed_out = 0;
+ tmout_var = NULL;
+ tmout_len = 0;
+ if (iflag) {
+ if ((tmout_var = lookupvar("TMOUT")) != NULL
+ && (tmout_len = atoi(tmout_var)) > 0) {
+ signal(SIGALRM, alrm_catcher);
+ alarm(tmout_len);
+ }
+ }
+#endif
+
setstackmark(&smark);
#if JOBS
if (doing_jobctl)
@@ -12075,6 +12113,12 @@
#endif
}
n = parsecmd(inter);
+#if ENABLE_ASH_IDLE_TIMEOUT
+ if (timed_out)
+ break;
+ if (tmout_len > 0)
+ alarm(0);
+#endif
#if DEBUG
if (DEBUG > 2 && debug && (n != NODE_EOF))
showtree(n);
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