PR_SET_PTRACER(2const) — Linux manual page

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | STANDARDS | HISTORY | SEE ALSO | COLOPHON

PR_SET_PTRACER(2const)                            PR_SET_PTRACER(2const)

NAME         top

       PR_SET_PTRACER - allow processes to ptrace(2) the calling process

LIBRARY         top

       Standard C library (libc, -lc)

SYNOPSIS         top

       #include <linux/prctl.h>  /* Definition of PR_* constants */
       #include <sys/prctl.h>

       int prctl(PR_SET_PTRACER, long pid);

DESCRIPTION         top

       This is meaningful only when the Yama LSM is enabled and in mode
       1 ("restricted ptrace", visible via /proc/sys/kernel/yama/
       ptrace_scope).

       When a "ptracer process ID" is passed in pid, the caller is
       declaring that the ptracer process can ptrace(2) the calling
       process as if it were a direct process ancestor.

       Each PR_SET_PTRACER operation replaces the previous "ptracer
       process ID".

       Employing PR_SET_PTRACER with pid set to 0 clears the caller's
       "ptracer process ID".  If pid is PR_SET_PTRACER_ANY, the ptrace
       restrictions introduced by Yama are effectively disabled for the
       calling process.

RETURN VALUE         top

       On success, 0 is returned.  On error, -1 is returned, and errno
       is set to indicate the error.

ERRORS         top

       EINVAL pid is not 0, PR_SET_PTRACER_ANY, nor the PID of an
              existing process.

STANDARDS         top

       Linux.

HISTORY         top

       Linux 3.4.

SEE ALSO         top

       prctl(2),

       For further information, see the kernel source file
       Documentation/admin-guide/LSM/Yama.rst (or Documentation/
       security/Yama.txt before Linux 4.13).

COLOPHON         top

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Linux man-pages 6.9.1          2024-06-02         PR_SET_PTRACER(2const)

Pages that refer to this page: prctl(2)