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/*
* Guillaume Cottenceau (gc@mandrakesoft.com)
*
* Copyright 2000 MandrakeSoft
*
* 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.
*
*/
/*
* (1) calculate dependencies
* (2) unarchive relevant modules
* (3) insmod them
*/
#include <stdlib.h>
#include <unistd.h>
#include "insmod-busybox/insmod.h"
#include "stage1.h"
#include "log.h"
#include "mar/mar-extract-only.h"
#include "frontend.h"
#include "modules.h"
static struct module_deps_elem * modules_deps = NULL;
/* unarchive and insmod given module
* WARNING: module must not contain the trailing ".o"
*/
int insmod_archived_file(char * mod_name)
{
char * archive_name = "/modules/modules.mar";
char module_name[50];
char final_name[50] = "/tmp/";
static struct mar_stream s = { 0, NULL, NULL };
int i;
/* don't consume too much memory */
if (s.first_element == NULL) {
if (mar_open_file(archive_name, &s) != 0) {
log_message("open marfile failed");
return -1;
}
}
strncpy(module_name, mod_name, sizeof(module_name));
strncat(module_name, ".o", sizeof(module_name));
i = mar_extract_file(&s, module_name, "/tmp/");
if (i == 1) {
log_message("file-not-found-in-archive %s", module_name);
return -1;
}
if (i != 0)
return -1;
strncat(final_name, mod_name, sizeof(final_name));
strncat(final_name, ".o", sizeof(final_name));
return insmod_call(final_name);
}
int load_modules_dependencies(void)
{
char * deps_file = "/modules/modules.dep";
char * buf, * ptr, * start, * end;
struct stat s;
int fd, line, i;
log_message("loading modules dependencies");
if (IS_TESTING)
return 0;
fd = open(deps_file, O_RDONLY);
if (fd == -1) {
log_perror(deps_file);
return -1;
}
fstat(fd, &s);
buf = alloca(s.st_size + 1);
if (read(fd, buf, s.st_size) != s.st_size) {
log_perror(deps_file);
return -1;
}
buf[s.st_size] = '\0';
close(fd);
ptr = buf;
line = 0;
while (ptr) {
line++;
ptr = strchr(ptr + 1, '\n');
}
modules_deps = malloc(sizeof(*modules_deps) * (line+1));
start = buf;
line = 0;
while (start < (buf+s.st_size) && *start) {
char * tmp_deps[50];
end = strchr(start, '\n');
*end = '\0';
ptr = strchr(start, ':');
if (!ptr) {
start = end + 1;
continue;
}
*ptr = '\0';
ptr++;
while (*ptr && (*ptr == ' ')) ptr++;
if (!*ptr) {
start = end + 1;
continue;
}
/* sort of a good line */
modules_deps[line].name = strdup(start);
start = ptr;
i = 0;
while (start && *start) {
ptr = strchr(start, ' ');
if (ptr) *ptr = '\0';
tmp_deps[i] = strdup(start);
if (ptr)
start = ptr + 1;
else
start = NULL;
i++;
while (start && *start && *start == ' ')
start++;
}
tmp_deps[i] = NULL;
modules_deps[line].deps = (char **) malloc(sizeof(char *) * (i+1));
memcpy(modules_deps[line].deps, tmp_deps, sizeof(char *) * (i+1));
line++;
start = end + 1;
}
modules_deps[line].name = NULL;
return 0;
}
int insmod_with_deps(char * mod_name)
{
struct module_deps_elem * dep;
dep = modules_deps;
while (dep && dep->name && strcmp(dep->name, mod_name)) dep++;
if (dep && dep->name && dep->deps) {
char ** one_dep;
one_dep = dep->deps;
while (*one_dep) {
/* here, we can fail but we don't care, if the error is
* important, the desired module will fail also */
insmod_with_deps(*one_dep);
one_dep++;
}
}
log_message("needs %s", mod_name);
return insmod_archived_file(mod_name);
}
int my_insmod(char * mod_name)
{
int i;
log_message("have to insmod %s", mod_name);
if (IS_TESTING)
return 0;
i = insmod_with_deps(mod_name);
if (i == 0)
log_message("\tsucceeded %s.", mod_name);
return i;
}
enum return_type ask_scsi_insmod(void)
{
error_message("Try to load a SCSI module");
return RETURN_OK;
}
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