43 lines
1.2 KiB
C
43 lines
1.2 KiB
C
#ifndef _WAIT_H
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# define _WAIT_H
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# define WNOHANG 1
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# define WUNTRACED 2
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/*
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* Unlike the atrocity that BSD ended up using, we do not have a "union
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* wait," although I could probably implement one. Given the code I
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* sometimes end up porting, it might be a good thing. Anyway, the
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* format of a stat thingy, filled in by the wait*() routines, is:
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* struct {
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* int filler:16;
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* union {
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* struct stopped {
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* int signo:8;
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* int o177:8; // will be 0177
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* };
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* struct exited {
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* int retval:8;
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* int zero:8; // 0, obviously 8-)
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* };
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* struct termed {
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* int zero:8; // zeroes
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* int corep:1; // was there a core file?
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* int signo:7; // what?! Only 127 signals?!
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* };
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* int value:16;
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* };
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* };
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*
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* Braver souls than I can turn that into a union wait, if desired. Ick.
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*/
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# define WIFEXITED(val) ((val)&0xff)
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# define WEXITSTATUS(val) (((val)>>8)&0xff)
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# define WIFSIGNALED(val) ((val) && !((val)&0xff))
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# define WTERMSIG(val) (((val)>>8)&0x7f)
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# define WIFSTOPPED(val) (((val)&0xff)==0177)
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# define WSTOPSIG(val) (((val)>>8)&0xff)
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#endif /* _SYS_WAIT_H */
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