diff options
Diffstat (limited to 'newlib/libc/sys/linux/net/rcmd.c')
-rw-r--r-- | newlib/libc/sys/linux/net/rcmd.c | 885 |
1 files changed, 0 insertions, 885 deletions
diff --git a/newlib/libc/sys/linux/net/rcmd.c b/newlib/libc/sys/linux/net/rcmd.c deleted file mode 100644 index ab3ade89b..000000000 --- a/newlib/libc/sys/linux/net/rcmd.c +++ /dev/null @@ -1,885 +0,0 @@ -/* - * Copyright (C) 1998 WIDE Project. - * 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 project 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 PROJECT 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 PROJECT 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. - */ -/* - * Copyright (c) 1983, 1993, 1994 - * 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. - * 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[] = "@(#)rcmd.c 8.3 (Berkeley) 3/26/94"; -#endif /* LIBC_SCCS and not lint */ - -#include <sys/param.h> -#include <sys/poll.h> -#include <sys/socket.h> -#include <sys/stat.h> - -#include <netinet/in.h> -#include <arpa/inet.h> - -#include <alloca.h> -#include <signal.h> -#include <fcntl.h> -#include <netdb.h> -#include <unistd.h> -#include <pwd.h> -#include <errno.h> -#include <stdio.h> -#include <stdio_ext.h> -#include <ctype.h> -#include <string.h> -#include <libintl.h> -#include <stdlib.h> -#include <wchar.h> -#include <sys/uio.h> - -#include "local.h" - - -int __ivaliduser (FILE *, u_int32_t, const char *, const char *); -static int __validuser2_sa (FILE *, struct sockaddr *, size_t, - const char *, const char *, const char *); -static int ruserok2_sa (struct sockaddr *ra, size_t ralen, - int superuser, const char *ruser, - const char *luser, const char *rhost); -static int ruserok_sa (struct sockaddr *ra, size_t ralen, - int superuser, const char *ruser, - const char *luser); -int iruserok_af (const void *raddr, int superuser, const char *ruser, - const char *luser, sa_family_t af); -int iruserok (u_int32_t raddr, int superuser, const char *ruser, - const char *luser); - -libc_hidden_proto (iruserok_af) - -libc_freeres_ptr(static char *ahostbuf); - -int -rcmd_af(ahost, rport, locuser, remuser, cmd, fd2p, af) - char **ahost; - u_short rport; - const char *locuser, *remuser, *cmd; - int *fd2p; - sa_family_t af; -{ - char paddr[INET6_ADDRSTRLEN]; - struct addrinfo hints, *res, *ai; - struct sockaddr_storage from; - struct pollfd pfd[2]; - int32_t oldmask; - pid_t pid; - int s, lport, timo, error; - char c; - int refused; - char num[8]; - ssize_t n; - - if (af != AF_INET && af != AF_INET6 && af != AF_UNSPEC) - { - __set_errno (EAFNOSUPPORT); - return -1; - } - - pid = __getpid(); - - memset(&hints, '\0', sizeof(hints)); - hints.ai_flags = AI_CANONNAME; - hints.ai_family = af; - hints.ai_socktype = SOCK_STREAM; - (void)snprintf(num, sizeof(num), "%d", ntohs(rport)); - error = getaddrinfo(*ahost, num, &hints, &res); - if (error) { - if (error == EAI_NONAME && *ahost != NULL) { - if (_IO_fwide (stderr, 0) > 0) - __fwprintf(stderr, L"%s: Unknown host\n", - *ahost); - else - fprintf(stderr, "%s: Unknown host\n", *ahost); - } else { - if (_IO_fwide (stderr, 0) > 0) - __fwprintf(stderr, L"rcmd: getaddrinfo: %s\n", - gai_strerror(error)); - else - fprintf(stderr, "rcmd: getaddrinfo: %s\n", - gai_strerror(error)); - } - return (-1); - } - - pfd[0].events = POLLIN; - pfd[1].events = POLLIN; - - if (res->ai_canonname){ - free (ahostbuf); - ahostbuf = strdup (res->ai_canonname); - if (ahostbuf == NULL) { - if (_IO_fwide (stderr, 0) > 0) - __fwprintf(stderr, L"%s", - _("rcmd: Cannot allocate memory\n")); - else - fputs(_("rcmd: Cannot allocate memory\n"), - stderr); - return (-1); - } - *ahost = ahostbuf; - } else - *ahost = NULL; - ai = res; - refused = 0; - oldmask = __sigblock(sigmask(SIGURG)); - for (timo = 1, lport = IPPORT_RESERVED - 1;;) { - char errbuf[200]; - - s = rresvport_af(&lport, ai->ai_family); - if (s < 0) { - if (errno == EAGAIN) { - if (_IO_fwide (stderr, 0) > 0) - __fwprintf(stderr, L"%s", - _("rcmd: socket: All ports in use\n")); - else - fputs(_("rcmd: socket: All ports in use\n"), - stderr); - } else { - if (_IO_fwide (stderr, 0) > 0) - __fwprintf(stderr, - L"rcmd: socket: %m\n"); - else - fprintf(stderr, "rcmd: socket: %m\n"); - } - __sigsetmask(oldmask); - freeaddrinfo(res); - return -1; - } - __fcntl(s, F_SETOWN, pid); - if (__connect(s, ai->ai_addr, ai->ai_addrlen) >= 0) - break; - (void)__close(s); - if (errno == EADDRINUSE) { - lport--; - continue; - } - if (errno == ECONNREFUSED) - refused = 1; - if (ai->ai_next != NULL) { - int oerrno = errno; - char *buf = NULL; - - getnameinfo(ai->ai_addr, ai->ai_addrlen, - paddr, sizeof(paddr), - NULL, 0, - NI_NUMERICHOST); - - if (__asprintf (&buf, _("connect to address %s: "), - paddr) >= 0) - { - if (_IO_fwide (stderr, 0) > 0) - __fwprintf(stderr, L"%s", buf); - else - fputs (buf, stderr); - free (buf); - } - __set_errno (oerrno); - perror(0); - ai = ai->ai_next; - getnameinfo(ai->ai_addr, ai->ai_addrlen, - paddr, sizeof(paddr), - NULL, 0, - NI_NUMERICHOST); - if (__asprintf (&buf, _("Trying %s...\n"), paddr) >= 0) - { - if (_IO_fwide (stderr, 0) > 0) - __fwprintf (stderr, L"%s", buf); - else - fputs (buf, stderr); - free (buf); - } - continue; - } - if (refused && timo <= 16) { - (void)sleep(timo); - timo *= 2; - ai = res; - refused = 0; - continue; - } - freeaddrinfo(res); - if (_IO_fwide (stderr, 0) > 0) - (void)__fwprintf(stderr, L"%s: %s\n", *ahost, - strerror_r(errno, - errbuf, sizeof (errbuf))); - else - (void)fprintf(stderr, "%s: %s\n", *ahost, - strerror_r(errno, - errbuf, sizeof (errbuf))); - __sigsetmask(oldmask); - return -1; - } - lport--; - if (fd2p == 0) { - __write(s, "", 1); - lport = 0; - } else { - char num[8]; - int s2 = rresvport_af(&lport, ai->ai_family), s3; - socklen_t len = ai->ai_addrlen; - - if (s2 < 0) - goto bad; - listen(s2, 1); - (void)snprintf(num, sizeof(num), "%d", lport); - if (__write(s, num, strlen(num)+1) != (ssize_t)strlen(num)+1) { - char *buf = NULL; - - if (__asprintf (&buf, _("\ -rcmd: write (setting up stderr): %m\n")) >= 0) - { - if (_IO_fwide (stderr, 0) > 0) - __fwprintf(stderr, L"%s", buf); - else - fputs (buf, stderr); - free (buf); - } - (void)__close(s2); - goto bad; - } - pfd[0].fd = s; - pfd[1].fd = s2; - __set_errno (0); - if (__poll (pfd, 2, -1) < 1 || (pfd[1].revents & POLLIN) == 0){ - char *buf = NULL; - - if ((errno != 0 - && __asprintf(&buf, _("\ -rcmd: poll (setting up stderr): %m\n")) >= 0) - || (errno == 0 - && __asprintf(&buf, _("\ -poll: protocol failure in circuit setup\n")) >= 0)) - { - if (_IO_fwide (stderr, 0) > 0) - __fwprintf (stderr, L"%s", buf); - else - fputs (buf, stderr); - free (buf); - } - (void)__close(s2); - goto bad; - } - s3 = TEMP_FAILURE_RETRY (accept(s2, (struct sockaddr *)&from, - &len)); - switch (from.ss_family) { - case AF_INET: - rport = ntohs(((struct sockaddr_in *)&from)->sin_port); - break; - case AF_INET6: - rport = ntohs(((struct sockaddr_in6 *)&from)->sin6_port); - break; - default: - rport = 0; - break; - } - (void)__close(s2); - if (s3 < 0) { - if (_IO_fwide (stderr, 0) > 0) - (void)__fwprintf(stderr, - L"rcmd: accept: %m\n"); - else - (void)fprintf(stderr, - "rcmd: accept: %m\n"); - lport = 0; - goto bad; - } - *fd2p = s3; - - if (rport >= IPPORT_RESERVED || rport < IPPORT_RESERVED / 2){ - char *buf = NULL; - - if (__asprintf(&buf, _("\ -socket: protocol failure in circuit setup\n")) >= 0) - { - if (_IO_fwide (stderr, 0) > 0) - __fwprintf (stderr, L"%s", buf); - else - fputs (buf, stderr); - free (buf); - } - goto bad2; - } - } - struct iovec iov[3] = - { - [0] = { .iov_base = (void *) locuser, - .iov_len = strlen (locuser) + 1 }, - [1] = { .iov_base = (void *) remuser, - .iov_len = strlen (remuser) + 1 }, - [2] = { .iov_base = (void *) cmd, - .iov_len = strlen (cmd) + 1 } - }; - (void) TEMP_FAILURE_RETRY (writev (s, iov, 3)); - n = TEMP_FAILURE_RETRY (read(s, &c, 1)); - if (n != 1) { - char *buf = NULL; - - if ((n == 0 - && asprintf(&buf, _("rcmd: %s: short read"), - *ahost) >= 0) - || (n != 0 - && asprintf(&buf, "rcmd: %s: %m\n", *ahost) >= 0)) - { - if (_IO_fwide (stderr, 0) > 0) - __fwprintf (stderr, L"%s", buf); - else - fputs (buf, stderr); - free (buf); - } - goto bad2; - } - if (c != 0) { - while (__read(s, &c, 1) == 1) { - (void)__write(STDERR_FILENO, &c, 1); - if (c == '\n') - break; - } - goto bad2; - } - __sigsetmask(oldmask); - freeaddrinfo(res); - return s; -bad2: - if (lport) - (void)__close(*fd2p); -bad: - (void)__close(s); - __sigsetmask(oldmask); - freeaddrinfo(res); - return -1; -} -libc_hidden_def (rcmd_af) - -int -rcmd(ahost, rport, locuser, remuser, cmd, fd2p) - char **ahost; - u_short rport; - const char *locuser, *remuser, *cmd; - int *fd2p; -{ - return rcmd_af (ahost, rport, locuser, remuser, cmd, fd2p, AF_INET); -} - -int -rresvport_af(alport, family) - int *alport; - sa_family_t family; -{ - struct sockaddr_storage ss; - int s; - size_t len; - uint16_t *sport; - - switch(family){ - case AF_INET: - len = sizeof(struct sockaddr_in); - sport = &((struct sockaddr_in *)&ss)->sin_port; - break; - case AF_INET6: - len = sizeof(struct sockaddr_in6); - sport = &((struct sockaddr_in6 *)&ss)->sin6_port; - break; - default: - __set_errno (EAFNOSUPPORT); - return -1; - } - s = __socket(family, SOCK_STREAM, 0); - if (s < 0) - return -1; - - memset (&ss, '\0', sizeof(ss)); -#ifdef SALEN - ss.