glGetShaderiv

GL_APICALL void GL_APIENTRY glGetShaderiv(
     GLuint shader,
     GLenum pname,
     GLint * params
);

	Name	Description
in	shader	Shader object
in	pname	Name of the parameter to get
out	params	Region storing the obtained parameters

No values are returned.

Gets shader object parameters.

Set shader to a shader object.

Set pname to one of the following values.

GL_SHADER_TYPE	Gets the shader type.
GL_DELETE_STATUS	Gets `GL_TRUE` if the shader object is waiting to be deleted and `GL_FALSE` otherwise. A shader object that is attached to at least one program object begins "waiting to be deleted" when `glDeleteShader` is called to delete it.
GL_COMPILE_STATUS	Always gets `GL_FALSE`.
GL_INFO_LOG_LENGTH	Always gets a value of 0.
GL_SHADER_SOURCE_LENGTH	Always gets a value of 0.

This function generates the following errors.

GL_INVALID_ENUM	The pname argument was set to an invalid value.
GL_INVALID_VALUE	The shader argument was set to an invalid value.

glGetShaderiv Function