block_child_signal  200 src/callproc.c   block_child_signal (&oldset);
block_child_signal  675 src/callproc.c   block_child_signal (&oldset);
block_child_signal 2262 src/process.c    block_child_signal (&oldset);
block_child_signal 6998 src/process.c    block_child_signal (&oldset);
block_child_signal 8411 src/process.c    block_child_signal (&oldset);
block_child_signal   28 src/syssignal.h extern void block_child_signal (sigset_t *);