api/4.15.1/rpmsq_8h_source.html

 #ifndef H_RPMSQ
 #define H_RPMSQ

 #include <rpm/rpmsw.h>
 #include <signal.h>

 #ifdef __cplusplus
 extern "C" {
 #endif

 typedef void (*rpmsqAction_t) (int signum, siginfo_t * info, void * context);

 #define RPMSQ_DFL       ((rpmsqAction_t)0)
 #define RPMSQ_IGN       ((rpmsqAction_t)1)
 #define RPMSQ_ERR       ((rpmsqAction_t)-1)

 int rpmsqIsCaught(int signum);

 int rpmsqActivate(int state);

 rpmsqAction_t rpmsqSetAction(int signum, rpmsqAction_t handler);

 int rpmsqBlock(int op);

 int rpmsqPoll(void);

 void rpmsqSetInterruptSafety(int on);

 #ifdef __cplusplus
 }
 #endif

 #endif  /* H_RPMSQ */
rpmsqAction_t
void(* rpmsqAction_t)(int signum, siginfo_t *info, void *context)
Default signal handler prototype.
Definition: rpmsq.h:22

rpmsqIsCaught
int rpmsqIsCaught(int signum)
Test if given signal has been caught (while signals blocked).

rpmsqPoll
int rpmsqPoll(void)
Poll for caught signals, executing their handlers.

rpmsqSetAction
rpmsqAction_t rpmsqSetAction(int signum, rpmsqAction_t handler)
Set or delete a signal handler for a signal.

rpmsqActivate
int rpmsqActivate(int state)
Activate (or disable) the signal queue.

rpmsqSetInterruptSafety
void rpmsqSetInterruptSafety(int on)

rpmsqBlock
int rpmsqBlock(int op)
Block or unblock (almost) all signals.