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/*
* moduledeps.c - module dependency determination
*
* Erik Troan <ewt@redhat.com>
* Matt Wilson <msw@redhat.com>
* Michael Fulbright <msf@redhat.com>
* Jeremy Katz <katzj@redhat.com>
*
* Copyright 1999 - 2002 Red Hat, Inc.
*
* This software may be freely redistributed under the terms of the GNU
* General 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.
*/
#include <alloca.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <newt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
#include "moduledeps.h"
moduleDeps mlNewDeps(void) {
moduleDeps md;
md = malloc(sizeof(*md));
md->name = NULL;
md->deps = NULL;
return md;
}
/* JKFIXME: if we have a new module with different deps, this doesn't
* handle it correctly */
int mlLoadDeps(moduleDeps * moduleDepListPtr, const char * path) {
int fd;
char * buf;
struct stat sb;
char * start, * end, * chptr;
int i, numItems;
moduleDeps nextDep;
moduleDeps moduleDepList = *moduleDepListPtr;
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++) ;
/* We have to remove `\' first. */
start = buf;
start = strchr(start, '\\');
while (start) {
/* Replace `\\' with a space. */
*start++ = ' ';
/* Replace the following `\n' and `\r' with a space. */
if (*start == '\n') {
*start++ = ' ';
if (*start == '\r')
*start++ = ' ';
}
else if (*start == '\r') {
*start++ = ' ';
if (*start == '\n')
*start++ = ' ';
}
start = strchr(start, '\\');
}
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);
nextDep->deps = malloc(sizeof(char *) * (strlen(chptr) + 1));
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->deps[i] = NULL;
nextDep->deps = realloc(nextDep->deps, sizeof(char *) * (i + 1));
nextDep++;
start = end + 1;
}
nextDep->name = NULL;
nextDep->deps = NULL;
moduleDepList = realloc(moduleDepList, sizeof(*moduleDepList) *
(nextDep - moduleDepList + 1));
*moduleDepListPtr = moduleDepList;
return 0;
}
char ** mlGetDeps(moduleDeps modDeps, const char * modName) {
moduleDeps dep;
for (dep = modDeps; dep && dep->name && strcmp(dep->name, modName); dep++);
if (dep) return dep->deps;
return NULL;
}
/* fun test cases... */
#ifdef TESTING
void printDeps(moduleDeps modDeps) {
moduleDeps dep;
char buf[1024];
char **foo;
for (dep = modDeps; dep && dep->name; dep++) {
if (strcmp(dep->name, "pcnet32"))
continue;
if (!dep->deps)
printf("module: %s, no deps\n", dep->name);
else {
buf[0] = '\0';
for (foo = dep->deps; *foo; foo++) {
strcat(buf, *foo);
strcat(buf, " ");
}
printf("module: %s, deps: %s\n", dep->name, buf);
}
}
}
int main(int argc, char ** argv) {
moduleDeps deps;
deps = mlNewDeps();
printDeps(deps);
mlLoadDeps(&deps, "modules.dep.1");
printDeps(deps);
printf("----------------------------------------\n");
printf("Loading second set\n");
mlLoadDeps(&deps, "modules.dep.2");
printDeps(deps);
return 0;
}
#endif
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