main.c revision 43685 
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 1.50 1999/01/08 00:14:22 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", 0);
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