1 PSIGNAL(3PROC) Process Control Library Functions PSIGNAL(3PROC) 2 3 NAME 4 Psignal - set signal tracing action 5 6 LIBRARY 7 Process Control Library (libproc, -lproc) 8 9 SYNOPSIS 10 #include <libproc.h> 11 12 int 13 Psignal(struct ps_prochandle *P, int which, int stop); 14 15 DESCRIPTION 16 The Psignal() function sets the signal tracing flag for the process 17 handle P. If stop is non-zero it causes the process handle to stop 18 threads that encounter the signal which. If stop is zero, then it 19 disables tracing for the signal which. 20 21 The signal constants, representing valid values for which, can be found 22 in signal.h(3HEAD). The signal SIGKILL may not be stopped. 23 24 Note, only active processes may have their signal tracing flags updated. 25 Process handles that refer to core files, zombie processes, and files do 26 not have signal tracing flags. Calling this function on them is an 27 error. 28 29 RETURN VALUES 30 Upon successful completion, the Psignal() function returns the previous 31 disposition of the signal which. It returns 1 if it was set and 0 if 32 not. Otherwise, -1 is returned and errno is set to indicate the error. 33 34 ERRORS 35 The Psignal() function will fail if: 36 37 EINVAL which is SIGKILL and stop is non-zero . 38 39 which is not a valid signal. 40 41 ENOENT P does not correspond to an active process. 42 43 INTERFACE STABILITY 44 Uncommitted 45 46 MT-LEVEL 47 See LOCKING in libproc(3LIB). 48 49 SEE ALSO 50 signal.h(3HEAD), libproc(3LIB), Psetsignal(3PROC), proc(4) 51 52 illumos May 11, 2016 illumos