prctl - operations on a process
#include <sys/prctl.h>
int prctl(int option, unsigned long arg2, unsigned long arg3 , unsigned
long arg4, unsigned long arg5);
prctl is called with a first argument describing what to do (with values
defined in <linux/prctl.h>), and further parameters with a significance
depending on the first one. The first argument can be:
PR_SET_PDEATHSIG [Toc] [Back]
(since Linux 2.1.57) Set the parent process death signal of the
current process to arg2 (either a signal value in the range
1..maxsig, or 0 to clear). This is the signal that the current
process will get when its parent dies. This value is cleared
upon a fork().
PR_GET_PDEATHSIG [Toc] [Back]
(since Linux 2.3.15) Read the current value of the parent
process death signal into the (int *) arg2.
On success, zero is returned. On error, -1 is returned, and errno is
set appropriately.
EINVAL The value of option is not recognized, or it is PR_SET_PDEATHSIG
and arg2 is not zero or a signal number.
This call is Linux-specific. IRIX has a prctl system call (also introduced
in Linux 2.1.44 as irix_prctl on the MIPS architecture), with
prototype
ptrdiff_t prctl(int option, int arg2, int arg3);
and options to get the maximum number of processes per user, get the
maximum number of processors the calling process can use, find out
whether a specified process is currently blocked, get or set the maximum
stack size, etc., etc.
The prctl() systemcall was introduced in Linux 2.1.57. There is no
prctl() library call as yet.
signal(2)
Linux 2.3.15 1998-02-03 PRCTL(2)
[ Back ] | 