Annotation of prex-old/usr/server/boot/main.c, Revision 1.1.1.1.2.1
1.1 nbrk 1: /*-
2: * Copyright (c) 2005-2007, Kohsuke Ohtani
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. Neither the name of the author nor the names of any co-contributors
14: * may be used to endorse or promote products derived from this software
15: * without specific prior written permission.
16: *
17: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27: * SUCH DAMAGE.
28: */
29:
30: /*
31: * main.c - bootstrap server
32: */
33:
34: /*
1.1.1.1.2.1! nbrk 35: * A bootstrap server works to setup the POSIX environment for
! 36: * 'init' process. It sends a setup message to other servers in
! 37: * order to let them know that this task becomes 'init' process.
! 38: * The bootstrap server is gone after it launches (exec) the
! 39: * 'init' process.
1.1 nbrk 40: */
41:
42: #include <prex/prex.h>
43: #include <sys/mount.h>
44: #include <server/fs.h>
45: #include <server/object.h>
46: #include <server/exec.h>
47: #include <server/proc.h>
48: #include <server/stdmsg.h>
49:
50: #include <unistd.h>
51: #include <string.h>
52: #include <stdlib.h>
53: #include <stdio.h>
54: #include <signal.h>
55: #include <errno.h>
56: #include <fstab.h>
57:
1.1.1.1.2.1! nbrk 58: #ifdef DEBUG
! 59: #define DPRINTF(a) sys_log a
! 60: #else
! 61: #define DPRINTF(a)
! 62: #endif
! 63:
1.1 nbrk 64: extern const struct fstab fstab[];
65: extern const int fstab_size;
66:
67: #define PRIO_BOOT 131 /* priority of boot server */
68:
69: /* forward declarations */
1.1.1.1.2.1! nbrk 70: static void wait_server(const char *);
! 71: static void process_init(void);
! 72: static int run_init(char *);
! 73: static void mount_fs(void);
1.1 nbrk 74:
75: static object_t proc_obj;
76:
77: static char *init_argv[] = { "arg", NULL };
78: static char *init_envp[] = { "HOME=/", NULL };
79:
1.1.1.1.2.1! nbrk 80: /*
! 81: * Base directories
! 82: */
1.1 nbrk 83: static char *base_dir[] = {
84: "/bin", /* essential user commands */
85: "/boot", /* static files for boot */
86: "/dev", /* device files */
87: "/etc", /* system conifguration */
88: "/mnt", /* mount point for file systems */
89: "/mnt/floppy", /* mount point for floppy */
90: "/mnt/cdrom", /* mount point for cdrom */
1.1.1.1.2.1! nbrk 91: "/fifo", /* mount point for fifo */
1.1 nbrk 92: "/tmp", /* temporary files */
93: "/usr", /* shareable read-only data */
94: "/var", /* log files, spool data */
95: NULL
96: };
97:
98: /*
1.1.1.1.2.1! nbrk 99: * Main routine for boot strap.
1.1 nbrk 100: */
101: int
102: main(int argc, char *argv[])
103: {
104:
105: sys_log("Starting Bootstrap Server\n");
106:
107: /*
108: * Boost current priority.
109: */
110: thread_setprio(thread_self(), PRIO_BOOT);
111:
112: /*
1.1.1.1.2.1! nbrk 113: * Wait until required system servers
! 114: * become available.
1.1 nbrk 115: */
116: wait_server(OBJNAME_PROC);
117: wait_server(OBJNAME_FS);
118: wait_server(OBJNAME_EXEC);
119:
120: /*
121: * Register this task to other servers.
122: */
123: process_init();
124: fslib_init();
125:
126: /*
127: * Mount file systems
128: */
129: mount_fs();
130:
131: /*
132: * Run init process
133: */
134: run_init("/boot/init");
135:
1.1.1.1.2.1! nbrk 136: sys_panic("boot: failed to run init");
! 137: /* NOTREACHED */
1.1 nbrk 138: return 0;
139: }
140:
141: /*
142: * Wait until specified server starts.
143: */
144: static void
145: wait_server(const char *name)
146: {
147: int i, err = 0;
148: object_t obj = 0;
149:
150: thread_yield();
151:
152: /*
153: * Wait for server loading. timeout is 2 sec.
