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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | STANDARDS | HISTORY | NOTES | SEE ALSO | COLOPHON |
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acct(2) System Calls Manual acct(2)
acct - switch process accounting on or off
Standard C library (libc, -lc)
#include <unistd.h>
int acct(const char *_Nullable path);
Feature Test Macro Requirements for glibc (see
feature_test_macros(7)):
acct():
Since glibc 2.21:
_DEFAULT_SOURCE
In glibc 2.19 and 2.20:
_DEFAULT_SOURCE || (_XOPEN_SOURCE && _XOPEN_SOURCE < 500)
Up to and including glibc 2.19:
_BSD_SOURCE || (_XOPEN_SOURCE && _XOPEN_SOURCE < 500)
The acct() system call enables or disables process accounting. If
called with the pathname of an existing file as its argument,
accounting is turned on, and records for each terminating process
are appended to the file as it terminates. An argument of NULL
causes accounting to be turned off.
On success, zero is returned. On error, -1 is returned, and errno
is set to indicate the error.
EACCES Write permission is denied for the specified file, or
search permission is denied for one of the directories in
the path prefix of path (see also path_resolution(7)), or
path is not a regular file.
EFAULT path points outside your accessible address space.
EIO Error writing to the file path.
EISDIR path is a directory.
ELOOP Too many symbolic links were encountered in resolving path.
ENAMETOOLONG
path was too long.
ENFILE The system-wide limit on the total number of open files has
been reached.
ENOENT The specified path does not exist.
ENOMEM Out of memory.
ENOSYS BSD process accounting has not been enabled when the
operating system kernel was compiled. The kernel
configuration parameter controlling this feature is
CONFIG_BSD_PROCESS_ACCT.
ENOTDIR
A component used as a directory in path is not in fact a
directory.
EPERM The calling process has insufficient privilege to enable
process accounting. On Linux, the CAP_SYS_PACCT capability
is required.
EROFS path refers to a file on a read-only filesystem.
EUSERS There are no more free file structures or we ran out of
memory.
None.
SVr4, 4.3BSD.
No accounting is produced for programs running when a system crash
occurs. In particular, nonterminating processes are never
accounted for.
The structure of the records written to the accounting file is
described in acct(5).
acct(5)
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
man-pages@man7.org
Linux man-pages 6.15 2025-05-17 acct(2)
Pages that refer to this page: syscalls(2), acct(5), capabilities(7), feature_test_macros(7)
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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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