tcpsvd: new applet

It's a GPL-ed 'clone' of Dan Bernstein's tcpserver.
Author: Gerrit Pape <pape@smarden.org>
http://smarden.sunsite.dk/ipsvd/
size tcpsvd.o
   text    data     bss     dec     hex filename
   2571       4      16    2591     a1f tcpsvd.o

2 files changed, 62 insertions, 7 deletions

diff --git a/libbb/xconnect.c b/libbb/xconnect.c
index 118fe3e75..a331e6bc4 100644
--- a/libbb/xconnect.c
+++ b/libbb/xconnect.c
@@ -82,15 +82,15 @@ int xconnect_tcp_v4(struct sockaddr_in *s_addr)
 /* "New" networking API */
 
 
-int get_nport(const len_and_sockaddr *lsa)
+int get_nport(const struct sockaddr *sa)
 {
 #if ENABLE_FEATURE_IPV6
-        if (lsa->sa.sa_family == AF_INET6) {
-                return lsa->sin6.sin6_port;
+        if (sa->sa_family == AF_INET6) {
+                return ((struct sockaddr_in6*)sa)->sin6_port;
         }
 #endif
-        if (lsa->sa.sa_family == AF_INET) {
-                return lsa->sin.sin_port;
+        if (sa->sa_family == AF_INET) {
+                return ((struct sockaddr_in*)sa)->sin_port;
         }
         /* What? UNIX socket? IPX?? :) */
         return -1;
@@ -308,12 +308,10 @@ char* xmalloc_sockaddr2host(const struct sockaddr *sa, socklen_t salen)
         return sockaddr2str(sa, salen, 0);
 }
 
-/* Unused
 char* xmalloc_sockaddr2host_noport(const struct sockaddr *sa, socklen_t salen)
 {
         return sockaddr2str(sa, salen, IGNORE_PORT);
 }
-*/
 
 char* xmalloc_sockaddr2hostonly_noport(const struct sockaddr *sa, socklen_t salen)
 {
diff --git a/libbb/xfuncs.c b/libbb/xfuncs.c
index 68ad3dec4..b08f92d81 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))