154: */
155: for (i = 0; i < 200; i++) {
156: err = object_lookup((char *)name, &obj);
157: if (err == 0)
158: break;
159:
160: /* Wait 10msec */
161: timer_sleep(10, 0);
162: thread_yield();
163: }
164: if (err)
165: sys_panic("boot: server not found");
166: }
167:
1.1.1.1.2.1! nbrk 168: /*
! 169: * Notify the process server.
! 170: */
1.1 nbrk 171: static void
172: process_init(void)
173: {
174: struct msg m;
175:
176: /*
1.1.1.1.2.1! nbrk 177: * We will become an init process later.
1.1 nbrk 178: */
179: object_lookup(OBJNAME_PROC, &proc_obj);
180: m.hdr.code = PS_SETINIT;
181: msg_send(proc_obj, &m, sizeof(m));
182: }
183:
184: /*
185: * Run init process
186: */
187: static int
188: run_init(char *path)
189: {
190: struct exec_msg *msg;
191: int err, i, argc, envc;
192: size_t bufsz;
193: char *dest, *src;
194: object_t obj;
195:
1.1.1.1.2.1! nbrk 196: DPRINTF(("boot: Run init process\n"));
1.1 nbrk 197:
198: /*
199: * Allocate a message buffer with arg/env data.
200: */
201: bufsz = 0;
202: argc = 0;
1.1.1.1.2.1! nbrk 203: while (init_argv[argc] != NULL) {
1.1 nbrk 204: bufsz += (strlen(init_argv[argc]) + 1);
205: argc++;
206: }
207: envc = 0;
1.1.1.1.2.1! nbrk 208: while (init_envp[envc] != NULL) {
1.1 nbrk 209: bufsz += (strlen(init_envp[envc]) + 1);
210: envc++;
211: }
1.1.1.1.2.1! nbrk 212: msg = malloc(sizeof(struct exec_msg) + bufsz);
1.1 nbrk 213: if (msg == NULL)
214: return -1;
215:
216: /*
217: * Build exec message.
218: */
219: dest = (char *)&msg->buf;
220: for (i = 0; i < argc; i++) {
221: src = init_argv[i];
222: while ((*dest++ = *src++) != 0);
223: }
224: for (i = 0; i < envc; i++) {
225: src = init_envp[i];
226: while ((*dest++ = *src++) != 0);
227: }
228: msg->argc = argc;
229: msg->envc = envc;
230: msg->bufsz = bufsz;
231: strcpy((char *)&msg->path, path);
232:
233: /*
234: * Request exec() to exec server
235: */
236: object_lookup(OBJNAME_EXEC, &obj);
237: do {
238: msg->hdr.code = EX_EXEC;
239: err = msg_send(obj, msg,
240: sizeof(struct exec_msg) + bufsz);
241: /*
1.1.1.1.2.1! nbrk 242: * If exec server can execute new process
! 243: * properly, it will terminate the caller task
! 244: * automatically. So, the control never comes
! 245: * here in that case.
1.1 nbrk 246: */
247: } while (err == EINTR);
248: return -1;
249: }
250:
251: static void
252: mount_fs(void)
253: {
254: int i;
255:
1.1.1.1.2.1! nbrk 256: DPRINTF(("boot: Mounting file systems\n"));
1.1 nbrk 257:
258: /*
259: * Mount RAMFS as root file system.
260: */
261: if (mount("", "/", "ramfs", 0, NULL) < 0)
262: sys_panic("boot: mount failed");
263:
264: /*
265: * Create some default directories on RAMFS.
266: */
1.1.1.1.2.1! nbrk 267: i = 0;
! 268: while (base_dir[i] != NULL) {
1.1 nbrk 269: mkdir(base_dir[i], 0);
1.1.1.1.2.1! nbrk 270: i++;
1.1 nbrk 271: }
272:
273: /*
274: * Mount other file systems.
275: */
276: for (i = 0; i < fstab_size; i++) {
277: mount(fstab[i].fs_spec, fstab[i].fs_file,
278: fstab[i].fs_vfstype, 0, (void *)fstab[i].fs_mntops);
279: }
280: }
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