summaryrefslogtreecommitdiffstats
path: root/mdk-stage1/stage1.c
blob: 8154b92864fc6c14b72f3e4e0542a213f256e633 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
/*
 * Guillaume Cottenceau (gc@mandrakesoft.com)
 *
 * Copyright 2000 MandrakeSoft
 *
 * View the homepage: http://us.mandrakesoft.com/~gc/html/stage1.html
 *
 *
 * This software may be freely redistributed under the terms of the GNU
 * public license.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

/*
 * Portions from Erik Troan (ewt@redhat.com)
 *
 * Copyright 1996 Red Hat Software 
 *
 */

#include <sys/mount.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>

#include "stage1.h"

#include "log.h"
#include "probing.h"
#include "frontend.h"
#include "modules.h"
#include "tools.h"
#include "automatic.h"
#include "mount.h"
#include "insmod-busybox/insmod.h"

#ifndef DISABLE_CDROM
#include "cdrom.h"
#endif

#ifndef DISABLE_NETWORK
#include "network.h"
#endif

#ifndef DISABLE_DISK
#include "disk.h"
#endif


/* globals */

char * method_name;


void fatal_error(char *msg)
{
	printf("FATAL ERROR IN STAGE1: %s\n\nI can't recover from this.\nYou may reboot your system.\n", msg);
	while (1);
}



/* spawns a shell on console #2 */
static void spawn_shell(void)
{
#ifdef SPAWN_SHELL
	int fd;
	pid_t pid;
	char * shell_name = "/sbin/sash";

	log_message("spawning a shell..");

	if (!IS_TESTING) {
		fd = open("/dev/tty2", O_RDWR);
		if (fd == -1) {
			log_message("cannot open /dev/tty2 -- no shell will be provided");
			return;
		}
		else if (access(shell_name, X_OK)) {
			log_message("cannot open shell - %s doesn't exist", shell_name);
			return;
		}
		
		if (!(pid = fork())) {
			dup2(fd, 0);
			dup2(fd, 1);
			dup2(fd, 2);
			
			close(fd);
			setsid();
			if (ioctl(0, TIOCSCTTY, NULL))
				log_perror("could not set new controlling tty");

			execl(shell_name, shell_name, NULL);
			log_message("execl of %s failed: %s", shell_name, strerror(errno));
		}
		
		close(fd);
	}
#endif
}


static void expert_third_party_modules(void)
{
	enum return_type results;
	char * floppy_mount_location = "/tmp/floppy";
	char ** modules;
	char final_name[500] = "/tmp/floppy/";
	char * choice;
	int rc;
	char * questions[] = { "Options", NULL };
	char ** answers;

	results = ask_yes_no("If you want to insert third-party kernel modules, insert "
			     "a Linux (ext2fs) formatted floppy containing the modules and confirm. Otherwise, select \"no\".");;
	if (results != RETURN_OK)
		return;
	
	if (my_mount("/dev/fd0", floppy_mount_location, "ext2") == -1) {
		error_message("I can't find a Linux ext2 floppy in first floppy drive.");
		return expert_third_party_modules();
	}

	modules = list_directory("/tmp/floppy");

	if (!modules || !*modules) {
		error_message("No modules found on floppy disk.");
		umount(floppy_mount_location);
		return expert_third_party_modules();
	}

	results = ask_from_list("Which driver would you like to insmod?", modules, &choice);
	if (results != RETURN_OK) {
		umount(floppy_mount_location);
		return;
	}

	strcat(final_name, choice);

	results = ask_from_entries("Please enter the options:", questions, &answers, 24);
	if (results != RETURN_OK) {
		umount(floppy_mount_location);
		return expert_third_party_modules();
	}

	rc = insmod_call(final_name, answers[0]);
	umount(floppy_mount_location);

	if (rc) {
		log_message("\tfailed.");
		error_message("Insmod failed.");
	}

	return expert_third_party_modules();
}

static enum return_type method_select_and_prepare(void)
{
	enum return_type results;
	char * choice;
	char * means[10], * means_auto[10];
	int i;

