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#include <alloca.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
#include "isys/isys.h"
#include "modules.h"
struct moduleDependency_s {
char * name;
char ** deps;
};
struct moduleList_s {
char * modules[50];
int numModules;
};
static int moduleLoaded(moduleList modList, const char * name);
int mlReadLoadedList(moduleList * mlp) {
int fd;
char * start;
char * end;
char buf[4096];
struct stat sb;
int i;
moduleList ml;
if ((fd = open("/proc/modules", O_RDONLY)) < 0)
return -1;
fstat(fd, &sb);
i = read(fd, buf, sizeof(buf));
buf[i] = '\0';
close(fd);
ml = malloc(sizeof(*ml));
ml->numModules = 0;
start = buf;
while (start && *start) {
end = start;
while (!isspace(*end) && *end != '\n') end++;
*end = '\0';
ml->modules[ml->numModules] = strdup(start);
*end = ' ';
ml->numModules++;
start = strchr(end, '\n');
if (start) start++;
}
*mlp = ml;
return 0;
}
void mlFreeList(moduleList ml) {
int i;
for (i = 0; i < ml->numModules; i++)
free(ml->modules[i]);
free(ml);
}
moduleDeps mlNewDeps(void) {
moduleDeps md;
md = malloc(sizeof(*md));
md->name = NULL;
md->deps = NULL;
return md;
}
int mlLoadDeps(moduleDeps moduleDepList, const char * path) {
int fd;
char * buf;
struct stat sb;
char * start, * end, * chptr;
int i, numItems;
moduleDeps nextDep;
fd = open(path, O_RDONLY);
if (fd < 0) {
return -1;
}
fstat(fd, &sb);
buf = alloca(sb.st_size + 1);
read(fd, buf, sb.st_size);
buf[sb.st_size] = '\0';
close(fd);
start = buf;
numItems = 0;
while (start) {
numItems++;
start = strchr(start + 1, '\n');
}
for (nextDep = moduleDepList; nextDep->name; nextDep++) numItems++;
moduleDepList = realloc(moduleDepList, sizeof(*moduleDepList) * numItems);
for (nextDep = moduleDepList; nextDep->name; nextDep++) ;
start = buf;
while (start < (buf + sb.st_size) && *start) {
end = strchr(start, '\n');
*end = '\0';
chptr = strchr(start, ':');
if (!chptr) {
start = end + 1;
continue;
}
*chptr++ = '\0';
while (*chptr && isspace(*chptr)) chptr++;
if (!*chptr) {
start = end + 1;
continue;
}
/* found something */
nextDep->name = strdup(start);
i = strlen(chptr) / 3;
nextDep->deps = malloc(sizeof(char **) * i);
start = chptr, i = 0;
while (start && *start) {
chptr = strchr(start, ' ');
if (chptr) *chptr = '\0';
nextDep->deps[i++] = strdup(start);
if (chptr)
start = chptr + 1;
else
start = NULL;
while (start && *start && isspace(*start)) start++;
}
nextDep++;
start = end + 1;
}
nextDep->name = NULL;
nextDep->deps = NULL;
moduleDepList = realloc(moduleDepList, sizeof(*moduleDepList) *
(nextDep - moduleDepList + 1));
return 0;
}
static int moduleLoaded(moduleList modList, const char * name) {
int i;
for (i = 0; i < modList->numModules; i++)
if (!strcmp(modList->modules[i], name)) return 1;
return 0;
}
int mlLoadModule(struct moduleInfo * modInfo, moduleList modLoaded,
moduleDeps modDeps) {
moduleDeps dep;
char ** nextDep;
for (dep = modDeps; dep->name && strcmp(dep->name, modInfo->moduleName);
dep++);
if (dep) {
nextDep = dep->deps;
while (*nextDep) {
if (!moduleLoaded(modLoaded, *nextDep)) {
insmod(*nextDep, NULL);
}
dep++;
}
}
return insmod(modInfo->moduleName, NULL);
}
char ** mlGetDeps(moduleDeps modDeps, const char * modName) {
moduleDeps dep;
for (dep = modDeps; dep->name && strcmp(dep->name, modName); dep++);
if (dep) return dep->deps;
return NULL;
}
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