Annotated edit history of prctl(2) version 2, including all changes. View license author blame.
Rev Author # Line
1 perry 1 !!NAME
2 PerryLorier 2 prctl - operations on a process
1 perry 3
2 PerryLorier 5 __#include <sys/prctl.h>__
6 __int prctl(int__ ''option''__, unsigned long__ ''arg2''__, unsigned long__ ''arg3'' __, unsigned long__ ''arg4''__, unsigned long__ ''arg5''__);__
1 perry 7
2 PerryLorier 9 __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:
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2 PerryLorier 11 ;__PR_SET_PDEATHSIG__: (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().
1 perry 12
2 PerryLorier 13 ;__PR_GET_PDEATHSIG__: (since Linux 2.3.15) Read the current value of the parent process death signal into the (int *) ''arg2''.
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2 PerryLorier 16 On success, zero is returned. On error, -1 is returned, and ''errno'' is set appropriately.
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2 PerryLorier 19 ;[EINVAL]: The value of ''option'' is not recognized, or it is __PR_SET_PDEATHSIG__ and ''arg2'' is not zero or a signal number.
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2 PerryLorier 22 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
1 perry 23
2 PerryLorier 24 __ptrdiff_t prctl(int__ ''option''__, int__ ''arg2''__, int__ ''arg3''__);__
1 perry 25
2 PerryLorier 26 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.
1 perry 27 !!AVAILABILITY
2 PerryLorier 28 The prctl() systemcall was introduced in Linux 2.1.57. There is no prctl() library call as yet.
1 perry 29
31 signal(2)
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