43 lines
1.4 KiB
C++
43 lines
1.4 KiB
C++
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// Copyright 2018 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/resource.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <unistd.h>
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int main(int argc, char** argv, char** envp) {
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errno = 0;
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int prio = getpriority(PRIO_PROCESS, getpid());
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// NOTE: getpriority() can legitimately return negative values
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// in the range [-20, 0). If errno is set, exit with a value that
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// could not be reached by a valid priority. Valid exit values
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// for the test are in the range [1, 40], so we'll use 0.
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if (errno != 0) {
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printf("getpriority() failed with errno = %d\n", errno);
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exit(0);
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}
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// Used by test to verify priority is being maintained through
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// calls to execve(). Since prio should always be in the range
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// [-20, 19], we offset by 20 so as not to have negative exit codes.
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exit(20 - prio);
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return 0;
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}
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