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Diffstat (limited to 'Src/openssh_bsd_setres_id.c')
| -rw-r--r-- | Src/openssh_bsd_setres_id.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/Src/openssh_bsd_setres_id.c b/Src/openssh_bsd_setres_id.c new file mode 100644 index 000000000..65e91a40c --- /dev/null +++ b/Src/openssh_bsd_setres_id.c @@ -0,0 +1,129 @@ +/* + * Copyright (c) 2012 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. + */ +/* + * openssh_bsd_setres_id.c - setresuid() and setresgid() wrappers + * + * This file is part of zsh, the Z shell. + * + * It is based on the file openbsd-compat/bsd-setres_id.c in OpenSSH 7.9p1, + * which is subject to the copyright notice above. The zsh modifications are + * licensed as follows: + * + * Copyright (c) 2019 Daniel Shahaf + * All rights reserved. + * + * Permission is hereby granted, without written agreement and without + * license or royalty fees, to use, copy, modify, and distribute this + * software and to distribute modified versions of this software for any + * purpose, provided that the above copyright notice and the following + * two paragraphs appear in all copies of this software. + * + * In no event shall Daniel Shahaf or the Zsh Development Group be liable + * to any party for direct, indirect, special, incidental, or consequential + * damages arising out of the use of this software and its documentation, + * even if Daniel Shahaf and the Zsh Development Group have been advised of + * the possibility of such damage. + * + * Daniel Shahaf and the Zsh Development Group specifically disclaim any + * warranties, including, but not limited to, the implied warranties of + * merchantability and fitness for a particular purpose. The software + * provided hereunder is on an "as is" basis, and Daniel Shahaf and the + * Zsh Development Group have no obligation to provide maintenance, + * support, updates, enhancements, or modifications. + * + */ + + +#include <sys/types.h> + +#include <stdarg.h> +#include <unistd.h> +#include <string.h> + +#include "zsh.mdh" + +#if defined(ZSH_IMPLEMENT_SETRESGID) || defined(BROKEN_SETRESGID) +int +setresgid(gid_t rgid, gid_t egid, gid_t sgid) +{ + int ret = 0, saved_errno; + + if (rgid != sgid) { + errno = ENOSYS; + return -1; + } +#if defined(ZSH_HAVE_NATIVE_SETREGID) && !defined(BROKEN_SETREGID) + if (setregid(rgid, egid) < 0) { + saved_errno = errno; + zwarnnam("setregid", "to gid %L: %e", (long)rgid, errno); + errno = saved_errno; + ret = -1; + } +#else + if (setegid(egid) < 0) { + saved_errno = errno; + zwarnnam("setegid", "to gid %L: %e", (long)(unsigned int)egid, errno); + errno = saved_errno; + ret = -1; + } + if (setgid(rgid) < 0) { + saved_errno = errno; + zwarnnam("setgid", "to gid %L: %e", (long)rgid, errno); + errno = saved_errno; + ret = -1; + } +#endif + return ret; +} +#endif + +#if defined(ZSH_IMPLEMENT_SETRESUID) || defined(BROKEN_SETRESUID) +int +setresuid(uid_t ruid, uid_t euid, uid_t suid) +{ + int ret = 0, saved_errno; + + if (ruid != suid) { + errno = ENOSYS; + return -1; + } +#if defined(ZSH_HAVE_NATIVE_SETREUID) && !defined(BROKEN_SETREUID) + if (setreuid(ruid, euid) < 0) { + saved_errno = errno; + zwarnnam("setreuid", "to uid %L: %e", (long)ruid, errno); + errno = saved_errno; + ret = -1; + } +#else + +# ifndef SETEUID_BREAKS_SETUID + if (seteuid(euid) < 0) { + saved_errno = errno; + zwarnnam("seteuid", "to uid %L: %e", (long)euid, errno); + errno = saved_errno; + ret = -1; + } +# endif + if (setuid(ruid) < 0) { + saved_errno = errno; + zwarnnam("setuid", "to uid %L: %e", (long)ruid, errno); + errno = saved_errno; + ret = -1; + } +#endif + return ret; +} +#endif |