1  /*
       2   * Check decoding of getpriority and setpriority syscalls.
       3   *
       4   * Copyright (c) 2016-2021 The strace developers.
       5   * All rights reserved.
       6   *
       7   * SPDX-License-Identifier: GPL-2.0-or-later
       8   */
       9  
      10  #include "tests.h"
      11  #include "scno.h"
      12  #include "pidns.h"
      13  
      14  #include <stdio.h>
      15  #include <sys/resource.h>
      16  #include <unistd.h>
      17  
      18  int
      19  main(void)
      20  {
      21  	PIDNS_TEST_INIT;
      22  
      23  	const int pid = getpid();
      24  	const int pgid = getpgid(0);
      25  
      26  	long rc = syscall(__NR_getpriority, PRIO_PROCESS,
      27  			  F8ILL_KULONG_MASK | pid);
      28  	pidns_print_leader();
      29  	printf("getpriority(PRIO_PROCESS, %d%s) = %ld\n",
      30  		pid, pidns_pid2str(PT_TGID), rc);
      31  
      32  	rc = syscall(__NR_setpriority, PRIO_PROCESS,
      33  		     F8ILL_KULONG_MASK | pid, F8ILL_KULONG_MASK);
      34  	pidns_print_leader();
      35  	printf("setpriority(PRIO_PROCESS, %d%s, 0) = %s\n",
      36  		pid, pidns_pid2str(PT_TGID), sprintrc(rc));
      37  
      38  	rc = syscall(__NR_getpriority, PRIO_PGRP,
      39  			  F8ILL_KULONG_MASK | pgid);
      40  	pidns_print_leader();
      41  	printf("getpriority(PRIO_PGRP, %d%s) = %ld\n",
      42  		pgid, pidns_pid2str(PT_PGID), rc);
      43  
      44  	pidns_print_leader();
      45  	puts("+++ exited with 0 +++");
      46  	return 0;
      47  }