diff options
Diffstat (limited to 'crypto/kerberosIV/lib/kafs/afssys.c')
| -rw-r--r-- | crypto/kerberosIV/lib/kafs/afssys.c | 398 |
1 files changed, 0 insertions, 398 deletions
diff --git a/crypto/kerberosIV/lib/kafs/afssys.c b/crypto/kerberosIV/lib/kafs/afssys.c deleted file mode 100644 index a45f445..0000000 --- a/crypto/kerberosIV/lib/kafs/afssys.c +++ /dev/null @@ -1,398 +0,0 @@ -/* - * Copyright (c) 1995, 1996, 1997, 1998, 1999 Kungliga Tekniska Högskolan - * (Royal Institute of Technology, Stockholm, Sweden). - * 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. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE 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. - */ - -#include "kafs_locl.h" - -RCSID("$Id: afssys.c,v 1.65.2.1 2000/06/23 03:27:23 assar Exp $"); - -int _kafs_debug; /* this should be done in a better way */ - -#define NO_ENTRY_POINT 0 -#define SINGLE_ENTRY_POINT 1 -#define MULTIPLE_ENTRY_POINT 2 -#define SINGLE_ENTRY_POINT2 3 -#define SINGLE_ENTRY_POINT3 4 -#define AIX_ENTRY_POINTS 5 -#define UNKNOWN_ENTRY_POINT 6 -static int afs_entry_point = UNKNOWN_ENTRY_POINT; -static int afs_syscalls[2]; - -/* Magic to get AIX syscalls to work */ -#ifdef _AIX - -static int (*Pioctl)(char*, int, struct ViceIoctl*, int); -static int (*Setpag)(void); - -#include "dlfcn.h" - -/* - * - */ - -static int -try_aix(void) -{ -#ifdef STATIC_AFS_SYSCALLS - Pioctl = aix_pioctl; - Setpag = aix_setpag; -#else - void *ptr; - char path[MaxPathLen], *p; - /* - * If we are root or running setuid don't trust AFSLIBPATH! - */ - if (getuid() != 0 && !issuid() && (p = getenv("AFSLIBPATH")) != NULL) - strlcpy(path, p, sizeof(path)); - else - snprintf(path, sizeof(path), "%s/afslib.so", LIBDIR); - - ptr = dlopen(path, RTLD_NOW); - if(ptr == NULL) { - if(_kafs_debug) { - if(errno == ENOEXEC && (p = dlerror()) != NULL) - fprintf(stderr, "dlopen(%s): %s\n", path, p); - else if (errno != ENOENT) - fprintf(stderr, "dlopen(%s): %s\n", path, strerror(errno)); - } - return 1; - } - Setpag = (int (*)(void))dlsym(ptr, "aix_setpag"); - Pioctl = (int (*)(char*, int, - struct ViceIoctl*, int))dlsym(ptr, "aix_pioctl"); -#endif - afs_entry_point = AIX_ENTRY_POINTS; - return 0; -} -#endif /* _AIX */ - -/* - * This probably only works under Solaris and could get confused if - * there's a /etc/name_to_sysnum file. - */ - -#define _PATH_ETC_NAME_TO_SYSNUM "/etc/name_to_sysnum" - -static int -map_syscall_name_to_number (const char *str, int *res) -{ - FILE *f; - char buf[256]; - size_t str_len = strlen (str); - - f = fopen (_PATH_ETC_NAME_TO_SYSNUM, "r"); - if (f == NULL) - return -1; - while (fgets (buf, sizeof(buf), f) != NULL) { - if (buf[0] == '#') - continue; - - if (strncmp (str, buf, str_len) == 0) { - char *begptr = buf + str_len; - char *endptr; - long val = strtol (begptr, &endptr, 0); - - if (val != 0 && endptr != begptr) { - fclose (f); - *res = val; - return 0; - } - } - } - fclose (f); - return -1; -} - -int -k_pioctl(char *a_path, - int o_opcode, - struct ViceIoctl *a_paramsP, - int a_followSymlinks) -{ -#ifndef NO_AFS - switch(afs_entry_point){ -#if defined(AFS_SYSCALL) || defined(AFS_SYSCALL2) || defined(AFS_SYSCALL3) - case SINGLE_ENTRY_POINT: - case SINGLE_ENTRY_POINT2: - case SINGLE_ENTRY_POINT3: - return syscall(afs_syscalls[0], AFSCALL_PIOCTL, - a_path, o_opcode, a_paramsP, a_followSymlinks); -#endif -#if defined(AFS_PIOCTL) - case MULTIPLE_ENTRY_POINT: - return syscall(afs_syscalls[0], - a_path, o_opcode, a_paramsP, a_followSymlinks); -#endif -#ifdef _AIX - case AIX_ENTRY_POINTS: - return Pioctl(a_path, o_opcode, a_paramsP, a_followSymlinks); -#endif - } - - errno = ENOSYS; -#ifdef SIGSYS - kill(getpid(), SIGSYS); /* You loose! */ -#endif -#endif /* NO_AFS */ - return -1; -} - -int -k_afs_cell_of_file(const char *path, char *cell, int len) -{ - struct ViceIoctl parms; - parms.in = NULL; - parms.in_size = 0; - parms.out = cell; - parms.out_size = len; - return k_pioctl((char*)path, VIOC_FILE_CELL_NAME, &parms, 1); -} - -int -k_unlog(void) -{ - struct ViceIoctl parms; - memset(&parms, 0, sizeof(parms)); - return k_pioctl(0, VIOCUNLOG, &parms, 0); -} - -int -k_setpag(void) -{ -#ifndef NO_AFS - switch(afs_entry_point){ -#if defined(AFS_SYSCALL) || defined(AFS_SYSCALL2) || defined(AFS_SYSCALL3) - case SINGLE_ENTRY_POINT: - case SINGLE_ENTRY_POINT2: - case SINGLE_ENTRY_POINT3: - return syscall(afs_syscalls[0], AFSCALL_SETPAG); -#endif -#if defined(AFS_PIOCTL) - case MULTIPLE_ENTRY_POINT: - return syscall(afs_syscalls[1]); -#endif -#ifdef _AIX - case AIX_ENTRY_POINTS: - return Setpag(); -#endif - } - - errno = ENOSYS; -#ifdef SIGSYS - kill(getpid(), SIGSYS); /* You loose! */ -#endif -#endif /* NO_AFS */ - return -1; -} - -static jmp_buf catch_SIGSYS; - -#ifdef SIGSYS - -static RETSIGTYPE -SIGSYS_handler(int sig) -{ - errno = 0; - signal(SIGSYS, SIGSYS_handler); /* Need to reinstall handler on SYSV */ - longjmp(catch_SIGSYS, 1); -} - -#endif - -/* - * Try to see if `syscall' is a pioctl. Return 0 iff succesful. - */ - -#if defined(AFS_SYSCALL) || defined(AFS_SYSCALL2) || defined(AFS_SYSCALL3) -static int -try_one (int syscall_num) -{ - struct ViceIoctl parms; - memset(&parms, 0, sizeof(parms)); - - if (setjmp(catch_SIGSYS) == 0) { - syscall(syscall_num, AFSCALL_PIOCTL, - 0, VIOCSETTOK, &parms, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0); - if (errno == EINVAL) { - afs_entry_point = SINGLE_ENTRY_POINT; - afs_syscalls[0] = syscall_num; - return 0; - } - } - return 1; -} -#endif - -/* - * Try to see if `syscall_pioctl' is a pioctl syscall. Return 0 iff - * succesful. - * - */ - -#ifdef AFS_PIOCTL -static int -try_two (int syscall_pioctl, int syscall_setpag) -{ - struct ViceIoctl parms; - memset(&parms, 0, sizeof(parms)); - - if (setjmp(catch_SIGSYS) == 0) { - syscall(syscall_pioctl, - 0, VIOCSETTOK, &parms, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0); - if (errno == EINVAL) { - afs_entry_point = MULTIPLE_ENTRY_POINT; - afs_syscalls[0] = syscall_pioctl; - afs_syscalls[1] = syscall_setpag; - return 0; - } - } - return 1; -} -#endif - -int -k_hasafs(void) -{ -#if !defined(NO_AFS) && defined(SIGSYS) - RETSIGTYPE (*saved_func)(); -#endif - int saved_errno; - char *env = getenv ("AFS_SYSCALL"); - - /* - * Already checked presence of AFS syscalls? - */ - if (afs_entry_point != UNKNOWN_ENTRY_POINT) - return afs_entry_point != NO_ENTRY_POINT; - - /* - * Probe kernel for AFS specific syscalls, - * they (currently) come in two flavors. - * If the syscall is absent we recive a SIGSYS. - */ - afs_entry_point = NO_ENTRY_POINT; - - saved_errno = errno; -#ifndef NO_AFS -#ifdef SIGSYS - saved_func = signal(SIGSYS, SIGSYS_handler); -#endif - -#if defined(AFS_SYSCALL) || defined(AFS_SYSCALL2) || defined(AFS_SYSCALL3) - { - int tmp; - - if (env != NULL) { - if (sscanf (env, "%d", &tmp) == 1) { - if (try_one (tmp) == 0) - goto done; - } else { - char *end = NULL; - char *p; - char *s = strdup (env); - - if (s != NULL) { - for (p = strtok_r (s, ",", &end); - p != NULL; - p = strtok_r (NULL, ",", &end)) { - if (map_syscall_name_to_number (p, &tmp) == 0) - if (try_one (tmp) == 0) { - free (s); - goto done; - } - } - free (s); - } - } - } - } -#endif /* AFS_SYSCALL || AFS_SYSCALL2 || AFS_SYSCALL3 */ - -#ifdef AFS_SYSCALL - if (try_one (AFS_SYSCALL) == 0) - goto done; -#endif /* AFS_SYSCALL */ - -#ifdef AFS_PIOCTL - { - int tmp[2]; - - if (env != NULL && sscanf (env, "%d%d", &tmp[0], &tmp[1]) == 2) - if (try_two (tmp[0], tmp[1]) == 2) - goto done; - } -#endif /* AFS_PIOCTL */ - -#ifdef AFS_PIOCTL - if (try_two (AFS_PIOCTL, AFS_SETPAG) == 0) - goto done; -#endif /* AFS_PIOCTL */ - -#ifdef AFS_SYSCALL2 - if (try_one (AFS_SYSCALL2) == 0) - goto done; -#endif /* AFS_SYSCALL2 */ - -#ifdef AFS_SYSCALL3 - if (try_one (AFS_SYSCALL3) == 0) - goto done; -#endif /* AFS_SYSCALL3 */ - -#ifdef _AIX -#if 0 - if (env != NULL) { - char *pos = NULL; - char *pioctl_name; - char *setpag_name; - - pioctl_name = strtok_r (env, ", \t", &pos); - if (pioctl_name != NULL) { - setpag_name = strtok_r (NULL, ", \t", &pos); - if (setpag_name != NULL) - if (try_aix (pioctl_name, setpag_name) == 0) - goto done; - } - } -#endif - - if(try_aix() == 0) - goto done; -#endif - -done: -#ifdef SIGSYS - signal(SIGSYS, saved_func); -#endif -#endif /* NO_AFS */ - errno = saved_errno; - return afs_entry_point != NO_ENTRY_POINT; -} |