__ss_len = len; -#endif - ss.ss_family = family; - - /* Ignore invalid values. */ - if (*alport < IPPORT_RESERVED / 2) - *alport = IPPORT_RESERVED / 2; - else if (*alport >= IPPORT_RESERVED) - *alport = IPPORT_RESERVED - 1; - - int start = *alport; - do { - *sport = htons((uint16_t) *alport); - if (__bind(s, (struct sockaddr *)&ss, len) >= 0) - return s; - if (errno != EADDRINUSE) { - (void)__close(s); - return -1; - } - if ((*alport)-- == IPPORT_RESERVED/2) - *alport = IPPORT_RESERVED - 1; - } while (*alport != start); - (void)__close(s); - __set_errno (EAGAIN); - return -1; -} -libc_hidden_def (rresvport_af) - -int -rresvport(alport) - int *alport; -{ - return rresvport_af(alport, AF_INET); -} - -int __check_rhosts_file = 1; -char *__rcmd_errstr; - -int -ruserok_af(rhost, superuser, ruser, luser, af) - const char *rhost, *ruser, *luser; - int superuser; - sa_family_t af; -{ - struct addrinfo hints, *res, *res0; - int gai; - int ret; - - memset (&hints, '\0', sizeof(hints)); - hints.ai_family = af; - gai = getaddrinfo(rhost, NULL, &hints, &res0); - if (gai) - return -1; - ret = -1; - for (res=res0; res; res=res->ai_next) - if (ruserok2_sa(res->ai_addr, res->ai_addrlen, - superuser, ruser, luser, rhost) == 0){ - ret = 0; - break; - } - freeaddrinfo(res0); - return (ret); -} -libc_hidden_def (ruserok_af) - -int -ruserok(rhost, superuser, ruser, luser) - const char *rhost, *ruser, *luser; - int superuser; -{ - return ruserok_af(rhost, superuser, ruser, luser, AF_INET); -} - -/* Extremely paranoid file open function. */ -static FILE * -iruserfopen (const char *file, uid_t okuser) -{ - struct stat64 st; - char *cp = NULL; - FILE *res = NULL; - - /* If not a regular file, if owned by someone other than user or - root, if writeable by anyone but the owner, or if hardlinked - anywhere, quit. */ - cp = NULL; - if (__lxstat64 (_STAT_VER, file, &st)) - cp = _("lstat failed"); - else if (!S_ISREG (st.st_mode)) - cp = _("not regular file"); - else - { - res = fopen (file, "rc"); - if (!res) - cp = _("cannot open"); - else if (__fxstat64 (_STAT_VER, fileno (res), &st) < 0) - cp = _("fstat failed"); - else if (st.st_uid && st.st_uid != okuser) - cp = _("bad owner"); - else if (st.st_mode & (S_IWGRP|S_IWOTH)) - cp = _("writeable by other than owner"); - else if (st.st_nlink > 1) - cp = _("hard linked somewhere"); - } - - /* If there were any problems, quit. */ - if (cp != NULL) - { - __rcmd_errstr = cp; - if (res) - fclose (res); - return NULL; - } - - /* No threads use this stream. */ - __fsetlocking (res, FSETLOCKING_BYCALLER); - - return res; -} - -/* - * New .rhosts strategy: We are passed an ip address. We spin through - * hosts.equiv and .rhosts looking for a match. When the .rhosts only - * has ip addresses, we don't have to trust a nameserver. When it - * contains hostnames, we spin through the list of addresses the nameserver - * gives us and look for a match. - * - * Returns 0 if ok, -1 if not ok. - */ -static int -ruserok2_sa (ra, ralen, superuser, ruser, luser, rhost) - struct sockaddr *ra; - size_t ralen; - int superuser; - const char *ruser, *luser, *rhost; -{ - FILE *hostf = NULL; - int isbad = -1; - - if (!superuser) - hostf = iruserfopen (_PATH_HEQUIV, 0); - - if (hostf) - { - isbad = __validuser2_sa (hostf, ra, ralen, luser, ruser, rhost); - fclose (hostf); - - if (!isbad) - return 0; - } - - if (__check_rhosts_file || superuser) - { - char *pbuf; - struct passwd pwdbuf, *pwd; - size_t dirlen; - size_t buflen = __sysconf (_SC_GETPW_R_SIZE_MAX); - char *buffer = __alloca (buflen); - uid_t uid; - - if (__getpwnam_r (luser, &pwdbuf, buffer, buflen, &pwd) != 0 - || pwd == NULL) - return -1; - - dirlen = strlen (pwd->pw_dir); - pbuf = alloca (dirlen + sizeof "/.rhosts"); - __mempcpy (__mempcpy (pbuf, pwd->pw_dir, dirlen), - "/.rhosts", sizeof "/.rhosts"); - - /* Change effective uid while reading .rhosts. If root and - reading an NFS mounted file system, can't read files that - are protected read/write owner only. */ - uid = __geteuid (); - seteuid (pwd->pw_uid); - hostf = iruserfopen (pbuf, pwd->pw_uid); - - if (hostf != NULL) - { - isbad = __validuser2_sa (hostf, ra, ralen, luser, ruser, rhost); - fclose (hostf); - } - - seteuid (uid); - return isbad; - } - return -1; -} -/* - * ruserok_sa() is now discussed on ipng, so - * currently disabled for external use - */ -static int ruserok_sa(ra, ralen, superuser, ruser, luser) - struct sockaddr *ra; - size_t ralen; - int superuser; - const char *ruser, *luser; -{ - return ruserok2_sa(ra, ralen, superuser, ruser, luser, "-"); -} - -/* This is the exported version. */ -int -iruserok_af (raddr, superuser, ruser, luser, af) - const void *raddr; - int superuser; - const char *ruser, *luser; - sa_family_t af; -{ - struct sockaddr_storage ra; - size_t ralen; - - memset (&ra, '\0', sizeof(ra)); - switch (af){ - case AF_INET: - ((struct sockaddr_in *)&ra)->sin_family = AF_INET; - memcpy (&(((struct sockaddr_in *)&ra)->sin_addr), raddr, - sizeof(struct in_addr)); - ralen = sizeof(struct sockaddr_in); - break; - case AF_INET6: - ((struct sockaddr_in6 *)&ra)->sin6_family = AF_INET6; - memcpy (&(((struct sockaddr_in6 *)&ra)->sin6_addr), raddr, - sizeof(struct in6_addr)); - ralen = sizeof(struct sockaddr_in6); - break; - default: - return 0; - } - return ruserok_sa ((struct sockaddr *)&ra, ralen, superuser, ruser, luser); -} -libc_hidden_def (iruserok_af) - -int -iruserok (raddr, superuser, ruser, luser) - u_int32_t raddr; - int superuser; - const char *ruser, *luser; -{ - return iruserok_af (&raddr, superuser, ruser, luser, AF_INET); -} - -/* - * XXX - * Don't make static, used by lpd(8). - * - * This function is not used anymore. It is only present because lpd(8) - * calls it (!?!). We simply call __invaliduser2() with an illegal rhost - * argument. This means that netgroups won't work in .rhost/hosts.equiv - * files. If you want lpd to work with netgroups, fix lpd to use ruserok() - * or PAM. - * Returns 0 if ok, -1 if not ok. - */ -int -__ivaliduser(hostf, raddr, luser, ruser) - FILE *hostf; - u_int32_t raddr; - const char *luser, *ruser; -{ - struct sockaddr_in ra; - memset(&ra, '\0', sizeof(ra)); - ra.sin_family = AF_INET; - ra.sin_addr.s_addr = raddr; - return __validuser2_sa(hostf, (struct sockaddr *)&ra, sizeof(ra), - luser, ruser, "-"); -} - - -/* Returns 1 on positive match, 0 on no match, -1 on negative match. */ -static int -internal_function -__checkhost_sa (struct sockaddr *ra, size_t ralen, char *lhost, - const char *rhost) -{ - struct addrinfo hints, *res0, *res; - char raddr[INET6_ADDRSTRLEN]; - int match; - int negate=1; /* Multiply return with this to get -1 instead of 1 */ - - /* Check nis netgroup. */ - if (strncmp ("+@", lhost, 2) == 0) - return innetgr (&lhost[2], rhost, NULL, NULL); - - if (strncmp ("-@", lhost, 2) == 0) - return -innetgr (&lhost[2], rhost, NULL, NULL); - - /* -host */ - if (strncmp ("-", lhost,1) == 0) { - negate = -1; - lhost++; - } else if (strcmp ("+",lhost) == 0) { - return 1; /* asking for trouble, but ok.. */ - } - - /* Try for raw ip address first. */ - /* XXX */ - if (getnameinfo(ra, ralen, - raddr, sizeof(raddr), NULL, 0, - NI_NUMERICHOST) == 0 - && strcmp(raddr, lhost) == 0) - return negate; - - /* Better be a hostname. */ - match = 0; - memset(&hints, '\0', sizeof(hints)); - hints.ai_family = ra->sa_family; - if (getaddrinfo(lhost, NULL, &hints, &res0) == 0){ - /* Spin through ip addresses. */ - for (res = res0; res; res = res->ai_next) - { - if (res->ai_family == ra->sa_family - && !memcmp(res->ai_addr, ra, res->ai_addrlen)) - { - match = 1; - break; - } - } - freeaddrinfo (res0); - } - return negate * match; -} - -/* Returns 1 on positive match, 0 on no match, -1 on negative match. */ -static int -internal_function -__icheckuser (const char *luser, const char *ruser) -{ - /* - luser is user entry from .rhosts/hosts.equiv file - ruser is user id on remote host - */ - - /* [-+]@netgroup */ - if (strncmp ("+@", luser, 2) == 0) - return innetgr (&luser[2], NULL, ruser, NULL); - - if (strncmp ("-@", luser,2) == 0) - return -innetgr (&luser[2], NULL, ruser, NULL); - - /* -user */ - if (strncmp ("-", luser, 1) == 0) - return -(strcmp (&luser[1], ruser) == 0); - - /* + */ - if (strcmp ("+", luser) == 0) - return 1; - - /* simple string match */ - return strcmp (ruser, luser) == 0; -} - -/* - * Returns 1 for blank lines (or only comment lines) and 0 otherwise - */ -static int -__isempty (char *p) -{ - while (*p && isspace (*p)) { - ++p; - } - - return (*p == '\0' || *p == '#') ? 1 : 0 ; -} - -/* - * Returns 0 if positive match, -1 if _not_ ok. - */ -static int -__validuser2_sa(hostf, ra, ralen, luser, ruser, rhost) - FILE *hostf; - struct sockaddr *ra; - size_t ralen; - const char *luser, *ruser, *rhost; -{ - register const char *user; - register char *p; - int hcheck, ucheck; - char *buf = NULL; - size_t bufsize = 0; - int retval = -1; - - while (__getline (&buf, &bufsize, hostf) > 0) { - buf[bufsize - 1] = '\0'; /* Make sure it's terminated. */ - p = buf; - - /* Skip empty or comment lines */ - if (__isempty (p)) { - continue; - } - - for (;*p && !isspace(*p); ++p) { - *p = _tolower (*p); - } - - /* Next we want to find the permitted name for the remote user. */ - if (*p == ' ' || *p == '\t') { - /* <nul> terminate hostname and skip spaces */ - for (*p++='\0'; *p && isspace (*p); ++p); - - user = p; /* this is the user's name */ - while (*p && !isspace (*p)) - ++p; /* find end of user's name */ - } else - user = p; - - *p = '\0'; /* <nul> terminate username (+host?) */ - - /* buf -> host(?) ; user -> username(?) */ - - /* First check host part */ - hcheck = __checkhost_sa (ra, ralen, buf, rhost); - - if (hcheck < 0) - break; - - if (hcheck) { - /* Then check user part */ - if (! (*user)) - user = luser; - - ucheck = __icheckuser (user, ruser); - - /* Positive 'host user' match? */ - if (ucheck > 0) { - retval = 0; - break; - } - - /* Negative 'host -user' match? */ - if (ucheck < 0) - break; - - /* Neither, go on looking for match */ - } - } - - if (buf != NULL) - free (buf); - - return retval; -} |