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#include <u.h>
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#include <libc.h>
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int
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postnote(int group, int pid, char *note)
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{
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	char file[128];
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	int f, r;
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	switch(group) {
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	case PNPROC:
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		sprint(file, "/proc/%d/note", pid);
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		break;
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	case PNGROUP:
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		sprint(file, "/proc/%d/notepg", pid);
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		break;
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	default:
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		return -1;
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	}
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	f = open(file, OWRITE);
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	if(f < 0)
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		return -1;
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	r = strlen(note);
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	if(write(f, note, r) != r) {
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		close(f);
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		return -1;
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	}
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	close(f);
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	return 0;
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}