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-rw-r--r--udev_lib.c21
1 files changed, 16 insertions, 5 deletions
diff --git a/udev_lib.c b/udev_lib.c
index e9c16c863a..db1096ebf7 100644
--- a/udev_lib.c
+++ b/udev_lib.c
@@ -86,17 +86,28 @@ char *get_subsystem(char *subsystem)
return subsystem;
}
+#define BLOCK_PATH "/block/"
+#define CLASS_PATH "/class/"
+#define NET_PATH "/class/net/"
+
char get_device_type(const char *path, const char *subsystem)
{
- if (strcmp(subsystem, "block") == 0 ||
- strstr(path, "/block/") != NULL)
+ if (strcmp(subsystem, "block") == 0)
+ return 'b';
+
+ if (strcmp(subsystem, "net") == 0)
+ return 'n';
+
+ if (strncmp(path, BLOCK_PATH, strlen(BLOCK_PATH)) == 0 &&
+ strlen(path) > strlen(BLOCK_PATH))
return 'b';
- if (strcmp(subsystem, "net") == 0 ||
- strstr(path, "/class/net/") != NULL)
+ if (strncmp(path, NET_PATH, strlen(NET_PATH)) == 0 &&
+ strlen(path) > strlen(NET_PATH))
return 'n';
- if (strstr(path, "/class/") != NULL)
+ if (strncmp(path, CLASS_PATH, strlen(CLASS_PATH)) == 0 &&
+ strlen(path) > strlen(CLASS_PATH))
return 'c';
return '\0';