coreutils/lib/setenv.h

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#ifndef SETENV_H
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# define SETENV_H 1
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# undef __P
# if defined (__STDC__) && __STDC__
# define __P(x) x
# else
# define __P(x) ()
# endif
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int
setenv __P ((const char *name, const char *value, int replace));
void
unsetenv __P ((const char *name));
#endif /* SETENV_H */