#ifndef DISABLE_DISK
	char * disk_install = "Hard disk"; char * disk_install_auto = "disk";
#endif
#ifndef DISABLE_CDROM
	char * cdrom_install = "CDROM drive"; char * cdrom_install_auto = "cdrom";
#endif
#ifndef DISABLE_NETWORK
	char * network_nfs_install = "NFS server"; char * network_nfs_install_auto = "nfs";
	char * network_ftp_install = "FTP server"; char * network_ftp_install_auto = "ftp";
	char * network_http_install = "HTTP server"; char * network_http_install_auto = "http";
#endif

	i = 0;
#ifndef DISABLE_NETWORK
	means[i] = network_nfs_install; means_auto[i++] = network_nfs_install_auto;
	means[i] = network_ftp_install; means_auto[i++] = network_ftp_install_auto;
	means[i] = network_http_install; means_auto[i++] = network_http_install_auto;
#endif
#ifndef DISABLE_CDROM
	means[i] = cdrom_install; means_auto[i++] = cdrom_install_auto;
#endif
#ifndef DISABLE_DISK
	means[i] = disk_install; means_auto[i++] = disk_install_auto;
#endif
	means[i] = NULL;

	results = ask_from_list_auto("Please choose the mean of installation.", means, &choice, "method", means_auto);

	if (results != RETURN_OK)
		return 	method_select_and_prepare();

	results = RETURN_ERROR;

#ifndef DISABLE_CDROM
	if (!strcmp(choice, cdrom_install))
		results = cdrom_prepare();
#endif
        
#ifndef DISABLE_DISK
	if (!strcmp(choice, disk_install))
		results = disk_prepare();
#endif
	
#ifndef DISABLE_NETWORK
	if (!strcmp(choice, network_nfs_install))
		results = nfs_prepare();
	
	if (!strcmp(choice, network_ftp_install))
		results = ftp_prepare();
	
	if (!strcmp(choice, network_http_install))
		results = http_prepare();
#endif

	if (results != RETURN_OK)
		return method_select_and_prepare();

	return RETURN_OK;
}


int main(int argc, char **argv, char **env)
{
	enum return_type ret;
	char ** argptr;
	char * stage2_args[30];

	if (getpid() > 50)
		set_param(MODE_TESTING);

	open_log();
	log_message("welcome to the " DISTRIB_NAME " install (stage1, version " VERSION " built " __DATE__ " " __TIME__")");
	process_cmdline();
	handle_env(env);
	spawn_shell();
	init_modules_insmoding();
	init_frontend();

	if (IS_EXPERT)
		expert_third_party_modules();

	ret = method_select_and_prepare();

	finish_frontend();
	close_log();

	if (ret != RETURN_OK)
		fatal_error("could not select an installation method");

	if (!IS_RAMDISK) {
		if (symlink(IMAGE_LOCATION LIVE_LOCATION, STAGE2_LOCATION) != 0)
			fatal_error("symlink to " STAGE2_LOCATION " failed");
	}

	if (IS_RESCUE) {
		int fd = open("/proc/sys/kernel/real-root-dev", O_RDWR);
#ifdef __sparc__
		write(fd, "0x1030000", sizeof("0x1030000")); /* ram3 or sparc */
#else
		write(fd, "0x103", sizeof("0x103")); /* ram3 */
#endif
		close(fd);
		return 0;
	}

	if (IS_TESTING)
		return 0;

	argptr = stage2_args;
	*argptr++ = "/usr/bin/runinstall2";
	*argptr++ = "--method";
	*argptr++ = method_name;
	*argptr++ = NULL;

	execve(stage2_args[0], stage2_args, grab_env());

	printf("error in exec of stage2 :-(\n");
	fatal_error(strerror(errno));
	
	return 0; /* shut up compiler (we can't get here anyway!) */
}