forked from lix-project/lix
* Use setreuid if setresuid is not available.
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@ -238,11 +238,15 @@ AM_CONDITIONAL(INIT_STATE, test "$init_state" = "yes")
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# Setuid installations.
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AC_CHECK_FUNC(setresuid, [HAVE_SETRESUID=1], [HAVE_SETRESUID=])
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AM_CONDITIONAL(HAVE_SETRESUID, test "$HAVE_SETRESUID" = "1")
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if test "$HAVE_SETRESUID" = "1"; then
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AC_DEFINE(HAVE_SETRESUID, 1, [whether we have setresuid()])
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fi
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AC_CHECK_FUNC(setreuid, [HAVE_SETREUID=1], [HAVE_SETREUID=])
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if test "$HAVE_SETREUID" = "1"; then
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AC_DEFINE(HAVE_SETREUID, 1, [whether we have setreuid()])
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fi
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# This is needed if ATerm, Berkeley DB or bzip2 are static libraries,
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# and the Nix libraries are dynamic.
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@ -244,13 +244,19 @@ static void setuidInit()
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could also modify the Nix executables (say, replace them by a
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Trojan horse), so the problem is already there. */
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#if HAVE_SETRESUID
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setresuid(nixUid, nixUid, nixUid);
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setresgid(nixGid, nixGid, nixGid);
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#else
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#if 0 && HAVE_SETRESUID
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if (setresuid(nixUid, nixUid, nixUid)) abort();
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if (setresgid(nixGid, nixGid, nixGid)) abort();
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#elif HAVE_SETREUID
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/* Note: doesn't set saved uid/gid! */
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setuid(nixUid);
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setgid(nixGid);
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fprintf(stderr, "warning: cannot set saved uid\n");
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if (setreuid(nixUid, nixUid)) abort();
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if (setregid(nixGid, nixGid)) abort();
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#else
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/* Note: doesn't set real and saved uid/gid! */
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fprintf(stderr, "warning: cannot set real and saved uids\n");
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if (setuid(nixUid)) abort();
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if (setgid(nixGid)) abort();
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#endif
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}
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