Man page - prctl(2)

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Manual

prctl

이 름
라 이 브 러 리
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μ„€ λͺ…
반 ν™˜ κ°’
에 러
버 μ „ S
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CAVEATS
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번 μ—­

이 름

prctl - operations on a process or thread

라 이 브 러 리

ν‘œ μ€€ C 라 이 브 러 리 ( libc , -lc )

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#include <linux/prctl.h> /* PR_* 상 수 의 μ • 의 */
#include <sys/prctl.h>

int prctl(int op , ...);

μ„€ λͺ…

prctl () manipulates various aspects of the behavior of the calling thread or process.

prctl () is called with a first argument describing what to do, and further arguments with a significance depending on the first one. The first argument can be:
PR_CAP_AMBIENT
PR_CAPBSET_READ
PR_CAPBSET_DROP
PR_SET_CHILD_SUBREAPER
PR_GET_CHILD_SUBREAPER
PR_SET_DUMPABLE
PR_GET_DUMPABLE
PR_SET_ENDIAN
PR_GET_ENDIAN
PR_SET_FP_MODE
PR_GET_FP_MODE
PR_SET_FPEMU
PR_GET_FPEMU
PR_SET_FPEXC
PR_GET_FPEXC
PR_SET_IO_FLUSHER
PR_GET_IO_FLUSHER
PR_SET_KEEPCAPS
PR_GET_KEEPCAPS
PR_MCE_KILL
PR_MCE_KILL_GET
PR_SET_MM
PR_SET_VMA
PR_MPX_ENABLE_MANAGEMENT
PR_MPX_DISABLE_MANAGEMENT
PR_SET_NAME
PR_GET_NAME
PR_SET_NO_NEW_PRIVS
PR_GET_NO_NEW_PRIVS
PR_PAC_RESET_KEYS
PR_SET_PDEATHSIG
PR_GET_PDEATHSIG
PR_SET_PTRACER
PR_SET_SECCOMP
PR_GET_SECCOMP
PR_SET_SECUREBITS
PR_GET_SECUREBITS
PR_GET_SPECULATION_CTRL
PR_SET_SPECULATION_CTRL
PR_SVE_SET_VL
PR_SVE_GET_VL
PR_SET_SYSCALL_USER_DISPATCH
PR_SET_TAGGED_ADDR_CTRL
PR_GET_TAGGED_ADDR_CTRL
PR_TASK_PERF_EVENTS_DISABLE
PR_TASK_PERF_EVENTS_ENABLE
PR_SET_THP_DISABLE
PR_GET_THP_DISABLE
PR_GET_TID_ADDRESS
PR_SET_TIMERSLACK
PR_GET_TIMERSLACK
PR_SET_TIMING
PR_GET_TIMING
PR_SET_TSC
PR_GET_TSC
PR_SET_UNALIGN
PR_GET_UNALIGN
PR_GET_AUXV
PR_SET_MDWE
PR_GET_MDWE

반 ν™˜ κ°’

On success, a nonnegative value is returned. On error, -1 is returned, and errno is set to indicate the error.

에 러

EINVAL

The value of op is not recognized, or not supported on this system.

EINVAL

An unused argument is nonzero.

버 μ „ S

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 op , int arg2 , int arg3 );

and operations 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, and so on.

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리 λˆ… 슀 .

이 λ ₯

Linux 2.1.57, glibc 2.0.6

CAVEATS

The prototype of the libc wrapper uses a variadic argument list. This makes it necessary to pass the arguments with the right width. When passing numeric constants, such as 0, use a suffix: 0L .

Careless use of some prctl () operations can confuse the user-space run-time environment, so these operations should be used with care.

μΆ” κ°€ μ°Έ μ‘°

signal (2), PR_CAP_AMBIENT (2const), PR_CAPBSET_READ (2const), PR_CAPBSET_DROP (2const), PR_SET_CHILD_SUBREAPER (2const), PR_GET_CHILD_SUBREAPER (2const), PR_SET_DUMPABLE (2const), PR_GET_DUMPABLE (2const), PR_SET_ENDIAN (2const), PR_GET_ENDIAN (2const), PR_SET_FP_MODE (2const), PR_GET_FP_MODE (2const), PR_SET_FPEMU (2const), PR_GET_FPEMU (2const), PR_SET_FPEXC (2const), PR_GET_FPEXC (2const), PR_SET_IO_FLUSHER (2const), PR_GET_IO_FLUSHER (2const), PR_SET_KEEPCAPS (2const), PR_GET_KEEPCAPS (2const), PR_MCE_KILL (2const), PR_MCE_KILL_GET (2const), PR_SET_MM (2const), PR_SET_VMA (2const), PR_MPX_ENABLE_MANAGEMENT (2const), PR_MPX_DISABLE_MANAGEMENT (2const), PR_SET_NAME (2const), PR_GET_NAME (2const), PR_SET_NO_NEW_PRIVS (2const), PR_GET_NO_NEW_PRIVS (2const), PR_PAC_RESET_KEYS (2const), PR_SET_PDEATHSIG (2const), PR_GET_PDEATHSIG (2const), PR_SET_PTRACER (2const), PR_SET_SECCOMP (2const), PR_GET_SECCOMP (2const), PR_SET_SECUREBITS (2const), PR_GET_SECUREBITS (2const), PR_SET_SPECULATION_CTRL (2const), PR_GET_SPECULATION_CTRL (2const), PR_SVE_SET_VL (2const), PR_SVE_GET_VL (2const), PR_SET_SYSCALL_USER_DISPATCH (2const), PR_SET_TAGGED_ADDR_CTRL (2const), PR_GET_TAGGED_ADDR_CTRL (2const), PR_TASK_PERF_EVENTS_DISABLE (2const), PR_TASK_PERF_EVENTS_ENABLE (2const), PR_SET_THP_DISABLE (2const), PR_GET_THP_DISABLE (2const), PR_GET_TID_ADDRESS (2const), PR_SET_TIMERSLACK (2const), PR_GET_TIMERSLACK (2const), PR_SET_TIMING (2const), PR_GET_TIMING (2const), PR_SET_TSC (2const), PR_GET_TSC (2const), PR_SET_UNALIGN (2const), PR_GET_UNALIGN (2const), PR_GET_AUXV (2const), PR_SET_MDWE (2const), PR_GET_MDWE (2const), core (5)

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