1 /* 2 * Copyright (c) 1994 University of Maryland 3 * All Rights Reserved. 4 * 5 * Permission to use, copy, modify, distribute, and sell this software and its 6 * documentation for any purpose is hereby granted without fee, provided that 7 * the above copyright notice appear in all copies and that both that 8 * copyright notice and this permission notice appear in supporting 9 * documentation, and that the name of U.M. not be used in advertising or 10 * publicity pertaining to distribution of the software without specific, 11 * written prior permission. U.M. makes no representations about the 12 * suitability of this software for any purpose. It is provided "as is" 13 * without express or implied warranty. 14 * 15 * U.M. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL U.M. 17 * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 18 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION 19 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 20 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 21 * 22 * Author: James da Silva, Systems Design and Analysis Group 23 * Computer Science Department 24 * University of Maryland at College Park 25 */ 26 /* 27 * crunched_main.c - main program for crunched binaries, it branches to a 28 * particular subprogram based on the value of argv[0]. Also included 29 * is a little program invoked when the crunched binary is called via 30 * its EXECNAME. This one prints out the list of compiled-in binaries, 31 * or calls one of them based on argv[1]. This allows the testing of 32 * the crunched binary without creating all the links. 33 */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <string.h> 41 42 struct stub { 43 char *name; 44 int (*f)(); 45 }; 46 47 extern char *__progname; 48 extern struct stub entry_points[]; 49 50 int 51 main(int argc, char **argv, char **envp) 52 { 53 char *slash, *basename; 54 struct stub *ep; 55 56 if(argv[0] == NULL || *argv[0] == '\0') 57 crunched_usage(); 58 59 slash = strrchr(argv[0], '/'); 60 basename = slash? slash+1 : argv[0]; 61 62 for(ep=entry_points; ep->name != NULL; ep++) 63 if(!strcmp(basename, ep->name)) break; 64 65 if(ep->name) 66 return ep->f(argc, argv, envp); 67 else { 68 fprintf(stderr, "%s: %s not compiled in\n", EXECNAME, basename); 69 crunched_usage(); 70 } 71 } 72 73 74 int 75 crunched_here(char *path) 76 { 77 char *slash, *basename; 78 struct stub *ep; 79 80 slash = strrchr(path, '/'); 81 basename = slash? slash+1 : path; 82 83 for(ep=entry_points; ep->name != NULL; ep++) 84 if(!strcmp(basename, ep->name)) 85 return 1; 86 return 0; 87 } 88 89 90 int 91 crunched_main(int argc, char **argv, char **envp) 92 { 93 char *slash; 94 struct stub *ep; 95 int columns, len; 96 97 if(argc <= 1) 98 crunched_usage(); 99 100 slash = strrchr(argv[1], '/'); 101 __progname = slash? slash+1 : argv[1]; 102 103 return main(--argc, ++argv, envp); 104 } 105 106 107 int 108 crunched_usage() 109 { 110 int columns, len; 111 struct stub *ep; 112 113 fprintf(stderr, "usage: %s <prog> <args> ..., where <prog> is one of:\n", 114 EXECNAME); 115 columns = 0; 116 for(ep=entry_points; ep->name != NULL; ep++) { 117 len = strlen(ep->name) + 1; 118 if(columns+len < 80) 119 columns += len; 120 else { 121 fprintf(stderr, "\n"); 122 columns = len; 123 } 124 fprintf(stderr, " %s", ep->name); 125 } 126 fprintf(stderr, "\n"); 127 exit(1); 128 } 129 130 /* end of crunched_main.c */ 131