1 /* 2 * Copyright (c) 2012 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Matthew Dillon <dillon@backplane.com> 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 3. Neither the name of The DragonFly Project nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific, prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include "hammer.h" 36 37 #define REMOTE_MAXARGS 256 38 39 /* 40 * Execute SSH_ORIGINAL_COMMAND if it matches 41 */ 42 void 43 hammer_cmd_sshremote(const char *cmd, const char *target) 44 { 45 char *env, *str, *dup; 46 const char *av[REMOTE_MAXARGS + 1]; 47 int ac; 48 49 if ((env = getenv("SSH_ORIGINAL_COMMAND")) == NULL) { 50 errx(1, "SSH_ORIGINAL_COMMAND env missing"); 51 /* not reached */ 52 } 53 54 dup = env = strdup(env); 55 av[0] = "hammer"; 56 av[1] = "-R"; 57 av[2] = cmd; 58 av[3] = "-T"; 59 av[4] = target; 60 ac = 5; 61 62 str = strsep(&env, " \t\r\n"); 63 if (str == NULL) { 64 errx(1, "hammer-remote: null command"); 65 /* not reached */ 66 } 67 68 if (strstr(str, "hammer") == NULL) { 69 errx(1, "hammer-remote: Command not 'hammer'"); 70 /* not reached */ 71 } 72 73 while (ac < REMOTE_MAXARGS) { 74 av[ac] = strsep(&env, " \t\r\n"); 75 ++ac; 76 if (av[ac - 1] == NULL) 77 break; 78 } 79 free(dup); 80 execv("/sbin/hammer", (void *)av); 81 err(1, "hammer-remote: execv failed"); 82 /* not reached */ 83 } 84