main.c revision 33738
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 1.47 1997/09/16 18:57:09 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 installEnvironment(); 71 72 if (argc > 1 && !strcmp(argv[1], "-fake")) { 73 variable_set2(VAR_DEBUG, "YES"); 74 Fake = TRUE; 75 msgConfirm("I'll be just faking it from here on out, OK?"); 76 } 77 78 /* Try to preserve our scroll-back buffer */ 79 if (OnVTY) { 80 for (curr = 0; curr < 25; curr++) 81 putchar('\n'); 82 } 83 /* Move stderr aside */ 84 if (DebugFD) 85 dup2(DebugFD, 2); 86 87 /* Probe for all relevant devices on the system */ 88 deviceGetAll(); 89 90 /* First, see if we have any arguments to process (and argv[0] counts if it's not "sysinstall") */ 91 if (!RunningAsInit) { 92 int i, start_arg; 93 94 if (!strstr(argv[0], "sysinstall")) 95 start_arg = 0; 96 else if (Fake) 97 start_arg = 2; 98 else 99 start_arg = 1; 100 for (i = start_arg; i < argc; i++) { 101 if (DITEM_STATUS(dispatchCommand(argv[i])) != DITEM_SUCCESS) 102 systemShutdown(1); 103 } 104 if (argc > start_arg) 105 systemShutdown(0); 106 } 107 else 108 dispatch_load_file_int(TRUE); 109 110 status = setjmp(BailOut); 111 if (status) { 112 msgConfirm("A signal %d was caught - I'm saving what I can and shutting\n" 113 "If you can reproduce the problem, please turn Debug on in\n" 114 "the Options menu for the extra information it provides in\n" 115 "debugging problems like this.", status); 116 systemShutdown(status); 117 } 118 119 /* Begin user dialog at outer menu */ 120 dialog_clear(); 121 while (1) { 122 choice = scroll = curr = max = 0; 123 dmenuOpen(&MenuInitial, &choice, &scroll, &curr, &max, TRUE); 124 if (getpid() != 1 || !msgYesNo("Are you sure you wish to exit? The system will reboot\n" 125 "(be sure to remove any floppies from the drives).")) 126 break; 127 } 128 129 /* Say goodnight, Gracie */ 130 systemShutdown(0); 131 132 return 0; /* We should never get here */ 133} 134