diff options
Diffstat (limited to 'lib/libc/compat-43/setreuid.c')
-rw-r--r-- | lib/libc/compat-43/setreuid.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/lib/libc/compat-43/setreuid.c b/lib/libc/compat-43/setreuid.c new file mode 100644 index 0000000..4031681 --- /dev/null +++ b/lib/libc/compat-43/setreuid.c @@ -0,0 +1,62 @@ +/* + * Copyright (c) 1992, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#if defined(LIBC_SCCS) && !defined(lint) +static char sccsid[] = "@(#)setreuid.c 8.1 (Berkeley) 6/2/93"; +#endif /* LIBC_SCCS and not lint */ + +#include <sys/types.h> +#include <errno.h> + +int +setreuid(ruid, euid) + uid_t ruid, euid; +{ + static uid_t saveduid = -1; + + if (saveduid == -1) + saveduid = geteuid(); + /* + * we assume that the intent here is to be able to + * get back ruid priviledge. So we make sure that + * we will be able to do so, but do not actually + * set the ruid. + */ + if (ruid != -1 && ruid != getuid() && ruid != saveduid) { + errno = EPERM; + return (-1); + } + if (euid != -1 && seteuid(euid) < 0) + return (-1); + return (0); +} |