main.c revision 47983 
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 1.51 1999/02/05 22:15:50 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#ifdef PCCARD
90    /* Initialize PC-card */
91    pccardInitialize();
92#endif
93
94    /* Probe for all relevant devices on the system */
95    deviceGetAll();
96
97    /* First, see if we have any arguments to process (and argv[0] counts if it's not "sysinstall") */
98    if (!RunningAsInit) {
99	int i, start_arg;
100
101	if (!strstr(argv[0], "sysinstall"))
102	    start_arg = 0;
103	else if (Fake)
104	    start_arg = 2;
105	else
106	    start_arg = 1;
107	for (i = start_arg; i < argc; i++) {
108	    if (DITEM_STATUS(dispatchCommand(argv[i])) != DITEM_SUCCESS)
109		systemShutdown(1);
110	}
111	if (argc > start_arg)
112	    systemShutdown(0);
113    }
114    else
115	dispatch_load_file_int(TRUE);
116
117    status = setjmp(BailOut);
118    if (status) {
119	msgConfirm("A signal %d was caught - I'm saving what I can and shutting\n"
120		   "If you can reproduce the problem, please turn Debug on in\n"
121		   "the Options menu for the extra information it provides in\n"
122		   "debugging problems like this.", status);
123	systemShutdown(status);
124    }
125
126    /* Begin user dialog at outer menu */
127    dialog_clear();
128    while (1) {
129	choice = scroll = curr = max = 0;
130	dmenuOpen(&MenuInitial, &choice, &scroll, &curr, &max, TRUE);
131	if (getpid() != 1
132#ifdef __alpha__
133	    || !msgYesNo("Are you sure you wish to exit?  The system will halt.")
134#else
135	    || !msgYesNo("Are you sure you wish to exit?  The system will reboot\n"
136		         "(be sure to remove any floppies from the drives).")
137#endif
138	    )
139	    break;
140    }
141
142    /* Say goodnight, Gracie */
143    systemShutdown(0);
144
145    return 0; /* We should never get here */
146}
147