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authorRichard Yao <ryao@gentoo.org>2012-11-19 11:49:42 -0500
committerRichard Yao <ryao@cs.stonybrook.edu>2012-11-23 01:55:28 -0500
commitc4d1ce9b754e6eed60d2625cc4fff224898aa5d5 (patch)
treeb49d37e4dd0fc0c69686abf5c18ed8eb11369011 /src/udev/udev-builtin-kmod.c
parent135d61df6f66d0c0e67aec62f76ee7f2a409a3ce (diff)
Use libkmod only when requested
We support module loading through modprobe when libkmod is neither available nor wanted. Signed-off-by: Richard Yao <ryao@gentoo.org>
Diffstat (limited to 'src/udev/udev-builtin-kmod.c')
-rw-r--r--src/udev/udev-builtin-kmod.c21
1 files changed, 20 insertions, 1 deletions
diff --git a/src/udev/udev-builtin-kmod.c b/src/udev/udev-builtin-kmod.c
index 17aca2944d..89c7ab0b77 100644
--- a/src/udev/udev-builtin-kmod.c
+++ b/src/udev/udev-builtin-kmod.c
@@ -27,14 +27,19 @@
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/wait.h>
+
+#ifdef HAVE_LIBKMOD
#include <libkmod.h>
+#endif
#include "udev.h"
+#include "util.h"
static struct kmod_ctx *ctx;
-static int load_module(struct udev *udev, const char *alias)
+static int load_module(struct udev *udev, char *const alias)
{
+#ifdef HAVE_LIBKMOD
struct kmod_list *list = NULL;
struct kmod_list *l;
int err;
@@ -62,6 +67,10 @@ static int load_module(struct udev *udev, const char *alias)
kmod_module_unref_list(list);
return err;
+#else
+ char * const argv[] = { "-bq", alias, 0 };
+ return execute_command(MODPROBE, argv);
+#endif
}
static void udev_kmod_log(void *data, int priority, const char *file, int line,
@@ -75,8 +84,10 @@ static int builtin_kmod(struct udev_device *dev, int argc, char *argv[], bool te
struct udev *udev = udev_device_get_udev(dev);
int i;
+#ifdef HAVE_LIBKMOD
if (!ctx)
return 0;
+#endif
if (argc < 3 || strcmp(argv[1], "load")) {
log_error("expect: %s load <module>\n", argv[0]);
@@ -94,6 +105,7 @@ static int builtin_kmod(struct udev_device *dev, int argc, char *argv[], bool te
/* called at udev startup and reload */
static int builtin_kmod_init(struct udev *udev)
{
+#ifdef HAVE_LIBKMOD
if (ctx)
return 0;
@@ -104,16 +116,20 @@ static int builtin_kmod_init(struct udev *udev)
log_debug("load module index\n");
kmod_set_log_fn(ctx, udev_kmod_log, udev);
kmod_load_resources(ctx);
+#endif
return 0;
}
/* called on udev shutdown and reload request */
static void builtin_kmod_exit(struct udev *udev)
{
+#ifdef HAVE_LIBKMOD
log_debug("unload module index\n");
ctx = kmod_unref(ctx);
+#endif
}
+#ifdef HAVE_LIBKMOD
/* called every couple of seconds during event activity; 'true' if config has changed */
static bool builtin_kmod_validate(struct udev *udev)
{
@@ -122,13 +138,16 @@ static bool builtin_kmod_validate(struct udev *udev)
return false;
return (kmod_validate_resources(ctx) != KMOD_RESOURCES_OK);
}
+#endif
const struct udev_builtin udev_builtin_kmod = {
.name = "kmod",
.cmd = builtin_kmod,
.init = builtin_kmod_init,
.exit = builtin_kmod_exit,
+#ifdef HAVE_LIBKMOD
.validate = builtin_kmod_validate,
+#endif
.help = "kernel module loader",
.run_once = false,
};