acct - switch process accounting on or off
int acct(const char *filename);
When called with the name of an existing file as argument,
accounting is turned on, records for each terminating pro
cess are appended to filename as it terminates. An argu
ment of NULL causes accounting to be turned off.
On success, zero is returned. On error, -1 is returned,
and errno is set appropriately.
ENOSYS BSD process accounting has not been enabled when
the operating system kernel was compiled. The ker
nel configuration parameter controlling this fea
ture is CONFIG_BSD_PROCESS_ACCT.
ENOMEM Out of memory.
EPERM The calling process has no permission to enable
The argument filename is not a regular file.
EIO Error writing to the file filename.
EUSERS There are no more free file structures or we run
out of memory.
SVr4 (but not POSIX). SVr4 documents EACCES, EBUSY,
EFAULT, ELOOP, ENAMETOOLONG, ENOTDIR, ENOENT, EPERM and
EROFS error conditions, but no ENOSYS.
No accounting is produced for programs running when a
crash occurs. In particular, nonterminating processes are
never accounted for.