/* * Copyright (c) 2004-2005 Todd C. Miller <Todd.Miller@courtesan.com> * * 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. */ #include <config.h> #include <errno.h> #ifndef HAVE_TIMESPEC # include <time.h> #endif #ifdef __STDC__ # include <stdarg.h> #else # include <varargs.h> #endif #include <compat.h> #ifndef lint __unused static const char rcsid[] = "$Sudo: sudo_noexec.c,v 1.5.2.2 2007/06/12 00:56:43 millert Exp $"; #endif /* lint */ /* * Dummy versions of the execve() family of syscalls. We don't need * to stub out all of them, just the ones that correspond to actual * system calls (which varies by OS). Note that it is still possible * to access the real syscalls via the syscall() interface but very * few programs actually do that. */ #ifndef errno extern int errno; #endif #define DUMMY_BODY \ { \ errno = EACCES; \ return(-1); \ } #ifdef __STDC__ #define DUMMY2(fn, t1, t2) \ int \ fn(t1 a1, t2 a2) \ DUMMY_BODY #define DUMMY3(fn, t1, t2, t3) \ int \ fn(t1 a1, t2 a2, t3 a3) \ DUMMY_BODY #define DUMMY_VA(fn, t1, t2) \ int \ fn(t1 a1, t2 a2, ...) \ DUMMY_BODY #else /* !__STDC__ */ #define DUMMY2(fn, t1, t2) \ int \ fn(a1, a2) \ t1 a1; t2 a2; \ DUMMY_BODY #define DUMMY3(fn, t1, t2, t3) \ int \ fn(a1, a2, a3) \ t1 a1; t2 a2; t3 a3; \ DUMMY_BODY #define DUMMY_VA(fn, t1, t2) \ int \ fn(a1, a2, va_alist) \ t1 a1; t2 a2; va_dcl \ DUMMY_BODY #endif /* !__STDC__ */ DUMMY_VA(execl, const char *, const char *) DUMMY_VA(_execl, const char *, const char *) DUMMY_VA(__execl, const char *, const char *) DUMMY_VA(execle, const char *, const char *) DUMMY_VA(_execle, const char *, const char *) DUMMY_VA(__execle, const char *, const char *) DUMMY_VA(execlp, const char *, const char *) DUMMY_VA(_execlp, const char *, const char *) DUMMY_VA(__execlp, const char *, const char *) DUMMY2(execv, const char *, char * const *) DUMMY2(_execv, const char *, char * const *) DUMMY2(__execv, const char *, char * const *) DUMMY2(execvp, const char *, char * const *) DUMMY2(_execvp, const char *, char * const *) DUMMY2(__execvp, const char *, char * const *) DUMMY3(execvP, const char *, const char *, char * const *) DUMMY3(_execvP, const char *, const char *, char * const *) DUMMY3(__execvP, const char *, const char *, char * const *) DUMMY3(execve, const char *, char * const *, char * const *) DUMMY3(_execve, const char *, char * const *, char * const *) DUMMY3(__execve, const char *, char * const *, char * const *) DUMMY3(fexecve, int , char * const *, char * const *) DUMMY3(_fexecve, int , char * const *, char * const *) DUMMY3(__fexecve, int , char * const *, char * const *)