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add tests and compat for setresuid and setresgid
backport of bd8683d
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/* | ||
* Copyright (c) 2004, 2005 Darren Tucker (dtucker at zip com au). | ||
* | ||
* Permission to use, copy, modify, and distribute this software for any | ||
* purpose with or without fee is hereby granted, provided that the above | ||
* copyright notice and this permission notice appear in all copies. | ||
* | ||
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | ||
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | ||
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | ||
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | ||
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | ||
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | ||
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | ||
*/ | ||
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#include <sys/types.h> | ||
#include <unistd.h> | ||
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int | ||
setresgid(gid_t rgid, gid_t egid, gid_t sgid) | ||
{ | ||
/* this is the only configuration tested */ | ||
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if (rgid != egid || egid != sgid) | ||
return -1; | ||
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if (setregid(rgid, egid) == -1) | ||
return -1; | ||
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return 0; | ||
} |
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/* | ||
* Copyright (c) 2004, 2005 Darren Tucker (dtucker at zip com au). | ||
* | ||
* Permission to use, copy, modify, and distribute this software for any | ||
* purpose with or without fee is hereby granted, provided that the above | ||
* copyright notice and this permission notice appear in all copies. | ||
* | ||
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | ||
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | ||
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | ||
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | ||
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | ||
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | ||
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | ||
*/ | ||
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#include <sys/types.h> | ||
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#include <errno.h> | ||
#include <unistd.h> | ||
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int | ||
setresuid(uid_t ruid, uid_t euid, uid_t suid) | ||
{ | ||
uid_t ouid; | ||
int ret = -1; | ||
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/* Allow only the tested configuration. */ | ||
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if (ruid != euid || euid != suid) { | ||
errno = ENOSYS; | ||
return -1; | ||
} | ||
ouid = getuid(); | ||
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if ((ret = setreuid(euid, euid)) == -1) | ||
return -1; | ||
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/* | ||
* When real, effective and saved uids are the same and we have | ||
* changed uids, sanity check that we cannot restore the old uid. | ||
*/ | ||
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if (ruid == euid && euid == suid && ouid != ruid && | ||
setuid(ouid) != -1 && seteuid(ouid) != -1) { | ||
errno = EINVAL; | ||
return -1; | ||
} | ||
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/* | ||
* Finally, check that the real and effective uids are what we | ||
* expect. | ||
*/ | ||
if (getuid() != ruid || geteuid() != euid) { | ||
errno = EACCES; | ||
return -1; | ||
} | ||
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return ret; | ||
} |
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#include <sys/types.h> | ||
#include <unistd.h> | ||
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int | ||
main(void) | ||
{ | ||
return setresgid(-1, -1, -1) == -1; | ||
} |
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@@ -0,0 +1,8 @@ | ||
#include <sys/types.h> | ||
#include <unistd.h> | ||
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int | ||
main(void) | ||
{ | ||
return setresuid(-1, -1, -1) == -1; | ||
} |