main.c revision 26456 
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 1.45 1997/04/20 16:46:31 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	FILE *fp;
109	char buf[BUFSIZ];
110
111	fp = fopen("install.cfg", "r");
112	if (fp) {
113	    msgNotify("Loading pre-configuration file");
114	    variable_set2(VAR_NONINTERACTIVE, "YES");
115	    while (fgets(buf, sizeof buf, fp)) {
116		if (DITEM_STATUS(dispatchCommand(buf)) != DITEM_SUCCESS) {
117		    msgDebug("Command `%s' failed - rest of script aborted.\n", buf);
118		    break;
119		}
120	    }
121	    fclose(fp);
122	    variable_unset(VAR_NONINTERACTIVE);
123	}
124    }
125
126    status = setjmp(BailOut);
127    if (status) {
128	msgConfirm("A signal %d was caught - I'm saving what I can and shutting\n"
129		   "this thing down!  Please report this unfortunate incident\n"
130		   "to jkh@FreeBSD.org.  If you can reproduce the problem, please\n"
131		   "also turn Debug on in the Options menu for the extra information\n"
132		   "it provides in debugging problems like this.  Thanks!", status);
133	systemShutdown(status);
134    }
135
136    /* Begin user dialog at outer menu */
137    dialog_clear();
138    while (1) {
139	choice = scroll = curr = max = 0;
140	dmenuOpen(&MenuInitial, &choice, &scroll, &curr, &max, TRUE);
141	if (getpid() != 1 || !msgYesNo("Are you sure you wish to exit?  The system will reboot\n"
142				       "(be sure to remove any floppies from the drives)."))
143	    break;
144    }
145
146    /* Say goodnight, Gracie */
147    systemShutdown(0);
148
149    return 0; /* We should never get here */
150}
151