1 /* 2 * ***************************************************************************** 3 * 4 * SPDX-License-Identifier: BSD-2-Clause 5 * 6 * Copyright (c) 2018-2021 Gavin D. Howard and contributors. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions are met: 10 * 11 * * Redistributions of source code must retain the above copyright notice, this 12 * list of conditions and the following disclaimer. 13 * 14 * * Redistributions in binary form must reproduce the above copyright notice, 15 * this list of conditions and the following disclaimer in the documentation 16 * and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 * 30 * ***************************************************************************** 31 * 32 * The entry point for bc. 33 * 34 */ 35 36 #include <assert.h> 37 #include <stdlib.h> 38 #include <string.h> 39 40 #if BC_ENABLE_NLS 41 #include <locale.h> 42 #endif // BC_ENABLE_NLS 43 44 #ifndef _WIN32 45 #include <libgen.h> 46 #endif // _WIN32 47 48 #include <setjmp.h> 49 50 #include <version.h> 51 #include <status.h> 52 #include <vm.h> 53 #include <bc.h> 54 #include <dc.h> 55 56 int main(int argc, char *argv[]) { 57 58 char *name; 59 size_t len = strlen(BC_EXECPREFIX); 60 61 #if BC_ENABLE_NLS 62 // Must set the locale properly in order to have the right error messages. 63 vm.locale = setlocale(LC_ALL, ""); 64 #endif // BC_ENABLE_NLS 65 66 // Set the start pledge(). 67 bc_pledge(bc_pledge_start, NULL); 68 69 // Sometimes, argv[0] can be NULL. Better make sure to be robust against it. 70 if (argv[0] != NULL) { 71 72 // Figure out the name of the calculator we are using. We can't use 73 // basename because it's not portable, but yes, this is stripping off 74 // the directory. 75 name = strrchr(argv[0], BC_FILE_SEP); 76 vm.name = (name == NULL) ? argv[0] : name + 1; 77 } 78 else 79 { 80 #if !DC_ENABLED 81 vm.name = "bc"; 82 #elif !BC_ENABLED 83 vm.name = "dc"; 84 #else 85 // Just default to bc in that case. 86 vm.name = "bc"; 87 #endif 88 } 89 90 // If the name is longer than the length of the prefix, skip the prefix. 91 if (strlen(vm.name) > len) vm.name += len; 92 93 BC_SIG_LOCK; 94 95 // We *must* do this here. Otherwise, other code could not jump out all of 96 // the way. 97 bc_vec_init(&vm.jmp_bufs, sizeof(sigjmp_buf), BC_DTOR_NONE); 98 99 BC_SETJMP_LOCKED(exit); 100 101 #if !DC_ENABLED 102 bc_main(argc, argv); 103 #elif !BC_ENABLED 104 dc_main(argc, argv); 105 #else 106 // BC_IS_BC uses vm.name, which was set above. So we're good. 107 if (BC_IS_BC) bc_main(argc, argv); 108 else dc_main(argc, argv); 109 #endif 110 111 exit: 112 BC_SIG_MAYLOCK; 113 114 // Ensure we exit appropriately. 115 return bc_vm_atexit((int) vm.status); 116 } 117