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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | FILES | STANDARDS | HISTORY | SEE ALSO | COLOPHON |
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PR_SET_DUMPABLE(2const) PR_SET_DUMPABLE(2const)
PR_SET_DUMPABLE - set the "dumpable" attribute of the calling
process
Standard C library (libc, -lc)
#include <linux/prctl.h> /* Definition of PR_* constants */
#include <sys/prctl.h>
int prctl(PR_SET_DUMPABLE, long dumpable);
Set the state of the "dumpable" attribute, which determines
whether core dumps are produced for the calling process upon
delivery of a signal whose default behavior is to produce a core
dump.
dumpable must be either 0L (SUID_DUMP_DISABLE, process is not
dumpable) or 1L (SUID_DUMP_USER, process is dumpable).
Normally, the "dumpable" attribute is set to 1. However, it is
reset to the current value contained in the file /proc/sys/fs/
suid_dumpable (which by default has the value 0), in the following
circumstances:
• The process's effective user or group ID is changed.
• The process's filesystem user or group ID is changed (see
credentials(7)).
• The process executes (execve(2)) a set-user-ID or set-group-ID
program, resulting in a change of either the effective user ID
or the effective group ID.
• The process executes (execve(2)) a program that has file
capabilities (see capabilities(7)), but only if the permitted
capabilities gained exceed those already permitted for the
process.
Processes that are not dumpable can not be attached via ptrace(2)
PTRACE_ATTACH; see ptrace(2) for further details.
If a process is not dumpable, the ownership of files in the
process's /proc/pid directory is affected as described in
proc_pid(5).
On success, 0 is returned. On error, -1 is returned, and errno is
set to indicate the error.
EINVAL arg2 is neither SUID_DUMP_DISABLE nor SUID_DUMP_USER.
/proc/sys/fs/suid_dumpable
/proc/pid/
Linux.
Linux 2.3.20.
Between Linux 2.6.13 and Linux 2.6.17, the value 2L was also
permitted, which caused any binary which normally would not be
dumped to be dumped readable by root only; for security reasons,
this feature has been removed. (See also the description of
/proc/sys/fs/suid_dumpable in proc_sys_fs(5).)
prctl(2), PR_SET_DUMPABLE(2const)
This page is part of the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
the project can be found at
⟨https://www.kernel.org/doc/man-pages/⟩. If you have a bug report
for this manual page, see
⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
This page was obtained from the tarball man-pages-6.15.tar.gz
fetched from
⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
2025-08-11. If you discover any rendering problems in this HTML
version of the page, or you believe there is a better or more up-
to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not
part of the original manual page), send a mail to
[email protected]
Linux man-pages 6.15 2025-05-17 PR_SET_DUMPABLE(2const)
Pages that refer to this page: prctl(2), PR_GET_DUMPABLE(2const), PR_SET_DUMPABLE(2const)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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