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/* wait.c -- functions for getting wait status values.
Copyright 2011 The Go Authors. All rights reserved.
Use of this source code is governed by a BSD-style
license that can be found in the LICENSE file.
We use C code to extract the wait status so that we can easily be
OS-independent. */
#include <stdint.h>
#include <sys/wait.h>
extern _Bool Exited (uint32_t *w)
__asm__ ("syscall.Exited.N18_syscall.WaitStatus");
_Bool
Exited (uint32_t *w)
{
return WIFEXITED (*w) != 0;
}
extern _Bool Signaled (uint32_t *w)
__asm__ ("syscall.Signaled.N18_syscall.WaitStatus");
_Bool
Signaled (uint32_t *w)
{
return WIFSIGNALED (*w) != 0;
}
extern _Bool Stopped (uint32_t *w)
__asm__ ("syscall.Stopped.N18_syscall.WaitStatus");
_Bool
Stopped (uint32_t *w)
{
return WIFSTOPPED (*w) != 0;
}
extern _Bool Continued (uint32_t *w)
__asm__ ("syscall.Continued.N18_syscall.WaitStatus");
_Bool
Continued (uint32_t *w)
{
return WIFCONTINUED (*w) != 0;
}
extern _Bool CoreDump (uint32_t *w)
__asm__ ("syscall.CoreDump.N18_syscall.WaitStatus");
_Bool
CoreDump (uint32_t *w)
{
return WCOREDUMP (*w) != 0;
}
extern int ExitStatus (uint32_t *w)
__asm__ ("syscall.ExitStatus.N18_syscall.WaitStatus");
int
ExitStatus (uint32_t *w)
{
if (!WIFEXITED (*w))
return -1;
return WEXITSTATUS (*w);
}
extern int Signal (uint32_t *w)
__asm__ ("syscall.Signal.N18_syscall.WaitStatus");
int
Signal (uint32_t *w)
{
if (!WIFSIGNALED (*w))
return -1;
return WTERMSIG (*w);
}
extern int StopSignal (uint32_t *w)
__asm__ ("syscall.StopSignal.N18_syscall.WaitStatus");
int
StopSignal (uint32_t *w)
{
if (!WIFSTOPPED (*w))
return -1;
return WSTOPSIG (*w);
}
extern int TrapCause (uint32_t *w)
__asm__ ("syscall.TrapCause.N18_syscall.WaitStatus");
int
TrapCause (uint32_t *w __attribute__ ((unused)))
{
#ifndef __linux__
return -1;
#else
if (!WIFSTOPPED (*w) || WSTOPSIG (*w) != SIGTRAP)
return -1;
return *w >> 16;
#endif
}
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