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/*
* Copyright (c) 1997-1999 University of Utah and the Flux Group.
* All rights reserved.
*
* This file is part of the Flux OSKit. The OSKit is free software, also known
* as "open source;" you can redistribute it and/or modify it under the terms
* of the GNU General Public License (GPL), version 2, as published by the Free
* Software Foundation (FSF). To explore alternate licensing terms, contact
* the University of Utah at csl-dist@cs.utah.edu or +1-801-585-3271.
*
* The OSKit is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GPL for more details. You should have
* received a copy of the GPL along with the OSKit; see the file COPYING. If
* not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
*/
/*
* Convenience function to start up clock, disk filesystem, swap, and network.
*/
#include <oskit/startup.h>
#include <oskit/c/stdio.h>
#include <oskit/c/stdlib.h>
#include <oskit/c/string.h>
#include <oskit/c/unistd.h>
#include <oskit/c/sys/types.h>
#include <oskit/c/sys/stat.h>
#include <oskit/c/ctype.h>
#include <oskit/io/absio.h>
#include <oskit/io/blkio.h>
#include <oskit/c/fs.h>
#include <oskit/fs/memfs.h>
#include <oskit/svm.h>
#include <oskit/clientos.h>
#include <oskit/com/libcenv.h>
#ifdef PTHREADS
#include <oskit/threads/pthread.h>
#define start_world start_world_pthreads
#define start_console start_console_pthreads
#define start_network start_network_pthreads
#define start_fs start_fs_pthreads
#define start_fs_on_blkio start_fs_on_blkio_pthreads
#define start_fs_bmod start_fs_bmod_pthreads
#define start_svm start_svm_pthreads
#define start_svm_on_blkio start_svm_on_blkio_pthreads
#endif
static int disk_option(const char *option, const char *ro_option,
oskit_blkio_t **out_bio);
void
start_world(void)
{
oskit_blkio_t *bio;
oskit_error_t rc;
static int run;
if (run)
return;
run = 1;
/*
* Initialize the startup library atexit code.
*/
startup_atexit_init();
/*
* Start the system clock.
*/
start_clock();
#ifdef PTHREADS
start_pthreads();
#else
#define osenv_process_lock() ((void)0)
#define osenv_process_unlock() ((void)0)
#endif
/*
* Initialize and probe device drivers.
*/
osenv_process_lock();
start_devices();
osenv_process_unlock();
/*
* If we have a "root=device" argument, start the disk filesystem.
*/
if (disk_option("root", "read-only", &bio)) {
start_fs_on_blkio(bio);
if (getenv("no-bmod"))
goto skipbmod;
/*
* Mount the bmod also, in a well-known place.
*/
if (mkdir("/bmod", 0) < 0 && errno != EEXIST) {
perror("start_world: Could not mkdir /bmod\n");
goto skipbmod;
}
if ((rc = fs_mount("/bmod",
(oskit_file_t *) start_bmod())) != 0)
printf("start_world: fs_mount failed\n");
skipbmod:
}
else {
/*
* Otherwise just set up the bmod filesystem.
*/
start_fs_bmod();
/*
* Create its well-known name.
*/
if (symlink("/", "/bmod") < 0)
perror("start_world: Could not symlink /bmod --> /\n");
}
/*
* If we have a "swap=device" argument, start paging to that disk.
*/
if (disk_option("swap", 0, &bio)) {
start_svm_on_blkio((oskit_blkio_t *) bio);
/*
* Don't need the partition anymore, SVM has a ref.
*/
oskit_blkio_release(bio);
}
else if (!getenv("no-svm")) {
/*
* Otherwise, no paging.
*/
start_svm((char *) NULL, (char *) NULL);
}
/*
* Start the network.
*/
if (!getenv("no-network"))
start_network();
#ifdef GPROF
/*
* Fire up the gprof support.
*/
start_gprof();
#endif
}
/*
* Check for an environment variable named by `option' whose value
* is a disk device/partition name in some vaguely canonical format.
* Return nonzero iff *out_bio is the successfully opened disk partition.
* This tries to grok either BSD and Linux device and (optional)
* partition syntax, or any combination of flavors, and strips
* a leading "/dev/" which people like to prepend to the device name.
*/
static int
disk_option(const char *option, const char *ro_option,
oskit_blkio_t **out_bio)
{
int rc;
char *s, *disk, *part;
s = getenv(option);
if (!s)
return 0;
if (!strncmp(s, "/dev/", 5))
s += 5;
disk = strdup(s);
if (disk[0] == 'w' && disk[1] == 'd') /* BSD wd => Linux hd */
disk[0] = 'h';
if (disk[1] == 'd' && (disk[0] == 's' || disk[0] == 'h')) {
if (isdigit(disk[2])) /* linux uses hda, not hd0 */
disk[2] = disk[2] - '0' + 'a';
if (disk[3] == '\0')
part = 0; /* use whole disk */
else if (isdigit(disk[3])) {
/* insert "s" for slice syntax */
part = strdup(&disk[2]);
part[0] = 's';
disk[3] = '\0'; /* terminate disk */
}
else {
part = strdup(&disk[3]);
disk[3] = '\0';
}
}
else {
/*
* Can't guess syntax, presume it was for whole disk.
*/
disk = s;
part = 0;
}
osenv_process_lock();
rc = start_disk(disk, part, ro_option && getenv(ro_option),
out_bio);
osenv_process_unlock();
free(disk);
if (part)
free(part);
if (rc) {
printf("start_disk() failed: errno 0x%x\n", rc);
exit(rc);
}
return 1;
}
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