[PATCH] replace fgets() with mmap() and introduce udev_lib.[hc]

[elogind.git] / udevdb.c

diff --git a/udevdb.c b/udevdb.c
index 2d99f51d0e4ef819efc0b1638a3910db7b23c092..40580e5a3b885550abd794258e3aaff9e96dd63e 100644 (file)
--- a/udevdb.c
+++ b/udevdb.c
@@ -1,5 +1,5 @@
 /*
- * udevdb.c
+ * udevdb.c - udev database library
  *
  * Userspace devfs
  *
@@ -21,25 +21,25 @@
  *
  */
 
-/*
- * udev database library
- */
 #define _KLIBC_HAS_ARCH_SIG_ATOMIC_T
 #include <stdlib.h>
 #include <stdio.h>
+#include <string.h>
+#include <stddef.h>
 #include <fcntl.h>
 #include <string.h>
 #include <sys/stat.h>
 #include <errno.h>
 #include <signal.h>
 
-#include "udev_version.h"
+#include "libsysfs/sysfs/libsysfs.h"
 #include "udev.h"
+#include "udev_lib.h"
+#include "udev_version.h"
 #include "logging.h"
 #include "namedev.h"
 #include "udevdb.h"
 #include "tdb/tdb.h"
-#include "libsysfs/libsysfs.h"
 
 static TDB_CONTEXT *udevdb;
 
@@ -53,13 +53,13 @@ int udevdb_add_dev(const char *path, const struct udevice *dev)
                return -ENODEV;
 
        memset(keystr, 0, NAME_SIZE);
-       strcpy(keystr, path);
+       strfieldcpy(keystr, path);
        key.dptr = keystr;
        key.dsize = strlen(keystr) + 1;
 
        data.dptr = (void *)dev;
-       data.dsize = sizeof(*dev);
-       
+       data.dsize = UDEVICE_LEN;
+
        return tdb_store(udevdb, key, data, TDB_REPLACE); 
 }
 
@@ -77,7 +77,8 @@ int udevdb_get_dev(const char *path, struct udevice *dev)
        if (data.dptr == NULL || data.dsize == 0)
                return -ENODEV;
 
-       memcpy(dev, data.dptr, sizeof(*dev));
+       memset(dev, 0, sizeof(struct udevice));
+       memcpy(dev, data.dptr, UDEVICE_LEN);
        return 0;
 }
 
@@ -90,7 +91,7 @@ int udevdb_delete_dev(const char *path)
                return -EINVAL;
 
        memset(keystr, 0, sizeof(keystr));
-       strcpy(keystr, path);
+       strfieldcpy(keystr, path);
 
        key.dptr = keystr;
        key.dsize = strlen(keystr) + 1;
@@ -143,25 +144,78 @@ int udevdb_open_ro(void)
        return 0;
 }
 
-void (*user_record_callback) (char *path, struct udevice *dev);
+static int (*user_record_callback) (char *path, struct udevice *dev);
 
 static int traverse_callback(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA dbuf, void *state)
 {
-       user_record_callback((char*) key.dptr, (struct udevice*) dbuf.dptr);
-       return 0;
+       return user_record_callback((char*) key.dptr, (struct udevice*) dbuf.dptr);
 }
 
 /**
- * udevdb_dump: dumps whole database by passing record data to user function
+ * udevdb_call_foreach: dumps whole database by passing record data to user function
  * @user_record_handler: user function called for every record in the database
  */
-int udevdb_dump(void (*user_record_handler) (char *path, struct udevice *dev))
+int udevdb_call_foreach(int (*user_record_handler) (char *path, struct udevice *dev))
 {
+       int retval = 0;
+
        if (user_record_handler == NULL) {
                dbg("invalid user record handling function");
                return -EINVAL;
        }
        user_record_callback = user_record_handler;
-       tdb_traverse(udevdb, traverse_callback, NULL);
+       retval = tdb_traverse(udevdb, traverse_callback, NULL);
+       if (retval < 0)
+               return -ENODEV;
+       else
+               return 0;
+}
+
+static struct udevice *find_dev;
+static char *find_path;
+static const char *find_name;
+static int find_found;
+
+static int find_device_by_name(char *path, struct udevice *dev)
+{
+       char *pos;
+       int len;
+
+       if (strncmp(dev->name, find_name, sizeof(dev->name)) == 0) {
+               memcpy(find_dev, dev, sizeof(struct udevice));
+               strfieldcpymax(find_path, path, NAME_SIZE);
+               find_found = 1;
+               /* stop search */
+               return 1;
+       }
+       /* look for matching symlink*/
+       foreach_strpart(dev->symlink, " ", pos, len) {
+               if (strncmp(pos, find_name, len) != 0)
+                       continue;
+
+               if (len != strlen(find_name))
+                       continue;
+
+               memcpy(find_dev, dev, sizeof(struct udevice));
+               strfieldcpymax(find_path, path, NAME_SIZE);
+               find_found = 1;
+               return 1;
+       }
        return 0;
 }
+
+/**
+ * udevdb_get_dev_byname: search device with given name by traversing the whole database
+ */
+int udevdb_get_dev_byname(const char *name, char *path, struct udevice *dev)
+{
+       find_found = 0;
+       find_path = path;
+       find_dev = dev;
+       find_name = name;
+       udevdb_call_foreach(find_device_by_name);
+       if (find_found == 1)
+               return 0;
+       else
+               return -1;
+}