add udevtrigger tool

[project/procd.git] / instance.c

diff --git a/instance.c b/instance.c
index 70380af..112db6f 100644 (file)
--- a/instance.c
+++ b/instance.c
@@ -1,17 +1,23 @@
+#include <sys/resource.h>
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <net/if.h>
 #include <unistd.h>
+#include <stdint.h>
+#include <fcntl.h>
 
 #include "procd.h"
 #include "service.h"
 #include "instance.h"
+#include "md5.h"
 
 enum {
        INSTANCE_ATTR_COMMAND,
        INSTANCE_ATTR_ENV,
        INSTANCE_ATTR_DATA,
        INSTANCE_ATTR_NETDEV,
+       INSTANCE_ATTR_FILE,
+       INSTANCE_ATTR_NICE,
        __INSTANCE_ATTR_MAX
 };
 
@@ -20,6 +26,8 @@ static const struct blobmsg_policy instance_attr[__INSTANCE_ATTR_MAX] = {
        [INSTANCE_ATTR_ENV] = { "env", BLOBMSG_TYPE_TABLE },
        [INSTANCE_ATTR_DATA] = { "data", BLOBMSG_TYPE_TABLE },
        [INSTANCE_ATTR_NETDEV] = { "netdev", BLOBMSG_TYPE_ARRAY },
+       [INSTANCE_ATTR_FILE] = { "file", BLOBMSG_TYPE_ARRAY },
+       [INSTANCE_ATTR_NICE] = { "nice", BLOBMSG_TYPE_INT32 },
 };
 
 struct instance_netdev {
@@ -27,6 +35,11 @@ struct instance_netdev {
        int ifindex;
 };
 
+struct instance_file {
+       struct blobmsg_list_node node;
+       uint32_t md5[4];
+};
+
 static void
 instance_run(struct service_instance *in)
 {
@@ -36,6 +49,9 @@ instance_run(struct service_instance *in)
        int argc = 1; /* NULL terminated */
        int rem;
 
+       if (in->nice)
+               setpriority(PRIO_PROCESS, 0, in->nice);
+
        blobmsg_for_each_attr(cur, in->command, rem)
                argc++;
 
@@ -129,6 +145,12 @@ instance_config_changed(struct service_instance *in, struct service_instance *in
        if (!blobmsg_list_equal(&in->netdev, &in_new->netdev))
                return true;
 
+       if (!blobmsg_list_equal(&in->file, &in_new->file))
+               return true;
+
+       if (in->nice != in_new->nice)
+               return true;
+
        return false;
 }
 
@@ -150,6 +172,67 @@ instance_netdev_update(struct blobmsg_list_node *l)
 }
 
 static bool
+instance_file_cmp(struct blobmsg_list_node *l1, struct blobmsg_list_node *l2)
+{
+       struct instance_file *f1 = container_of(l1, struct instance_file, node);
+       struct instance_file *f2 = container_of(l2, struct instance_file, node);
+
+       return !memcmp(f1->md5, f2->md5, sizeof(f1->md5));
+}
+
+static void
+instance_file_update(struct blobmsg_list_node *l)
+{
+       struct instance_file *f = container_of(l, struct instance_file, node);
+       md5_ctx_t md5;
+       char buf[256];
+       int len, fd;
+
+       memset(f->md5, 0, sizeof(f->md5));
+
+       fd = open(l->avl.key, O_RDONLY);
+       if (fd < 0)
+               return;
+
+       md5_begin(&md5);
+       do {
+               len = read(fd, buf, sizeof(buf));
+               if (len < 0) {
+                       if (errno == EINTR)
+                               continue;
+
+                       break;
+               }
+               if (!len)
+                       break;
+
+               md5_hash(buf, len, &md5);
+       } while(1);
+
+       md5_end(f->md5, &md5);
+       close(fd);
+}
+
+static bool
+instance_fill_array(struct blobmsg_list *l, struct blob_attr *cur, blobmsg_update_cb cb, bool array)
+{
+       struct blobmsg_list_node *node;
+
+       if (!cur)
+               return true;
+
+       if (!blobmsg_check_attr_list(cur, BLOBMSG_TYPE_STRING))
+               return false;
+
+       blobmsg_list_fill(l, blobmsg_data(cur), blobmsg_data_len(cur), array);
+       if (cb) {
+               blobmsg_list_for_each(l, node)
+                       cb(node);
+       }
+       return true;
+}
+
+static bool
 instance_config_parse(struct service_instance *in)
 {
        struct blob_attr *tb[__INSTANCE_ATTR_MAX];
@@ -176,30 +259,23 @@ instance_config_parse(struct service_instance *in)
 
        in->command = cur;
 
-       if ((cur = tb[INSTANCE_ATTR_ENV])) {
-               if (!blobmsg_check_attr_list(cur, BLOBMSG_TYPE_STRING))
+       if ((cur = tb[INSTANCE_ATTR_NICE])) {
+               in->nice = (int8_t) blobmsg_get_u32(cur);
+               if (in->nice < -20 || in->nice > 20)
                        return false;
-
-               blobmsg_list_fill(&in->env, blobmsg_data(cur), blobmsg_data_len(cur), false);
        }
 
-       if ((cur = tb[INSTANCE_ATTR_DATA])) {
-               if (!blobmsg_check_attr_list(cur, BLOBMSG_TYPE_STRING))
-                       return false;
-
-               blobmsg_list_fill(&in->data, blobmsg_data(cur), blobmsg_data_len(cur), false);
-       }
+       if (!instance_fill_array(&in->env, tb[INSTANCE_ATTR_ENV], NULL, false))
+               return false;
 
-       if ((cur = tb[INSTANCE_ATTR_NETDEV])) {
-               struct blobmsg_list_node *ndev;
+       if (!instance_fill_array(&in->data, tb[INSTANCE_ATTR_DATA], NULL, false))
+               return false;
 
-               if (!blobmsg_check_attr_list(cur, BLOBMSG_TYPE_STRING))
-                       return false;
+       if (!instance_fill_array(&in->netdev, tb[INSTANCE_ATTR_NETDEV], instance_netdev_update, true))
+               return false;
 
-               blobmsg_list_fill(&in->netdev, blobmsg_data(cur), blobmsg_data_len(cur), true);
-               blobmsg_list_for_each(&in->netdev, ndev)
-                       instance_netdev_update(ndev);
-       }
+       if (!instance_fill_array(&in->file, tb[INSTANCE_ATTR_FILE], instance_file_update, true))
+               return false;
 
        return true;
 }
@@ -222,6 +298,8 @@ instance_config_move(struct service_instance *in, struct service_instance *in_sr
        in->command = in_src->command;
        in->name = in_src->name;
        in->node.avl.key = in_src->node.avl.key;
+
+       free(in->config);
        in->config = in_src->config;
        in_src->config = NULL;
 }
@@ -261,6 +339,7 @@ instance_init(struct service_instance *in, struct service *s, struct blob_attr *
        in->proc.cb = instance_exit;
 
        blobmsg_list_init(&in->netdev, struct instance_netdev, node, instance_netdev_cmp);
+       blobmsg_list_init(&in->file, struct instance_file, node, instance_file_cmp);
        blobmsg_list_simple_init(&in->env);
        blobmsg_list_simple_init(&in->data);
        in->valid = instance_config_parse(in);