summaryrefslogtreecommitdiff
path: root/libbb/xfuncs.c
diff options
context:
space:
mode:
Diffstat (limited to 'libbb/xfuncs.c')
-rw-r--r--libbb/xfuncs.c57
1 files changed, 57 insertions, 0 deletions
diff --git a/libbb/xfuncs.c b/libbb/xfuncs.c
index 68ad3de..b08f92d 100644
--- a/libbb/xfuncs.c
+++ b/libbb/xfuncs.c
@@ -205,6 +205,63 @@ int wait4pid(int pid)
return 0;
}
+int wait_nohang(int *wstat)
+{
+ return waitpid(-1, wstat, WNOHANG);
+}
+
+int wait_pid(int *wstat, int pid)
+{
+ int r;
+
+ do
+ r = waitpid(pid, wstat, 0);
+ while ((r == -1) && (errno == EINTR));
+ return r;
+}
+
+void sig_block(int sig)
+{
+ sigset_t ss;
+ sigemptyset(&ss);
+ sigaddset(&ss, sig);
+ sigprocmask(SIG_BLOCK, &ss, NULL);
+}
+
+void sig_unblock(int sig)
+{
+ sigset_t ss;
+ sigemptyset(&ss);
+ sigaddset(&ss, sig);
+ sigprocmask(SIG_UNBLOCK, &ss, NULL);
+}
+
+#if 0
+void sig_blocknone(void)
+{
+ sigset_t ss;
+ sigemptyset(&ss);
+ sigprocmask(SIG_SETMASK, &ss, NULL);
+}
+#endif
+
+void sig_catch(int sig, void (*f)(int))
+{
+ struct sigaction sa;
+ sa.sa_handler = f;
+ sa.sa_flags = 0;
+ sigemptyset(&sa.sa_mask);
+ sigaction(sig, &sa, NULL);
+}
+
+void sig_pause(void)
+{
+ sigset_t ss;
+ sigemptyset(&ss);
+ sigsuspend(&ss);
+}
+
+
void xsetenv(const char *key, const char *value)
{
if (setenv(key, value, 1))