main.c revision 42386
1/* 2 * The new sysinstall program. 3 * 4 * This is probably the last attempt in the `sysinstall' line, the next 5 * generation being slated for what's essentially a complete rewrite. 6 * 7 * $Id: main.c,v 1.49 1998/03/10 13:42:02 jkh Exp $ 8 * 9 * Copyright (c) 1995 10 * Jordan Hubbard. All rights reserved. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer, 17 * verbatim and that no modifications are made prior to this 18 * point in the file. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 23 * THIS SOFTWARE IS PROVIDED BY JORDAN HUBBARD ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL JORDAN HUBBARD OR HIS PETS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, LIFE OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 */ 36 37#include "sysinstall.h" 38#include <sys/signal.h> 39#include <sys/fcntl.h> 40 41static void 42screech(int sig) 43{ 44 msgDebug("\007Signal %d caught! That's bad!\n", sig); 45 longjmp(BailOut, sig); 46} 47 48int 49main(int argc, char **argv) 50{ 51 int choice, scroll, curr, max, status; 52 53 /* Catch fatal signals and complain about them if running as init */ 54 if (getpid() == 1) { 55 signal(SIGBUS, screech); 56 signal(SIGSEGV, screech); 57 } 58 59 /* We don't work too well when running as non-root anymore */ 60 if (geteuid() != 0) { 61 fprintf(stderr, "Error: This utility should only be run as root.\n"); 62 return 1; 63 } 64 65 /* Set up whatever things need setting up */ 66 systemInitialize(argc, argv); 67 68 /* Set default flag and variable values */ 69 installVarDefaults(NULL); 70 /* only when multi-user is it reasonable to do this here */ 71 if (!RunningAsInit) 72 installEnvironment(); 73 74 if (argc > 1 && !strcmp(argv[1], "-fake")) { 75 variable_set2(VAR_DEBUG, "YES"); 76 Fake = TRUE; 77 msgConfirm("I'll be just faking it from here on out, OK?"); 78 } 79 80 /* Try to preserve our scroll-back buffer */ 81 if (OnVTY) { 82 for (curr = 0; curr < 25; curr++) 83 putchar('\n'); 84 } 85 /* Move stderr aside */ 86 if (DebugFD) 87 dup2(DebugFD, 2); 88 89 /* Probe for all relevant devices on the system */ 90 deviceGetAll(); 91 92 /* First, see if we have any arguments to process (and argv[0] counts if it's not "sysinstall") */ 93 if (!RunningAsInit) { 94 int i, start_arg; 95 96 if (!strstr(argv[0], "sysinstall")) 97 start_arg = 0; 98 else if (Fake) 99 start_arg = 2; 100 else 101 start_arg = 1; 102 for (i = start_arg; i < argc; i++) { 103 if (DITEM_STATUS(dispatchCommand(argv[i])) != DITEM_SUCCESS) 104 systemShutdown(1); 105 } 106 if (argc > start_arg) 107 systemShutdown(0); 108 } 109 else 110 dispatch_load_file_int(TRUE); 111 112 status = setjmp(BailOut); 113 if (status) { 114 msgConfirm("A signal %d was caught - I'm saving what I can and shutting\n" 115 "If you can reproduce the problem, please turn Debug on in\n" 116 "the Options menu for the extra information it provides in\n" 117 "debugging problems like this.", status); 118 systemShutdown(status); 119 } 120 121 /* Begin user dialog at outer menu */ 122 dialog_clear(); 123 while (1) { 124 choice = scroll = curr = max = 0; 125 dmenuOpen(&MenuInitial, &choice, &scroll, &curr, &max, TRUE); 126 if (getpid() != 1 127#ifdef __alpha__ 128 || !msgYesNo("Are you sure you wish to exit? The system will halt.") 129#else 130 || !msgYesNo("Are you sure you wish to exit? The system will reboot\n" 131 "(be sure to remove any floppies from the drives).") 132#endif 133 ) 134 break; 135 } 136 137 /* Say goodnight, Gracie */ 138 systemShutdown(0); 139 140 return 0; /* We should never get here */ 141} 142