Listing 1. Enabling and Disabling Accounting to a File
/* pa.c
* Linux demonstration program.
* Logs process accounting information to a
* file specified on the command line.
* If no filename is specified, process
* accounting is switched off.
*/
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
int
main (int argc, char **argv)
{
int rc;
if (argc == 1) /* No arguments - switch off */
{
printf("Turning off process accounting.\n");
if ( (rc = acct (NULL)) )
{
if (errno == ENOSYS)
{
printf
("It appears your kernel does not"
" include accounting support\n");
}
perror("Problem turning off accounting");
return rc;
}
}
else /* cmd line arg - switch accounting on */
{
printf
("Attempting to log to file %s.\n",
argv[1]);
rc =
creat (argv[1],
S_IRWXU | S_IRGRP | S_IROTH);
if (rc == -1)
{
perror("Problem creating log file");
return rc;
}
if ( (rc = acct (argv[1])) )
{
perror("Problem in acct() call");
return rc;
}
}
return 0;
}
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