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Disable the syscall on systems that don't have it.
Got a report in #397 that htop runs in NetBSD masquerading as Linux and using a compatibility /proc (like we used to in FreeBSD) and that it builds fine apart from this syscall.
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@ -268,13 +268,20 @@ io_priority = (cpu_nice + 20) / 5. -- From ionice(1) man page
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#define LinuxProcess_effectiveIOPriority(p_) (IOPriority_class(p_->ioPriority) == IOPRIO_CLASS_NONE ? IOPriority_tuple(IOPRIO_CLASS_BE, (p_->super.nice + 20) / 5) : p_->ioPriority)
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IOPriority LinuxProcess_updateIOPriority(LinuxProcess* this) {
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IOPriority ioprio = syscall(SYS_ioprio_get, IOPRIO_WHO_PROCESS, this->super.pid);
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IOPriority ioprio = 0;
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// Other OSes masquerading as Linux (NetBSD?) don't have this syscall
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#ifdef SYS_ioprio_get
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ioprio = syscall(SYS_ioprio_get, IOPRIO_WHO_PROCESS, this->super.pid);
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#endif
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this->ioPriority = ioprio;
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return ioprio;
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}
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bool LinuxProcess_setIOPriority(LinuxProcess* this, IOPriority ioprio) {
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// Other OSes masquerading as Linux (NetBSD?) don't have this syscall
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#ifdef SYS_ioprio_set
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syscall(SYS_ioprio_set, IOPRIO_WHO_PROCESS, this->super.pid, ioprio);
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#endif
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return (LinuxProcess_updateIOPriority(this) == ioprio);
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}
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