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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.
This commit is contained in:
Hisham 2016-02-14 12:05:35 -02:00
parent ae823c375a
commit 35657208d7
1 changed files with 8 additions and 1 deletions
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9
linux/LinuxProcess.c
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@ -268,13 +268,20 @@ io_priority = (cpu_nice + 20) / 5. -- From ionice(1) man page
#define LinuxProcess_effectiveIOPriority(p_) (IOPriority_class(p_->ioPriority) == IOPRIO_CLASS_NONE ? IOPriority_tuple(IOPRIO_CLASS_BE, (p_->super.nice + 20) / 5) : p_->ioPriority) #define LinuxProcess_effectiveIOPriority(p_) (IOPriority_class(p_->ioPriority) == IOPRIO_CLASS_NONE ? IOPriority_tuple(IOPRIO_CLASS_BE, (p_->super.nice + 20) / 5) : p_->ioPriority)
IOPriority LinuxProcess_updateIOPriority(LinuxProcess* this) { IOPriority LinuxProcess_updateIOPriority(LinuxProcess* this) {
IOPriority ioprio = syscall(SYS_ioprio_get, IOPRIO_WHO_PROCESS, this->super.pid); IOPriority ioprio = 0;
// Other OSes masquerading as Linux (NetBSD?) don't have this syscall
#ifdef SYS_ioprio_get
ioprio = syscall(SYS_ioprio_get, IOPRIO_WHO_PROCESS, this->super.pid);
#endif
this->ioPriority = ioprio; this->ioPriority = ioprio;
return ioprio; return ioprio;
} }
bool LinuxProcess_setIOPriority(LinuxProcess* this, IOPriority ioprio) { bool LinuxProcess_setIOPriority(LinuxProcess* this, IOPriority ioprio) {
// Other OSes masquerading as Linux (NetBSD?) don't have this syscall
#ifdef SYS_ioprio_set
syscall(SYS_ioprio_set, IOPRIO_WHO_PROCESS, this->super.pid, ioprio); syscall(SYS_ioprio_set, IOPRIO_WHO_PROCESS, this->super.pid, ioprio);
#endif
return (LinuxProcess_updateIOPriority(this) == ioprio); return (LinuxProcess_updateIOPriority(this) == ioprio);
} }