#include #include "sig.h" void sig_hangupblock() { sig_block(SIGHUP); } void sig_hangupunblock() { sig_unblock(SIGHUP); } void sig_hangupcatch(f) void (*f)(); { sig_catch(SIGHUP,f); } void sig_hangupdefault() { sig_catch(SIGHUP,SIG_DFL); }