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/*
* modstubs.c - stubs around modutils commands
*
* 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 <stdio.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <stdlib.h>
#include <sys/utsname.h>
#include <sys/wait.h>
#include <sys/mman.h>
#include "log.h"
#include "modstubs.h"
#include "modules.h"
#include "../isys/cpio.h"
#include "../isys/stubs.h"
extern long init_module(void *, unsigned long, const char *);
extern long delete_module(const char *, unsigned int);
static int usage() {
fprintf(stderr, "usage: insmod [-p <path>] <module>.ko\n");
return 1;
}
static int rmmod_usage() {
fprintf(stderr, "usage: rmmod <module>\n");
return 1;
}
static char * extractModule(char * file, char * ballPath, int version,
int *rmObj) {
gzFile fd;
/* Make finaleName and fullName REALLY static, otherwise they get dropped
from the stack after the function returns and the addresses are no
longer valid. */
static char finalName[100], fullName[100];
char * chptr = NULL;
if (access(file, R_OK)) {
/* it might be having a ball */
fd = gunzip_open(ballPath);
if (!fd)
return NULL;
chptr = strrchr(file, '/');
if (chptr) file = chptr + 1;
sprintf(finalName, "/tmp/%s", file);
/* XXX: leak */
sprintf(fullName, "%s/%s", getModuleLocation(version), file);
if (installCpioFile(fd, fullName, finalName, 0))
return NULL;
*rmObj = 1;
file = finalName;
}
return file;
}
int ourInsmodCommand(int argc, char ** argv) {
char * file;
int rc, rmObj = 0;
char * ballPath = NULL;
int version = 1;
int fd;
void * modbuf = NULL;
struct stat sb;
if (argc < 2) {
return usage();
}
while (argc > 2) {
if (!strcmp(argv[1], "-p")) {
ballPath = malloc(strlen(argv[2]) + 30);
sprintf(ballPath, "%s/modules.cgz", argv[2]);
argv += 2;
argc -= 2;
} else if (!strcmp(argv[1], "--modballversion")) {
version = atoi(argv[2]);
argv += 2;
argc -= 2;
} else {
break;
}
}
if (!ballPath) {
ballPath = strdup("/modules/modules.cgz");
}
file = extractModule(argv[1], ballPath, version, &rmObj);
free(ballPath);
if (stat(file, &sb) == -1) {
logMessage(ERROR, "unable to stat file %s: %s", file, strerror(errno));
return 1;
}
fd = open(file, O_RDONLY);
if (fd < 0) {
logMessage(ERROR, "unable to open file %s: %s", file, strerror(errno));
return 1;
}
modbuf = mmap(0, sb.st_size, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
if (modbuf == NULL) {
logMessage(ERROR, "error reading file %s: %s", file, strerror(errno));
return 1;
}
if (argc > 2) {
/* FIXME: only allows one param */
rc = init_module(modbuf, sb.st_size, argv[2]);
} else {
rc = init_module(modbuf, sb.st_size, "");
}
if (rc != 0)
logMessage(WARNING, "failed to insert module (%d)", errno);
return rc;
}
int ourRmmodCommand(int argc, char ** argv) {
if (argc < 2) {
return rmmod_usage();
}
return rmmod(argv[1]);
}
static char * modNameMunge(char * mod) {
unsigned int i;
for (i = 0; mod[i]; i++) {
if (mod[i] == '-')
mod[i] = '_';
}
return mod;
}
int rmmod(char * modName) {
pid_t child;
int status;
int rc = 0;
modName = modNameMunge(modName);
if ((child = fork()) == 0) {
rc = delete_module(modName, O_NONBLOCK|O_EXCL);
exit(rc);
}
waitpid(child, &status, 0);
if (WIFEXITED(status))
rc = WEXITSTATUS(status);
else
rc = -1;
return rc;
}
int insmod(char * modName, char * path, char ** args) {
int argc;
char ** argv;
int rc = 0;
pid_t child;
int status;
int count;
argc = 0;
for (argv = args; argv && *argv; argv++, argc++);
argv = alloca(sizeof(*argv) * (argc + 5));
argv[0] = "/bin/insmod";
count = 1;
if (path) {
argv[1] = "-p";
argv[2] = path;
count += 2;
}
argv[count] = modName;
count++;
if (args)
memcpy(argv + count, args, sizeof(*args) * argc);
argv[argc + count] = NULL;
argc += count;
if ((child = fork()) == 0) {
exit(ourInsmodCommand(argc, argv));
}
waitpid(child, &status, 0);
if (WIFEXITED(status))
rc = WEXITSTATUS(status);
else
rc = -1;
return rc;
}
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