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