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#include <u.h>
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#include <libc.h>
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char*
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getenv(char *name)
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{
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	int r, f;
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	long s;
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	char *ans;
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	char *p, *ep, ename[100];
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	if(strchr(name, '/') != nil)
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		return nil;
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	snprint(ename, sizeof ename, "/env/%s", name);
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	if(strcmp(ename+5, name) != 0)
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		return nil;
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	f = open(ename, OREAD);
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	if(f < 0)
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		return 0;
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	s = seek(f, 0, 2);
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	ans = malloc(s+1);
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	if(ans) {
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		setmalloctag(ans, getcallerpc(&name));
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		seek(f, 0, 0);
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		r = read(f, ans, s);
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		if(r >= 0) {
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			ep = ans + s - 1;
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			for(p = ans; p < ep; p++)
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				if(*p == '\0')
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					*p = ' ';
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			ans[s] = '\0';
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		}
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	}
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	close(f);
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	return ans;
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}