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sched_getaffinity(3): more compatibility with Linux

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Report EINVAL instead of EDEADLK when impossible cpu mask is set.

Noted by:	dchagin
Reviewed by:	dchagin (previous version), markj
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D35045
This commit is contained in:
Konstantin Belousov 2022-04-25 01:10:18 +03:00
parent 0a736f0a6a
commit 67fc95025c
1 changed files with 7 additions and 2 deletions
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9
lib/libc/gen/sched_setaffinity.c
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@ -34,6 +34,7 @@ int
sched_setaffinity(pid_t pid, size_t cpusetsz, const cpuset_t *cpuset)
{
cpuset_t c;
int error;
if (cpusetsz > sizeof(cpuset_t)) {
errno = EINVAL;
@ -42,6 +43,10 @@ sched_setaffinity(pid_t pid, size_t cpusetsz, const cpuset_t *cpuset)
memset(&c, 0, sizeof(c));
memcpy(&c, cpuset, cpusetsz);
}
return (cpuset_setaffinity(CPU_LEVEL_WHICH, CPU_WHICH_PID,
pid == 0 ? -1 : pid, sizeof(cpuset_t), &c));
error = cpuset_setaffinity(CPU_LEVEL_WHICH, CPU_WHICH_PID,
pid == 0 ? -1 : pid, sizeof(cpuset_t), &c);
if (error == -1 && errno == EDEADLK)
errno = EINVAL;
return (error);
}