diff options
Diffstat (limited to 'newlib/libc/sys/linux/net/rcmdsh.c')
| -rw-r--r-- | newlib/libc/sys/linux/net/rcmdsh.c | 169 |
1 files changed, 0 insertions, 169 deletions
diff --git a/newlib/libc/sys/linux/net/rcmdsh.c b/newlib/libc/sys/linux/net/rcmdsh.c deleted file mode 100644 index 741814c11..000000000 --- a/newlib/libc/sys/linux/net/rcmdsh.c +++ /dev/null @@ -1,169 +0,0 @@ -/* $OpenBSD: rcmdsh.c,v 1.5 1998/04/25 16:23:58 millert Exp $ */ - -/* - * Copyright (c) 2001, MagniComp - * 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 MagniComp 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 COPYRIGHT HOLDERS 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. - */ - -/* - * This is an rcmd() replacement originally by - * Chris Siebenmann <cks@utcc.utoronto.ca>. - */ - -#include <sys/cdefs.h> -#include <sys/types.h> -#include <machine/endian.h> - -#include <sys/types.h> -#include <sys/socket.h> -#include <sys/wait.h> - -#include <errno.h> -#include <netdb.h> -#include <paths.h> -#include <pwd.h> -#include <stdio.h> -#include <string.h> -#include <unistd.h> - -#ifndef _PATH_RSH -#define _PATH_RSH "/usr/bin/rsh" -#endif - -/* - * This is a replacement rcmd() function that uses the rsh(1) - * program in place of a direct rcmd(3) function call so as to - * avoid having to be root. Note that rport is ignored. - */ -int -rcmdsh(ahost, rport, locuser, remuser, cmd, rshprog) - char **ahost; - int rport; - const char *locuser, *remuser, *cmd, *rshprog; -{ - struct addrinfo hints, *res; - int cpid, sp[2], error; - char *p; - struct passwd *pw; - char num[8]; - static char hbuf[NI_MAXHOST]; - - /* What rsh/shell to use. */ - if (rshprog == NULL) - rshprog = _PATH_RSH; - - /* locuser must exist on this host. */ - if ((pw = getpwnam(locuser)) == NULL) { - (void)fprintf(stderr, "rcmdsh: unknown user: %s\n", locuser); - return (-1); - } - - /* Validate remote hostname. */ - if (strcmp(*ahost, "localhost") != 0) { - memset(&hints, 0, sizeof(hints)); - hints.ai_flags = AI_CANONNAME; - hints.ai_family = PF_UNSPEC; - hints.ai_socktype = SOCK_STREAM; - (void)snprintf(num, sizeof(num), "%d", ntohs(rport)); - error = getaddrinfo(*ahost, num, &hints, &res); - if (error) { - fprintf(stderr, "rcmdsh: getaddrinfo: %s\n", - gai_strerror(error)); - return (-1); - } - if (res->ai_canonname) { - strncpy(hbuf, res->ai_canonname, sizeof(hbuf) - 1); - hbuf[sizeof(hbuf) - 1] = '\0'; - *ahost = hbuf; - } - freeaddrinfo(res); - } - - /* Get a socketpair we'll use for stdin and stdout. */ - if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, sp) == -1) { - perror("rcmdsh: socketpair"); - return (-1); - } - - cpid = fork(); - if (cpid == -1) { - perror("rcmdsh: fork failed"); - return (-1); - } else if (cpid == 0) { - /* - * Child. We use sp[1] to be stdin/stdout, and close sp[0]. - */ - (void)close(sp[0]); - if (dup2(sp[1], 0) == -1 || dup2(0, 1) == -1) { - perror("rcmdsh: dup2 failed"); - _exit(255); - } - /* Fork again to lose parent. */ - cpid = fork(); - if (cpid == -1) { - perror("rcmdsh: fork to lose parent failed"); - _exit(255); - } - if (cpid > 0) - _exit(0); - - /* In grandchild here. Become local user for rshprog. */ - if (setuid(pw->pw_uid) == -1) { - (void)fprintf(stderr, "rcmdsh: setuid(%u): %s\n", - pw->pw_uid, strerror(errno)); - _exit(255); - } - - /* - * If remote host is "localhost" and local and remote users - * are the same, avoid running remote shell for efficiency. - */ - if (strcmp(*ahost, "localhost") == 0 && - strcmp(locuser, remuser) == 0) { - if (pw->pw_shell[0] == '\0') - rshprog = _PATH_BSHELL; - else - rshprog = pw->pw_shell; - p = strrchr(rshprog, '/'); - execlp(rshprog, p ? p + 1 : rshprog, "-c", cmd, - (char *)NULL); - } else { - p = strrchr(rshprog, '/'); - execlp(rshprog, p ? p + 1 : rshprog, *ahost, "-l", - remuser, cmd, (char *)NULL); - } - (void)fprintf(stderr, "rcmdsh: execlp %s failed: %s\n", - rshprog, strerror(errno)); - _exit(255); - } else { - /* Parent. close sp[1], return sp[0]. */ - (void)close(sp[1]); - /* Reap child. */ - (void)wait(NULL); - return (sp[0]); - } - /* NOTREACHED */ -} |