1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved. 24 */ 25 26 #pragma init(init) 27 28 #include <s10_brand.h> 29 #include <stdlib.h> 30 #include <sys/syscall.h> 31 #include <dlfcn.h> 32 #include <link.h> 33 #include <limits.h> 34 #include <sys/mman.h> 35 #include <strings.h> 36 37 /* MAXCOMLEN is only defined in user.h in the kernel. */ 38 #define MAXCOMLEN 16 39 40 /* 41 * This is a library that is LD_PRELOADed into native processes. 42 * Its primary function is to perform one brand operation, B_S10_NATIVE, 43 * which checks that this is actually a native process. If it is, then 44 * the operation changes the executable name so that it is no longer 45 * ld.so.1. Instead it changes it to be the name of the real native 46 * executable that we're runnning. This allows things like pgrep to work 47 * as expected. Note that this brand operation only changes the process 48 * name wrt the kernel. From the process' perspective, AT_SUN_EXECNAME is 49 * still ld.so.1. ld.so.1 removes itself and its arguments from the argv list. 50 */ 51 void 52 init(void) 53 { 54 int i; 55 Dl_argsinfo_t argsinfo; 56 sysret_t rval; 57 char *pcomm; 58 char cmd_buf[MAXCOMLEN + 1]; 59 char arg_buf[PSARGSZ]; 60 61 if (dlinfo(RTLD_SELF, RTLD_DI_ARGSINFO, &argsinfo) == -1) 62 return; 63 64 /* get the base cmd name */ 65 if ((pcomm = strrchr(argsinfo.dla_argv[0], '/')) != NULL) 66 pcomm = pcomm + 1; 67 else 68 pcomm = argsinfo.dla_argv[0]; 69 (void) strlcpy(cmd_buf, pcomm, sizeof (cmd_buf)); 70 71 (void) strlcpy(arg_buf, argsinfo.dla_argv[0], sizeof (arg_buf)); 72 73 for (i = 1; i < argsinfo.dla_argc; i++) { 74 (void) strlcat(arg_buf, " ", sizeof (arg_buf)); 75 if (strlcat(arg_buf, argsinfo.dla_argv[i], sizeof (arg_buf)) 76 >= sizeof (arg_buf)) 77 break; 78 } 79 80 (void) __systemcall(&rval, SYS_brand, B_S10_NATIVE, cmd_buf, arg_buf); 81 } 82